JP4311265B2 - Paper feeding device and image forming apparatus - Google Patents

Description

  The present invention relates to a sheet feeding device and an image forming apparatus. Specifically, a sheet feed tray is provided in an image forming apparatus main body, and a manual feed configured to set a sheet bundle to be stored in the apparatus main body. The present invention relates to a sheet feeding device and an image forming apparatus including the sheet feeding device.

In a manual sheet feeder provided in an image forming apparatus using an electrophotographic technology such as an electrophotographic copying machine or a laser printer, a movable sheet that regulates the width direction of a sheet bundle on a sheet placement surface of a sheet feeding tray. A paper supply device (for example, see Patent Document 1) provided with a guide (guide member) and a paper size label for allowing the user to recognize the paper size, or set in a main body of the image forming apparatus so as to store a bundle of paper A paper feeding device having a simple configuration in which a sheet bundle does not protrude outside is known (for example, see Patent Document 2).
JP-A-5-319635 JP-A-6-9069

  In such a manual sheet feeding device, it is necessary to accurately set the guide member for regulating the width direction of the sheet bundle according to the sheet width in order to prevent the sheet from being obliquely fed. Is a complicated operation, and there is a strong demand for providing a size display for guiding the set position of the guide member. However, as described above, in the case of a paper feeding device in which the manual paper feeding unit (paper feeding tray) is provided in the image forming apparatus main body and is set so as to store the sheet bundle in the apparatus main body, the size display is performed. Even if it is provided on the paper placement surface, it is difficult to visually recognize from the outside, and there is a problem that the alignment workability of the guide member is poor.

  In consideration of the above facts, the present invention guides the setting position of the guide member even in a configuration in which a paper feed tray for manual feeding is provided in the image forming apparatus main body and the sheet bundle is set to be stored in the apparatus main body. It is an object of the present invention to provide a sheet feeding device and an image forming apparatus in which a size display can be easily visually recognized from the outside and a guide member can be easily aligned.

In order to achieve the above object, the invention according to claim 1 is a longitudinal wall portion that constitutes an outer wall of a housing, a tray portion that is arranged in the housing and on which a sheet bundle is placed on a bottom surface, and the tray portion. Is provided on the bottom surface of the sheet, and is movable substantially along the width direction of the sheet bundle placed on the bottom surface, and is disposed at a predetermined position, thereby restricting the sheet bundle in contact with the side edge of the sheet bundle. A guide member that is provided on the vertical wall portion and through which the sheet bundle loaded into the tray portion from the outside of the casing passes, and an end portion of the guide member that is near the edge of the opening portion. A position display section that is provided in a corresponding portion of the vertical wall section so as to be visible from the outside of the housing and displays a restriction position of the guide member according to the size of the sheet bundle placed on the bottom surface of the tray section; It is characterized by having.

  According to the first aspect of the present invention, when the sheet bundle is set in the sheet feeding device, the guide member provided on the bottom surface of the tray portion of the sheet feeding device is substantially along the width direction of the sheet bundle placed on the bottom surface. It is moved and placed at a predetermined position according to the size of the sheet bundle. When the sheet bundle is placed on the bottom surface of the tray portion, the guide member comes into contact with the side edge of the sheet bundle to regulate the sheet bundle. For example, when the sheets are unloaded one by one from the sheet bundle set in the sheet feeding device. Is prevented from feeding diagonally.

Here, the position where the restriction position of the guide member corresponding to the size of the sheet bundle placed on the bottom surface of the tray portion is displayed at the portion corresponding to the end portion of the guide member in the vertical wall portion constituting the outer wall of the housing A display portion is provided so as to be visible from the outside of the housing . As a result, for example, even in a paper feeding device or the like that is built in the image forming apparatus and the visibility of the bottom surface of the tray unit is lowered, the user can easily see the position display unit provided on the vertical wall unit. The alignment of the guide member can be easily performed from the relationship between the end portion of the guide member and the position display portion.
Further, the position display part is provided in the vicinity of the edge part of the opening part provided on the vertical wall part and through which the sheet bundle loaded in the tray part from the outside of the housing passes.
Thereby, the user can be provided on the vertical wall portion even in a paper feeding device in which the bottom surface of the tray portion can be visually recognized only through the opening portion from the outside, so that the visibility of the bottom surface of the tray portion is further reduced. The position display unit can be easily visually recognized, and the alignment of the guide member can be easily performed from the relationship between the end portion of the guide member and the position display unit.

According to a second aspect of the invention, the sheet feeding apparatus according to claim 1 wherein is characterized by having a cover member for covering the position display unit in closed condition an opening as well as closing the opening.

In the second aspect of the invention, when the opening of the vertical wall portion is closed by the cover member, the position display portion is covered with the cover member and is not unnecessarily exposed. Therefore, the position display portion is provided on the vertical wall portion. It is possible to prevent the appearance of the apparatus from being degraded.

According to a third aspect of the present invention, in the paper feeding device according to the first or second aspect , the guide member regulates both side ends of the sheet bundle placed on the bottom surface of the tray portion and moves the guide member. Is configured by a pair of first guide members and second guide members that can be interlocked so as to be close to and away from each other, and an operation unit for moving and operating the first guide member and the second guide member is the first guide member . It is provided in the guide member or the second guide member , and the position display portion is provided in a portion corresponding to the end portion of the second guide member or the first guide member .

In the invention according to claim 3 , when the user picks up the operation portion provided on the first guide member or the second guide member and moves the pair of first guide member and second guide member , the vertical wall portion Since the position display part provided in the site | part corresponding to the edge part of the 2nd guide member or the 1st guide member in is not hidden with the hand which operates, the visibility of a position display part is not impaired.

According to a fourth aspect of the present invention, in the paper feeding device according to any one of the first to third aspects, the portion where the position display unit is provided is inclined downward toward the outside of the housing . It is characterized by an inclined surface.

In the invention according to claim 4 , a position display that is usually viewed by the user looking down slightly from above obliquely by forming the part provided with the position display part as an inclined surface that is inclined downward toward the outside of the housing. The visibility of the part becomes better.

According to a fifth aspect of the present invention, there is applied an image forming apparatus comprising the paper feeding device according to any one of the first to fourth aspects and an image forming unit.

According to the fifth aspect of the present invention, even in a configuration in which a manual paper feed tray is provided in the image forming apparatus main body and the sheet bundle is set to be stored in the apparatus main body, the size for guiding the setting position of the guide member is provided. An image forming apparatus can be obtained in which the display can be easily visually recognized from the outside and the guide member can be easily aligned.

  Since the sheet feeding device and the image forming apparatus of the present invention have the above-described configuration, a configuration in which a sheet feeding tray for manual feeding is provided in the image forming apparatus main body and a sheet bundle is set to be stored in the apparatus main body, A size display for guiding the set position of the guide member can be easily recognized from the outside, and the guide member can be easily aligned.

  Hereinafter, a sheet feeding device and an image forming apparatus according to an embodiment of the present disclosure will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the image forming apparatus 10 of the present embodiment has an image forming apparatus main body 12, and an opening / closing cover that is rotatable around a hinge portion 14 at the upper part of the image forming apparatus main body 12. For example, a single-stage sheet feeding unit 18 is disposed below the image forming apparatus main body 12.

  The paper feed unit 18 includes a paper feed unit main body 20 and a paper feed tray 22 in which paper is stored. A feed roll 24 that feeds paper from the paper feed tray 22 and a retard roll 26 that sprinkles the fed paper one by one are arranged in the upper vicinity of the rear end of the paper feed tray 22.

  The conveyance path 28 is a sheet path from the feed roll 24 to the discharge port 30, and this conveyance path 28 is in the vicinity of the back side (right side in FIG. 1) of the image forming apparatus main body 12 and will be described later from the sheet feeding unit 18. The fixing device 90 is formed substantially vertically. A secondary transfer roll 80 and a secondary transfer backup roll 72, which will be described later, are arranged on the upstream side of the fixing device 90 in the conveyance path 28, and the registration roll 32 is located upstream of the secondary transfer roll 80 and the secondary transfer backup roll 72. Is arranged. In addition, a discharge roll 34 is disposed in the vicinity of the discharge port 30 of the conveyance path 28.

  Accordingly, the sheet fed from the sheet feeding tray 22 of the sheet feeding unit 18 by the feed roll 24 is turned by the retard roll 26 and only the uppermost sheet is guided to the conveyance path 28, and is temporarily stopped by the registration roll 32. Then, a toner image is transferred between a secondary transfer roll 80 and a secondary transfer backup roll 72, which will be described later. The transferred toner image is fixed by the fixing device 90, and the discharge port 34 discharges the discharge port 30. Are discharged to a discharge portion 36 provided on the upper portion of the opening / closing cover 16. The discharge portion 36 has a low discharge port portion and is inclined so as to gradually increase toward the front direction (left direction in FIG. 1).

  In the image forming apparatus main body 12, for example, a rotary developing device 38 is disposed at a substantially central portion. The rotary developing device 38 includes developing units 42a to 42d that respectively form toner images of four colors of yellow, yellow, magenta, cyan, and black in the developing unit main body 40. It rotates counterclockwise (counterclockwise in FIG. 1) about the rotary developing device center 44. Each of the developing units 42a to 42d has developing rolls 46a to 46d and is pressed in the normal direction of the developing unit main body 40 by elastic bodies 48a to 48d such as coil springs.

  The rotary developing device 38 is arranged so as to rotate, for example, around a rotation support shaft 49 so that an image carrier 50 made of, for example, a photosensitive member comes into contact therewith, and the developing rolls 46 a to 46 d abut against the image carrier 50. When not in contact, a part of each outer periphery protrudes, for example, 2 mm from the outer periphery of the developing device main body 40 in the radial direction. Further, a tracking roll (not shown) having a diameter slightly larger than the diameter of the developing rolls 46a to 46d is provided at both ends of each of the developing rolls 46a to 46d so as to rotate coaxially with the developing rolls 46a to 46d. Yes. In other words, the developing units 42 a to 42 d are arranged on the outer periphery of the developing unit main body 40 at intervals of 90 ° with the rotary developing device center 44 as the center, and the tracking rolls of the developing rolls 46 a to 46 d are arranged at both ends of the image carrier 50. While contacting a provided flange (not shown) and forming a predetermined gap between the developing rolls 46a to 46d and the image carrier 50, the latent image on the image carrier 50 is made of toner of each color. develop.

  Below the image carrier 50, a charging device 52 made of, for example, a charging roll for uniformly charging the image carrier 50 is provided. Further, the image carrier 50 is provided with an image carrier cleaner so as to hang from the rotation support shaft 49, and the image carrier 50 and the image carrier cleaner 54 are integrated. The image carrier cleaner 54 includes, for example, a cleaning blade 56 that scrapes waste toner remaining on the image carrier 50 after primary transfer, and a toner collection bottle 58 that collects waste toner scraped by the cleaning blade 56. The back side (right side in FIG. 1) of the toner collection bottle 58 is formed with a rib or the like, for example, and is curved to form a part of the conveyance path 28 so that the paper is smoothly conveyed.

  On the lower back side of the rotary developing device 38, an exposure device 60 for writing a latent image on the image carrier 50 charged by the charging device 52 with a light beam such as a laser beam is disposed. Further, an intermediate transfer device 62 is provided above the rotary developing device 38. The toner image visualized by the rotary developing device 38 is primarily transferred at the primary transfer position and conveyed to a secondary transfer position described later.

  The intermediate transfer device 62 includes an intermediate transfer member 64 such as an intermediate transfer belt, a primary transfer roll 66, a wrap-in roll 68, a wrap-out roll 70, a secondary transfer backup roll 72, a scraper backup roll 74, and a brush backup roll 76. .

  The intermediate transfer body 64 has elasticity, for example, and is stretched substantially flat so as to have a long side and a short side above the rotary developing device 38. The long sides on the upper and lower sides of the intermediate transfer member 64 are stretched so as to be substantially parallel to, for example, the discharge unit 36 provided on the upper portion of the image forming apparatus main body 12. The intermediate transfer member 64 includes a wrap-in roll 68 disposed upstream of the primary transfer roll 66 below the long side of the intermediate transfer member 64, and a wrap-out roll 70 disposed downstream of the primary transfer roll 66. The image carrier 50 has a primary transfer portion (image carrier wrap region) that comes into contact with the image carrier 50 in a lap state, and is wound around the image carrier 50 by a predetermined range and is driven by the rotation of the image carrier 50. As described above, the intermediate transfer member 64 is primarily transferred by the primary transfer roll 66 while superimposing the toner images on the image carrier 50 in the order of yellow, magenta, cyan, and black, for example. It is conveyed toward the secondary transfer roll 80. Note that the wrap-in roll 68 and the wrap-out roll 70 are separated from the image carrier 50.

  Thus, the intermediate transfer body 64 is stretched by five rolls of the wrap-in roll 68, the wrap-out roll 70, the secondary transfer backup roll 72, the scraper backup roll 74, and the brush backup roll 76, and the primary transfer roll 66, the toner image on the image carrier 50 is transferred.

  Further, a flat portion (short side) is formed on the back side (right side surface in FIG. 1) of the intermediate transfer member 64 by a wrap-out roll 70 and a secondary transfer backup roll 72, and this flat portion is the secondary transfer portion. It faces the conveyance path 28.

  In the secondary transfer portion, the wrap-out roll 70 is arranged so that the intermediate transfer body 64 and the conveyance path 28 are at an angle of 12 °, for example.

  The scraper backup roll 74 assists the scraper 84 described later to scrape waste toner remaining on the intermediate transfer body 64 after the secondary transfer, and the plan backup roll 76 wastes remaining on the intermediate transfer body 64 after the secondary transfer. A brush roll 86 described later assists in scraping off the toner.

  Above the long side of the intermediate transfer body 64, a sensor 78 such as a reflective photosensor is provided by being fixed to the back surface (inside) of the opening / closing cover 16. The sensor 78 reads a toner patch formed on the intermediate transfer body 64, detects the position of the intermediate transfer body 64 in the rotation direction, and detects the toner density.

  A secondary transfer roll 80 is opposed to the secondary transfer backup roll 72 of the intermediate transfer device 62 with the conveyance path 28 interposed therebetween. That is, the secondary transfer position in the secondary transfer portion is between the secondary transfer roll 80 and the secondary transfer backup roll 72, and the secondary transfer roll 80 is intermediate with the assistance of the secondary transfer backup roll 72. The toner image primarily transferred to the transfer body 64 is secondarily transferred onto the paper at the secondary transfer position. Here, the secondary transfer roll 80 is separated from the intermediate transfer member 64 while the intermediate transfer member 64 rotates three times, that is, while the toner images of three colors of yellow, magenta, and cyan are conveyed. When the image is transferred, it contacts the intermediate transfer member 64. Note that a predetermined potential difference is generated between the secondary transfer roll 80 and the secondary transfer backup roll 72. For example, when the secondary transfer port 80 is set to a high voltage, the secondary transfer roll 80 has a secondary voltage. The transfer backup roll 72 is connected to a ground (GND) or the like.

  An intermediate transfer body cleaner 82 is provided at the end of the intermediate transfer body 64 on the side opposite to the image carrier. The intermediate transfer body cleaner 82 includes a scraper 84, a brush roll 86, a toner collection bottle 88, and a rotation support shaft 89, and swings about the rotation support shaft 89. For example, the scraper 84 scrapes off and cleans waste toner remaining on the intermediate transfer member 64 after the secondary transfer. The brush roll 86 further scrapes off the waste toner remaining after cleaning by the scraper 84. The toner collection bottle 88 collects the toner scraped by the scraper 84 and the brush roll 86. The scraper 84 is made of, for example, a thin plate made of stainless steel, and is applied with a voltage having a polarity opposite to that of the toner.

  The brush roll 86 is made of, for example, an acrylic brush that has been subjected to a conductive treatment. While the intermediate transfer member 64 conveys the toner image, the scraper 84 and the brush roll 86 are separated from the intermediate transfer member 64 and come into contact with the intermediate transfer member 64 at a predetermined timing. Has been.

  The intermediate transfer device 62, the image carrier 50, the charging device 52, the image carrier cleaner 54, and the intermediate transfer member cleaner 82 are integrated to form a part of an image forming unit 96 described later.

  A fixing device 90 is disposed above the secondary transfer position. The fixing device 90 includes a heating roll 92 and a pressure roll 94, fixes the toner image secondarily transferred to the sheet by the secondary transfer roll 80 and the secondary transfer backup roll 72, and fixes the toner image to the discharge roll 34. Transport toward.

  Next, the paper feeding unit 18 according to the present embodiment will be described in detail.

  As shown in FIGS. 1 and 2, a vertical wall portion 100 that constitutes a front panel portion of the image forming apparatus main body 12 is provided on the front surface portion of the image forming apparatus main body 12. It is located at the front end of the paper feed unit 18 and also serves as a front panel portion of the paper feed unit main body 20.

  The vertical wall portion 100 is erected substantially vertically from the front end edge of the bottom plate portion 102 in the image forming apparatus main body 12 and is disposed between the bottom plate portion 102 and the opening / closing cover 16. A rectangular opening 104 is formed in which the sheet bundle B is loaded into the image forming apparatus main body 12 and set in the sheet feed tray 22 of the sheet feed unit 18.

  On the outer surface side of the vertical wall portion 100, an opening / closing cover 108 that is rotatable around a hinge portion 106 provided at the lower end portion of the vertical wall portion 100 is provided. When the opening / closing cover 108 is opened, as shown in FIG. 2, the opening 104 is opened so that the sheet bundle B can be loaded into the image forming apparatus main body 12, and when the opening / closing cover 108 is closed, the opening / closing cover 108 is shown in FIG. As described above, the opening 104 is closed and the outer surface (front surface) of the vertical wall portion 100 is covered by the opening / closing cover 108. As shown in FIG. 2, a size display unit 120, which will be described in detail later, is provided at the edge of the opening 104 on the outer surface of the vertical wall portion 100 and at the lower left portion of the front view.

  As shown in FIGS. 4 and 5, the paper feed tray 22 of the paper feed unit 18 has a flat, rectangular, substantially casing shape. In the paper feed tray 22, a placement plate 110 on which the leading end side (the unloading end side) of the stored sheet bundle B is placed in the vicinity of the feed roll 24 on the bottom plate portion 22 </ b> A. The mounting plate 110 is connected to the bottom plate portion 22A of the paper feed tray 22 so that the base end portion far from the feed roll 24 can swing, and is driven by an actuator (not shown) to the swing end side (feed roll 24 side). Moves up and down (in the direction of arrow U / arrow D in FIG. 4), is arranged at the lower position during the non-image forming operation, and moves to the upper position during the image forming operation.

  Thus, when the sheet bundle B is stored in the sheet feeding unit 18, the sheet bundle B is placed on the placing plate 110 disposed on the bottom plate portion 22A and the lower position of the sheet feeding tray 22 to form an image. When the image forming operation is performed by the apparatus 10, the leading end side of the sheet bundle B comes into pressure contact with the feed roll 24 by the rising of the mounting plate 110, and the feed roll 24 rotates at a predetermined timing, whereby the sheet bundle B in the sheet feeding tray 22 is rotated. A sheet of paper is separated from the paper and supplied to the image forming unit.

  Further, on the bottom plate portion 22A of the paper feed tray 22, a pair of guides arranged in the vicinity of the left and right side portions in the width direction (arrow W direction) of the paper feed tray 22 along a direction substantially orthogonal to the width direction. Plates 112R and 112L are provided. The pair of guide plates 112R and 112L can be slid in the direction of arrow W by a slide mechanism (not shown), whereby the pair of guide plates 112R and 112L are placed on the bottom plate portion 22A of the paper feed tray 22. The sheet bundle B is configured to slide substantially along the width direction (see FIG. 5).

  As shown in FIG. 6, the guide plates 112R and 112L are provided with rack portions 114R and 114L that extend in the sliding direction (arrow W direction) and are arranged substantially parallel to each other at a predetermined interval. These rack portions 114R and 114L mesh with a pinion gear 116 that is rotatably provided on the lower surface side of the bottom plate portion 22A of the paper feed tray 22, whereby the pair of guide plates 112R and 112L slide on one side. Then, the other slides in conjunction with each other and approaches and separates from each other.

  In addition, an operation portion 118 for sliding the guide plate 112R is provided at the front end portion of the guide plate 112R. By grasping the operation unit 118 and sliding the guide plate 112R in the direction of the arrow W, the pair of guide plates 112R and 112L are slid in conjunction with each other.

  Further, the size display unit 120 provided at the lower left portion of the vertical wall unit 100 is disposed corresponding to the front end portion of the guide member 112L, and the size display portion is provided at the front end portion of the guide member 112L. A pointer portion 119 pointing to 120 is provided (see FIG. 2).

  The size display unit 120 is provided by sticker or printing, and the size display unit 120 includes a set of guide plates 112R and 112L corresponding to the A4 size, letter size, B5 size, and A5 size. An indication line 122 indicating a position and a size name 124 (“A4”, “Let”, “B5”, “A5”) are described.

  When the paper bundle B is stored in the paper supply unit 18, the guide plates 112R and 112L are set at appropriate positions according to the size of the paper to be stored, and the side of the paper bundle B placed on the bottom plate portion 22A. The side edge position is aligned in contact with the end, and the width direction is positioned. Further, the guide plates 112R and 112L regulate the sheet bundle B, thereby preventing the oblique feeding when the sheets are supplied one by one from the sheet bundle B stored in the sheet feeding unit 18. By sliding the pair of guide plates 112R and 112L to change the position, the paper feeding unit 18 can store and supply a plurality of sizes of paper.

  Next, the operation of the image forming apparatus 10 including the above-described paper feeding unit 18 will be described.

  In the paper feed unit 18 of the present embodiment, the vertical wall portion 100 provided on the front end side of the paper feed tray 22 constitutes the front panel portion of the image forming apparatus main body 12 and the paper feed unit main body 20 and feeds paper from the outside. The unit 18 has an opening 104 for loading the sheet bundle B. Further, the vertical wall portion 100 is visible from the outside and is disposed in a direction substantially along the sliding direction of the guide plates 112R and 112L provided on the bottom plate portion 22A of the paper feed tray 22, Set positions (regulations) of the guide plates 112R and 112L according to the size of the sheet bundle B placed on the bottom plate portion 22A of the paper feed tray 22 at a portion corresponding to the front end portion of the guide plate 112L at the edge portion of the opening 104. A size display unit 120 for displaying (position) is provided. Accordingly, as in the present embodiment, the bottom plate portion 22A of the paper feed tray 22 can be visually recognized from the outside only through the opening 104, so that even the paper feed unit 18 in which the visibility of the bottom plate portion 22A is lowered can be obtained. The user easily visually recognizes the size display portion 120 provided on the vertical wall portion 100 and aligns the pointer portion 119 provided at the front end portion of the guide plate 112L with the instruction line 122 of the size display portion 120. be able to. Therefore, the alignment of the guide plates 112R and 112L can be easily performed.

  In the present embodiment, when the opening 104 of the vertical wall portion 100 is closed by the opening / closing cover 108, the size display portion 120 is covered with the opening / closing cover 108 and is not unnecessarily exposed. Thereby, it is possible to prevent the appearance of the apparatus from being deteriorated by providing the size display unit 120 on the vertical wall 100.

  Further, in the present embodiment, when the user picks the operating portion 118 provided at the front end portion of the guide plate 112R and slides the pair of guide plates 112R and 112L, the front end portion of the guide plate 112L in the vertical wall portion 100 Since the size display unit 120 provided in the corresponding part is not hidden by the operating hand, the visibility of the size display unit 120 is not impaired.

  FIG. 7 shows a modification in the case where the size display section 120 is provided on the vertical wall section 100 of the paper feeding unit 18 (image forming apparatus main body 12) described above.

  As shown in FIG. 7, in the vertical wall portion 100, a portion where the size display portion 120 is provided is an inclined surface 130 that is inclined downward toward the front, and the size display portion 120 is provided on the inclined surface 130. It has been.

  By providing the size display unit 120 on such an inclined surface 130, the visibility of the size display unit 120 that is normally viewed by the user looking down slightly from above is improved.

  As mentioned above, although this invention was demonstrated in detail by specific embodiment mentioned above, this invention is not limited to it, Various other embodiment is possible within the scope of the present invention.

  For example, in the above-described embodiment, the guide plates 112R and 112L provided in the paper feeding unit 18 are both slidable. However, only one guide plate may be slidable and the other may be fixed.

1 is a configuration diagram showing a schematic configuration of an image forming apparatus equipped with a paper feeding unit according to an embodiment of the present invention. FIG. 2 is an external view showing a state in which an opening / closing cover that opens and closes an opening in the image forming apparatus of FIG. 1 is opened. FIG. 2 is an external view showing a state in which an opening / closing cover that opens and closes an opening in the image forming apparatus of FIG. 1 is closed. It is a perspective view which shows the paper feed tray of the paper feed unit which concerns on one Embodiment of this invention. FIG. 5 is a perspective view illustrating a state in which a sheet bundle is placed on the sheet feeding tray illustrated in FIG. 4. FIG. 5 is a plan view showing a pair of guide plates and a pinion gear in the paper feed tray of FIG. 4. FIG. 10 is an external view illustrating a modification in the case where a size display unit is provided on a vertical wall portion of a paper feeding unit in an image forming apparatus. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 12 Image forming apparatus main body 18 Paper feeding unit (paper feeding apparatus)
20 Feeder unit body 22 Feeder tray (tray part)
22A Bottom plate (bottom)
100 Vertical wall 104 Opening 108 Opening / closing cover (cover member)
112R guide plate (guide member / one guide member)
112L guide plate (guide member / other guide member)
118 Operation section 120 Size display section (position display section)
130 Inclined surface B Paper bundle

Claims (5)

A vertical wall portion constituting the outer wall of the housing;
A tray unit disposed in the housing and on which a sheet bundle is placed on the bottom surface;
A sheet is provided on the bottom surface of the tray portion, is movable along the width direction of the sheet bundle placed on the bottom surface, and is disposed at a predetermined position so as to contact the side edge of the sheet bundle. A guide member for regulating the bundle;
An opening that is provided in the vertical wall and through which a sheet bundle loaded into the tray from the outside of the housing passes;
A sheet bundle provided near the edge of the opening and corresponding to the end of the guide member so as to be visible from the outside of the casing and placed on the bottom surface of the tray A position display unit for displaying the restriction position of the guide member according to the size of
A sheet feeding device comprising: The sheet feeding device according to claim 1, further comprising a cover member that covers the position display unit in a state where the opening is opened and closed and the opening is closed. The guide member regulates both side ends of the sheet bundle placed on the bottom surface of the tray portion, and is paired with a first guide member and a second guide member that can be interlocked so as to approach and separate from each other in the movement. An operating portion for moving and operating the first guide member and the second guide member is provided in the first guide member or the second guide member, and the position display portion is provided in the second guide member or the The sheet feeding device according to claim 1, wherein the sheet feeding device is provided at a portion corresponding to an end portion of the first guide member. The sheet feeding device according to any one of claims 1 to 3, wherein a portion where the position display unit is provided is an inclined surface inclined downward toward the outside of the housing. . An image forming apparatus comprising: the paper feeding device according to claim 1; and an image forming unit.

Images