JP2015193444A - Feeder and image recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of transmitting a drive force stably from a rotation shaft through a slide cam to a stopper for preventing a sheet from moving.SOLUTION: A device includes a feeding part 72 to feed a recording paper sheet S supported by a support part 189 in a feeding direction 87, a lower guide member 97 having a top face 69 to contact with and guide a tip of the recording paper sheet S and a recess 86 recessed from the top face 69, a contact member 117 having a face 121 that can come into contact with the tip of the recording paper sheet S, the contact member 117 being movable to a projection position where the face 121 projects from the recess 86 and to a burying position where the face 121 is buried into the recess 86, a slide member 116 to be driven by a rotation shaft 50 to be moved within the recess 86 in the feeding direction 87 to move the contact member 117 to the projection position, and moved within the recess 86 in a direction opposite to the feeding direction 87 to move the contact member 117 to the burying position, and a contact part 140 to come into contact with the rotation shaft 50 moving the slide member 116 such that the contact member 117 moves to the projection position.

Description

  The present invention relates to a feeding device that feeds a sheet supported by a support portion, and an image recording apparatus including the feeding device.

  2. Description of the Related Art Conventionally, a feeding device that has a support portion that supports a sheet and feeds the sheet supported by the support portion to an image recording apparatus or the like is known. Some of such feeding devices include a support portion that supports a sheet in which a plurality of sheets are stacked. In this case, the feeding roller comes into contact with the uppermost sheet among the sheets supported by the support portion, and feeds the uppermost sheet toward the destination (Patent Document 1).

Japanese Patent Laid-Open No. 10-139197

  In the feeding device as described above, when the support unit supports the sheet in an inclined state and the sheet is configured to be fed obliquely downward along the inclination direction, When the feeding roller is separated from the supported sheet, the sheet may move in the feeding direction.

  Therefore, it is conceivable to provide a stopper on the downstream side in the feeding direction of the sheet supported by the support portion. This stopper is a regulating position that regulates the movement of the sheet in the feeding direction by contacting the downstream end of the sheet in the feeding direction when the sheet is not fed, that is, in a state where the feeding roller is separated from the sheet. Located in. On the other hand, the stopper is located at a retracted position where it does not contact the downstream end of the sheet in the feeding direction in a state where the sheet is fed, that is, in a state where the feeding roller is in contact with the sheet. In other words, the stopper is configured to be movable between the restriction position and the retracted position.

  A slide cam that converts rotational motion into linear motion is used to transmit the drive from a motor that rotationally drives a feeding roller to the stopper and linearly move the stopper to a restriction position or a retracted position. In this drive transmission to the slide cam, if the rotating shaft bends or twists due to a load, the stopper does not reach the desired restricting position, and the function of restraining the seat by the stopper may not be sufficiently exhibited.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide means for stably transmitting power from a rotating shaft through a slide cam to a stopper for preventing sheet movement during non-feeding. There is to do.

  (1) A feeding device according to the present invention is supported by a sheet supporting unit that supports a sheet, a feeding unit that feeds a sheet supported by the sheet supporting unit in a feeding direction, and the sheet supporting unit. A sheet abutting surface for guiding the sheet by abutting against the downstream end of the sheet in the feeding direction, a guide portion having a recess recessed from the sheet abutting surface, and a guide support portion for supporting the guide portion And a stop surface capable of coming into contact with the front end of the sheet supported by the sheet support portion, and the stop surface protrudes from the recess of the guide portion and is supported by the sheet support portion. A projecting position that contacts and a stopper that is buried in the recess and movable to a buried position that is separated from the front end of the sheet supported by the sheet support portion, a drive source that rotates, a drive transmission from the drive source With rotating shaft The stopper is moved toward the protruding position by being driven and transmitted from the rotating shaft in the recess in the feeding direction, and the stopper is moved in the direction opposite to the feeding direction in the recess. A slide cam that moves the stopper toward the buried position and a side opposite to the feeding direction with respect to the rotating shaft, and the slide cam moves so that the stopper moves to the protruding position A contact portion that contacts the rotating shaft.

  When the drive shaft transmits the rotation and the rotating shaft rotates in one direction, the slide cam that moves in the feeding direction moves the stopper at the buried position to the protruding position. At this time, even if the rotating shaft starts to bend in the direction opposite to the feeding direction, the contact portion is prevented from coming into contact with the rotating shaft and the rotating shaft is bent in the opposite direction.

  (2) Preferably, the contact portion is provided integrally with the guide portion.

  Thereby, the relative positional relationship between the rotating shaft and the guide portion can be maintained, and the stopper can be accurately positioned at the predetermined protruding position by the slide cam.

  (3) Preferably, the contact portion extends from a side opposite to the feeding direction of the rotating shaft to the feeding direction side.

  When drive is transmitted from the drive source and the rotation shaft rotates in the other direction, the slide cam that moves in the direction opposite to the feeding direction moves the stopper at the protruding position to the buried position. At this time, even if the rotation shaft starts to bend in the feeding direction, the contact portion is prevented from coming into contact with the rotation shaft and the rotation shaft is bent in the feeding direction.

  (4) Preferably, the guide support portion includes bearing portions that respectively support both end sides of the rotating shaft, and the contact portion may be disposed between the bearing portions. Good.

  Thereby, it can suppress that a rotating shaft bends between bearing parts.

  (5) Preferably, the guide portion includes a separation portion that separates the sheet fed by the feeding portion on the sheet contact surface, and the stopper includes two portions sandwiching the separation portion. Is provided.

  Due to the two stoppers, the restraining force of the stopper can be applied evenly to the sheet supported by the sheet support portion.

  (6) Preferably, the contact portion is disposed between the separation portion and the stopper in a direction parallel to the axis of the rotation shaft.

  (7) Preferably, the feeding device is in contact with the slide cam, and is in contact with the slide cam, and a protrusion restricting portion that restricts the movement of the slide cam at a position where the stopper is in the protrusion position. A switch for restricting the movement of the slide cam at a position where the stopper becomes the buried position, and a switch for switching the presence or absence of drive transmission from the drive source to the rotary shaft. When the movement of the slide cam is restricted by the restricting portion, a torque limiter that cuts off the drive transmission from the drive source to the rotating shaft is further provided.

  As a result, even if the rotation shaft cannot be rotated due to the restriction of the movement of the slide cam, it is possible to continuously transmit drive from the drive source to a drive unit different from the rotation shaft.

  (8) The present invention includes the feeding device and a recording unit that is provided downstream of the guide unit in the feeding direction and records an image on the sheet fed by the feeding unit. It may be understood as an image recording apparatus provided.

  According to the present invention, the stopper can be positioned at a desired position by stably transmitting the drive from the rotary shaft to the stopper for preventing the movement of the sheet during non-feeding through the slide cam.

FIG. 1 is an external perspective view of the multifunction machine 10. FIG. 2 is a longitudinal sectional view showing the internal structure of the printer unit 11. FIG. 3 is a longitudinal sectional view schematically showing the internal structure of the printer unit 11. FIG. 4 is a perspective view showing the bypass tray 71 with the movable portion 186 lying down. FIG. 5 is a perspective view of the feeding device 70. 6A and 6B are cross-sectional views of the periphery of the moving member 64. FIG. 6A shows a state where the contact member 117 is in the buried position, and FIG. 6B shows a state where the contact member 117 is in the protruding position. It is shown. FIG. 7 is a cross-sectional view of the feeding device 70. FIG. 7A shows a state where the feeding roller 75 is in contact with the flat surface 45, and FIG. A separated state is shown. FIG. 8 is a perspective view of the lower guide member 97 and the lower cover 151. FIG. 9 is a perspective view of the lower guide member 97, the lower cover 151, the rotating shaft 50, and the moving member 64. FIG.

  Hereinafter, the multifunction peripheral 10 according to the embodiment of the present invention will be described. The embodiment described below is merely an example of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention. In the following description, the vertical direction 7 is defined with reference to the state in which the multifunction machine 10 is installed (the state shown in FIG. 1), and the side on which the opening 13 is provided is the front side (front side). A front-rear direction 8 is defined, and a left-right direction 9 is defined when the multifunction machine 10 is viewed from the front side (front side).

[Overall configuration of MFP 10]
As shown in FIG. 1, the multifunction machine 10 is generally formed in a rectangular parallelepiped, and includes a printer unit 11 that records an image on a sheet such as a recording sheet S (see FIG. 3) by an inkjet recording method. The multifunction machine 10 has various functions such as a facsimile function and a print function.

  The printer unit 11 includes a housing 14 having an opening 13 formed on the front surface. Further, a feed tray 20 and a discharge tray 21 that can accommodate recording paper S of various sizes can be inserted and removed in the front-rear direction 8 from the opening 13. The bottom surface of the housing 14 abuts on the placement surface on which the multifunction machine 10 is installed.

  As shown in FIG. 2, the printer unit 11 includes a feeding unit 15 that feeds the recording paper S from the feeding tray 20, a recording unit 24 that records an image on the recording paper S, a first transport roller pair 59, and A second conveyance roller pair 180 and the like are provided.

  As shown in FIG. 1, a scanner unit 12 is provided above the printer unit 11. The scanner unit 12 is a flat bed scanner. In addition, since the structure of a flat bed scanner is well-known, detailed description is abbreviate | omitted here.

[Printer 11]
Hereinafter, the detailed structure of the printer unit 11 will be described. The printer unit 11 is an example of an image recording apparatus.

[Feeding tray 20]
The feed tray 20 shown in FIGS. 1 and 2 has an outer shape in which the length in the front-rear direction 8 and the left-right direction 9 is longer than the length in the vertical direction 7, and has a box-like shape with an open upper surface. ing. A discharge tray 21 is provided on the front side of the upper surface of the feeding tray 20. The feeding tray 20 can accommodate the recording paper S by supporting the recording paper S of various sizes, such as an A4 size according to Japanese Industrial Standards and an L plate used for photographic recording, on a support surface. The feeding tray 20 is detachably mounted in an internal space that communicates with the opening 13 of the housing 14. The feeding tray 20 can advance and retreat along the front-rear direction 8 with respect to the housing 14 through the opening 13.

[Feeding unit 15]
As shown in FIG. 2, the feeding unit 15 includes a feeding roller 25, a feeding arm 26, and a drive transmission mechanism 27. The feeding unit 15 is provided above the feeding tray 20 and below the recording unit 24. The feed roller 25 is pivotally supported at the tip of the feed arm 26 so as to be rotatable. The feeding arm 26 rotates in the direction of an arrow 29 about a rotation shaft 28 provided at the base end. Thereby, the feed roller 25 can be brought into contact with and separated from the support surface of the feed tray 20. Therefore, when the recording paper S is accommodated and the feeding tray 20 is mounted in the housing 14, the feeding roller 25 can contact the recording paper S accommodated in the feeding tray 20.

  A driving force of a motor 78 (see FIG. 3), which will be described later, is transmitted to the feeding roller 25 through the drive transmission mechanism 27. The drive transmission mechanism 27 transmits the rotation transmitted to the rotation shaft 28 to the shaft of the feeding roller 25 by an endless belt. The feeding roller 25 rotates while being in contact with the uppermost recording paper S among the recording papers S supported on the support surface of the feeding tray 20, so that the recording paper S is conveyed along the transport path 65. To be sent to. The feed roller 25 may be driven and transmitted from a motor provided separately from the motor 78.

[Conveyance path 65]
As shown in FIG. 2, the conveyance path 65 provided in the internal space of the housing 14 extends in a curved manner so as to make a U-turn upward from the rear side of the feed tray 20, and further on the rear side of the printer unit 11. After being bent from the front side to the front side, it extends almost straight toward the front side and reaches the discharge tray 21. The conveyance path 65 is roughly divided into a curved path 65A that makes a U-turn and a straight path 65B that is straight.

  The curved path 65A is defined by the outer guide member 18, the inner guide member 19, the guide member 31, and the like facing each other with a space through which the recording paper S can pass. The straight path 65B is defined by the recording unit 24 and the platen 42 facing each other with a space through which the recording paper S can pass, the guide member 34, the guide member 33, and the like.

  The recording sheet S fed along the transport path 65 by the feed roller 25 of the feed tray 20 is reversed in the transport direction 17 (see FIG. 3) from below to above along the curved path 65A. The conveying direction 17 is conveyed from the rear to the front along the path 65B without being reversed.

[First conveyance roller pair 59 and second conveyance roller pair 180]
As shown in FIG. 2, a first transport roller pair 59 is provided on the upstream side of the recording unit 24 in the transport direction 17 of the recording paper S along the transport path 65. The first transport roller pair 59 includes a first transport roller 60 and a pinch roller 61. Similarly, a second conveyance roller pair 180 is provided on the downstream side of the recording unit 24 in the conveyance direction 17. The second transport roller pair 180 includes a second transport roller 62 and a spur roller 63.

  The first conveyance roller 60 and the second conveyance roller 62 are rotated by the rotation of a motor 78 (see FIG. 3) described later. The first conveyance roller pair 59 and the second conveyance roller pair 180 are rotated by the first conveyance roller 60 and the second conveyance roller 62 in a state where the recording paper S is sandwiched between the respective rollers constituting the first conveyance roller pair 59 and the second conveyance roller pair 180. The recording paper S is transported in the transport direction 17 along the transport path 65. The first transport roller 60 and the second transport roller 62 may be driven and transmitted from a motor provided separately from the motor 78.

[Recording unit 24]
As shown in FIG. 2, the recording unit 24 is provided between the first conveyance roller pair 59 and the second conveyance roller pair 180. The recording unit 24 is provided on the downstream side of a feeding direction 87 (see FIG. 3) to be described later than a lower guide member 97 to be described later. The recording unit 24 includes a carriage 40 and a recording head 39. The carriage 40 is supported by guide rails 43 and 44 provided on the rear side and the front side of the platen 42 so as to reciprocate in the left-right direction 9.

  The recording head 39 is mounted on the carriage 40. A plurality of nozzles 38 (see FIG. 3) are formed on the lower surface of the recording head 39. Ink is supplied to the recording head 39 from an ink cartridge (not shown). The recording head 39 selectively ejects ink from a plurality of nozzles 38 as fine ink droplets. When the carriage 40 is moving in the left-right direction 9, the nozzles 38 are applied to the recording paper S that is fed by the feeding unit 15 or a feeding unit 72 (see FIG. 3) described later and supported by the platen 42. Ink droplets are ejected from. The ejected ink droplets adhere to the recording paper S on the platen 42, whereby an image is recorded on the recording paper S.

[Bypass path 182]
As shown in FIG. 2, an opening 184 is provided on the rear surface of the housing 14. A bypass path 182 extending from the opening 184 to the first transport roller pair 59 is formed inside the housing 14. The bypass path 182 is a path that extends obliquely downward from the rear in the front-rear direction 8 to the front in the housing 14. The bypass path 182 is defined by the guide member 31 and the outer guide member 18. The conveyance path 65 is disposed below the bypass path 182.

  The recording paper S accommodated in a bypass tray 71 (see FIG. 3) described later is guided obliquely downward along the bypass path 182. The recording sheet S is guided along the straight path 65 B of the transport path 65 and is transported by the first transport roller pair 59. The recording sheet S is further subjected to image recording by the recording unit 24 and discharged to the discharge tray 21.

[Feeding device 70]
As shown in FIGS. 3, 5, 7, and 8, the printer unit 11 includes a feeding device 70. The feeding device 70 includes a bypass tray 71, a feeding unit 72, a lower guide member 97 (an example of the guide unit of the present invention), a contact member 117 (an example of the stopper of the present invention), and a motor 78 ( An example of a drive source of the present invention, a rotating shaft 50, a slide member 116 (an example of a slide cam of the present invention), and a contact portion 140 are provided.

[Bypass tray 71]
As shown in FIG. 1, the bypass tray 71 is provided on the rear side of the multifunction machine 10. The bypass tray 71 accommodates the recording paper S independently of the feeding tray 20.

  A fixing portion 185 (an example of the guide support portion of the present invention) that extends downward so as to cover the opening 184 (see FIG. 2) is provided on the rear surface side of the housing 14. The fixing portion 185 constitutes a part of the downstream side of the feed direction 87 (see FIG. 3) of the bypass tray 71. As shown in FIG. 4, a movable part 186 is provided above the fixed part 185 so as to be rotatable in the directions of arrows 80 and 82 with respect to the fixed part 185. A bypass tray 71 is constituted by the fixed portion 185 and the movable portion 186.

  As shown in FIG. 4, the fixing portion 185 is provided with a support member 189 having a support surface 188. The support surface 188 extends obliquely downward to the bypass path 182 (see FIG. 2).

  The movable part 186 is provided above the fixed part 185 so as to be rotatable with respect to the fixed part 185. The movable portion 186 is rotatable between a standing state standing along the vertical direction 7 as shown in FIG. 1 and a lying state inclined with respect to the vertical direction 7 as shown in FIG. .

  The standing state is a state for reducing the space for the movable portion 186 on the rear surface side of the housing 14 and is a state in which the bypass tray 71 is not used. The lying down state is a state in which the movable portion 186 is inclined obliquely upward toward the outside of the housing 14, and the bypass tray 71 can be used.

  Side walls 190 and 191 are provided on both sides of the movable portion 186 in the left-right direction 9. The side walls 190 and 191 cover part of both sides of the fixing portion 185 in the left-right direction 9. The drive transmission mechanism 79 provided on the right side of the fixed portion 185 in the left-right direction 9 is covered with the side wall 190 of the movable portion 186.

  As shown in FIG. 4, a support member 192 is provided across the side walls 190 and 191 of the movable portion 186. In the lying state, the support surface 193 provided on the upper surface of the support member 192 is substantially flush with the support surface 188. That is, in the bypass tray 71 in which the movable portion 186 is in a lying state, the flat surface 45 formed by the support surface 188 of the support member 189 and the support surface 193 of the support member 192 supports the recording paper S. That is, the support members 189 and 192 are an example of the sheet support portion of the present invention. Here, “substantially the same plane” means a plane on which the recording sheet S that is supported does not bend or bend even if there is a slight step between the two planes, that is, to be described later. This means a flat surface that supports the recording sheet S so that stable separation performance is exhibited by the separating portion 132 (see FIG. 5).

  As shown in FIG. 3, the flat surfaces 45 of the support members 189 and 192 support the leading end of the recording sheet S in the feeding direction 87 as the lower side in the gravity direction.

[Feeding unit 72]
As shown in FIG. 3, the feeding unit 72 includes a feeding roller 75, a feeding arm 76, a rotating member 30, and a drive transmission mechanism 79. The feed roller 75 and the feed arm 76 are disposed to face the flat surface 45 of the bypass tray 71. The feed roller 75 is rotatably supported at the tip of the feed arm 76. The feeding arm 76 rotates in the directions of arrows 67 and 68 around a rotation shaft 66 provided at the base end. Thereby, the feeding roller 75 can be brought into contact with and separated from the flat surface 45. Accordingly, when the recording paper S is stored in the bypass tray 71, the feeding roller 75 can contact the recording paper S and can be separated from the recording paper S.

  The rotation of the feeding arm 76 is realized by the rotating member 30 provided in the feeding unit 72. As shown in FIG. 7, the rotation member 30 rotates in the directions of the arrows 105 and 106 around the axis of the feed roller 75, so that the position shown in FIG. ). When the rotating member 30 is at the position shown in FIG. 7A, the feeding roller 75 is in contact with the flat surface 45 or the recording paper S supported by the flat surface 45. In this state, when the rotating member 30 rotates in the direction of the arrow 106, the feeding roller 75 is lifted by the rotating member 30 (see FIG. 7B). As a result, the feeding roller 75 is separated from the flat surface 45 or the recording paper S supported by the flat surface 45. The configuration for rotating the feeding arm 76 is not limited to the above-described configuration, and a known configuration can be employed.

  The driving force of the motor 78 is transmitted to the feed roller 75 through a drive transmission mechanism 79 described later. When the feeding roller 75 rotates while being in contact with the uppermost recording sheet S among the recording sheets S supported by the flat surface 45, the recording sheet S is fed toward the bypass path 182. 87. The recording sheet S is sent to the straight path 65 </ b> B through the bypass path 182, and an image is recorded by the recording unit 24.

[Lower guide member 97]
As shown in FIGS. 3 and 4, the lower guide member 97 is provided on the downstream side 87 in the feeding direction with respect to the support member 189 of the bypass tray 71. The lower guide member 97 is supported by the fixing portion 185 of the bypass tray 71. The lower guide member 97 may be supported by a member other than the fixing portion 185. For example, the lower guide member 97 may be supported by the side walls 190 and 191. In this case, the side walls 190 and 191 are an example of the guide support portion of the present invention.

  The upper surface 69 of the lower guide member 97 (an example of the sheet contact surface of the present invention) is inclined with respect to the support surface 188 (plane 45). The upper surface 69 is located at a height substantially equal to the opening 184 (see FIG. 2) in the vertical direction 7.

  When feeding of the recording sheet S in the feeding direction 87 is started by the feeding roller 75, the lower guide member 97 guides the leading end of the recording sheet S in contact along the upper surface 69. A separation portion 132 (see FIG. 5) having a plurality of teeth protruding upward from the upper surface 69 and arranged along the front-rear direction 8 is provided at the central portion of the upper surface 69 in the left-right direction 9. With these teeth, the leading ends of a plurality of recording sheets S supported by the bypass tray 71 are scratched. Even when the leading ends of the plurality of recording sheets S are guided along the upper surface 69 by the feeding roller 75, the separation unit 132 contacts the feeding roller 75 among the plurality of recording sheets S. The uppermost recording sheet S is separated from the other recording sheets S. As a result, the feeding roller 75 feeds only the uppermost recording sheet S toward the bypass path 182.

  As shown in FIG. 5, a pair of concave portions 86 extending along the front-rear direction 8 is provided on the upper surface 69. The concave portions 86 are respectively provided on the right side and the left side of the separating portion 132 in the left-right direction 9. In other words, the separation part 132 is disposed substantially at the center in the left-right direction 9 of the pair of recesses 86. A moving member 64 described later is disposed in the recess 86. As shown in FIG. 6, the recess 86 is defined by a bottom surface 84, a first side surface 122 (an example of an embedding restriction portion of the present invention), and a second side surface 123 (an example of a protrusion restriction portion of the present invention). .

[Drive transmission mechanism 79]
As shown in FIG. 3, the printer unit 11 is provided with a motor 78 that is driven to rotate in the forward and reverse directions. Further, as shown in FIGS. 3 and 5, a drive transmission mechanism 79 formed by engaging a plurality of gears is provided in the printer unit 11. However, in FIG. 3, the structure after the rotating shaft 50 in the 3rd drive transmission part 37 is abbreviate | omitted. In FIG. 5, the configuration after the gear 47A in the first drive transmission unit 35 is omitted. The rotational driving force generated when the motor 78 rotates forward and backward is transmitted to the feeding roller 75 and the moving member 64 via the drive transmission mechanism 79. Although not shown, the rotational driving force generated by the motor 78 is transmitted to the feed roller 25, the first transport roller 60, and the second transport roller 62.

  As shown in FIGS. 3 and 5, the drive transmission mechanism 79 includes a first drive transmission unit 35, a second drive transmission unit 36, a third drive transmission unit 37, and an intermediate gear 46.

  The first drive transmission unit 35 is disposed on the right side of the bypass tray 71 and the lower guide member 97. The first drive transmission unit 35 includes five gears 47A, 47B, 47C, 47D, and 47E. The four gears 47A, 47B, 47C, and 47D constitute a gear train that meshes with each other. The gear 47A disposed at one end of the gear train is transmitted from the motor 78 as shown in FIG.

  The gears 47D and 47E are disposed at the other end of the gear train. The gears 47D and 47E are arranged side by side in the thrust direction and rotate integrally around the same rotation axis. The gear 47D meshes with the gear 47C. The gear 47E meshes with the intermediate gear 46. As described above, the first drive transmission unit 35 transmits the rotational driving force from the motor 78 to the intermediate gear 46.

  The second drive transmission unit 36 includes five gears 48 </ b> A to 48 </ b> E, a roller gear 49, and a rotation shaft 66. The gears 48A and 48B mesh with each other. The rotation shaft 66 extends along the left-right direction 9. The gear 48A meshes with the intermediate gear 46. The gear 48 </ b> B is attached to the right end portion of the rotation shaft 66 and can rotate integrally with the rotation shaft 66.

  The gears 48C to 48E constitute a gear train meshed with each other. The gear 48 </ b> C disposed at one end of the gear train is attached to the left end portion of the rotation shaft 66 and rotates integrally with the rotation shaft 66. A gear 48 </ b> E disposed at the other end of the gear train meshes with a roller gear 49 that is coaxial with the feed roller 75 and rotates integrally with the feed roller 75. The gears 48D and 48E are rotatably supported by the feeding arm 76. As described above, the second drive transmission unit 36 transmits the rotational driving force from the intermediate gear 46 to the feeding roller 75.

  The third drive transmission unit 37 includes two gears 77 </ b> A and 77 </ b> B, a rotating shaft 50, and a protrusion 51 protruding from the rotating shaft 50. The rotation shaft 50 extends along the left-right direction 9 from the right side of the bypass tray 71 and the lower guide member 97 to the substantially central portion of the bypass tray 71 and the lower guide member 97 in the left-right direction 9. .

  The gears 77A and 77B constitute a gear train meshed with each other. A gear 77A disposed at one end of the gear train meshes with the intermediate gear 46. A gear 77B arranged at the other end of the gear train is connected to the right end portion of the rotating shaft 50 via a torque limiter 127 described later. Accordingly, the gear 77B can rotate integrally with the rotating shaft 50 and can rotate independently of the rotating shaft 50. That is, the rotating shaft 50 is driven by the motor 78 and rotates. As shown in FIGS. 5 and 6, the protrusion 51 protrudes toward the moving member 64. As described above, the third drive transmission unit 37 transmits the rotational driving force from the intermediate gear 46 to the moving member 64.

  The number of gears of the drive transmission mechanism 79 is not limited to the number shown in FIGS. Further, at least a part of the drive transmission mechanism 79 may be configured by other than a gear. For example, an endless belt may be stretched between two shafts, and the rotation of one shaft may be transmitted to the other shaft.

[Moving member 64]
As shown in FIG. 5, the moving member 64 is disposed in a recess 86 provided in the upper surface 69 of the lower guide member 97. Here, as described above, the recesses 86 are provided on the right side and the left side of the separation unit 132, respectively. That is, two moving members 64 are provided with the separation part 132 interposed therebetween.

  As shown in FIG. 6, the moving member 64 includes a slide member 116 and a contact member 117. The slide member 116 is supported on the bottom surface 84 of the recess 86. The abutting member 117 is supported by the slide member 116 and can abut on the leading end of the recording sheet S in the feeding direction 87 supported by the bypass tray 71.

  The slide member 116 is driven and transmitted from the rotary shaft 50 and can move in the recess 86 along the feed direction 87 along the bottom surface 84 of the recess 86. A first recess 118 and a second recess 119 are provided on the surface 120 of the slide member 116, that is, the surface 120 opposite to the surface of the slide member 116 that contacts the bottom surface 84 of the recess 86. The protrusion 51 of the third drive transmission unit 37 is inserted into the first recess 118. A protrusion 58 of a contact member 117 described later can be inserted into the second recess 119.

  The contact member 117 is in contact with the surface 120 of the slide member 116. The contact member 117 includes a protrusion 58 protruding toward the slide member 116 side. In contact with the movement of the slide member 116, the contact member 117 is protruded from the recess 86 (the position of the contact member 117 in the state shown in FIG. 6B) and buried in the recess 86. It can be moved to the buried position (the position of the contact member 117 in the state shown in FIG. 6A).

  This will be described in detail below. 6A, in the state where the slide member 116 is in contact with the first side surface 122 of the recess 86 of the lower guide member 97, the protrusion 58 of the contact member 117 is 2 is inserted into the recess 119. In this state, the contact member 117 is buried from the upper surface 69 into the recess 86, and is a buried position.

  In this state, when the rotation shaft 50 of the third drive transmission unit 37 rotates in the direction of the arrow 124, the slide member 116 is pushed by the protrusion 51 that rotates integrally with the rotating rotation shaft 50, and the second portion of the recess 86 is moved. 2 Move toward the feeding direction 87 toward the side surface 123. Thereby, the projection 58 inserted into the second recess 119 escapes from the second recess 119 and is supported by the surface 120 as shown in FIG. 6B. That is, the surface 120 of the slide member 116 constitutes a cam surface. As a result, the surface 121 of the abutting member 117 (an example of a stop surface of the present invention) protrudes from the upper surface 69 of the lower guide member 97. That is, the contact member 117 is in the protruding position. As described above, the slide member 116 moves the contact member 117 toward the protruding position by moving in the recess 86 in the feeding direction 87.

  Note that the slide member 116 can move until it abuts against the second side surface 123. That is, when the second side surface 123 abuts against the slide member 116 of the moving member 64, the movement of the slide member 116 is restricted at a position where the abutting member 117 becomes the protruding position.

  As shown in FIG. 6B, when the rotation shaft 50 rotates in the direction opposite to the arrow 124 in a state where the slide member 116 is in contact with the second side surface 123 and the contact member 117 is in the protruding position, the slide The member 116 is pushed by the protrusion 51 and moves in the direction opposite to the feeding direction 87 toward the first side surface 122 of the recess 86. As a result, the protrusion 58 is guided along the surface 120 and inserted into the second recess 119 as shown in FIG. As a result, the surface 121 of the contact member 117 is buried in the recess 86 from the upper surface 69 of the lower guide member 97. That is, the contact member 117 is a buried position. As described above, the slide member 116 moves the contact member 117 toward the buried position by moving in the recess 86 in the direction opposite to the feeding direction 87.

  The slide member 116 is movable until it contacts the first side surface 122. That is, when the first side surface 122 abuts against the slide member 116 of the moving member 64, the movement of the slide member 116 is restricted at a position where the abutment member 117 becomes the buried position.

  As shown in FIG. 6B, when the contact member 117 is in the protruding position, the leading end of the recording sheet S supported by the flat surface 45 of the support members 189 and 192 is in the feed direction 87 of the contact member 117. It can contact the surface 121. The surface 121 has a saw blade shape in a side view as viewed from the right or left, by forming grooves extending in the left-right direction 9 (perpendicular to the paper surface of FIG. 2) at regular intervals. Yes. As a result, the leading end of the recording sheet S that is in contact with the surface 121, that is, the downstream end of the recording sheet S in the feeding direction 87 is fitted into the groove. As a result, the movement of the recording paper S is stopped by the surface 121. Note that the surface 121 does not have to have a saw blade shape as long as the recording sheet S that is in contact can be stopped. For example, the surface 121 may be configured to stop the movement of the recording sheet S that has come into contact by attaching a cork or the like having a high friction coefficient.

  On the other hand, the contact member 117 is separated from the leading end of the feeding direction 87 of the recording sheet S supported by the flat surface 45 of the support members 189 and 192 by being buried in the recess 86 at the buried position.

[Torque limiter 127]
As shown in FIG. 5, a torque limiter 127 is provided between the gear 77 </ b> B of the third drive transmission unit 37 and the rotation shaft 50. The torque limiter 127 switches presence / absence of drive transmission from the motor 78 to the rotary shaft 50 by switching presence / absence of rotation drive force transmission in the third drive transmission unit 37.

  The torque limiter 127 includes a flange portion 128, a friction member (not shown), and a compression coil spring (not shown). The flange portion 128 protrudes from the peripheral surface of the rotating shaft 50. The friction member is disposed between the flange portion 128 and the gear 77B in the axial direction of the rotation shaft 50. The compression coil spring is disposed on the opposite side of the friction member with respect to the gear 77B in the axial direction of the rotating shaft 50, and biases the gear 77B toward the friction member. The gear 77B is pressed against the flange portion 128 via the friction member by being biased by the compression coil spring. Note that the configuration of the torque limiter 127 is not limited to the configuration described above, and any configuration of the torque limiter can be employed.

  In the operation of the moving member 64 described above, when the slide member 116 is in a movable state, the torque limiter 127 transmits the rotational driving force from the gear 77B to the flange portion 128 via the friction member. That is, the gear 77 </ b> B and the rotating shaft 50 provided with the flange portion 128 rotate together via the torque limiter 127.

  On the other hand, in the operation of the moving member 64 described above, when the slide member 116 that moves toward the first side surface 122 abuts on the first side surface 122, or the slide member 116 that moves toward the second side surface 123 When contacting the two side surfaces 123, the torque limiter 127 cuts off the transmission of the rotational driving force from the gear 77B to the rotating shaft 50. That is, since the rotation of the rotation shaft 50 is restricted by the contact of the slide member 116 with the first side surface 122 or the second side surface 123, the rotation of the rotation shaft 50 stops and the gear 77B rotates idly with respect to the rotation shaft 50. . That is, the gear 77B rotates independently of the rotation shaft 50. From the above, when the movement of the moving member 64 is restricted by the first side surface 122 or the second side surface 123, the torque limiter 127 cuts off the transmission of the rotational driving force in the third drive transmission unit 37.

  The position where the torque limiter 127 is provided is not limited to between the gear 77B and the rotating shaft 50. For example, the torque limiter 127 may be provided between the gear 77A and the rotation shaft of the gear 77A.

[Bearing part 150]
As shown in FIG. 8, the fixing portion 185 of the bypass tray 71 includes a bearing portion 150. As will be described in detail below, the bearing unit 150 rotatably supports the left and right ends of the rotating shaft 50.

  The bearing 150 is provided on the lower cover 151. As shown in FIG. 4, the lower cover 151 supports the support member 189 from below. In the support member 189, the bearing portion 150 is disposed at a position corresponding to the vicinity of the upstream end of the feeding direction 87 of the lower cover 151. The bearing unit 150 is provided in a pair spaced apart in the left-right direction 9. The arrangement of the bearing portion 150 in the left-right direction 9 corresponds to the right end portion and the left end portion of the rotating shaft 50. In addition, in FIG. 8, the bearing part 150 of the position corresponding to the right end part of the rotating shaft 50 is hidden and cannot be seen. The bearing portion 150 protrudes upward from the lower cover 151, and an opening 152 penetrating in the left-right direction 9 is formed on the protruding end side (upper side). As shown in FIG. 9, the rotary shaft 50 is inserted into the opening 152 and is rotatably supported.

  The bearing portion 150 may be provided on a member other than the fixed portion 185, for example, a frame (not shown) constituting the housing 14. Moreover, the bearing part 150 is not restricted to a pair, For example, three or more may be provided.

[Abutment 140]
As shown in FIG. 8, the lower guide member 97 includes two abutting portions 140. The two contact portions 140 are separated from each other in the left-right direction 9 and are integrally formed with the lower guide member 97.

  The two contact portions 140 are disposed between the two bearing portions 150. In the left-right direction 9, one of the two contact portions 140 is the left-side recess 86 of the separation portion 132 and the pair of recesses 86 (specifically, the contact member 117 (see FIG. 9) disposed in the recess 86). It is arranged between. The other of the two contact portions 140 is disposed between the separation portion 132 and the right-side recess 86 of the pair of recesses 86 (specifically, the contact member 117 (see FIG. 9) disposed in the recess 86). Has been.

  The contact portion 140 is provided at an upstream end portion of the lower guide member 97 in the feeding direction 87 and is erected upward from the upper surface 69. On the upper side of the contact portion 140, a first contact portion 141 provided on the side opposite to the feeding direction 87 with respect to the rotating shaft 50, and provided on the feeding direction 87 side with respect to the rotating shaft 50. A second contact portion 142 is formed. The first contact portion 141 and the second contact portion 142 are connected along the front-rear direction 8. That is, the contact portion 140 extends from the first contact portion 141 provided on the opposite side of the feeding direction 87 of the rotating shaft 50 to the second contact portion 142 provided on the feeding direction 87 side. Yes.

  As shown in FIG. 9, the rotation shaft 50 supported by the bearing portion 150 is located between the first contact portion 141 and the second contact portion 142. The first contact portion 141 and the rotation shaft 50 are spaced apart from each other along the feeding direction 87. That is, the first contact portion 141 is not in contact with the stationary rotating shaft 50. The interval between the first contact portion 141 and the rotary shaft 50 is set to such an extent that the amount of deflection of the rotary shaft 50 is allowed when the rotating rotary shaft 50 is bent upstream of the feeding direction 87. ing. Here, “the extent to which the bending amount of the rotating shaft 50 is allowed” set at the interval between the first contact portion 141 and the rotating shaft 50 means that the rotating shaft 50 bends in driving transmission to the slide member 116. The degree to which the restraining function of the recording paper S by the contact member 117 is sufficiently exerted even if it is twisted or twisted. The bending of the rotary shaft 50 is caused when the projection 51 pushes the slide member 116 in the feeding direction 87 (when the slide member 116 moves the contact member 117 in the buried position to the protruding position), the slide member 116 moves to the projection 51. This is caused by the reaction of the applied force.

  The second contact portion 142 and the rotary shaft 50 are spaced apart from each other along the feeding direction 87. That is, the second contact portion 142 is not in contact with the stationary rotating shaft 50. The interval between the second contact portion 142 and the rotating shaft 50 is set to an extent that the amount of bending of the rotating shaft 50 is allowed when the rotating rotating shaft 50 is bent downstream of the feeding direction 87. ing. Here, “the extent to which the bending amount of the rotating shaft 50 is allowed” set at the interval between the second contact portion 142 and the rotating shaft 50 means that the rotating shaft 50 bends in driving transmission to the slide member 116. The degree to which the surface 121 of the contact member 117 is completely buried in the recess 86 and does not hinder the conveyance of the recording paper S even if it is twisted or twisted. The bending of the rotary shaft 50 is caused when the projection 51 pushes the slide member 116 in the direction opposite to the feeding direction 87 (when the slide member 116 moves the contact member 117 at the protruding position to the buried position). This is caused by the reaction of the force applied to the protrusion 51. From the above, it is desirable that the contact portion 140 is provided in the vicinity of the protrusion 51 of the rotating shaft 50.

  Note that the contact portion 140 is not necessarily formed integrally with the lower guide member 97. For example, the contact portion 140 may be a member that is separate from the lower guide member 97 and is fixed to the lower guide member 97.

  Further, the abutting portion 140 may be disposed in a position other than between the separating portion 132 and the recessed portion 86 in the left-right direction 9, for example, between the left recessed portion 86 and the bearing portion 150.

  Further, the first contact portion 141 and the second contact portion 142 may be disposed in contact with the rotation shaft 50 without leaving a gap in the feeding direction 87 with respect to the rotation shaft 50. That is, the first contact portion 141 and the second contact portion 142 may be in contact with the rotating shaft 50 that is stationary. Further, the contact part 140 may include only the first contact part 141 without including the second contact part 142. When the slide member 116 is moved in the direction of lifting the contact member 117 from the buried position to the projecting position, the rotation axis is larger than when the slide member 116 is moved in the direction of lowering the contact member 117 from the projecting position to the buried position. This is because the load applied to 50 is large.

[Effects of Embodiment]
According to the present embodiment, when the drive shaft is transmitted from the motor 78 and the rotary shaft 50 rotates in one direction (the direction of the arrow 124), the slide member 116 that moves in the feeding direction 87 protrudes from the contact member 117 at the buried position. Move to position. At this time, even if the rotation shaft 50 starts to bend in the direction opposite to the feeding direction 87, the first contact portion 141 of the contact portion 140 contacts the rotation shaft 50 and the rotation shaft 50 bends in the opposite direction. Suppress. As a result, the contact member 117 for preventing the movement of the recording paper S during non-feeding is stably transmitted from the rotary shaft 50 through the slide member 116 to position the contact member 117 to a desired position. It can be shown.

  In addition, according to the present embodiment, since the contact portion 140 is provided integrally with the lower guide member 97, the relative positional relationship between the rotating shaft 50 and the lower guide member 97 is maintained, and the slide is performed. The contact member 117 can be accurately positioned at a predetermined protruding position by the member 116.

  Further, according to the present embodiment, since the contact portion 140 includes the second contact portion 142, the drive shaft is transmitted from the motor 78 and the rotation shaft 50 rotates in the other direction (opposite the direction of the arrow 124). Then, the slide member 116 that moves in the direction opposite to the feeding direction 87 moves the contact member 117 at the protruding position to the buried position. At this time, even if the rotation shaft 50 starts to bend in the feeding direction 87, the second contact portion 142 is prevented from coming into contact with the rotation shaft 50 and the rotation shaft 50 is prevented from being bent in the feeding direction 87.

  Moreover, according to this embodiment, since the contact part 140 is arrange | positioned between the bearing parts 150, it can suppress that the rotating shaft 50 bends between the bearing parts 150. FIG.

  Further, according to the present embodiment, since the two abutting members 117 are provided with the separation portion 132 interposed therebetween, the two abutting members 117 support the recording paper S supported by the support members 189 and 192. Therefore, the restraining force of the contact member 117 can be applied evenly.

  In addition, according to the present embodiment, since the feeding device includes the torque limiter 127, even if the rotation shaft 50 becomes unable to rotate due to the restriction of the movement of the slide member 116, it is different from the rotation shaft 50. Drive can be continuously transmitted from the motor 78 to the drive unit.

[Modification]
In the above-described embodiment, the feeding device 70 is a device that feeds the recording paper S supported on the flat surface 45 of the bypass tray 71, but the feeding device 70 is a tray other than the flat surface 45 of the bypass tray 71. An apparatus for feeding the recording paper S supported by the printer may be used. For example, the feeding device 70 may be a device for feeding the recording paper S supported by the feeding tray 20.

  In the above-described embodiment, the feeding device 70 is provided in the printer unit 11. However, the device including the feeding device 70 is not limited to the printer unit 11. For example, the feeding device 70 may be provided in the scanner unit 12. In this case, the feeding device 70 feeds a sheet whose image is read by the scanner unit 12 into the scanner unit 12.

DESCRIPTION OF SYMBOLS 10 ... Multi-function device 50 ... Rotating shaft 69 ... Upper surface 72 ... Feeding part 78 ... Motor 87 ... Feeding direction 116 ... Slide member 117 ... Contact member 121 ... Surface 140 ... Contact part 185 ... Fixing part 189 ... Support member 192 ... Support member

Claims (8)

A sheet support part for supporting the sheet;
A feeding unit that feeds the sheet supported by the sheet supporting unit in a feeding direction;
A sheet abutting surface that guides the sheet by contacting the downstream end of the sheet supported by the sheet supporting portion, and a guide portion having a recess recessed from the sheet abutting surface;
A guide support part for supporting the guide part;
It has a stop surface that can come into contact with the front end of the sheet supported by the sheet support portion, and the stop surface protrudes from the concave portion of the guide portion and comes into contact with the front end of the sheet supported by the sheet support portion. A stopper that can be moved to a protruding position and a buried position that is buried in the concave portion and is separated from the front end of the sheet supported by the sheet supporting portion;
A drive source for rotational driving;
A rotating shaft that is rotated by driving transmission from the driving source;
The stopper is moved toward the protruding position by being driven and transmitted from the rotating shaft in the recess in the feeding direction, and the stopper is moved in the direction opposite to the feeding direction in the recess. A slide cam for moving the stopper toward the buried position;
An abutting portion that is disposed on the opposite side of the feeding direction with respect to the rotating shaft, and that contacts the rotating shaft that moves the slide cam so that the stopper moves to the protruding position; A feeding device comprising:   The feeding device according to claim 1, wherein the contact portion is provided integrally with the guide portion.   The feeding device according to claim 1, wherein the contact portion extends from a side opposite to the feeding direction of the rotating shaft to the feeding direction side. The guide support part has bearing parts for supporting both end sides of the rotating shaft,
The feeding device according to any one of claims 1 to 3, wherein the contact portion is disposed between the bearing portions. The guide unit includes a separation unit that separates the sheet fed by the feeding unit on the sheet contact surface,
The feeding device according to any one of claims 1 to 4, wherein two stoppers are provided with the separation portion interposed therebetween.   The feeding device according to claim 5, wherein the contact portion is disposed between the separation portion and the stopper in a direction parallel to the axis of the rotation shaft. A protrusion restricting portion that contacts the slide cam and restricts the movement of the slide cam at a position where the stopper becomes the protruding position;
An embedment restricting portion that contacts the slide cam and restricts the movement of the slide cam at a position where the stopper becomes the embedment position;
When the movement of the slide cam is restricted by the protrusion restricting portion or the burying restricting portion, the drive from the drive source to the rotating shaft is switched. The feeding device according to claim 1, further comprising: a torque limiter that cuts off transmission. A feeding device according to any one of claims 1 to 7,
An image recording apparatus comprising: a recording unit that is provided downstream of the guide unit in the feeding direction and records an image on a sheet fed by the feeding unit.

Images