JP2007145585A - Paper feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simply formed and easily operable paper feeder by preventing paper from being suspended even if a hole for passing through side fences guiding the lateral side faces of paper is formed in a paper feed stand in a paper feeder in which a paper bundle is loaded on the liftable paper stand and paper is taken out one by one from the highest position of the bundle while raising the paper feed stand according to the remaining amount of the paper. <P>SOLUTION: This paper feeder comprises an auxiliary plate installed in contact with the side fences, closing the portion of an opening along the side fences and capable of supporting the paper bundle. The auxiliary plate is moved together with the side fences and the paper feed stand while always coming into contact with the paper guide surface sides of the side fences according to the lateral movement of the side fences and the vertical movement of the paper feed stand. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention has a sheet feeding table that can be moved up and down to load a stack of sheets, and the uppermost sheet is separated and fed while keeping the uppermost sheet bundle at a predetermined height by raising the sheet feeding table. The present invention relates to a sheet feeding device.

  Paper feeding devices that separate and feed paper sheets one by one from paper bundles are used in various mechanical devices such as printing machines, copiers, facsimiles, paper folding machines, collating machines, etc. Along with the increase in speed, a paper feeding device that can load a large amount of paper is often used. In such a sheet feeding device, as shown in FIG. 14, the sheet bundle P0 is stacked on the sheet feed table 101, and the sheet feed table 101 is raised in accordance with the decrease in the sheet P, so that the uppermost surface of the sheet bundle P0 is placed. In many cases, sheets are taken out one by one from the top of the sheet bundle P0 while maintaining a constant height.

  As the paper take-out method, the roller is pressed against the uppermost paper to feed out the paper, and the paper plate that presses against this roller prevents the subsequent paper from being sent out at the same time. There are a friction paper feeding method for taking out, a suction paper feeding method for picking up and taking out only one uppermost sheet with air, and the like. In either case, in order to prevent oblique feeding of the paper by the paper feed roller and displacement of the paper after the next by air, on both side edges in the direction (width direction) perpendicular to the paper feeding direction of the paper bundle P0, A pair of side fences 102 must be brought into contact with each other to guide the paper (see, for example, FIG. 2 of Patent Document 1).

In the sheet feeding device of FIG. 14, an opening 101a is formed in the sheet feeding table 101, and the side fence 102 is erected on a bottom plate provided below the sheet feeding table 101, and is configured to pass through the opening 101a. ing. In this way, it is possible to always guide the side edge of the sheet bundle P0 regardless of the remaining amount of sheets, and to prevent the apparatus from becoming large (if the side fence is not provided without the opening 101a). If it is placed on the paper feed stand, the upper end of the side fence rises as the paper feed stand rises, so that the space for the space above the paper feed stand is required, resulting in an increase in size of the apparatus).
JP-A-2-231318 (FIG. 2)

  However, if the side fence 102 can be moved in the width direction in order to be able to feed various sheets having different widths, the opening 101a needs an area that covers the moving range. Therefore, in order to be able to deal with a wide range of sizes from a small width paper to a large size paper, the opening 101a must also be enlarged in the width direction. Further, in order to perform stable paper feeding without deviation or oblique feeding, it is desired to make the contact area of the side fence as long as possible. However, in that case, the size of the opening 101a in the paper feeding direction also increases. As a result, there is a problem in that the area of the opening 101a is too large and the lower surface of the sheet bundle P0 hangs down from the opening, causing the sheet to bend and cause a feeding failure or bend the sheet.

  Therefore, conventionally, there has been used an auxiliary plate that blocks at least a part of the opening and forms a surface having the same height as the sheet stacking surface of the sheet feeding plate 101 in the blocked portion. However, if the auxiliary plate is formed to have a large width direction dimension, the auxiliary plate must be removed when processing a sheet having a small width.

  Also, if the auxiliary plate is small in the width direction, it may not be possible to sufficiently support the paper depending on the position of the auxiliary plate when processing large paper. There is a problem that it has to be done and takes time and effort.

  The present invention has been made in view of such a problem. In a paper feeding apparatus provided with an opening that penetrates the side fence, and provided with an auxiliary plate that covers at least a part of the opening, the auxiliary plate includes: An object of the present invention is to provide a sheet feeding device with good operability that can sufficiently support the lower surface of sheets of various widths and prevent sagging without repositioning or detaching.

  In order to solve the above-described problem, the paper feeding device of the present invention has the following configuration.

  The first configuration includes a sheet feed table that can be moved up and down to stack a sheet bundle, and a side fence that abuts and guides both side edges in the width direction of the sheet bundle so that the sheet bundle loaded on the sheet feed base does not shift. In the sheet feeding device having separation feeding means for separating and feeding the uppermost sheet while keeping the uppermost sheet bundle at a predetermined height by raising the sheet feeding table, the side fence is formed by feeding the sheet The opening that is provided so as to penetrate the opening provided in the base and is movable in the width direction according to the width of the paper, and on the side of the paper guide surface of the side fence, the opening through which the side fence passes. An auxiliary plate capable of supporting the sheet bundle in the blocked portion and covering the portion along the side fence, and when the side fence moves in the width direction, the auxiliary plate is used as a paper guide for the side fence. surface When the sheet feed table moves in the width direction while being in contact with the side fence, and the sheet feed table is moved up and down, the front and rear ends of the auxiliary plate are moved up and down with the sheet feed table while being in contact with the front and rear edges of the opening. This is a sheet feeding device.

  The second configuration is a paper feeding device characterized in that the auxiliary plate and the side fence in the first configuration are magnetized.

  In the third configuration, extending portions extending beyond the front edge and the rear edge of the opening are formed at the front and rear ends of the auxiliary plate in the first or second configuration, and the front edge of the opening In addition, the rear edge is provided with an auxiliary plate support portion that supports the extension portion from below and holds the extension portion so that the auxiliary plate is not detached upward from the paper feed table. This is a sheet feeding device.

  In the fourth configuration, the front and rear edges of the opening in the first or second configuration are provided with lower support portions that support the front and rear ends of the auxiliary plate from below, and the auxiliary plate and the The sheet feeding device is characterized in that the lower support portion is magnetized.

  In the fifth configuration, linear guide means is formed in the vertical direction on the side fence in the first configuration, and the auxiliary plate is guided by the linear guide means and is not separated from the side fence. A sheet feeding device including a guided member to be stopped.

  In the sixth configuration, the linear guide means in the fifth configuration is a long hole provided in the vertical direction in the side fence, and the guided member passes through the long hole, and the paper guide surface of the side fence The sheet feeding device is characterized by having a flange portion that is wider than the width of the long hole on the opposite surface.

  In the seventh configuration, the front and rear edges of the opening in the fifth or sixth configuration are provided with lower support portions that support the front and rear ends of the auxiliary plate from below. It is a paper device.

  In order to prevent the sheet bundle lower surface from sagging at the opening, it is effective to support the vicinity of the edge in the width direction of the sheet bundle lower surface with an auxiliary plate. According to the first configuration of the present invention, when the side fence moves in the width direction, the auxiliary plate also moves in the width direction while being in contact with the side fence, and when the paper feed table is raised and lowered, the auxiliary plate also moves together with the paper feed table. Go up and down. Therefore, even if the side fence is moved or the paper feed table is moved up and down, the auxiliary plate is always in contact with the side fence without being detached from the paper feed table. The vicinity of the edge is supported by the auxiliary plate. Accordingly, it is possible to prevent the sheet bundle from drooping from the opening without removing, replacing, or reworking the auxiliary plate.

  According to the second configuration of the present invention, the auxiliary plate and the side fence can be magnetically attached, so that the auxiliary plate can always be in contact with the side fence with a simple configuration. If the third and fourth configurations are combined with this, the auxiliary plate is locked or magnetically attached so as not to be detached upward from the paper feed table, so that the paper feed table is lowered while no sheets are loaded. However, the auxiliary plate is not left at the original height position due to the magnetic attachment with the side fence, and the magnetic attachment surface with the side fence descends together with the paper feed base while frictionally sliding.

  Further, in the fifth and sixth configurations of the present invention, linear guide means is formed in the vertical direction on the side fence, and the guided member guided by the linear guide means is provided on the auxiliary plate. Always in contact with the fence. Therefore, even if the side fence is moved in the width direction, the auxiliary plate always moves with the side fence while being in contact with the side fence. If the seventh configuration is combined with this, the front and rear ends of the auxiliary plate are supported by the front and rear edges of the opening, so that when the paper feed table moves up and down, the auxiliary plate also moves up and down together with the paper feed table. Can be.

  With the above configuration, the present invention has an effect that a large-capacity sheet can be stacked, a sheet feeding defect is few, a structure is simple, and a operability is good.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a left side view of FIG. As shown in FIG. 1, the paper feeding device 1 includes a paper feed tray 2 on which a stack of paper is stacked, and a side fence 3 that abuts against both side edges of the paper in the width direction to position the paper. In FIG. 2, the side fence 3 on the front side of the drawing is omitted for easy understanding of the configuration.

  The sheet bundle P0 is stacked on the sheet feed stand 2, and the sheet guide surfaces 3a of the side fences 3 are brought into contact with the side edges of the sheet bundle P2, and the sheets are taken out one by one from the top of the bundle. The arrow E shown in FIG. Feed in the direction of.

  As shown in FIGS. 2 and 3, a block 51 and a fixing plate 52 are fixedly provided above the side fence 3. A guide shaft 53 that is horizontally provided with the width direction as an axial direction passes through the block 51, and the block 51 is guided by the guide shaft 53, so that it can move in the axial direction of the guide shaft 53. Yes. A pair of frames 41 are provided upright on the bottom plate 69 on both sides in the width direction of the guide shaft 53, and both ends of the guide shaft 53 are fixed to the frame 41. In FIG. 2, the frame 41 on the near side of the drawing is omitted for easy understanding of the configuration.

  A rotating shaft 42 is provided on both outer sides in the width direction of the frame 41, and a toothed pulley 43 is provided near the upper end of the rotating shaft 42. A toothed belt 54 is placed between the pair of toothed pulleys 43, and is fixed to one of the pair of side fences 3 at a portion of the toothed belt 54 that runs on the front side in FIG. The fixed plate 52 fixed to the other of the pair of side fences 3 is fixed to a portion of the toothed belt 54 that travels on the back side in FIG. 3.

  Similarly, a block 61 and a fixing plate 62 are fixed below the side fence 3, a guide shaft 63 penetrates the block 61, and the block 61 is guided by the guide shaft 63 and can move. A toothed pulley 44 is provided near the lower end of the rotating shaft 42, and a toothed belt 64 is hung between the pair of toothed pulleys 44. A fixed plate 62 fixed to one of the pair of side fences 3 is fixed to a portion of the toothed belt 64 that travels on the front side in FIG. 3, and further travels on the inner side of the toothed belt 64 in FIG. 3. A fixed plate 62 fixed to the other of the pair of side fences 3 is fixed to the portion to be fixed.

  A knob 45 is provided at the upper end of one of the pair of rotating shafts 42. When the knob 45 is turned by hand, the toothed belts 54 and 64 are rotated by the rotation of the rotation shaft 42. Therefore, the side fences 3 are centered with respect to each other in the width direction via the fixing plates 52 and 62. It is designed to move symmetrically. By turning the knob 45, the side fence 3 is moved in accordance with the size in the width direction of the sheet bundle P0 and brought into contact with the side end surface of the sheet bundle P0.

  A separation feeding unit 70 that separates and feeds the uppermost sheet of the sheet bundle P0 is provided at the front upper side of the sheet feeding table 2. The separation feeding unit 70 communicates with the belt 71 that circulates in the upper front of the sheet bundle P0, the suction chamber 72 provided inside the belt, and the suction chamber 72, and forms a negative pressure in the suction chamber 72. A fan 73 is provided. A plurality of belts 71 are provided in parallel in the width direction, and an opening is formed in the lower surface of the suction chamber 72 so that air is sucked from between the belts. Further, a discharge chamber 74 is provided in front of the sheet bundle P0, and a blowout port 75 for blowing air toward the upper front end of the sheet bundle P0 is formed. In communication with the discharge chamber 74, a fan (not shown) for sending air into the discharge chamber 74 is provided. The air blown out from the blowout port 75 is blown between the sheets above the sheet bundle P0 and the sheets are separated from each other, and the uppermost one of them is sucked by the belt 71, and the belt 71 circulates. 2 is conveyed in the right direction.

  A sensor S1 is provided above the sheet bundle P0. This sensor S1 can detect the height of the top surface of the sheet bundle P0. In accordance with the detection result of the sensor S1, the sheet feed table 2 moves up and down by a drive mechanism (not shown). When the removal of the paper advances and the height of the uppermost surface becomes lower, the sensor S1 detects that the height of the uppermost surface of the sheet bundle has become lower than a predetermined height. Then, in response to this detection, the paper feed base is raised. As a result, when the uppermost surface of the sheet bundle P0 reaches a predetermined height, the sensor S1 detects that the predetermined height is reached, and the paper feed base 2 The rise of will also stop. By this control, the uppermost surface of the sheet bundle P0 is always kept at the height most suitable for paper feeding.

  As shown in FIG. 1, the side fence 3 is provided through two openings 2 a provided in the paper feed tray 2, and a portion of the opening 2 a close to the side fence 3 is blocked by the auxiliary plate 4. The auxiliary plate 4 is magnetically attached to the paper guide surface 3 a of the side fence 3 by the magnet 5. The auxiliary plate 4 forms a plane substantially the same as the paper stacking surface of the paper feed table so as to support the sheet bundle. The auxiliary plate 4 supports the vicinity of both side edges of the paper, so that the paper Therefore, it is possible to prevent the paper from sagging and undulating, thereby preventing a paper feed failure caused by this.

  4 is a plan view of the paper feed tray 2, FIG. 5 is a cross-sectional view taken along line AA shown in FIG. 4, and FIG. 6 is a cross-sectional view taken along line BB shown in FIG. As shown in FIG. 4, the auxiliary plate 4 is formed with a front extension 4a at the front (downstream side) in the paper feed direction and a rear extension 4b at the rear (upstream side) in the paper feed direction. Extends beyond the front edge 2b and the rear edge 2c. As shown in FIG. 5, the front edge 2b of the opening 2a is formed by bending a plate that forms the upper surface of the sheet feed table 2 downward, and a slit 2d is formed at the bent portion. As shown in FIG. 6, the slit 2d is formed over substantially the entire width direction of the opening 2a. The front extension 4a of the auxiliary plate 4 is inserted through the slit 2d. Similarly, the rear edge 2c of the opening 2a is also formed by bending a plate forming the upper surface of the paper feed base 2 downward, and a slit 2e is formed at the bent portion. The shape of the slit 2e is the same as that of the slit 2d, and the rear extension 4b of the auxiliary plate 4 is inserted through the slit 2e.

  Accordingly, the auxiliary plate 4 has a front extension portion 4a and a rear extension portion 4b supported from below on the lower sides of the slits 2d and 2e, and the auxiliary plate 4 is supported by the upper sides of the slits 2d and 2e. It is latched so that it may not detach upward. That is, the slits 2d and 2e function as auxiliary plate support portions.

  According to this configuration, the auxiliary plate 4 is magnetically attached to the paper guide surface 3 a by the magnet 5, and the slits 2 d and 2 e are provided over almost the entire dimension in the width direction of the opening 2. When moved in the width direction, the auxiliary plate 4 moves in the width direction together with the side fence 3 while being magnetically attached to the sheet guide surface 3a.

  Further, when the paper feed table 2 moves in the vertical direction, the auxiliary plate 4 is supported by the lower side of the slit, so that when the paper feed table 2 is raised, the auxiliary plate 4 is also lifted and the paper is fed. When the feeding is completed and there is no paper on the paper feed tray 2 and the paper feed tray 2 is lowered in order to be able to supply new paper, the auxiliary plate 4 is locked to the upper side of the extension slit, It descends together with the paper feed table 2 without leaving the paper feed table 2. At this time, while the auxiliary plate 4 is magnetically attached to the paper guide surface 3a, the magnetically attached surface slides frictionally.

  Therefore, the auxiliary plate 4 always exists in the portion along the side fence 3 of the opening 2 to support the sheet bundle regardless of which of the side fence 3 and the paper feed table 2 moves, so that the position of the auxiliary plate 4 is adjusted. Therefore, even if the sheets are stacked as they are, the lower end of the sheets does not hang down from the opening 2, so that a good stacking state can be maintained and a paper feeding problem is eliminated.

  Of the side fence 3, at least the paper guide surface 3a is formed of a magnetic material, and the magnet 5 is attached to the auxiliary plate 4 with an adhesive tape, glue, or the like. Alternatively, the auxiliary plate 4 may be formed of a magnetic material, and the magnet may be attached to the paper guide surface 3a. However, in this case, the magnet is moved over the entire moving range of the auxiliary plate 4 by the vertical movement of the paper feed table 2. It is necessary to paste.

(Second Embodiment)
Next, a paper feeding device according to the second embodiment of the present invention will be described. FIG. 7 is a plan view showing a paper feed table 82 of the paper feed device according to the second embodiment of the present invention, and FIG. 8 is a cross-sectional view taken along the line CC in FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 7 and 8, in the paper feeding device of the second embodiment, an opening 82a through which the side fence 3 passes is provided, and a lower support portion is provided at the front edge and the rear edge of the opening 82a. 82b and 82c are provided. The lower support portions 82b and 82c support the front end portion and the rear end portion of the auxiliary plate 84 from below, and the auxiliary plate is supported by a magnet 86 interposed between the auxiliary plate 84 and the lower support portions 82b and 82c. 84 and the lower support portions 82b and 82c are magnetized. The other configuration is the same as that of the first embodiment.

  With this configuration, when the paper feed base 82 moves in the vertical direction, the auxiliary plate 84 is supported by the lower support portions 82b and 82c. Even after the feeding is completed and there is no paper on the paper feed tray 82 and new paper can be replenished, the auxiliary plate 84 and the lower support portions 82b and 82c are magnetically attached even if the paper feed tray 82 is lowered. Therefore, the auxiliary plate 84 is lowered together with the paper feed table 2 without detaching from the paper feed table 82. At this time, the auxiliary plate 84 is frictionally slid on the magnetized surface while the magnet 5 is magnetized on the paper guide surface 3a.

  When the side fence 3 is moved in the width direction, the auxiliary plate 84 is magnetically attached to the paper guide surface 3a by the magnet 5, so that the auxiliary plate 84 has a width together with the side fence 3 while being magnetically attached to the paper guide surface 3a. Move in the direction. At this time, while the auxiliary plate 84 is magnetically attached to the lower support portions 82b and 82c by the magnet 86, the magnetically attached surfaces thereof frictionally slide.

  Therefore, in the second embodiment, as in the first embodiment, it is not necessary to reposition the auxiliary plate 84 regardless of which of the side fence 3 and the paper feed table 82 moves, and a good loading state is achieved. A sheet feeding device that can be maintained and free of sheet feeding defects can be obtained, and a simpler structure can be achieved as compared with the combination structure of the slit and the extending portion of the first embodiment.

  The lower support portions 82b and 82c are made of a magnetic material, and the magnet 86 is attached to the auxiliary plate 84 with an adhesive tape, glue, or the like. Or as this modification, the auxiliary | assistant board 84 may be formed with a magnetic body and a magnet may be stuck to the lower support parts 82b and 82c. In this case, as shown in FIG. 9, the magnet 88 is pasted over the entire moving range of the auxiliary plate 86.

(Third embodiment)
Subsequently, a sheet feeding device according to a third embodiment of the present invention will be described. FIG. 10 is a front view showing a paper feeding device according to the third embodiment. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 10, in the paper feeder of the third embodiment, at least one paper guide surface 93 a of the side fence 93 is provided with a long hole 93 b in the vertical direction. FIG. 11 is a plan view showing a paper feed tray 92 of the paper feed apparatus according to the third embodiment, and FIG. 12 is a cross-sectional view taken along the line DD in FIG. As shown in FIGS. 11 and 12, a guided member 97 (guided means) is provided on the auxiliary fence 94 on the side fence 93 side. The guided member 97 passes through the long hole 93a of the side fence 93 and extends to the outside of the side fence 93. The extended portion has a flange portion 97a having a width wider than that of other portions. The width dimension of the flange portion 97a is larger than the width dimension of the elongated hole 93b.

  Further, the paper feed tray 92 is provided with an opening 92a through which the side fence 93 passes, and lower support portions 92b and 92c are provided at the front edge and the rear edge of the opening 92a. The lower support portions 92b and 92c support the front end portion and the rear end portion of the auxiliary plate 94 from below. The other configuration is the same as that of the first embodiment.

  With this configuration, when the paper feed tray 92 moves in the vertical direction, the auxiliary plate 94 is supported by the lower support portions 92b and 92c. Therefore, when the paper feed stand 92 is raised, the auxiliary plate 94 is also moved to the lower support portions 92b and 92c. The auxiliary plate 94 is pushed up and lifted together, and even when the paper feed is completed and there is no paper on the paper feed tray 92 and the paper feed tray 92 is lowered so that a new paper can be supplied. Since the front and rear ends thereof are lowered by their own weight while being placed on the lower support portions 92b and 92c, they are not detached from the paper feed table 92. At this time, the guided member 97 fixed to the auxiliary plate 94 moves up and down while being guided by the long hole 93 b of the side fence 93. Therefore, the long hole 93b functions as a linear guide means.

  Further, when the side fence 93 is moved in the width direction, the auxiliary plate 94 is locked so as not to be detached from the side fence 93 by the flange portion 97a of the guided member 97. Therefore, the auxiliary plate 94 is detached from the side fence 93. Without moving, both move in the width direction.

  Therefore, in this third embodiment, as in the first and second embodiments, the auxiliary plate 94 is always in contact with the side fence 93 regardless of which side fence 93 or paper feed base 92 moves. Since the sheet bundle is supported, there is no need to correct the position of the auxiliary plate 94, a good stacking state can be maintained, and a sheet feeding device free from sheet feeding problems can be obtained.

  FIG. 13 shows a modification of the third embodiment. In this modification, a groove 93c is formed as a linear guide means in the side fence 93x, and the guided member 97 is fitted in the groove 93c. The groove 93c is formed on the side of the paper guide surface of the side fence 93, and is formed in a narrow portion 93d having a narrow groove width near the paper guide surface and in a portion deeper than the narrow portion 93d, and a wide portion having a wide groove width. 93e is formed. The flange portion 97a of the guided member 97 is fitted in the wide portion 93e.

  With this configuration, when the side fence 93x is moved in the width direction, the auxiliary plate 94 is locked by the flange portion 97a of the guided member 97 so as not to be detached from the side fence 93x. Both move in the width direction without leaving. As described above, the linear guide means and the guided means may be configured in any shape as long as the auxiliary plate is not detached from the side fence.

1 is a perspective view showing a first embodiment of the present invention. It is a front view which shows 1st Embodiment of this invention. It is a left view which shows 1st Embodiment of this invention. It is a top view of the paper feed stand 2 in a 1st embodiment of the present invention. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is a top view of the paper feed stand 82 in 2nd Embodiment of this invention. It is CC sectional drawing in FIG. It is a figure which shows the modification of 2nd Embodiment of this invention. It is a front view which shows 3rd Embodiment of this invention. It is a top view of the paper feed stand 92 in 3rd Embodiment of this invention. It is DD sectional drawing in FIG. It is a figure which shows the modification of 3rd Embodiment of this invention. It is a figure which shows the paper feeder of background art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; Paper feeder 2, 82, 92; Paper feed stand 2a, 82a; Opening 2b; Front edge 2c; Rear edge 2d, 2e; Slit 3, 83, 93, 93x; Side fence 3a, 93a; 84, 94; auxiliary plate 4a; forward extension 4b; rear extension 5, 86, 88; magnet 41; frame 45; knobs 54, 64; toothed belt 70; separation feeding means 82b, 82c, 92b , 92c; downward support part 93b; slot 93c; groove 93d; constriction part 93e; wide part 97; guided member 97a; flange part 101; paper feed table 101a; opening 102; side fence P; paper P0; Sensor

Claims (7)

A paper feed table that can be moved up and down to load a stack of paper, a side fence that abuts and guides both side edges of the paper bundle in the width direction so that the paper stack loaded on the paper feed base does not shift, and a lift of the paper feed table In the sheet feeding device having separation feeding means for separating and feeding the top sheet while maintaining the top of the sheet bundle at a predetermined height,
The side fence is provided so as to penetrate an opening provided in the paper feed table, and is movable in the width direction according to the width of the paper,
On the paper guide surface side of the side fence, there is provided an auxiliary plate capable of blocking a portion along the side fence of the opening through which the side fence passes and supporting the sheet bundle in the blocked portion. ,
When the side fence moves in the width direction, the auxiliary plate moves in the width direction together with the side fence while being in contact with the paper guide surface side of the side fence,
When the sheet feeding table is moved up and down, the sheet feeding device is moved up and down together with the sheet feeding table while the front and rear ends of the auxiliary plate are in contact with the front and rear edges of the opening.   The sheet feeding device according to claim 1, wherein the auxiliary plate and the side fence are magnetized.   Extending portions extending beyond the front and rear edges of the opening are formed at the front and rear ends of the auxiliary plate, and the extending portions are formed on the front and rear edges of the opening from below. 3. The paper feeding device according to claim 1, further comprising an auxiliary plate support portion that supports the auxiliary plate so as to prevent the auxiliary plate from being detached upward from the paper feed table.   A lower support portion for supporting the front and rear ends of the auxiliary plate from below is provided at the front edge and the rear edge of the opening portion, and the auxiliary plate and the lower support portion are magnetically attached. The sheet feeding device according to claim 1 or 2.   The side fence is formed with linear guide means in the vertical direction, and the auxiliary plate is provided with a guided member that is guided by the linear guide means and is locked so as not to be detached from the side fence. The paper feeding device according to claim 1.   The linear guide means is a long hole provided in the vertical direction in the side fence, and the guided member penetrates the long hole, and the long hole is formed on the surface opposite to the paper guide surface of the side fence. 6. The paper feeding device according to claim 5, further comprising a flange portion wider than the width of the paper feeding portion.   The sheet feeding device according to claim 5 or 6, wherein a lower support portion for supporting front and rear ends of the auxiliary plate from below is provided at a front edge and a rear edge of the opening.

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