JP2014205557A - Sheet conveying device including detachable member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet conveying device facilitating taking out sheets accumulated in a device body from the device body.SOLUTION: A sheet conveying device includes: a device body, a conveyance path provided on the device body; an opening opposed to a conveyance surface of the conveyance path; and a detachable member arranged in a fitting position positioned in the conveyance path, and detachable to the device body through the opening in a direction crossing the conveyance surface. The detachable member is a frame body forming an opening in the conveyance direction, and surrounding the conveyance path on a surface crossing the conveyance direction. The frame body is formed of a first part positioned on the opposite side of the opening across the conveyance path and extending in an orthogonal direction to the conveyance direction, a second part blocking the opening and extending in the orthogonal direction, and a support part supporting the first part and the second part.

Description

  The present invention relates to a sheet conveying apparatus provided with a detachable member.

  2. Description of the Related Art Conventionally, in a sheet conveying apparatus, a configuration for removing a sheet staying in the apparatus main body due to a jam or the like from the apparatus main body has been considered. For example, Patent Document 1 discloses a device in which a user removes a sheet from the apparatus main body by opening a cover and accessing the apparatus main body.

JP 2009-196087 A

  However, even if the cover is opened and the inside of the apparatus main body is accessed, it may be difficult to remove the jammed sheet.

  The present invention has been made to solve the above-described problems, and makes it easy to remove a sheet staying in the apparatus main body from the apparatus main body.

  The sheet conveying apparatus of the present invention made to achieve this object is located in the apparatus main body, a conveying path provided in the apparatus main body, an opening facing the conveying surface of the conveying path, and the conveying path. An attachment / detachment member disposed at an attachment position and attachable / detachable via the opening in a direction intersecting the transport surface with respect to the apparatus main body, and the attachment / detachment member forms an opening in the transport direction; A frame that surrounds the transport path on a surface that intersects the transport direction, and a first portion that is located on the opposite side of the opening and sandwiches the transport path and extends in a direction perpendicular to the transport direction; The frame body is constituted by a second part that closes the opening and extends in the orthogonal direction, and a support part that supports the first part and the second part. And

  In this way, it is possible to easily remove the sheet staying in the apparatus main body from the apparatus main body.

  The conveyance path has a substantially U-shaped path, and is provided in a linear portion on the upstream side in the conveyance direction of the substantially U-shaped path, and conveys a sheet in the path. A pair of conveyance rollers, and a second conveyance roller pair that is provided in a linear portion downstream of the conveyance direction of the substantially U-shaped path, and that conveys the sheet in the path. The position is located in a curved portion located between the upstream linear portion and the downstream linear portion in the transport direction, and the direction in which the attachment / detachment member is attached / detached is the direction of the curved portion. It is at least one of the transport direction of the upstream linear portion in the transport direction or the direction opposite to the transport direction of the downstream linear portion, which is a direction intersecting the transport surface. There may be.

  In this case, it is possible to easily remove the sheet that is sandwiched between the first conveyance roller pair and the second conveyance roller pair and stays in the curved portion from the inside of the apparatus main body.

  Further, the first part of the attachment / detachment member positioned at the attachment position is urged and retracted out of the transport path, and the attachment / detachment member is attached by the first part when the attachment / detachment member is taken out of the apparatus main body. A guide member that is displaced to a position where the force is released and guides the sheet to the opening may be provided.

  In this way, even when the detachable member is taken out of the apparatus main body, the sheet can be easily removed from the apparatus main body.

  The length of the first portion in the transport direction may be shorter than the length of the second portion in the transport direction.

  In this way, it is possible to easily remove the sheet from the apparatus main body while reducing catching and the like.

  Further, the attachment / detachment member disposed at the mounting position in the apparatus main body from the opening may include a prevention member for preventing the mounting member from being disposed in the apparatus main body beyond the mounting position. Good.

  In this way, in addition to making it easier to remove the sheet from the inside of the apparatus main body, it is possible to prevent the detachable member from being disposed in the apparatus main body beyond the mounting position.

  In addition, the prevention member is provided in a portion corresponding to the protrusion of the device main body when the protrusion provided in the second portion and the attachment / detachment member are disposed at the mounting position. It may be a dent that does not penetrate into the body.

  According to the present invention, it is possible to easily remove a sheet staying in the apparatus main body from the apparatus main body.

It is a schematic sectional drawing showing the structure of the laser printer 1 which concerns on embodiment of this invention. 2 is a block diagram schematically showing an electrical configuration of the laser printer 1. FIG. It is a perspective view which shows schematic structure in 1st Example of the detachable member 40 which can be attached or detached with respect to the said laser printer. FIG. 3 is a top view showing a schematic configuration when the detachable member 40 is arranged at the mounting position of the laser printer 1 in the first embodiment. FIG. 3 is a schematic front view showing a state in which the detachable member 40 is arranged at the mounting position of the laser printer 1 in the first embodiment. FIG. 3 is a schematic side view showing a state in which the detachable member 40 is arranged at the mounting position of the laser printer 1 in the first embodiment. FIG. 3 is a schematic side view showing a state when the detachable member 40 is taken out from the laser printer 1 in the first embodiment. It is a perspective view which shows schematic structure in 2nd Example of the detachable member. FIG. 6 is a schematic side view showing a state in which the detachable member 40 is arranged at the mounting position of the laser printer 1 in the second embodiment. FIG. 6 is a schematic side view showing a state when the detachable member 40 is taken out from the laser printer 1 in the second embodiment. It is a perspective view which shows schematic structure in 3rd Example of the detachable member. It is a top view which shows schematic structure at the time of arrangement | positioning to the mounting position of the said laser printer 1 in the 3rd Example of the attachment / detachment member 40. FIG. It is a schematic front view showing the state at the time of arrangement | positioning to the mounting position of the said laser printer 1 in the 3rd Example of the detachable member 40. FIG. It is a schematic sectional side view showing the AA 'section of Drawing 5c. FIG. 5 is a side view showing a schematic configuration of a conveyance path including a guide member 45 when the detachable member 40 is taken out. It is a figure which shows schematic structure of the guide member 45 seen from the direction of arrow B of FIG. 6a. 6 is a side view showing a schematic configuration when the detachable member 40 is taken out when the sheet S is positioned on a conveyance path including the guide member 45. FIG. FIG. 6 is a side view showing a schematic configuration when the sheet S is positioned on the conveyance path including the guide member 45 when the detachable member 40 is arranged at the mounting position.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(First embodiment)
(1) Schematic Configuration of Laser Printer First, the schematic configuration of the laser printer 1 according to the present embodiment will be described.

  FIG. 1 is a schematic sectional view showing a configuration of a laser printer 1 according to an embodiment of the present invention.

  In the following description, the left side in FIG. 1 is “front”, the right side is “rear”, the front side of the page is “right”, and the back side is “left”. Also, the vertical direction in FIG.

  As shown in FIG. 1, the laser printer 1 includes a main body housing 2 (an example of an apparatus main body), a paper feeding unit 3, an exposure unit 4, a process unit 5, and a fixing unit 7 disposed in the main body housing 2. A top cover 8 provided on the main body housing 2 and a discharge tray 9 provided on the front side of the main body housing 2 are mainly provided.

  The sheet feeding unit 3 is configured to supply a sheet S (an example of a sheet) to the process unit 5, and includes a supply tray 31 that can store the sheet S, a separation roller 34, a conveyance roller 36, and a registration roller 37. And mainly. When forming an image, first, the sheet S in the supply tray 31 is supplied to the process unit 5 by the separation roller 34, the conveyance roller 36 and the registration roller 37.

  The exposure unit 4 exposes the photosensitive drum 51 of the process unit 5.

  The process unit 5 is configured to transfer a toner image as a developer image to the sheet S supplied from the supply tray 31, and includes a photosensitive drum 51, a transfer roller 53, and the like. In the process unit 5, the surface of the photosensitive drum 51 is uniformly charged and then exposed by the exposure unit 4, whereby an electrostatic latent image is formed on the photosensitive drum 51. Then, the toner in the developer accommodating portion 67 is supplied to the photosensitive drum 51, whereby the electrostatic latent image is visualized and a toner image is formed on the photosensitive drum 51. Thereafter, the sheet S supplied from the sheet feeding unit 3 passes between the photosensitive drum 51 and the transfer roller 53, whereby the toner image on the photosensitive drum 51 is transferred onto the sheet S.

  The fixing unit 7 is configured to thermally fix the toner image on the sheet S conveyed from the process unit 5, and mainly includes a heating roller 71 and a pressure roller 72. The sheet S on which the toner image has been transferred by the process unit 5 passes between the heating roller 71 and the pressure roller 72 so that the toner image is thermally fixed. Thus, the image formation is completed, and thereafter, the sheet is discharged onto the discharge tray 9 by a first roller 73 (an example of a first conveying roller pair) provided upstream of a switching path 125 described later.

  The top cover 8 is displaceable between a closed position shown in FIG. 1 and an open position (not shown) by rotating the front part upward with respect to the main body housing 2 around the rotation axis 81 at the rear part. Is provided. The top cover 8 is displaced to the open position mainly when the developer accommodating portion 67 and the like are replaced.

  Next, the conveyance path of the sheet S formed in the main body housing 2 and the configuration related thereto will be described.

  The laser printer 1 is configured to be able to form images on both sides of the sheet S, and includes a first supply path 110, a second supply path 120, a switching path 125, a discharge path 130, and a re-conveyance path 140. The conveyance path (an example of a conveyance path) is provided. Each path is formed by wall-shaped or rib-shaped guides (reference numerals omitted) provided to face a surface on which an image of the sheet S passing through the path is formed, and the A4 size sheet S is supplied to the supply tray. Specifically, the A4 size sheet S can be guided in a state in which the longitudinal direction thereof is directed in the left-right direction while maintaining the orientation accommodated in 31.

  The first supply path 110 is a path for guiding the sheet S accommodated in the supply tray 31 toward the process unit 5, extends from the upper conveying roller 36 toward the front obliquely upward, and then the separation roller 34. It extends to the registration roller 37 (process unit 5) while curving forward along the peripheral surface.

  The second supply path 120 guides the sheet S set in the manual opening 24 toward the process unit 5, and an image is formed on one surface of the sheet S set in the manual opening 24 or the supply tray 31. This is a route for guiding again to the process unit 5 in order to form an image on the other surface. Here, the manual feed opening 24 is an opening for supplying the sheet S to the process unit 5 from the outside of the main body housing 2, and is provided on the upstream side of the process unit 5 in the conveyance direction of the sheet S in the process unit 5. Are provided at the upper part of the rear end of the main body housing 2 and open upward. The second supply path 120 extends to the vicinity of the first supply path 110 from the manual feed opening 24 toward the front diagonally downward, and then extends to the registration roller 37 (process unit 5) while curving forward. The first supply path 110 is merged on the upstream side in the sheet conveyance direction. In the second supply path 120, the forward conveyance direction in which the sheet S is conveyed toward the process unit 5 near the lower portion of the rotation shaft 81 of the top cover 8, and the outside of the main body casing 2 through the manual opening 24. A conveyance roller 121 is provided that is configured to be able to switch the rotation direction to the reverse conveyance direction for conveying toward the front.

  As shown in FIG. 1, a manual feed tray 25 is provided at the rear of the main body housing 2. The manual feed tray 25 is set in the manual feed opening 24 by being in an upright position shown in FIG. 1 in a posture along the vertical direction with respect to the main body housing 2 and in a posture swinging backward from the upright position. The sheet S is provided so as to be displaceable between an inclined position (not shown) for supporting the sheet S from below. The manual feed tray 25 is provided so as to form a predetermined gap between the manual feed tray 25 and the top cover 8 when it is in an upright position. It has guide part 25A extended toward. With such a configuration, when the manual feed tray 25 is in the upright position, the laser printer 1 extends upward from the manual feed opening 24 to the top surface of the top cover 8, and then bends forward and the top surface of the top cover 8. An inversion path 150 is formed that opens toward the surface.

  The switching path 125 (an example of an upstream linear portion) is a path for guiding the sheet S discharged from the fixing unit 7 to the outside of the main body housing 2 (discharge tray 9) or to the process unit 5 again. It extends in the front-rear direction from the fixing unit 7 to a discharge path 130 described later. A first roller 73 for conveying the sheet S is provided in the switching path 125. Note that the switching path 125 does not have to extend completely in the front-rear direction, and for example, may be one that is slightly inclined in the vertical direction.

  The discharge path 130 is a path for guiding the sheet S discharged from the fixing unit 7 toward the outside of the main body housing 2 (discharge tray 9), and is provided from the switching path 125 to the front portion of the main body housing 2. Further, it extends in the front-rear direction to the discharge opening 26 constituted by the edge of the opening extending in the left-right direction.

  The re-conveying path 140 is a path for guiding the sheet S discharged from the fixing unit 7 toward the process unit 5 again. This re-conveying path 140 extends obliquely upward in the forward direction so as to branch from the switching path 125, then curves backward, and continues to the vicinity of the branch point from the switching path 125 (first path 141 ( An example of a curved portion) and a second path 142 extending in the front-rear direction from the first path 141 to above the transfer roller 53 through the fixing unit 7 and the process unit 5 (an example of a downstream linear portion). And continuously extending from the vicinity of the transfer roller 53 from the vicinity of the second path 142 to the vicinity of the junction of the first supply path 110 and the second supply path 120, and finally extending obliquely downward from the front. It mainly includes a third path 143 that curves toward the transport roller 121 (manual opening 24). In addition, the 2nd path | route 142 does not need to extend in the perfect front-back direction, for example, may be inclined in the some up-down direction.

  As shown in FIG. 1, an opening portion 27 (an example of an opening portion) configured by an edge of an opening provided in the front portion of the main body housing 2 and extending in the left-right direction is provided in front of the first path 141. ing. In particular, the opening 27 is provided so as to oppose the vertical direction (an example of the conveyance direction) and the left-right direction surface (an example of the conveyance surface), which are conveyance directions, near the center of the first path 141.

  In addition, a detachable member 40 (an example of a detachable member) is disposed in the first path 141. More specifically, the second portion 40B, which will be described later, is located at the same position as the opening 27 in the up-down direction, and the second position 40B, which will be described later, closes the opening 27 in the front-rear direction. The detachable member 40 can be attached to and detached from the main body housing 2 through the opening 27.

  A second roller 144 (an example of a second transport roller pair) for transporting the sheet S is provided in the second path 142.

  The third path 143 is provided with a conveyance roller 145 for conveying the sheet S.

  A flapper 131 is provided at a branch portion that branches from the switching path 125 to the discharge path 130 or the re-transport path 140. The flapper 131 has a rear part that can swing up and down around the front part. The flapper 131 swings upward as indicated by a chain line when discharging the sheet S discharged from the fixing unit 7 to the discharge tray 9 upon completion of image formation, and the flapper 131 of the sheet S on which an image is formed on one surface. When the sheet S discharged from the fixing unit 7 is guided again to the process unit 5 in order to form an image on the other surface, the sheet S swings downward as indicated by a solid line. As a result, when the flapper 131 swings downward, a path (an example of a path) formed by the switching path 125, the first path 141, and the second path 142 is configured in a substantially U shape. The substantially U-shape includes not only a complete U-shape but also a curved portion surrounded by two straight portions such as a U-shape, for example, having a shape close to a straight line.

  As described above, when the sheet S discharged from the fixing unit 7 is discharged to the discharge tray 9 after passing through the first supply path 110, the process unit 5, the fixing unit 7, etc., the sheet S passes through the fixing unit 7. Then, it passes through the switching path 125 and the discharge path 130 and is discharged to the discharge tray 9.

  On the other hand, when the sheet S discharged from the fixing unit 7 is guided again to the process unit 5 in order to form an image on the other side of the sheet S having an image formed on one side, the sheet S is fixed. After passing through the unit 7, it passes through the switching path 125 and the re-transport path 140. Then, the sheet S is conveyed in the reverse conveying direction by the reverse rotation of the conveying roller 121 of the second supply path 120 until the end on the rear side in the sheet conveying direction is sandwiched, and passes through the reverse path 150, and is forwardly rotated by the conveying roller 121. It is conveyed in the forward conveyance direction, passes through the second supply path 120, and is conveyed again to the process unit 5.

(2) Electrical Configuration of Laser Printer FIG. 2 is a block diagram schematically showing the electrical configuration of the printer 1.

  As shown in FIG. 2, the printer 1 includes a CPU 60, a memory 61, a network interface (hereinafter referred to as “network I / F”) 62, a notification unit 15, a flapper 131, a detection unit 16, a drive motor 17, and the like.

  The memory 61 stores a program for executing the operation of the laser printer 1. The CPU 60 controls each unit according to the program read from the memory 61.

  The network I / F 62 is connected to an external computer (not shown) or the like via a communication line so that mutual data communication is possible.

  The notification unit 15 includes a display, a lamp, and the like, and can display the operation state of the apparatus by the CPU 60 to notify the user of information.

  The flapper 131 swings upward as indicated by a chain line when the sheet S discharged from the fixing unit 7 upon discharge of the image by the CPU 60 is discharged to the discharge tray 9, and forms an image on the other surface. When the sheet S discharged from the fixing unit 7 is guided to the process unit 5 again, the sheet S is controlled to swing downward as indicated by a solid line.

  The detection unit 16 is provided upstream of the first roller 73, downstream of the second roller 144, and the like, and transmits two detection signals to the CPU 60 corresponding to the presence or absence of the sheet S.

  The drive motor 17 rotationally drives various rollers such as the first roller 73 and the second roller 144 using a gear mechanism (not shown).

(3) Schematic Configuration of Detachable Member FIG. 3 a is a perspective view showing a schematic configuration in the first embodiment of the detachable member 40 detachable from the laser printer 1. FIG. 3B is a top view showing a schematic configuration when the detachable member 40 is arranged in the mounting position of the laser printer 1 in the first embodiment. FIG. 3c is a schematic front view showing a state in which the detachable member 40 is arranged at the mounting position of the laser printer 1 in the first embodiment. FIG. 3d is a schematic side view showing a state in which the detachable member 40 is arranged at the mounting position of the laser printer 1 in the first embodiment.

  In the description with reference to FIGS. 3A to 5D, the detachable member 40 is assumed to be the left and right reference when viewed from the front side in the same vertical direction as FIG.

  The detachable member 40 includes a first part 40A (an example of the first part), a second part 40B (an example of the second part), and a support part 40C (an example of the support part). As shown in FIG. 1, the frame body (an example of the frame body) is formed with an opening (an example of the opening) in the vertical direction.

  40 A of 1st parts are extended in the left-right direction, and the front side which hits the inner side of the attachment or detachment member 40 is comprised by the curved surface. This makes it easier for the sheet S to follow the first portion 40A when taking out the detachable member 40, which will be described in detail later.

  When the detachable member 40 is disposed at the mounting position of the main body housing 2, the first portion 40A is located on the opposite side of the opening 27 with the first path 141 interposed therebetween as shown in FIG. 3d.

  The second portion 40B extends in the left-right direction, and has a handle member 40E at the center thereof. The handle member 40E has a plurality of convex portions on each surface in the vertical direction of a plate-like member that is flat in the front-rear direction and the left-right direction.

  As shown in FIGS. 3c and 3d, the second portion 40B is configured to close the opening 27 when the detachable member 40 is disposed at the mounting position. The second portion 40B blocks the opening 27 only when the second portion 40B has the same size as the opening 27 and there is almost no gap between the second portion 40B and the opening 27. Instead, the second portion 40B is slightly smaller than the opening 27, and includes a case where a gap is formed so that a human finger does not enter when the detachable member 40 is disposed at the mounting position.

  The support portion 40C extends in the front-rear direction so as to support the first portion 40A and the second portion 40B at opposite ends.

  As shown in FIG. 3b, the detachable member 40 is configured so that the first portion 141A is arranged in the front-rear direction and the left-right direction between the first portion 40A, the second portion 40B, and the support portion 40C when arranged in the mounting position. It is configured to surround.

  Further, the detachable member 40 is taken out from the mounting position forward from the mounting position to the outside of the main body casing 2 through the opening 27 and is mounted backward from the outside of the main body casing 2 to the mounting position. On the other hand, it is removable.

(4) Attachment / detachment of attachment / detachment member FIG. 3e is a schematic side view showing a state of the attachment / detachment member 40 taken out from the laser printer 1 in the first embodiment.

  The detection unit 16 detects the sheet S at a location upstream of the first roller 73 and downstream of the second roller 144 for a certain period of time, so that the CPU 60 attaches and detaches in the transport path, particularly as shown in FIG. When it is determined that the sheet S is retained while being held between the first roller 73 and the second roller 144 at the mounting position of the member 40, the notification unit 15 notifies the user by interrupting the processing. A notification is made to remove the detachable member 40 from the main body housing 2.

  The user takes out the detachable member 40 from the opening 27 as shown in FIG. 3E by grasping the handle member 40E and pulling it forward.

  At the time of taking out, the first portion 40A moves in the forward direction, so that the attachment position of the detachable member 40, that is, the direction in which the opening 27 is located in the seat S positioned in front of the first portion 40A is moved forward. A force is applied and one or both of a backward force and a forward force are applied to the first roller 73 and the second roller 144 by the sheet S. In particular, when the force reaches a size required to pull out the sheet S from the first roller 73 or the second roller 144, the sheet S is released from one or both of the first roller 73 and the second roller 144, and the sheet S Is guided toward the opening 27, that is, toward the outside of the main body housing 2.

  Then, after taking out the sheet S guided to the outside of the main body housing 2, the user inserts the detachable member 40 through the opening 27 and returns it to the original position.

  When the CPU 60 receives an instruction indicating that the removal of the sheet S has been completed by a user operation on an operation unit (not shown), the CPU 60 determines that the retention of the sheet S has been resolved, and performs an interrupted process or the like.

<Effect>
According to the embodiment described above, the user can attach and detach the detachable member 40 from the apparatus housing 2 in the front-rear direction via the opening 27. Thus, the first portion located on the opposite side of the opening 27 across the first path 141 of the transport path and extending in the left-right direction with respect to the vertical direction that is the transport direction at the mounting position causes the opening 27 to And the sheet S located at the mounting position is guided out of the apparatus housing 2. Therefore, the sheet S staying in the apparatus housing 2 can be easily removed from the apparatus housing 2.

Further, when the detachable member 40 is taken out through the opening 27, if the sheet S is sandwiched between the first roller 73 and the second roller 144 and stays in the first path 141, before the detachable member 40 is taken out. The direction force component tends to be a backward force to the first roller 73 that pulls out the sheet S from at least one of the first roller 73 or the second roller 144 or a forward force component to the second roller 144. Accordingly, when the detachable member 40 is taken out, at least one of the backward force component received by the first roller 73 from the sheet S or the backward force component received by the second roller 144 from the sheet S is the first component. The size required to pull out the sheet S from the first roller 73 or the second roller 144 tends to be large. Therefore, the sheet S can be removed from the first roller 73 or the second roller 144 and guided out of the main body housing 2.
Therefore, in particular, the sheet S sandwiched between the first roller 73 and the second roller 144 and staying in the first path 141 can be easily removed from the main body housing 2.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. 4a to 4d. The points not described are the same as in the first embodiment.

  FIG. 4 a is a perspective view showing a schematic configuration of the detachable member 40 in the second embodiment. FIG. 4B is a schematic side view showing a state in which the detachable member 40 is arranged at the mounting position of the laser printer 1 in the second embodiment. FIG. 4 c is a schematic side view showing a state in which the detachable member 40 is taken out from the laser printer 1 in the second embodiment.

  In addition, the schematic top view showing the state at the time of arrangement | positioning to the mounting position of the said laser printer 1 in the 2nd Example of the attachment / detachment member 40 is the same as FIG. 3b, The said laser in the 2nd Example of the attachment / detachment member 40 is. A schematic front view showing a state when the printer 1 is arranged at the mounting position is the same as FIG.

  As shown in FIGS. 4a and 4b, the vertical length of the first portion 40A is configured to be shorter than the vertical length of the second portion 40B.

  At the time of taking out the sheet S staying at the attachment position of the detachable member 40, the CPU 60 notifies the user to take out the detachable member 40 from the main body housing 2 by the notification unit 15, as in the first embodiment. The user takes out the detachable member 40 from the main body housing 2 by grasping the handle member 40E and pulling it forward.

  At this time, when the first portion 40A whose length in the vertical direction is shorter than the second portion 40B closing the opening 27 passes through the opening 27, a larger gap is formed between the opening 27 and the first portion 40A. The sheet S passes through this gap and is guided outward from the main body casing 2.

<Effect>
According to the embodiment described above, when the first portion 40A is taken out of the apparatus main body as the detachable member 40 is taken out, the vertical gap between the opening 27 and the first portion 40A is larger. . As a result, it is possible to reduce the catch or the like at the opening 27 when the sheet S located at the mounting position is guided out of the main body housing 2.
Therefore, it is possible to easily remove the sheet S from the main body housing 2 while reducing catches and the like.
Further, since the second portion 40B is configured to close the opening 27 at the mounting position, the detachable member 40 can be stably mounted to the main body housing 2 while providing the above effects. In addition, it is possible to prevent the user from accessing the main body housing 2 and reduce damage to members in the main body housing 2.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. 5a to 5d. The points not described are the same as in the first embodiment.

  FIG. 5 a is a perspective view showing a schematic configuration of the detachable member 40 in the third embodiment. FIG. 5B is a top view showing a schematic configuration when the detachable member 40 is arranged at the mounting position of the laser printer 1 in the third embodiment. FIG. 5 c is a schematic front view showing a state in which the detachable member 40 is arranged at the mounting position of the laser printer 1 in the third embodiment. FIG. 5d is a schematic cross-sectional side view showing the AA 'cross section of FIG. 5c.

  As shown in FIGS. 5a, 5b, and the like, a protrusion 40F (an example of a prevention member or protrusion) is provided on the upper portion of the second portion 40B.

  As shown in FIGS. 5 c and 5 d, a groove 27 </ b> A (an example of a prevention member and a recess) that does not penetrate into the main body housing 2 is provided on the opening 27 of the main body housing 2.

  As shown in FIG. 5d and the like, when the detachable member 40 is arranged at the mounting position of the main body housing 2, the protrusion 40F fits into the groove 27A so that the detachable member 40 does not move into the main body housing 2 from the mounting position. It is configured.

  At the time of taking out the sheet S staying at the attachment position of the detachable member 40, the CPU 60 notifies the user to take out the detachable member 40 from the main body housing 2 by the notification unit 15, as in the first embodiment. The user takes out the detachable member 40 from the main body housing 2 as shown in FIG. 3E by grasping the handle member 40E and pulling it forward. Then, the sheet S guided to the outside of the main body housing 2 by taking out the attaching / detaching member 40 is taken out, and the attaching / detaching member 40 is inserted from the opening 27 so that the protrusion 40F fits into the groove 27A and returned to the original position.

<Effect>
According to the embodiment described above, the sheet S can be easily removed from the inside of the main body housing 2, and the detachable member 40 can be prevented from being disposed in the main body housing 2 beyond the mounting position. it can. As a result, it is possible to prevent the detachable member 40 from becoming difficult to take out, damage to the members in the main body housing 2, and the like.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS. 6a to 6d. The points not described are the same as in the first embodiment.

  FIG. 6A is a side view showing a schematic configuration of the transport path including the guide member 45 when the detachable member 40 is taken out. FIG. 6B is a diagram showing a schematic configuration of the guide member 45 viewed from the direction of arrow B in FIG. 6A. FIG. 6C is a side view illustrating a schematic configuration when the detachable member 40 is taken out when the sheet S is positioned on the conveyance path including the guide member 45. 6D is a side view showing a schematic configuration when the detachable member 40 is disposed at the mounting position when the sheet S is positioned on the conveyance path including the guide member 45. FIG.

  The first path 141 includes a guide member 45 (an example of a guide member) below the mounting position of the detachable member 40 as shown in FIGS. 6a and 6d.

  The guide member 45 includes a rotation shaft 45A extending in the left-right direction and a guide portion 45B extending in a direction orthogonal to the rotation shaft 45A.

The guide member 45 is biased to the position shown in FIG. 6a by a spring or the like (not shown).
The guide member 45 can be rotated clockwise (rearward) about the rotation shaft 45A by applying a force to the guide portion 45B.

  As shown in FIG. 6b, a plurality of guide members 45 are provided in the left-right direction.

  In the above configuration, for example, after the user takes out the detachable member 40, the user forgets to rearrange it at the mounting position, and the user completes the removal of the sheet S while the detachable member 40 is removed from the main body housing 2. When the CPU 60 is instructed, the sheet S that is subsequently conveyed to the mounting position by the conveyance using the re-conveying path 140 is guided forward by the guide member 45 as shown in FIG. 6c. The That is, it is guided in the direction of the opening 27. The CPU 60 detects that the sheet S is not positioned downstream of the second roller 144 by the detection unit 16 for a certain time or more, and determines that the sheet S is not being conveyed despite being conveyed. Cancel.

  The user takes out the sheet S guided outward from the main body housing 2 and inserts the detachable member 40. The CPU 60 performs a new process after receiving an instruction that the removal of the sheet S is completed by an operation by the user of the operation unit.

  On the other hand, when the detachable member 40 is mounted at the mounting position, the guide member 45 is rotated backward by being biased with a constant force by the first portion 40A when the detachable member 40 is inserted. Evacuate out of the transport path.

  When the sheet S staying at the mounting position of the detachable member 40 is taken out, the sheet S is guided to the outside of the main body housing 2 by taking out the detachable member 40 as in the first embodiment. At this time, the guide member 45 is released from the bias by the first portion 40A and is displaced to the position shown in FIG. 6a.

  The user takes out the sheet S guided to the outside of the main body housing 2.

<Effect>
According to the embodiment described above, when the detachable member 40 is located at the attachment position, the sheet S located at the attachment position is guided out of the main body housing 2 by taking the detachable member 40 out of the main body housing 2. In addition, when the detachable member 40 is taken out of the main body housing 2, the sheet positioned at the mounting position of the conveyance path by the guide member 45 that is displaced to a position for guiding the sheet S to the opening 27. S can be guided out of the main housing 2.
Therefore, even when the detachable member 40 is taken out of the main body housing 2, the sheet S can be easily removed from the main body housing 2.

(Other examples)
(1) In the above embodiment, the sheet conveying apparatus is the laser printer 1, but the sheet conveying apparatus is not limited to this. For example, an inkjet printer, a multifunction machine having a copy function and a FAX function in addition to a printer function, and a sheet to be conveyed May be a reading device or the like.

  (2) In the above embodiment, the processing is executed by one CPU 60. However, the processing is executed by a plurality of CPUs 60, or only a hardware circuit such as ASIC (Applied SpeCiC Integrated Circuit), or the CPU 60 and the hardware A configuration in which processing is executed by a circuit may be used.

  (3) In the above embodiment, the attaching / detaching direction of the attaching / detaching member 40 is the direction orthogonal to the conveying surface, that is, the front-rear direction, but this need not be the case. For example, the structure which attaches or detaches in the diagonal front-back direction may be sufficient.

  (4) In the above embodiment, the path in which the sheet S held between the first roller 73 and the second roller 144 stays is a path that is guided out of the main body housing 2 by the detachable member 40. Is a substantially U-shaped path formed by the switching path 125, the first path 141, and the second path 142 in the case of swinging downward, but this need not be the case. For example, a linearly extending path may be used.

  (5) In the above embodiment, the mounting position of the detachable member 40 stays in the first path 141, and the first roller 73 has the first roller 73 in order to take out the sheet S sandwiched between the first roller 73 and the second roller 144. Although it was downstream and upstream of the second roller 144, this need not be the case. For example, in order to take out the sheet S staying in the first supply path 110, the first supply path 110 or the like may be used.

  (6) In the above embodiment, the size of the second portion 40B of the detachable member 40 in the vertical direction and the horizontal direction is slightly smaller than the opening 27, but this need not be the case. For example, the size of the second portion 40B in the vertical direction and the horizontal direction may be larger than the opening 27 and may cover the opening 27. In this case, it is possible to prevent the detachable member 40 from being pushed too much into the main body housing 2.

  (7) In the above embodiment, the front side of the first portion 40A is formed by a curved surface, but this need not be the case. For example, the front side of the first portion 40A may be a flat surface.

  (8) In the above embodiment, one support portion 40C is provided on each of the left and right sides, but this need not be the case. For example, only one may be provided on either the left or right side.

  (9) In the above-described embodiment, the handle member 40E has a configuration having convex portions on each surface in the up-down direction of the plate-like member flat in the front-rear direction and the left-right direction, but this need not be the case. For example, it may be a groove for catching a finger or the like.

  (10) In the above embodiment, the protrusion 40F is provided on the upper portion of the second portion 40B, but this need not be the case. For example, it may be provided on the right or left side of the second portion 40B. In this case, the groove 27A is also provided on the right or left side of the opening 27 corresponding to the protrusion 40F. Thereby, it is possible to prevent the detachable member 40 from being disposed in the main body housing 2 beyond the mounting position.

  (11) In the above-described embodiment, the groove 27A into which the protrusion 40F fits when the protrusion 40F and the attachment / detachment member 40 are arranged at the mounting position is used as the prevention member. However, this need not be the case. For example, a configuration in which the second portion 40B covers the opening 27 as described above may be used. Or the structure etc. which provide the wall etc. with which the rear surface of 1st part 40A abuts at the time of arrangement | positioning to the mounting position of the detachable member 40 may be sufficient.

DESCRIPTION OF SYMBOLS 1 Laser printer 27 Opening part 40 Detachable member 45 Guide member 73 1st roller 125 Switching path | route 140 Re-conveying path | route 141 1st path | route 142 2nd path | route 144 2nd roller S sheet | seat

Claims (6)

The device body;
A conveyance path provided in the apparatus main body and conveying a sheet;
An opening facing the transport surface of the transport path;
An attachment / detachment member that is disposed at an attachment position located in the conveyance path and is detachable via the opening in a direction intersecting the conveyance surface with respect to the apparatus main body,
The detachable member is a frame that forms an opening in the transport direction and surrounds the transport path on a surface that intersects the transport direction, and is positioned on the opposite side of the opening with the transport path interposed therebetween. A first portion extending in the orthogonal direction, a second portion closing the opening and extending in the orthogonal direction, and a support portion supporting the first portion and the second portion A sheet conveying apparatus, wherein The transport path has a substantially U-shaped path,
A first conveyance roller pair provided on a linear portion on the upstream side in the conveyance direction of the substantially U-shaped path, and conveying the sheet in the path;
A second conveyance roller pair that is provided in a linear portion on the downstream side in the conveyance direction of the substantially U-shaped path, and that conveys the sheet in the path;
The mounting position is located in a curved portion located between the upstream linear portion and the downstream linear portion in the transport direction, and the direction in which the attachment / detachment member is attached / detached is the curved portion This is a direction intersecting with the transport surface of at least one of the transport direction of the linear portion on the upstream side in the transport direction or the direction opposite to the transport direction of the linear portion on the downstream side. The sheet conveying apparatus according to claim 1.   The first portion of the detachable member located at the mounting position is urged by the first portion and retracted out of the transport path, and the urging by the first portion is performed when the detachable member is taken out of the apparatus main body. The sheet conveying apparatus according to claim 1, further comprising a guide member that is released and is displaced to a position for guiding the sheet to the opening.   4. The sheet conveying apparatus according to claim 1, wherein a length of the first portion in the conveyance direction is shorter than a length of the second portion in the conveyance direction. 5.   5. The apparatus according to claim 1, further comprising: a preventing member that prevents the detachable member disposed at the mounting position in the apparatus main body from the opening from being disposed in the apparatus main body beyond the mounting position. The sheet conveying apparatus according to any one of the above. The prevention member includes a protrusion provided on the second portion;
The sheet conveying apparatus according to claim 5, wherein the detachable member is a recess provided in a portion corresponding to the protrusion of the apparatus main body and not penetrating into the apparatus main body when the detachable member is disposed at the mounting position.

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