JP2017013915A - Sheet feeding device and image forming apparatus including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming apparatus including a sheet feeding device that can simplify a sheet jam processing work while an increase in size of the device is suppressed.SOLUTION: The sheet feeding device 200 includes a sheet feeding tray 201 that accommodates a sheet P. The sheet feeding device includes: a first moving mechanism such as a first guide rail 201c that enables the sheet feeding tray to move in a sheet feeding direction; and a second moving mechanism such as a second guide rail 201g that enables the sheet feeding tray to move in a direction intersecting with the sheet feeding direction. Therefore, a straddling jammed sheet can be pulled out of the image forming apparatus without being torn while suppressing the increase in size of the device, whereby the sheet jam processing work can be simplified.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sheet feeding device and an image forming apparatus including the sheet feeding device.

  2. Description of the Related Art Conventionally, an image forming apparatus has been provided with a paper feed tray that can be moved between a position for taking in and out paper and a position for feeding paper to the image forming apparatus, one by one. A paper feeding device that feeds paper is known.

  Japanese Patent Application Laid-Open No. 2004-228561 describes a paper feeding device including a supply tray as a paper feeding tray that is movable in a paper feeding direction along a guide rail as a moving mechanism. In this paper feeding device, when removing jammed paper (hereinafter referred to as tearing jammed paper) remaining on the paper transport path in a state straddling between the supply tray and the image forming apparatus, the paper is removed from above. The sheet is pressed by a sheet pressing member as a holding unit and is held in the supply tray. In this state, the operator moves the supply tray to the upstream side in the paper feeding direction, and tears the jammed paper out of the paper transport path on the image forming apparatus side in conjunction with the movement of the paper feeding tray.

  Japanese Patent Application Laid-Open No. 2004-228561 describes a paper feeding device configured such that a cassette as a paper feeding tray is detachable in a direction perpendicular to the paper feeding direction. In this paper feeding device, the cassette is guided and pulled out in a direction orthogonal to the paper feeding direction by a guide mechanism as a moving mechanism.

  In general, an image forming apparatus requires a use space including an installation space for installing the image forming apparatus main body and a work space that allows an operator to perform loading and unloading work outside the image forming apparatus main body. . Further, the image forming apparatus main body requires at least an internal space in which a paper feed tray and a paper transport path for transporting paper from the paper feed tray in the paper feeding direction are required. Is often long in the paper feeding direction.

  According to the image forming apparatus provided with the paper feeding device of Patent Document 1, the work space is adjacent to the installation space in the longitudinal direction, so the maximum length of the use space is the longitudinal direction in the installation space of the image forming apparatus main body. And the length of the work space. As a result, there is a problem that the work space becomes larger than the image forming apparatus adjacent to the installation space in the short direction.

  According to the image forming apparatus provided with the paper feeding device disclosed in Patent Document 2, the work space is adjacent to the installation space in the short direction, so that the problem of increasing the size of the apparatus can be solved. However, when the operator removes the tearing jammed paper and the operator moves the cassette as it is in a direction perpendicular to the paper feeding direction by the guide mechanism, the tearing jammed paper interferes with the image forming apparatus main body and is torn. If the torn paper remains on the image forming apparatus side, a processing operation to remove the torn paper becomes necessary, or in some cases, the torn paper may cause another problem, and the paper jam processing. There is a problem that the work becomes complicated. This problem is not limited to the case where the paper feed tray is moved in a direction orthogonal to the paper feed direction, but can be caused similarly even when the paper feed tray is moved in a direction crossing the paper feed direction. .

  In order to solve the above-described problem, the invention according to claim 1 is a sheet feeding device including a sheet feeding tray for storing sheets, and a first moving mechanism that allows the sheet feeding tray to move in a sheet feeding direction; And a second moving mechanism that allows the sheet feeding tray to move in a direction that intersects the sheet feeding direction.

  According to the present invention, it is possible to obtain a specific effect that the paper jam handling operation can be simplified while suppressing the enlargement of the apparatus.

1 is a schematic configuration diagram of a copier according to an embodiment. FIG. 3 is a schematic cross-sectional view illustrating a schematic configuration of a sheet feeding device according to an embodiment. FIG. 3 is a schematic cross-sectional view illustrating a state where a sheet is jammed on a sheet conveyance path in a state where the sheet straddles between a sheet feeding tray and an apparatus main body. FIG. 4A is a schematic cross-sectional view for explaining an operation of removing crying jammed paper in the paper feeding device of the embodiment, and FIG. FIG. 4A is a schematic cross-sectional view illustrating a process of removing crying jammed paper in the paper feeding device of the embodiment, and FIG. The perspective view explaining the structure of a paper feed tray. FIG. 6 is a partial perspective view illustrating a partial structure of a paper feed tray. FIG. 3 is a schematic cross-sectional view illustrating a process for removing crying jammed paper in the paper feeding device according to the embodiment. FIG. 10 is a schematic cross-sectional view illustrating a crying jam paper removal process in a paper feeding device according to a first modification. FIG. 10 is a schematic cross-sectional view illustrating a process for removing crying jammed paper in a paper feeder of a second modification. 10 is a flowchart for explaining a crying jam paper removal processing operation in a paper feeding device according to a second modification. FIG. 10 is a schematic cross-sectional view illustrating a process for removing crying jammed paper in a paper feeder of a third modification. 10 is a flowchart for explaining a crying jam paper removal processing operation in a sheet feeding device according to a third modification. 10 is a flowchart for explaining a crying jam paper removal processing operation in a paper feeding device according to Modification 4;

  Hereinafter, as an image forming apparatus to which the present invention is applied, an embodiment (hereinafter simply referred to as “embodiment”) of a tandem type color laser copying machine (hereinafter simply referred to as “copying machine”) in which a plurality of photoconductors are arranged in parallel. ").

FIG. 1 is a schematic configuration diagram of a copying machine according to an embodiment.
The copier includes a printer unit 100, a paper feeding device 200 on which the printer unit 100 is placed, a scanner 300 fixed on the printer unit 100, and the like. An automatic document feeder 400 fixed on the scanner 300 is also provided.

  The printer unit 100 includes an image forming unit including four sets of process cartridges 18Y, 18M, 18C, and 18K for forming images of each color of yellow (Y), magenta (M), cyan (C), and black (K). 20 is provided. Y, M, C, and K attached to the numbers of the respective symbols indicate members for yellow, cyan, magenta, and black (the same applies hereinafter).

  In addition to the process cartridges 18Y, 18M, 18C, and 18K, an optical writing unit 21, an intermediate transfer unit 17, a secondary transfer device 22, a resist roller pair 49, a belt fixing type fixing device 25, and the like are disposed. .

  The optical writing unit 21 includes a light source, a polygon mirror, an f-θ lens, a reflection mirror, and the like, and irradiates the surface of a photoconductor described later with laser light based on image data.

Here, since the configuration of each process cartridge 18 is almost the same, in the following description, the configuration and operation of the process cartridge 18 will be described with the subscripts (Y, C, M, K) for color coding omitted.
The process cartridge 18 is mounted in the copying machine main body by being inserted into the mounting space in the copying machine main body from the front side to the back side of the apparatus. The process cartridge 18 includes a drum-shaped photoconductor 1, a drum cleaning unit, a charging unit, and a developing device 4 arranged around the photoconductor 1. A heat radiating portion is formed on the side surface of the developing casing of the developing device 4.

  The developing device 4 stores a two-component developer developer composed of a toner and a carrier, and a developing roller as a developer carrying member that supplies the toner to the latent image on the surface of the photoreceptor 1 while developing the surface and develops the toner. And a developing casing that forms a developer reservoir. The developing roller includes a magnet roller made up of a plurality of magnets fixed inside, and a cylindrical developing sleeve made of a nonmagnetic material that encloses the magnet roller and rotates around the magnet roller. As the developing sleeve rotates around the magnet roller forming the plurality of magnetic poles, the developer moves on the developing roller with the rotation.

  A developing electric field is formed between the developing sleeve and the photosensitive member 1 in the developing region by applying a developing bias to the developing sleeve of the developing roller from a developing power source as a developing bias applying means. By this development electric field, in the development area, the toner in the developer on the surface of the development sleeve is supplied to the latent image on the surface of the photoreceptor 1 and the latent image on the photoreceptor 1 is developed.

  The surface of the photoreceptor 1 is uniformly charged by a charging unit as charging means. The surface of the photoreceptor 1 subjected to the charging process is irradiated with laser light modulated and deflected by the optical writing unit 21. Then, the potential of the irradiation part (exposure part) is attenuated. By this attenuation, an electrostatic latent image is formed on the surface of the photoreceptor 1. The formed electrostatic latent image is developed by the developing device 4 as developing means to become a toner image.

  The toner image formed on the photoreceptor 1 is primarily transferred to an intermediate transfer belt 110 described later. The surface of the photosensitive member 1 after the primary transfer is cleaned of residual toner by a cleaning blade. The cleaned photoreceptor 1 is neutralized by a neutralizing member. Then, it is uniformly charged by the charging unit and returns to the initial state.

  The series of processes as described above are the same for the process cartridges 18Y, 18M, 18C, and 18K.

Next, the intermediate transfer unit will be described with reference to FIG.
The intermediate transfer unit 17 includes an intermediate transfer belt 110, a belt cleaning device 90, and the like. Further, it also has a transfer tension roller 14, a transfer driving roller 15, a secondary transfer backup roller 16, four primary transfer bias rollers 62Y, M, C, K, and the like.

  The intermediate transfer belt 110 is tensioned by a plurality of rollers including the transfer stretching roller 14. Then, the transfer driving roller 15 driven by the belt driving motor is endlessly moved clockwise in the drawing.

  The four primary transfer bias rollers 62Y, 62M, 62C, and 62K are disposed so as to be in contact with the inner peripheral surface side of the intermediate transfer belt 110, respectively, and receive a primary transfer bias from a power source. Further, the intermediate transfer belt 110 is pressed toward the photoreceptors 1Y, 1M, 1C, and 1K from the inner peripheral surface side to form primary transfer nips. In each primary transfer nip, a primary transfer electric field is formed between the photosensitive member and the primary transfer bias roller due to the influence of the primary transfer bias.

  The above-described Y toner image formed on the Y photoconductor 1Y is primarily transferred onto the intermediate transfer belt 110 due to the influence of the primary transfer electric field and nip pressure. On the Y toner image, the M, C, K toner images formed on the M, C, K photoconductors 1M, C, K are sequentially superposed and primarily transferred. By this primary transfer of superposition, a four-color superposed toner image (hereinafter referred to as a four-color toner image) that is a multiple toner image is formed on the intermediate transfer belt 110.

  The four-color toner image superimposed and transferred on the intermediate transfer belt 110 is secondarily transferred to a sheet as a recording medium at a secondary transfer nip described later. Transfer residual toner remaining on the surface of the intermediate transfer belt 110 after passing through the secondary transfer nip is cleaned by a belt cleaning device 90 that sandwiches the belt with the transfer driving roller 15 on the left side in FIG.

Next, the secondary transfer device 22 will be described.
Below the intermediate transfer unit 17 in FIG. 1, a secondary transfer device 22 is disposed in which a paper conveying belt 24 is stretched by two stretching rollers 23. The paper transport belt 24 is moved endlessly in the counterclockwise direction in FIG. 1 in accordance with the rotational drive of at least one of the stretching rollers 23.

  One of the two stretching rollers 23, which is arranged on the right side in FIG. 1, has the intermediate transfer belt 110 and the paper transport belt 24 between the secondary transfer backup roller 16 of the intermediate transfer unit 17. It is sandwiched. By this sandwiching, a secondary transfer nip is formed in which the intermediate transfer belt 110 of the intermediate transfer unit 17 and the paper transport belt 24 of the secondary transfer device 22 are in contact with each other.

  A secondary transfer bias having a polarity opposite to that of the toner is applied to the one stretching roller 23 by a power source. By applying this secondary transfer bias, the four-color toner image on the intermediate transfer belt 110 of the intermediate transfer unit 17 is electrostatically moved from the belt side toward the one stretching roller 23 side in the secondary transfer nip. A next transfer electric field is formed.

  The paper fed into the secondary transfer nip so as to synchronize with the four-color toner image on the intermediate transfer belt 110 by a later-described registration roller pair 49 has four-color toner affected by the secondary transfer electric field and nip pressure. The image is secondary transferred.

  Instead of the secondary transfer method in which the secondary transfer bias is applied to one of the stretching rollers 23 as described above, a charger that charges the paper in a non-contact manner may be provided.

  In the paper feeding device 200 provided at the lower part of the copying machine main body, a plurality of paper feeding cassettes 44 that can accommodate a plurality of sheets stacked in a bundle of sheets are arranged in a stack in the vertical direction. ing.

  Each paper feed cassette 44 presses the paper feed roller 42 against the uppermost paper in the paper bundle. Then, by rotating the paper feed roller 42, the uppermost paper is sent out toward the paper feed path 46.

  The paper feed path 46 that receives the paper fed from the paper feed cassette 44 has a plurality of transport roller pairs 47 and a registration roller pair 49 provided near the end in the path. Then, the sheet is conveyed toward the registration roller pair 49. The sheet conveyed toward the registration roller pair 49 is sandwiched between the rollers of the registration roller pair 49.

  On the other hand, in the intermediate transfer unit 17, the four-color toner image formed on the intermediate transfer belt 110 enters the secondary transfer nip as the belt moves endlessly. The registration roller pair 49 sends out the sheet sandwiched between the rollers at a timing at which the sheet can be brought into close contact with the four-color toner image at the secondary transfer nip. As a result, at the secondary transfer nip, the four-color toner image on the intermediate transfer belt 110 is in close contact with the paper. Then, it is secondarily transferred onto the paper and becomes a full color image on the white paper.

  The paper on which the full-color image is formed in this way exits the secondary transfer nip as the paper transport belt 24 moves endlessly, and then is sent from the paper transport belt 24 to the fixing device 25.

  The fixing device 25 includes a belt unit that moves the fixing belt 26 endlessly while being stretched by two rollers, and a pressure roller 27 that is pressed toward one roller of the belt unit.

  The fixing belt 26 and the pressure roller 27 are in contact with each other to form a fixing nip, and the paper received from the paper transport belt 24 is sandwiched between them.

  Of the two rollers in the belt unit, the roller that is pressed from the pressure roller 27 has a heat source therein, and pressurizes the fixing belt 26 by the heat generated by the heat source. The fixing belt 26 that has been pressed heats the paper that is sandwiched in the fixing nip. The full color image is fixed on the paper by the influence of the heating and the nip pressure.

  The paper subjected to the fixing process in the fixing device 25 is stacked on the stack portion 57 provided on the outer side of the left side plate in FIG. 1 of the printer housing or forms a toner image on the other surface. To the secondary transfer nip described above.

  When a document is copied, for example, a bundle of sheet documents is set on the document table 30 of the automatic document feeder 400.

  However, when the original is a single-sided original that is closed in a main form, it is set on the contact glass 32. Prior to this setting, the automatic document feeder 400 is opened with respect to the copying machine main body, and the contact glass 32 of the scanner 300 is exposed. Thereafter, the single-bound original is pressed by the closed automatic document feeder 400.

  When the copy start switch is pressed after the document is set in this way, the document reading operation by the scanner 300 starts.

  However, when a sheet document is set on the automatic document feeder 400, the automatic document feeder 400 automatically moves the sheet document to the contact glass 32 prior to the document reading operation.

  In the document reading operation, first, the first traveling body 33 and the second traveling body 34 both start traveling, and light is emitted from a light source provided in the first traveling body 33. Then, the reflected light from the document surface is reflected by a mirror provided in the second traveling body 34, passes through the imaging lens 35, and then enters the reading sensor 36. The reading sensor 36 constructs image information based on the incident light.

  In parallel with such a document reading operation, each device in each of the process cartridges 18Y, 18M, 18C, 18K, the intermediate transfer unit 17, the secondary transfer device 22, and the fixing device 25 starts driving.

  Based on the image information constructed by the reading sensor 36, the optical writing unit 21 is driven and controlled, and Y, M, C, and K toner images are formed on the respective photoreceptors 1Y, 1M, 1C, and 1K. Is done. These toner images become four-color toner images superimposed and transferred on the intermediate transfer belt 110.

  Further, almost simultaneously with the start of the document reading operation, the paper feeding operation is started in the paper feeding device 200. In this paper feeding operation, one of the paper feeding rollers 42 is selectively rotated, and the paper is sent out from one of the paper feeding cassettes 44 accommodated in the paper bank 43 in multiple stages. The fed sheets are separated one by one by the separation roller 45 and enter the paper feed path 46, and then conveyed toward the secondary transfer nip by the conveyance roller pair 47.

  In some cases, paper feeding from the manual feed tray 51 is performed instead of such paper feeding from the paper feeding cassette 44. In this case, after the manual feed roller 50 is selectively rotated to feed the paper on the manual tray 51, the separation roller 52 separates the paper one by one and feeds it to the manual feed path 53 of the printer unit 100. .

  In the case of forming another color image composed of two or more colors of toner, the copying machine stretches the intermediate transfer belt 110 so that the upper stretched surface thereof is substantially horizontal, Photoconductors 1Y, 1M, 1C, and 1K are brought into contact with each other.

  On the other hand, when a monochrome image consisting of only K toner is formed, the mechanism is such that the intermediate transfer belt 110 is tilted to the lower left in the figure, and the upper stretched surface is used for Y, M, and C. Separated from the photoreceptors 1Y, 1M, 1C.

  Of the four photoconductors 1Y, 1M, 1C, and 1K, only the K photoconductor 1K is rotated counterclockwise in the drawing to form only the K toner image. At this time, for Y, M, and C, not only the photoreceptor 1 but also the developing device is stopped to prevent unnecessary consumption of the photoreceptor 1 and the developer.

  The present copying machine includes a control unit including a CPU that controls the following devices in the copying machine, and an operation display unit including a liquid crystal display, various key buttons, and the like.

  The operator sends a command to the control unit by a key input operation on the operation display unit, so that one of three modes is selected from the three-sided print mode, which is a mode for forming an image only on one side of the paper. Can be selected. The three single-sided printing modes include a direct discharge mode, a reverse discharge mode, and a reverse decal discharge mode.

Next, a paper feeding device that is a characteristic part of the present embodiment will be described.
(Example)
First, an example of a paper feeding device according to the present embodiment will be described.
FIG. 2 is a schematic cross-sectional view illustrating a schematic configuration of the sheet feeding device according to the embodiment.
As shown in FIG. 2, the paper feeding device 200 is slidable in the paper feeding direction between a position for taking in and out the paper P and a position for feeding the image forming apparatus main body 500. A paper feed tray 201 slidable in a direction orthogonal to the direction is provided. The sliding direction is not limited to the direction orthogonal to the paper feeding direction, and may be a direction intersecting the paper feeding direction. Further, the paper feeding device 200 includes a paper feeding roller 202 that feeds the paper P to the image forming apparatus main body 500 side, and a paper pressing arm 203 as a pressing member that presses the paper P against the tray base 201a of the paper feeding tray 201. It has.

  The paper feed tray 201 is provided with a pair of side fences 201b that hold and guide the paper P according to the size of the paper P from both sides in a direction orthogonal to the paper feeding direction. The sheet P is conveyed by the sheet feeding roller 202 to the downstream side in the sheet feeding direction indicated by the arrow A in FIG. On the back side of the bottom plate of the paper feed tray 201, a pair of first guide rails 201c is provided as a first moving mechanism for guiding the paper feed tray 201 in the paper feed direction.

  Further, on the back side of the bottom plate of the paper feed tray 201, as shown in FIGS. 4B and 5B described later, a second moving mechanism for guiding the paper feed tray 201 in a direction perpendicular to the paper feed direction. A pair of second guide rails 201g is also provided. Note that a separation roller pair 501 is provided on the image forming apparatus main body 500 side to separate the sheets P fed by the sheet feeding roller 202 one by one. The pair of separation rollers 501 is in contact with the front surface of the paper P and rotates so as to be conveyed downstream in the paper feeding direction of the paper P, and is in contact with the back surface of the paper P to supply the paper P. The second roller rotates to return to the upstream side in the paper direction.

  Further, the paper pressing arm 203 is held by the arm holding device 204 and moves up and down with respect to the upper surface of the paper P to press the paper P or release the press. Specifically, when sliding to the upstream side in the paper feeding direction indicated by the arrow B direction in FIG. 2, the paper pressing arm 203 is lowered by the mechanism of the arm swing control cam 205 fixed to the housing. To hold the upper surface of the paper P. At that time, the arm holding device 204 also moves together with the tray base 201a of the paper feed tray 201. On the other hand, when sliding to the downstream side in the paper feeding direction indicated by arrow A in FIG. 2, the paper presser arm 203 is raised by the mechanism of the arm swing control cam 205 and the press on the upper surface of the paper P is released. Is done.

  The paper feed tray 201 includes a tray side cover 201d and a tray front cover 201e, and a tray handle 201f is attached to the tray front cover 201e. The arm swing control cam 205 may be switched by a mechanical cam or an electrical switch by a motor or the like.

FIG. 3 is a schematic cross-sectional view illustrating a state where the paper is jammed on the paper transport path in a state where the paper straddles between the paper feed tray and the apparatus main body.
As shown in FIG. 3, the paper transport path in a state where the paper P straddles between the paper feed tray 201 and the image forming apparatus main body 500 due to, for example, a paper setting state or a paper transport timing delay. There may be a paper jam on the top. Specifically, the jammed paper (hereinafter referred to as a “crying jammed paper”) P remains in a state of straddling between the paper feeding roller 202 and the pair of separation rollers 501, which is a so-called tearing jammed state. In this state, when the operator slides the tray handle 201f in the paper feed tray pulling direction indicated by the arrow C in FIG. 3, the tearing jam paper P interferes with the housing of the image forming apparatus main body 500 and is torn. The torn sheet remains on the sheet conveyance path. This remaining sheet is called a remaining sheet. In some cases, the remaining paper may develop into another problem. For example, when the paper feed tray is pulled out, the remaining paper may fall behind the paper feed tray. In this case, a serviceman is required for a paper feed device in which the paper feed tray cannot be taken out from the image forming apparatus main body.

FIG. 4 is a diagram for explaining an operation of removing crying jammed paper in the paper feeder of the embodiment. 4A is a schematic sectional view, and FIG. 4B is a side view as seen from the image forming apparatus main body side.
As shown in FIG. 4B, the sheet pressing arm 203 is supported by a rotating shaft 203a. When a paper jam in the above-mentioned tearing jam state occurs, the paper presser arm 203 is pivoted and lowered about the rotation shaft 203a by the mechanism of the arm swing control cam 205, and the tearing jammed paper P on the tray base 201a is removed. Hold down from above. In this state, as shown in FIG. 4A, the operator moves the tray handle 201f to the upstream side in the paper feeding direction in the direction of arrow B in FIG. 4A, and moves the paper feeding tray 201 to the pair of first guides. Slide along the rail 201c. Thus, the operator can manually pull out the jammed paper P from the paper feed port 500a of the image forming apparatus main body 500 in conjunction with the slide of the paper feed tray 201 without the need to manually pull out the jammed paper P. it can. If the amount of the paper to be pulled out is the length in the paper feeding direction for one sheet, the jammed paper P can be pulled out, but the downstream end of the paper tearing direction in the paper feeding direction is the paper feed tray 201 and the image forming apparatus main body. The amount of movement that can move to the upstream side in the paper feeding direction from the boundary portion with 500 may be sufficient. Specifically, it corresponds to the length of the paper in the paper feeding direction on the image forming apparatus main body side, and is smaller than the length of the paper in the paper feeding direction. If the paper feed tray 201 can be moved in the direction orthogonal to the paper feed direction with the paper feed tray 201 moved upstream in the paper feed direction, the paper feed tray 201 is moved upstream in the paper feed direction, and crying jammed paper. After P is pulled out from the image forming apparatus main body 500, the sheet feeding tray 201 may be pulled out in the direction of arrow C in FIG.

FIG. 5 is a diagram for explaining crying jam paper removal processing in the paper feeding apparatus according to the embodiment. FIG. 5A is a schematic sectional view, and FIG. 5B is a side view as seen from the image forming apparatus main body. FIG. 6 is a perspective view illustrating the structure of the paper feed tray. FIG. 7 is a partial perspective view illustrating a partial structure of the paper feed tray.
From the state of the paper feed tray 201 shown in FIG. 4, the operator slides the paper feed tray 201 along the pair of first guide rails 201c to the downstream side in the paper feed direction in the direction of arrow A in FIG. 5 as shown in FIG. Thus, the image forming apparatus main body 500 is returned to the position for feeding. At this time, by the mechanism of the arm swing control cam 205, the press of the crying jammed paper P by the paper presser arm 203 is released.

  Further, the leading end of the tearing jam paper P on the downstream side in the paper feeding direction comes into contact with the nip portion or roller surface of the separation roller pair 501, so that the paper feeding tray 201 moves downstream in the paper feeding direction in the direction of arrow A in FIG. Do not follow the slide. The separation roller pair 501 functions as a regulating member. Further, as shown in FIGS. 6 and 7, the tray base 201 a crys apart and presses the jammed paper P against the paper feed roller 202 in a state where the pressure rotating shaft 206 is coupled to the ascending cam mechanism 502. The tearing jammed paper P moves relative to the slide of the paper feed tray 201 toward the downstream side in the paper feed direction in the direction of arrow A in FIG. As a result, the tear-free jammed paper P is accommodated inside the paper feed tray 201 when the paper feed tray 201 is returned to the position for feeding the image forming apparatus main body 500.

  Here, in order to transport the paper P in the paper feed tray 201, the paper P on the paper feed tray 201 is raised, pressed against the paper feed roller 202, and can be transported by rotating the paper feed roller 202. There are a method of raising the tray base 201a by a motor or the like, and a method of raising the paper feed tray by a cam mechanism and a pressure spring when it is pressed against the apparatus main body in the setting direction. The embodiment adopts the latter method. .

  Specifically, when the paper feed tray 201 is set in the image forming apparatus, the connecting pin 206a of the pressure rotating shaft 206 on the paper feed tray 201 side rotates the ascending cam mechanism 502 on the image forming apparatus main body side. Insert into the groove provided on the shaft. At that time, due to the shape of the groove of the ascending cam mechanism 502, the force in the direction in which the pressure spring 503 attached to the ascending mechanism support member 504 fixed to the housing or the like of the image forming apparatus main body extends is a pressure rotating shaft. Join 206. The pressure rotating shaft 206 is connected to the tray base 201a, and the tray base 201a is raised by the spring force (shrinking force) of the pressure spring 503. Accordingly, the sheet P is raised and pressed by the sheet feeding roller 202, and the sheet can be fed. When the paper feed tray 201 is pulled out from the image forming apparatus main body 500, the pressure rotating shaft 206 is pulled out of the ascending cam mechanism 502, and the tray base 201a is lowered to the bottom surface of the paper feed tray 201 by its own weight. In FIG. 3, the pressure rotating shaft 206 is also removed from the ascending cam mechanism 502 when the tray base 201 a moves to the upstream side in the paper feeding direction indicated by the arrow B in FIG. 3.

FIG. 8 is a schematic cross-sectional view for explaining a tear-free jammed paper removal process in the paper feeder of the embodiment.
As shown in FIG. 8, the operator pulls the tray handle 201f to the front side (the direction side orthogonal to the paper feeding direction). Then, the paper feed tray 201 that accommodates the entire tear-separated jammed paper P is moved in the front direction indicated by the arrow C in FIG. 8 along the pair of second guide rails 201g shown in FIGS. 4B and 5B. Pulled out. As a result, the tear-free jammed paper P can be pulled out without interfering with the housing or the like of the image forming apparatus main body 500. At this time, as shown in FIG. 7, the pressure rotating shaft 206 is pulled out of the ascending cam mechanism 502, and the tray base 201 a is lowered to the bottom surface of the paper feed tray 201 by its own weight. It should be noted that when pulling out the paper feed tray 201 that accommodates the whole crying jammed paper P, it is not always necessary to press the crying jammed paper P by the paper presser arm 203, but by pressing the crying separated jammed paper P, the paper feed tray 201 Make sure it is pulled out in the state of being housed in the container.
As described above, according to the embodiment, even if the paper feed tray is pulled out in a direction orthogonal to the paper feed direction, tearing jammed paper does not interfere with the image forming apparatus main body and is not torn. Therefore, the processing operation for removing the torn paper and the operation for processing another problem caused by the torn paper become unnecessary, and the simplification of the paper jam processing operation can be improved.

(Modification 1)
Next, a modification of the sheet feeding device according to the present embodiment (hereinafter, this modification is referred to as “modification 1”) will be described.
FIG. 9 is a schematic cross-sectional view for explaining crying jammed paper removal processing in the paper feeder of the first modification.
As shown in FIG. 9, in the paper feeding device 400 according to the first modification, the remaining paper for detecting whether or not the jammed paper P exists on the paper conveyance path between the paper feeding tray 201 and the image forming apparatus main body 500. A sensor 401 is provided.
Normally, a paper jam is detected when a paper discharge sensor is provided at the paper discharge outlet and the paper discharge sensor cannot detect the paper at the paper discharge timing. Stop the paper. At this time, if the remaining paper sensor 401 detects the paper P, it is determined that a tearing jam has occurred, and if no paper is detected, it is determined that a paper jam has occurred in another location. To do. When it is determined by such a detection means that the paper discharge is jammed and the remaining paper sensor 401 determines that there is remaining paper, for example, a jam display or a display LED (display LED (LCD) on the operation panel is displayed. Turn on the Light Emitting Diode). Alternatively, a voice announcement or a guidance display such as “Since a crying jam has occurred, please move the paper feed tray to the left and right to release it” and prompt the jam paper removal process. After the processing is executed, since there is no paper remaining in the remaining paper sensor, a voice announcement or a guidance display is displayed indicating that (the tearing jam has been canceled and the paper feed tray can be pulled out as it is). As a result, it is possible to prevent the paper feed tray from being pulled out in the front direction by mistake when a tearing jam occurs.

(Modification 2)
Next, another modified example of the sheet feeding device according to the present embodiment (hereinafter, this modified example is referred to as “modified example 2”) will be described.
FIG. 10 is a schematic cross-sectional view illustrating the tearing-away jammed paper removal process in the paper feeder of the second modification.
As shown in FIG. 10, a paper feed device 600 according to the second modification includes a remaining paper sensor 401 in the paper feed device according to the first modification, and a first position sensor that detects a predetermined position of the paper feed tray 201. 601 and a second position sensor 602 are provided. The first position sensor 601 is a sensor that detects the position of the paper feed tray 201 that feeds the image forming apparatus main body 500. On the other hand, the second position sensor 602 is a sensor that detects a position when the sheet feeding tray 201 slides along the pair of first guide rails 201c at the maximum on the left side in FIG. Further, the tray drive motor 603 as a drive source for sliding the paper feed tray 201 in the paper feed direction, the slide of the paper feed tray 201 in the front direction is permitted (restriction is released), or is not permitted (restricted). A lock solenoid 604 is provided as limiting means. The tray drive motor 603 and the lock solenoid 604 are controlled by a control device. The tray drive motor 603 may be a stepping motor or a DC motor. For example, the lock solenoid 604 is provided with a hooking portion on a movable member, and the hooking portion is hooked on the housing of the paper feed tray, thereby restricting sliding of the paper feed tray 201 to the front side. On the other hand, the paper feed tray 201 can be slid to the front side by removing the hooking portion.
As described above, even if a tearing jam occurs, the release is automatically performed without bothering the operator's hand, and the paper tray cannot be pulled out by mistake during the cancellation. It becomes possible to prevent damage.

  Note that when the paper feed tray 201 is slid to the upstream side in the paper feed direction in the direction of arrow B in FIG. 10 to remove the remaining paper, the remaining paper sensor 401 is reconfirmed assuming that it cannot be removed at once. . If it is determined that there is a remaining sheet, it is more reliable to repeat the above operation again so that there is no remaining sheet. In addition, as described above, crying jam is detected and automatically eliminated, so the operator displays a warning message on the LCD on the operation panel that "Crying jam has occurred and is being released", or a voice message Make an announcement. Accordingly, it is necessary to prevent the sheet feeding tray from being pulled out in the front direction when the sheet feeding tray is slid in the sheet feeding direction. It is also necessary to lock the paper feed tray 201 so as not to be pulled out in the front direction using the lock solenoid 604.

Next, the tearing jam paper removal processing operation in the paper feeder of the second modification will be described with reference to the operation flow of FIG.
In FIG. 11, when the conveyance of the paper P is started, the paper feed tray 201 in FIG. 10 is locked by the lock solenoid 604 so as not to be pulled out in the front direction (steps S101 and S102). When the paper P is jammed, the driving of the paper supply roller 202 is stopped and the conveyance of the paper P is stopped (steps S103 and S104). If it is determined by the remaining paper sensor 401 that the tearing jam has occurred (step S105: YES, step S106), the arm swing control cam 205 is switched, and the tearing jammed paper P is pressed from above by the sheet pressing arm 203 (step S107). Then, the tray drive motor 603 is driven by the control device, and the paper feed tray 201 is slid to the upstream side in the paper feed direction in the direction of arrow B in FIG. 10 until the second position sensor 602 detects it. The sheet is pulled out through the paper feed port 500a of the apparatus main body 500 (step S108, step S109: YES, step S110).

  Thereafter, the arm swing control cam 205 is switched, and the press of the paper jam to the paper P by the paper press arm 203 is released (step S111). Then, the tray drive motor 603 is driven by the control device, and the paper feed tray 201 is slid downstream in the paper feed direction in the direction of arrow A in FIG. 10 until the first position sensor 601 detects the paper feed tray 201 to form an image. It returns to the position for feeding paper to the apparatus main body 500 (step S112, step S113: YES, step S114). As a result, the tear-free jammed paper P is accommodated in the paper feed tray 201.

  Thereafter, the lock is released by the lock solenoid 604 so that the paper feed tray 201 can be pulled out along the pair of second guide rails 201g (step S115). If it is determined in step S105 that the remaining paper sensor 401 does not determine that a tearing jam has occurred, a jam other than the tearing jam, that is, a paper in a location different from the paper transport path between the paper feed tray 201 and the image forming apparatus main body 500 is detected. It is determined that clogging has occurred (step S105: NO, step S116). Note that the operation of the tray base 201 a also moves up and down according to the operation of the paper feed tray 201. Thus, the tearing-away jammed paper removal process is automatically executed without causing paper remaining due to the remaining paper.

(Modification 3)
Next, another modified example of the sheet feeding device according to the present embodiment (hereinafter, this modified example is referred to as “modified example 3”) will be described.
FIG. 12 is a schematic cross-sectional view illustrating the tearing-away jammed paper removal process in the paper feeder of the third modification.
In the third modification, when the remaining paper sensor 401 stops the paper and a tearing jam occurs, the paper conveyance distance is determined by the feed amount (drive amount) of the paper feed roller 202 with respect to the paper P sent from the paper feed tray 201. Is calculated. For example, since the paper P is always conveyed in the paper discharge direction at the same speed, if the paper feed roller 202 is driven by a stepping motor, the paper roll 202 is stopped after the tearing jam is detected. The sheet conveyance distance is calculated from the drive pulse amount. Further, if the operation is performed by receiving a transmission from another drive using the clutch, the sheet conveyance distance is calculated by the time from the detection of the tearing jam to the stop of the sheet feeding roller 202.

  As another means, if the remaining sheet sensor 401 is used, the remaining sheet sensor 401 is cryed and the jammed paper P passes from the time when the jammed paper P passes. The sheet stop position can be grasped from 401, and the moving amount (drawing amount) of the crying jammed paper P can be calculated. Whether the paper feed roller 102 or the remaining paper sensor 401 is converted, the movement amount of the jammed paper P can be calculated by the sum of the specified movement amount A and the movement amount a. Then, when the remaining paper sensor 401 determines that the jammed paper P is stopped, the paper transport distance is calculated, and the paper feed tray 201 is fed by the controller by the tray drive motor 603 by the transport distance corresponding to the movement amount. The paper tray 201 is slid to the upstream side in the paper feeding direction indicated by the arrow B in FIG. Thus, the tearing-away jammed paper removal process is automatically executed without causing paper remaining due to the remaining paper.

Next, the tearing-out jammed paper removal processing operation in the paper feeder of Modification 3 will be described according to the operational flow of FIG.
In FIG. 13, when the conveyance of the paper P is started, the paper feed tray 201 in FIG. 12 is locked by the lock solenoid 604 so as not to be pulled out in the front direction (steps S201 and S202). When a paper jam occurs, the driving of the paper feed roller 202 is stopped and the conveyance of the paper P is stopped (steps S203 and S204). If it is determined by the remaining paper sensor 401 that the tears are separated (step S205: YES, step S206), the movement amount of the paper feed tray 201 is calculated from the stop position of the paper jammed paper P (step S207). Then, the arm swing control cam 205 is switched, and the tearing jam paper P is pressed by the paper pressing arm 203 (step S208). Then, the tray drive motor 603 is driven by the control device, and the paper feed tray 201 is slid to the upstream side in the paper feed direction in the direction of arrow B in FIG. The sheet is pulled out through the sheet feeding port 500a of the forming apparatus main body 500 (steps S209 and S210).

  Thereafter, the arm swing control cam 205 is switched, and the paper jam by the paper pressing arm 203 is released from the paper P (step S211). Then, the tray drive motor 603 is driven by the control device, and the paper feed tray 201 is slid downstream in the paper feed direction in the direction of arrow A in FIG. It returns to the position for feeding to the apparatus main body 500 (step S212, step S213: YES, step S214). As a result, the tear-free jammed paper P is accommodated inside the paper feed tray 201.

  Thereafter, the lock is released by the lock solenoid 604 so that the paper feed tray 201 can be pulled out along the pair of second guide rails 201g (step S215). If it is determined in step S205 that the remaining paper sensor 401 does not determine that a tearing jam occurs, a jam other than the tearing jam, that is, a paper in a location different from the paper transport path between the paper feed tray 201 and the image forming apparatus main body 500 is detected. It is determined that clogging has occurred (step S205: NO, step S216). Thus, the tearing-away jammed paper removal process is automatically executed without causing paper remaining due to the remaining paper.

(Modification 4)
Next, another modified example of the sheet feeding device according to the present embodiment (hereinafter, this modified example is referred to as “modified example 4”) will be described.
FIG. 14 is a flowchart for explaining an operation for removing crying jammed paper in the paper feeder of the fourth modification.
In FIG. 14, when the conveyance of the paper P is started, the paper feed tray 201 in FIG. 12 is locked by the lock solenoid 604 so as not to be pulled out along the pair of second guide rails 201g (step S301). , S302). When a paper jam occurs in the paper P, the driving of the paper feed roller 202 is stopped and the transport of the paper P is stopped (steps S303 and S304). If it is determined by the remaining paper sensor 401 that the paper is jammed (step S305: YES, step S306), the arm swing control cam 205 is switched, and the paper presser arm 203 presses the jammed paper P from above (step S307). Then, the control unit causes the tray drive motor 603 to slide the paper feed tray 201 upstream in the paper feed direction in the direction of arrow B in FIG. 12 until the remaining paper sensor 401 no longer detects (step S308, step S309: NO). Furthermore, the control unit drives the tray drive motor 603 to slide the paper feed tray 201 to the upstream side in the paper feed direction in the direction of arrow B in FIG. The image forming apparatus main body 500 is pulled out through the paper feed port 500a (steps S310 and S311).

  Thereafter, the arm swinging control cam 205 is switched, and the pressing on the jammed paper P by the paper pressing arm 203 is released (step S312). Then, the controller drives the tray drive motor 603 to move the paper feed tray 201 downstream in the paper feed direction in the direction of arrow A in FIG. 12 until the first position sensor 601 detects the paper feed tray 201, thereby forming the image of the paper feed tray 201. It returns to the position for feeding paper to the apparatus main body 500 (step S313, step S314: YES, step S315). As a result, the tear-free jammed paper P is accommodated in the paper feed tray 201. The lock is released by the lock solenoid 604 so that the paper feed tray 201 can be pulled out in the front direction along the pair of second guide rails 201g (step S316). If it is determined in step S305 that the remaining paper sensor 401 does not determine that a tearing jam occurs, a jam other than the tearing jam, that is, a paper in a location different from the paper transport path between the paper feed tray 201 and the image forming apparatus main body 500 is detected. It is determined that clogging has occurred (step S305: NO, step S317). Thus, the tearing-away jammed paper removal process is automatically executed without causing paper remaining due to the remaining paper. Further, depending on the stop position of the tearing jam paper, the amount of movement to pull out the paper feed tray to the upstream side in the paper feeding direction is smaller than in the above-described embodiment and the first to third modifications, and the time required for the removal processing of the tearing jam paper is reduced. It can be shortened.

What was demonstrated above is an example, and there exists an effect peculiar for every following aspect.
(Aspect A)
In a sheet feeding device 200 including a sheet feeding tray 201 that accommodates sheets P, a first moving mechanism such as a first guide rail 201c that can move the sheet feeding tray in the sheet feeding direction, and the sheet feeding tray. And a second moving mechanism such as a second guide rail 201g that can move in a direction crossing the direction.
According to this aspect, during the movement of the paper feed tray by the first movement mechanism, the jammed paper (hereinafter referred to as tearing jammed paper) remaining on the paper transport path in a state straddling between the paper feed tray and the image forming apparatus. Is held in the paper feed tray by an operator or a holding means, for example, the tearing jam paper can be interlocked with the movement of the paper feed tray. Then, by using the first moving mechanism, the paper feed tray is moved so that the leading end of the tearing jam paper downstream in the paper feed direction moves upstream of the boundary between the image forming apparatus and the paper feed tray. By moving the sheet, it is possible to eliminate the state where the sheet straddles between the sheet feeding tray and the image forming apparatus. Therefore, before the paper feed tray is moved in the direction crossing the paper feed direction using the second movement mechanism, the paper feed direction is set to be greater than the position where the paper feed tray is fed to the image forming apparatus using the first movement mechanism. By moving to the upstream side, the sheet does not overlap the image forming apparatus when viewed from the direction intersecting the sheet feeding direction. Thereafter, by using the second moving mechanism, the paper feed tray is moved in a direction crossing the paper feed direction, whereby the paper can be pulled out without contacting the image forming apparatus. For example, the sheet feed tray that has been moved to the upstream side in the sheet feeding direction from the sheet feeding position to the image forming apparatus is moved in the direction intersecting the sheet feeding direction using the second movement mechanism. . The paper at that time can be pulled out without contacting the image forming apparatus together with a paper feed tray holding the paper, for example, by an operator or holding means. Further, for example, the sheet feeding tray that has been moved to the upstream side in the sheet feeding direction from the sheet feeding position to the image forming apparatus is returned to the sheet feeding position to the image forming apparatus using the first moving mechanism. At this time, for example, by releasing the holding of the paper to the paper feed tray by the operator or the holding means and allowing the paper to move freely, the paper moves relative to the movement of the paper feed tray and moves inside the paper feed tray. Is housed in. The paper feed tray in that state is moved in a direction crossing the paper feed direction using the second moving mechanism. The paper at that time is stored in the paper feed tray and can be pulled out without contacting the image forming apparatus. Therefore, it is possible to remove the tear jammed paper without tearing it, and there is no processing work to remove the torn paper, and there is no work to deal with other troubles caused by the torn paper, simplifying the paper jam handling work Can be According to this aspect, the space in which the sheet feeding tray is pulled out in the direction intersecting the sheet feeding direction using the second moving mechanism is on the near side in the short direction of the image forming apparatus having a long planar shape. Therefore, the space in which the sheet feeding tray is pulled out in the sheet feeding direction is not increased compared to the conventional configuration in which the image forming apparatus is on the front side in the longitudinal direction. Therefore, it is possible to simplify the paper jam handling operation by suppressing the enlargement of the apparatus and pulling it out of the image forming apparatus without tearing the tear jammed paper.

(Aspect B)
In (Aspect A), at least during the movement of the paper feed tray by the first moving mechanism, holding means such as a paper presser arm 203 that holds the paper in the paper feed tray so that the paper can move together with the paper feed tray It is characterized by providing.
According to this aspect, while the paper feed tray is being moved by the first movement mechanism, the holding means holds the jammed paper in the paper feed tray, thereby saving the operator from having to cry and pressing the jammed paper and removing the jammed paper. It is securely held in the paper feed tray and can be pulled out stably in conjunction with the movement of the paper feed tray.

(Aspect C)
In (Aspect B), the paper feed tray is moved to the upstream side in the paper feed direction from the boundary between the image forming apparatus that feeds paper using the first moving mechanism and the paper feed tray. The holding means releases the holding of the paper in the paper feeding tray, restricts movement of the paper downstream in the paper feeding direction by a regulating member, and uses the first moving mechanism to feed the paper feeding tray in the paper feeding direction. The sheet is moved downstream to be accommodated in the sheet feeding tray, and then the sheet feeding tray is moved in a direction crossing the sheet feeding direction by using the second moving mechanism.
According to this aspect, the tearing jammed paper moved to the upstream side in the paper feeding direction from the image forming apparatus is accommodated in the paper feeding tray. The paper feed tray is moved in a direction crossing the paper feed direction, and the paper is taken out of the image forming apparatus together with the paper feed tray. As a result, the tearing jam paper can be removed without tearing. Therefore, it is not necessary to remove the torn sheet or handle another problem caused by the torn sheet, and the paper jam handling operation can be simplified.

(Aspect D)
In (Aspect C), the holding unit includes a pressing member such as a sheet pressing arm 203 that presses the sheet from above.
According to this aspect, it is possible to make the crying jammed paper moveable together with the paper feed tray with a simple configuration.

(Aspect E)
In (Aspect A) to (Aspect D), a sensor such as a remaining paper sensor 401 that detects a stopped paper on the paper transport path is provided, and the paper feed tray is moved in a direction crossing the paper feed direction. When it is determined that the sheet exists on the sheet conveyance path based on the detection result of the sensor, it is urged to perform processing for removing the sheet, and it is determined that the sheet does not exist on the sheet conveyance path. In this case, the second moving mechanism is used to move the paper feed tray in a direction crossing the paper feed direction.
According to this aspect, when a paper jam occurs, it is possible to prevent the operator from moving the paper feed tray in a direction crossing the paper feed direction by mistake.

(Aspect F)
In (Aspect A) to (Aspect E), the first moving mechanism has a drive source such as a tray drive motor 603.
According to this aspect, when a paper jam occurs, the jammed paper can be automatically removed from the image forming apparatus without bothering the operator.

(Aspect G)
In (Aspect A) to (Aspect F), a restriction unit such as a lock solenoid 604 that restricts the paper feed tray from moving in a direction crossing the paper feed direction is provided, and a paper jam occurs in the image forming apparatus. If it is, the restricting means restricts the movement of the paper feed tray in the direction intersecting the paper feed direction.
According to this aspect, it is possible to prevent the paper feed tray from being erroneously moved in the direction intersecting the paper feed direction and tearing apart and tearing the jammed paper.

(Aspect H)
In (Aspect A) to (Aspect G), an amount of movement of the paper feed tray to the upstream side in the paper feed direction is calculated to remove the paper based on position information of the paper present on the paper transport path. A calculating means is provided.
According to this aspect, it is possible to suppress the wasteful movement of the paper feed tray by moving the paper feed tray to the upstream side in the paper feed direction by the amount of movement calculated by the calculation means, and the tearing jam paper removal process described above Can be shortened.

(Aspect I)
In (Aspect A) to (Aspect H), when it is determined that the paper does not exist on the paper conveyance path based on the detection result of the sensor, a paper jam occurs in a place other than the paper conveyance path. And urging the user to perform a process of eliminating a paper jam at that location.
According to this aspect, when the paper jam is in a location other than the paper transport path, the operator is prompted to perform the paper jam removal processing at that location, so that the operator can appropriately remove the paper jam. Processing operations can be performed.

(Aspect J)
In an image forming apparatus including a sheet feeding unit that feeds a sheet to an image forming unit, the sheet feeding device of (Aspect A) to (Aspect I) is used as the sheet feeding unit.
According to this aspect, when a paper jam occurs on the paper transport path with the paper straddling between the paper feed tray and the apparatus main body, it is possible to improve the simplification of the processing operation for removing the paper jammed paper. An image forming apparatus capable of performing the above can be realized.

DESCRIPTION OF SYMBOLS 100 Printer part 200 Paper supply apparatus 201 Paper supply tray 201a Tray base 201b Side fence 201c 1st guide rail (1st moving mechanism)
201d Tray side cover 201e Tray front cover 201f Tray handle 201g Second guide rail (second moving mechanism)
202 Paper feed roller 203 Paper presser arm (holding means)
204 Arm holding device 205 Arm swing control cam 206 Pressure rotating shaft 400 Paper feed device 401 Remaining paper sensor 500 Image forming apparatus main body 500a Paper feed port 501 Separating roller pair 502 Lifting cam mechanism 503 Pressure spring 504 Lifting mechanism support member 600 Paper feeding device 601 First position sensor 602 Second position sensor 603 Tray drive motor 604 Lock solenoid

JP 2009-203064 A JP 2009-190869 A

Claims (10)

In a paper feeding device having a paper feeding tray for storing paper,
A first movement mechanism that allows the paper feed tray to move in the paper feed direction;
A sheet feeding device comprising: a second moving mechanism that allows the sheet feeding tray to move in a direction intersecting a sheet feeding direction. The paper feeding device according to claim 1.
A sheet feeding device comprising: a holding unit configured to hold a sheet in the sheet feeding tray so that the sheet can move together with the sheet feeding tray at least during the movement of the sheet feeding tray by the first moving mechanism. The sheet feeding device according to claim 2,
After the paper feed tray is moved to the upstream side in the paper feed direction from the boundary between the image forming apparatus that feeds paper using the first moving mechanism and the paper feed tray, the paper feed by the holding unit The holding of the paper in the tray is released, the movement of the paper to the downstream side in the paper feeding direction is regulated by a regulating member, and the paper is fed to the downstream side in the paper feeding direction by using the first moving mechanism. A sheet feeding device which is moved so as to be accommodated in a sheet feeding tray, and thereafter, the sheet feeding tray is moved in a direction crossing the sheet feeding direction using the second moving mechanism. In the paper feeding device according to claim 2 or 3,
The sheet feeding device, wherein the holding unit includes a pressing member that presses the sheet from above. In the paper feeding device according to any one of claims 1 to 4,
A sensor for detecting a stopped paper on the paper transport path, and when the paper feed tray is moved in a direction crossing a paper feed direction, the paper is transported based on a detection result of the sensor; When it is determined that the sheet is present on the path, it is urged to perform processing for removing the sheet. When it is determined that the sheet is not present on the sheet conveyance path, the second feeding mechanism is used to feed the sheet feeding tray. A paper feeding device that moves in a direction that intersects the paper direction. In the paper feeding device according to any one of claims 1 to 5,
The paper feeding device, wherein the first moving mechanism has a drive source. In the paper feeding device according to any one of claims 1 to 6,
Restriction means for restricting movement of the paper feed tray in a direction crossing the paper feed direction is provided, and when the paper jam occurs in the image forming apparatus, the paper feed tray feed direction by the restriction means A paper feeding device that restricts movement in a direction intersecting with the paper. In the paper feeding device according to any one of claims 1 to 7,
A sheet feeding device comprising: a calculating unit that calculates an amount of movement of the sheet feeding tray to the upstream side in the sheet feeding direction in order to remove the sheet based on position information of the sheet existing on the sheet conveying path. . In the paper feeding device according to any one of claims 1 to 8,
When it is determined that the sheet does not exist on the sheet conveyance path based on the detection result of the sensor, it is determined that a paper jam has occurred in a place other than the sheet conveyance path, and the sheet at that position is determined. A paper feeding device characterized by prompting to perform processing to eliminate In an image forming apparatus including a paper feeding unit that feeds paper to an image forming unit,
An image forming apparatus using the paper feeding device according to claim 1 as the paper feeding means.

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