Feeding device and image forming device

Abstract

To provide a feeding device capable of securing usability for operation of each part of the device while preventing a foreign material from falling into a paper feeding port with a simpler configuration.SOLUTION: A feeding device according to the present disclosure includes: a housing; a supply port for feeding a recording medium to the housing; a first cover that is rotatable between a first position that closes the supply port and a second position that opens the supply port; a rotation unit that can rotate between a closed position for closing the housing and an open position for opening the housing, and a second cover that is rotatable in accordance with the movement of the rotation unit and that is capable of contacting the first cover via a first contact point, When the rotation unit is moved to the open position while the first cover is in the first position, the first cover rotates while contacting the second cover. In a triangle formed by the rotation axis of the first cover, the rotation axis of the second cover, and the first contact point, the interior angle of the first contact point is 90° or more, and the center of gravity of the first cover is located on the side of the rotation axis of the second cover.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The technology disclosed herein relates to a feeding device that feeds a medium and an image forming apparatus. [Background technology]

[0002] Some image forming devices that record on sheet material as a medium are equipped with a recording means that records on the sheet material and a reading means that reads an original, and have a paper feed port for supplying the sheet material to the recording means located at the upper rear of the device body.

[0003] There is also an image forming apparatus in which the reading means is arranged to be rotatable and openable relative to the upper part of the recording means (for example, Patent Document 1). The reading means includes a document cover that opens and closes a document table that reads a document, and the document cover is provided so as to be rotatable and openable relative to the reading means.

[0004] In addition, the paper feed port is provided with an opening / closing cover that serves as a lid to cover the paper feed port, and by covering the paper feed port with the opening / closing cover when the recording means is not in use, it is possible to prevent foreign objects from falling into the paper feed port.

[0005] However, when the image read by the reading means is recorded on a sheet material by the recording means, the reading means is operated with the access cover open and the paper feed opening open. For example, if the reading means is operated with a foreign object such as a paper clip placed on the document cover, the foreign object may fall into the paper feed opening provided at the upper rear of the device body.

[0006] Therefore, the image forming apparatus of Patent Document 1 is provided with a restricting member for preventing foreign objects from falling, separate from the opening / closing cover that covers the paper feed port. This restricting member is housed inside the opening / closing cover when the opening / closing cover is closed. This image forming apparatus is provided with a biasing member that biases the restricting member to a position that prevents foreign objects from falling when the opening / closing cover is open. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2017-226085 A [Patent Document 2] JP 2022-125796 A Summary of the Invention [Problem to be solved by the invention]

[0008] However, when the document cover is a thick rotating body such as the ADF (automatic document feeder) disclosed in Patent Document 2, it becomes difficult to prevent foreign objects from falling with the regulating member proposed in Patent Document 1. Also, in order to prevent foreign objects from falling into the paper feed port, in addition to the regulating member and the biasing member for biasing the regulating member, a configuration for operating these members is required, which may complicate the device configuration.

[0009] In view of the above-mentioned problems, the technique disclosed herein aims to provide a feeding device that can prevent foreign objects from falling into the paper feed port with a simpler configuration while ensuring usability for operating each part of the device. [Means for solving the problem]

[0010] In order to achieve the above object, the present disclosure provides a feeding device including a housing and a feeding mechanism formed in the housing, the recording medium supplying device includes a supply port for supplying a recording medium into the housing; a first cover rotatable about a first rotation axis between a first position for closing the supply port and a second position for opening the supply port; a rotating unit provided at a position capable of contacting the first cover and rotatable about a second rotation axis between a closed position for closing the housing and an open position for opening the housing; and a second cover provided on the rotating unit and rotatable about a third rotation axis in association with movement of the rotating unit and capable of contacting the first cover, When the rotating unit is moved to the open position while in the first position, the first cover rotates in response to the rotation of the rotating unit while coming into contact with the second cover via a first abutment point, and in a triangle formed by the first rotation axis, the third rotation axis, and the first abutment point, the interior angle of the first abutment point is 90° or more, and when the first cover is in contact with the second cover, the center of gravity of the first cover is located on the side of the third rotation axis with respect to a perpendicular line passing through the first rotation axis. Effect of the Invention

[0011] According to the technique of the present disclosure, it is possible to provide a feeding device that can prevent foreign objects from falling into the paper feed port with a simpler configuration while ensuring usability for operating each part of the device. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view showing an image forming apparatus according to an embodiment; [Diagram 2] FIG. 1 illustrates an image forming apparatus and a feeding device according to an embodiment; [Diagram 3] FIG. 1 is a diagram showing an internal configuration of an image forming apparatus according to an embodiment; [Figure 4] FIG. 2 is a diagram showing a reading unit of an image forming apparatus according to an embodiment; [Diagram 5] FIG. 1 is a top view of an image forming apparatus according to an embodiment; [Figure 6] FIG. 1 is a partial cross-sectional view of an image forming apparatus according to an embodiment; [Figure 7]FIG. 1 is a diagram illustrating a state in which an opening / closing cover of an image forming apparatus according to an embodiment is in an open position. [Figure 8] FIG. 1 is a diagram illustrating a state in which a tray of an image forming apparatus according to an embodiment is pulled out. [Figure 9] FIG. 2 is a diagram illustrating an ADF paper feed tray of an image forming apparatus according to an embodiment; [Figure 10] FIG. 1 illustrates a state in which an ADF of an image forming apparatus according to an embodiment is in an open position. [Figure 11] FIG. 1 is a diagram illustrating a state in which a reading unit of an image forming apparatus according to an embodiment is in an open position. [Figure 12] FIG. 2 is a diagram showing an ADF of an image forming apparatus according to an embodiment; [Figure 13] FIG. 1 is a diagram illustrating a state in which the opening / closing cover of an image forming apparatus according to an embodiment is in a [Figure 14] FIG. 13 is another view showing a state in which the tray of the image forming apparatus according to the embodiment is pulled out. [Figure 15] FIG. 11 is a diagram illustrating an example of an operation of a cover member of an image forming apparatus according to an embodiment; [Figure 16] FIG. 11 is another diagram illustrating an example of an operation of the cover member of the image forming apparatus according to the embodiment. [Figure 17] FIG. 2 is a diagram illustrating an opening / closing cover of an image forming apparatus according to an embodiment; [Figure 18] FIG. 2 is a diagram illustrating a relationship between an opening / closing cover and a cover member of an image forming apparatus according to an embodiment [Figure 19] FIG. 13 is a diagram illustrating an example of an operation of an opening and closing cover of an image forming apparatus according to an embodiment; [Figure 20] FIG. 11 is a diagram illustrating an example of an operation of a cover member of an image forming apparatus according to an embodiment; [Figure 21] FIG. 2 is another diagram showing the ADF of the image forming apparatus according to the embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Preferred embodiments of the technology of the present disclosure will be described in detail below with reference to the accompanying drawings. In each drawing, the same reference numerals are used for the same components, and duplicated descriptions will be omitted. Each embodiment will be described in more detail below. The numerical values ​​shown in each of the following examples are merely examples, and the technology of the present disclosure is not limited to these. The technology of the present disclosure is not limited to each embodiment, and includes combinations of these embodiments and applications to other technical fields.

[0014] (First embodiment) An image forming apparatus according to a first embodiment of the technology of the present disclosure will be described below. This is a perspective view showing an inkjet recording apparatus 10 as an example of an image forming apparatus according to the present embodiment. In each of the drawings described below, a coordinate system consisting of an X-axis, a Y-axis, and a Z-axis that are orthogonal to each other is set. In the drawings, it is assumed that the inkjet recording apparatus 10 is placed on a surface parallel to the XY plane. The negative direction of the Z-axis is the direction of gravity.

[0015] Fig. 2A is a perspective view of the inkjet recording apparatus 10, and Fig. 2B is a side view thereof. Fig. 2B also shows a feeding device 100 for a sheet material as a recording medium provided in the inkjet recording apparatus 10. In this embodiment, the inkjet recording apparatus 10 is an image forming apparatus provided with the feeding device 100 that feeds the sheet material to recording means 33, and the recording means 33 that performs recording by forming an image on the sheet material.

[0016] The inkjet recording device 10 has a housing 11 having a substantially rectangular parallelepiped shape provided in the feeding device 100. As shown in Fig. 2A, the housing 11 has a front surface on the negative side of the Y axis of a surface parallel to the XZ plane, and a back surface on the positive side of the Y axis. The housing 11 also has a side surface parallel to the YZ plane, a bottom surface on the negative side of the Z axis of a surface parallel to the XY plane, and a top surface on the positive side of the Z axis. As shown in Fig. 2B, the feeding device 100 includes, as an example, the housing 11, a reading unit 39, an ADF (Automatic Document Feeder) 40, an opening / closing cover 20, and a paper feed port 301. The details of each component of the feeding device 100 will be described below with reference to other drawings. It is also assumed that the feeding device 100 includes components other than the recording means 33, recording head, and ink cartridge 36 of the inkjet recording device 10 described below. However, the feeding device 100 does not need to include all the components of the inkjet recording device 10 described below, and the components of the feeding device 100 may be selected as appropriate.

[0017] Inkjet recording apparatus 10 includes paper feed means 30 and conveyance means 31 for supplying a sheet material as a recording medium to recording means 33, which will be described later and is housed in a housing. A paper feed opening 301 (supply opening) for feeding the sheet material into the inside of housing 11 is provided on the top surface of inkjet recording apparatus 10 for paper feed means 30. The sheet material is conveyed in the negative direction of the Y axis from paper feed opening 301 by separation means (not shown), and is fed to conveyance means 31 by the feeding means and conveyance path. The fed sheet material is conveyed in the negative direction of the Y axis through recording means 33 by conveyance means 31 and paper discharge means 32, which is driven synchronously with conveyance means 31.

[0018] The recording means 33 between the conveying means 31 and the paper discharge means 32 is provided with a carriage 34 that moves back and forth along the sheet material. The carriage 34 is equipped with a recording head (not shown). The recording head discharges ink from an ink cartridge 36 that contains ink for printing onto the sheet material based on recording information acquired by the inkjet recording device 10 to record an image. In the inkjet recording device 10, a platen 35 is disposed at a position facing the recording means 33 in the direction of gravity to guide and support the sheet material during image recording. Then, the sheet material on which image recording has been completed is discharged by the paper discharge means 32 onto a paper discharge tray 37 that is provided in a movable manner outside the device main body.

[0019] The inkjet recording apparatus 10 is provided with a paper feed cassette 38 for stacking sheet materials in addition to the paper feed means 30. Of the sheet materials stacked in the paper feed cassette 38, the uppermost sheet material in the paper feed cassette 38 is separated and transported in the positive direction of the Y axis by a separation means (not shown), and is fed to the transport means 31 by the paper feed means 30 and a transport path (not shown). The user can select whether to use the paper feed means 30 or the paper feed cassette 38 to feed the sheet material by operating an input unit (not shown) of the inkjet recording apparatus 10.

[0020] FIG. 3A is a top view of the inkjet recording apparatus 10, and FIG. 3B is a perspective view of the inkjet recording apparatus 10. Note that FIGS. 3A and 3B show a state in which the reading means 39 and the ADF 40 of the inkjet recording apparatus 10 have been removed. As shown in FIG. 3A, The inkjet recording device 10 has a feed roller 51, an opening / closing cover 20, an upper recess 52, and an opening 55 for the feed roller to access the feed roller 56. Furthermore, as shown in Fig. 3B, the inkjet recording device 10 has a stacking tray 302 that is provided so as to be able to be accommodated in the feed port 301, and a side guide 53 for the sheet material stacked on the stacking tray 302.

[0021] 4A is a bottom view of the reading means 39 of the inkjet recording apparatus 10, and FIG. 4B is a perspective view showing the bottom of the reading means 39 of the inkjet recording apparatus 10. As shown in FIGS. 4A and 4B, the reading means 39 has a lower convex portion 54 protruding from the bottom surface. The lower convex portion 54 ensures a space for accommodating a drive motor 58 for driving a sensor (not shown) of the ADF 40, which will be described later, within the reading means 39. The lower convex portion 54 is provided at a position corresponding to the upper concave portion 52 shown in FIGS. 3A and 3B.

[0022] Moreover, Fig. 5 is a top view of the inkjet recording apparatus 10. Moreover, Fig. 6A shows a cross section of the inkjet recording apparatus 10 taken along line aa in Fig. 5, and Fig. 6B shows a cross section of the inkjet recording apparatus 10 taken along line bb in Fig. 5.

[0023] As shown in FIG. 6A, in the inkjet recording device 10, a side guide 53 for adjusting the lateral (width) position of the sheet material in the stack tray transport direction is provided in the paper feed port 301. In addition, the inkjet recording device 10 is provided with a paper feed roller 56 for transporting the sheet material to the recording means 33 and a transport path 57 for the sheet material. Furthermore, above the paper feed roller 56 (on the positive side of the Z axis), an opening 55 for the paper feed roller is provided so that the user can access the paper feed roller 56 when cleaning the paper feed roller 56. In addition, as shown in FIG. 6B, in the reading means 39, a drive motor 58 is disposed in the lower convex portion 54. In this embodiment, the sheet material placed on the stack tray 302 is sent from the paper feed port 301 to the recording means 33 through the transport path 57 by the paper feed roller 56.

[0024] Next, the opening / closing cover 20 will be described. Fig. 7A is a perspective view of the inkjet recording device 10 in a state where the opening / closing cover 20 has been moved to an open position where the paper feed port 301 is opened, and Fig. 7B is a side view thereof. Fig. 8A is a perspective view of the inkjet recording device 10 in a state where the stacking tray 302 housed in the paper feed port 301 has been pulled out from the paper feed port 301, and Fig. 8B is a side view thereof. The state where the opening / closing cover 20 has been moved to a closed position where the paper feed port 301 is closed is shown in Figs. 2, 5, and 6. The opening / closing cover 20 is a first cover provided to be rotatable around a rotation shaft 201, which is a first rotation shaft, between a first position (closed position) where the paper feed port 301 is closed and a second position (closed position) where the paper feed port 301 is opened.

[0025] In this embodiment, a loading tray 302 for loading sheet materials is accommodated in the paper feed port 301, and an opening / closing cover 20 is provided at an end of the loading tray 302. The opening / closing cover 20 rotates about a rotation shaft 201 provided on the loading tray 302. Note that, in this embodiment, it is assumed that the opening / closing cover 20 is provided on the loading tray 302, but the opening / closing cover 20 may be provided on the housing 11 instead of the loading tray 302.

[0026] When the sheet material is transported using the paper feed cassette 38 and the paper feed means 30 is not used, the inkjet recording device 10 can be used with the paper feed port 301 closed by the opening / closing cover 20 to prevent foreign objects from entering the paper feed port 301. When the sheet material is transported to the recording means 33 using the paper feed means 30, the user moves the opening / closing cover 20 to an open position that opens the paper feed port 301, as shown in Figs. 7A and 7B, and sets the sheet material in the paper feed port 301. Furthermore, the user can pull out the stacking tray 302 housed in the paper feed port 301 from the paper feed port 301, place the sheet material on the stacking tray 302, and transport the sheet material, as shown in Figs. 8A and 8B.

[0027] FIG. 9 is a perspective view of the inkjet recording device 10 in a state where the ADF paper feed tray 401 is open. FIG. 10A is a perspective view of the inkjet recording device 10 in a state where the ADF 40 is moved to the open position, and FIG. 10B is a side view thereof. FIG. 11A is a perspective view of the inkjet recording device 10 in a state where the reading means 9 is moved to the open position, and FIG. 11B is a side view thereof. Note that the state where the ADF 40 is moved to the closed position and the state where the reading means 39 is moved to the closed position are shown in FIG. 2 and FIG. 5 to FIG. The ADF 40 is provided at a position where it can come into contact with the opening / closing cover 20. The ADF 40 is a rotating unit provided to be rotatable around a rotating shaft 404, which is a second rotating shaft, between a closed position where the housing 11 is closed and an open position where the housing 11 is opened.

[0028] In this embodiment, a reading unit 39 for reading an original and an ADF 40 are provided on the upper surface side (positive side of the Z axis) of a housing 11 of the inkjet recording apparatus 10. The ADF 40 is provided with an ADF paper feed tray 401 that is rotatable relative to the ADF 40, and an original is set on the ADF 40 by opening the ADF paper feed tray 401. The original set on the ADF 40 is automatically transported by the ADF 40, and image data of the original is obtained by the reading unit 39. The automatically transported original is discharged onto an ADF paper discharge tray 402 provided on the upper surface of the ADF 40.

[0029] Moreover, a document table 391 for reading a document is provided above the reading means 39. The ADF 40 rotates around a rotation shaft 404 provided on the reading means 39. The user moves the ADF 40 to the open position, places a document on the document table 391, moves the ADF 40 to the closed position, and executes reading of the document by the reading means 39. The user can operate the inkjet recording device 10 to select whether to use the ADF 40 or the document table 391 for reading the document. The reading means 39 is also provided on the housing 11 so as to be rotatable around a rotation shaft (not shown) that extends in the same direction as the rotation shaft 404 of the ADF 40. The user rotates the reading means 39 to move it to the open position for maintenance of the inkjet recording device 10, such as when replacing the ink cartridge 36 in the inkjet recording device 10 or when a paper jam occurs in the paper feed means 30 or the transport means 31.

[0030] Next, the operation of the ADF 40 and the opening / closing cover 20 of the inkjet recording apparatus 10 will be described. Fig. 12 is a perspective view of the ADF 40 as viewed from the rear side (positive side of the Y axis) of the inkjet recording apparatus 10. Fig. 13A is a diagram showing a cross section taken along line aa in Fig. 5 in a state in which the stacking tray 302 is housed in the paper feed port 301 and the ADF 40, the cover member 41, and the opening / closing cover 20 are all in the closed position. Fig. 13B is a diagram showing a cross section taken along line cc in Fig. 5 in the same state as Fig. 13A.

[0031] 14A is a diagram showing a part of a cross section taken along line aa in FIG. 5 in a state where the ADF 40 and the cover member 41 are in the closed position and the stacking tray 302 is in the open position. FIG. 14B is a top view of the inkjet recording apparatus 10 in the same state as FIG. 14A. FIG. 15A is a diagram showing a cross section taken along line aa in FIG. 5 in a state where the stacking tray 302 is pulled out from the paper feed port 301 and the ADF 40 and the cover member 41 are in the open position. FIG. 15B is a diagram showing a cross section taken along line bb in FIG. 5 in the same state as FIG. 15A. FIG. 16A is a diagram showing a cross section taken along line aa in FIG. 5 in a state where the stacking tray 302 is pulled out from the paper feed port 301, the ADF 40 is in the closed position, and the cover member 41 is in the open position. FIG. 16B is a top view of the inkjet recording apparatus 10 in the same state as FIG. 16A. The cover member 41 is provided so as to be retractable into the ADF 40. Cover member 41 is a second cover that is rotatable about rotation axis 411, which is a third rotation axis, in association with the movement of ADF 40 and is capable of coming into contact with opening / closing cover 20.

[0032] When the sheet feeding means 30 is not used to feed the sheet material to the recording means 33, FIG. 13A and 13B, in order to prevent foreign matter from entering paper feed port 301, opening / closing cover 20 is moved to a closed position to close paper feed port 301. When sheet material is fed from paper feed port 301 using paper feed means 30, stacking tray 302 is pulled out from paper feed port 301 and sheet material is placed on stacking tray 302, as shown in FIGS. 14A and 14B. When ADF 40 is moved to the open position with stacking tray 302 pulled out from paper feed port 301, cover member 41 rotates by its own weight and moves to an open position to cover a part of paper feed port 301, as shown in FIG. 15A.

[0033] Therefore, even if ADF 40 is moved to the open position with a foreign object such as a paper clip placed on ADF 40, cover member 41 can prevent the foreign object placed on ADF 40 from falling into paper feed opening 301. Also, if a foreign object is placed on ADF paper output tray 402, ADF paper output tray wall surface 403 prevents the foreign object from falling into paper feed opening 301 when ADF 40 is moved to the open position.

[0034] When the ADF 40 is moved from the open position shown in Figures 15A and 15B to the closed position, the cover member 41 remains in the open position as shown in Figures 16A and 16B. However, the cover member 41 does not come into contact with the sheets placed on the stack tray 302. Also, the user can easily access the paper feed opening 301 by moving the cover member 41 to the closed position (the position shown in Figures 14A and 14B).

[0035] 12, when the ADF 40 is in the closed position, the cover member 41 is stored integrally in the ADF 40 such that an end 41a of the cover member 41 opposite the rotation shaft 411 is located below the upper surface of the ADF 40. Therefore, when the cover member 41 is in the closed position, the cover member 41 is stored in the ADF 40, and there is no concern that the cover member 41 will mar the appearance of the inkjet recording apparatus 10.

[0036] Fig. 17 is a perspective view showing the back surface (lower surface) of opening-closing cover 20, and Fig. 18 is a diagram showing a cross section taken along line aa in Fig. 5 in a state in which ADF 40 has been moved to the open position from a state in which ADF 40 and opening-closing cover 20 are both in the closed position. Fig. 18 is a cross section of inkjet recording apparatus 10 taken along a plane parallel to the direction of gravity, including pivot shaft 201 of opening-closing cover 20, first abutment point 204, and pivot shaft 411 of cover member 41.

[0037] When moving the ADF 40 from the state where both the ADF 40 and the opening / closing cover 20 are in the closed position to the open position, the ADF 40 rotates about the rotation axis 404. Also, the opening / closing cover 20 is guided by a guide portion 405 (FIGS. 13A and 13B) provided on the ADF 40 and rotates about the rotation axis 201. Further, the cover member 41 rotates about the rotation axis 411 due to its own weight. In a state where the ADF 40 is in the open position, the cover member 41 abuts on the opening / closing cover 20 via a first contact point 204 with a support portion 202 of the opening / closing cover 20. Therefore, the opening / closing cover 20 rotates in accordance with the rotation of the ADF 40 while being in contact with the cover member 41 via the first contact point 204.

[0038] In the cross-section of the inkjet recording apparatus 10 shown in FIG. 18, in a triangle T1 formed by the rotation axis 201 of the opening / closing cover 20, the rotation axis 411 of the cover member 41, and the first contact point 204, let the interior angle of the first contact point be θ. At this time, the angle θ is set to be approximately 90° or more. Also, as shown in FIG. 18, in a state where the opening / closing cover 20 is in contact with the cover member 41, the center of gravity position 205 of the opening / closing cover 20 is on the side of the rotation axis 411 with respect to a perpendicular line L1 passing through the rotation axis 201 of the opening / closing cover 20.

[0039] And in the cross-section of FIG. 18, let the moment acting on the opening / closing cover 20 from the cover member 41 in the direction in which the opening / closing cover 20 moves to the open position be a. Also, let the moment acting on the opening / closing cover 20 due to its own weight in the direction in which the opening / closing cover 20 moves to the closed position be b. At this time, the relationship a < b holds. 0 of the opening / closing cover 20 due to its own weight in the direction in which the opening / closing cover 20 moves to the closed position be b. At this time, the relationship a < b holds.

[0040] As a result, the moment generated by the gravity of the opening-closing cover 20 continues to act in the direction in which the opening-closing cover 20 moves to the closed position. Furthermore, by setting the interior angle θ to 90° or more, the moment generated from the cover member 41 to the opening-closing cover 20 also continues to act in the direction in which the opening-closing cover 20 moves to the closed position. Therefore, even if the ADF 40 is moved to the open position when both the ADF 40 and the opening-closing cover 20 are in the closed position, the opening-closing cover 20 is prevented from moving to the open position. Furthermore, even if the ADF 40 is moved to the closed position from the state shown in FIG. 18, the opening-closing cover 20 will be in the state shown in FIGS. 13A and 13B.

[0041] Fig. 19A is a diagram showing a part of the cross section taken along line aa in Fig. 5 when ADF 40 is in the closed position and cover member 41 and opening / closing cover 20 are both in the open position. Fig. 19B is a diagram showing a part of the cross section taken along line aa in Fig. 5 when opening / closing cover 20 is moved to the closed position from the state shown in Fig. 19A. Fig. 19C is a cross section corresponding to Fig. 19B when a thick document such as a book is set on document table 391.

[0042] As shown in FIG. 17, the opening / closing cover 20 includes a rotating shaft 201, a support portion 202, and a guide portion 203. The guide portion 203 is provided so as to be able to come into contact with the cover member 41. As shown in FIG. 19B, when the ADF 40 is in the closed position and the cover member 41 and the opening / closing cover 20 are both in the open position, when the opening / closing cover 20 is moved to the closed position, the guide portion 203 of the opening / closing cover 20 comes into contact with the cover member 41 via the second contact point 206. At this time, the opening / closing cover 20 moves to the closed position by its own weight, and the cover member 41, in contact with the guide portion 203, is pushed by the guide portion 203 and moves toward the ADF 40 side (the rotating unit side). As a result, the opening / closing cover 20 and the cover member 41 move to the closed position, resulting in the state shown in FIG. 13A and FIG. 13B.

[0043] 19C, when a thick document such as a book is placed on document table 391 and ADF 40 is moved to the closed position, ADF 40 is positioned on the positive side of the Z axis from the position shown in FIG. 19B. In this state, as in the case of FIG. 19B, when opening / closing cover 20 is moved to the closed position, guide portion 203 provided on opening / closing cover 20 abuts against cover member 41 via second abutment point 206. At this time, opening / closing cover 20 moves to the closed position due to its own weight, and cover member 41 is pushed by guide portion 203 and moves to the closed position. As a result, opening / closing cover 20 and cover member 41 both move to the closed position, resulting in the state shown in FIG. 13A and FIG. 13B.

[0044] Next, an example of the operation of the ADF 40 and the opening / closing cover 20 when they move from a state in which they are both in the open position to a state in which they are both in the closed position will be described. FIG. 20A is a diagram showing a part of a cross section taken along line aa in FIG. 5 in a state in which the ADF 40, the cover member 41, and the opening / closing cover 20 are all in the open position. FIG. 20B is a diagram showing a part of a cross section taken along line a-a in FIG. 5 in a state in which the opening / closing cover 20 has been moved to the closed position from the state shown in FIG. 20A. FIG. 20C is a diagram showing a part of a cross section taken along line aa in FIG. 5 in a state in which the ADF 40 has been moved to the closed position from the state shown in FIG. 20B. FIG. 20D is a diagram showing a part of a cross section taken along line aa in FIG. 5 in a state in which the ADF 40 has further been moved to the closed position from the state shown in FIG. 20C.

[0045] As shown in Fig. 20A, when the ADF 40, cover member 41, and opening / closing cover 20 are all in the open position, if the opening / closing cover 20 is moved to the closed position, the opening / closing cover 20 comes into contact with the ADF 40 and is supported by the ADF 40 (Fig. 20B). When the ADF 40 is moved to the closed position from the state shown in Fig. 20B, the cover member 41 moves toward the guide portion 2 of the opening / closing cover 20. 20C, the ADF 40 comes into contact with the guide portion 203 via the third contact point 207 (FIG. 20C). When the ADF 40 is further moved to the closed position from the state shown in FIG. 20C, the opening / closing cover 20 is moved to the open position via the guide portion 203 while the cover member 41 remains in contact with the guide portion 203 (FIG. 20D). Then, after the opening / closing cover 20 has been moved to the open position, when the movement of the ADF 40 to the closed position is completed, the cover member 41 moves to the closed position and the opening / closing cover 20 moves to the closed position by its own weight, resulting in the state shown in FIGS. 13A and 13B.

[0046] Therefore, according to the inkjet recording apparatus 10 of this embodiment, it is possible to prevent foreign matter on the ADF 40 from entering the paper feed port 301 when the ADF 40 is operated. Also, it is possible to arrange and configure the opening / closing cover 20 and the cover member 41 so that they do not affect operations such as setting a sheet material in the paper feed port 301 by the user when the ADF 40 is opened or closed.

[0047] Second embodiment Next, an inkjet recording apparatus according to a second embodiment will be described. In the following description, the same components as those in the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

[0048] FIG. 21 is a perspective view of the ADF 240 in this embodiment. FIG. 21 shows a state in which the cover member 241 provided on the ADF 240 is stored in the ADF 240. As shown in FIG. 21, when the ADF 240 is in the closed position, the cover member 241 is stored in the ADF 240 such that the end 241a on the opposite side to the pivot shaft 411 becomes part of the upper surface of the ADF 240. The cover member 240 can increase the area covering the paper feed port 301 compared to the cover member 41 of the first embodiment. Therefore, in this embodiment, even if the ADF 240 is moved to the open position with a foreign object such as a paper clip placed on the ADF 240, the possibility that the foreign object will fall into the paper feed port 301 can be further reduced.

[0049] The disclosure of this embodiment includes the following configuration. (Configuration 1) A housing and a supply port formed in the housing for feeding a recording medium into the housing; a first cover that is rotatable about a first rotation axis between a first position that closes the supply port and a second position that opens the supply port; a rotation unit provided at a position capable of coming into contact with the first cover and rotatable about a second rotation shaft between a closed position for closing the housing and an open position for opening the housing; a second cover provided on the rotating unit, rotatable about a third rotation axis in accordance with the movement of the rotating unit, and capable of coming into contact with the first cover; Equipped with when the rotating unit is moved to the open position in a state in which the first cover is in the first position, the first cover rotates in response to the rotation of the rotating unit while coming into contact with the second cover via a first abutment point; In a triangle formed by the first rotation axis, the third rotation axis, and the first abutment point, an interior angle of the first abutment point is 90° or more, When the first cover is in contact with the second cover, the center of gravity of the first cover is on the third rotation axis side with respect to a perpendicular line passing through the first rotation axis. A feeding device characterized by: (Configuration 2) the first cover has a guide portion provided so as to be able to come into contact with the second cover, When the rotating unit is moved to the closed position and the first cover is moved to the second position, when the first cover is moved to the first position, the second cover rotates toward the rotating unit while contacting the guide portion. 2. The feeding device according to configuration 1, (Configuration 3) The first cover and the second cover are in contact with each other through the first contact point. In this state, the first cover is moved to the second position by the second cover. Let the moment acting be a, and let the moment acting in the direction in which the first cover moves to the first position due to its own weight be b. Then, a configuration 1 is characterized in that the relationship a < b holds. or the feeding device according to 2. (Configuration 4) In a state where the first cover is in the second position and the rotating unit is in the open position wherein, when the first cover is moved toward the first position, the first cover is supported by the rotating unit, in a state where the first cover is supported by the rotating unit, while the rotating unit is moved to the closed position, the second cover abuts against the guide portion of the first cover, with the second cover abutting against the guide portion, when the rotating unit is moved to the closed position and is moved, while the state where the second cover abuts against the guide portion is maintained, the first cover is moved to the first position after being moved to the second position side by the second cover. The feeding device according to configuration 2, characterized in that. (Configuration 5) In a state where the first cover is in the second position and the rotating unit is in the closed position, when the rotating unit is moved to the open position, the second cover moves to a position covering at least a part of the supply port. The feeding device according to any one of configurations 1 to 4, characterized in that. (Configuration 6) In a state where the rotating unit is in the closed position, the second cover is housed in the rotating unit such that an end portion of the second cover on the side opposite to the third rotation axis is located below the upper surface of the rotating unit. The feeding device according to any one of configurations 1 to 5, characterized in that. the feeding device. (Configuration 7) When the rotating unit is in the closed position, the second cover is disposed in a front position such that an end portion of the second cover opposite to the third rotating shaft becomes a part of an upper surface of the rotating unit. The feeding device according to any one of configurations 1 to 5, characterized in that the feeding device is housed in the rotating unit. . (Configuration 8) An image forming apparatus comprising the feeding device according to any one of configurations 1 to 7. [Explanation of symbols]

[0050] 11 housing, 20 opening / closing cover, 40 ADF, 41 cover member, 100 feeding device, 301 paper feed port

Claims

1. A housing and a supply port formed in the housing for feeding a recording medium into the housing; a first cover that is rotatable about a first rotation axis between a first position that closes the supply port and a second position that opens the supply port; a rotation unit provided at a position capable of coming into contact with the first cover and rotatable about a second rotation shaft between a closed position for closing the housing and an open position for opening the housing; a second cover provided on the rotating unit, rotatable about a third rotation axis in response to movement of the rotating unit, and capable of coming into contact with the first cover; Equipped with when the rotating unit is moved to the open position while the first cover is in the first position, the first cover rotates in response to the rotation of the rotating unit while coming into contact with the second cover via a first abutment point; In a triangle formed by the first rotation axis, the third rotation axis, and the first abutment point, an interior angle of the first abutment point is 90° or more, When the first cover is in contact with the second cover, the center of gravity of the first cover is on the third rotation axis side with respect to a perpendicular line passing through the first rotation axis. A feeding device characterized by:

2. the first cover has a guide portion provided so as to be able to come into contact with the second cover, When the first cover is moved to the first position in a state in which the rotating unit is moved to the closed position and the first cover is moved to the second position, the second cover rotates toward the rotating unit while abutting against the guide portion.

2. The feeding device according to claim 1 .

3. The first cover and the second cover are in contact with each other through the first contact point. In this state, the first cover is moved to the second position by the second cover.

2. The feeding device according to claim 1, wherein a moment acting thereon is a moment acting in a direction in which the first cover moves to the first position due to its own weight is b, where a<b holds true.

4. When the first cover is in the second position and the rotating unit is in the open position, Leave, When the first cover is moved toward the first position, the first cover is supported by the rotating unit; In a state in which the first cover is supported by the rotating unit, While the knit is moved to the closed position, the second cover abuts against the guide portion of the first cover, When the second cover is in contact with the guide portion, the rotating unit is in the closed position. When the second cover is moved, the second cover is maintained in contact with the guide portion, and the The first cover is moved to the second position by the second cover and then moved to the first position.

3. The feeding device according to claim 2.

5. In a state in which the first cover is in the second position and the rotating unit is in the closed position, When the rotating unit is moved to the open position, the second cover closes the supply port. Move to a position that covers at least part of the 2. The feeding device according to claim 1 .

6. The second cover is closed so that an end portion of the second cover opposite to the third rotation shaft is positioned below an upper surface of the rotation unit when the rotation unit is in the closed position.

2. The feeding device according to claim 1, wherein the bar is housed in the rotating unit.

7. When the rotating unit is in the closed position, the second cover is disposed in a front position such that an end portion of the second cover opposite to the third rotating shaft becomes a part of an upper surface of the rotating unit.

2. The feeding device according to claim 1, wherein the feeding device is housed in the rotating unit.

8. An image forming apparatus comprising the feeding device according to any one of claims 1 to 7.

Images