Recording device
Patent Information
- Application Number
- JP2022047588
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2022-03-23
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2042-03-23
AI Technical Summary
Existing recording devices face difficulties in removing sheets jammed in the conveyance path, particularly when the sheet is on a reversing path, as the current mechanisms for separating transport rollers are inadequate.
The recording apparatus employs a switching mechanism using multiple moving members to switch between states, allowing the pair of rollers to be separated based on the sheet's position in the conveyance path, enabling efficient removal of jammed sheets.
This configuration allows for effective separation of roller pairs using multiple members, facilitating the removal of sheets from various positions within the conveyance path, enhancing the device's usability and reliability.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to a recording apparatus for recording an image on a conveyed sheet. [Background technology]
[0002] In a recording device that records an image on a sheet, if a conveyed sheet becomes jammed in a conveyance path, the sheet must be removed. Patent Document 1 describes a recording device that can record images on the front side of a sheet conveyed from a stacking unit that stores sheets via a conveyance path, and on the back side of a sheet that has been inverted via the conveyance path. In this recording device, if a sheet becomes jammed in the conveyance path, a user can separate the pair of conveyance rollers using a sliding member to remove the sheet. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-64894 Summary of the Invention [Problem to be solved by the invention]
[0004] However, in the configuration described in Patent Document 1, when a sheet becomes jammed in the conveyance path, the slide member is operated regardless of the position of the sheet in the conveyance path. In this device, if the sheet is in the reversing path where the sheet is reversed, it is difficult to remove the sheet using the slide member. Thus, the mechanism for separating the pair of conveyance rollers needed further improvement. The present invention aims to provide a recording device that can separate the pair of rollers using multiple members. [Means for solving the problem]
[0005] The recording device of the present invention is a recording device that records an image on a sheet using a recording means, and is equipped with a pair of rollers for clamping and transporting a sheet, and a switching means for switching between a first state in which the sheet is clamped by the pair of rollers and a second state in which the pair of rollers are separated, and is characterized in that the switching means has a first moving member that switches from the first state to the second state by moving in a first direction, and a second moving member that switches from the first state to the second state by moving in a second direction different from the first direction. [Effects of the Invention]
[0006] According to the present invention, it is possible to provide a recording device that can separate a pair of rollers using a plurality of members. [Brief explanation of the drawings]
[0007] [Figure 1] FIG. 1 is an external view of a recording apparatus. [Figure 2] FIG. 2 is a cross-sectional view showing a sheet transport path of the recording apparatus. [Figure 3] FIG. 2 is a block diagram of a control unit. [Figure 4] 10A and 10B are diagrams illustrating how sheets are conveyed when double-sided recording is performed on a plurality of sheets. [Figure 5] This is a processing sequence for prompting the user to remove the sheet. [Figure 6] FIG. 2 is a diagram showing the internal configuration of a recording apparatus. [Figure 7] 5A and 5B are diagrams illustrating a support structure for a rotation shaft of a driven roller. [Figure 8] FIG. 2 is a diagram illustrating a configuration of a pair of intermediate rollers. [Figure 9] FIG. 10 is a diagram illustrating a state in which the pair of intermediate rollers are spaced apart. [Figure 10] 10A and 10B are diagrams illustrating changes in the state of an intermediate roller and a reverse roller. DETAILED DESCRIPTION OF THE INVENTION
[0008] [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the following embodiments do not limit the present invention, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the present invention. Note that the same components will be described with the same reference numerals. Furthermore, the relative arrangements, shapes, etc. of the components described in the embodiments are merely examples, and are not intended to limit the scope of the present invention to only those.
[0009] <Recording device> A recording apparatus 1 according to an embodiment of the present invention will be described using Figures 1 to 3. Figure 1 is an external view of the recording apparatus 1 according to an embodiment of the present invention. Figure 2 is a cross-sectional view showing a sheet transport path in the recording apparatus 1. Figure 3 is a block diagram of a control unit 100 that controls the recording apparatus 1. The recording apparatus 1 has an overall rectangular parallelepiped shape. A touch panel display device 4 that accepts user operations is provided on the front of a housing 2 that forms the exterior of the recording apparatus 1. In the figures, arrows X, Y, and Z indicate the width, depth, and height directions of the recording apparatus 1, and are directions that intersect with each other (directions that are perpendicular to each other in this case). The same applies to arrows X, Y, and Z in other figures.
[0010] The recording device 1 according to the embodiment of the present invention is an inkjet type that records an image by ejecting ink onto a sheet using a recording head, which is a recording means. However, the present invention is also applicable to electrophotographic and line head type recording devices. Note that "recording" not only includes the formation of meaningful information such as characters and figures, but also broadly includes the formation of images, patterns, and the like on a sheet, whether meaningful or insignificant, regardless of whether they are visible to humans. Furthermore, although a sheet is assumed as the "recording medium" in this embodiment, it may also be cloth, plastic film, or the like.
[0011] The recording device 1 has a stacking section 9 on the bottom of a housing 2 for stacking sheets P. The transport paths for transporting sheets P stacked on the stacking section 9 to the recording section 8 are a supply path 11 and a transport path 12. The supply path 11 is provided with a second feed roller 24 and a first sensor 31, and is a transport path from the stacking section 9 to the junction 16. The transport path 12 is provided with a second sensor 32, and is a transport path from the junction 16 to main transport rollers 21, along which the sheet is transported in the transport direction. The main transport rollers 21 are a roller pair consisting of a drive roller and a driven roller. The recording section 8 is made up of a platen that supports the sheet in part of the transport path, a recording head 109, and a carriage that moves the recording head 109. Ink is supplied to the recording head 109 from an ink tank 3.
[0012] The conveying paths for conveying a sheet on which an image has been recorded in the recording unit 8 include a conveying path 13, a reversing path 14, and a discharge path 15. The conveying path 13 is a conveying path that extends downstream in the conveying direction of discharge rollers 22. The discharge rollers 22 are a roller pair consisting of a drive roller and a driven roller. The conveying path 13 is provided with a discharge branching section 18 and a reversing branching section 17. The discharge path 15 is a conveying path for conveying a sheet from the discharge branching section 18 of the conveying path 13 to the discharge section. The reversing path 14 is provided with an intermediate roller pair consisting of an intermediate roller 28 and a driven roller 27, and a fourth sensor 34, and connects the junction 16 of the conveying path 12 to the reversing branching section 17 of the conveying path 13. The sheet returns to the recording unit 8 with its front and back sides reversed by passing through the reversing path 14. The direction in which the sheet is conveyed through the reversing path 14 is referred to as the reversing direction.
[0013] The sheet P is supplied from the stacking unit 9 to the supply path 11 by a first feed roller 23, and is further conveyed to the conveying path 12 by a second feed roller 24 provided in the supply path 11. The sheet P conveyed to the conveying path 12 is conveyed to the recording unit 8 by a main conveying roller 21. In the recording unit 8, an image is recorded on the sheet by a recording operation that alternates between an ejection operation in which the recording head 109 moves back and forth in the X direction while ejecting ink, and a conveying operation in which the main conveying roller 21 conveys the sheet in the conveying direction. The sheet P with the image recorded is conveyed by the main conveying roller 21 and discharge rollers 22 to the conveying path 13 or the discharge path 15 downstream in the conveying direction of the recording unit 8. A path switching unit 19 is provided between the discharge branching unit 18 and the reversing branching unit 17. The path switching unit 19 can switch the conveyance of the sheet P to the conveying path 13 or the discharge path 15 on the reversing roller 25 side.
[0014] In double-sided recording, in which recording is performed on both the front and back sides of a sheet, the sheet P transported to the transport path 13 is transported to the reverse path 14 by the reverse rollers 25. At this time, the path switching unit 19 switches the transport of the sheet P so as to guide the sheet P to the reverse path 14. The sheet P transported to the reverse path 14 is transported to the transport path 12 by the intermediate rollers 27 provided in the reverse path 14, and is further transported to the recording unit 8 by the main transport rollers 21. The sum of the transport path lengths of the transport path 12 and the reverse path 14 is approximately the same length as the sheet length of the largest sheet.
[0015] The recording device 1 has a plurality of drive sources for driving the first feed roller 23, the second feed roller 24, the main transport roller 21, the discharge roller 22, the reversing roller 25, and the intermediate roller 27. Each roller is rotated by the drive source in a forward direction for transporting the sheet P in the transport direction from the main transport roller 21 to the discharge roller 22, and in a reverse direction opposite thereto, to transport the sheet P.
[0016] The first feed roller 23 and the second feed roller 24 are driven by the same drive source, and the drive transmission to the first feed roller 23 is interrupted when the sheet P reaches the second feed roller 24. A missing tooth gear, a clutch mechanism, or the like is used as a configuration for interrupting the drive transmission. The main transport roller 21 and the discharge roller 22 are driven by the same drive source, and the reversing roller 25 and the intermediate roller 27 each have a drive source that can drive them independently.
[0017] The control unit 100 is a control circuit that controls the operation of each mechanical unit of the recording apparatus 1. The CPU 101 controls the entire recording apparatus 1. The controller 102 assists the CPU 101 and controls various motors 107 and the recording head 109 according to the detection results of various sensors 105. The ROM 103 stores various data and control programs for the CPU 101. The EEPROM 104 stores various data, etc. Note that the ROM 103 and EEPROM 104 may be other storage devices. The driver 106 drives elements that eject ink in the recording head 109, and the driver 108 drives the various motors 107. The various motors 107 include drive sources for each roller.
[0018] The various sensors 105 include an encoder that detects the position of the carriage, a rotary encoder that detects the amount of rotation of the main transport roller 21, and a sheet sensor that detects the leading or trailing edge of a sheet in the sheet transport path. The sheet sensors include a first sensor 31, a second sensor 32, a third sensor 33, and a fourth sensor 34. The timing of feeding or transporting the sheet P is determined by the detection results of the sheet sensors provided in the transport path. Each drive source starts and stops driving based on the detection results of the sheet sensors. In addition, a recording operation is started, for example, when a recording job is received from a host computer or when a recording job is generated to record an original document read by a reading device on a sheet.
[0019] <Transport control> Here, the transport control for transporting sheets will be described. The transport control will be described for the cases where recording is performed continuously on one side of multiple sheets, recording on both sides of one sheet, and recording on both sides of multiple sheets.
[0020] First, a sheet transport method for consecutively recording on one side of multiple sheets will be described. The sheet fed first is referred to as the preceding sheet P1 (first sheet), and the sheet fed after the preceding sheet P1 is referred to as the succeeding sheet P2 (second sheet). The preceding sheet P1 fed from the stacking unit 9 is transported through the supply path 11 and then the transport path 12, and reaches the recording unit 8. After an image is recorded on the first side (front side) of the preceding sheet P1 in the recording unit 8, the preceding sheet P1 is discharged from the discharge path 15. During this process, when the preceding sheet P1 has been transported a predetermined distance after the trailing edge of the preceding sheet P1 is detected by the first sensor 31 of the supply path 11, the succeeding sheet P2 is fed from the stacking unit 9. After an image is recorded on the first side (front side) of the fed succeeding sheet P2 in the recording unit 8, the succeeding sheet P2 is discharged from the discharge path 15. By repeating this sheet transport operation and the recording operation, single-sided recording on multiple sheets can be performed.
[0021] Next, a method for transporting a sheet P when images are recorded on both sides of a single sheet will be described. A sheet P1 fed from the stacking unit 9 is transported in this order through a supply path 11 and a transport path 12, and reaches the recording unit 8. After an image is recorded on the first side, which is the front side, of the sheet P1 in the recording unit 8, the sheet P1 is transported to a transport path 13. After a third sensor 33 provided on the transport path 13 detects the trailing end of the sheet P1 in the transport direction, the drive direction of the reversing roller 25 is switched, and the sheet P1 is transported to a reversing path 14. Thereafter, the sheet P1 with the image recorded on the front side is transported from the reversing path 14 to the transport path 12 and reaches the recording unit 8. After an image is recorded on the second side, which is the back side, of the sheet P1 in the recording unit 8, the sheet P1 is transported to a discharge path 15.
[0022] Next, a method for transporting a sheet P when images are continuously recorded on both sides of multiple sheets will be described. FIG. 4 shows the state of sheet transport when performing double-sided recording on multiple sheets. The order in which the sheets are transported is the first sheet P1, the second sheet P2, and the third sheet P3. The first sheet P1 fed from the stacking unit 9 is transported through the supply path 11 and the transport path 12, in that order, and reaches the recording unit 8. After an image is recorded on the first side (the obverse side) of the first sheet P1 in the recording unit 8, the first sheet P1 is transported to the transport path 13. During this process, when the first sheet P1 has been transported a predetermined distance after the trailing edge of the first sheet P1 is detected by the first sensor 31 provided in the supply path 11, the second sheet P2 is fed from the stacking unit 9 (FIG. 4A). After the leading edge of the second sheet P2 is detected by the first sensor 31, the second sheet P2 is transported a predetermined distance and then stops at the transport path 12. Meanwhile, after the trailing edge of the first sheet P1 in the conveying direction is detected by the third sensor 33 on the conveying path 13, the drive direction of the reversing rollers 25 is switched, and the first sheet P1 is conveyed to the reversing path 14 (FIG. 4B). During this process, the first sheet P1 is conveyed from the conveying path 13 toward the reversing path 14, and the leading edge of the first sheet P1 is detected by the third sensor 33. After that, when the first sheet P1 is conveyed a predetermined distance on the reversing path 14, the second sheet P2, which has been stopped on the conveying path 12, is conveyed to the recording unit 8 (FIG. 4C). After the leading edge of the first sheet P1 is detected by the fourth sensor 34 provided on the reversing path 14, the first sheet P1 is conveyed a predetermined distance and stops on the conveying path 12. At this time, the second sheet P2 and the first sheet P1, which have been recorded in the recording unit 8 and are conveyed to the conveying path 13, overlap in an area upstream of the second sensor 32 provided on the conveying path 12 from the junction 16. The first sheet P1 remains stopped on the conveying path 12 until the image recording on the first side of the second sheet P2 is completed.
[0023] As the image recording on the second sheet P2 progresses, the trailing edge of the second sheet P2 in the conveyance direction is detected by the second sensor 32. After that, when the second sheet P2 has been conveyed a predetermined distance, the stopped first sheet P1 is conveyed to the recording unit 8. An image is recorded on the second side of the first sheet P1, which is the reverse side of the first side of the first sheet P1, in the recording unit 8, and the first sheet P1 is conveyed to the discharge path 15. Meanwhile, after the trailing edge of the second sheet P2 in the conveyance direction is detected by the third sensor 33, the second sheet P2 is conveyed to the reversing path 14 by switching the drive direction of the reversing roller 25. During this process, the first sheet P1 is conveyed a predetermined distance after the trailing edge of the first sheet P1 in the conveyance direction is detected by the second sensor 32. At this time, the third sheet P3 is fed from the stacking unit 9. The third sheet P3 is conveyed from the supply path 11 to the conveying path 12 and reaches the recording unit 8. Furthermore, the first surface, which is the obverse side of the third sheet P3, is recorded in the recording unit 8 and then conveyed to the conveying path 13. Meanwhile, the second sheet P2 is conveyed from the reversing path 14 to the conveying path 12, and the leading edge of the second sheet P2 in the reversing direction is detected by the fourth sensor 34. After that, the second sheet P2 is conveyed a predetermined distance and stops on the conveying path 12. At this time, the third sheet P3 and the second sheet P2 overlap in an area upstream of the second sensor 32 provided on the conveying path 12 from the junction 16.
[0024] After the second sensor 32 detects the trailing edge of the third sheet P3 in the conveyance direction, the third sheet P3 is conveyed a predetermined distance. At this time, the stopped second sheet P2 is conveyed to the recording unit 8, where an image is recorded on the second side of the second sheet P2. The second sheet P2 is then conveyed to the discharge path 15. Meanwhile, after the third sensor 33 detects the trailing edge of the third sheet P3, the drive direction of the reversing rollers 25 is switched and the third sheet P3 is conveyed to the reversing path 14. The third sheet P3 is then conveyed from the reversing path 14 to the conveyance path 12 and the recording unit 8, where an image is recorded on the second side of the third sheet P3, and then conveyed to the discharge path 15.
[0025] Normally, the third sheet P3, whose first side is to be recorded, is transported to the transport path 12 before the second sheet P2, whose second side is to be recorded. However, if the density of the image to be recorded is high, if the driving source has heated up, or if the timing of feeding the third sheet P3 is delayed, the second sheet P2, whose second side is to be recorded, may be transported to the transport path 12 before the third sheet P3, whose first side is to be recorded.
[0026] <Clearing jammed sheets> When a sheet becomes jammed in the conveyance path, the CPU 101 displays a message on the display device 4 prompting the user to perform an operation to remove the jammed sheet. The content of the display differs depending on the position of the sheet in the conveyance path. Figure 5 shows the processing sequence for prompting the user to perform an operation. A sheet jam can be detected when the state of the sheet sensor does not change when various rollers are driven, or when the load on the motor exceeds a threshold.
[0027] In step S1, upon detecting that a sheet has been jammed, the CPU 101 starts processing.
[0028] In step S2, the CPU 101 determines whether the first sensor 31 of the supply path 11 has detected a sheet. If it has detected a sheet, the process proceeds to step S3. In step S3, the CPU 101 displays a message on the display device 4 urging the user to remove the U-turn guide 47, which will be described later. If the first sensor 31 has not detected a sheet, the process proceeds to step S4. In step S4, the CPU 101 displays a message on the display device 4 urging the user to remove the sheet from the discharge path 15. In step S5, the display continues to be displayed on the display device 4 until the first sensor 31 no longer detects a sheet.
[0029] In step S6, the CPU 101 determines whether a sheet has jammed during double-sided recording, in which images are recorded on both sides of a sheet. If double-sided recording was in progress, there is a possibility that a sheet is present in the reverse path 14, and the process proceeds to step S7. In step S7, the CPU 101 determines whether the fourth sensor 34 of the reverse path 14 has detected a sheet. If the fourth sensor 34 has detected a sheet, this means that a sheet is present in the reverse path 14, as shown in FIG. 4(C), and the process proceeds to step S8. If the fourth sensor 34 has not detected a sheet, the process proceeds to step S9.
[0030] In step S8, the CPU 101 displays on the display device 4 a message urging the user to move the shaft support guide 46 (described later) and process the sheet. This message is displayed until the fourth sensor 34 no longer detects the sheet in step S10.
[0031] In step S9, the CPU 101 determines whether the third sensor 33 detects a sheet. If the third sensor 33 detects a sheet, the sheet is located in the reverse path 14, as shown in FIG. 4B, and the process proceeds to step S11.
[0032] In step S11, the CPU 101 displays on the display device 4 a message urging the user to move the arm support member 45, which will be described later. On the other hand, if the third sensor 33 does not detect a sheet, in step S12, the CPU 101 displays on the display device 4 a message urging the user to process the sheet from the discharge path 15. These messages are displayed until the third sensor 33 no longer detects a sheet in step S13. If the sheet is no longer detected, the process ends in step S14.
[0033] <Configuration of the intermediate roller pair> When a sheet is jammed while being sandwiched between the pair of intermediate rollers, the user separates the pair of intermediate rollers to remove the sheet. In this embodiment, the pair of intermediate rollers is composed of an intermediate roller 27 and a driven roller 28, and is switchable between a first state in which the sheet can be conveyed and a second state in which the sheet can be removed. In the first state, the intermediate roller 27 and the driven roller 28 press against each other. On the other hand, in the second state, the intermediate roller 27 is separated from the driven roller 28. The configuration of the pair of intermediate rollers will now be described with reference to FIGS. 6 to 8.
[0034] FIG. 6 shows the internal configuration of the recording device 1. FIG. 6(A) is a perspective view of the recording device 1 from the rear, and FIG. 6(B) is a cross-sectional view of the recording device 1 from the front to the rear. The recording device 1 is provided with a side plate 48 on one side of the sheet width direction and a side plate 49 on the other side. The sheet is transported between the side plates 48 and 49. The rotation shaft 28a of the driven roller 28 passes through movement restriction holes (48a, 49a) provided in the side plate 48 and the side plate 49, respectively. Note that only one of the side plates 48 or 49 will be described here as necessary.
[0035] In the first state in which a sheet can be conveyed, the rotating shaft 28a of the driven roller 28 is supported from below in the vertical direction by a V-shaped groove formed by the upper inclined surface 41a of the shaft support arm 41 and the side inclined surface 46a of the shaft support guide 46. In this state, the rotating shaft 28a does not abut against the movement-restricting hole 48a formed in the side plate 48. The shaft support arm 41 and the shaft support guide 46 are movable members that move in different directions. The second state is achieved by the movement of the shaft support arm 41 or the shaft support guide 46, which are movable members, in which the intermediate roller pair is separated. Therefore, the shaft support arm 41 and the shaft support guide 46 are switching devices that switch between the first state and the second state. The upper surface of the shaft support guide 46 and the upper surface of the reverse path guide 50 form part of the reverse path 14. The reverse path guide 50 is fixed, and the shaft support guide 46 can move in a direction away from the reverse path guide 50.
[0036] The operation of removing the U-turn guide 47 in step S3 described above can be performed by tilting the display device 4 and moving the U-turn guide 47 toward the front of the recording device 1. The operation of removing the shaft support guide in step S8 can be performed by removing the U-turn guide 47 and then moving the shaft support guide 46 in the same direction as the U-turn guide 47. The arm support member 45 is formed integrally with the stacking unit 9, and can move together with the stacking unit 9 toward the front of the recording device 1. The arm support member 45 may also be configured to move toward the rear of the recording device 1. In this case, sheet jams can be cleared from multiple directions.
[0037] 7 is a diagram showing a support configuration for the rotating shaft 28a of the driven roller 28. The rotating shaft 28a of the driven roller 28 is supported at different axial positions by shaft support arms (41, 42) and a shaft support guide 46 located on both ends in the sheet width direction. The rotating shaft 28a of the driven roller 28 is made lighter by thinning the members except for the portions supported by the shaft support arms (41, 42) and the shaft support guide 46.
[0038] FIG. 8 is a diagram showing details of the support structure for the rotation shaft 28a of the driven roller 28. Note that the movement restriction hole 48a is projected in the cross-sectional view. The rotation shaft 28a of the driven roller 28 is supported from below in the vertical direction by the upper inclined surface 41a of the shaft support arm 41 and the side inclined surface 46a of the shaft support guide 46. The roller holding member 29 is biased by a spring (not shown) such that the end portion 29b moves vertically upward and the intermediate roller 27 moves vertically downward, with the rotation shaft 29a as the center of rotation. Therefore, when the driven roller 28 is lifted vertically upward, the driven roller 28 is pressed by the intermediate roller 27. In other words, the intermediate roller 27 is supported by the driven roller 28. Therefore, the sheet is sandwiched between the intermediate roller 27 and the driven roller 28 and is conveyed by the rotation of the intermediate roller 27.
[0039] On the other hand, Figure 9 shows a second state in which the intermediate roller pair is separated. Because the intermediate roller pair is separated, a sheet cannot be conveyed. The positions where the rotation shaft 28a of the driven roller 28 abuts against and is supported by other members are indicated by black circles. The arrows indicate the directions in which the rotation shaft 28a of the driven roller 28, the shaft support arm 41, or the shaft support guide 46 moves. Figure 9(A) shows a state in which the shaft support arm 41 moves downward. When the arm support member 45 is moved from the first state in Figure 8, the position of the shaft support arm 41 moves downward in the vertical direction. As a result, the rotation shaft 28a of the driven roller 28 moves downward along the side inclined surface 46a of the shaft support guide 46 and stops by abutting against the movement restriction hole 48a of the side plate 48. At this time, the driven roller 28 has moved downward in the vertical direction, resulting in a second state in which it is separated from the intermediate roller 27. As will be described later, the conveying path is opened from the conveying path 13 to the pair of intermediate rollers of the reversing path 14, so that the sheet can be removed. In this way, by moving the shaft support guide 46, which is the moving member of the switching means, it is possible to switch between the first state and the second state.
[0040] 9(B) shows a state in which the shaft support guide 46 moves toward the front. When the shaft support guide 46 is moved toward the front of the recording device 1 from the first state, the rotating shaft 28a of the driven roller 28 moves downward along the upper inclined surface 41a of the shaft support arm 41. As a result, the rotating shaft 28a comes into contact with the movement restricting hole 48a formed in the side plate 48 and stops. At this time, the driven roller 28 moves downward in the vertical direction, and thus enters a second state in which it is separated from the intermediate roller 27. Because the driven roller 28 moves along the U-turn guide 47, the conveying path is opened from the pair of intermediate rollers of the reversing path 14 to the junction 16. In this way, the first state and the second state can be switched by moving the shaft support arm 41, which is the moving member of the switching means.
[0041] In this example, the reversing path guide 50 is fixed, and the shaft support arm 41 moves vertically. However, something equivalent to the upper slope 41a of the shaft support arm 41 may be provided on the slope of the reversing path guide 50. In the first state, the rotating shaft 28a is supported by the slope and the side slope 46a of the reversing path guide 50. The second state is achieved by the reversing path guide 50 moving to the rear side of the recording device 1, opposite the shaft support guide 46. With this configuration, the user can remove the sheet from multiple directions.
[0042] The lower ends of the slopes of the shaft support arm 41 and the shaft support guide 46 are positioned vertically below the position where the shaft of the intermediate driven roller 28 stops lowering due to the movement restriction hole 48a of the side plate 48. The reverse path guide 50 is positioned and shaped so as not to interfere with the movement of the driven roller 28 or the members associated with it.
[0043] When the shaft support arm 41 and the shaft support guide 46 are returned to their original positions, the rotation shaft 28a of the driven roller 28 is lifted upward by the upper inclined surface 41a or the side inclined surface 46a. At this time, the driven roller 28 supports the intermediate roller 27 and enters a first state in which it can transport a sheet. The vertical movement range of the shaft support arm 41 is restricted by the elongated hole 41b provided on the side surface and the boss 44 of the side plate 48.
[0044] Next, Figure 10 shows the state changes of the intermediate roller pair and the reverse roller pair. The intermediate roller pair is supported by the shaft support arm 41 and shaft support guide 46, and the reverse roller pair is supported by the shaft support arm 43. The lower surfaces of the shaft support arm 41 and the shaft support arm 43 are supported by the upper surface of the arm support member 45. The upper inclined surface 41a of the shaft support arm 41 supports the rotation shaft 28a of the driven roller 28. The upper portion of the shaft support arm 43 supports the rotation shaft 25a of the reverse roller 25. The upper surface of the arm support member 45 is cam-shaped to support the shaft support arm 41 and the shaft support arm 43, respectively. By moving the arm support member 45 in the X direction, the shaft support arm 41 and the shaft support arm 43 can be moved up and down. The arm support member 45 is integrated with the members that make up the loading unit 9. As the arm support member 45 moves, the shaft support arm 43 moves vertically, switching between two states: pressing and separating the reverse roller 25 and the reverse driven roller 26. When the reversing roller 25 and the reversing driven roller 26 are pressing against each other, this is a first state in which a sheet can be conveyed by driving the reversing roller 25. When the reversing roller 25 and the reversing driven roller 26 are separated from each other, this is a second state in which a sheet can be removed. Therefore, when a sheet is sandwiched between the pair of reversing rollers and the pair of intermediate rollers, the user can remove the sheet by moving the arm support member 45. The vertical movement range of the shaft support arm 43 is restricted by an elongated hole provided on the side surface and a boss on the side plate 48.
[0045] The present invention may be used not only for a configuration in which the intermediate roller pair is switched between the first state and the second state, but also for a configuration in which the main transport roller and the discharge roller are switched between the first state and the second state. Two moving members that move in different directions are sufficient, and these can remove the sheet depending on its position in the transport path. Furthermore, the shaft support guide 46 does not have to be limited to a member that constitutes the reversing path 14.
[0046] As described above, it is possible to provide a recording device that can separate the roller pair by using a plurality of members. [Explanation of symbols]
[0047] 27 Intermediate roller 28 Driven roller 41 Axis support arm 46 Shaft support guide
Claims
1. A roller pair for conveying a sheet by clamping it between a first roller and a second roller below the first roller; a first moving member that moves in a first direction to switch from a first state in which the pair of rollers holds a sheet to a second state in which the pair of rollers is separated from each other; a second moving member that switches from the first state to the second state by moving in a second direction different from the first direction, A recording device that records an image on a sheet by a recording means, In the first state, the first moving member and the second moving member support the second roller.
2. 2. The recording apparatus according to claim 1, wherein the first moving member and the second moving member support a rotation shaft of the second roller in the first state.
3. 3. The recording apparatus according to claim 2, further comprising a side plate through which the rotating shaft passes, which does not come into contact with the rotating shaft in the first state, and which comes into contact with the rotating shaft in the second state.
4. a conveying path including a first guide that supports a sheet and is movable, and a second guide that supports the sheet and is fixed; 4. The recording apparatus according to claim 1, wherein the first moving member is provided on the first guide.
5. 5. The recording apparatus according to claim 1, further comprising a support member that moves between a position where the second moving member is supported and a position where the second moving member is not supported.
6. 6. The recording apparatus according to claim 5, wherein the support member moves together with a loading section that loads sheets on which an image is to be recorded.
7. 7. The recording apparatus according to claim 1, wherein the pair of rollers is disposed on a reversing path for returning the sheet on which the image has been recorded to the recording means.
8. a first conveying path for conveying a sheet toward the recording means; a second conveying path for conveying a sheet on which the recording unit has recorded, 8. The recording apparatus according to claim 7, wherein the reversing path connects the second transport path and the first transport path.
9. a pair of reversing rollers disposed in the second conveying path, 9. The recording apparatus according to claim 8, wherein the pair of reversing rollers sandwich the sheet when in the first state, and are separated from each other when in the second state.
10. 10. The recording apparatus according to claim 8, wherein the second transport path is connected to a discharge path for discharging the sheet on which the image is recorded.