Recording device
The recording device addresses the challenge of sheet jamming by employing a pair of rollers with movable components that switch between gripping and separating states, ensuring easy sheet removal across various conveyance path positions.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-03-23
- Publication Date
- 2026-05-14
AI Technical Summary
Existing recording devices face difficulties in removing sheets jammed in the conveyance path, particularly when the sheet is in the reversing path, as the slide member operation is ineffective in such scenarios.
The recording device employs a pair of rollers with a first and second moving member that can switch between gripping and separating states, utilizing a rotating shaft supported through a side plate, allowing for efficient separation of the roller pair using multiple components.
This configuration enables effective separation of the roller pair, facilitating easy removal of jammed sheets regardless of their position in the conveyance path, enhancing the device's operational efficiency.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a recording apparatus that records an image on a conveyed sheet.
Background Art
[0002] In a recording apparatus that records an image on a sheet, when the conveyed sheet is jammed in the conveyance path, it is necessary to remove the sheet. Patent Document 1 describes a recording apparatus that can record an image on the front surface of a sheet conveyed from a stacking unit through a conveyance path and on the back surface of the sheet reversed through the conveyance path. When the sheet is jammed in the conveyance path in this recording apparatus, the user can remove the sheet by separating the conveyance roller pair with a slide member.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] However, in the configuration described in Patent Document 1, when the sheet is jammed in the conveyance path, the slide member is operated regardless of the position of the sheet in the conveyance path. In this apparatus, when the sheet is in the reversing path that reverses the sheet, it is difficult to remove the sheet with the slide member. Thus, the mechanism for separating the conveyance roller pair needed further improvement. An object of the present invention is to provide a recording apparatus capable of separating a roller pair using a plurality of members.
Means for Solving the Problems
[0005] The recording device of the present invention comprises a pair of rollers that grip and transport a sheet between a first roller and a second roller located below the first roller; a first moving member that moves in a first direction to switch from a first state in which the sheet is gripped by the pair of rollers to a second state in which the pair of rollers is separated; and a second moving member that moves in a second direction different from the first direction to switch from the first state to the second state, wherein the recording device records an image on a sheet using a recording means, wherein in the first state, the first moving member and the second moving member are separated by the second roller axis of rotation Support The rotating shaft is provided through a side plate through which the rotating shaft passes, and the side plate does not contact the rotating shaft in the first state, but contacts the rotating shaft in the second state. It is characterized by the following: [Effects of the Invention]
[0006] According to the present invention, a recording device can be provided that allows a pair of rollers to be separated using multiple components. [Brief explanation of the drawing]
[0007] [Figure 1] This is an external view of the recording device. [Figure 2] This is a cross-sectional view showing the transport path for the sheet in the recording device. [Figure 3] This is a block diagram of the control unit. [Figure 4] This diagram shows how sheets are transported when recording on both sides of multiple sheets. [Figure 5] This is a processing sequence that prompts the user to remove the sheet. [Figure 6] This is a diagram showing the internal configuration of the recording device. [Figure 7] This diagram shows the support configuration for the rotation axis of the driven roller. [Figure 8] This diagram shows the configuration of the intermediate roller pair. [Figure 9] This diagram shows the intermediate roller pair in a separated state. [Figure 10] This diagram shows the changes in state of the intermediate roller and the reversing roller. [Modes for carrying out the invention]
[0008] [Embodiment] Embodiments of the present invention will be described below with reference to the drawings. Note that the following embodiments are not intended to limit the present invention, and not all combinations of features described in these embodiments are necessarily essential to the solutions of the present invention. Identical components will be denoted by the same reference numerals. Furthermore, the relative arrangements, shapes, etc., of the components described in the embodiments are merely illustrative and are not intended to limit the scope of this invention to them alone.
[0009] <Recording device> A recording device 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 device 1 according to an embodiment of the present invention. Figure 2 is a cross-sectional view showing the sheet transport path of the recording device 1. Figure 3 is a block diagram of the control unit 100 that controls the recording device 1. The recording device 1 as a whole has a rectangular parallelepiped shape. A touch panel type display device 4 that accepts user operation is provided on the front of the housing 2 that forms the exterior of the recording device 1. In the figures, arrows X, Y, and Z indicate the width direction, depth direction, and height direction of the recording device 1, and are directions that intersect each other (in this case, directions that are orthogonal to each other). The same applies to arrows X, Y, and Z in the other figures.
[0010] The recording device 1 according to an embodiment of the present invention is an inkjet method 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 recording devices. The term "recording" broadly includes not only the formation of meaningful information such as characters and figures, but also the formation of images, patterns, etc., on a sheet, regardless of whether they are meaningful or not, and does not depend on whether they are manifested in a way that humans can perceive visually. Furthermore, while a sheet-like material is assumed as the "recording medium" in this embodiment, it may be cloth, plastic film, etc.
[0011] The recording device 1 has a loading section 9 at the bottom of the housing 2 for loading sheets P. The transport paths for transporting the sheets P loaded in the loading section 9 to the recording unit 8 are a supply path 11 and a transport path 12. The supply path 11 is equipped with a second feeding roller 24 and a first sensor 31, and is a transport path from the loading section 9 to the merging section 16. The transport path 12 is equipped with a second sensor 32, and is a transport path from the merging section 16 to the main transport roller 21, through which the sheets are transported in the transport direction. The main transport roller 21 is a roller pair consisting of a drive roller and a driven roller. The recording unit 8 consists of a platen that supports the sheets 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 the ink tank 3.
[0012] The transport paths for transporting the sheet on which the image has been recorded in the recording unit 8 are the transport path 13, the reversal path 14, and the discharge path 15. The transport path 13 is a transport path that extends downstream in the transport direction of the discharge roller 22. The discharge roller 22 is a roller pair composed of a drive roller and a driven roller. The transport path 13 is provided with a discharge branch section 18 and a reversal branch section 17. The discharge path 15 is a transport path for transporting the sheet from the discharge branch section 18 of the transport path 13 to the discharge section. The reversal path 14 is provided with an intermediate roller pair composed of an intermediate roller 28 and a driven roller 27 and a fourth sensor 34, and connects the junction section 16 of the transport path 12 and the reversal branch section 17 of the transport path 13. The sheet returns to the recording unit 8 with its front and back sides reversed by passing through the reversal path 14. The direction in which the sheet is transported through the reversal path 14 is defined as the reversal direction.
[0013] Sheet P is supplied from the loading unit 9 to the supply path 11 by the first feed roller 23, and is further conveyed to the conveyance path 12 by the second feed roller 24 provided in the supply path 11. The sheet P conveyed to the conveyance path 12 is conveyed to the recording unit 8 by the main conveyance roller 21. In the recording unit 8, an image is recorded on the sheet by a recording operation in which the recording head 109 alternately performs a discharge operation of reciprocating in the X direction while discharging ink and a conveyance operation of conveying the sheet in the conveyance direction by the main conveyance roller 21. The sheet P on which the image has been recorded is conveyed to the downstream conveyance path 13 or the discharge path 15 in the conveyance direction of the recording unit 8 by the main conveyance roller 21 and the discharge roller 22. A path switching unit 19 is provided between the discharge branch unit 18 and the inversion branch unit 17. The path switching unit 19 can switch the conveyance of the sheet P to the conveyance path 13 or the discharge path 15 on the side of the inversion roller 25.
[0014] During double-sided recording in which recording is performed on both the front and back surfaces of the sheet, the sheet P conveyed to the conveyance path 13 is conveyed to the inversion path 14 by the inversion roller 25. At this time, the path switching unit 19 switches the conveyance of the sheet P so as to guide the sheet P to the inversion path 14. The sheet P conveyed to the inversion path 14 is conveyed to the conveyance path 12 by the intermediate roller 27 provided in the inversion path 14, and is further conveyed to the recording unit 8 by the main conveyance roller 21. Note that the sum of the conveyance path lengths of the conveyance path 12 and the inversion path 14 is approximately the same as the sheet length of the maximum sheet.
[0015] The recording apparatus 1 has a plurality of drive sources for driving the first feed roller 23, the second feed roller 24, the main conveyance roller 21, the discharge roller 22, the inversion roller 25, and the intermediate roller 27. Each roller rotates in a normal rotation direction of conveying in the conveyance direction from the main conveyance roller 21 toward the discharge roller 22 by the drive source and a reverse rotation direction opposite thereto, and conveys the sheet P.
[0016] The first feed roller 23 and the second feed roller 24 are driven by the same drive source, and when the sheet P reaches the second feed roller 24, the drive transmission of the first feed roller 23 is interrupted. A missing tooth gear, a clutch mechanism, or the like is used for the configuration in which the drive transmission is interrupted. The main conveyance roller 21 and the discharge roller 22 are driven by the same drive source, and the reverse roller 25 and the intermediate roller 27 each have a drive source that can be driven independently.
[0017] The control unit 100 is a control circuit that controls the operations of the respective mechanism parts of the recording apparatus 1. The CPU 101 controls the entire recording apparatus 1. The controller 102 assists the CPU 101 and controls the various motors 107 and the recording head 109 according to the detection results of the various sensors 105. Various data and the control program of the CPU 101 and the like are stored in the ROM 103. Various data and the like are stored in the EEPROM 104. Note that the ROM 103 and the EEPROM 104 may be other storage devices. The driver 106 drives the element that discharges the ink of the recording head 109, and the driver 108 drives the various motors 107. The various motors 107 include the drive sources of the respective rollers.
[0018] The various sensors 105 include an encoder that detects the position of the carriage, a rotary encoder that detects the rotation amount of the main conveyance roller 21, a sheet sensor that detects the leading end or the trailing end of the sheet in the sheet conveyance path, and the like. The sheet sensor includes the first sensor 31, the second sensor 32, the third sensor 33, and the fourth sensor 34. The timing of feeding or conveying the sheet P is determined by the detection results of the sheet sensors provided in the conveyance path. Each drive source starts and stops driving based on the detection results of the sheet sensors. Also, the recording operation is started, for example, when a recording job is received from a host computer or when a recording job for recording a manuscript read by a reading device on a sheet occurs.
[0019] <Conveyance Control> Here, we will explain the transport control for transporting the sheets. We will explain the transport control for cases where data is recorded continuously on one side of multiple sheets, where data is recorded on both sides of a single sheet, and where data is recorded continuously on both sides of multiple sheets.
[0020] First, let's explain the method for transporting sheets when recording continuously on one side of multiple sheets. The sheet that is fed first is called the leading sheet P1 (first sheet), and the sheet that is fed after the leading sheet P1 is called the following sheet P2 (second sheet). The leading sheet P1, fed from the loading unit 9, is transported in the order of the supply path 11 and the transport path 12, and reaches the recording unit 8. After the image is recorded on the first surface, which is the front surface of the leading sheet P1, in the recording unit 8, the leading sheet P1 is discharged from the discharge path 15. In this process, when the leading sheet P1 has been transported a predetermined amount after the rear end of the leading sheet P1 is detected by the first sensor 31 in the supply path 11, the following sheet P2 is fed from the loading unit 9. After the following sheet P2 is transported, an image is recorded on its first surface, which is the front surface, in the recording unit 8, and then it is discharged from the discharge path 15. By repeating this transport operation to transport the sheets and the recording operation to record images on the sheets, one-sided recording of multiple sheets can be performed.
[0021] Next, the method for transporting a sheet P when recording images on both sides of a single sheet will be described. The sheet P1, fed from the loading unit 9, is transported in the order of supply path 11 and transport path 12 to reach the recording unit 8. After an image is recorded on the first surface, which is the front surface of the sheet P1, in the recording unit 8, the sheet P1 is transported to the transport path 13. After the rear end of the sheet P1 in the transport direction is detected by the third sensor 33 provided in the transport path 13, the sheet P1 is transported to the reversal path 14 by switching the drive direction of the reversal roller 25. After that, the sheet P1 with the image recorded on the front surface is transported from the reversal path 14 to the transport path 12 and reaches the recording unit 8. After an image is recorded on the second surface, which is the back surface of the sheet P1, in the recording unit 8, the sheet P1 is transported to the discharge path 15.
[0022] Furthermore, the method for transporting sheets P when recording images continuously on both sides of multiple sheets will be explained. Figure 4 shows the transport of sheets 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, supplied from the loading unit 9, is transported in the order of the supply path 11 and the transport path 12 to reach the recording unit 8. After an image is recorded on the first surface, which is the front surface of the first sheet P1, in the recording unit 8, the first sheet P1 is transported to the transport path 13. In this process, after the rear end of the first sheet P1 is detected by the first sensor 31 provided in the supply path 11 and the first sheet P1 has been transported a predetermined amount, the second sheet P2 is supplied from the loading unit 9 (Figure 4(A)). After the leading edge of the second sheet P2 is detected by the first sensor 31, the second sheet P2 is transported a predetermined amount and then stops in the transport path 12. Meanwhile, after the rear end of the first sheet P1 in the transport direction is detected by the third sensor 33 on the transport path 13, the first sheet P1 is transported to the reversal path 14 by switching the drive direction of the reversal roller 25 (Figure 4(B)). In this process, the first sheet P1 is transported from the transport path 13 towards the reversal path 14, and the leading edge of the first sheet P1 is detected by the third sensor 33. After the first sheet P1 has been transported a predetermined amount in the reversal path 14, the second sheet P2, which was stopped in the transport path 12, is transported to the recording unit 8 (Figure 4(C)). After the leading edge of the first sheet P1 is detected by the fourth sensor 34 provided in the reversal path 14, it is transported a predetermined amount and stops in the transport path 12. At this time, the second sheet P2, which is recorded in the recording unit 8 and transported to the transport path 13, and the first sheet P1 overlap in the area upstream of the second sensor 32 provided in the transport path 12 from the merging section 16. The first sheet P1 remains stopped on the transport path 12 until the recording of the image onto the first surface of the second sheet P2 is complete.
[0023] As the recording of the image on the second sheet P2 progresses, the rear end of the second sheet P2 in the transport direction is detected by the second sensor 32. After the second sheet P2 has been transported a predetermined amount, the first sheet P1, which had been stopped, is transported to the recording unit 8. In the recording unit 8, the image of the first sheet P1 is recorded on the second side, which is the back side of the first side of the first sheet P1, and then it is transported to the discharge path 15. Meanwhile, after the rear end of the second sheet P2 in the transport direction is detected by the third sensor 33, the second sheet P2 is transported to the reversal path 14 by switching the drive direction of the reversal roller 25. In this process, after the rear end of the first sheet P1 in the transport direction is detected by the second sensor 32, the first sheet P1 is transported a predetermined amount. At this time, the third sheet P3 is supplied from the loading unit 9. The third sheet P3 is transported from the supply path 11 to the transport path 12 and reaches the recording unit 8. Furthermore, the first surface of the third sheet P3 is recorded by the recording unit 8 and transported to the transport path 13. Meanwhile, the second sheet P2 is transported from the reversal path 14 to the transport path 12, and the leading edge of the second sheet P2 in the reversal direction is detected by the fourth sensor 34. After a predetermined amount has been transported, the second sheet P2 stops in the transport path 12. At this time, the third sheet P3 and the second sheet P2 overlap in the area upstream of the second sensor 32, which is provided on the transport path 12 from the merging section 16.
[0024] After the rear end of the third sheet P3 in the transport direction is detected by the second sensor 32, the third sheet P3 is transported a predetermined amount. At this time, the second sheet P2, which was stopped, is transported to the recording unit 8, where an image is recorded on the second surface of the second sheet P2. After that, the second sheet P2 is transported to the discharge path 15. Meanwhile, after the rear end of the third sheet P3 is detected by the third sensor 33, the third sheet P3 is transported to the reversing path 14 by switching the drive direction of the reversing roller 25. After that, the third sheet P3 is transported from the reversing path 14 to the transport path 12 and then to the recording unit 8, where an image is recorded on the second surface of the third sheet P3, and then it is transported to the discharge path 15.
[0025] Under normal circumstances, the third sheet P3, which records the first side, is transported to the transport path 12 before the second sheet P2, which records the second side. However, if the image density to be recorded is high, if the drive source heats up, or if the feeding timing of the third sheet P3 is delayed, the second sheet P2, which records the second side, may be transported to the transport path 12 before the third sheet P3, which records the first side.
[0026] <Handling sheet jams> If a sheet becomes jammed in the transport path, the CPU 101 displays a message on the display device 4 prompting the user to remove the jammed sheet. The content of the display varies depending on the position of the sheet in the transport path. Figure 5 shows the processing sequence for prompting the user to take action. A jammed sheet can be detected when the state of the sheet sensor does not change when various rollers are driven, or when the motor load exceeds a threshold.
[0027] In process S1, the CPU 101 detects that the sheet is jammed and starts processing.
[0028] In step S2, the CPU 101 determines whether the first sensor 31 in the supply path 11 detects a sheet. If it does, the process proceeds to step S3. In step S3, the CPU 101 displays a message on the display device 4 prompting the user to remove the U-turn guide 47, which will be described later. If the first sensor 31 does not detect a sheet, the process proceeds to step S4. In step S4, the CPU 101 displays a message on the display device 4 prompting the user to remove the sheet from the discharge path 15. In step S5, the display device 4 continues to display messages until the first sensor 31 no longer detects a sheet.
[0029] In step S6, the CPU 101 determines whether the sheet is jammed during double-sided recording, where images are recorded on both sides of the sheet. If double-sided recording is in progress, there is a possibility that the sheet is in the reversal path 14, and the process proceeds to step S7. In step S7, the CPU 101 determines whether the fourth sensor 34 of the reversal path 14 detects the sheet. If the fourth sensor 34 detects the sheet, it means that the sheet is in the reversal path 14 as shown in Figure 4(C), and the process proceeds to step S8. If the fourth sensor 34 does not detect the sheet, the process proceeds to step S9.
[0030] In step S8, the CPU 101 displays a message on the display device 4 prompting the user to move the axial support guide 46 (described later) to process the sheet. This message is displayed until the sheet is no longer detected by the fourth sensor 34 in step S10.
[0031] In step S9, the CPU 101 determines whether the third sensor 33 has detected a sheet. If the third sensor 33 has detected a sheet, it is located in the reversal path 14 as shown in sheet P1 in Figure 4(B), so the process proceeds to step S11.
[0032] In step S11, the CPU 101 displays a message on the display device 4 prompting the movement of 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 display device 4 displays a message prompting the processing of the sheet from the discharge passage 15. These messages are displayed until the third sensor 33 no longer detects a sheet in step S13. Once the sheet is no longer detected, the processing is terminated in step S14.
[0033] <Configuration of the intermediate roller pair> If a sheet becomes jammed while being held between the intermediate roller pair, the user will need to separate the intermediate roller pair to remove the sheet. In this embodiment, the intermediate roller pair consists of an intermediate roller 27 and a driven roller 28, and can be switched between a first state in which the sheet can be transported and a second state in which the sheet can be removed. In the first state, the intermediate roller 27 and the driven roller 28 are pressing 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 intermediate roller pair will now be explained using Figures 6 to 8.
[0034] Figure 6 shows the internal configuration of the recording device 1. Figure 6(A) is a perspective view of the recording device 1 from the rear, and Figure 6(B) is a cross-sectional view of the recording device 1 from the front to the back. The recording device 1 has a side plate 48 on one side in the width direction of the sheet and a side plate 49 on the other side. The sheet is transported between the side plate 48 and the side plate 49. The rotation axis 28a of the driven roller 28 passes through movement restricting holes (48a, 49a) provided in the side plate 48 and the side plate 49, respectively. Here, only one of the side plates 48 or 49 will be described as necessary.
[0035] In the first state, in which the sheet can be transported, the rotation axis 28a of the driven roller 28 is supported from below in the vertical direction by a V-shaped groove formed by the upper slope 41a of the shaft support arm 41 and the side slope 46a of the shaft support guide 46. At this time, the rotation axis 28a is not in contact with the movement restricting hole 48a provided in the side plate 48. Here, the shaft support arm 41 and the shaft support guide 46 are moving members that move in different directions. The movement of the moving member, either the shaft support arm 41 or the shaft support guide 46, results in a second state in which the intermediate roller pair is separated. Therefore, the shaft support arm 41 and the shaft support guide 46 are switching means for switching between the first state and the second state. Also, the upper surface of the shaft support guide 46 and the upper surface of the reversal path guide 50 form part of the reversal path 14. The reversal path guide 50 is fixed, and the shaft support guide 46 can move away from the reversal path guide 50.
[0036] The operation to remove 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 to the front side of the recording device 1. The operation to remove 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 loading section 9 and can be moved together with the loading section 9 to the front side of the recording device 1. The arm support member 45 may also be configured to move to the rear side of the recording device 1. In this case, sheet jams can be cleared from multiple directions.
[0037] Figure 7 shows the support configuration for the rotation shaft 28a of the driven roller 28. The rotation shaft 28a of the driven roller 28 is supported at different axial positions by the shaft support arms (41, 42) and shaft support guide 46 located at both ends in the sheet width direction. The rotation shaft 28a of the driven roller 28 is made lighter by making the members thinner except for the parts supported by the shaft support arms (41, 42) and shaft support guide 46.
[0038] Figure 8 shows the details of the support configuration for the rotation axis 28a of the driven roller 28. Note that the movement restriction hole 48a is projected in the cross-sectional view. The rotation axis 28a of the driven roller 28 is supported from below in the vertical direction by the upper slope 41a of the axis support arm 41 and the side slope 46a of the axis support guide 46. The roller holding member 29 is biased by a spring (not shown) with the rotation axis 29a as the center of rotation, the end 29b upward in the vertical direction, and the intermediate roller 27 downward in the vertical direction. Therefore, when the driven roller 28 is lifted upward in the vertical direction, the driven roller 28 is pressed against by the intermediate roller 27. In other words, the intermediate roller 27 is supported by the driven roller 28. Thus, the sheet is held between the intermediate roller 27 and the driven roller 28 and conveyed by the rotation of the intermediate roller 27.
[0039] Figure 9, on the other hand, shows the second state in which the intermediate roller pair is separated. Because the intermediate roller pair is separated, the sheet cannot be conveyed. The position where the rotation axis 28a of the driven roller 28 is supported by contacting another member is indicated by a black circle. The arrows indicate the direction in which the rotation axis 28a of the driven roller 28, the axis support arm 41, or the axis support guide 46 has moved. Figure 9(A) shows the state in which the axis support arm 41 has moved downward. When the arm support member 45 is moved from the first state in Figure 8, the position of the axis support arm 41 moves downward in the vertical direction. As a result, the rotation axis 28a of the driven roller 28 moves downward along the side slope 46a of the axis support guide 46 and stops when it comes into contact with the movement restricting hole 48a of the side plate 48. At this time, since the driven roller 28 has moved downward in the vertical direction, it is in the second state in which it is separated from the intermediate roller 27. As described later, the transport path is opened from the transport path 13 to the intermediate roller pair of the reversal path 14, allowing the sheet to be removed. By moving the shaft support guide 46, which is a moving member of the switching mechanism, the system can be switched between the first state and the second state.
[0040] On the other hand, Figure 9(B) shows the state in which the shaft support guide 46 is moved to the front side. When the shaft support guide 46 is moved to the front side of the recording device 1 from the first state, the rotation axis 28a of the driven roller 28 moves downward along the upper slope 41a of the shaft support arm 41. As a result, the rotation axis 28a comes into contact with the movement restriction hole 48a made in the side plate 48 and stops. At this time, since the driven roller 28 has moved downward in the vertical direction, it enters a second state in which it is separated from the intermediate roller 27. Because it is moving along the U-turn guide 47, the transport path is opened from the intermediate roller pair of the reversing path 14 to the merging section 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 configuration, the reversal path guide 50 is fixed, and the shaft support arm 41 moves vertically. However, a surface corresponding to the upper slope 41a of the shaft support arm 41 may be provided on the slope of the reversal path guide 50. In the first state, the rotating shaft 28a is supported by the slope and the side slope 46a of the reversal path guide 50. The second state is achieved when the reversal path guide 50 moves to the back side of the recording device 1 opposite the shaft support guide 46. In this configuration, the user can remove the sheet from multiple directions.
[0042] The lower ends of the inclined surfaces of the shaft support arm 41 and the shaft support guide 46 are located 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. Furthermore, the reversal path guide 50 is positioned and shaped so as not to interfere with the movement of the driven roller 28 or its associated components.
[0043] When the shaft support arm 41 and shaft support guide 46 are returned to their original positions, the rotation axis 28a of the driven roller 28 is lifted upward by the upper slope 41a or the side slope 46a. At this time, the driven roller 28 supports the intermediate roller 27 and enters a first state in which it can transport the 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 on the side plate 48.
[0044] Next, Figure 10 shows the state changes of the intermediate roller pair and the reversing roller pair. The intermediate roller pair is supported by the shaft support arm 41 and the shaft support guide 46, and the reversing 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 each supported by the upper surface of the arm support member 45. The upper slope 41a of the shaft support arm 41 supports the rotation axis 28a of the driven roller 28. The upper part of the shaft support arm 43 supports the rotation axis 25a of the reversing 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, and 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 section 9. As the arm support member 45 moves, the shaft support arm 43 moves vertically, and it is possible to switch between two states: pressing and separating the reversing roller 25 and the reversing driven roller 26. When the reversing roller 25 and the reversing driven roller 26 are pressing against each other, it is a first state in which the sheet can be transported by driving the reversing roller 25. When the reversing roller 25 and the reversing driven roller 26 are separated, it is a second state in which the sheet can be removed. Therefore, when the sheet is held 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 and a boss on the side plate 48.
[0045] The present invention may be used not only for a configuration that switches between a first state and a second state of an intermediate roller pair, but also for a configuration that switches between a first state and a second state of a main conveying roller and a discharge roller. Only two moving members that move in different directions are required, and these can be used to remove a sheet according to its position in the conveying path. Furthermore, the shaft support guide 46 is not limited to a member that constitutes the reversing path 14.
[0046] As described above, a recording device can be provided that allows the roller pair to be separated by using multiple components. [Explanation of Symbols]
[0047] 27 Intermediate roller 28 Driven roller 41 Axis support arm 46 Axis support guide
Claims
1. A pair of rollers that grips and transports a sheet between a first roller and a second roller located below the first roller, A first moving member that moves in a first direction to switch from a first state in which the sheet is gripped by the pair of rollers to a second state in which the pair of rollers is separated, The system includes 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 onto a sheet using a recording means, In the first state, the first moving member and the second moving member are provided with side plates that support the rotation axis of the second roller and through which the rotation axis passes. A recording device characterized in that the side plate does not come into contact with the rotation axis in the first state, and comes into contact with the rotation axis in the second state.
2. The transport path includes a first guide that supports and moves the sheet, and a second guide that supports and fixes the sheet. The recording device according to claim 1, characterized in that the first moving member is provided on the first guide.
3. A recording device according to any one of claims 1 to 2, comprising a support member that moves between a position supporting the second movable member and a position not supporting it.
4. The recording device according to claim 3, characterized in that the support member moves together with the loading section for loading sheets for recording images.
5. The recording apparatus according to any one of claims 1 to 4, characterized in that the pair of rollers is arranged in a reversal path for returning the sheet on which the image is recorded to the recording means.
6. A first transport path for transporting the sheet toward the recording means, The system includes a second transport path for transporting the sheet recorded by the recording means, The recording device according to claim 5, characterized in that the reversal path connects the second transport path and the first transport path.
7. The second transport path is equipped with a pair of reversing rollers, The recording device according to claim 6, characterized in that the pair of reversing rollers grips the sheet when in the first state and separates when in the second state.
8. The recording device according to claim 6 or 7, characterized in that the second transport path is connected to an discharge path for discharging a sheet on which an image has been recorded.