JP2020033174A - Sheet conveyance device and image recording apparatus - Google Patents

Abstract

To provide a sheet conveyance device which can minimize the separation of rollers of a roller pair and can regulate the movement amount of the rollers at the time of the separation with a simple configuration.SOLUTION: A compound machine 10 includes: a first roller 91 and a second roller 92 which are located in a conveyance path 65 of sheets and face each other; a roller holder 87 which rotatably supports the second roller 92; a torsion coil spring 88; and a guide member 85 which can rotate between the close position constituting the conveyance path 65 and the open position for exposing the conveyance path 65 and the roller holder 87 to the outside on the opposite side to the first roller 91 with respect to the second roller 92. The roller holder 87 can move between the first position where the second roller 92 contacts the first roller 91 and the second position where the second roller 92 is apart from the first roller 91 and the movement away from the first position is regulated with the contact to the guide member 85 at the open position. The torsion coil spring 88 biases the roller holder 87 toward the first position.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a sheet conveying device that conveys a sheet, and an image recording device that includes the sheet conveying device and records an image on a sheet.

  The sheet conveying device includes a pair of rollers for conveying a sheet along a conveying path. One of the rollers forming the roller pair is urged to the other of the rollers forming the roller pair by an urging member such as a spring. The roller pair conveys the sheet while nipping it.

  Further, the sheet conveying device includes a guide member that forms a conveying path. The guide member guides the sheet on the conveyance path. Some of the guide members are movable to a closed position that forms the transport path and an open position that opens the transport path. When a sheet is jammed inside the sheet conveying device, the jammed sheet can be taken out by setting the guide member to the open position. At this time, if the rollers constituting the roller pair are separated from each other, it becomes easy to remove the jammed sheet. Patent Document 1 discloses a sheet conveying device having a structure in which rollers constituting a roller pair move so as to be separated from each other in conjunction with movement of a guide member from a closed position to an open position.

JP-A-7-125868

  When the rollers that make up the roller pair move away from each other, a force that opposes the urging force acts on the urging member that urges one of the rollers toward the other. Therefore, if the rollers forming the roller pair are separated a large number of times, the elastic members of the urging members will be reduced in performance, such as reduced elasticity and wear. In the sheet conveying device disclosed in Patent Literature 1, when the guide member moves to the open position, the rollers constituting the roller pair always separate from each other. Therefore, the performance of the biasing member is likely to be reduced. In order to suppress the performance degradation of the urging member, it is desirable that the separation of the rollers constituting the roller pair be minimized.

  Further, in the sheet conveying device disclosed in Patent Document 1, a notch is formed in a frame, and a shaft of the roller is moved in the notch, thereby restricting a moving amount of the roller at the time of separation. . However, since it is necessary to form a notch in the frame or extend the axis of the roller to the notch, the structure becomes complicated and a lot of space is required.

  The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to minimize the necessary separation of the rollers constituting the roller pair, and to reduce the amount of movement of the rollers during the separation. It is an object of the present invention to provide a sheet conveying device capable of performing regulation with a simple configuration.

  (1) A sheet conveying apparatus according to the present invention includes a main body having a conveying path through which a sheet passes, a first roller positioned on the conveying path, a second roller facing the first roller, and a second roller. A roller holder rotatably supporting, a biasing member for biasing the roller holder, and the second roller is rotatably supported by the main body on a side opposite to the first roller, A guide member rotatable to a closed position configuring the transport path and an open position exposing the transport path and the roller holder to the outside; The roller holder has a first position at which the second roller contacts the first roller, and the second roller is separated from the first roller, and contacts the guide member at the open position. And the second position where movement away from the first position is restricted. The urging member urges the roller holder toward the first position.

  According to this configuration, the roller holder is exposed to the outside by rotating the guide member from the closed position to the open position. Here, according to this configuration, the rotation of the guide member and the movement of the roller holder can be individually performed. Therefore, even if the guide member is rotated, the roller holder does not move. Thus, unnecessary movement of the roller holder can be prevented, so that performance degradation of the urging member can be reduced.

  Further, according to this configuration, the movement of the roller holder is restricted to the second position by contacting the guide member in the open position. That is, according to the present configuration, it is not necessary to add another member or complicate the structure for the restriction, so that the movement of the roller holder can be restricted with a simple configuration.

  (2) Among the guide members, the volume located in the space provided on the side opposite to the first roller with respect to the roller holder in the main body is larger at the closed position than at the open position. Is smaller.

  In this configuration, the volume of the portion where the guide member at the open position is located in the space is the volume obtained by adding an additional portion to the portion where the guide member at the closed position is located in the space. For this reason, a member for contacting the roller holder and restricting the movement of the roller holder cannot be arranged in this additional portion. However, in this configuration, even if the member is not arranged in this additional portion, the guide member in the open position located in this additional portion can contact the roller holder in the second position to restrict the movement of the roller holder. it can.

  (3) The guide member is movable in an elliptical bearing in which the rotation axis of the guide member is supported by the rotation axis.

  According to this configuration, the guide member can be rotated and slid by moving the rotation shaft of the guide member in the bearing. Thus, it is possible to prevent the guide member from being caught by another member during rotation.

  (4) The main body includes a contact portion that contacts the guide member at the open position. The contact portion in contact with the guide member in the open position restricts movement of the bearing with respect to the rotation shaft.

  According to this configuration, it is possible to prevent unintended movement of the guide member due to movement of the rotation shaft in the bearing.

  (5) The main body includes a contact portion that contacts the guide member at the open position. The abutting portion abuts on the guide member between a rotation shaft of the guide member and a distal end. A portion of the guide member from the contact position with the contact portion to the distal end is heavier than a portion of the guide member from the contact position to the rotation shaft. The guide member is in contact with the roller holder at the second position on a side opposite to the distal end with respect to the contact position.

  According to this configuration, the portion of the guide member from the contact position to the tip is heavier than the portion of the guide member from the contact position to the rotation axis. Further, according to this configuration, the roller holder at the second position comes into contact with the guide member on the side opposite to the leading end with respect to the contact position. Therefore, even if a force acts on the guide member due to the roller holder at the second position abutting on the guide member, the guide member is unlikely to rotate. That is, the possibility that the guide member rotates unintentionally can be reduced.

  (6) The guide member includes a first rib capable of guiding a sheet at the closed position, and a second rib abutting on the roller holder at the open position. In a state where the guide member is located at the closed position, the first rib is located at a position downstream of the second roller in the sheet conveying direction, and the second rib is located in the sheet conveying direction more than the first rib. It is located upstream and on the opposite side of the transport path with respect to the roller holder.

  According to this configuration, when the guide member is at the closed position, it is possible to prevent the second rib from being positioned in the transport path and hindering the transport of the sheet.

  (7) For example, the roller holder can be moved to the first position and the second position by rotating.

  (8) The rotation axis of the roller holder is located upstream of the second roller in the sheet conveyance direction. The roller holder extends from the second roller to a downstream side in the transport direction.

  According to this configuration, the roller holder can be easily rotated by gripping a portion of the roller holder that extends downstream from the second roller in the transport direction.

  (9) The bearing for the rotation shaft of the roller holder has an open portion that is partially open in the circumferential direction. The rotation shaft of the roller holder can be fitted to the bearing via the opening.

  According to this configuration, the roller holder can be easily attached to the main body. Further, since the rotating shaft is fitted to the bearing, the roller holder can be positioned. As a result, the nip accuracy of the second roller with respect to the first roller can be favorably maintained.

  (10) For example, the guide member in the closed position forms a part of an outer wall of the main body.

  (11) The present invention can also be regarded as an image recording apparatus including the sheet transport device, and a recording unit that records an image on a sheet in the transport path.

  ADVANTAGE OF THE INVENTION According to this invention, separation of the roller which comprises a roller pair can be made into the minimum necessary, and the regulation of the movement amount of the roller at the time of the said separation can be performed with a simple structure.

FIG. 1 is a perspective view of the multifunction peripheral 10 with the guide member 85 in the closed position. FIG. 2 is a sectional view showing an AA section of FIG. FIG. 3 is a perspective view of the MFP 10 with the guide member 85 in the open position. FIG. 4 is a sectional view showing a BB section of FIG. FIG. 5 is a cross-sectional view showing a cross section taken along line CC of FIG. FIG. 6 is a cross-sectional view showing a cross section taken along the line CC of FIG. FIG. 7 is a sectional view showing an AA section of FIG. FIG. 8 is a sectional view showing a DD section of FIG. FIG. 9 is a sectional view showing an EE section of FIG.

  Hereinafter, embodiments of the present invention will be described. The embodiment described below is merely an example of the present invention, and it goes without saying that the embodiment of the present invention can be appropriately changed without changing the gist of the present invention. In the following description, the up-down direction 7 is defined based on a state in which the multifunction peripheral 10 is installed so as to be usable (the state in FIG. 1), and the front-rear direction 8 is defined with the surface on which the guide member 85 is provided as the rear surface. The left-right direction 9 is defined when the MFP 10 is viewed from the front to the rear. The up-down direction 7, the front-back direction 8, and the left-right direction 9 are orthogonal to each other. In the present embodiment, the vertical direction 7 corresponds to the vertical direction, and the front-back direction 8 and the left-right direction 9 correspond to the horizontal direction.

[Overall Structure of MFP 10]
As shown in FIG. 1, the multifunction peripheral 10 (an example of an image recording apparatus) is formed in a substantially rectangular parallelepiped. The multifunction peripheral 10 has various functions such as a facsimile function and a print function. The multifunction peripheral 10 has a function of recording an image on a sheet such as paper as a print function.

  As shown in FIG. 2, the multifunction peripheral 10 includes a sheet conveying device and a recording unit 24. The sheet conveying device includes a housing 14 (an example of a main body), feeding trays 131, 132, and 133, a discharging tray 21, a feeding unit 141 (see FIG. 4), a guide member 71 (see FIG. 5), and a conveying roller pair 57. , A discharge roller pair 58, an intermediate roller pair 86 (see FIG. 5), a torsion coil spring 88 (an example of an urging member, see FIG. 5), a roller holder 87 (see FIG. 5), and a guide member 85.

  The housing 14 shown in FIG. 1 constitutes the appearance of the multifunction device 10. As shown in FIG. 2, an opening 13 is formed on the front surface of the housing 14. The recording unit 24, the feeding unit 141, the guide member 71, the pair of conveying rollers 57, the pair of discharge rollers 58, the pair of intermediate rollers 86, the torsion coil spring 88, and the roller holder 87 are arranged inside the housing 14. A transport path 65 through which a sheet is transported is formed inside the housing 14. The transport path 65 is indicated by a chain line in FIG.

  The feed trays 131, 132, and 133 are attached to the housing 14 by being inserted rearward through the opening 13 into the housing 14, and are pulled out of the housing 14 through the opening 13. The discharge tray 21 is supported by the feed tray 133. The guide member 85 is rotatably supported by the housing 14 (see FIGS. 1 and 3).

  Each of the feed trays 131, 132, and 133 is formed in a substantially rectangular parallelepiped box shape whose upper side is opened. Each of the feed trays 131, 132, and 133 includes a bottom plate 76 that is supported in a state where a plurality of sheets are stacked.

  When the feed trays 131, 132, and 133 are mounted on the housing 14, the feed tray 133 is located above the feed tray 132, and the feed tray 132 is located above the feed tray 131. ing.

  The feeding unit 141 shown in FIG. 4 is provided corresponding to each of the feeding trays 131, 132, and 133. The feeding unit 141 illustrated in FIG. 4 corresponds to the feeding tray 133. Each feeding unit 141 is located above the bottom plate 76 of each of the feeding trays 131, 132, and 133. Each feed unit 141 feeds the paper supported on the bottom plate 76 of each of the feed trays 131, 132, and 133 to the transport path 65 located at the rear.

  Since the structure of each feeding unit 141 corresponding to each of the feeding trays 131, 132, and 133 is the same, hereinafter, the feeding unit 141 (the feeding unit 141 corresponding to the feeding tray 133) shown in FIG. The configuration will be described. As shown in FIG. 4, the feeding unit 141 includes a feeding roller 25, an arm 26, and a shaft (not shown).

  The feed roller 25 is rotatably supported at the tip of the arm 26. The feed roller 25 is rotated by receiving a driving force from a motor (not shown). The base end of the arm 26 is rotatably supported by a shaft. The shaft is supported by the frame 23 of the multifunction peripheral 10. The arm 26 is rotationally biased toward the bottom plate 76 by its own weight or an elastic force of a spring or the like. The feed roller 25 rotates while being in contact with the sheet supported by the bottom plate 76, thereby picking up the uppermost sheet supported by the bottom plate 76 and feeding it to the transport path 65.

  The sheet fed to the conveyance path 65 is conveyed in the conveyance path 65 in the conveyance direction 16 indicated by the dashed line arrow in FIG. When the downstream end in the transport direction 16 of the paper transported in the transport path 65 reaches the transport roller pair 57, the paper is transported by the transport roller pair 57 in the transport direction 16 toward the recording unit 24 along the transport path 65. The sheet that has arrived immediately below the recording unit 24 is image-recorded by the recording unit 24.

  As shown in FIG. 5, the guide member 71 is located behind the rear end of each of the feed trays 131, 132, and 133 mounted on the housing 14. Since the configuration of each guide member 71 corresponding to each of the feed trays 131, 132, and 133 is the same, the configuration of the guide member 71 corresponding to the feed tray 131 will be described below.

  The guide member 71 has an inclined surface 73 facing forward. The inclined surface 73 is inclined with respect to the upper surface of the bottom plate 76. The inclined surface 73 is inclined upward toward the rear. The lower end of the inclined surface 73 is close to the rear end of the feed tray 131 mounted on the housing 14. The inclined surface 73 is in contact with the sheet sent backward by the feed roller 25. Thus, the sheet is sent to the conveyance path 65 while being guided by the inclined surface 73 and changing its direction from the rear to the upper side.

  As shown in FIG. 2, the transport path 65 extends substantially upward from the rear end of the feed tray 131, passes through the rear surface of the guide member 71 corresponding to the feed tray 132, and corresponds to the feed tray 133. And reaches the rear surface of the guide member 71. The transport path 65 is curved forward from above the rear surface of the guide member 71 corresponding to the feed tray 133. The transport path 65 extends substantially forward from the curved position to above the discharge tray 21 via the transport roller pair 57, the recording unit 24, and the discharge roller pair 58. In other words, the transport path 65 includes a portion extending substantially upward and a portion located downstream of the portion in the transport direction 16 and extending substantially forward.

  The transport roller pair 57 includes a transport roller 60 and a pinch roller (not shown) facing each other. The transport roller 60 is rotated by being transmitted from a motor (not shown). Note that the motor may be the same as or different from the motor that rotates the feed roller 25. The pinch roller rotates with the rotation of the transport roller 60. The transport roller pair 57 sandwiches the paper and transports the paper in the transport direction 16.

  The discharge roller pair 58 is located downstream of the transport roller pair 57 in the transport direction 16 in the transport path 65. The discharge roller pair 58 includes a discharge roller 62 and a spur (not shown) facing each other. The discharge roller 62 is driven by a motor (not shown) and rotates. Note that the motor may be the same as or different from the motor that rotates the feed roller 25 and the motor that rotates the transport roller 60. The spur rotates with the rotation of the discharge roller 62. The discharge roller pair 58 sandwiches the sheet and transports the sheet in the transport direction 16. The sheet transported in the transport direction 16 by the discharge roller pair 58 is discharged to the discharge tray 21.

  The recording unit 24 is located between the pair of transport rollers 57 and the pair of discharge rollers 58 in the transport path 65. In the present embodiment, the recording unit 24 records an image on a sheet that is transported along the transport path 65 by an inkjet method. The method by which the recording unit 24 records an image on a sheet is not limited to the ink jet method, but may be another method such as an electrophotographic method.

[Intermediate roller pair 86]
As shown in FIG. 5, the intermediate roller pair 86 is located above the upper end of the guide member 71 corresponding to the feed tray 131 in the transport path 65 and is located above the upper end of the guide member 71 corresponding to the feed tray 132. It is located below. The intermediate roller pair 86 sandwiches the paper and transports the paper in the transport direction 16.

  The intermediate roller pair 86 includes a first roller 91 and a second roller 92 facing each other.

  As shown in FIG. 4, the first roller 91 includes a shaft 911 and a roller unit 912. The shaft 911 extends in the left-right direction 9. The roller portion 912 covers the outer periphery of the shaft 911. In the present embodiment, four roller portions 912 are provided at intervals in the left-right direction 9. The number of the roller units 912 may be three or less, or may be five or more. The first roller 91 is driven and rotated by a motor (not shown) to rotate. Note that the motor may be the same as or different from the motor that rotates the feed roller 25, the motor that rotates the transport roller 60, and the discharge roller 62.

  The second roller 92 is provided corresponding to the roller portion 912 of the first roller 91. That is, in the present embodiment, four second rollers 92 are provided at intervals in the left-right direction 9, and each of the second rollers 92 faces each of the roller units 912. The number of the second rollers 92 may be three or less or five or more depending on the number of the roller portions 912 of the first roller 91.

  The second roller 92 is rotatably supported by a roller holder 87 described later. The second roller 92 moves by the rotation of the roller holder 87. The second roller 92 can be moved toward and away from the first roller 91 by the movement. The second roller 92 rotates with the rotation of the first roller 91 in a state in which the second roller 92 is in contact with the first roller 91 or in a state where the sheet is sandwiched between the first roller 91 and the second roller 92.

[Roller holder 87]
As shown in FIG. 5, the roller holder 87 is located above the upper end of the guide member 71 corresponding to the feed tray 131 and below the upper end of the guide member 71 corresponding to the feed tray 132. .

  The roller holder 87 has a guide surface 871 that forms a part of the transport path 65. The guide surface 871 extends upward from the upper end of the inclined surface 73 of the guide member 71 corresponding to the feed tray 131 toward the rear. The guide surface 871 guides the sheet passing through the inclined surface 73 in the transport direction 16.

  The four roller holders 87 are provided side by side in the left-right direction 9. The number of roller holders 87 is not limited to four.

  Each roller holder 87 rotatably supports the second roller 92 at its upper part. In the present embodiment, each of the four roller holders 87 supports one second roller 92.

  The manner in which each roller holder 87 supports the second roller 92 is not limited to the above. For example, three roller holders 87 are provided, and among the three roller holders 87, the roller holder 87 disposed in the middle in the left-right direction 9 is disposed in the middle of the four second rollers 92 in the right-left direction 9. The two second rollers 92 are supported, and the roller holder 87 disposed at the rightmost of the three roller holders 87 is the second roller 92 disposed at the rightmost of the four second rollers 92. The second roller 92 may be supported, and the leftmost roller holder 87 among the three roller holders 87 may support the second roller 92 disposed leftmost among the four second rollers 92. Further, for example, one roller holder 87 may be provided, and one roller holder 87 may support four second rollers 92.

  A part of the second roller 92 supported by the roller holder 87 projects from the guide surface 871 to the transport path 65. The guide surface 871 extends from upstream to downstream in the transport direction 16 from the second roller 92. That is, the roller holder 87 extends from the second roller 92 to the downstream in the transport direction 16.

  The roller holder 87 is supported by the housing 14 so as to be rotatable around a shaft 31 (an example of a rotation shaft of the roller holder) extending in the left-right direction 9. The housing 14 includes a shaft 31 extending in the left-right direction 9. The roller holder 87 includes a bearing 872 opened in the left-right direction 9. The shaft 31 is inserted into the opening 873 of the bearing 872. Thus, the bearing 872 supports the shaft 31. The bearing 872 and the shaft 31 are located below the roller holder 87. Further, the bearing 872 and the shaft 31 are located on the opposite side of the conveyance path 65 with respect to the guide surface 871. The bearing 872 and the shaft 31 are located below the second roller 92, that is, upstream of the second roller 92 in the transport direction 16.

  The roller holder 87 moves from the first position shown in FIG. 5 to the second position shown in FIG. 6 by rotating in the direction of the arrow 102. Further, the roller holder 87 moves from the second position to the first position by rotating in the direction of the arrow 103 opposite to the arrow 102 (see FIG. 6).

  As shown in FIG. 5, when the roller holder 87 is at the first position, the guide surface 871 forms a part of the transport path 65. When the roller holder 87 is at the first position, the second roller 92 is in contact with the first roller 91. When the second roller 92 contacts the first roller 91, the rotation of the roller holder 87 at the first position in the direction of the arrow 103 is restricted.

  As shown in FIG. 6, when the roller holder 87 is at the second position, the second roller 92 is separated from the first roller 91. The roller holder 87 at the second position is in contact with a later-described second rib 98 of the guide member 85 from the front and above. Accordingly, the rotation of the roller holder 87 at the second position in the direction of the arrow 102, that is, the rotation in the direction away from the first position, is restricted.

  The bearing 872 has a gap 94 (an example of an open portion) in a part in the circumferential direction 101. That is, the bearing 872 is partially open in the circumferential direction 101. The gap 94 is shorter than the diameter of the shaft 31. The shaft 31 is fitted to the bearing 872 via the gap 94. When the shaft 31 passes through the gap 94, the bearing 872 is pushed by the shaft 31 and flexes. As a result, the gap 94 increases, and the shaft 31 can pass through the gap 94. When the shaft 31 passes through the gap 94 and is fitted to the bearing 872, the bending of the bearing 872 is eliminated. Therefore, the shaft 31 is prevented from coming off the bearing 872 through the gap 94.

  The configurations of the shaft 31 and the bearing 872 are not limited to the above. For example, the roller holder 87 may include the shaft 31 and the housing 14 may include the bearing 872. Further, for example, the bearing 872 may not have the gap 94. In this case, the shaft 31 is inserted into the bearing 872 along the left-right direction 9.

[Torsion coil spring 88]
The torsion coil spring 88 shown in FIG. 5 urges the roller holder 87 in the direction of the arrow 103 (see FIG. 6). That is, the torsion coil spring 88 urges the roller holder 87 toward the first position.

  The shaft 31 passes through the torsion coil spring 88. One arm 881 of the torsion coil spring 88 is connected to the roller holder 87. The other arm 882 of the torsion coil spring 88 is connected to the housing 14.

  The urging member for urging the roller holder 87 is not limited to the torsion coil spring 88 but may be, for example, a leaf spring.

[Guide member 85]
As shown in FIG. 2, the guide member 85 is located behind the feed trays 132 and 133.

  As shown in FIG. 5, the guide member 85 includes a main body 95, a bearing 96, a first rib 97, and a second rib 98.

  The main body 95 has an appearance as shown in FIG. The main body 95 has a concave portion 99 which is concaved upward in the state shown in FIG. The concave portion 99 is defined by two surfaces 991 and 992. In the state shown in FIG. 5, the surface 991 extends upward as going forward. In addition, the surface 992 extends upward toward the rear. That is, in the state shown in FIG. 5, the surface 991 extends toward the bottom of the concave portion 99 as approaching the axis 32, and the surface 992 extends toward the bottom of the concave portion 99 as moving away from the axis 32. . The surfaces 991 and 992 are continuous at the bottom of the recess 99.

  As shown in FIG. 2, the bearing 96 is provided at a lower part of the main body 95 and is opened in the left-right direction 9. The shaft 32 (an example of a rotating shaft of the guide member 85) provided in the housing 14 and extending in the left-right direction 9 is inserted into the opening 961 of the bearing 96. Thereby, the bearing 96 supports the shaft 32. That is, the guide member 85 is rotatably supported by the main body 95.

  As shown in FIGS. 5 and 9, the shaft 32 and the bearing 96 are located behind the second roller 92. That is, the shaft 32 and the bearing 96 are located on the opposite side of the second roller 92 from the first roller 91.

  The opening 961 of the bearing 96 has an elliptical shape. Thus, the bearing 96 into which the shaft 32 has been inserted is relatively movable with respect to the shaft 32. That is, the guide member 85 is slidably supported by the main body 95. That is, the guide member 85 is rotatable and slidable with respect to the main body 95.

  The first rib 97 protrudes forward from the front surface 952 of the main body 95 in the state shown in FIG. The plurality of first ribs 97 are provided at intervals in the left-right direction 9. Each first rib 97 extends along the transport direction 16, that is, substantially upward. The leading end of the first rib 97 forms a part of the transport path 65, and can guide a sheet. The distal end of the downstream end 971 of the first rib 97 is curved while changing its direction from above to forward. Accordingly, as described above, the transport path 65 is curved forward from above the rear end of the feed tray 133. Thus, the downstream end 971 of the first rib 97 in the transport direction 16 protrudes forward from other portions.

  The second rib 98 protrudes forward from the front surface 952 of the main body 95 in the state shown in FIG. That is, the second rib 98 protrudes from the main body 95 to the same side as the first rib 97. The plurality of second ribs 98 are provided at intervals in the left-right direction 9. As shown in FIG. 6, each of the second ribs 98 abuts on the roller holder 87 at the second position from below to support the roller holder 87 at the second position, and also indicates the arrow of the roller holder 87 at the second position. The rotation in the direction of 102 is regulated.

  The guide member 85 is rotatable between a closed position shown in FIG. 1 and an open position shown in FIG. The guide member 85 in the closed position is shown in FIGS. 7 and 9 in addition to FIG. The guide member 85 in the open position is shown in FIGS. 5, 6, and 8 in addition to FIG. The guide member 85 moves from the closed position to the open position by rotating in the direction of the arrow 104 (see FIG. 7). The guide member 85 moves from the open position to the closed position by rotating in the direction of the arrow 105 (see FIG. 8).

  As shown in FIGS. 1, 7, and 9, when the guide member 85 is in the closed position, each part of the guide member 85 is in the following state.

  As shown in FIG. 1, the main body 95 extends substantially in the vertical direction 7 and the horizontal direction 9. The rear surface 951 of the main body 95 forms a part of the rear surface of the housing 14. That is, the main body 95 forms a part of the rear wall of the housing 14. Further, as shown in FIG. 9, the first rib 97 is located downstream of the second roller 92 in the transport direction 16. Further, the leading end of the first rib 97 constitutes a part of the transport path 65, and can guide the sheet. Further, the second rib 98 is located below the first rib 97. That is, the second rib 98 is located upstream of the first rib 97 in the transport direction 16. Further, the second rib 98 is located behind the roller holder 87. That is, the second rib 98 is located on the side opposite to the transport path 65 with respect to the roller holder 87.

  As shown in FIG. 7, when the guide member 85 is in the closed position, the shaft 32 is located at one end (the lower end in FIG. 7) of the opening 961 of the bearing 96. In the process of rotating the guide member 85 from the closed position to the open position, the shaft 32 relatively moves from one end of the opening 961 of the bearing 96 to the other end (from the lower end to the upper end). That is, the bearing 96 moves relatively downward with respect to the shaft 32. Thereby, the guide member 85 slides downward. As a result, when the guide member 85 rotates, the downstream end portion 971 of the first rib 97 in the transport direction 16 abuts on a member located above (for example, the guide member 33 forming a part of the transport path 65). Can be avoided. Therefore, it is possible to prevent the rotation of the guide member 85 from being hindered by the guide member 33.

  In a state where the guide member 85 is rotated in the direction of the arrow 104 to reach the open position, as shown in FIG. 5, the bottom of the concave portion 99 (the boundary between the surface 991 and the surface 992) is The convex portion 34 (an example of the contact portion) contacts from below. The convex portion 34 protrudes upward from a base portion 151 constituting a lower portion of the housing 14. As a result, the rotation of the guide member 85 in the direction of the arrow 104 (the direction away from the closed position, see FIG. 7) is restricted by the protrusion 34. The sliding of the guide member 85 due to the relative movement of the bearing 96 with respect to the shaft 32 is also restricted by the projection 34.

  As shown in FIG. 8, when the guide member 85 is in the open position, the shaft 32 is located at the other end (upper end) of the opening 961 of the bearing 96. On the other hand, as described above, when the guide member 85 is in the closed position, the shaft 32 is located at one end (lower end) of the opening 961 of the bearing 96 (see FIG. 7). Thereby, the volume of the guide member 85 located in the space 89 is larger at the open position than at the closed position. Here, the space 89 is a space formed behind the roller holder 87. In other words, the space 89 is formed on the opposite side of the roller holder 87 from the first roller 91.

  As shown in FIGS. 3, 5, 6, and 8, when the guide member 85 is in the open position, each part of the guide member 85 is in the following state.

  As shown in FIGS. 3 and 5, the transport path 65 and the roller holder 87 are exposed to the outside. Further, the convex portion 34 is in contact with the guide member 85 at a contact position 100 between the shaft 32 and the distal end 851 of the guide member 85. Further, a portion of the guide member 85 closer to the distal end 851 of the guide member 85 than the contact position 100 is heavier than a portion of the guide member 85 opposite to the distal end 851 of the guide member 85 with respect to the contact position 100. . As shown in FIG. 6, the second rib 98 of the guide member 85 is on the opposite side of the distal end 851 of the guide member 85 with respect to the contact position 100 (in other words, on the opening 961 side of the bearing 96 with respect to the contact position 100). Can contact the roller holder 87 at the second position.

[Operation of Guide Member 85 and Roller Holder 87 for Paper Jam]
When a sheet is jammed near the intermediate roller pair 86, the user rotates the guide member 85 from the closed position (see FIG. 1) to the open position (see FIG. 3). Thereby, the conveyance path 65 in which the paper is jammed is exposed to the outside.

  When the sheet is not held between the intermediate roller pair 86, the sheet is taken out by the user.

  When the sheet is held between the pair of intermediate rollers 86, the user pulls the sheet rearward (or obliquely upward rearward). At this time, a force in the direction of arrow 102 (see FIG. 5) acts on the roller holder 87 from the sheet. As a result, the roller holder 87 rotates from the first position to the second position against the urging force of the torsion coil spring 88. As a result, the second roller 92 is separated from the first roller 91, so that the sheet can be easily taken out.

  Further, when the sheet is held between the pair of intermediate rollers 86, the user may grip the roller holder 87 and rotate from the first position (see FIG. 5) to the second position (see FIG. 6). . More specifically, a portion of the guide surface 871 of the roller holder 87 downstream of the second roller 92 in the transport direction 16 (the tip of the rotation of the roller holder 87) is pressed by the user, so that the roller holder 87 is in the first position. From the position to the second position. Thereby, since the second roller 92 is separated from the first roller 91, the sheet can be easily taken out.

  When the sheet is taken out and the user does not touch the roller holder 87, the roller holder 87 rotates from the second position to the first position by the urging force of the torsion coil spring 88.

  Finally, the guide member 85 is turned from the open position to the closed position by the user.

[Effects of Embodiment]
According to the present embodiment, the roller holder 87 is exposed to the outside by rotating the guide member 85 from the closed position to the open position. Here, according to the present embodiment, the rotation of the guide member 85 and the movement of the roller holder 87 can be individually performed. Therefore, even if the guide member 85 is rotated, the roller holder 87 does not move. As a result, unnecessary movement of the roller holder 87 can be prevented, so that performance degradation of the torsion coil spring 88 can be reduced.

  Further, according to the present embodiment, the movement of the roller holder 87 is restricted to the second position by abutting on the second rib 98 of the guide member 85 in the open position. In other words, according to the present embodiment, it is not necessary to add another member or complicate the structure for the regulation, so that the movement of the roller holder 87 can be regulated with a simple configuration.

  Further, according to the present embodiment, the volume of the portion where the guide member 85 at the open position is located in the space 89 is a volume obtained by adding an additional portion to the portion where the guide member 85 at the closed position is located within the space 89. Become. Therefore, a member for contacting the roller holder 87 and restricting the movement of the roller holder 87 cannot be arranged in this additional portion. However, in the present embodiment, even if the member is not disposed in this additional portion, the guide member 85 in the open position located in this additional portion contacts the roller holder 87 in the second position to move the roller holder 87. Can be regulated.

  Further, according to the present embodiment, the guide member 85 can be rotated and slid by moving the shaft 31 in the opening 961 of the bearing 96. Thus, it is possible to prevent the guide member 85 from being caught on another member (for example, the guide member 33) during the rotation.

  Further, according to the present embodiment, the protrusion 34 prevents the guide member 85 from moving unintentionally due to the shaft 32 moving in the opening 961 of the bearing 96.

  Further, according to the present embodiment, the portion of the guide member 85 from the contact position 100 to the tip 851 is heavier than the portion of the guide member 85 from the contact position 100 to the shaft 32. Further, according to the present embodiment, the roller holder 87 at the second position abuts on the second rib 98 of the guide member 85 on the side opposite to the tip end 851 with respect to the abutment position 100. Therefore, even if a force acts on the guide member 85 when the roller holder 87 at the second position comes into contact with the second rib 98 of the guide member 85, the guide member 85 is unlikely to rotate. That is, the possibility that the guide member 85 is unintentionally rotated can be reduced.

  Further, according to the present embodiment, the second rib 98 is at a position opposite to the transport path 65 with respect to the roller holder 87. Therefore, when the guide member 85 is in the closed position, it is possible to prevent the second rib 98 from being located in the transport path 65 and hindering the transport of the sheet.

  Further, according to the present embodiment, the roller holder 87 can be easily rotated by gripping a portion of the roller holder 87 that extends from the second roller 92 to the downstream side in the transport direction 16.

  Further, according to the present embodiment, since the bearing 872 has the gap 94, the roller holder 87 can be easily attached to the housing 14. Further, since the shaft 31 is fitted to the bearing 872, the roller holder can be positioned. As a result, the nip accuracy of the second roller 92 with respect to the first roller 91 can be favorably maintained.

[Modification]
In the above embodiment, the roller holder 87 has moved between the first position and the second position by rotating, but may move between the first position and the second position by means other than rotating. . For example, the roller holder 87 may move between the first position and the second position by sliding along the front-rear direction 8.

  In the above embodiment, the opening 961 of the bearing 96 is elliptical, but may be circular. In other words, the guide member 85 is rotatably and slidably supported. However, the guide member 85 may be supported by the main body 95 so as to be rotatable and not rotatable.

  In the above embodiment, the guide member 85 includes the first rib 97, and the tip of the first rib 97 forms a part of the transport path 65. However, the guide member 85 does not include the first rib 97. You may. In this case, for example, the surface of the main body 95 of the guide member 85 facing the transport path 65 forms a part of the transport path 65.

  In the above embodiment, the multifunction peripheral 10 includes the three feed trays 131, 132, and 133, but is not limited to three. For example, the multifunction peripheral 10 may include one feed tray 131.

  In the above embodiment, the sheet transport device is a device for transporting a sheet on which an image is recorded by a print function in the multifunction peripheral 10 which is an example of an image recording device. However, the sheet conveying device is not limited to the above device. For example, the sheet conveying device may be provided in a scanner. In this case, the sheet transport device is a device that transports a document sheet on which an image is read by a scanner.

10 Multifunction machine (image recording device)
14 ... Case (body)
65: conveying path 85: guide member 87: roller holder 88: torsion coil spring (biasing member)
91: first roller 92: second roller

Claims (11)

A main body having a conveyance path through which the sheet passes,
A first roller located on the transport path,
A second roller facing the first roller,
A roller holder rotatably supporting the second roller,
An urging member for urging the roller holder;
The second roller is rotatably supported by the main body on the opposite side of the first roller from the first roller, and exposes the closed position configuring the transport path, and the transport path and the roller holder to the outside. A guide member rotatable to the open position,
The roller holder has a first position at which the second roller contacts the first roller, and the second roller is separated from the first roller, and contacts the guide member at the open position. To move to the second position where the movement away from the first position is restricted,
The sheet conveying device, wherein the urging member urges the roller holder toward the first position.   Among the guide members, the volume located in the space provided on the opposite side of the roller holder of the main body from the first roller is larger at the closed position than at the open position. The sheet conveying device according to claim 1, which is small.   3. The sheet conveying device according to claim 1, wherein the guide member is movable in an elliptical bearing in which a rotation shaft of the guide member pivotally supports the rotation shaft. 4. The main body includes a contact portion that contacts the guide member in the open position,
4. The sheet conveying device according to claim 3, wherein the contact portion that contacts the guide member in the open position restricts movement of the bearing with respect to the rotation shaft. 5. The main body includes a contact portion that contacts the guide member in the open position,
The contact portion abuts on the guide member between the rotation shaft and the distal end of the guide member,
A portion of the guide member from the contact position with the contact portion to the tip is heavier than a portion of the guide member from the contact position to the rotation axis,
5. The sheet conveying device according to claim 1, wherein the guide member is in contact with the roller holder at the second position on a side opposite to the leading end with respect to the contact position. 6. The guide member,
A first rib capable of guiding the seat in the closed position;
A second rib that contacts the roller holder in the open position.
In a state where the guide member is located at the closed position, the first rib is located at a position downstream of the second roller in the sheet conveyance direction, and the second rib is located in the sheet conveyance direction more than the first rib. The sheet conveying apparatus according to any one of claims 1 to 5, wherein the sheet conveying apparatus is located upstream and on a side opposite to the conveying path with respect to the roller holder.   The sheet conveying device according to claim 1, wherein the roller holder is movable to the first position and the second position by rotating. The rotation axis of the roller holder is located upstream of the second roller in the sheet conveyance direction,
The sheet conveying device according to claim 7, wherein the roller holder extends to a downstream side of the second roller in the conveying direction. The bearing of the roller holder with respect to the rotation shaft includes an open portion that is partially open in the circumferential direction,
9. The sheet conveying device according to claim 7, wherein the rotation shaft of the roller holder can be fitted to the bearing via the opening. 10.   The sheet conveying device according to claim 1, wherein the guide member in the closed position forms a part of an outer wall of the main body. A sheet conveying device according to any one of claims 1 to 10,
An image recording apparatus comprising: a recording unit that records an image on a sheet on the transport path;

Images