JP2012076248A - Image recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an increase of a cost of a device by detecting a plurality of objects to be inspected by using one sensor, and to prevent an increase of the number of wiring in the device and the complication of a layout of an internal mechanism.SOLUTION: A pair of roller pairs 35 is arranged in a carrying passage 31. In the carrying roller pairs 35, pressing rollers 35B are rotatably supported by roller holders 74. The roller holders 74 are vertically movable, and a second detection mechanism 99 for detecting the vertical movement is arranged. The second detection mechanism 99 has a detector 95 and a light sensor 93, and the detector 95 advances and retreats with respect to the light sensor 93 in conjunction with the vertical movement of the roller holders 74. A cover 24 is arranged at the back face of a printer 15, and also a blocking part 94D of a sensor arm 94 which moves in conjunction with the opening/closing of the cover 24 advances and retreats with respect to the light sensor 93.

Description

  The present invention relates to an image recording apparatus including a pair of conveying rollers configured such that the other roller can be brought into contact with and separated from one roller, and a cover that opens a guide path of the recording medium. The present invention relates to an image recording apparatus capable of determining a posture.

  In an inkjet image recording apparatus capable of recording an image on a recording sheet, the recording sheet is conveyed from a paper feed cassette toward a recording unit, and the recording unit records an image on the conveyed recording sheet. . A sensor for detecting the conveyance position of the recording paper is provided upstream of the recording unit in the conveyance direction. If the recording paper is jammed in the guide path before reaching the detection position of the sensor, the recording paper is not detected by the sensor. In this case, it means that the paper has jammed on the condition that it was not detected within the time limit. Error is output. The image recording apparatus is provided with a cover for opening the guide route, and when the recording paper is jammed in the guide route, the user can remove the recording paper in the guide route by opening the cover. Is possible.

  By the way, when recording an image on a thick recording paper such as a postcard or glossy paper (hereinafter referred to as “thick paper”), when the rear end of the thick paper exits the nip point of the transport roller pair during image recording, the transport roller The pressure contact force of the pair pushes the cardboard in the feeding direction and transports the cardboard excessively. For this reason, in the recorded image recorded on the thick paper, a horizontal white line on which no ink is placed appears. As a means for preventing the generation of the white line, a mechanism is known that releases the pressure contact state by separating the rollers of the transport roller pair when the rear end of the thick paper leaves the nip point of the transport roller pair.

  Conventionally, an image recording apparatus such as an ink jet printer capable of recording an image on a label surface of a disk medium such as a CD or a DVD as well as a recording sheet and a postcard is known (see Patent Document 1). This type of image recording apparatus has a guide path (hereinafter referred to as “straight path”) that is linearly formed from a discharge port that discharges recording paper after recording to an upstream side in the discharge direction from the recording unit. . When recording an image on the label surface of the disk medium, the user inserts the disk tray into a straight path from the discharge port, and the disk medium on the disk tray is set on the upstream side of the recording unit. At this time, in order to allow the disc tray to be inserted into the upstream side of the recording unit, the rollers of the conveying roller pair provided in the linear path are separated from each other, so that a gap through which the disc tray can pass the conveying roller pair is secured. The

JP 2009-107179 A

  In the conventional image recording apparatus, when the mechanism that separates the rollers of the transport roller pair does not operate normally, the disk tray is pushed into the apparatus and the disk tray and the transport roller pair collide with each other. There is a possibility that the tray or the disk medium may be damaged, or the fragments may be mixed into details to cause the image recording apparatus to malfunction. Further, unless image recording is actually performed, it is impossible to determine whether or not a white line is generated in the recorded image, and ink is wasted due to undesired image recording. In order to solve such a problem, it is conceivable to provide a sensor to detect in advance whether or not the pair of transport rollers is separated. On the other hand, if the recording paper is fed out from the paper feed cassette with the cover open, the recording paper may jump out of the apparatus or be jammed in the guide path. Therefore, it is conceivable to provide a sensor for detecting the open / closed state of the cover in advance. However, if sensors for detecting the separation state of each roller and the open / closed state of the cover are provided, it is necessary to secure an installation space for two sensors and a lead wire drawing space, which hinders downsizing of the device. In addition, the parts cost and the assembly cost increase and the cost increases.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an image recording apparatus that can determine the separation state of each roller and the open / close state of a cover with a single sensor. .

(1) An image recording apparatus according to the present invention includes a guide path capable of guiding a recording medium, a recording unit, a cover, a pair of conveying rollers, a support member, a moving mechanism, a sensor having a sensing unit, a first A detector, a second detector, and a control unit are provided. The recording unit records an image on the recording medium conveyed in the first feeding direction along the guide route. The cover is configured to be capable of changing its posture between a first posture that forms the guide route and a second posture that opens the guide route. The conveying roller pair is provided on the upstream side in the first feeding direction from the recording unit. This pair of conveying rollers is composed of a driving roller and a driven roller that are arranged opposite to each other so as to be in contact with each other across the guide path. The support member is configured to support the driven roller and be movable between a third posture in which the driven roller contacts the driving roller and a fourth posture in which the driven roller is separated from the driving roller. The moving mechanism receives the driving force from the driving source and moves the support member from the third posture to the fourth posture. The first detector advances and retreats to a position that can be detected by the sensing unit according to the posture of the support member. The second detector moves back and forth to the detectable position according to the posture of the cover. A control part determines the attitude | position of the said supporting member and the attitude | position of the said cover based on the output signal from the said sensor.

  The support member is movable between the third posture and the fourth posture, and is moved to the third posture or the fourth posture by the moving mechanism. The first detector moves back and forth to the detectable position according to the posture of the support member. The output signal from the sensor differs when the first detector enters the detectable position and when it retracts from the detectable position. That is, the output signal from the sensor changes according to the advancement / retraction of the first detector to the detectable position. The control unit determines the posture of the support member based on this change. The second detector advances and retreats to and from the detectable position according to the posture of the cover. The output signal from the sensor differs between when the second detector enters the detectable position and when it retracts from the detectable position. That is, the output signal from the sensor changes according to the advancement / retraction of the second detector to the detectable position. A control part determines the attitude | position of a cover based on this change.

  Thus, since this invention is comprised, the attitude | position of a support member and the attitude | position of a cover can be determined with one sensor. Thereby, it is possible to prevent an increase in the cost of the device, and to prevent an increase in wiring in the device and a complicated layout of the internal mechanism.

(2) The first detector is rotatably provided so that the detected portion detected by the sensor passes through the detectable position. The first detector enters the detectable position when the support member is in a fifth attitude other than the third attitude, and retreats from the detectable position when the support member is in a position other than the fifth attitude. It is configured. The second detector is provided to be rotatable between the detectable position and a retracted position above or below the detectable position, and the retracted position is set when the cover is in the first posture. maintain. The second detector is configured to be able to enter the detectable position when the cover is in the second posture and the first detector is retracted from the detectable position.

(3) The support member supports the driven roller below the drive roller. The moving mechanism is connected to the support member in the vertical direction, transmits a rotational force from the drive source, a biasing member that elastically biases the support member upward, and the cam A cam fixed to the shaft; and a cam receiving portion that is provided on the upper side of the cam shaft and presses the cam shaft downward by contacting the cam. The first detector is fixed to the camshaft.

(4) The control unit determines the position of the support member based on a change in an output signal of the sensor when the first detector rotating together with the cam shaft enters the detectable position, and It is preferable to determine the posture of the cover based on a change in the sensor output signal when one detector retracts the detectable position.

  According to the present invention, it is possible to detect the attitude of the support member and the attitude of the cover with a single sensor. For this reason, since it is not necessary to provide two sensors for every two detection targets, it is possible to prevent an increase in the cost of the device, and to prevent an increase in wiring in the device and a complicated layout of the internal mechanism.

1 is a perspective view illustrating an external appearance of a multifunction machine 10. 2 is a schematic cross-sectional view schematically showing a configuration of a printer unit 15. FIG. 3 is a perspective view illustrating a configuration of a transfer device 30. FIG. 7 is a perspective view illustrating a configuration of a cam moving mechanism 88. FIG. FIG. 6 is a perspective view showing a configuration inside a case 69. 4 is a perspective view showing a configuration of a first detection mechanism 52. FIG. 7 is a perspective view showing a configuration of a second detection mechanism 99. FIG. FIG. 10 is a cross-sectional view for explaining the operation of the second detection mechanism 99. 2 is a block diagram illustrating a configuration of a control unit 100. FIG. It is a flowchart which shows the procedure of the cam initial position setting process performed by CPU101. 3 is a flowchart illustrating a procedure of normal image recording processing executed by a CPU 101. 4 is a flowchart illustrating a procedure of image recording processing for cardboard executed by a CPU. It is a flowchart which shows the procedure of the label image recording process performed by CPU101.

  Hereinafter, an MFP 10 according to an embodiment of the present invention will be described with reference to the drawings as appropriate. In the following description, the vertical direction 7 of the multifunction device 10 is defined with reference to the state in which the multifunction device 10 is installed (the state shown in FIG. 1), and the side on which the operation panel 16 is provided is in front. A front-rear direction 8 is defined as the side (front), and a left-right direction 9 is defined when the multifunction machine 10 is viewed from the front (front).

[Outline of MFP 10]
As shown in FIG. 1, the multifunction machine 10 includes a printer housing 11, a scanner housing 12 provided on the upper side of the printer housing 11, and a document cover 13 provided on the upper side of the scanner housing 12. And an operation panel 16 having an LCD 16A. The document cover 13 is supported by the scanner housing 12 so as to be openable and closable, and closes to sandwich the document with the scanner housing 12. The image of the document is scanned and captured by a scanner (not shown) such as a flat bed scanner housed in the scanner housing 12. The scanner housing 12 in which the scanner is accommodated is supported by the printer housing 11 so that it can be opened and closed.

  The printer housing 11 includes an accommodation space 18 in which the paper feed cassette 14 is accommodated in the lower part. The accommodation space 18 is provided from the opening 17 formed in the front surface of the printer housing 11 to the rear back part. The paper feed cassette 14 is supported in the housing space 18 so that it can be inserted and removed in the front-rear direction 8. A plurality of recording sheets are held in the sheet feeding cassette 14. The paper feed cassette 14 can hold not only recording paper called so-called plain paper but also thick recording paper (thick paper) such as postcards and glossy paper.

  A tray guide 45 is provided above the accommodation space 18. A disk tray (not shown) is supported on the upper surface of the tray guide 45 so that it can be inserted and removed in the front-rear direction 8. The disc tray is a flat member having a thickness of about 3 mm that holds a disc medium such as a CD or a DVD. When the disc tray is inserted into the tray guide 45 while the disc medium is held on the disc tray, the disc medium is set at a position where the recording unit 20 can record.

  Control of the printer unit 15 and the above-described scanner is performed by a control unit 100 (see FIG. 9) described later. The control unit 100 drives the printer unit 15 on the basis of signals and data input from the operation panel 16 of FIG. 1 and an external device such as a personal computer, and records an image on a recording medium. Further, as will be described later, the control unit 100 detects the presence of a recording sheet being conveyed and the conveyance position, detects the position of a roller holder 74 described later, and detects the open / closed state of a cover 24 described later. Process is also performed.

[Printer unit 15]
The printer unit 15 records an image on a transported recording medium. As shown in FIG. 2, the printer unit 15 mainly includes a paper feed cassette 14 that holds the recording paper 19 and a transport device 30 that transports the recording paper 19. A recording unit 20 (an example of the recording unit of the present invention) that records an image on the recording paper 19, and a cover 24 (an example of the cover of the present invention) for opening and closing the back side of the printer unit 15. Prepare.

[Recording unit 20]
The recording unit 20 includes a recording head 21 disposed above the rear portion of the paper feed cassette 14, a carriage 23 that holds the recording head 21, and a rail (with the carriage 23 that supports the recording head 21 so as to be slidable in the left-right direction 9. And a drive unit including a carriage motor 111 (see FIG. 9) and a drive transmission mechanism that transmits the driving force to the carriage 23.

[Recording head 21]
The recording head 21 includes a nozzle having an ejection port. When the nozzle is deformed by a piezoelectric element or the like, an ink droplet is ejected from the ejection port toward the lower platen 22. Further, the recording head 21 is reciprocated in the left-right direction 9 under the driving force of the carriage motor 111 (see FIG. 9). As will be described later, the recording paper 19 is ejected from the recording head 21 that reciprocates in the left-right direction 9 in the process of being conveyed forward on the platen 22, thereby An image can be recorded on almost the entire surface.

[Conveying device 30]
As shown in FIG. 3, the transport device 30 includes a paper feed roller 41 (see FIG. 2), a transport roller pair 35 (an example of the transport roller pair of the present invention), and the presence or absence of a recording medium in the transport path 31. It has the 1st detection mechanism 52 which detects a position, the 2nd detection mechanism 99 for detecting the position of the roller holder 74, and the opening-and-closing state of the cover 24, the cam drive mechanism 88, and the flame | frame 25 which supports these. . In FIG. 3, the paper feed roller 41 is not shown.

[Frame 25]
A pair of frames 25 are provided on the rear side of the printer unit 15 so as to face each other with a predetermined interval in the left-right direction 9. The frame 25 is formed of a metal plate, and is fixed to a base frame 39 disposed below the frame 25. Specifically, the base frame 39 is formed of a metal plate, and the lower end on the rear side of the frame 25 is connected to the base frame 39.

[Feeding roller 41]
As shown in FIG. 2, the paper feed roller 41 feeds the recording paper 19 placed on the paper feed cassette 14 to the transport path 31. The paper feed roller 41 is disposed above the rear portion of the paper feed cassette 14 and is rotatably supported at the tip of an arm 43 that rotates about a support shaft 42. The support shaft 42 is supported by the frame 25 and the like so as to be rotatable about its central axis. When the driving force of the sheet feeding motor 112 (an example of the driving source of the present invention, see FIG. 9) is transmitted to the support shaft 42, the driving force transmitted from the support shaft 42 via the plurality of transmission gears 44 is supplied. The paper roller 41 rotates. The recording paper 19 is sent out to the conveyance path 31 by rotating the paper supply roller 41 in contact with the recording paper 19. Note that a switching gear 114 (see FIG. 9) is provided on the output side of the sheet feeding motor 112, and the driving force of the sheet feeding motor 112 is supplied by switching the drive transmission path of the switching gear 114. It is transmitted to either the paper roller 41 or the cam drive mechanism 88 (see FIG. 4).

[Conveyance path 31]
As shown in FIG. 2, a conveyance path 31 (an example of the guide path of the present invention) is formed in the printer unit 15. The conveyance path 31 includes a first conveyance path 32 having an arc cross section in which one end is located on the rear end portion of the paper feed cassette 14 and the other end is located behind the conveyance roller pair 35, and the platen 22 from the conveyance roller pair 35 to the platen 22. A linear second conveyance path 33 that reaches the front of the discharge roller pair 36 through the recording head 21 is formed. The first transport path 32 is formed of an inner guide member 32A that is formed in an arc shape and is opposed to each other in the radial direction, and an outer guide member 32B that is configured integrally with a cover 24 described later. The recording paper 19 delivered from the paper feed cassette 14 is guided by the first conveyance path 32 and the second conveyance path 33 to reach the recording unit 20, and then passes through the second conveyance path 33 to the paper discharge unit 14A. Discharged.

[Second transport path 33]
The second conveyance path 33 is a linear path formed by the recording head 21 and the platen 22 disposed to face the recording head 21. The second transport path 33 passes not only the recording paper 19 from the paper feeding cassette 14 but also a disc tray (not shown) inserted backward from the opening 17. In this embodiment, the platen 22 and a pressing roller 35B described later are shown in FIG. 2 so that the disc tray can pass between the platen 22 and the recording head 20 when the disc tray is inserted into the apparatus. In FIG. 1, the upper position indicated by the solid line is movable to the lower position indicated by the wavy line.

[Cover 24]
A cover 24 is provided on the back surface of the printer unit 15. A support shaft 24 </ b> A is provided at the lower end of the cover 24. The support shaft 24A is rotatably supported by a frame (not shown). The cover 24 is centered on the support shaft 24A, and is separated from the rear surface of the printer unit 15 in a first posture (corresponding to the first posture of the present invention, which is indicated by a solid line in FIG. 2). And the second posture that exposes the inside of the printer unit 15 (corresponding to the second posture of the present invention, the posture indicated by the wavy line in FIG. 2). An outer guide member 32 </ b> B is provided on the inner surface of the cover 24. The outer guide member 32 </ b> B is configured integrally with the cover 24. Therefore, when the cover 24 rotates, the outer guide member 32B also rotates in the same direction as the rotation direction of the cover 24. In the present embodiment, when the cover 24 is in the first posture, the outer guide member 32B is disposed at a position facing the inner guide member 32A, and the first transport path 32 is formed by the outer guide member 32B and the inner guide member 32A. Is formed. On the other hand, when the cover 24 changes its posture from the first posture to the second posture, the outer guide member 32B moves away from the inner guide member 32A, and the first transport path 32 is opened.

  A pressing member 29 is provided integrally with the cover 24 on the inner surface of the cover 24. The pressing member 29 is provided at the right end portion of the cover 24, that is, at the back right side of the printer unit 15 so as not to interfere with the recording paper passing through the first conveyance path 32. For this reason, even when the cover 24 is in the first posture, the pressing member 29 is disposed outside the right end portion of the first transport path 32. The pressing member 29 has an inclined surface 29A that can press a rear arm portion 94C of a sensor arm 94 (described later) downward in the process in which the cover 24 rotates from the second posture to the first posture.

[Conveying roller pair 35]
As shown in FIG. 2, in the second conveyance path 33, rearward of the recording unit 20, in other words, upstream of the direction in which the recording paper 19 is conveyed during recording (corresponding to the first feeding direction of the present invention). Are provided with a pair of transport rollers 35 so as to sandwich the transport path 31. As shown in FIG. 3, the conveyance roller pair 35 is composed of an upper conveyance roller 35A (an example of a driving roller of the present invention) and a lower pressing roller 35B (an example of a driven roller of the present invention). . The upper transport roller 35A is supported by the frame 25 so as to be rotatable about its central axis, and is rotated by the driving force of the transport motor 113 (see FIG. 9). The lower pressing roller 35B is supported by a roller holder 74 described later so as to be rotatable about its central axis.

[Discharge roller pair 36]
As shown in FIG. 2, a pair of discharge rollers 36 is provided in front of the recording unit 20 so as to sandwich the second conveyance path 33. The discharge roller pair 36 includes an upper pinch roller 36A and a lower discharge roller 36B. The upper pinch roller 36A is supported by the frame 25 and the like so as to be rotatable about its central axis. The lower discharge roller 36B is rotatably supported by the platen 22.

[Roller holder 74]
As shown in FIGS. 3 and 4, the roller holder 74 (an example of the support member of the present invention) is provided slightly behind the conveying roller pair 35. The roller holder 74 is configured as a separate member from the platen 22. The roller holder 74 has a shape that is long in the left-right direction 9 by connecting four blocks in the left-right direction 9. A pressing roller 35B is rotatably supported at the front upper end of each block. In the present embodiment, the roller holder 74 supports eight pressing rollers 35 </ b> B arranged in a straight line along the left-right direction 9. A plurality of support shafts 76 (see FIG. 6) are provided at the upper rear end of the roller holder 74. The support shaft 76 is supported by a bearing groove 26C (see FIG. 7) provided in the subframe 26 described later. With this configuration, the roller holder 74 can rotate around the support shaft 76. Specifically, the roller holder 74 has a third posture in which the pressing roller 35B contacts the upper conveying roller 35A (the posture shown by a solid line in FIG. 2, which corresponds to the third posture of the present invention), and the pressing roller 35B conveys the roller holder 74. It can be rotated around a support shaft 76 between a fourth posture (a posture shown by a wavy line in FIG. 2, which corresponds to the fourth posture of the present invention) spaced downward from the roller 35A.

  As shown in FIG. 4, a subframe 26 formed of a metal plate is provided below the roller holder 74. Both ends of the subframe 26 are fixed to the frame 25. A coil spring 78 (an example of an urging member of the present invention) is provided between the roller holder 74 and the subframe 26. In FIG. 4, the conveyance roller 35A is not shown. The coil spring 78 is provided at a position near the pressing roller 35 </ b> B so that the expansion / contraction direction is the vertical direction 7. Specifically, the upper end of the coil spring 78 is accommodated in a spring holder 78A provided on the back surface (lower surface) of the upper wall of the roller holder 74, and the lower end of the coil spring 78 is attached to the subframe 26. The coil spring 78 is provided between the roller holder 74 and the sub-frame 26 in a contracted state so as to apply a set biasing force to the transport roller 35A. As a result, an upward biasing force for the coil spring 78 to extend is applied to the roller holder 74, and the roller holder 74 maintains the third posture. The upward biasing force of the coil spring 78 acts on the pressing roller 35B via the roller holder 74, and the pressing roller 35B is pressed against the conveying roller 35A with the biasing force. When the front end portion of the roller holder 74 is lowered downward against the urging force by a cam drive mechanism 88 described later, the roller holder 74 moves from the third posture to the fourth posture, and the pressing roller 35B is also transported. Move away from 35A.

[First detection mechanism 52]
The first detection mechanism 52 is for realizing a function of detecting the position of the recording paper 19 conveyed toward the recording unit 20 in the conveyance path 31 and the position of the rear end of the disc tray inserted in the apparatus. It is. As shown in FIG. 3, the first detection mechanism 52 is provided behind the pair of transport rollers 35 (upstream in the transport direction during recording). The first detection mechanism 52 includes a case 69 that covers the rear part of the roller holder 74 and accommodates each component of the first detection mechanism 52, and a photosensor 68 provided outside the left end of the case 69. The case 69 has a shape that is long in the left-right direction 9, and the case 69 is fixed to the subframe 26 by engaging a plurality of claws (not shown) provided at the front end of the case 69 with the subframe 26. As shown in FIG. 5, a rotating shaft 57 extending from near the center in the left-right direction 9 to the outside of the left end is rotatably supported in the case 69. An arm-shaped rotor 67 is fixed to the rotating shaft 57. A slit 59 is formed at the center of the case 69 in the left-right direction 9, and the rotor 67 protrudes upward from the rotation shaft 57 and is exposed from the inside of the case 69 to the outside through the slit 59. A detector 54 is provided at the left end of the rotating shaft 57. The detector 54 protrudes in the same direction as the rotor 67. The rotor 67 and the detector 54 are fixed to the rotation shaft 57. Therefore, when a rotational force is applied to the rotor 67, the detector 54 rotates in the same direction in conjunction with the rotor 67.

[Optical sensor 68]
The optical sensor 68 is a transmissive photo interrupter in which a light emitting element and a light receiving element are arranged to face each other. In the optical sensor 68, the light receiving element receives the light emitted from the light emitting element, and outputs an electrical signal (sensor signal) corresponding to the amount of received light. The light emitting element and the light receiving element are disposed at the tip of the optical sensor 68, and this portion is a sensing unit 68A (see FIG. 6) of the optical sensor 68, and a light path (optical path) from the light emitting element to the light receiving element is provided. This is a detectable position of the sensing unit 68A. The optical sensor 68 is attached to the frame 25 so that the optical path of the sensing unit 68 </ b> A is arranged in the rotation range of the detector 54. In this embodiment, when the recording paper 19 and the disc tray are not present in the transport path 31, the tip 54A of the detector 54 enters the optical path of the sensing unit 68A and blocks the optical path (see FIG. 6). At this time, a low level sensor signal is output from the optical sensor 68. When the sensor signal is at the LOW level, the control unit 100 determines that the distal end portion 54A has entered the optical path of the sensing unit 68A. Further, when the recording paper 19 or the disk tray is guided through the conveyance path 31 and pushes down the rotor 67, the detector 54 rotates in conjunction with the rotation, and the tip 54A is retracted from the optical path of the sensing unit 68A. At this time, a high level sensor signal is output from the optical sensor 68. The control unit 100 determines that the recording paper 19 or the disc tray has passed through the rotor 67 when the sensor signal changes from LOW to HIGH.

[Rotation restriction mechanism 80]
As shown in FIGS. 5 and 6, a rotation restricting mechanism 80 is attached to the right end portion of the rotation shaft 57. A torsion coil spring 58 (hereinafter abbreviated as “spring 58”) is attached to the rotor 67, and this spring 58 is an urging force F1 that the rotor 67 tries to rotate backward from the posture shown in FIG. Is given to the rotor 67. The rotation restricting mechanism 80 restricts the rotation of the rotor 67 by the biasing force F <b> 1 of the spring 58. The rotation restricting mechanism 80 includes a joint 83 connected to the right end portion of the rotation shaft 57, a restricting member 81 fixed to the joint 83, and a torsion coil spring 82 (hereinafter referred to as “spring 82”) attached to the restricting member 81. ). The joint 83 is connected to the right end of the rotary shaft 57 so as to be coaxially rotatable with the rotary shaft 57. The joint 83 is configured to allow the restricting member 81 to allow the rotor 67 to turn forward from the posture shown in FIG. 6 and restrict the turning to the rear. .

  As shown in FIG. 5, the restricting member 81 has a stopper 85 that protrudes in a direction perpendicular to the rotation shaft 57. The stopper 85 protrudes rearward from the regulating member 81. The spring 82 applies a biasing force F <b> 2 that is greater than that of the spring 58 to the regulating member 81. Due to this urging force F <b> 2, the regulating member 81 tries to rotate in the urging direction of the spring 58. That is, the urging force F2 acts in the direction opposite to the direction of the urging force F1. For example, the stopper 85 engages with the case 69 to restrict the rotation of the restricting member 81 so that the rotor 67 is held in a posture vertically protruding upward from the slit 59 (see FIGS. 5 and 6). To do. Since it is configured in this way, the force applied to each member is balanced, and the rotor 67 protrudes upward from the rotary shaft 57 in the posture shown in FIGS. The posture that crosses the conveyance path 33 is maintained. On the other hand, when the rotor 67 is pressed forward from the rear by the recording paper 19, the rotor 67 rotates so as to fall forward against the urging force F1 of the spring 58. Further, when the rotor 67 is pressed from the front to the rear by the disc tray, the rotor 67 rotates so as to fall backward against the biasing force F2 of the spring 82.

[Cam drive mechanism 88]
The cam driving mechanism 88 is a mechanism that receives the driving force from the paper feeding motor 112 (see FIG. 7) and moves the roller holder 74 between the third posture and the fourth posture described above. As shown in FIG. 4, the cam drive mechanism 88 mainly includes a bearing portion 89, a cam shaft 90 (an example of the cam shaft of the present invention), two cams 91 (an example of the cam of the present invention), It has a shaft guide 75 and a link member 92. The bearing portion 89 is integrally provided at the front end portion of the roller holder 74. The bearing portion 89 is an annular member in which a ring larger than the outer diameter of the cam shaft 90 is formed. The shaft guides 75 are provided at both ends of the sub-frame 26 provided on the lower side of the roller holder 74 and are erected upward from the upper surface of the sub-frame 26. Each shaft guide 75 supports the cam shaft 90 so as to be rotatable and supports the cam shaft 90 so as to be movable in the vertical direction 7, and has a vertically long guide groove 75 </ b> A and a hook shape from the upper end of the shaft guide 75 to the left side. And a cam receiving portion 75B (an example of the cam receiving portion of the present invention) protruding in the direction. Both ends of the cam shaft 90 are inserted into the guide grooves 75 </ b> A of the shaft guide 75 of the sub-frame 26 while being passed through the ring of the bearing portion 89. Thereby, the cam shaft 90 is supported so as to be movable in the vertical direction 7 along the guide groove 75A. A cam 91 is fixed to the cam shaft 90. The cam 91 is fixed to the cam shaft 90 so as to be positioned below the cam receiving portion 75B of the shaft guide 75. The link member 92 is a portion that receives a driving force from the paper feeding motor 112 and is fixed to the right end of the cam shaft 90.

  When the link member 92 is in the posture shown in FIG. 4, the cam 91 is in a free state. At this time, the cam shaft 90 is supported by the lower portion of the bearing portion 89. Further, the roller holder 74 is held in a third posture in which the pressing roller 35B is pressed against the transport roller 35A by the upward biasing force of the coil spring 78. On the other hand, when the driving force of the paper feeding motor 112 (see FIG. 9) is input to the link member 92 and the cam shaft 90 rotates, the cam 91 also rotates. When the outer edge portion of the cam 91 comes into contact with the cam receiving portion 75B by the rotation of the cam 91, the cam shaft 90 is pressed downward, and the cam shaft 90 moves downward. When the cam shaft 90 moves downward, the front end portion of the roller holder 74 together with the bearing portion 89 moves to the fourth posture below the third posture against the urging force of the spring 78 so as to be pulled by the cam shaft 90. To do. Thereby, the pressing roller 35B is separated from the conveying roller 35A. The moving mechanism of the present invention is realized by the cam driving mechanism 88.

[Second detection mechanism 99]
The second detection mechanism 99 is for realizing a function of detecting the position of the roller holder 74 moving in the vertical direction 7 and a function of detecting the posture of the cover 24. As shown in FIG. 7, the second detection mechanism 99 is provided at the right end of the subframe 26. The second detection mechanism 99 includes an optical sensor 93 (an example of the sensor of the present invention) housed in a case 69, a detector 95 (an example of the first detector of the present invention), and a sensor arm 94 (the present invention). An example of a second detector).

  The optical sensor 93 has the same configuration as the optical sensor 68 described above, and is a transmissive photo interrupter in which a light emitting element and a light receiving element are arranged to face each other. The light-emitting element and the light-receiving element are arranged at the tip of the optical sensor 93, the corresponding part is the sensing unit 93A of the optical sensor 93, and the light path (optical path) from the light-emitting element to the light-receiving element is detected by the sensing unit 93A. It is a possible position. The optical sensor 93 is accommodated in the case 69 as shown in FIG. Specifically, the case 69 is fixed to the inner wall of the right end portion. A vertical wall 26A is provided at the rear end of the sub-frame 26 so as to stand vertically upward. At the right end of the vertical wall 26A, a rectangular cutout 26B having an open top is formed. Although the case 69 and the roller holder 74 are not shown in FIG. 7, when the roller holder 74, the case 69, and the subframe 26 are assembled, the sensing portion 93A of the optical sensor 93 is cut as shown in FIG. It is inserted forward from the notch 26B. In the present embodiment, the optical sensor 93 is arranged so that the optical path of the sensing unit 93A is parallel to the cam shaft 90, and the central axis of the cam shaft 90 and the optical path are at the same height. .

  The detector 95 is fixed to the right end portion of the cam shaft 90. Therefore, when the cam shaft 90 rotates, the detector 95 also rotates in the same direction as the rotation direction of the cam shaft 90. The detector 95 is a plate member that protrudes perpendicularly from the cam shaft 91 and has a generally fan shape when viewed from the side. When the detector 95 rotates with the rotation of the cam shaft 90, the tip 95A (corresponding to the detected portion of the present invention) of the detector 95 follows the optical path of the sensing unit 93A of the optical sensor 93. It is provided so that it can pass through. As described above, when the cam shaft 90 rotates, the roller holder 74 moves up and down. Therefore, when the roller holder 74 is moved in the vertical direction 7 by the cam driving mechanism 88, the tip 95A of the detector 95 enters the sensing unit 93A or retracts from the sensing unit 93A according to the moving position. .

  The sensor arm 94 is formed in an arm shape that is long in the front-rear direction 8, and includes a support shaft 94A extending in the left-right direction 9, a front arm portion 94B extending forward from the support shaft 94A, and rearward from the support shaft 94A. The rear arm portion 94C is extended, and the shielding portion 94D is provided at the tip (front end) of the front arm portion 94B. Since the support shaft 94A is supported by a frame (not shown), the sensor arm 94 can be rotated about the support shaft 94A. The sensor arm 94 is provided at a position where the shielding part 94D can pass through the optical path of the sensing part 93A of the optical sensor 93 when the sensor arm 94 rotates. A torsion coil spring 96 (hereinafter referred to as “spring 96”) that applies a rotational force that moves the shielding portion 94D downward is attached to the support shaft 94A. As described above, when the cover 24 rotates from the second posture to the first posture, the rear arm portion 94C is pressed downward by the pressing member 29 (see FIG. 2) in the turning process. Accordingly, the front arm portion 94B moves upward against the urging force of the spring 96. Then, when the cover 24 is in the first posture, the shielding part 94D is disposed at a retracted position (position shown in FIGS. 7 and 8A) located above the optical path of the sensing part 93A. On the other hand, when the cover 24 is rotated from the first posture to the second posture, the pressing member 29 is separated from the rear arm portion 94C, and the pressing to the rear arm portion 94C is released. Accordingly, the front arm portion 94B can move downward by the biasing force of the spring 96, and the shielding portion 94D can enter the optical path of the sensing portion 93A.

  Next, with reference to FIG. 8, the operation of the second detection mechanism 99, specifically, the operation and positional relationship of the detector 95 and the sensor arm 94 will be described. FIG. 8 is a cross-sectional view of the second detection mechanism 99 when viewed from the left side. FIG. 8A shows a state where the detector 95 enters the optical path of the sensing unit 93A. (B) shows a state where the camshaft 90 is rotated 90 ° clockwise from the state (A), and (C) shows the camshaft 90 rotating clockwise from the state (A). A state in which the camshaft 90 is rotated by 180 ° in the clockwise direction from the state in (A) is shown in FIG.

  As shown in FIG. 8A, when the detector 95 enters the optical path of the sensing unit 93A, the tip 95A of the detector 95 blocks the optical path. At this time, a low level sensor signal is output from the optical sensor 93. When the distal end portion 95A enters the optical path, even if the cover 24 is opened and assumes the second posture, the shielding portion 94D interferes with the distal end portion 95A of the detector 95, and the shielding portion 94D enters the optical path. I cannot enter. When the distal end portion 95A enters the optical path, the roller holder 74 is not in the third posture, and is in another posture, for example, the fourth posture in which the pressing roller 35B is separated from the transport roller 35A. . The posture at this time corresponds to the fifth posture of the present invention.

  When the cam shaft 90 is rotated 90 ° clockwise from the state shown in FIG. 8A, the detector 95 is also rotated in the same direction, and the tip 95A is retracted from the optical path of the sensing unit 93A (FIG. 8 ( B)). At this time, when the cover 24 is closed and is in the first posture, the sensor arm 94 maintains the posture shown by the solid line in FIG. 8B, so that the shielding portion 94D is retracted without entering the optical path. Maintain position. On the other hand, when the cover 24 is opened and in the second posture, the shielding portion 94D moves downward and enters the optical path of the sensing portion 93A because it does not interfere with the tip portion 95A. The cam 91 is in a position where it does not contact the cam receiving portion 75B. For this reason, the cam shaft 90 is positioned at the upper end of the guide groove 75A (see FIG. 4), the roller holder 74 maintains the third posture, and the pressing roller 35B maintains the pressure contact state with the transport roller 35A. When the shielding unit 94D is retracted from the optical path of the sensing unit 93A, a high-level sensor signal is output from the optical sensor 93, and when the shielding unit 94D enters the optical path of the sensing unit 93A, A sensor signal of LOW level is output from the sensor 93.

  When the cam shaft 90 further rotates 90 ° in the clockwise direction, the cam 91 comes into contact with the cam receiving portion 75B and pushes the cam shaft 90 downward. As a result, the roller holder 74 gradually moves downward together with the pressing roller 35B.

  When the cam shaft 90 further rotates 90 ° in the clockwise direction, the cam shaft 90 is lowered to the lower end of the guide groove 75B. As a result, the roller holder 74 changes from the third posture to the fourth posture, and the pressing roller 35B moves downward and separates from the transport roller 35A.

  When the camshaft 90 further rotates 90 °, the detector 95 enters the optical path of the sensing unit 93A as shown in FIG. 8A. At this time, even if the shielding part 94D is arranged in the optical path, the detector 95 pushes up to the upper retracted position and retracts from the optical path.

  Next, the configuration of the control unit 100 (an example of the control unit of the present invention) will be described with reference to FIG.

  As illustrated in FIG. 9, the control unit 100 mainly includes a CPU 101, a ROM 102, and a RAM 103. The CPU 101, the ROM 102, and the RAM 103 are connected to each other via a bus line. The control unit 100 is connected to the operation panel 16, the carriage motor 111, the paper feed motor 112, the transport motor 113, the encoder 116, the optical sensor 68, and the optical sensor 93 via the input / output port 105.

  The CPU 101 controls each function of the MFP 10 and controls each unit connected to the input / output port 105 according to data values and programs stored in the ROM 102 and RAM 103. The ROM 102 is a non-rewritable memory that stores a control program executed by the multifunction machine 10. A program for executing each process described later shown in the flowcharts of FIGS. 10 to 13 is stored in the ROM 102. The RAM 103 is a rewritable volatile memory, and temporarily stores data necessary for executing each process, and stores information such as a threshold used for each process.

  Hereinafter, the procedure of processing executed by the CPU 101 will be described with reference to FIGS. 10 to 13.

  First, the cam initial position setting process will be described based on the flowchart of FIG. This cam initial position setting process is executed, for example, when the main power of the multifunction machine 10 is turned on, when the multifunction machine 10 is reset, or when the image recording process is forcibly terminated. The CPU 101 switches the drive transmission path of the paper feeding motor 112 from the path transmitting to the paper feeding roller 41 to the path transmitting to the cam driving mechanism 88 and prepares to transmit the driving force to the cam driving mechanism 88. Thereafter, in step S11, the CPU 101 determines whether the level of the output signal from the optical sensor 93 is HIGH. By this determination, it can be determined whether the optical path of the optical sensor 93 is blocked by either the detector 95 or the sensor arm 94. Here, when the signal level is HIGH, the cover 24 is in the first posture, but the position of the detector 95 is indeterminate. Therefore, when the signal level is HIGH, the CPU 101 drives and controls the paper feeding motor 112 to grasp the position of the detector 95 and rotates the cam shaft 90 until the signal level becomes LOW ( S12, S13). That is, the camshaft 90 is rotated until the detector 95 enters the optical path of the optical sensor 93 (see FIG. 8A).

  If the signal level is LOW in step S13, the CPU 101 further rotates the camshaft 90 by 90 ° (S14). As a result, the detector 95 is retracted from the optical path, assumes the posture shown in FIG. 8B, and the signal level becomes HIGH again. At this time, the roller holder 74 maintains the third posture in which the pressing roller 35B is pressed against the conveying roller 35A (see FIG. 8B). Thereafter, information indicating that the roller holder 74 is in the third posture is recorded in the RAM 103 (S15).

  On the other hand, when the level of the output signal from the optical sensor 93 is LOW in step S11, the CPU 101 rotates the camshaft 90 by 90 degrees (S16). When the signal level is LOW, it means that either the detector 95 or the sensor arm 94 has entered the optical path. When the camshaft 90 rotates 90 ° from this state, at least the detector 95 is retracted from the optical path. In the next step S <b> 17, the CPU 101 determines again whether the level of the output signal from the optical sensor 93 is HIGH. Here, when the signal level is HIGH, it is determined that the cover 24 is in the first posture and the detector 95 is retracted from the optical path of the optical sensor 93, and the processing from step S12 described above is performed. .

  If the level of the output signal from the optical sensor 93 is LOW in step S17, it means that the cover 24 is in the second posture, that is, the second transport path 32 is opened. In this case, the CPU 101 outputs cover error information indicating that the cover 24 is open to the LCD 16A (S18). Thereafter, after the elapse of 500 ms (S19), the CPU 101 performs the processes after step S17 described above.

  In this way, by executing the cam initial position setting process, it can be determined whether the cover 24 is in the first posture or the second posture, and the roller holder 74 is initialized by grasping the position of the roller holder 74. It can be moved to the third posture which is the set position.

  Next, normal image recording processing performed on the recording paper 19 will be described based on the flowchart of FIG.

  First, in step S21, the CPU 101 determines whether the level of the output signal from the optical sensor 93 is HIGH. Since the roller holder 74 is set to the third posture by the cam initial position setting process, it can be determined whether or not the cover 24 is in the first posture by the determination. Here, when the signal level is LOW, it means that the cover 24 is in the second posture, that is, the second transport path 32 is opened. Therefore, the CPU 101 indicates that the cover 24 is opened. The cover error information shown is output to the LCD 16A (S22). Thereafter, after 500 ms has passed (S23), the process of step S21 is performed again.

If the signal level from the optical sensor 93 is HIGH in step S21, the CPU 101 reads information on the roller holder 74 stored in the RAM 103, and confirms that the roller holder 74 is in the third posture (S24). Thereafter, an interrupt command is issued (S26). If it is not confirmed in step S24 that the roller holder 74 is in the third posture, the above-described cam initial position setting process is performed (S25), and after the roller holder 74 is moved to the third posture, step S26 is performed. The subsequent processing is executed. The interrupt command is a command for starting an interrupt process, which will be described later, for monitoring the state of the cover 24 during feeding of the recording paper 19 fed from the paper feed cassette 14. After issuing the interrupt command, the recording paper 19 is fed from the paper feed cassette 14 (S27). When the recording paper 19 is fed to the rotor 67 and the signal level from the optical sensor 68 is changed from LOW to HIGH, the CPU 101 conveys the recording paper 19 to the front of the conveyance roller pair 35. It is determined that the paper feed process has been performed, and the paper feed process is terminated. Thereafter, the CPU 101 issues an interrupt release command (S28).
Feed processing

  The interrupt process starts from step S41. First, in step S41, the CPU 101 determines whether the level of the output signal from the optical sensor 93 is HIGH. If the signal level is HIGH in step 41, it means that the cover 24 is in the first posture. In this case, in the next step S42, it is determined whether or not the interrupt release command in step S28 has been issued, and the processes in steps S41 and S42 are repeated until the interrupt release command is issued. If an interrupt release command is issued, the interrupt process ends.

  If the signal level is LOW in step 41, it means that the cover 24 is in the second posture. In this case, in order to prevent the recording paper 19 from being jammed, the paper feeding process is stopped (S43), the cover error information is output to the LCD 16A (S44), and the image recording process is forcibly terminated (S45). ). If the image recording process is forcibly terminated, the above-described cam initial position setting process is executed again.

  When the interruption process is completed, image recording is executed in step S29, and then the recording paper 19 is discharged (S30).

  Next, image recording processing performed on thick paper such as postcards and glossy paper will be described based on the flowchart of FIG. Note that the description of processes substantially the same as those in the flowchart of FIG. 11 is simplified.

  First, in step S51 to step S58, the CPU 101 performs processing similar to that in step S21 to step S28 described above (including interrupt processing after step S41). After the interruption process, the CPU 101 starts a process for detecting the leading edge position of the cardboard in the conveyance path 31 based on the level of the output signal of the optical sensor 68. When the leading end of the thick paper pushes down the rotor 67 while transporting the thick paper, the detector 54 rotates and retreats forward from the sensing unit 68A of the optical sensor 68. At this time, the output signal of the optical sensor 68 changes from LOW to HIGH. The CPU 101 detects that the leading edge of the recording paper 19 has passed through the rotor 67 based on the change at this time. Thereafter, when the leading end of the thick paper reaches the image recording start position, image recording is started by the recording unit 20 (S59). During image recording, intermittent conveyance is performed in which a process of conveying a predetermined amount of thick paper and a process of stopping the conveyance are repeated, and the carriage 23 reciprocates while the conveyance of the thick paper is stopped, and ink droplets are ejected from the recording head 21. By discharging, an image (band image) having a predetermined width is recorded on the cardboard. Then, by repeating such image recording with a predetermined width, an image is recorded on the cardboard.

    When the image recording is started, the CPU 101 starts processing for detecting the rear end position of the thick paper in the transport path 31 based on the level of the output signal of the optical sensor 68. When the rear end of the thick paper passes through the rotor 67 during the transport of the thick paper, the rotor 67 returns to the original position, and the detector 54 rotates in conjunction with this operation, and the sensing unit 68A of the optical sensor 68 is rotated. Enter the light path again. At this time, the output signal of the optical sensor 68 changes from HIGH to LOW. The CPU 101 detects that the trailing edge of the thick paper has passed through the rotor 67 based on the change at this time. When the trailing edge of the thick paper is detected, the CPU 101 determines whether the trailing edge of the thick paper has reached the nip point of the conveying roller pair 35 (S60). Specifically, the transport amount of the thick paper after the trailing edge is detected is calculated based on a signal from the encoder 116 attached to the transport roller 35A or the transport motor 113, and the calculated value and the rotor 67 The distance to the point is compared, and if the calculated value matches the distance to the nip point, it is determined that the rear end of the cardboard has reached the nip point of the conveying roller pair 35.

  Subsequently, on the condition that the rear end position of the thick paper has reached the nip point of the transport roller pair 35, the CPU 101 stops the transport in a state where the rear end of the thick paper is sandwiched between the transport roller pair 35. In the meantime, the drive transmission path of the paper feeding motor 112 is switched from the path transmitting to the paper feeding roller 41 to the path transmitting to the cam drive mechanism 88, and then the paper feeding motor 112 is driven by a predetermined amount of rotation ( S61). Specifically, the switching method is performed, for example, by changing the position of the switching lever provided in the switching gear 114 using the carriage 23 or other movable members. As a result, the driving force of the paper feeding motor 112 is transmitted to the roller holder 74 via the cam driving mechanism 88, and the roller holder 74 moves from the third posture to the fourth posture. Thereby, the pressing roller 35B is separated from the conveying roller 35A.

  Thereafter, when the image recording is finished, the thick paper is discharged (S62). Subsequently, the roller holder 74 is moved from the fourth posture to the third posture (S63). Specifically, the cam shaft 90 is rotated 180 ° clockwise from the state of FIG. At this time, the detector 95 passes through the optical path of the optical sensor 93, changes the level of the output signal of the optical sensor 93 from HIGH to LOW, and again changes to HIGH. The CPU 101 grasps the position of the detector 95 based on the signal conversion at this time, and further determines the posture of the roller holder 74 interlocked with the detector 95 and the cam shaft 90. When the roller holder 74 moves from the fourth posture to the third posture, the transport roller 35A and the pressing roller 35B come into pressure contact again.

  Next, label recording processing for recording an image on a recording surface of a disk medium will be described based on the flowchart of FIG. Note that the description of processes that are substantially the same as those in the flowcharts of FIGS. 11 and 12 is simplified.

  First, in step S71 to step S73, the CPU 101 performs the same process as in step S21 to step S23 described above. Thereafter, the roller holder 74 is moved from the third posture to the fourth posture on condition that a label recording instruction is input from the operation panel 16 or an externally connected personal computer (S74).

  Subsequently, after an interrupt command is issued (S75), a process for taking in the disc tray is performed (S76). Specifically, when a user inputs a take-in instruction from the operation panel 16 or an externally connected personal computer after the disc tray is inserted from the opening 17 toward the second transport path 33, the transport motor 113 is turned on. The conveyance roller 35A and the discharge roller 36B are rotated in reverse. As a result, the disc tray is conveyed backward.

  When the disc tray is transported rearward and the loaded disc medium reaches the image recordable position, an interrupt release command is issued, and the interrupt process ends (S77).

  Thereafter, image recording is started on the label surface of the disk medium (S78). When the image recording is completed, the disc tray is ejected (S79), and then the roller holder 74 is moved from the fourth posture to the third posture (S80). As a result, the conveying roller 35A and the pressing roller 35B come into pressure contact again.

[Effect of the present invention]
As described above, in each image recording process in the multifunction machine 10, it can be determined whether the roller holder 74 is in the third posture or the fourth posture based on the change in the level of the output signal from the optical sensor 93. . When the detector 95 does not enter the optical path of the sensing unit 93A, it can be determined whether the cover 24 is in the first posture or the second posture in the interrupt process. For this reason, since it is not necessary to provide an optical sensor for each of a plurality of detection targets, it is possible to prevent an increase in cost, an increase in the number of parts, and an increase in the size of the apparatus caused by adding a new sensor.

  In this embodiment, an example in which the optical sensor 93 is used as an example of the sensor has been described. However, instead of the optical sensor 93, a reflective sensor, a magnetic sensor, a contact sensor, or the like can be used. is there. In the above-described embodiment, the example in which the paper feeding motor 112 is also used as the driving source of the roller holder 74 has been described. However, the single driving of a solenoid, a motor, or the like without using the paper feeding motor 112 is also described. The present invention is also applicable to a configuration in which the roller holder 74 is moved using a power source without switching drive transmission.

  In the above-described embodiment, the sensor arm 74 is configured to be retracted upward with respect to the optical sensor 93, but the sensor arm 74 is configured to be retracted below the optical sensor 93. It doesn't matter.

10. Multifunction machine (image recording device)
15: Printer unit 19: Recording paper (recording medium)
20: Recording unit 30 ... Conveying device 31 ... Conveying path (guide path)
35 ... Conveying roller pair 52 ... First detection mechanism 54 ... Detector 58 ... Torsion coil spring 67 ... Rotor 68 ... Optical sensor (sensor)
74: Roller holder (supporting member)
80 ... rotation restricting mechanism 81 ... regulating member 82 ... torsion coil spring 88 ... cam drive mechanism (moving mechanism)
94 ... Sensor arm (second detector)
95... Detector (first detector)
99: Second detection mechanism

Claims (4)

A guide route capable of guiding the recording medium;
A recording unit that records an image on a recording medium conveyed in the first feeding direction along the guide path;
A cover whose posture can be changed between a first posture that forms the guide route and a second posture that opens the guide route;
A pair of conveying rollers including a driving roller and a driven roller, which are provided upstream of the recording unit in the first feeding direction and arranged to face each other across the guide path;
A support member that pivotally supports the driven roller and is movable between a third posture in which the driven roller contacts the driving roller and a fourth posture in which the driven roller is separated from the driving roller;
A moving mechanism that receives the driving force from the driving source and moves the support member from the third posture to the fourth posture;
A sensor having a sensing unit;
A first detector that advances and retreats to a detectable position by the sensing unit according to the posture of the support member;
A second detector that moves back and forth to the detectable position according to the posture of the cover;
An image recording apparatus comprising: a control unit that determines an attitude of the support member and an attitude of the cover based on an output signal from the sensor. The first detector is rotatably provided so that the detected portion detected by the sensor passes through the detectable position, and the support member is in a fifth posture other than the third posture. Configured to enter the detectable position and retreat from the detectable position when in a position other than the fifth posture,
The second detector is provided to be rotatable between the detectable position and a retracted position above or below the detectable position, and the retracted position is set when the cover is in the first posture. 2. The image recording according to claim 1, wherein the image recording is configured to enter the detectable position when the cover is in the second posture and the first detector is retracted from the detectable position. apparatus. The support member supports the driven roller below the drive roller,
The moving mechanism is
A camshaft that is connected to the support member in the vertical direction and transmits a rotational force from the drive source;
A biasing member that resiliently biases the support member upward;
A cam fixed to the camshaft;
A cam receiving portion that is provided on the upper side of the cam shaft and presses the cam shaft downward in contact with the cam;
The image recording apparatus according to claim 2, wherein the first detector is fixed to the camshaft. The control unit
Determining the position of the support member based on a change in the output signal of the sensor when the first detector rotating together with the cam shaft enters the detectable position;
The image recording apparatus according to claim 3, wherein the attitude of the cover is determined based on a change in the sensor output signal after the first detector retracts the detectable position.

Images