JP3691182B2 - Paper discharge device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper discharge device for stacking sheets after image formation.
[0002]
[Prior art]
In an image forming apparatus that transfers the content according to the original image onto a sheet, the sheet discharged after the image formation has a convex shape whose center in the width direction is located above both side edges in order to increase the sheet discharge speed. It is discharged so that it is curved in the shape of an arch and accommodated in the paper discharge device. Among image forming apparatuses, in printing apparatuses that perform stencil printing or offset printing, moisture contained in ink or dampening water supplied to the surface of the plate does not actively bend the paper. By transferring to the printing surface, the printing surface of the paper after image formation swells and extends due to the absorption of moisture and curves into a convex arch shape.
[0003]
The image-formed paper curved in a convex arch shape is easy to entrain air on the back side of the printing surface while falling toward the paper output tray of the paper output device, which causes air turbulence and air resistance. Is large, and the behavior until it is placed on the paper discharge tray becomes unstable. As a result, the orientations of both side edges may become inconsistent or it may take time to move to the placement position. If the movement behavior is not stable due to the shape of the paper itself after image formation, if the printing surface of the loaded paper is undried, the ink on that surface will be loaded next after image formation This causes a bad image such as a defective image or ink show-through.
[0004]
For the purpose of correcting the wrinkles of the paper after image formation curved in such a convex arch shape, the width of the paper is placed under the pair of side fences rotatably supported by the paper ejection tray of the paper ejection device. A correction member that fixes both side edges in the direction upward is fixed, and both sides of the width direction of the paper after image formation are in contact with the correction member to set the form of the stacked paper in an inverted arch shape. Proposed.
[0005]
[Problems to be solved by the invention]
In the conventional paper discharge device, since the correction member is fixed to the lower part of the side fence, when the side fence is tilted to the outside of the paper discharge tray when the paper stacked on the paper discharge stand is taken out, it is aligned. The sheet is scooped up by the correction member, and there is a problem that both side edges thereof become uneven. If the side fence is tilted when a large number of sheets of paper after image formation are placed on the correction member, the correction member and its mounting portion are loaded with the weight of the paper after image formation, and the correction member and side fence may be damaged. . In particular, a paper image-formed with ink contains a lot of water as compared with a paper image-formed with toner, and therefore has a heavy weight, and places a large load on the correction member and the side fence. When the correction member is fixed to the side fence, there is a problem that the storage of the paper discharge device is not good because it becomes an obstacle when the side fence is tilted to the paper discharge stand side.
[0006]
The present invention makes it possible to easily perform the operation of taking out aligned sheets while maintaining the alignment of both side edges of the sheets after image formation loaded on the output table on the output table, and damage the side fence and the correction member. It is an object of the present invention to provide a paper discharge device capable of reducing the above.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a paper discharge device for the image forming apparatus, the paper discharge base for stacking the sheets after image formation discharged from the image forming apparatus, and the paper discharge direction on the paper discharge base. Arranged on the downstream side, the end fence where the leading edge of the sheet abuts and the sheet discharge width direction intersecting the sheet discharge direction on the sheet discharge table are arranged parallel to each other, at least one of which is the discharge A pair of side fences rotatably supported toward the outside of the paper table; and a correction member that is disposed near a lower portion of each side fence and that curves both side edges of the paper upward. A correction member near the lower part of the side fence supported so as to be rotatable toward the outside of the table, The upper end of the shaft is supported by a support member provided on the paper delivery table so as to be rotatable about a shaft. It is characterized by that.
[0009]
Claim 2 In the described invention, the claims 1 In the paper discharge device described above, the support member is provided so as to be able to rise and fall on the paper discharge stand, and is held in an upright state when the side fence is rotated to the outside of the paper discharge stand. .
[0010]
Claim 3 In the described invention, the claims 1 Or 2 In the paper discharge device described above, the support member and the side fence are provided so as to be movable up and down toward the paper discharge table, and are engaged with a part of the side fence when the side fence is rotated toward the paper discharge table. The first engaging portion to be combined is formed on the support member.
[0011]
Claim 4 In the described invention, the claims 3 In the paper discharge device described above, when the side fence rotates toward the standing position, the side fence engages with the portion of the support member that is positioned on the rotation track toward the standing position of the side fence. The second engaging portion is provided.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is a paper discharge device used in an image forming apparatus. Examples of the image forming apparatus include a copying apparatus that forms a toner image and a printing apparatus that forms an ink image. The paper after image formation discharged from these apparatuses falls on the end fence disposed on the downstream side of the paper discharge direction on the paper discharge table and falls and is stacked on the paper discharge table. A pair of side fences, at least one of which is rotatably supported toward the outside of the paper discharge table, are arranged in parallel to each other in the paper discharge width direction that intersects the paper discharge direction on the paper discharge table. . In the vicinity of the lower part of the pair of side fences, a correction member that curves both side edges of the paper upward is arranged, and the correction member that is positioned on the side fence side that rotates to the outside of the paper discharge tray that is one of the correction members is discharged. Provide on the table side.
[0013]
If the side fence side correction member that rotates to the outside is provided on the paper discharge stand side, when the side fence is rotated toward the outside of the paper discharge stand, the correction member will not rotate together, and correction is made. Disturbance of the paper after image formation stacked on the paper discharge table and the correction member due to the movement of the member is eliminated. In addition to one of the correction members, both may be provided on the paper discharge table side.
[0014]
When the correction member provided on the discharge tray side is provided with its upper end pivotably supported by a support member provided on the discharge tray, the side fence is rotated toward the outside of the discharge tray. In addition, since the correction member does not rotate together, the paper discharge tray and the paper after image formation stacked on the correction member are not disturbed by the movement of the correction member. It is good also as a structure which provides not only one correction | amendment member but both are rotatably supported by the support member.
[0015]
If the support member is provided so as to be able to rise and fall on the discharge table and is held in an upright state when the side fence is rotated to the outside of the discharge table, the support member can be supported even if the side fence is rotated outward. Is held in an upright state, and there is less disturbance of the paper sheet after the image formation stacked on the paper discharge table and the correction member due to the movement of the correction member.
[0016]
A support member and a side fence are provided so as to be able to be raised and lowered toward the paper discharge table, and a first engagement portion that engages with a part of the side fence when the side fence is rotated toward the paper discharge table is provided as a support member. To form. When the side fence is rotated toward the paper discharge table, the first engaging portion provided on the support member and a part of the side fence are engaged, and the support member falls in the same direction as the side fence.
[0017]
A second engagement portion that engages with the side fence when the side fence rotates toward the standing position may be provided at a portion of the support member that is positioned on the rotation track toward the standing position of the side fence. good. In this case, the support member is rotated in the same direction by the rotation operation of the side fence to the standing position, and the side fence and the support member are erected together.
[0018]
【Example】
(First embodiment)
In FIG. 1, a stencil printing apparatus 90 as an image forming apparatus to which a paper discharge device 1 is mounted includes a plate cylinder 2 that can rotate forward and backward about a rotation shaft 2A. The plate cylinder 2 is set to rotate in the clockwise direction when the printing process is executed and in the counterclockwise direction when the master is discharged. The plate cylinder 2 is formed with a large number of perforations on the peripheral surface except for a part thereof, and a thin layer mesh screen (not shown) is attached to the surface thereof.
[0019]
A portion of the peripheral surface of the plate cylinder 2 where the perforations are not formed includes a stage 2C made of a magnetic material along one generatrix of the plate cylinder 2, and a gripping member 2D supported so as to be able to contact with and separate from the stage 2C. And a clamper 2B that clamps the tip of the stencil master 11 is provided. The area other than the tip of the master 11 is attached to the surface of the plate cylinder by the adhesive force of ink supplied from the ink supply mechanism 3 described later to the surface of the plate cylinder 2.
[0020]
An ink supply mechanism 3 is provided inside the plate cylinder 2. The ink supply mechanism 3 is disposed substantially directly below the rotation shaft 2A, and includes an ink roller 3A and a doctor roller 3B as main parts. The ink roller 3 </ b> A is disposed below the rotation shaft 2 </ b> A of the plate cylinder 2 at a position facing the press roller 4, and is a speed synchronized with the peripheral speed of the plate cylinder 2 while contacting the inner peripheral surface of the plate cylinder 2. And the ink whose amount is defined by the doctor roller 3B can be supplied into the plate cylinder 2 and the perforations of the mesh screen. The ink whose carrying amount is regulated by the doctor roller 3B is dropped from an ejection port formed on the rotating shaft 2A into an ink reservoir formed by a wedge-shaped space formed by the both rollers. .
[0021]
The press roller 4 is a rotating member provided so as to be able to contact and separate from the plate cylinder 2 and presses the sheet S toward the surface of the plate cylinder 2 when the sheet S is fed from a registration roller 9 described later. When the paper S is pressed, an image transfer unit is configured to perform printing by transferring ink from the perforation of the master mounted on the plate cylinder 2.
[0022]
A paper feeding device 5 is provided on the right side of the press roller 4. The sheet feeding device 5 is provided so as to be able to come into contact with and separate from the uppermost sheet S stored in the sheet feeding tray 5A, and feeds the sheet S in a feeding direction corresponding to the arrow direction in the figure, Feeding of the paper S to the abutting portions of the separation rollers 7 and 8 and the plate cylinder 2 and the press roller 4 which are arranged opposite to each other across the feeding path of the paper S and prevent the feeding of the fed paper S, and the plate cylinder 2 and the press roller 4 It consists of a registration roller 9 for setting timing. In the paper feeding device 5, the paper S is fed out by rotating the feed roller 6 in contact with the uppermost one of the paper S accommodated in the paper feeding tray 5 A, and the uppermost paper is separated by the separation rollers 7 and 8. Only S is fed toward the registration roller 9.
[0023]
A plate making unit 10 is disposed above the sheet feeding device 5. In the plate making unit 10, a stencil master 11 wound around a core 11 </ b> A in a roll shape is sent out toward the plate cylinder 2, and is sandwiched between a thermal head 12 and a platen roller 13 to selectively select a heating element of the thermal head 12. The punching process corresponding to the original is performed by generating heat. The stencil master 11 that has finished the punching process is disposed between the plate cylinder 2 and the platen roller 13, and is sandwiched between a pair of transport rollers 14 that rotate at a transport speed slightly faster than the transport speed of the stencil master 11, and the cutter 15. Then, it is cut to a required length, and its tip is clamped by the clamper 2B and wound around the peripheral surface of the plate cylinder 2.
[0024]
An image reading unit 16 is installed on the upper part of the stencil printing apparatus 90. The image reading unit 16 has a document placing table 17 installed on the upper surface of the apparatus main body, an image scanning unit is provided below the document placing table 17, and an automatic document feeding device is provided above. ing. The image scanning unit is provided so as to be capable of reciprocating along the longitudinal direction of the document placing table 17. The image scanning unit illuminates the document P located on the document placing table 17, and reflects light from the document P to the CCD 19. Are formed of a plurality of reflecting mirrors 20 and a variable power lens 21 for forming an imaging optical path directed to the lens. The automatic document feeder includes a roller 22 that feeds a document P from a document placement unit 27 and a plurality of conveyance roller pairs 23, 24, and 25. The document P placed on the document placement unit 27 is a document. The image is scanned on the mounting table 17.
[0025]
The image reading unit 16 outputs image information obtained by taking the reflected light from the document P into the CCD 19 to the control unit 26. When the reading data of the document P from the image reading unit 16 is input, the control unit 26 controls the driving unit of the thermal head 12 according to the input information.
[0026]
A plate discharging unit 30 is disposed above the paper discharge device 1. The plate discharging unit 30 is configured by a pair of belts 32 arranged between one roller 30A accessible to the plate cylinder 2 and the other roller 30B located on the plate discharging box 31 side. In the plate removal unit 30, when the plate cylinder 2 rotates counterclockwise, the rear end of the stencil master 11 is received and transferred toward the plate release box 31. An upper and lower compression member 33 is provided on the upper portion of the discharge box 31 so as to prepare an accommodation space for the stencil master 11 to be compressed and then discarded. It has become.
[0027]
A separation claw 40 that can approach and separate from the plate cylinder 2 is provided on the downstream side of the position where the press roller 4 faces the plate cylinder 2 when rotating in the clockwise direction. The sheet S is peeled off from the plate cylinder 2 and guided toward the discharge conveyance device 41. The discharge conveyance device 41 includes an endless conveyance belt 44 that is stretched between a pair of rollers 42 and 43, and conveys the paper S that has been peeled off from the plate cylinder 2 toward the paper discharge device 1. . A suction fan 46 for sucking and transporting the paper S to the transport belt 44 is disposed below the transport belt 44.
[0028]
In the stencil printing apparatus 90, the following printing process is executed. The plate cylinder 2 rotates counterclockwise, and the stencil master 11 mounted on the plate cylinder 2 is clamped by the belt 32 of the plate discharge unit 30, transferred toward the plate discharge box 31 and removed from the plate cylinder 2. When the plate cylinder 2 is rotated in the clockwise direction, the ink supply mechanism 3 causes the ink accumulated in the ink reservoir to be kneaded by the doctor roller 3B and transferred to the ink roller 3A to penetrate into the mesh screen of the plate cylinder 2. I will do it.
[0029]
In the plate making unit 10, heat generation control of the heating elements of the thermal head 12 is performed via the control unit 26 in accordance with the character image information from the image reading unit 16, and punching processing is executed in accordance with the character image of the document to perform stencil printing. Plate making to the master 11 is performed. The stencil master 11 thus made is gripped and fixed at its tip by a clamper 2B located on the plate cylinder 2, and is mounted on the peripheral surface of the plate cylinder 2.
[0030]
As the stencil master 11 reaches the position of the ink supply mechanism 3, the sheet S is fed out with the image transfer timing set by the registration roller 9 and fed to the image transfer position facing the ink supply mechanism 3. It is pressed toward the surface of the plate cylinder 2 by the press roller 4. As a result, the ink that has passed through the mesh screen of the plate cylinder 2 passes through the perforations of the stencil master 11 and is transferred to the surface of the paper S, and the original image is transferred and printed. After the printing, the sheet S1 is discharged toward the paper discharge device 1 via the discharge conveyance device 41.
[0031]
The paper discharge device 1 is disposed opposite to the paper supply device 5 with the press roller 4 interposed therebetween. As shown in FIG. 2, the paper discharge device 1 also includes a paper discharge tray 50 on which the printed paper S1 discharged from the stencil printing apparatus 90 is stacked, and a downstream side in the paper discharge direction indicated by an arrow A of the paper discharge tray 50. End fence 51 that is disposed on the side and abutted with the leading edge S1a of the sheet S1, a pair of side fences 52 and 53 that are disposed in the sheet discharge width direction that intersects the sheet discharge direction A indicated by the double arrow B, and a pair that serves as a correction member. The correction plates 54 and 55 and the support member 56 that supports the correction plate 55 are mainly configured.
[0032]
In the paper discharge device 1, the engagement plates 57a and 57b provided facing the paper discharge tray width direction B are hooked on the shafts 58a and 58b fixed to the paper discharge side of the stencil printing device 90, and the shafts 58a and 58b are centered. 1 is supported so as to be rotatable toward the side surface 90a of the stencil printing apparatus 90 shown in FIG. The paper discharge device 1 is arranged so that the side fence 53 is located on the front side where the operator of the stencil printing device 90 indicated by the symbol Z is located.
[0033]
The discharge table 50 is formed in a box shape having an internal space, and a rail 60 is laid on the bottom plate 50a in the discharge table width direction B. Two sliders 61 and 62 to which support plates 63 and 64 are fixed are slidably supported on the rail 60. The sliders 61 and 62 are engaged with the rail 60 so that the support plates 63 and 64 can be moved only in the vertical direction.
[0034]
Racks 65 and 66 extending in the sheet discharge width direction B are fixed to the support plates 63 and 64 with their teeth 65a and 66a facing each other. The tooth portions 65a and 66a of the racks 65 and 66 mesh with a common pin-on 68 that is rotatably supported by a shaft 67 provided on the bottom plate 50a, so that the side fences 52 and 53 are placed in the paper discharge width direction B. Relative movement is possible.
[0035]
As shown in FIG. 3, the side fence 52 is directed toward the outer side of the paper discharge tray indicated by the arrow C and toward the inner side of the paper discharge tray indicated by the arrow D, by the shaft 69 extending in the paper discharge direction A. It is rotatably supported. The correction plates 54 and 55 curve the side edges S1b and S1c of the paper S1 upward. As shown in FIG. 3, the correction plate 54 has an upper end 54 a that is rotatably supported by a shaft 70 below the side fence 52, and a lower end 54 b that is self-weighted on the upper surface 50 b of the paper discharge tray 50. It is in contact.
[0036]
As shown in FIGS. 4 and 5, the support member 56 extends in the paper discharge direction A, and has a central lower portion 56 a protruding downward. The bottom of the central lower portion 56 a forms a flat surface, and is placed on a movable plate 82 provided on the paper discharge table 50, so that the support member 56 stands on the paper discharge table 50. A concave portion 71 is formed in the upper portion of the central lower portion 56a so as to penetrate the support member 56 in the paper discharge width direction B. On both sides of the recess 71, slits 74 and 75 for inserting both side portions 64 a and 64 b of the support plate 64 are formed so as to penetrate the support member 56 in the vertical direction. Long holes 72 and 73 are formed in the lower part of both side surfaces 71a and 71b of the recess 71 so as to face each other and penetrate the slits 74 and 75.
[0037]
At both ends in the longitudinal direction of the support member 56, concave portions 76 and 77 opened in the vertical direction are formed. A pair of support holes 78 and 79 are coaxially formed on the side surfaces 76a and 76b and the side surfaces 77a and 77b of the recesses 76 and 77, respectively. Support portions 55c and 55d formed on the upper end 55a side of the correction plate 55 are inserted into the recesses 76 and 77, respectively. The correction plate 55 has shafts 81A and 81B inserted through holes 80a and 80b formed in the support portions 55c and 55d and support holes 78 and 79 of the recesses 76 and 77, respectively, so that the upper end portion 55a side is supported by the support member 56. The lower end 55b is brought into contact with the upper surface 50b of the paper discharge tray 50 by its own weight. That is, as shown in FIG. 3, the correction plates 54 and 55 are disposed on the paper discharge tray 50 in an inclined shape that decreases from the side fences 52 and 53 toward the center of the paper discharge tray 50.
[0038]
The side fence 53 is made of resin, and a pair of arm portions 53a and 53b extending toward the concave portion 71 are formed in the central lower portion so as to face each other. On the arm portions 53a and 53b, shafts 83A and 83B project from the long holes 72 and 73, respectively. The shafts 83A and 83B are arranged on the same axis, and are inserted into the long holes 72 and 73, respectively, to support the side fence 53 so as to be rotatable in the discharge table outer direction C and the discharge table inner direction D. are doing.
[0039]
As shown in FIG. 6, the lower surface 53A of the side fence 53 and the upper surface 56A of the support member 56 are respectively formed on arcuate surfaces that are downwardly lowered toward the sheet discharge tray outer side direction C. The lower surface 53 </ b> A is formed in an arcuate surface with the lower end inner edge 56 </ b> C of the support member 56 as the center. The upper surface 56A is formed in a circular arc surface that follows the lower surface 53A, and the upper edge portion 56B of the upper surface 56A on the rotation track O of the inner edge portion 53B of the lower surface 53A when the side fence 53 rotates about the shafts 83A and 83B. And constitutes a first engaging portion.
[0040]
An opening 50c is formed on the upper surface 50b of the paper discharge tray 50 located below the central lower portion 56a of the support member 56. In this opening 50 c, a movable plate 82 whose side surface is bent downward is disposed so as to place the central lower portion 56 a of the support member 56. Boss portions 82b and 64d are formed on the upper portion 82a of the movable plate 82 and the bottom portion 64c of the support plate 64, respectively. Both ends of the coil spring 86 are engaged with these boss portions 82b and 64d, and the movable plate 82 is supported on the support plate 64 so as to be slidable in the vertical direction. The coil spring 86 applies an upward biasing force to the support member 56.
[0041]
As shown in FIG. 5, the support plate 64 is formed in a U-shaped cross section, and is formed so that both side portions 64 a and 64 b are opposed to the groove portions 84 and 85 extending in the paper discharge tray width direction B. Yes. The groove portions 84 and 85 are adapted to engage with shafts 83A and 83B inserted through the long holes 72 and 73, respectively. In FIG. 6, only one shaft 83A is shown. The deep portions 84a and 85a of the groove portions 84 and 85 are formed in an elongated hole shape extending in the vertical direction, and restrict the position of the support member 56 that is lifted and biased by the ascending behavior of the movable plate 82 together with the shafts 83A and 83B. are doing. In this embodiment, when the support member 56 is in the standing position shown by a solid line in FIG. It has become. In FIG. 6, reference numeral 87 denotes a stopper member fixed to the rail 60 that regulates the sliding range of the support plate 64.
[0042]
(Description of operation)
The paper S1 that has been printed and is discharged toward the paper discharge device 1 is curved into a convex arch shape with its side edges S1b and S1c lowered from the center as shown in FIG. Then, it falls toward the paper discharge tray 50. The sheet S1 is guided by the side edges S1b and S1c on the inner side surfaces of the side fences 52 and 53 and dropped, and the side edges S1b and S1c are positioned at the correction plates 54 and 55 located on the paper discharge tray 50 from the center. It is corrected and loaded into a concave arch shape located above.
[0043]
When taking out the sheets S1 stacked on the paper discharge tray 50, the side fence 53 is pushed toward the paper discharge tray outer direction C as shown in FIG. Since the side fence 53 rotates about the shafts 83A and 83B, the inner edge 53B moves on the rotation track O and rotates without interfering with the upper surface 56A of the support member 56. When the side fence 53 is rotated in the sheet discharge tray outer side direction C, the support member 56 is held in the upright position, and the correction plate 55 attached to the support member 56 does not rotate together with the side fence 53. . Therefore, even if the side fence 53 is rotated for taking out the paper, the paper S1 stacked on the paper discharge tray 50 and the correction plates 54 and 55 can be taken out without being disturbed, and the correction plate 55 and the side fence 53 are impossible. Load is not applied and there is no risk of damage to both. Since the support member 56 that supports the correction plate 55 is disposed on the front surface Z side where the operator is located, the operation of taking out the sheet S1 is facilitated.
[0044]
When the side fence 53 placed at the upright position indicated by the two-dot chain line in FIG. 8 is pushed in the paper discharge tray inner direction D, the lower surface 53A of the side fence 53 is engaged with the upper surface 56A of the support member 56 serving as the first engaging portion. Together they begin to rotate together. Then, the support member 56 rotates toward the inner side D of the sheet discharge table with the shafts 83A and 83B as the rotation center. When the support member 56 rotates, the movable plate 82 is pushed down against the urging force of the coil spring 86 by the lower end inner edge portion 56 </ b> C. When the lower end inner edge portion 56C is located downstream of the shafts 83A and 83B in the rotational direction, the movable plate 82 is lifted by the urging force of the coil spring 86 to lift the support member 56, and the side fence 53 is moved toward the inner side D of the paper discharge tray. Assists in turning. As shown in FIG. 9, this rotation is performed until the correction plate 55 comes into contact with the movable plate 82, and the support member 56 and the side fence 53 occupy the fall position indicated by the solid line. When the side fence 53 is rotated in the paper discharge tray inner direction D, the support member 56 also falls on the paper discharge tray 50, so that the storage property is good.
[0045]
The side fence 53 and the support member 56 occupy the fall position shown by the solid line in FIG. 9, and when the side fence 53 is rotated toward the standing position from this state, only the support member 56 is fallen on the paper discharge tray 50. It will remain. In order to return both to the standing position at once, the operator may insert a finger F between the correction plate 55 and the upper surface 50b of the paper discharge tray 50 and lift it toward the standing position.
[0046]
(Second embodiment)
As shown in FIG. 10, the paper discharge device 100 includes a paper discharge tray 150 on which the printed paper S1 discharged from the stencil printing device 90 is stacked, and a downstream side of the paper discharge direction indicated by an arrow A of the paper discharge tray 150. A pair of side fences 152 and 153 arranged in the width direction of the paper discharge tray intersecting the paper discharge direction A indicated by the double arrow B, and a pair of correction members. It mainly comprises correction plates 154 and 155 and a support member 156 that supports the correction plate 155.
[0047]
In the paper discharge device 100, the engagement plates 157a and 157b provided facing the paper discharge width direction B are hooked on the shafts 158a and 158b fixed to the paper discharge side of the stencil printing apparatus 90, and the shafts 158a and 158b are connected. A stencil printing apparatus 90 is supported at the center so as to be rotatable toward the side surface 90a (see FIG. 1). The paper discharge device 100 is arranged such that the side fence 153 is positioned on the front side where the operator of the stencil printing device 90 indicated by the symbol Z is positioned.
[0048]
The sheet discharge table 150 is formed in a box shape having an internal space, and a rail 160 is laid on the bottom plate 150a in the sheet discharge table width direction B. Two sliders 161 and 162 to which support plates 163 and 164 are fixed are slidably supported on the rail 160. The sliders 161 and 162 are engaged with the rail 160 so that the support plates 163 and 164 can be moved only slightly in the vertical direction.
[0049]
Racks 165 and 166 extending in the sheet discharge width direction B are fixed to the support plates 163 and 164 with their teeth portions 165a and 166a facing each other. The teeth 165a and 166a of the racks 165 and 166 mesh with a common pin-on 168 rotatably supported by a shaft 167 provided on the bottom plate 150a, and the side fences 152 and 153 are directed in the sheet discharge width direction B. The relative movement is possible.
[0050]
As shown in FIG. 11, the side fence 152 is rotated in the direction toward the outer side of the paper tray indicated by the arrow C and toward the inner side of the paper tray indicated by the arrow D, as shown in FIG. 11 by the shaft 169 extending toward the paper discharge direction A. It is supported movably. The correction plates 154 and 155 curve the side edges S1b and S1c of the paper S1 upward. The correction plate 154 has an upper end portion 154a rotatably supported on a lower portion of the side fence 152 by a shaft 170, and a lower end portion 154b abutted against the upper surface 150b of the paper discharge tray 150 by its own weight.
[0051]
As shown in FIG. 12, the support member 156 extends from the stencil printing apparatus 90 side in the paper discharge direction A, and has a central lower portion 156a protruding downward. The bottom of the central lower portion 156 a forms a flat surface, and is placed on a movable plate 182 provided on the paper discharge table 150 so that the support member 156 is erected on the paper discharge table 150. A concave portion 171 is formed in the upper portion of the central lower portion 156a so as to penetrate the support member 156 in the paper discharge width direction B. On both sides of the recess 171, slits 174 and 175 for inserting both side portions 164 a and 164 b of the support plate 164 are formed so as to penetrate the support member 156 in the vertical direction. Long holes 172 and 173 are formed in the lower part of both side surfaces 171a and 171b of the recess 171 so as to face each other up to the slits 174 and 175.
[0052]
Concave portions 176 and 177 are formed at both ends in the longitudinal direction of the support member 156 so as to open in the vertical direction. A pair of support holes 178 and 179 are formed coaxially on the side surfaces 176a and 176b and the side surfaces 177a and 177b of the recesses 176 and 177, respectively. In the recesses 176 and 177, support portions 155c and 155d formed on the upper end 155a side of the correction plate 155 are inserted. The correction plate 155 has shafts 181A and 181B inserted through holes 180a and 180b formed in the support portions 155c and 155d and support holes 178 and 179 in the recesses 176 and 177, respectively, so that the upper end portion 155a side is supported by the support member 156. The lower end 155b is brought into contact with the upper surface 150b of the paper discharge tray 150 by its own weight. That is, as shown in FIG. 11, the correction plates 154 and 155 are disposed on the paper discharge table 150 in an inclined state that descends from the side fences 152 and 153 toward the center of the paper discharge table 150. .
[0053]
On the upper surface 156A of the support member 156, a wall portion 156B serving as a first engagement portion is provided. The wall portion 156B is arranged so as to be divided on both sides of the concave portion 171 and is formed so as to protrude upward from the upper surface 156A toward the inside of the paper discharge tray 150 on the upper surface 156A. The back surface 156C of the wall portion 156B is formed in an inclined surface that expands toward the bottom as it goes downward.
[0054]
The side fence 153 is made of resin, and is formed at the center lower portion thereof with a pair of arm portions 153a and 153b extending toward the concave portion 171 facing each other. The arm portions 153a and 153b are provided with shafts 183A and 183B projecting toward the long holes 172 and 173, respectively. The shafts 183A and 183B are arranged on the same axis, and as shown in FIG. 13, the side fences 153 are inserted into the long holes 172 and 173, respectively, so that the side fences 153 are disposed in the discharge table outer direction C and the discharge table inner direction. D is rotatable. In FIG. 13, only one long hole 172 and the shaft 183A are shown.
[0055]
The lower surface 153A of the side fence 153 is arranged with a gap between the upper surface 156A of the opposing support member 156 and is formed so that the step portion 153B faces the wall portion 156B in the longitudinal direction. The step portion 153B is provided so as to be recessed toward the outside of the paper discharge tray 150 from the inner side surface 153D of the side fence 153, and can accommodate the wall portion 156B when the side fence 153 occupies the standing position shown by the solid line in FIG. It is deep. Like the back surface 156C of the wall portion 156B, the inner surface 153C of the step portion 153B is formed in an inclined surface that widens toward the end. It is supposed to be ranked.
[0056]
An opening 150c is formed in the upper surface 150b located below the center lower portion 156a of the support member 156. A movable plate 182 that is bent downward on both sides is disposed in the opening 150c, and a central lower portion 156a is placed thereon. Boss portions 182 b and 164 d are formed on the upper portion 182 a of the movable plate 182 and the bottom portion 164 c of the support plate 164. Both ends of the coil spring 186 are respectively engaged with these boss portions 182b and 164d, and the movable plate 182 is supported on the support plate 164 so as to be slidable in the vertical direction. The coil spring 186 applies a rising biasing force to the movable plate 182.
[0057]
The support plate 164 has a U-shaped cross section. Grooves 184 and 185 extending in the sheet discharge width direction B are formed on both side portions 164a and 164b of the support plate 164 so as to face each other. The groove portions 184 and 185 are engaged with shafts 183A and 183B inserted through the long holes 172 and 173, respectively. The deep portions 184a and 185a of the groove portions 184 and 185 are formed in a long hole shape extending in the vertical direction, and restrict the position of the support member 156 that is lifted and biased by the ascending behavior of the movable plate 182 together with the shafts 183A and 183B. are doing. In the second embodiment, when the support member 156 is in the standing position shown in FIG. 13, the wall portion 156B is urged to the step portion 153B of the side fence 153 by the coil spring 186 so that the side fence 153 is as illustrated. Holding in the standing position. In FIG. 13, reference numeral 187 denotes a stopper member fixed to the rail 160 that regulates the sliding range of the support plate 164.
[0058]
(Description of operation)
The paper S1 that has been printed and is discharged toward the paper discharge device 100 is curved into a convex arch shape with its side edges S1b and S1c lowered from the center as shown in FIG. Then, it falls toward the sheet discharge table 150. The sheet S1 falls while being guided by the inner surfaces of the side fences 152 and 153 on both side edges S1b and S1c, and the side edges S1b and S1c are higher than the center part by the correction plates 154 and 155 positioned on the paper discharge table 150. It is corrected and loaded into a concave arch shape located in the area.
[0059]
When taking out the sheet S1 loaded on the paper discharge tray 150, as shown in FIG. 13, when the side fence 153 is pushed toward the paper discharge tray outer direction C, the side fence 153 is centered on the shafts 183A and 183B. Rotate. When the side fence 153 is rotated in the paper discharge tray outer side direction C, the support member 156 is held in the upright position, and the correction plate 155 attached to the support member 156 does not rotate together with the side fence 153. .
[0060]
Even if the side fence 153 is rotated for taking out the paper, the paper S1 stacked on the paper discharge table 150 and the correction plates 154 and 155 can be taken out without being disturbed, and the correction plate 155 and the side fence 153 are not possible. No load is applied and there is no risk of damage to both. Since the support member 156 that supports the correction plate 155 is disposed on the front surface Z side where the operator is located, it is easy to take out the sheet S1.
[0061]
When the side fence 153 placed at the upright position shown by the solid line in FIG. 13 is pushed in the sheet discharge table inner direction D, the inner surface 153C of the step portion 153B of the side fence 153 becomes the back surface of the wall portion 156B that becomes the first engagement portion. Press 156C. As a result, the side fence 153 and the support member 156 rotate toward the inner side D of the paper discharge tray with the shafts 183A and 183B as the rotation centers. When the support member 156 rotates, the movable plate 182 is pushed down against the urging force of the coil spring 186 at the lower end inner edge portion 156E. When the lower end inner edge 156E is positioned downstream of the shafts 183A and 183B in the rotation direction, the movable plate 182 is lifted by the urging force of the coil spring 186 to lift the support member 156, and the side fence 153 is moved in the direction D of the paper discharge tray. Assists in turning. This rotation is performed until the correction plate 155 comes into contact with the movable plate 182, and the support member 156 and the side fence 153 occupy the fall position shown by the solid line in FIG. Accordingly, when the side fence 153 is rotated in the paper discharge tray inner direction D, the support member 156 is also tilted on the paper discharge tray 150, so that the storage property is good.
[0062]
The side fence 153 and the support member 156 occupy the fall position shown by the solid line in FIG. 14, and when the side fence 153 is rotated toward the standing position from this state, only the support member 156 is fallen on the paper discharge table 150. It will remain. In order to return both to the standing position at once, the operator may insert a finger F between the correction plate 155 and the upper surface 150b of the discharge table 150 and lift it toward the standing position.
[0063]
(Third embodiment)
As shown in FIG. 15, the paper discharge device 200 includes a paper discharge tray 250 on which the paper S <b> 1 that has been printed out from the stencil printing apparatus 90 is stacked, and a downstream side in the paper discharge direction indicated by an arrow A of the paper discharge tray 250. And a pair of side fences 252 and 253 arranged in the width direction of the paper discharge tray intersecting the paper discharge direction A indicated by the double arrow B, and a pair of correction members. It is mainly composed of correction plates 254 and 255 and a support member 256 that supports the correction plate 255.
[0064]
In the paper discharge device 200, the engagement plates 257a and 257b provided facing the paper discharge width direction B are hooked on the shafts 258a and 258b fixed to the paper discharge side of the stencil printing device 90, and the shafts 258a and 258b are connected. A stencil printing apparatus 90 is supported at the center so as to be rotatable toward the side surface 90a (see FIG. 1). The paper discharge device 200 is arranged so that the side fence 253 is located on the front side where the operator of the stencil printing device 90 indicated by the symbol Z is located.
[0065]
The discharge table 250 is formed in a box shape having an internal space, and a rail 260 is laid on the bottom plate 250a in the discharge table width direction B. Two sliders 261 and 262, to which support plates 263 and 264 are fixed, are slidably supported on the rail 260, respectively. The sliders 261 and 262 are engaged with the rail 260 so that the support plates 263 and 264 can move only slightly in the vertical direction.
[0066]
Racks 265 and 266 extending in the paper discharge width direction B are fixed to the support plates 263 and 264 with their tooth portions 265a and 266a facing each other. The teeth 265a and 266a of the racks 265 and 266 are meshed with a common pin-on 268 rotatably supported by a shaft 267 provided on the bottom plate 250a, and the side fences 252 and 253 are directed in the sheet discharge width direction B. The relative movement is possible.
[0067]
As shown in FIG. 16, the side fence 252 is rotated in the direction toward the outer side of the paper tray indicated by the arrow C and toward the inner side of the paper tray indicated by the arrow D, as shown in FIG. 16 by the shaft 269 extending toward the paper discharge direction A. It is supported movably. The correction plates 254 and 255 bend the side edges S1b and S1c of the sheet S1 upward. The correction plate 254 has an upper end 254a supported on the lower portion of the side fence 252 by a shaft 270 so that the lower end 254b is brought into contact with the upper surface 250b of the discharge table 250 by its own weight.
[0068]
The support member 256 extends in the paper discharge direction A and has a central lower portion 256a protruding downward. The bottom of the central lower portion 256 a forms a flat surface, and is placed on a movable plate 282 provided on the paper discharge table 250 so that the support member 256 stands on the paper discharge table 250. A concave portion 271 is formed in the upper portion of the central lower portion 256a. The recess 271 passes through the support member 256 in the paper discharge width direction B. On both sides of the recess 271, slits 274 and 275 for inserting both side portions 264 a and 264 b of the support plate 264 are formed so as to penetrate the support member 256 in the vertical direction. A shaft 272 penetrates and is fixed to the slits 274 and 275 at the lower part of both side surfaces 271a and 271b of the recess 271.
[0069]
At both ends in the longitudinal direction of the support member 256, recesses 276 and 277 opened in the vertical direction are formed. Support holes 278 and 279 are formed coaxially on the side surfaces 276a and 276b and the side surfaces 277a and 277b of the recesses 276 and 277, respectively. Support portions 255c and 255d formed on the upper end 255a side of the correction plate 255 are inserted into the recesses 276 and 277, respectively. The correction plate 255 has shafts 281A and 281B inserted through holes 280a and 280b formed in the support portions 255c and 255d and support holes 278 and 279 of the recesses 276 and 277, respectively, so that the upper end portion 255a side is supported by the support member 256. The lower end 255b is brought into contact with the upper surface 250b of the paper discharge tray 250 by its own weight. That is, as shown in FIG. 16, the correction plates 254 and 255 are disposed on the sheet discharge table 250 in an inclined shape that descends from the side fences 252 and 253 toward the center of the sheet discharge table 250.
[0070]
The side fence 253 is made of resin, and as shown in FIGS. 17 and 18, the outer portion 290 is formed to extend downward, and the inner surface 290 a of the outer portion 290 and the side surface are formed on the lower surface 253 A of the side fence 253. A step portion 292 reaching the inner surface 253B of the fence 253 is formed. The step portion 292 is formed so as to be able to accommodate the support member 256, and the claw portion 293 is formed and arranged by extending the inner side surface 253 </ b> B toward the inner side of the paper discharge tray 250. An inner surface 293 a of the claw portion 293 is formed on an inclined surface facing the inner side of the sheet discharge table 250.
[0071]
A shaft 283 that is rotatably supported by a pair of bearing portions 291 formed at the lower outer side of the support member 256 is disposed at the lower end 290b of the outer portion 290 so that both ends thereof protrude in the longitudinal direction of the support member 256. It is fixed. The shaft 283 supports the side fence 253 such that the side fence 253 can rotate in the discharge table outer side direction C and the discharge table inner direction D. Each bearing portion 291 is formed so as to be placed on the upper surface 250 b of the paper discharge tray 250.
[0072]
As shown in FIG. 18, a convex portion 295 is formed on the upper surface of the rear surface 256 b of the support member 256 toward the outside of the paper discharge tray 250. This convex portion 295 constitutes a first engaging portion that comes into contact with the inner surface 290a of the outer portion 290 when the side fence 253 rotates from the standing position indicated by the solid line in FIG. . When the convex portion 295 is not formed, the rear surface 256b becomes the first engaging portion if the inner surface 290a is brought into direct contact with the rear surface 256b.
[0073]
The upper surface 256 </ b> A of the support member 256 is formed in an arc shape that descends in the direction D of the paper discharge tray. The upper surface 256A is rotated by the front end portion 293b of the claw portion 293 when the side fence 253 rotates about the shaft 283 in the outer direction C of the paper discharge table as it goes from the inner edge side 256B to the outer edge side 256C. The curvature is below the orbit O ′. On the upper surface 256A in the vicinity of the inner edge side 256B, a protrusion 273 serving as a second engagement portion that engages with the inner surface 293a of the claw portion 293 is provided with the central recess 271 as a boundary.
[0074]
The protrusion 273 has a semi-cylindrical shape and is disposed on the upper surface 256A with its arc surface facing upward so as to engage with the inner surface 293a of the claw portion 293. The protrusion 273 is arranged on the rotation track OA of the tip 293b when the side fence 253 is moved from the fall position shown by the solid line in FIG. 20 to the standing position, and the side fence 253 is directed from the fall position to the standing position. When it rotates, it engages with the inner surface 293a of the claw portion 293. The amount of overlap between the protrusion 273 and the inner surface 293a is set such that the front end 293b can get over when the side fence 253 rotates from the standing position shown by the solid line in FIG. .
[0075]
An opening 250c is formed in the upper surface 250b located below the central lower portion 256a of the support member 256. A movable plate 282 whose side surface is bent downward is disposed in the opening 250c so as to place the central lower portion 256a. Boss portions 282b and 264d are formed on the upper portion 282a of the movable plate 282 and the bottom portion 264c of the support plate 264, respectively. Both ends of the coil spring 286 are locked to the boss portions 282b and 264d, respectively, and an upward biasing force is applied to the movable plate 282.
[0076]
As shown in FIG. 17, the support plate 264 is formed in a U-shaped cross-section by bending both side portions 264a and 264b upward. On both side portions 264a and 264b, groove portions 284 and 285 extending in the sheet discharge width direction B are formed to face each other. The groove portions 284 and 285 are adapted to engage with both ends of the shaft 272 located in the slits 274 and 275. The deep portions 284 a and 285 a of the groove portions 284 and 285 are formed in a long hole shape extending in the vertical direction, and restrict the position of the support member 256 that is lifted and biased by the movable plate 282 together with the shaft 272. In FIG. 18, reference numeral 287 denotes a stopper member fixed to the rail 260 that restricts the sliding range of the support plate 264.
[0077]
(Description of operation)
The paper S1 that has finished printing and is discharged toward the paper discharge device 200 is bent into a convex arch shape with its side edges S1b and S1c lowered from the center as shown in FIG. Then, it falls toward the paper discharge tray 250. The sheet S1 falls with the side edges S1b and S1c guided by the inner surfaces of the side fences 252 and 253, and the side edges S1b and S1c are above the center by the correction plates 254 and 255 positioned on the paper discharge tray 250. It is corrected and loaded into a concave arch shape located in the area.
[0078]
When taking out the sheets S1 stacked on the paper discharge tray 250, as shown in FIG. 19, when the side fence 253 is pushed toward the paper discharge tray outer side direction C, the side fence 253 rotates about the shaft 283. To do. When the tip portion 293b of the claw portion 293 tries to exceed the protrusion 273, the bearing portion 291 is placed on the upper surface 250b. Therefore, the lower end inner edge portion 256D of the support member 256 pushes the movable plate 282 and the support member 256 is pivoted. Tilt around 283. As a result, the protrusion 273 is temporarily displaced below the rotation track O ′ to facilitate passage of the claw portion 293. When the claw portion 293 passes over the protrusion 273, the support member 256 is returned to the standing position by the movable plate 282 to which the urging force of the coil spring 286 is applied.
[0079]
When the side fence 253 is rotated in the sheet discharge tray outer side direction C, the support member 256 is held in the upright position, so that the correction plate 255 attached to the support member 256 does not rotate together with the side fence 253. Therefore, even if the side fence 253 is rotated for taking out the paper, the paper S1 loaded on the paper discharge tray 250 and the correction plates 254 and 255 can be taken out without being disturbed, and the correction plate 255 and the side fence 253 are also removed. Unreasonable load is not applied and there is no risk of damage to both. Since the support member 256 that supports the correction plate 255 is disposed on the front surface Z side where the operator is located, the operation of taking out the sheet S1 is facilitated.
[0080]
When the side fence 253 placed at the upright position shown by the solid line in FIG. 18 is pushed in the paper discharge tray inner direction D, the inner surface 290a of the outer portion 290 pushes the convex portion 295 that becomes the first engaging portion. Then, the side fence 253 and the support member 256 are rotated in the sheet discharge tray inner direction D around the shaft 272 of the support member 256 as a rotation center. When the support member 256 is rotated, the movable plate 282 is pushed down against the urging force of the coil spring 286 as indicated by a two-dot chain line in FIG. When the lower end inner edge portion 256D is located downstream of the shaft 272 in the rotation direction, the movable plate 282 is lifted by the urging force of the coil spring 286 to lift the support member 256 and rotate the side fence 253 in the paper discharge tray inner direction D. Encourage movement. This rotation is performed until the correction plate 255 comes into contact with the movable plate 282, and the support member 256 and the side fence 253 occupy the fall position shown by the solid line. Accordingly, when the side fence 253 is rotated in the paper discharge tray inner direction D, the support member 256 also falls on the paper discharge tray 250 together with the side fence 253, so that the storage property is good.
[0081]
The side fence 253 and the support member 256 occupy the fall position shown by the solid line in FIG. 20, and the side fence 253 is rotated from this state toward the standing position. At this time, the shaft 283 that supports the side fence 253 is positioned above the position of the shaft 283 when the side fence 253 is in the upright position. OA and the upper surface 256 of the support member 256 and A are in an interference state. Thus, the engagement state between the protrusion 273 and the inner surface 293a of the claw portion 293 is firmly held, and when the side fence 253 is rotated toward the standing position, the support member 256 is also rotated integrally. Accordingly, the side fence 253 and the support member 256 can be returned to the standing position by one operation, and the operability of the paper discharge device 200 is markedly higher than that of the paper discharge device described in the first and second embodiments. Get better.
[0082]
When the side fence 253 and the support member 256 are integrated, they rotate about the shaft 272, so that the movable plate 282 is shown at the lower end inner edge portion 256D of the support member 256 along with the rotation in the standing direction. As indicated by a two-dot chain line at 20, the coil spring 286 is pushed down against the urging force. When the lower end inner edge portion 256D is located downstream of the shaft 272 in the rotation direction, the movable plate 282 is lifted by the urging force of the coil spring 286 to lift the support member 256, and the rotation of the side fence 253 in the standing direction is promoted. The When the side fence 253 and the support member 256 are rotated in the standing direction, the bearing portion 291 of the support member 256 is in contact with the upper surface 250b of the paper discharge tray 250, and the planar lower surface of the center lower portion 256a is mounted on the movable plate 282. It ends by being placed. At this time, since the rising position of the shaft 272 is restricted by the deep portions 284a and 285a of the grooves 284 and 285, the upward displacement of the support member 256 due to the urging force of the coil spring 286 is suppressed and held in the standing position.
[0083]
In the first and second embodiments, the side fences 53 and 153 and the support members 56 and 156 are configured to be coaxially supported by the shafts 83A and 83B and the shafts 183A and 183B, respectively. As described above, a configuration may be adopted in which both axes are individually provided and are used as individual rotation centers. Further, in the third embodiment, as in the first and second embodiments, the side fence 253 may be coaxially disposed on the shaft 272 provided on the support member 256 and supported rotatably. good.
[0084]
In each embodiment, the correction plates 55, 155, and 255 are rotatably supported by the support members 56, 156, and 256. However, the side fence 53 is provided on the upper surface of the paper discharge trays 50, 155, and 255. , 153 and 253 may be provided separately. The support members described in each embodiment are also provided on the side fences 54, 154, 254 side, and correction plates 54, 154, 254 disposed near the lower portions of the side fences are provided on the support members so as to be rotatable. Alternatively, the correction plates 54, 154, and 254 may be provided on the upper surfaces of the paper discharge trays 50, 155, and 255 separately from the side fences 54, 154, and 254, respectively.
[0085]
【The invention's effect】
Book According to the invention, the correction member is provided on the paper discharge stand side separately from the side fence, so that even if the side fence is rotated toward the outside of the paper discharge stand, the correction member does not rotate together. It is possible to easily perform the operation of taking out aligned sheets while maintaining alignment of both side edges on the sheet discharge table of the sheets after image formation loaded on the table. Since the correction member does not rotate together with the side fence, even if the side fence is tilted when the sheets are stacked, the side fence and the correction member are not loaded with the sheet, and both are not damaged.
[0086]
Book According to the invention, since the support member is held in the upright position even when the side fence is rotated toward the outside of the discharge table, the correction member is moved when the side fence is rotated to the outside of the discharge table. Thus, the alignment of both side edges on the paper discharge tray of the paper after the image formation stacked on the paper discharge tray is better maintained.
[0087]
Book According to the invention, the first engagement portion provided on the support member that rotatably supports the upper end portion of the correction member is engaged with a part of the fence when the side fence is rotated to the paper discharge table. , The support member can be pushed down together with the side fence toward the paper discharge stand, the above In addition to the effect of the present invention, the storage property of the apparatus is improved.
[0088]
Book According to the invention, since the support member also rotates in the same direction when the side fence is rotated from the fall position to the standing position, the side fence and the support member can be erected together, the above In addition to the effects of the present invention, the operability of the apparatus is improved.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram illustrating an example of an image forming apparatus to which the present invention is applied.
FIG. 2 is a partially broken plan view of the paper discharge device according to the first embodiment of the present invention.
FIG. 3 is a front view of the paper discharge apparatus according to the first embodiment viewed from the image forming apparatus side.
FIG. 4 is a partially cutaway side view showing a schematic configuration of a correction member, a support member, and a side fence, which are main parts of the first embodiment.
FIG. 5 is an exploded perspective view showing a configuration of a correction member, a support member, and a side fence, which are main parts of the first embodiment.
FIG. 6 is a partially broken enlarged sectional view showing standing positions of a support member and a side fence in the first embodiment.
FIG. 7 is an enlarged cross-sectional view showing the operation of the side fence in the first embodiment in the outward direction of the paper discharge platform.
FIG. 8 is an enlarged cross-sectional view showing an initial operation of the side fence and the support member in the direction toward the inside of the paper discharge tray in the first embodiment.
FIG. 9 is an enlarged cross-sectional view showing the operation of the side fence and the support member toward the inside of the paper discharge tray and the position of the fall in the first embodiment.
FIG. 10 is a partially broken plan view of a paper discharge device showing a second embodiment of the present invention.
FIG. 11 is a front view of a paper discharge device according to a second embodiment viewed from the image forming apparatus side.
FIG. 12 is an exploded perspective view showing a configuration of a correction member, a support member, and a side fence, which are main parts of a second embodiment.
FIG. 13 is a partially cutaway enlarged cross-sectional view showing the upright position of the support member and the side fence and the operation of the side fence toward the outer side of the paper discharge platform in the second embodiment.
FIG. 14 is an enlarged cross-sectional view showing the side fence and the support member in the second embodiment, the operation toward the inside of the paper discharge tray and the position of the fall;
FIG. 15 is a partially broken plan view of a paper discharge device according to a third embodiment of the present invention.
FIG. 16 is a front view of a paper discharge device according to a third embodiment viewed from the image forming apparatus side.
FIG. 17 is an exploded perspective view showing configurations of a correction member, a support member, and a side fence that are essential parts of the third embodiment.
FIG. 18 is a partially broken enlarged sectional view showing standing positions of a support member and a side fence in the third embodiment.
FIG. 19 is an enlarged cross-sectional view showing the operation of the side fence toward the outer side of the paper discharge stand and the operation of the support member in the third embodiment.
FIG. 20 is an enlarged cross-sectional view showing the side fence and the support member in the third embodiment, the operation toward the inner side of the paper discharge tray, and the fall position.
[Explanation of symbols]
1, 100, 200 Paper discharge device
50, 150, 250 Output tray
51, 151, 251 End fence
53, 153, 253 One side fence
52, 152, 252 Side fence
54, 55 Correction member
154, 155 Correction member
254, 255 Correction member
90 Image forming apparatus
55a, 155a, 255a Correction member upper end
56, 156, 256 Support member
56A, 156B, 295 First engaging portion
273 Second engaging portion
A Paper discharge direction
B Outlet width direction
OA rotation trajectory toward the standing position
S1 Paper after image formation
S1a Paper edge
S1b, S1c Edges on both sides of paper

Claims (4)

A paper discharge device for an image forming apparatus,
A paper discharge tray on which papers after image formation discharged from the image forming apparatus are stacked; an end fence disposed on the downstream side of the paper discharge direction on the paper discharge tray; A pair of side fences arranged so as to be parallel to each other in the paper discharge width direction intersecting the paper discharge direction on the table, and at least one of which is rotatably supported toward the outside of the paper discharge table; A correction member that is disposed near the lower portion of each side fence, and that bends both side edges of the paper upward;
Near the lower portion of the compensation member rotatably supported side fence toward the outside of the discharge table is its upper end portion is rotatably supported by a shaft to a support member provided on the delivery table A paper discharge device. The paper discharge device according to claim 1.
The paper discharge device, wherein the support member is provided so as to be able to rise and fall on the paper discharge table, and is held in an upright state when the side fence is rotated to the outside of the paper discharge table . The paper discharge device according to claim 1 or 2,
The side fence and the support member are both provided so as to be movable up and down toward the paper discharge table, and engage with a part of the side fence when the side fence is rotated toward the paper discharge table. A paper discharge device, wherein a joint portion is formed on the support member . The paper discharge device according to claim 3 .
A second engagement portion that engages with the side fence when the side fence rotates toward the standing position is provided at a portion of the support member that is positioned on the rotation track toward the standing position of the side fence. A paper discharge device characterized by that.

Images