JP2005263458A - Sheet feeding apparatus and image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet feeding device, in which skew correction can be easily performed. <P>SOLUTION: This sheet feeding device comprises a sheet stacking part 4 on which sheets 3 are stacked, and a feed roller 14 to carry the sheets 3 stacked on the sheet stacking part 4 to a copying machine 1. It is also provided with a pair of regulating plates 5 to regulate the sheets 3 stacked on the sheet stacking part 4 in their width direction. The regulating plates 5 have an angle adjusting means to adjust the angle of the sheets 3 to their carrying direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sheet feeding apparatus that feeds a sheet to an image forming apparatus such as a copying machine, a printer, or a multifunction machine.

  The related background art will be described with reference to FIGS.

  34 and 35 are examples of the sheet feeding apparatus, FIG. 34 is a schematic configuration top view, and FIG. 35 is a schematic configuration side view.

  A sheet feeding device 38 serving as a manual sheet feeding mechanism provided on the side of the copying machine main body includes a sheet stacking unit 4 serving as a sheet stacking unit that stacks sheets 3 serving as recording materials for supply to the copying machine, A pair of regulating plates (regulations) that are provided on the stacking unit 4 so as to be able to move the sheet 3 in a direction (sheet width direction) orthogonal to the conveyance (sheet feeding) direction and regulate the position of the sheet 3 in the width direction. Member) 39 and a paper feed roller 14 for feeding out the sheets 3 stacked on the sheet stacking unit 4.

  Then, the supply of the sheet 3 from the sheet feeding device 38 to the copying machine 1 is performed as follows.

  (1) Sheets 3 are stacked on the sheet stacking unit 4.

  (2) The right and left positions of the sheet 3 are restricted by moving the restriction plate 39 so that the distance between the pair of restriction plates 39 substantially matches the width dimension of the sheets 3 stacked on the sheet stacking unit 4. .

  (3) The sheet 3 is fed out to the copying machine 1 by a paper feed roller (conveying means) 14.

  Incidentally, as shown in FIG. 36, the difference between the leading left margin and the right margin of the image 50 with respect to the sheet 3 is referred to as left / right printing position accuracy, and the difference between the leading left margin and the trailing left margin of the image 50 is referred to as skew. . The left and right print position accuracy is the left and right positional relationship between the image developed on the surface of the photosensitive drum 40 and the sheet, and the position in the width direction of the sheet when the sheet is fed from the sheet feeding device is greatly affected. Further, the skew occurs when the sheet enters the photosensitive drum 40 obliquely.

In the regulation of the sheet by the conventional regulation plate 39, the left and right printing position accuracy can be suppressed to within a range of ± 1.5 mm.

  Further, the skew correction of the sheet is corrected by forming a loop on the sheet by abutting the leading edge of the sheet 3 against a registration roller 42 disposed upstream of the photosensitive drum 40 and provided in parallel with the photosensitive drum 40. can do.

However, since the assembling accuracy of the apparatus varies, the angle of the registration unit 43 including the registration roller 42 with respect to the photosensitive drum 40 is adjusted as a correction device according to the skew of the sheet fed from the sheet feeding apparatus. Some are provided with an angle adjustment mechanism 41 (see Patent Document 1).
Japanese Patent Application Laid-Open No. 06-183607

  However, in a copying machine that does not have an angle adjustment mechanism, when a large skew occurs in the sheet due to component accuracy or assembly accuracy, the skew correction may not be sufficiently performed by simply forming a loop on the sheet using the registration rollers. there were.

  Even in a copier equipped with an angle adjusting mechanism, in the case of a copier equipped with a plurality of sheet feeding devices, the angle of the registration roller relative to the photosensitive drum by the angle adjusting mechanism is adjusted for all sheets. It is not performed for the feeding device, but is generally performed for a sheet feeding device related to a frequently used size sheet. For this reason, when the paper is fed manually or for a sheet feeding device that feeds a sheet of an infrequently used size that is attached as an option, the skew correction cannot be sufficiently performed because the entrance angle is not adjusted. It was.

  Further, even in a copying machine provided with an angle adjustment mechanism, the service angle is adjusted by the service person, so that the user cannot easily perform correction even if the skew correction is desired.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a sheet feeding apparatus including a mechanism that can easily perform skew feeding correction.

  The sheet feeding apparatus according to the present invention includes a sheet stacking unit that stacks sheets, a sheet transport unit that transports sheets stacked on the sheet stacking unit, and a sheet stacked on the sheet stacking unit in the width direction. It has a regulating member for regulating, and an angle adjusting means for adjusting an angle of the regulating member with respect to the sheet conveying direction.

  According to the sheet feeding apparatus of the present invention, the left and right printing accuracy and skew feeding accuracy can be improved, and desired printing accuracy can be realized.

  Embodiments of a sheet feeding apparatus according to the present invention will be described below with reference to the drawings.

  A sheet feeding apparatus 201 according to the first embodiment will be described with reference to FIGS.

  As shown in FIG. 1, a sheet feeding apparatus 201 installed in the copying machine 1 includes a pair of hollow box-shaped sheet stacking units (sheet stacking means) 4 for stacking sheets 3 and a sheet 3 for regulating the sheets 3 in the width direction. And a regulating plate (regulating member) 5. The sheet 3 is conveyed in the direction of arrow A in FIG. As can be seen from FIG. 2, a rail 6 is bridged on the back surface of the sheet stacking unit 4 in a direction orthogonal to the conveyance direction of the sheet 3 (transverse direction: a direction indicated by an arrow A in FIG. 2). . The rail 6 is supported by a rail stay 8, and the rail stay 8 is fixed to the side surface of the sheet stacking unit 4 by screws 9 and other fixing means. The restriction plate 5 is movably supported on the rail 6, and the restriction plate 5 is fixed at an arbitrary position on the rail 6 by tightening the restriction plate fixing screw 7. In other words, the restriction plates 5 and 5 can be attached to the sheet feeding apparatus 201.

  As shown in FIG. 3, each of the restriction plates 5 connects the upper restriction plate 10, a plate-like lower restriction plate 11 on which the upper restriction plate 10 is placed, and the upper restriction plate 10 and the lower restriction plate 11. The connecting pin 12 to be fixed, a fixing screw 13 for fixing the upper restricting plate 10 at a desired location, and a restricting plate fixing screw 7 for fixing the restricting plate 5 are configured.

  The upper restriction plate 10 has an L-shaped cross section and is opposed to the upper restriction plate 10 of the other restriction plate 5. And the surface which opposes the upper control board 10 of the other control board 5 among the upper control boards 10 is shown with the code | symbol 10c, and this is called a control surface. Since the surface orthogonal to the restriction surface 10c is a portion placed on the lower restriction plate 11 with respect to the restriction surface 10c, it is referred to as a placement surface and is denoted by reference numeral 10d. Further, the mounting surface 10d has a hole portion 10a into which the connecting pin 12 is fitted in a loosely fitted state and protrudes, and an arc hole 10b having the hole portion 10a as the center of curvature.

  When the upper restricting plate 10 is connected to the lower restricting plate 11 by fitting the connecting pin 12 into the hole portion 10a, the upper restricting plate 10 rotates with respect to the lower restricting plate 11 with the connecting pin 12 as a rotation center. The rotation angle is regulated by the arc hole 10b and the fixing screw 13 that passes through the arc hole 10b and engages with the screw hole 13a of the lower regulating plate 11, and moves only within the range of the arc hole 10b (see FIG. 4 arrow B). When the rotational position is determined, the fixing screw 13 is tightened to fix the upper restriction plate 10 to the lower restriction plate 11.

  Since the sheet feeding apparatus 201 has such a configuration, the sheet 3 is placed between the regulation plates 5 of the sheet stacking unit 4, and the regulation surface 10c of the upper regulation plate 10 and the side end surface 3a of the sheet 3 (see FIG. 5). ) Are brought close to each other so that the gap between them becomes 0 (zero). If the lower restriction plate 11 is fixed to the sheet stacking portion 4 with the restriction plate fixing screw 7 in a state where the gap is zero, the sheet 3 is moved in the conveying direction when the sheet 3 is placed on the sheet stacking portion 4. Even if it is not straight, the upper restricting plate 10 is rotated with respect to the lower restricting plate 11 to adjust the skew so that it becomes 0. After the adjustment, the restricting plate 5 is seated with the fixing screw 13. By fixing to the stacking unit 4, the sheet 3 can be fed with high accuracy by the sheet feeding roller 14. The fed sheet 3 is sent to an image forming means comprising a photosensitive drum 40 (shown in FIG. 5) or the like via a registration roller 42 (shown in FIG. 5) of the copying machine 1 in the same manner as in the prior art. It is formed.

  Further, since the orientation of the sheet 3 can be adjusted to a suitable angle with respect to the conveying direction by the rotation of the upper restricting plate 10 with respect to the lower restricting plate 11, it is possible to expect improvement in left and right printing position accuracy and skew feeding accuracy.

  In the copying machine 1 having such a sheet feeding device 201, it is easy to correct the right / left printing position accuracy and the skew feeding accuracy. Therefore, not only the service engineer but also the user can easily adjust the left and right printing position accuracy and the skew feeding accuracy while looking at the output sample. In addition, the user can adjust the accuracy desired by the user.

  The upper restricting plate 10 is rotated with respect to the lower restricting plate 11 through a connecting pin 12 serving as a rotation center, an arc hole 10b for restricting the rotation range of the upper restricting plate 10, and the arc hole 10b. It is determined by the fixing screw 13 that is screwed into the screw hole 13a of the lower regulating plate 11. Then, since the angle of the sheet 3 with respect to the conveyance direction of the sheet 3 is adjusted according to the degree of rotation, the connecting pin 12, the arc hole 10b, the screw hole 13a, and the fixing screw 13 are connected to the conveyance direction of the sheet. This is referred to as an angle adjusting means of the present invention for adjusting the angle of the sheet.

  A sheet feeding apparatus 202 according to the second embodiment will be described with reference to FIGS. The difference between the sheet feeding apparatus 202 and the sheet feeding apparatus 201 according to the first embodiment is that the sheet feeding apparatus 201 rotates the pair of regulation plates 5 and 5 with respect to the sheet stacking unit 4. However, in the sheet feeding apparatus 202, the regulating plates 5 and 5 are simultaneously rotated.

For this reason, in the second embodiment, the regulating plates 5 and 5 are not directly placed on the sheet stacking unit 4, but both the regulating plates 5 are installed on the disk unit 17 that is rotatable with respect to the sheet stacking unit 4. did. In this relationship, the sheet stacking unit 4 is provided with a region on which the disk unit 17 is placed, and it is not necessary to rotate the regulation plates 5 and 5 itself. Therefore, the connecting pin 12 described in the first embodiment is used. The fixing screw 13 and the hole 10a, the arc hole 10b, and the screw hole 13a related thereto are not the second embodiment. In addition, the same code | symbol is attached | subjected to the substantially same part as Example 1, and description is abbreviate | omitted.

  FIG. 6 is a top view of the sheet feeding apparatus 202 corresponding to FIG. 1 of the first embodiment.

  7 corresponds to FIG. 2 of the first embodiment, and is a cross-sectional view taken along the line VII-VII of FIG.

  8 and 9 are an exploded perspective view of the disk portion 17 with respect to the sheet stacking portion 4 and a side view of FIG.

  As can be seen from these drawings, the sheet feeding device 202 installed in the copying machine 1 has a sheet stacking unit 4 for stacking sheets 3 and a disk unit 17 which is disposed on the sheet stacking unit 4 and is rotatable. A pair of restricting plates 5 for restricting the width of the sheet 3 are disposed to face the disk portion 17.

  As can be seen from FIG. 7, the pair of regulating plates 5, 5 are supported by the rail 6, and are movable on the rail 6 in the direction of arrow A. Further, by tightening the restriction plate fixing screw 7, it is fixed at an arbitrary position within the moving range on the rail 6. The rail 6 is supported by a rail stay 8, and the rail stay 8 is disposed in the disk portion 17.

  FIG. 8 shows members related to the disk portion 17. In order to place the disc portion 17 on the sheet stacking portion 4, the sheet stacking portion 4 is provided with a step 4 a having the same center of curvature as the outer periphery of the disc portion 17. By providing the step 4a, the disc portion 17 is formed with an upper step portion 4a1 and a lower step portion 4a2, and the disc portion 17 is arranged in the lower step portion 4a2. The disk part 17 rotates to follow the step 4a. Moreover, the disk part 17 has a pair of groove parts 17a which are arc-shaped and have a facing relationship as shown in FIG. The center of curvature of the arc of the groove portion 17 a is the same as the center of curvature of the outer periphery of the disk portion 17. A disk fixing screw 18 is inserted into the groove part 17a, whereby the rotation angle of the disk part 17 is regulated. The disk fixing screw 18 is screwed into a screw hole 13 a provided in the sheet stacking unit 4. The disk portion 17 is fixed to the sheet stacking portion 4 by tightening the disk fixing screw 18.

  With the above configuration, the sheet feeding device 202 is fixed by the restriction plate fixing screw 7 in a state where the clearance between the restriction surface 10c of the restriction plate 5 and the side end surface 3a of the sheet 3 is close to zero. Then, the skew correction of the sheet 3 is corrected by rotating the disk portion 17 so that the skew is zero, and then the disk portion 17 is fixed to the sheet stacking portion 4 with a disk fixing screw 18, whereby FIGS. The sheet 3 shown in FIG. 3 can be fed with high accuracy by the feed roller 14. As a result, the same effects as described in the first embodiment can be obtained, such as improvement in the right and left printing position accuracy and skew feeding accuracy of the output sample. Further, since the regulation plates 5 and 5 can be rotated simultaneously, the accuracy can be adjusted at a time. In this embodiment, simultaneous rotation of the regulating plates 5 and 5 via the disk portion 17 is referred to as interlocking, and the disk portion is referred to as interlocking means. In the second embodiment, the angle adjusting means of the restricting plate 5 is the disc portion 17. More specifically, the sheet stacking portion 4 on which the disc portion 17 is stacked and the arc shape formed on the disc portion 17 are used. Groove portion 17a, a disc fixing screw 18 inserted into the groove portion 17a, and a screw hole 13a provided in the sheet stacking portion 4 into which the disc fixing screw 18 is screwed.

A sheet feeding apparatus 203 according to the third embodiment will be described with reference to FIGS. The difference between the sheet feeding device 203 and the sheet feeding device 202 according to the second embodiment is that the regulating plates 5 and 5 are simultaneously rotated.

  A sheet feeding apparatus 203 according to the third exemplary embodiment will be described.

  FIG. 10 is a top view of the sheet feeding apparatus of the present invention.

  As shown in FIG. 10, the sheet feeding device 203 installed in the copying machine 1 includes a sheet stacking unit 4 that stacks sheets 3 and a pair of regulating plates 5 and 5 that regulate the width of the sheet 3. . As shown in FIGS. 11 to 13, these restricting plates 5 and 5 are supported and guided by a pair of rails 6 and 6 that are in parallel relation (see arrow A in FIG. 11). Further, the restriction plates 5 and 5 can be fixed at arbitrary positions on the rail 6 by tightening the restriction plate fixing screws 7.

  The rails 6 and 6 are supported by rail stays 19 and 20 which are a pair of support members that support the rails 6 and 6. The rail stay 20 is fixed to the side surface of the sheet stacking portion 4 by fixing means such as a screw 9 having high fixing strength, and the rail stay 19 is fixed by a screw 21 with a knob that can be manually tightened.

  In a state in which the screw 21 with the knob is loosened, the rail stay 19 is configured to move back and forth in the conveyance direction of the sheet 3 with respect to the rail stay 20. Then, when the service engineer or the user moves the handle 22 fixed to the rail stay 19 in the direction of arrow B with the state of FIG. 12 as the starting point of movement, the contact between the rail stay 20 and the rails 6 and 6 as shown in FIG. 23, the rail stays 19 and 20 and the rails 6 and 6 are deformed so as to draw a parallelogram. In addition, since the contact points of the regulation plate 5 and the rail 6 are three places indicated by reference numeral 24, the regulation plates 5 are rotated at the same time by changing the angle with respect to the sheet feeding direction in a parallel state (FIG. 12). 13). The angle adjustment range of the restriction plate 5 is restricted by the length of the long hole 4b shown in FIGS. This is because the handle 22 can be moved along the long hole 4b, and when the handle 22 reaches both ends of the long hole 4b, the movement of the handle 22 is restricted.

  From the above configuration, the skew 21 is adjusted to 0 by loosening the screw 21 with the knob and moving the handle 22 in the direction of arrow C shown in FIG. 14 to change the angle of the restricting plate 5. After that, the rail stay 20 is fixed with the screw 21 with the knob, and the clearance between the regulation surface 10c of the regulation plate 5 and the side end surface 3a of the seat 3 is fixed to 0 with the regulation plate fixing screw 7. The sheet 3 can be fed with high accuracy by the feed roller 14. As a result, the same effect as in the first and second embodiments can be expected.

  In the third embodiment, the angle adjusting means of the regulating plate 5 includes the rail stay 20 and the contact 23 of the rails 6 and 6, the rail stays 19 and 20 and the rails 6 and 6, and the handle 22 of the rail stay 19. . When the handle 22 is moved, the restricting plates 5 and 5 are moved simultaneously with the movement. For this purpose, the rail stay 19 -the rail 6 and the 6-contact 23 must be provided. Therefore, in this embodiment, the rail stay 20 including the rail stay 19 -the rail 6 and the 6-contact 23 is referred to as interlocking means for interlocking the pair of regulating plates 5 and 5.

  Embodiment 4 will be described with reference to FIGS. The fourth embodiment is different from the first to third embodiments described above in that a conventional paper feed mechanism is provided with a paper feed assist device (paper feed assist unit) to which the present invention is applied.

As can be seen from FIG. 15, the sheet feeding auxiliary device 26 is detachably attached to the rear portion of the sheet stacking unit 4 of the sheet feeding device 38 which is a manual sheet feeding mechanism provided in the copying machine 1 by using the mounting screw 27. Mounted. The sheet feeding device 38 includes a pair of regulating plates 39 that regulate the position of the stacked sheets in the width direction, and a sheet feeding roller 14 that feeds the sheets stacked on the sheet stacking unit 4. A sheet feeding apparatus in which the sheet feeding auxiliary device 26 is attached to the sheet feeding apparatus 38 according to the fourth embodiment is denoted by reference numeral 204.

  As shown in FIG. 16, the paper feeding auxiliary device 26 has, for example, a hollow box shape with an open end. The upper end edge of the tip has a claw portion 28 that is bent at a right angle into the hollow of the paper feeding auxiliary device 26.

  Further, the sheet feeding device 38 has a groove portion 25a that fits into the claw portion 28 of the ceiling surface.

By fitting the claw portion 28 into the groove portion 25a, the one side surface 26a of the auxiliary sheet feeding device 26 and the one side surface 25b of the sheet feeding device 38 facing the surface come into contact with each other. The sheet feeding auxiliary device 26 is positioned with respect to 38.

  Further, after attaching the sheet feeding auxiliary device 26 to the sheet feeding device 38, the sheet feeding assisting device 26 is fixed to the sheet feeding device 38 by tightening the mounting screws 27 at three positions on the side surface and the bottom surface thereof. . FIG. 17 is a partially cutaway cross-sectional view when the sheet feeding auxiliary device 26 is attached to the sheet feeding device 38. FIG. 18 is a side view of the same.

  In FIG. 18, the auxiliary device stay 29 is installed in the copying machine 1 by tightening the cover mounting screw 30. By co-fastening the auxiliary device stay 29 to the cover C of the copying machine 1 with the mounting screw 30, the paper feeding auxiliary device 26 can be used without modifying the copying machine 1. Further, the auxiliary device stay 29 and the paper feeding auxiliary device 26 are fixed by fastening the screw 31 to the auxiliary device stay 29.

  Further, as shown in FIG. 19, a pair of auxiliary restricting plates (auxiliary restricting members) 32 are supported by the rail 6 in the paper feeding auxiliary device 26. These auxiliary restricting plates 32 are movable in the direction of arrow A in FIG. Further, by tightening the restriction plate fixing screw 7, the auxiliary restriction plate 32 can be fixed at an arbitrary position within the moving range.

  The rail 6 is supported by a rail stay 8. The rail stay 8 is fixed to the side surface of the paper feed assisting device 26 with screws 9. As can be seen from FIG. 20, the auxiliary restricting plate 32 includes an upper restricting plate 33 and a lower restricting plate 11 on which the upper restricting plate 33 is placed. The configuration is substantially the same as the upper and lower restricting plates 10 and 11 according to the first embodiment described above. Therefore, the same parts are denoted by the same reference numerals and description thereof is omitted. The upper restriction plate 33 differs from the upper restriction plate 10 of the restriction plate 5 in that the auxiliary restriction plate 32 is longer.

Since the fourth embodiment has such a configuration, the restriction surface 10 c of the upper restriction plate 33 of the sheet feeding auxiliary device 26, the restriction surface of the restriction plate 39 of the sheet feeding device 38, and the side end surface 3 a of the sheet 3. The lower restricting plate 11 is fixed to the auxiliary sheet feeding device 26 with the restricting plate fixing screw 7 with the gaps between them being zero. Then, as can be seen from FIG. 21, the skew correction of the sheet 3 is performed by rotating the upper restricting plate 33, and the fixing screw 13 is tightened after adjusting the skew to be zero. Therefore, the sheet 3 can be fed with high accuracy. In the fourth embodiment, since the auxiliary paper feeding device 26 is provided, the left / right printing position accuracy and the skew feeding accuracy can be further improved. Further, since the auxiliary restricting plate 32 is provided, the sheet feeding device 38 substantially extends to the rear part by that amount. Therefore, even when a sheet having a size large enough to protrude from the rear portion of the sheet feeding device 38 is used, the sheets are stably stacked because of the auxiliary regulating plate 32. Therefore, the conveyance of the sheet is also stable.

  A fifth embodiment will be described with reference to FIGS.

  The fifth embodiment also discloses a paper feeding auxiliary device, but this paper feeding auxiliary device is different from the paper feeding auxiliary device of the fourth embodiment in that a pair of auxiliary regulating plates is used in the paper feeding auxiliary device 26 of the fourth embodiment. 32 and 32 are configured to rotate. However, in the paper feeding auxiliary device 34 according to the fifth embodiment, the auxiliary regulating plate indicated by reference numeral 35 is simultaneously rotated (linked).

  In that sense, it can be said that the sheet feeding apparatus 202 according to the second embodiment is applied to the sheet feeding auxiliary apparatus 34 according to the fifth embodiment.

  Therefore, the same parts as those in the second and / or fourth embodiment are denoted by the same reference numerals and the description thereof is omitted.

  Even in the fifth embodiment, since there is a paper feed assist device, the left and right printing position accuracy and skew feeding accuracy can be further improved.

  Further, since the auxiliary restricting plates 35 and 35 can be rotated simultaneously, the accuracy can be adjusted at a time. A sheet feeding apparatus according to the fifth embodiment is denoted by reference numeral 205.

  A sixth embodiment will be described with reference to FIGS.

  The sixth embodiment also discloses a paper feed auxiliary device. The difference between the paper feeding auxiliary device 36 according to the sixth embodiment and the paper feeding auxiliary device 34 according to the fifth embodiment is that in the paper feeding auxiliary device 34 according to the fifth embodiment, the pair of auxiliary regulating plates 35 and 35 are replaced by the disk portion 17. However, in the paper feeding auxiliary device 36 of the sixth embodiment, the mechanism of the sheet feeding device 203 of the third embodiment is applied to the auxiliary restricting plate indicated by reference numeral 37.

  Therefore, the same parts as those in the third and / or fifth embodiment are denoted by the same reference numerals and the description thereof is omitted. A sheet feeding apparatus according to the sixth embodiment is denoted by reference numeral 206.

  Even in the sixth embodiment, since there is a paper feed assist device, the left and right print position accuracy and skew feeding accuracy can be further improved.

  Further, since the auxiliary restricting plates 37 and 37 can be simultaneously rotated (linked), the accuracy can be adjusted at a time.

  As shown in FIG. 31, the pair of auxiliary restricting plates 37 are supported by the rails 6, can be moved in the direction of arrow A, and can be fixed at any position within the moving range by tightening the restricting plate fixing screws 7.

  When the handle 22 is moved in the direction of arrow C (see FIGS. 30 and 32), the rail stays 19 and 20 and the pair of rails 6 and 6 with the contact 23 of the rail 6 as a fulcrum are deformed so as to draw a parallelogram. (See FIGS. 32 and 33). At this time, since the auxiliary restricting plate 37 and the rail 6 each have three contact points 24, the angle of the restricting plate 5 is changed with respect to the sheet feeding direction while being in a parallel state. The angle adjustment range of the auxiliary restricting plate 37 is restricted by the length of the long hole 4b shown in FIG.

  Even in the sixth embodiment, since there is a paper feed assist device, the left and right print position accuracy and skew feeding accuracy can be further improved.

  Further, since the auxiliary restricting plates 37 and 37 can be rotated simultaneously, the accuracy can be adjusted at once.

(Other)
The present invention is not limited to the illustrated examples described above, and various modifications can be made without departing from the scope of the present invention.

  For example, in the case of a copying machine that can be equipped with a mechanism for manually feeding paper (manual paper feed mechanism), the above-described auxiliary restriction plate may be provided.

  In addition, an indicator such as a scale indicating the rotation position of the upper restriction plate may be provided on the lower restriction plate so that the rotation position of the upper restriction plate that performs rotation and skew correction can be visually confirmed.

1 is a top view of a sheet feeding apparatus according to a first embodiment of a sheet feeding apparatus of the present invention. It is the II-II sectional view taken on the line of FIG. 3 is an exploded perspective view of a restriction plate according to Embodiment 1. FIG. FIG. 4 is an assembly diagram of the regulation plate according to FIG. 3. FIG. 3 is a side view of the sheet feeding apparatus according to the first embodiment. FIG. 6 is a top view of the sheet feeding apparatus according to the second embodiment of the sheet feeding apparatus of the present invention. It is the VII-VII sectional view taken on the line of FIG. FIG. 6 is an exploded perspective view of a disc portion according to a second embodiment, with one part omitted. 6 is a side view of a sheet feeding apparatus according to Embodiment 2. FIG. FIG. 6 is a top view of the sheet feeding apparatus according to the third embodiment of the sheet feeding apparatus of the present invention. It is the XI-XI sectional view taken on the line of FIG. FIG. 10 is an operation explanatory diagram of a sheet feeding apparatus according to a third embodiment. FIG. 10 is an operation explanatory diagram of a sheet feeding apparatus according to a third embodiment. 6 is a side view of a sheet feeding apparatus according to Embodiment 3. FIG. FIG. 9 is a top view of a sheet feeding apparatus according to a fourth embodiment of the present invention when the sheet feeding apparatus is equipped with a sheet feeding auxiliary device. FIG. 10 is an exploded perspective view of a part of the auxiliary paper feeding device according to a fourth embodiment. FIG. 10 is a partially cutaway cross-sectional view of a sheet feeding apparatus equipped with a sheet feeding auxiliary device according to a fourth embodiment. FIG. 10 is a side view of a sheet feeding apparatus equipped with a sheet feeding auxiliary device according to a fourth embodiment. It is the XIX-XIX sectional view taken on the line of FIG. FIG. 10 is an exploded perspective view of a part of an auxiliary regulating plate of an auxiliary sheet feeding device according to a fourth embodiment. It is operation | movement explanatory drawing of the auxiliary | assistant control board which concerns on FIG. FIG. 10 is a top view of a sheet feeding apparatus according to a fifth embodiment of the present invention when the sheet feeding apparatus is equipped with a sheet feeding auxiliary device. FIG. 10 is an exploded perspective view of a part of an auxiliary sheet feeding device according to a fifth embodiment. FIG. 10 is a partially cutaway cross-sectional view of a sheet feeding device equipped with a sheet feeding auxiliary device according to a fifth embodiment. FIG. 10 is a side view of a sheet feeding apparatus equipped with a sheet feeding auxiliary device according to a fifth embodiment. It is the IIXVI-IIXVI sectional view taken on the line of FIG. FIG. 10 is a top view of a sheet feeding apparatus according to a sixth embodiment of the present invention when the sheet feeding apparatus is equipped with a paper feeding auxiliary device. FIG. 10 is an exploded perspective view of a part of an auxiliary sheet feeding device according to a sixth embodiment. FIG. 10 is a partially cutaway cross-sectional view of a sheet feeding device equipped with a sheet feeding auxiliary device according to a fifth embodiment. FIG. 10 is a side view of a sheet feeding apparatus equipped with a sheet feeding auxiliary device according to a sixth embodiment. It is the IIIXI-IIIXI sectional view taken on the line of FIG. FIG. 10 is an operation explanatory diagram of a sheet feeding apparatus according to a sixth embodiment. FIG. 10 is an operation explanatory diagram of a sheet feeding apparatus according to a sixth embodiment. It is a top view of a schematic configuration showing an embodiment of a conventional sheet feeding apparatus. It is a side view of schematic structure which shows one Example of the conventional sheet feeding apparatus. It is explanatory drawing which shows the image position accuracy of an output sample.

Explanation of symbols

1 Copier 3 Sheet 4 Sheet stacking unit (stacking means)
5 Restriction plate (regulation member)
10b Arc hole (angle adjustment means)
12 Connecting pin (angle adjustment means)
13 Fixed screw (angle adjustment means)
13a Screw hole (angle adjustment means)
14 Paper feed roller (conveying means)
26 Auxiliary feeding device 32 Auxiliary restriction plate (auxiliary restriction member)
DESCRIPTION OF SYMBOLS 201 Sheet feeding apparatus 202 Sheet feeding apparatus 203 Sheet feeding apparatus 204 Sheet feeding apparatus 205 Sheet feeding apparatus 206 Sheet feeding apparatus

Claims (7)

Sheet stacking means for stacking sheets;
Sheet conveying means for conveying the sheets stacked on the sheet stacking means;
A restricting member for restricting sheets stacked in the sheet stacking means in the width direction;
Angle adjusting means for adjusting the angle of the regulating member with respect to the sheet conveying direction;
A sheet feeding apparatus comprising:   The regulating member is provided with a pair of left and right for regulating both ends of the sheet in the width direction, and the angle adjusting means has interlocking means for interlocking the pair of regulating members for angle adjustment. The sheet feeding apparatus according to claim 1.   The sheet feeding device according to claim 1, wherein the regulating member is attachable to a sheet stacking unit. Sheet stacking means for stacking sheets;
Sheet conveying means for conveying the sheets stacked on the sheet stacking means;
A restricting member for restricting sheets stacked in the sheet stacking means in the width direction;
Angle adjusting means for adjusting the angle of the regulating member with respect to the sheet conveying direction;
Have
The sheet feeding device according to claim 1, wherein the regulating member and the angle adjusting unit are integrated into a sheet feeding auxiliary unit, and the sheet feeding auxiliary unit is detachably attached to the sheet stacking unit.   The regulating member is provided with a pair of left and right for regulating both ends of the sheet in the width direction, and the angle adjusting means has interlocking means for interlocking the pair of regulating members for angle adjustment. The sheet feeding apparatus according to claim 4.   The sheet stacking means includes a second restricting member that restricts the stacked sheets in the width direction thereof, and the auxiliary sheet feeding unit is detachable upstream of the second restricting member in the sheet conveying direction. 6. The sheet feeding device according to claim 4, wherein the sheet feeding device is arranged. The sheet feeding device according to any one of claims 1 to 6,
Image forming means for forming an image on a sheet fed from the sheet feeding device;
An image forming apparatus comprising:

Images