JP5659763B2 - Paper stacking apparatus and image forming apparatus having the same - Google Patents

Description

  The present invention relates to a sheet stacking apparatus connected as a sheet post-processing device such as an image forming apparatus, and an image forming apparatus including the sheet stacking apparatus.

  A paper stacking apparatus connected as a paper post-processing machine such as an image forming apparatus stacks, for example, a maximum of 5000 sheets of copied and printed sheets on a tray housed in the paper stacking apparatus. A tray for loading paper is set on a movable carriage, and after the carriage is stored in a predetermined position in the paper stacking apparatus, a carriage storage door (hereinafter referred to as a front door) of the paper stacking apparatus is used. When closed, only the tray set on the carriage rises to the paper discharge position. Thereafter, when sheets copied and printed by a copying machine or the like are transported to the sheet stacking apparatus, the sheet stacking apparatus stacks the sheets while sorting the sheets in the order in which they are discharged. As a method for sorting the paper sections, there is already known an apparatus that sequentially stacks paper sheets by shifting the paper discharge port sideways.

  In this type of conventional paper stacking device, when a large amount of paper is stacked on the tray, the paper is discharged from the paper discharge port to the tray, and the discharged paper is stopped at the front end stopper in the paper transport direction. Thus, the sheet is pushed to the end fence side, and on the end fence side, there is a sheet drawing means (hereinafter referred to as a paddle) that rotates in synchronization with the sheet discharge roller. The paddle knocks down the paper pushed to the end fence side from the tip stopper to the tray, and draws the paper to the end fence side to perform the operation of aligning the paper transport direction.

  Next, the paper drawn into the end fence side by the paddle is moved by the paper aligning means (hereinafter referred to as jogger) on both sides in the paper width direction moving from the paper width direction to the paper side. Align in the width direction. The paper stacking apparatus needs to perform the above series of paper stacking operations at high speed to ensure high productivity.

  However, if the discharged paper is face curl or back curl, even if the jogger moves from the paper width direction to the paper side, the jogger does not touch the paper and cannot be aligned in the paper width direction, and curl correction is performed. However, if the sheet aligning operation is performed, there is a problem that high productivity cannot be secured.

  In Patent Document 1, for the purpose of improving sheet alignment, a means for correcting the bending of the edge parallel to the sheet conveying direction is provided on the sheet stacking surface of the staple tray, and the correcting means has an obtuse angle at the apex. A convex surface having a shape or an arc shape, and a regulating member which is disposed above the convex surface and is movable in the thickness direction so as to be able to press the sheet bundle stacked on the staple tray. An apparatus is disclosed that is sandwiched between the convex surface and the regulating member and changes in the curl direction of the sheet effective for the sheet aligning operation of the jogger fence.

  However, the point of securing high productivity while aligning sheets has not been solved. Specifically, the staple tray disclosed in Patent Document 1 is disposed on the staple tray, the sheet apex being arranged on the raised convex surface with an obtuse or arcuate shape, and above the convex surface. It consists of a regulating member that can move in the thickness direction so that the sheet bundle can be pressed. In an apparatus that needs to stack a large amount of sheets, the tray is convex and complicated, so both ends of the stacked sheets are in the downward direction. When a large amount of sheets are stacked in that state, the stacked sheets are collapsed, and a large amount of sheets cannot be stacked, and the problem of securing high productivity because curl correction is performed at the time of stapling cannot be solved.

  Accordingly, in the present invention, a paper stacking apparatus capable of performing a paper aligning operation while correcting the curl of the paper and performing a paper aligning operation without reducing productivity, and an image forming apparatus including the same are provided. The purpose is to do.

Of the paper stacking apparatus of the present invention, the one according to claim 1 is
A tray for stacking sheets discharged from the image forming apparatus;
A paper trailing edge fence on the paper trailing edge side;
Paper width direction aligning means capable of moving from the outside to the inside with respect to the paper width direction and shifting the paper by the movement;
Paper pressing means capable of pressing the paper from above to the tray side by the paper width direction aligning means;
In a paper stacking apparatus comprising:
The paper width direction aligning means includes paper aligning means movable in the vertical direction and the paper width direction,
The paper aligning means includes the paper pressing means on the tip side,
The paper pressing means includes a rotatable roller;
While correcting the curl of the sheet while holding the sheet in the tray by the roller when operating the sheet width direction aligning means performs the sheet alignment by the use paper assortment example means,
It is characterized by that.

According to a second aspect of the present invention, in the paper stacking apparatus according to the first aspect, the roller is provided on the paper pressing unit so as to be movable in the vertical direction .

Which according to the claim 3 is the sheet stacking apparatus according to claim 1 or 2, only one end opposite sheet end surface of the sheet is shifted by the operation of the sheet width direction aligning means Tsu by the roller Then , the sheet aligning means is moved while the sheet is pressed from the upper surface side , so that the sheet aligning operation of the other end of the sheet is performed .

According to a fourth aspect of the present invention, in the paper stacking apparatus according to any one of the first to third aspects, the paper width direction aligning means includes at least a paper rear end side paper width direction alignment on the paper rear end fence side. And a sheet trailing edge fence and a sheet width direction aligning means on the leading edge side in the sheet transport direction, and the sheet pressing means included in the sheet width direction aligning means includes the sheet pressing means. After the sheet is discharged from the tray , the sheet pressing operation is performed by the sheet trailing edge side sheet width direction aligning unit side, and then the sheet pressing unit of the sheet leading end side sheet width direction aligning unit is operated. To do.

According to the fifth aspect of the present invention, in the paper stacking apparatus according to any one of the first to fourth aspects, the front end side of the roller of the paper pressing means is made of an elastic body,
Characterized in that pressing the end face in the width direction of the paper in the elastic body.

According to a sixth aspect of the present invention, in the paper stacking apparatus according to any one of the first to fifth aspects, the paper width direction aligning means is provided in a pair in the paper width direction .
Performs the sheet pressing means paper pressing which one comprises of the sheet width direction aligning means, while the sheet width direction aligning means is moved in the sheet width direction on more than that takes to align the paper to be該用paper width direction aligning means The sheet is aligned by the sheet pressing means provided in the other of the above .

An image forming apparatus according to a seventh aspect includes the paper stacking device according to any one of the first to sixth aspects as a post-processing device for paper alignment.

An image forming apparatus according to an eighth aspect is characterized in that a plurality of the paper stacking apparatuses according to any one of the first to sixth aspects are provided as post-processing apparatuses for paper alignment.

  According to the present invention, the sheet aligning operation can be performed while correcting the curl of the sheet, and the sheet aligning operation can be performed without reducing the productivity.

1 is a perspective view conceptually showing an example in which two sheet post-processing devices are connected to an image forming apparatus that is an object of the present invention. The front view which showed the front door of the paper finishing apparatus shown in FIG. The figure which shows the structure which switches the conveyance destination of a paper with the paper post-processing apparatus shown in FIG. Enlarged view of the vicinity of the lower branch claw 120 shown in FIGS. Diagram showing the configuration of the tip alignment mechanism Diagram showing the configuration of the main jogger mechanism The figure which looked at the main jogger used with the paper stacking apparatus concerning this invention from the paper conveyance direction The figure which shows the operation | movement of the main jogger shown in FIG. The figure which shows the operation | movement of the main jogger shown in FIG. The figure which shows the operation | movement of the main jogger shown in FIG. The figure which shows a mode when a paper is discharged by the operation | movement of the main jogger shown in FIG. The figure which shows a mode when a paper is discharged by the operation | movement of the main jogger shown in FIG. The figure which shows the structure of the main jogger in Example 2 of this invention. The figure which shows the operation | movement of the main jogger shown in FIG. The figure which shows the operation | movement of the main jogger shown in FIG. Flow chart of operation of embodiment 2 of the present invention The figure which shows the structure of the main jogger in Example 3 of this invention.

  In the paper stacking apparatus according to the present invention, the rotation of the rotatable roller provided in the paper width direction aligning means causes the paper to be loaded on the paper width direction aligning means on the tray side where the paper discharged from the image forming apparatus is stacked. A sheet pressing unit capable of pressing from the sheet, and aligning the sheet while correcting the curl of the sheet by the roller when the sheet width direction aligning unit is operated. That is, when an image forming sheet such as a copying machine is stacked on a sheet stacking apparatus, even a curled sheet is aligned while pressing the sheet from above the both sides of the sheet. It can be a paper stacking device that can ensure alignment.

  Also, the paper pressing means presses only the top edge of the paper opposite to the shifted side, and the other end moves the paper aligning means so that the paper is present on the pressed side by performing the paper aligning operation. Therefore, it is possible to align the sheets without breaking the stacked sheets.

  Also, by rotating the roller on the front end of the paper width direction aligning means and rotating the roller to the paper side (inside) when paper is ejected, even if the behavior of the paper is disturbed during paper ejection, the roller will rotate. By guiding the paper to the inside of both joggers, the paper behavior during paper discharge can be suppressed, and the paper alignment accuracy can be improved.

  Further, the paper pressing means at the tip of the jogger is made of an elastic body, and the paper pressing means made of this elastic body is pressed while pressing the end face in the paper width direction and pressing the paper end face can speed up the paper pressing. In other words, the end face of the sheet is easily drawn into the jogger, thereby ensuring high productivity while ensuring sheet alignment accuracy.

  Still further, the paper width direction aligning means includes at least the paper rear end side paper width direction aligning means and the paper front end side paper width direction aligning means on the rear end fence side, and the respective paper front end side and paper rear end side paper width direction aligning means. The means has a paper pressing means, and after paper discharge, the paper pressing operation is performed from the paper rear end side paper width direction aligning means side, and then the paper pressing means of the paper front end side paper width direction aligning means is operated. That is, by causing the paper rear end side paper width direction aligning means to operate before the paper pressing means on the paper front end side paper width direction aligning side, the landing on the shift tray at the rear end of the paper is almost the same as the front end side of the paper. In the same way, the paper behavior is stabilized and high productivity can be secured.

  The paper pressing means at the tip of the paper width direction aligning means is also made of an elastic body, and one of the paper width direction aligning means presses the paper, and the other paper width direction aligning means side has a predetermined paper aligning position. In addition, it is possible to realize an inexpensive and simple configuration in which the sheet can be aligned by moving to a position where the sheet can be surely pressed and moving beyond the sheet alignment sheet width.

<Example 1>
FIG. 1 is a perspective view conceptually showing an example in which the same apparatus as the sheet post-processing apparatus B1 and the sheet post-processing apparatus B2 is connected to the image forming apparatus A that is an object of the present invention.
The image forming apparatus A is an apparatus that copies or prints an image to be copied on a sheet and outputs the sheet to the outside of the image forming apparatus A. In the system of FIG. 1, a sheet copied and printed from the image forming apparatus A is discharged to the sheet post-processing apparatus B1. A paper discharge destination is set in advance by an operation unit (not shown) on the image forming apparatus A side. The discharge destination is a proof tray F, a tray in the paper post-processing device B1, or a paper post-processing device. It becomes the tray etc. in B2.

  The operation unit C operates normally when the tray in the paper post-processing device B1 is lowered, or when an input unit for paper jam handling operation for paper jam processing and paper transport is normal, or the paper post-processing device has an error. The operation state of the sheet post-processing apparatus B1 is displayed when the sheet is processed.

  The upper door D opens and closes in order to remove the jammed paper by opening the upper door D when the paper is jammed during the conveyance of the paper in the paper post-processing apparatus B1. The front door E is a door that opens and closes in order to set a carriage with a tray in the paper post-processing apparatus B1. After the paper is loaded, the paper is stacked on the tray, the tray on which the stacked paper is placed is lowered to the top of the carriage, and the carriage on which the tray is placed is opened and closed to move outside the paper post-processing apparatus B1.

  The sheet post-processing apparatus B2 stacks sheets conveyed via the sheet post-processing apparatus B1. Each of the paper post-processing device B1 and the paper post-processing device B2 includes a paper discharge port G for transporting the paper to the downstream paper post-processing device. In the example of FIG. 1, the sheet post-processing apparatus connected downstream of the sheet post-processing apparatus B2 is not displayed. It becomes the mouth for conveyance.

  FIG. 2 is a front view showing the inside of the sheet post-processing apparatus inside B1 with the front door E not shown. As shown in the figure, the carriage 108 is set at a predetermined position, and the horizontally arranged shift tray 102 is raised to the paper discharge position.

  The operation during this period will be described. When the front door E is opened, the carriage 108 is set at a predetermined position in the paper post-processing apparatus B1, and then the front door E is closed. The shift tray 102 on the carriage 108 is raised by the elevator 103. The drive source of the elevator 103 is a tray lifting / lowering motor 107, and the tray lifting / lowering motor 107 is rotated by a control signal from a CPU (not shown) to raise the elevator 103. A pulley 107a is press-fitted into the rotating shaft of the tray lifting / lowering motor 107, and the work amount generated by the rotation of the tray lifting / lowering motor 107 is transmitted via the timing belt 107b. A worm gear 106, a gear 109, a gear 112, a gear 105, and the like are connected to the tip of the timing belt 107b. The gear 105 is connected to the timing belt 104. For example, when the tray lifting / lowering motor 107 rotates forward, force is transmitted to the timing belt 104 by the connected gear 105, and the elevator 103 that lifts and lowers the shift tray 102 connected to the timing belt 104 is raised. On the other hand, when the tray lifting / lowering motor 107 rotates in the reverse direction, the elevator 103 is lowered.

  In FIG. 2, reference numeral 100 denotes a main body of a sheet post-processing apparatus (hereinafter referred to as a stacker), and sheets discharged from the image forming apparatus A or another stacker positioned on the downstream side of the image forming apparatus A are indicated by arrows. It is introduced from the A direction. Generally, a stacker can select an operation mode of a proof discharge mode, a straight discharge mode, and a shift discharge mode by operating an operation unit such as the image forming apparatus A. On the stacker 100 side, as shown in FIGS. 3 and 4, when the lower branch claw 120 faces upward, the shift paper discharge mode is entered, and the paper is discharged to the shift tray 102, and the lower branch claw 120 faces downward and the upper branch claw. When 121 is downward, the proof discharge mode is set, and the sheet is conveyed to the proof tray 101. When the lower branch claw 120 is downward and the upper branch claw 121 is upward, the straight discharge mode is set, and the sheet is discharged to the downstream machine side. The

An outline of the paper stacking apparatus according to the present invention will be described below.
FIG. 3 is a diagram showing a configuration for switching the paper transport destination. The structures of the lower branch claw 120 and the upper branch claw 121 described above are the same. The operation of these branching claws will be described. The driving source of the lower branching claw 120 is a lower branching claw motor (not shown), and the lower branching claw 120 and the lower branching claw motor are also connected means such as gears (not shown). It is connected. The driving source of the upper branching claw 121 is an upper branching claw motor (not shown), and the upper branching claw 121 and the upper branching claw are also connected by a gear or the like.

  FIG. 4 is an enlarged view of the vicinity of the lower branching claw 120. The lower branching claw 120 is turned downward by rotating the lower branching claw motor, and the sheet conveyed from the guide plate 14 is the upper surface of the lower branching claw 120. When the sheet passes the side, the sheet passes through the guide plate 11 and follows the upper conveyance path. On the other hand, when the lower branch claw 120 faces upward, the sheet sent from the guide plate 14 passes through the lower surface side of the lower branch claw 120, so that the sheet follows the guide plate 13 and follows the lower conveyance path. The upper branch claw 121 performs the same operation as that of the lower branch claw 120.

  Next, the paper conveyance path will be described. The stacker of this embodiment can select an operation mode of a proof discharge mode, a straight discharge mode, and a shift discharge mode. The operation of each paper discharge mode will be described below with reference to FIGS. 2 and 3 again.

<Proof delivery>
The proof paper discharge mode is an operation mode in which a sheet is guided and stacked on the proof tray 101 through the sheet conveyance path L1. In FIG. 3, the paper is transported by transport rollers 1 to 4 and discharged to the proof tray 101. The entrance sensor S1 and the proof discharge sensor S4 detect the passage of the sheet. When sheets are stacked on the proof tray 101 and are stacked up to the position of the full detection sensor S5, the job is temporarily stopped until the sheets stacked on the proof tray 101 are removed.

<Straight delivery>
The straight sheet discharge mode is an operation mode in which the sheet is conveyed through the sheet conveyance path L2 to another stacker provided at the subsequent stage of the stacker, a sheet post-processing apparatus having another function, or the like. In FIG. 3, the paper is transported by transport rollers 1 to 10 and is sent to another stacker provided in the subsequent stage or a paper post-processing device having another function. The entrance sensor S1 and the sensors S6 and S7 detect the passage of the sheet.

<Shift paper ejection>
The shift discharge mode is an operation mode in which sheets are discharged and stacked on the shift tray 102 from the direction of arrow D through the sheet conveyance path L3. In FIG. 3, the paper is transported by the transport roller 1 and the shift paper discharge roller 111 and is discharged to the shift tray 102. The entrance sensor S1, the shift sheet discharge sensor S2, and the sensor S3 detect passage of the sheet. In the shift discharge mode, sheets are stacked at different shift positions on the shift tray 102.

Next, the paper alignment mechanism will be described.
FIG. 5 is a diagram showing the configuration of the tip alignment mechanism. The leading edge aligning mechanism 70 shown in FIG. 5 is a mechanism for aligning the leading edge of the sheet discharged onto the shift tray 102, and includes a leading edge stopper 71 whose position can be adjusted in the directions of arrows H1 and H2. The tip stopper 71 is attached to a slider 72, and the slider 72 is slidably guided by a shaft 73 extending in the direction of the arrow H1 as shown. The slider 72 is connected to a belt 76 that is stretched between pulleys 74 and 75. When the belt 76 is moved by the motor 77, the slider 72 moves in the direction of the arrow H1 together with the tip stopper 71, and the position thereof is adjusted. The slider 72 is provided with a shielding plate 78, and when the leading end stopper 71 moves to the home position, the shielding plate 78 is detected by the optical home position sensor S10.

  Next, the sheet pressing means 220F and 220R will be described. In the following description, only the sheet pressing unit 220F will be described, but the same applies to the sheet pressing unit 220R.

  As shown in FIG. 6, the main jogger mechanism unit 200 that is a sheet width direction aligning unit includes stepping motors 201 and 202 that control movement in the width direction (a direction that is perpendicular to the sheet discharge direction and horizontal), and vertical movement. A stepping motor 203 to be controlled, a gear 204 meshing with a gear of the stepping motor 203, a rotating shaft 205 to which the gear 204 is attached, a driving shaft 206 parallel to the rotating shaft, and a gear 204 indicating a rotating state of the rotating shaft 205. It is composed of a filler (not shown) provided and a sensor (not shown) for detecting the filler, and the main joggers 210F and 210R are moved so that the distance between the two is increased or decreased. . The state in which the filler 208 is detected by the sensor that detects the filler is the home position, and the main joggers 210F and 210R are in the lowered position.

  FIG. 7 is a view of the main joggers 210R and 210F used in the paper stacking apparatus according to the present invention as seen from the paper transport direction. The shift tray 102 is provided, and the paper pressing means 222R and 222F are provided at the leading ends of the main joggers 210R and 210F. It is attached. Further, in the illustrated example, the sheet pressing units 222R and 222F are rotatable rollers (hereinafter, may be described with reference numerals 222R and 222F), and the main joggers 210R and 210F are used in the width direction of the sheet P. When the sheets are aligned, that is, when the main joggers 210R and 210F move inward in FIG. 7 and move toward each other, the rollers 222R and 222F rotate while pressing the sheet P downward. Then, as shown in FIG. 8, the roller 222R rotates clockwise, and the roller 222F moves on the curled paper P while rotating counterclockwise. At this time, the rollers 222R and 222F can perform sheet alignment while correcting the curl of the sheet P by pressing the curl of the sheet P toward the shift tray 102. Although not shown in the drawings, the shafts of the rollers 222R and 222F are supported by an elastic body such as a spring and can be moved in the vertical direction so as not to press more than necessary so as not to damage the paper P. is there. Note that the sub jogger 310 (see FIG. 2) performs the same configuration and operation to perform sheet alignment.

  FIG. 9 is a diagram illustrating a state in which sheets are stacked while shifting. In the state of FIG. 9, the paper is loaded on the main jogger 210F side (that is, when the paper P is directly below the main jogger 210F, the main jogger 210F presses the paper P in the D direction). The main jogger 210R side lifts the main jogger 210R slightly upward, and performs the sheet aligning operation without pressing the sheet P from the main jogger 210F side.

  Next, as shown in FIG. 10, when the paper is further stacked and shifted, and the paper is stacked directly below the main jogger 210R, the main jogger 210R presses the paper in the D direction, The main jogger 210F side lifts the main jogger 210F slightly upward, and performs the paper alignment operation without pressing the paper P from the main jogger 210R side.

  FIG. 11 is a diagram illustrating a state when a sheet is discharged. The paper P is discharged from the paper discharge port 223, the roller 222F as the paper pressing means of the main jogger 210F is rotated counterclockwise, and the roller 222R as the paper pressing means of the main jogger 210R is rotated clockwise (drive). The source is a motor (not shown). If the lateral deviation amount in the paper width direction when the paper P is discharged is large, the paper P hits the roller 222F at the tip of the paper pressing means 210F. As shown in FIG. 12, the sheet P that has hit the roller 222F is forcibly guided to the rotation direction side by the rotation of the rollers 222R and 222F. Therefore, when the paper P is discharged, even if the behavior of the paper P is disturbed, the rollers 222R and 222F are rotated, so that the paper P can be dropped to the main joggers 210F and 210R, and the paper alignment operation is performed. Is easier to do.

<Example 2>
The main jogger can be configured as shown in FIG. That is, the rotating bodies 222R and 222F made of an elastic body are formed at the tips of the main joggers 210R and 210F. The rotating direction of the rotating bodies 222R and 222F is a direction forcibly rotating outward as indicated by arrows in FIG. The drive source is a motor (not shown). On the other hand, the sheet pressing means 222F is not rotated. When the paper is conveyed here, the paper is pressed against a downward shift tray (not shown) by the paper pressing means 222R, and the paper is drawn to the main jogger 210R side by rotation (see FIG. 14).

  As shown in FIG. 14, the one end of the paper P is determined by the operation as described above. Next, the main jogger 210F is moved to the paper P side, so that the paper can be aligned, and the state shown in FIG. 15 is obtained.

  In the example of FIG. 13, the rotating bodies 222R and 222F are arranged on both sides of the main joggers 210F and 210R.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG.
In step S1, it is determined whether or not the sheet P is discharged to the shift tray 102. If it is not discharged, the process returns to step S1, and if it is discharged, the process proceeds to step S2.

  In step S <b> 2, immediately after the paper P is completely discharged to the shift tray 102, the leading edge of the paper P is landed on the shift tray 102, and the trailing edge of the paper P is landed on the shift tray 102 later. Therefore, in this embodiment, the rear end of the paper P is forcibly pressed against the shift tray 102 in order to ensure high productivity. Therefore, the paper presser on the main jogger side on the rear end side is activated to press the rear end of the paper against the shift tray 102.

  In step S3, in order to force the front end side of the paper P to be pressed against the shift tray 102, the paper pressing means 210F and 210R on the front end stopper 71 side is activated to press the front end of the paper P against the shift tray 102. Next, in step S4, the front end stopper 71 is activated, and the front end stopper 71 is activated while the paper P is pressed against the shift tray 102 by the paper pressing means 210F and 210R, and the paper P is aligned to the end fence side. .

  In step S5, the main joggers 210F and 210R and the sub jogger 310 are activated while the sheet P is pressed by the sheet pressing units 210F and 210R, and the sheets are aligned in the width direction of the sheet. By operating in this way, the delay of landing on the shift tray 102 at the rear end of the paper P can be forcibly increased, and high productivity can be secured. In this embodiment, the leading end stopper 71 on the main joggers 210F and 210R side is activated. However, even if the sheet pressing means on the main jogger side and the sheet pressing means on the sub jogger 310 side are operated at the same timing, It is sufficient that the behavior is stable, and this timing may be either or both.

<Example 3>
As shown in FIG. 17, the leading end portion of the main jogger 210 </ b> R that is aligned can be formed of an elastic body 223 </ b> R. The elastic body 223R deforms in the left-right direction when stress is applied in the left-right direction. This property is used.

  In this embodiment, if the alignment operation in the sheet width direction is performed based on the main jogger 210R, the sheet is first pressed against the shift tray side under the sheet P by the sheet pressing unit in the main jogger 210R. Next, when the main jogger 210F is moved from the right to the left in the figure, the paper P is curled, and even if the main jogger 210F is operated in accordance with the normal paper width, the paper P cannot be contacted. Therefore, it is configured to move the distance more than the paper width direction and reliably align the paper to the main jogger 210R side. Since one end of the sheet is securely pressed by the sheet pressing means on the main jogger 210R side, the jogger operation may be only a one-side shifting operation.

A: Image forming apparatus B1, B2: Paper post-processing apparatus C: Operation unit D: Upper door E: Front door F: Proof tray G: Paper discharge port 1-10: Conveying rollers 11, 13, 14: Guide plate 70: Tip alignment mechanism 71: Tip stopper 72: Slider 73: Shaft 74, 75: Pulley 76: Belt 77: Motor 78: Shield plate 100: Main body of sheet post-processing device (stacker) 101: Proof tray 102: Shift tray 103: Elevator 104: Timing belt 105, 109, 112: Gear 106: Worm gear 107: Tray lifting motor 107a: Pulley 107b: Timing belt 108: Cart 111: Shift discharge roller 120: Lower branch claw 121: Upper branch claw 200: Main jogger mechanism Part 201, 202, 203: Stepping Over data 204: gear 205: rotary shaft 206: drive shaft 210F, 210R: main jogger 220F, 220R: sheet pressing means (roller)
223: Paper discharge port 223R: Elastic body 310: Sub jogger L1, L2, L3: Sheet conveyance path S1: Entrance sensor S2: Shift discharge sensor S3: Sensor S4: Proof discharge sensor S5: Full detection sensor S6, S7 : Sensor S10: Home position sensor P Paper

Japanese Patent No. 4141113

Claims (8)

A tray for stacking sheets discharged from the image forming apparatus;
A paper trailing edge fence on the paper trailing edge side;
Paper width direction aligning means capable of moving from the outside to the inside with respect to the paper width direction and shifting the paper by the movement;
Paper pressing means capable of pressing the paper from above to the tray side by the paper width direction aligning means;
In a paper stacking apparatus comprising:
The paper width direction aligning means includes paper aligning means movable in the vertical direction and the paper width direction,
The paper aligning means includes the paper pressing means on the tip side,
The paper pressing means includes a rotatable roller;
While correcting the curl of the sheet while holding the sheet in the tray by the roller when operating the sheet width direction aligning means performs the sheet alignment by the use paper assortment example means,
A paper loading device characterized by that. The roller is provided on the paper pressing means so as to be movable in the vertical direction.
The paper stacking apparatus according to claim 1, wherein: Wherein while pressing the sheet by the operation of the sheet width direction aligning means only paper edge face of the shifted end side opposite the paper I'm on the rollers from the upper surface side, by moving operating said sheet alignment means, the paper The sheet stacking apparatus according to claim 1 or 2, wherein a sheet aligning operation of the other end of the sheet is performed . The paper width direction aligning means includes at least a paper rear end side paper width direction aligning means on the paper rear end fence side, and a front paper front end side paper width direction aligning with respect to the paper rear end fence in a paper transport direction. Means, and
The paper pressing means included in the paper width direction aligning means includes the paper pressing means;
After the paper is discharged from the tray, the paper pressing operation is performed by the paper trailing edge side paper width direction aligning means, and then the paper pressing means of the paper leading edge side paper width direction aligning means is operated .
Sheet stacking apparatus according to any one of claim 1, wherein 3 of the. The front end side of the paper pressing means is made of an elastic body than the roller ,
Press the end face in the width direction of the paper with the elastic body ,
The sheet stacking apparatus according to claim 1, wherein the sheet stacking apparatus is provided. A pair of the paper width direction aligning means is provided in the paper width direction ,
The paper pressing means provided in one of the paper width direction aligning means performs paper pressing,
The other paper width direction aligning means is moved in the paper width direction more than required for paper alignment, and the paper pressing means provided in the other of the paper width direction aligning means performs paper alignment .
The paper stacking apparatus according to claim 1, wherein An image forming apparatus comprising the sheet stacking apparatus described as the post-processing apparatus for aligning the paper in any preceding 請 Motomeko 1-6. An image forming apparatus characterized by comprising a plurality of sheet stacking apparatus described as the post-processing apparatus for aligning the paper in any preceding 請 Motomeko 1-6.