JP2614355B2 - Sheet post-processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Field of the Invention The present invention is called a copying machine, a transfer paper or a recording paper discharged from an image forming apparatus such as a copying machine, a printing machine or other recording equipment. The present invention relates to a sheet post-processing apparatus used for distributing and stacking sheet-like members (hereinafter, referred to as sheets), and more particularly, to a sheet post-processing apparatus that sorts, aligns, and staples sheets.

(B) Conventional technology Generally, a sheet post-processing apparatus having an aligning means has an alignment reference wall for regulating an end of a sheet, a swing arm for applying multiple ends of the sheet to the alignment reference wall, and the like, and forms an image. The copy sheets discharged from the apparatus are sequentially applied to the reference wall to align the sheets.

Further, as a means for aligning in a bin in the sheet post-processing apparatus, a swing arm is passed through a part of a plurality of pins stacked substantially perpendicularly to the floor surface, and sheets in all bins are reduced by one. There is also a sheet post-processing apparatus configured to be able to be aligned with two swing arms (alignment rods penetrating the bin). Generally, the aligning rod is configured to perform the circular motion around a certain reference to align the sheet material.

Further, when all the sheets are discharged into the bin and the alignment is completed, the stapling operation starts.However, in order to prevent the sheet from being disturbed when the staple unit enters the sheet, the stapling operation and the stapling operation are performed. The alignment bar presses the end of the stacked sheets to prevent the sheets from being disturbed.

(C) Problems to be Solved by the Invention However, in the above-mentioned conventional sheet post-processing apparatus, the amount of pressing the sheet end of the alignment rod at the time of sheet alignment and the amount of pressing the sheet end at the time of operating the staple unit are described. Are set to the same amount.For example, when a small-sized sheet is aligned, a force acts in an oblique direction with respect to the sheet end, so that when a force of a predetermined pressure or more acts on the sheet end, the number of stacked sheets is small. In such a case, a moment is applied to the stacked sheets, and the sheets are twisted to shift the staple position or to deteriorate the sheet alignment.

In view of the above, an object of the present invention is to provide a sheet post-processing apparatus that stably aligns sheets regardless of sheet size when pressing both ends of the sheets on a bin to align the sheets. It is.

(D) Means for Solving the Problems The present invention has been made in view of the above circumstances, and has a tray for storing sheets, a sheet discharging unit for discharging sheets to the tray, and a sheet storage unit for storing the sheets in the tray. In a sheet post-processing apparatus including an alignment member that aligns sheets and a staple unit that binds the sheets stored and aligned in the tray, when aligning the sheets, a distance between the alignment members is greater than a sheet width of the sheets. And the distance between the alignment members is reduced by a very small amount (a ') with respect to the paper width when the sheet is stapled, and the relationship with the above is as follows: a> a ′ ≧ 0.

(E) Operation Based on the above configuration, when the sheet is discharged to the tray by the sheet discharging means, the sheet is aligned by the alignment member. This alignment is performed by pressing the edge of the sheet with the alignment member. When the sheets are aligned, the distance between the alignment members is smaller than the paper width by a small amount (a), and when stapling, the distance between the alignment members is formed by a small amount (a ') smaller than the paper width. The operation of the alignment member is variably controlled so that (a) and (a ') satisfy a>a'≥0.
This prevents sheet misalignment on the pins and disturbance of the staple position.

(F) Example Hereinafter, a first example of the present invention will be described with reference to the drawings.

In FIG. 1 and FIG. 3, a bin moving type sorter 1 is shown.
(Sheet post-processing apparatus) has a sorter body 7 including a pair of left and right side plates 3, a base 5, a cover 6, and the like.
The sorter 1 accommodates a bin B composed of a group of a large number of bins B _{1 to} B _n and is movable vertically along a pair of guide rails 9 provided on the side plate 3. A unit 2 is provided.

The sorter main body 7 is connected to an image forming apparatus (not shown) arranged on the upstream side (the right side in FIG. 1), and has a carry-in port 10 for carrying in a sheet P discharged from the image forming apparatus; It has 11 pairs of carry-in rollers. A first sheet transport path 12 and an upper discharge roller 13 are provided from the carry-in roller pair 11 to the bin unit 2, and a second sheet transport path 15 and a bin branching downward from the upper discharge roller pair 13 and facing downward. A lower discharge roller pair (sheet discharge means) 16 facing the unit 2 is provided. A deflector 1 is provided at the diverging point between the two sheet conveying paths 12 and 15.
The deflector 17 is selectively displaced to guide the sheet to be discharged from the upper discharge roller 13 to the bin B to the first sheet conveying path 12, and the lower discharge roller pair 16. The sheet to be discharged to bin B is guided to the second sheet conveying path 15.

In the vicinity of the sheet discharge section of the second sheet transport path 15,
A paper sensor 19 for detecting the sheet P is provided. In this embodiment, the paper sensor 19 is constituted by a reed switch with a built-in photo interrupter. However, the same function can be obtained by a transmission sensor. The sheet P discharged from the image forming apparatus (not shown) is detected by an image forming apparatus discharge sensor disposed in the image forming apparatus, and in this embodiment, the passage time of the sheet P and the next Sheet P
Can be measured, and an arithmetic circuit incorporated in the main body of the image forming apparatus issues a signal for discharging the sheet P and a signal for the sheet interval to the microcomputer in the bin unit 2. The signal is transmitted.

As shown in FIGS. 3 and 4, the bin unit 2 has a pair of bin support plates 20 having a frame structure at the front and rear. A bin slider 21 is attached to the tip of the bin support 20, and the bin support plate 20 and the bin slider 21
Is fixed to a bin cover 22. This bin cover 22
, The matching reference wall 23 is fixed from to the bin support plate 20. Furthermore, the notch 25 formed in each bin B respectively
An alignment rod (alignment member) 26 penetrates through the entire bin B, and the alignment rod 26 is aligned with a center rod 29 pivotally supported by a pair of alignment arms 27 above and below the alignment rod 26. The bar 26 is swingable. The sheets P stored in the bins B are pressed against the alignment reference wall 23 by the swing of the alignment rod 26 and aligned.

Each of the bins B accommodated in the bin unit 2 is movably mounted at its free end in a comb-shaped groove (not shown) of the bin slider 21. As shown in detail in FIG. 5, bins 30 are fixedly provided on the left and right portions, respectively. This bin 30
It penetrates the slits 31 provided in the above-mentioned left and right bin support plates 20, respectively.
A trunnion 33 is rotatably mounted via a ring 32.

The trunnions 33 are fitted into the guide rails 9 so that the trunnions 33 of the bins B are stacked, and the lowermost trunnions 33 abut against the lower guide rollers 35 rotatably supported by the bin support plate 20, Also the highest trunnion 33
The upper guide roller 36 rotatably supported by the bin support plate 20
, Each bin B is supported by the bin unit 2 such that the bin interval is kept constant and equal to the outer diameter of the trunnion 33.

As shown in FIG. 1, the bin unit 2 can move up and down along the guide rail 9 with the upper guide roller 36 and the lower guide roller 35 fitted in the guide rail 9. The metal fitting 37 fixed to the bin unit 2
A tension spring 39 is stretched between the and the side plate 3, and acts to lift the bin unit 2 by its elasticity.

A cam shaft holder 40 is disposed at a position facing the lower discharge roller pair 16 supported by the left and right side plates 3 as shown in FIGS. 3 and 6, respectively. A lead camshaft 42 is rotatably disposed between the holder 40 and the base plate 5 via a bearing 41. A pair of left and right lead cams (spiral cam means) 43a and 43b each having a helical spiral cam surface are fixed above the lead cam shafts 42 provided on the left and right, respectively.

In FIG. 6 and FIG. 10, a shift motor 45 that can rotate forward and reverse is fixed to one side plate 3 and its output shaft is
A bevel gear 46b integral with the pulley 46a is fixed to one end of 45a, and the pulley 46a is connected via a belt 47 to a pulley 49 fixed to the lead cam shaft 42 of the lead cam 43b. A bevel gear 51 fixed to one end of the through shaft 50 meshes with the bevel gear 46b, and a bevel gear 52 fixed to the other end of the through shaft 50 is integrated with a pulley 53 (not shown). Bevel gear is meshed. The pulley 53 is connected via a belt 55 to a pulley 53 fixed to the lead cam shaft 42 of the other lead cam 43a as shown in FIG.
When the shift motor 45 rotates forward and backward by the drive transmission system configured as described above, the lead cams 43a and 43b rotate in the direction of the arrow in FIG. 10 or in the direction opposite thereto.

The other end (the sixth shaft) is connected to the output shaft 45a of the shift motor 45.
A clock disk 56 is fixed to the lower end of the shift plate 45, and the number of rotations of the shift motor 45, that is, the number of rotations of the lead cams 43a and 43b is read by an interrupter 59 held on one side plate 3 via a sensor holder 57. It is possible to freely control the rotation speed of the lead cams 43a and 43b together with the lead cam control circuit in the microcomputer of the sorter 1.

Further, a pair of flags 61 and 62 for detecting the positions of the lead cams 43a and 43b are fixed below the lead cam 43b and coaxial with the lead cam shaft 42 shown in FIG. FIG. 8 and FIG. 8 are enlarged views thereof. 7 and 8, interrupters 63 and 65 for reading the flags 61 and 62 are held by a holder 66 fixed to the side plate 3.

The interrupters 63 and 65 have the same flag angle, but are arranged with a phase shift by a predetermined amount. ON / O of two interrupters 63 and 65 due to this phase shift
The FF determines whether the bin B is the home position in the ascending direction or the home position in the descending direction, as described later.

The lead cams 43a and 43b have a parallel portion (about 180 °) as described later, and determine the phase shift of the flags 61 and 62 corresponding to the parallel portion. Incidentally, the phases of the flags 61 and 62 are shifted by a predetermined angle (approximately 30 °).
The positions of the lead cams 43a and 43b are determined by ON / OFF of 3,65.

Next, the operation of the bin B determined by the shapes of the lead cams 43a and 43b and the trunnions (bin rollers) 33 engaging with the shapes will be described.

FIG. 9 (a) shows the left lead cam 43a and trunnion 3
FIG. 10 (b) is a diagram showing the relationship with the right lead cam 43b and the trunnion 33, respectively, and FIG. 11 is a diagram showing the drive transmission system of the lead cams 43a and 43b. FIG.

As shown in FIGS. 9 and 10, respectively, the lead cam
43a, 43b, in the present embodiment, is formed so that the helical direction is reversed so that the rotation direction is reversed,
Both have mirror symmetry with each other. Further, in the present embodiment, the two-row type is configured so that the space between the bins B can be expanded at two places of the expanding portions X and X '. It is due to the provision of 67,
If the function is only for the sorter, the expanding portion may be only the expanding portion X into which the sheet P is carried.

When the lead cams 43a and 43b rotate in the directions indicated by the arrows and vice versa by the drive of the shift motor 45, the trunnions 33 are pressed by the grooves in the lead cams 43a and 43b and are guided by the guide rail 9 to rise or fall. .
The reason why the bent portion is provided in a part of the guide rail 9 shown in FIG. 9 is that the bin B is moved in the front-rear direction (the sheet advancing direction) because the sorter 1 in this embodiment has the sheet closing mechanism 67. This is for displacing, and does not limit the configuration of the present invention at all.

In FIG. 11A, the lead cam 43 according to the present embodiment is shown.
FIG. 11 (b) shows the cam diagram of the conventional lead cam, and FIG. 11 (b) shows the cam diagram of the conventional lead cam. The hatched portions in the drawing indicate the cam grooves of the lead cam 43a. 11 (a) and 11 (b) show the left side (left side in the traveling direction of the sheet P), but the cam diagram of the other lead cam 43b is mirror symmetric between mirrors. . The cam diagram shows a range of 0 ° to 360 ° and is a cam diagram in the present embodiment, so that it is a two-line cam diagram.

The positions of the trunnions 33 in the grooves of the lead cam 43a are indicated by reference numerals 33a, 33b, and 33c, respectively. Also, the first
1 indicates a parallel portion of the lead cam 43a that is substantially parallel to the lead cam 43a. In this embodiment, a parallel portion of approximately 180 ° is set. In the above cam diagram, when the lead cam 43a moves rightward, that is, when the lead cam 43a rotates in the direction of the arrow in FIG.
3 moves relatively to the left), bin B rises, and when lead cam 43a moves to the left (trunnion 33 moves relatively to the right), bin B lowers. The parallel portion H indicates the sheet discharge position of the lead cam 43a, and the inclined portion K indicates the shift position.

Here, the sheet P in FIG.
When the trunnion 33 is lifted, the home position when the trunnion 33 rises is set to 33x, and the trunnion 33 is set to the home position. The home position in the direction in which 33 descends is 33y. In this embodiment, the phases of the home position 33x and the home position 33y are shifted by 180 ° as shown in FIG. 11 (a).
The positions indicated by 33x and 33y of the lead cam 43a correspond to the flag areas in FIG. 8, respectively.

Lead cam 43 (43a, 43b) in the embodiment 2 [pi (rad) one round of the parallel portion H and theta (rad), if the time that the sheet P has passed the lower discharge roller pair 16 and t _1, the lead cam The rotation speed R ₁ (rpm) of 43 can be expressed by the following equation (1).

Therefore, as the discharge time of the sheet P is shorter, the rotation speed (process speed) of the lead cam 43 increases.

Then, the time interval for each sheet P when the sheet P is discharged continuously from the image forming apparatus (sheet interval) When t _2,
In order to make one rotation of the lead cam 43 equal to the interval between the discharge of the sheet P and the paper, the rotation speed R ₂ (rpm) of the lead cam 43 in the remaining 2π−θ (the inclined portion of the lead cam 43a) And must be. Where R ₁ = R ₂
If the angle θ of the parallel portion H of the lead cam 43 is set, the rotational speed of the lead cam 43 is theoretically constant at the time of sheet ejection and at the time of sheet separation, and the sheet P is rotated while the lead cam 43 is rotating.
In bin B and bin-shifted. That is, a series of sheet sorting functions of the sheets P discharged from the image forming apparatus can be achieved while the rotation of the lead cam 43 is constant.

Further, when the image forming apparatus is a high-speed machine, t ₂
Therefore, even if the rotational speed of the lead cam 43 is not constant, if the two-speed control of R ₁ → R ₂ is performed, the lead cam 43
Even if the rotation speed of 43 changes, it does not stop. As a result, the impact noise generated by the inertia of the bin unit due to the rotation and stoppage of the lead cam in this type of bin movable sorter up to now is eliminated in the present embodiment, and the noise reduction design is achieved. It becomes possible.

Still another feature of the present embodiment is that it is suitable for a higher-speed copying machine (high productivity), and the set angle θ of the parallel portion H of the lead cam 43 is changed to some extent (for example, 180 ° or more), the rotation angle of the lead cam 43 between the sheets becomes smaller, so even if the rotation speed of the lead cam 43 is considerably reduced,
It can support high-speed machines (high productivity) more than conventional copiers.

Furthermore, since the ON / OFF control (moving and stopping operations) of the bin unit 2 having a large mass is eliminated, the loss of power consumption of the copying machine can be reduced.

The lead cam flag described in this embodiment is a flag
Although two components 61 and 62 are described, one flag 290 and one interrupter 291 are provided as shown in FIGS. 31 and 32, for example, in accordance with the parallel portion H of the lead cams 43a and 43b. It is also possible with a configuration.

In this case, whether bin B is the home position in the ascending direction,
The home position in the descending direction can be determined if stored in a microcomputer (not shown) after the operation is completed.
When the position information of the lead cams 43a and 43b is cleared by turning off, the lead cams 43a and 43b are slightly rotated (initializing) and the interrupter 301 is turned on (ON) or turned off (O
N) By recognizing whether it remains ON, the positions of the lead cams 43a and 43b can be determined. At this time, if the position detection sensor of the bin unit 2 is ON, it is determined whether or not the home position of the bin unit 2 is reached. You can make a judgment.

Next, the stapler (sheet closing mechanism) according to the present embodiment will be described in detail.

FIG. 2 shows a top view of the staple. The seat closing mechanism 67 is configured to be able to move forward and backward with respect to the bin B of the sorter 1. The twelfth explanation of this configuration in more detail
FIG. 13 and FIG.

A stapler 67 shown by a two-dot chain line rectangle in the drawing is a general electric stapler, and supplies a needle cartridge portion 69 capable of storing a large number of needles and needles sequentially from the needle cartridge portion 69 to the needle driving portion. And a staple driving portion 67b which drives the fed staple into the sheet P or the like to enable a binding operation.

The needle driving portion 67b has a center of rotation 67c, and the stapler
The upper unit 67 (the upper unit is movable in the Y direction in FIG. 13) and the lower unit sandwich the sheet P with each other to perform stapling. Also, stapler
A stapler cover 70 covering a motor and a drive system (not shown) is a stapler attachment sheet metal 71.
The stapler attachment sheet metal 71 fixes the stapler 67 body with screws.

Also, the stapler attachment sheet metal 71
It is screwed and fixed to a moving table 72 that reciprocates 67.
A moving guide 73 and a slider roller 75 are fixed to a lower portion of the moving table 72. A drive from a stapler driving motor (not shown) is driven by a gear (1) 76, a gear (2) 77, and a link gear.
Communicate to 79. The link gear 79 has a protrusion 79a that engages with the roller slider 75, and has a configuration that can rotate in the direction A in the figure.

Also, a part of the link gear 79 has two micro switch actuating portions 79b at opposing positions, and the link gear 79 rotates half a turn and the projection 79a rotates 180 °. It is possible to move a distance corresponding to the rotation diameter of the projection 79a. The moving guide 73 engages with a guide shaft 81 on which a stapler fixing metal plate 80 is mounted, and enables the moving table 72 on which the stapler 67 is mounted to move in parallel with the link gear 79.

The rotation detection microswitch 82 detects each half rotation of the link gear 79, and the staple unit position detection microswitch 83 engages with a cam 85 mounted on the side of the moving base 72, and the staple unit is moved to the bin. It is configured to turn off at the retreat position 67X retracted from B, and to turn on at other times.

At one end of the moving table 72, there is provided a transparent paper sensor capable of sensing the sheet P in a U-shape from upper and lower protrusions, and can detect the sheet P when the staple unit reaches the sheet binding position 67Y. Configuration. The staple unit and the unit that enables the unit to reciprocate are fixed to the side plate 3.

The taper guide 87 has a taper shape at the front end side of the sheet entrance, so that when the staple unit advances onto the sheet P (the sheet binding position 67Y), the front end of the sheet P is not turned or shifted. The taper guide 87 is rotatable about a rotation center 87a, and the rear end 87b is normally attached counterclockwise by a spring means (not shown) so as to actuate the stapler safety micro switch 89. It is being rushed.

Then, for example, when the staple unit has advanced onto the sheet P (the sheet binding position 67Y), the foreign matter (for example, the operator's hand) or the sheet P having a thickness greater than the closing ability of the stapler 67 has been located on the bin B. In this case, the bin B and the lower taper guide 90 are used as fixed seats, and a moment is generated that pushes up the tip of the upper taper guide 87, and the upper taper guide 87 rotates clockwise around the rotation center 87a. As a result, the safety micro switch 89 is turned off, and the power supply to the stapler 67 is cut off by hardware.

The center of rotation is 91a above the stapler cover 70.
Has an interlock arm 91 included therein. The interlock arm 91 is normally biased in a counterclockwise direction by a spring (not shown) or the like.

Above the interlock arm 91, an actuating plate 92 provided on the side plate 3 is arranged. With the reciprocation of the staple unit in the X direction in FIG. 13, the staple unit is moved to the sheet binding position 67Y. At this time, the interlock arm 91 is at the position shown by the solid line, and the retract position 67X
When the position is in the position, the interlock arm 91 abuts on the tip of the actuating plate 92, and the lower part of the arm of the interlock arm 91 rotates to the upper part of the needle cartridge part 69 of the stapler 67 as shown by reference numeral 85X. It can be pushed down.

 Next, needle detection of the stapler 67 will be described.

Reference numeral 93 shown by a two-dot chain line in FIG. 13 is a reflection type needle sensor. When the rear end of the sheet-like needle passes through the reflection type needle sensor 93, the absence of the needle is detected. At this time, a sheet-like needle still remains to some extent upstream of the sensor 93, and the tip of the needle driving side is held on the stapler 67 side. When the absence of the needle is detected, the manual staple button 95
Blinks or displays a message indicating that there is no needle on an image forming apparatus display (not shown) (not shown) to urge the user to change the needle. In this embodiment, the stapling operation is prohibited when the reflection type needle sensor 93 detects that there is no needle.

 Next, replacement of the needle cartridge will be described.

FIG. 14 is a schematic perspective view of a staple unit of the sheet post-processing apparatus according to the present embodiment. In the figure, the staple unit is provided with a door 96 that can be opened and closed for stapler maintenance and needle cartridge replacement. The lower portion of the door 96 is a projection for door switch actuation, and reference numeral 96b is a magnet catch for holding the door. With this configuration, when the door 96 is closed in the direction of the arrow O, the joint switch 99 is turned on to allow the sorter 1 to operate.

In this embodiment, the reflection type needle sensor 93 of the stapler 67 is used.
When the door 96 is opened while the stapler 67 detects that there is a needle, the stapler 67 keeps the stopped state at the retreat position 67X. At this time, the interlock arm 91 is in a state indicated by reference numeral 91X, that is, a state in which the lower portion of the interlock arm 91 is rotated and pushed up by the needle cartridge 69 of the stapler 67.

In order to take out the needle cartridge 69 from the stapler 67, the rear end of the needle cartridge 69 is lifted upward as shown by reference numeral Z in FIG.
Since it is configured to pull out after riding over d, the state of the interlock arm 91 is 91X,
That is, when the staple unit is in the 67X state (when the staple unit's reflective needle sensor 93 detects the presence of a needle), the needle cartridge 69 is interlocked so that it cannot be removed from the stapler 67. I have.

When the reflective needle sensor 93 detects that there is no needle,
When the joint is opened (when the joint switch 99 is OFF), software is set so that the staple unit automatically stops in the direction of reference numeral 67Y (see FIG. 2). (See FIG. 2).

When the staple unit is in the above-described state, the interlock arm 91 is moved to the staple cartridge as shown by a solid line in FIG.
The needle cartridge 69 is retracted from the upper portion of the staple unit 69, and the rear end of the staple cartridge 69 is operated as shown by the arrow Z in FIG. 13, so that the staple unit 69 is detached from the staple unit. Then, when the door 96 is closed (the joint switch 99 is turned ON), the staple unit returns to the retreat position 67X (see FIG. 2) and enters the standby state.

In the present embodiment, when the door 96 is opened, the staple unit remains at the retreat position 67X without moving the staple unit with the staples. Conversely, the staple unit is moved to the sheet binding position 67Y with the staples. , Interlock arm 9
1 is set to the state of 91X, and when there is no staple, the staple unit remains stopped and the interlock arm 91
Of course, the needle cartridge 69 can be locked, and an interlock arm that can be freely turned on and off by driving a solenoid, a motor, or the like can also exert the same effect.

Further, as for the staple replacement, as described above, when the trailing end of the staple in the stapler exceeds the reflective needle sensor 93 in FIG. 13, the absence of the staple is detected, and the system is temporarily stopped. At this time, the remaining number of staples is automatically made after the staple supply.

 Next, the alignment of the sheet P will be described.

FIG. 16 shows a view of the bin unit 2 seen from above. The alignment reference wall 23 serves as an abutment reference for the sheet P, and the alignment rod 26 can move in an arc around the center rod 29.

FIG. 15 shows a drive system arranged at the lowermost part of the matching rod 26. In the figure, reference numeral 300 denotes a lower alignment arm 300 which holds an alignment rod 26 together with an upper alignment arm 27.
Reference numeral 301 denotes a leaf spring 301 in which the alignment rod 26 is aligned with the alignment arms 27 and 3.
15 can be deformed in the direction of moving to the right in FIG.

A part of the lower alignment arm 300
A fan-shaped gear 301a for achieving the 00 drive and a flag 301b for detecting the home position of the lower alignment arm 300 are integrally formed and provided. Reference numeral 302 denotes a home position sensor, 303 denotes a stepping motor as a driving source, and 305 denotes an idle gear. Reference numeral 306 denotes a bin support plate 2.
0 and a torsion coil spring hooked between the lower arm 300 and always restricts the play between the sector gear 301a and the idle gear 305 in one direction and transmits the forward or reverse drive from the stepping motor 303 or forward or reverse. Vibration corresponding to backlash play when switching between reverse and reverse rotation is prevented, and operating noise is reduced. Further, by making the idle gear 305 meshing with the stepping motor gear 303a a relatively soft resin (a costraco system having a rubber characteristic, for example, Hightrel), vibration noise (for example, a rattling sound peculiar to the stepping motor) is reduced. This is confirmed on the solid line.

Next, the positions of the alignment bar 26 and the alignment reference wall 23 during sheet P alignment will be described.

First, let x be the width of the sheet P. For example, in A4, 29
7mm and 210mm for A4R. In the present embodiment, the sheet size signal is determined by the paper size signal of the image forming apparatus. Next, X is also the distance between the alignment reference wall 23 and the alignment bar 26 at the time of sheet P alignment.

Symbol a indicates the amount of pushing of the sheet P by the alignment rod 26 (paper width-alignment width). Normally, the sheet width of the sheet P is constant depending on its size. However, the apparent width of the sheet P may be slightly smaller depending on the irregularity of the normal state and the curl state of the copy sheet. Occasionally, the alignment rod 26 is moved to a position smaller than the paper width. In the present embodiment, a is set so that a = δCOSθ (1). Here, θ is the angle of the alignment rod 26 with respect to the home position 26a (the angle when the end of the alignment rod 26 comes to the sheet end). Δ is a leaf spring
This is the amount of deflection in the Q direction 301 in FIG. 15 of FIG.

In this embodiment, the pressing force of the sheet P by the alignment rod 26 is the same for each size of the sheet P. This is because when the number of stacked sheets is small,
When the pressing force of the alignment bar 26 against 00 becomes stronger than a predetermined value,
This is because the portion of the sheet that comes into contact with the alignment rod 26 at the end of the sheet is pushed away. When the pressing force of the alignment bar 26 is near a predetermined value, an appropriate pressing effect for aligning the sheet P is exhibited, and the alignment of the sheet P is improved.

 The amount of deflection δ of the leaf spring 301 is expressed by the following equation.

Here, W is the pressing force, l is the length of the leaf spring 301, b is the width of the leaf spring 301, h is the plate pressure of the leaf spring 301, and E is the longitudinal elastic modulus (material of the leaf spring).

As described above, in this embodiment, the value of a when the sheet P of A4 size (standard size) is aligned is experimentally about 1.5 mm. According to the expression (1), in the case of a size smaller than the A4 size, the value of a becomes smaller as shown in the expression (1) (however, the pressing force is constant; W).

Further, the inclination angle Q of the alignment rod 26 according to the size of the sheet P
And ask for Can be represented by

Here, π is the pi, L ₀ is the matching reference wall 23 and the center rod 29
The distance between them, r, is the radius of the alignment rod 26.

Therefore, θ for each size is calculated by equation (3). The lower arm 300 is aligned with the stepping motor 303 by θ.
By inputting a pulse that operates only _one , the matching rod
26 moves are achieved. Further, since the distance X between the end of the alignment rod 26 and the alignment reference wall 23 when aligning the sheet P is X = x−a (4), the value of X is determined by a = δCOSθ.

When θ ₁ is further obtained, the stepping motor is finally
Number of pulses 303 is determined from theta ₁ information. That is, as the width of the sheet P becomes smaller, the pushing amount of the aligning rod 26 becomes smaller. When the arc type aligning method as in the present embodiment is employed, as shown by the arrow in FIG. In the case of the size (A4, A3, etc.), the direction of pressing the sheet P of the alignment rod 26 is substantially the R direction, which is substantially perpendicular to the alignment reference wall 23, and a moment is applied to the stacked sheet P by the pressing force. Since the pressure is not applied, the loadability of the sheets P is not disturbed by the pressing force at the time of alignment.

However, in the case of a small width (A4R, B5R, etc.), the pressing direction of the sheet P by the alignment rod 26 is substantially the S direction and has a certain angle with respect to the alignment reference wall 23, so that the stacked sheet P rotates. Force in the direction of Here, if the pressing amount a exceeds a predetermined value and increases, the function of deteriorating the alignment of the sheet P at the time of alignment is obtained.

In the present embodiment, the description has been given of the arc-type alignment. However, the above-described predetermined amount of pressing a can be adjusted by the alignment rod or the alignment plate that moves in a direction perpendicular to the alignment reference wall. The same is needed for improvement.
The pressing amount a during the parallel movement of the alignment bar does not need to be particularly changed by changing the paper width.

Next, the movement of the alignment bar 26 when the sheet P is stapled will be described.

After the sheet alignment is completed, in this embodiment, the copy paper P
After all the sheets are discharged to the sorter 1, the stapling can be automatically performed. However, at the time of stapling, the stapling unit is moved from the retreat position 67X to the sheet binding position 6 in FIG.
It moves in the order of 7Y → (staple operation) → evacuation position 67X,
Staple unit retracted from position 67X to sheet binding position 67Y
During the operation, the alignment bar 26 presses the stacked sheets P between the alignment reference walls 23.

That is, when the staple unit enters between the stacked sheets P, the sheet P contacts (or may not contact) between the upper unit and the lower unit of the stapler 67 via the upper taper guide 87 and the lower taper guide 90. Therefore, in order to improve the alignment of the sheet P at the time of the entering process, the alignment bar 26 is in a pressed state on the stacked sheets P at the time of the entering process of the staple unit.

In the present embodiment, since the stacked sheet P is slightly moved by the pressing force (direction) of the alignment rod 26 and the variation in the position of the staple at the time of stapling is suppressed to the minimum, the stapling amount a at the time of the above-described stapling is reduced. A controllable circuit is provided so that a ≧ a ′ (a ′ ≒ 0) (6) where a is the pressing amount a ′.

The above configuration is particularly necessary for an arc-type matching system. At the time of sheet alignment, when a small number of sheets P are present on the bin B, for example, about 20 sheets, the waist in the width direction of the sheet P
The sheet P itself, which does not lose the spring force of the leaf spring 301, bends and stretches by the pressing force of the alignment rod 26, and the entire paper is twisted by the moment due to the force in the S direction shown in FIG.

However, when the number of sheets becomes large after 20 sheets or more, if a certain amount of pressing force is not applied to the sheet P, a small amount of misalignment may occur. This is, in the case of this embodiment,
Sheets P loaded in many bins (10 bins or more)
Since the alignment is performed by the same alignment rod 26, the parallelism from the upper part to the lower part of the alignment rod 26 with respect to the alignment reference wall 23, the difference in the width of the sheet itself (common difference), the curl state of the sheet P in each bin, etc. In consideration of the above, the pressing amount a is required at the time of sheet alignment.

As described above, when stapling, in order to suppress the variation in the binding position especially when a small number of sheets are narrow (for example, A4R, B5R), the amount of pushing is minimized to prevent the sheet P from being disturbed when entering the staple unit. a 'is required.

As another conceivable method, when the number of sheets P is small, the pressing amount a is reduced, and when the number of sheets P exceeds a certain number, the certain amount is automatically determined based on the number signal of the main body or the sorter. S.) Increasing the amount of alignment pushing is also significant in improving alignment. In the present embodiment, the certain number of sheets is the number of sheets when the elasticity of the alignment arm and the leaf spring and the waist of the entire stacked sheet are at the same level. In addition, the above-described configuration can be applied to the parallel-movement type alignment unit.

Next, a series of operations in which the sheet P is carried into the sorter 1 from the image forming apparatus, discharged to the bin B, the bin B is shifted, and the sheet P is aligned and stapled will be described.

First, a sheet P discharged from an image forming apparatus (not shown) to which the sorter 1 (see FIG.
It is carried in from bin 10 and discharged to bin B via carry-in roller pair 11 and deflector 17. At the time of discharging the sheet P, the sheet P is discharged from the upper discharge roller pair 13 to the bin B at the time of non-sorting, and the second sheet conveying path 15 at the time of sorting.
Is discharged from the lower discharge roller pair 16 to the bin B.

Here, a passage time of the sheet P and an interval (inter-sheet distance) between the sheet P and the next sheet P are measured based on a sheet discharge signal from an image forming apparatus (not shown), and the measured information is stored in the bin unit 2. Communicate to microcomputer.

If the detection time of the sheet P exceeds a predetermined time due to a sheet conveyance failure or the like, or if the next sheet P cannot be detected within the predetermined time, a stagnant / delay jam similar to the normal sensor is performed. A signal is issued to the microcomputer of the image forming apparatus main body, and the entire system in the jam state is stopped.

The microcomputer in the sorter 1 that has measured the passing time of the sheet P and the sheet interval and received the information recognizes the sheet P ejection time (time during which the sheet P is ejected into the sorter 1) and the sheet interval. . Then, the rotational speed of the lead cam 43 and the position of the lead cam 43 are controlled based on the data. The position control of the lead cam 43a is performed by synchronizing the discharge timing of the sheet P into the bin B and the start timing of the parallel portion H of the lead cam 43.

As described above, the speed of the lead cam 43 can be recognized by the clock disk 56 (see FIG. 6) and the interrupter 59 provided on the output shaft 45a of the shift motor 45 that drives the lead cam 43, and The flags 61 and 62 (see FIGS. 7 and 8) provided below the lead cam shaft 42 make it possible to recognize one end and the other end of the substantially parallel portion H of the lead cam 43.

For example, when sorting bin units 2 in the ascending direction,
11 When the trunnion 33 of the bin B corresponding to the home position 33x shown in FIG. 11A comes, the discharge of the sheet P is started and the discharge of the sheet P is started while the trunnion 33 moves from the home position 33x to the position 33y. The number of revolutions of the lead cam may be set so as to be completed.

Further, the bin unit 2 is bin-shifted between the positions 33y and 33z. Since the time between sheets is recognized by the information, the trunnion 33 performs the rotation from 33y to 33z within the time between sheets. I just need. At that time, the next bin B has arrived at the position 33x and accepts the next sheet P. This operation is repeated for each bin B.

When the bin unit 2 is sorted in the descending direction, the discharge of the sheet P is started when the trunnion 33 of the bin B corresponding to the discharge comes to the position 33y, and the discharge is completed during the position 33x. The trunnion 33 is rotated from 33x to 33w between the sheets P to be discharged, and the above operation is repeated as if the next bin B has reached the receiving port 33y.

During the discharge of the sheet P, error fluctuations such as the process speed of the image forming apparatus main body and the sheet interval are transferred from the image forming apparatus main body to the bin unit 2 as needed, so that the speed control of the trunnion 33 is always new information. Feedback control is applied.

With the configuration of the sorter 1 as described above, even if the sorter 1 is connected to a different model having a different process speed and a different sheet between papers, the individual image forming apparatus can perform the best, not only in response to the difference in the discharge time depending on the size of the sheet P. Lead cam control becomes possible, and it is possible to stably cope with a wide range of sorters (sheet post-processing devices) 1.

 Next, sheet ejection and sheet alignment will be described.

The sheet P discharged from the image forming apparatus and conveyed from the entrance 10 is discharged by the lower discharge roller pair 16 during sorting.

The bin B being discharged during sheet discharge is generally stopped with respect to the lower discharge roller pair 16 (at this time, the lead cams 42a and 42b are rotating and the trunnion 33 is passing through the parallel portion). Bin B that has finished storing the sheet after discharging the sheet
In the case of the forward sort (the bin unit 2 receives the sheet while moving from the bottom to the top), the sheet discharge signal is detected by the paper sensor 19, and the rear end of the sheet P (the sheet and the feeding direction) is passes through the nip of the roller pair 16, the lower portion of the bin B completing the stacking of the sheet P after the predetermined time t ₁ is stopped at a position opposed to the lower discharge roller pair 16 increases.

The bin B _a receiving the sheet P (see FIG. 9)
Lead cams 42a, rises at the inclined portion K of the 42b, the space C between the top of the bottle B in this case bin B _b is the state shown in Figure 9 with the bottle B _a is completed shift (a) Before becoming a matching rod
26 presses the discharged sheet P to abut the sheet P against the alignment reference wall 23 to complete the alignment.

After the shift is completely completed, the ninth match timing is set.
As shown in FIG. 9A, when the space between the bin _Bb and the upper bin B becomes C (the most contracted state), when the number of sheets P already stacked is small, the space between the bins is stacked. It is possible to hold down the discharged sheet P because it is large with respect to the thickness of the sheet P, but when the sheet P is to be stacked in a larger amount, especially when the curl of the sheet P is large,
The stacking height of the sheets P may be larger than the interval of C.

At this time, the discharged sheet P, remains not pressed by the aligning rod 26, at the state of Figure 9 (a), so that the entire sheet P stacked by the bin B and the bin B _b is pressed The sheet P already aligned at this time
However, as described above, the sheet P immediately after being discharged (the sheet P not yet pressed against the alignment reference wall 23) is not aligned by the load on the bin, and the end of the sheet P is bent or a dent is formed. and can or, because it may lead to misalignment, the way the bin B _b is shifted up from the position of B _b in the position of the B _a (i.e. when the bin interval C is wide)
The sheet is aligned by the sheet P aligning rod 26 discharged to the outside.

Next, when a reverse sorting (go bottle is lowered after receiving the sheet P), the sheet P as FIG. 9 (a) is discharged to the bin B _b, but moves to B _c position, this If, after discharging the sheet P, after the completion of the movement bin B _b is the position of the B _c, which is configured to match the discharged sheet P by the aligning rod 26.

When the bin B moves downward side, different angles of the bin B _b and B _c, as FIG. 9 (a), in the middle of the bin B _b are moved from the position of B _b in the position of the B _c When the alignment is performed, the stacked sheets (already stacked at the time of alignment of the discharged copy sheets and simultaneously pressed by the alignment bar 26) of the stacked sheets P change the stacking angle of the stacked sheets P. When in (bottles B down in) are pressed, so to generate the misalignment, during descent, the aligning rod 26 after shift down to the position of the B _c from the position of the bin B _b is B _b is discharged sheet P is matched.

The cause of the above-mentioned poor alignment is that when the sheet P on the bin B also moves downward following the lowering of the bin B, when the sheet P is pressed, the alignment rod 26 is moved by the weight of the sheet P to the alignment reference wall. This is because the sheet P is disturbed because the sheet P is left in the state. When alignment of the sheet P, the distance D between the bottle B _b and B _c
Since the sheet is expanded in structure, a sufficient amount of sheets P can be stacked even when the sheet P has a large curl, unlike when the sheet P is raised.

As another example, after discharging the sheet P, the bin B _b is raised or lowered from the first performing matching, the position of the B _b when the order sorting respectively, the position of the B _c when the inverse sorting In such a configuration, the stacking of the sheets P is established. In this case, the alignment timing is such that if the trailing end of the discharged sheet P is not aligned after abutting against the stopper B 'of the bin B, the alignment rod 26 presses the sheet P due to the moment applied to the sheet P and the sheet P Since the matching is deteriorated (twisted and loaded), the matching may be performed after waiting for such time.

By moving the bin B only after the sheet P has been properly aligned, the alignment of the sheet P in the bin B can be performed in the same manner. In this case, it is possible to cope with an image forming apparatus having a long process speed and a long time between papers. The configuration as in this embodiment is required.

Next, an operation of stapling the aligned sheet P will be described.

In the present embodiment, when all the copy sheets are discharged and the alignment is completed in the bin B, the stapling operation of the sheets P is sequentially performed from the bin B whose alignment is completed last.

To briefly explain the above process, after the alignment of the last paper is completed, the sheet bundle (the entire inside of the bin) stacked thereon is again pressed against the alignment reference wall 23 by the alignment bar 26.
The pressing amount of the alignment rod 26 at this time is set to be smaller than that at the time of alignment in the present embodiment for the above-described reason (the alignment pressing amount a ≒ 0 in the present embodiment). . With the above configuration, the consistency is improved from a small number to a large number of sheets P.

As described above, the entire sheet P is held by the alignment bar 26. Next, at the opening of the staple unit, near the sheet entrance of the upper taper guide 87 and the lower taper guide 90,
A curl holder (not shown) for the sheet P is provided.
This curl control mainly restricts the sheet P having a large upper curl to a predetermined amount (the height from the surface of the bin B to the taper start portion of the taper guide 87) or less.

In this state, the staple unit moves from 67X to 67Y in FIG. At this time, bin B
The upper curl of the upper sheet P is regulated by a curl holder (not shown), but the lower curl hanging down from the end on the bin B is lifted up by the taper portion of the taper guide lower 90, and is inserted into the opening of the stapler 67. It works like a jump table at the top of the lower 90 of the taper guide so as not to get caught. With this configuration, the sheets P stacked in the bin B can be stapled stably both in the upper curl and the lower curl.
It is possible to enter the 67 openings.

When the staple unit reaches the position 67Y, the sheet P is detected by the transmission sensor 86, and the sheet P is detected.
Is performed only when the sheets P are stacked on the bin B. When the closing of the sheet P is completed, the staple unit returns to the retreat position 67X which does not buffer the sheet P on the bin B or the bin B even if the bin B shifts.

When the staple unit returns to the evacuation position 67X, the staple unit position detection micro switch 83 is turned off, the shift motor 45 is allowed to rotate, the bin unit is shifted up or down, and the next Of the bin B starts.

If the bin B shifts when the staple unit is at the position 67Y, the leading end of the staple unit may interfere with the sheet P or the bin B and may be damaged in the worst case. The bin unit energization circuit is connected in hardware only when 83 is OFF, and the bin shift is never performed when the staple unit is in the 67Y position even when the software runs out of control. .

Next, at the time of the stapling operation, for example, in a state where the stapling unit is defective or a sheet P having a spring force or more is stacked on the bin B, the stapling operation is still performed, and the stapler 67 is operated during the operation process due to a large load. If the staple unit returns to 67X and the bin B shifts in this state, the sheet P will be broken. In such a case, when the stapler 67 does not return to the home position within a predetermined time after the operation is started (attached in the timer circuit) by a one-rotation (one process) sensor (not shown) in the stapler 67, The drive is rotated in the opposite direction to the one rotation of 67 (the direction to operate the spring) (that is, reverse rotation) to return to the home position, and then the staple unit is
It is configured to return to 67X.

In this case, since the stapling unit has failed to make one rotation in the predetermined direction, a stapler abnormality signal is issued from a control circuit (not shown), and the display is displayed on a display or the like on the image forming apparatus main body. I have.

In the present embodiment, once the stapler drive reverses, an abnormal signal is issued immediately because the stapler unit is abnormal. For example, even if the stapler unit reverses and returns to the home position, the stapler unit returns to the home position again and then in the predetermined direction. 1 in
Normal operation may occur when rotated. In other words, in the case of the stapler 67, when the needle is not normally sent only once by chance, even if only one process happens to be locked and reversely rotated, the stapler 67 may recover to the next normal state.

In such a case, it is dangerous to determine that the system is stopped (staple failure) by outputting an abnormal signal by the reverse rotation of the stapler 67 for only one rotation, and the reverse rotation operation may be increased to two or more times. May be increased twice or three times. For example, in the first bin B, stapler 67
Is reversed, the bin B is shifted, the staple operation is started in the next bin B, and the second trial is started. At this time, when the stapler 67 normally performs the stapling operation of one rotation, the system may be continued as it is, and conversely, the second stapling operation may issue an abnormal signal of the stapling operation only at this time.

 Next, a description will be given of the cascade of the sorters 1.

FIG. 27 is a schematic cross-sectional view when the same sorter is connected in a cascade. In this embodiment, the sorter 1 (first station)
And the sorter 100 (the second) is the same sorter,
By connecting two identical sorters in series, it is possible to store copy paper twice as large as a single sorter.

FIG. 28 shows a top view of a cascaded sorter. In this embodiment, the connection between the sorter 1 and the sorter 100 is such that the rail members 101 and 102 are fixed to the front side X and the rear side Y of the sorter 1 and the sorter 100 by screws.

In addition, the communication of the first and second stations and the supply of power are performed by inserting the cord of the sorter 100 into the power cord stand connector of the sorter 1 by a cord output from a power cord stand (not shown) at the rear of the sorter 1,100. The cord of the sorter 1 is supplied and transmitted in the order of the image forming apparatus → the sorter 1 → the sorter 100 by being inserted into a connector of a power cord stand (not shown) at the rear of the image forming apparatus.

An advantage of this embodiment is that the sorter can be connected to an arbitrary number as long as the power supply permits. In this embodiment, a description will be given of a dual embodiment.
For example, three or four stations can be connected, and if the space for installing the sorter and even the power can be supplied, it is possible to increase the capacity of copy paper stored in the sorter.

Next, a paper path configuration between the sorter 1 and the sorter 100 will be described. In the present embodiment, 2
A continuous stay 105 is provided. This double stay 105
As in the case of the bin B, a trunnion 33 'is rotatably supported on a side portion, and a dual transfer path unit 200 is detachably attached to the double stay 105 by screwing or other holding means. .

Thereby, the trunnion 33 'on the side of the double stay 105
Is moved up and down by the lead cams 42a and 42b, the dual transport path unit 200 is also allowed to move up and down correspondingly, rises to a predetermined position, and faces the lower discharge roller pair 16 of the sorter 1 (bin B). Position where the sheet P is received;
The sheet P can be received at the parallel portion of the lead cam).

Next, the configuration of the dual transport path unit 200 will be described.

In FIG. 29, reference numeral 201 denotes a two-pass transport path unit 200.
An entrance guide 202 indicates an entrance weight 202 for conveying the sheet P. A leaf spring 203 is attached to the distal end of the entrance weight 202, and normally has a function of guiding the insertion of the sheet P when two sorters are used by being pressed against the upper bin B.

FIG. 29 is a plan view of the dual transfer path unit 200, in which a rubber belt 205 is stretched by roller shafts 206 and 207, and a timing belt 208 is stretched between a pulley 209 of the shaft 207 and a pulley 210 of a motor 211. The rotation of the motor 211 causes the roller shaft 207 to move through the timing belt 208.
And the rubber belt 205 is driven.

On the rubber belt 205, an entrance weight 202 and an intermediate weight 204 that can swing around a shaft 208 are located. The sheet P discharged by the lower discharge roller pair 16 is supplied to the entrance guide 201.
And is conveyed to the downstream side by the entrance weight 202 and the intermediate weight 204. A discharge roller 212 is provided at the exit of the two-pass transport unit 200 and plays a role of guiding the sheet P to the entrance 103 of the sorter 100.

Further, in the case of a sorter in which the sheet P can be aligned by penetrating the alignment rod 26 into the bin unit, a unit for driving the alignment rod 26 is provided below the dual transport path unit 200. I have. The operating area of the alignment rod 26 is cut out in the same manner as the bin B, and in order to improve the sheet transportability of the notch, the notch is smooth as shown by reference numeral 216 in FIG. The sheet guide is fixed by a screw (fixing the screw to the lower surface from the transport path so that the sheet P is not caught) or other holding means.

Next, the flow of the sheet P to the continuous path will be described.

In the present embodiment, when the number of copies is equal to or greater than the number of bins in a single unit, for example, when a single unit generates a copy bundle of n + α copies in n bins, the movement of the sorter is completed up to n bundles of staples, and thereafter, The first feeding unit shifts by (n + 1) bins and shifts the double transfer path unit 200 to a position facing the lower discharge roller pair 16 as described above. Thereafter, sorting (or grouping) of the copy sheet bundle of the remaining α portion is performed, and the stapling operation is completed as necessary.

During this operation, the copy sheet bundle for which post-processing has been completed in the first station can be taken out. And if n +
When α of α is n <α, the post-processing (sorting and stapling) of the remaining bundles is automatically performed in the first post-processing after the post-processing of the second station is completed. At this time, the detection of whether there is a sheet bundle left in the previous work of the first
Through-hole in-bottle penetration sensors 400, 400 '(see Fig. 4)
The automatic start is started only when no sheet P remains in the bin. If the sheet P remains in the bin B, the operation is not started until the user removes the entire sheet bundle.

An advantage of this configuration is that an infinite required number of copies can be set in the image forming apparatus, which is implemented in units of n bins accommodated in one station, and in the order of one station → two stations → one station → When working in the first station, remove the sheet bundle that was stored in the second station and completed post-processing, and after removing the sheet bundle, automatically after the first station again after the second station Processing can be started to form a system that forms an infinite loop. In this configuration, two or more sorters can be mounted, or only one sorter can be used. However, in the case of a single unit, the creation of n copies for the number of bins is completed, and when this is completed, all sheets P are removed and then the automatic start is performed again to create the remaining copies.

Next, when this sorter is docked with an image forming apparatus having a document feeder with a document reservation function, it is necessary to respond to the user such as a document storage shelf of the document feeder and a storage shelf of the reservation device. Become. First, creation of a copy bundle from originals on the original storage shelf side is started in the first station, and after completion of the above-described processing, post-processing of the originals in the storage shelf of the reservation device is automatically performed in the second station. The second user can remove the original from the first station after the copy of the original is completed (even if the second user performs post-copy processing in the second station), and removes this copy. The system can be developed such that the sorter (first station) can deal with the third user who re-enters the original on the reserved shelf.

Next, as for the first and second sorters, a sorter with staples may be used with a sorter as in the present embodiment, or a staple-free sorter with only staples in the first station. It may be an action or vice versa. If both the first and second stations have staples, for example, if copying is performed in the auto staple mode, the first station has no needle and the second station has a staple. Therefore, the auto staple mode in the second station is automatically started.

As shown in FIG. 17, the sorter 1 in FIG. 1 includes a central processing unit (CPU) 111, a read-only memory (RO)
M) 112, a random access memory (RAM) 113, a control device 110 including an input port 114, an output port 116, and the like. A control program is stored in a ROM 112, and a RAM 113
Input data and work data are stored in the
Each sensor and switch, such as the non-sort path sensor S1, is connected to 114, and the output port 116 is connected to the carry-in roller pair 1
1. A load such as a transport motor 117 that drives the lower discharge roller pair 16 and the like is connected, and the CPU 111 controls each unit connected via the bus according to a control program stored in the ROM 112. Further, the CPU 111 has a serial interface, and performs serial communication with, for example, a CPU of the copying machine main body, and controls each section by a signal from the copying machine main body.

Then, along the flow shown in FIGS. 18 to 24,
The operation of the present embodiment will be described.

First, as shown in FIG. 18, for example, when the copy start key of the copying machine body is pressed to start the copying operation, a sorter start signal is sent from the copying machine body by a serial signal. Sorter 1 is waiting for this signal (Step 10
1) When the sorter start signal is sent, the process proceeds to Step 102. In Step 102, the operation mode for one job until the sorter start signal disappears next is determined, and the mode data is stored in the RAM 113. Then, in order to detect the position of the alignment rod 26, the alignment rod 26 is once returned to the home position (Step
103). Next, each unit is operated based on the mode determined in Step 102. That is, it is determined whether or not the mode is the non-sort mode in Step 104, and if the mode is the non-sort mode, it is determined whether or not to perform stapling (Step 105).
When stapling is performed, the process proceeds to the staple non-sort mode (Step 107). When stapling is not performed, the process proceeds to the non-sort mode (Step 108). If it is determined in step 104 that the mode is not the non-sort mode, the process proceeds to step 106, and it is determined whether the mode is the sort mode. If the mode is the sort mode, the process proceeds to the sort mode Step 109. If the mode is not the sort mode, it is determined that the mode is the group mode, and the process proceeds to Step 110. After the operation in any one of the above modes is completed, the program proceeds to Step 111, and determines whether or not there is a sorter start signal, that is, whether or not one job has been completed. If there is a sorter start signal, it is determined that one job has not been completed, and the process returns to Step 104 again. If there is no sorter start signal, the program is regarded as one job end and the first St
Proceed to ep101.

If it is determined in Step 101 that there is no sorter start signal, the process proceeds to Step 120, and the door 97 of the staple unit is moved.
Determine if the is opened. If the door 97 is closed, the process proceeds to Step 121, the stapler 67 is retracted, and the program returns to Step 101. If it is determined in Step 120 that the staple unit door 96 is open, the program proceeds to Step 120.
Proceed to 122 to determine if there is no needle. If there is a staple, the program returns to Step 101, but if there is no staple, the stapler 67 is moved to the operating position (Step 123), and the interlock mechanism of the staple cartridge 69 is released.

Next, the operation in the staple non-sort mode will be described with reference to FIG.

The position of the bin unit 9 in the staple non-sort mode is the home position. In Step 201, the bin unit 9 is moved to the home position. Here, the stapler (sheet closing mechanism) 67 cannot staple the sheet placed on the bin cover 22 and staples the sheet P stored in the bin B, so that the staple mode is selected even in the non-sort mode. In this case, it is necessary to put out the sheet P to the bin B, so the flapper solenoid 122 is turned off, and the sort discharge port (lower discharge roller pair) 16 is selected (Step 202). After that, it waits until a size determination signal comes (Step 203), and when a size determination signal comes, it proceeds to Step 204.
In Step 204, the data of the size sent from the copying machine body is stored in the RAM 113, and if the first sheet discharged from the copying machine body is the first sheet (Step 205), the alignment rod 26 should be at the home position. Move the alignment bar 26 to the position 26
Move to a (Step 206). In Step 205, when it is determined that it is not the first sheet, and in Step 206, the alignment rod 26
After moving to 6a, the program proceeds to Step 207. Ste
In p207, the control waits until a paper output signal from the copying machine comes, and when the paper output signal comes, the alignment rod 26 is moved from the width shifting position 26a to the standby position 4.
3b (Step 208), the sheet is conveyed into the bin B (Step 209), the alignment bar 26 is moved to the width approaching position 26a to align the sheet (Step 201), and the program proceeds to Step 211. In Step 211, it is determined whether or not there is a staple signal, and if so, a staple operation is performed (Step 21).
1) If no, the program returns to the main routine.

Next, the operation in the non-sort mode will be described with reference to FIG.

In the non-sort mode, the sheet is discharged onto the bin cover 22, so that the bin unit 2 is moved to the lowest position as the home position (Step 310), and the flapper solenoid 122 is turned on to discharge the sheet from the non-sort discharge port 15. (Step 311). After that, it waits until a size determination signal comes (Step 312). When the size determination signal comes, the size is determined (Step 313), and the program proceeds to Step 314.
In Step 314, a paper discharge signal from the copying machine body is waited. When the paper discharge signal comes, the process proceeds to Step 315 to discharge the sheet onto the bin cover 22, and the program returns to the main routine.

Next, the operation in the sort mode will be described with reference to FIG.

It is determined whether or not there is a bin initial signal indicating whether or not to return the bin unit 2 from the copier body to the home position (Step 401). If yes, the bin unit 2 is moved to the home position (Step 402). Next, the flapper solenoid 122 is turned off to select the sort discharge port 16 (Step 403), and the program proceeds to Step 404. St
In ep404, it waits for a size determination signal to come, and when a size determination signal comes, it proceeds to Step 405. In step 405, the size is determined. Thereafter, it is determined whether or not the size of the first sheet is determined (step 406). If only the first sheet, the alignment bar 26 is moved to the width adjustment position 26a (step 407). Is Step
Proceed to 408. In Step 408, a paper discharge signal from the copying machine body is waited for, and when the paper discharge signal comes, the alignment bar 26 is moved to the standby position 43b (Step 410). Next, a conveying operation for discharging the sheet into bins B is performed (Step 411), and the alignment bar 26 is moved to the width approaching position 26a (Step 413).
Proceed to 4. In Step 414, it is determined whether or not there is a staple signal, and if there is, a staple operation is performed (St
ep415) The program returns to the main routine.

The movement of bin B during sorting will be further described later.

Next, the operation in the group mode will be described with reference to FIG.

First, it is determined whether or not there is a bin initial signal from the copying machine main body (Step 501), and if there is, the bin unit 2 is moved to the home position (Step 502). Next, the process waits for a size determination signal (Step 503), and proceeds to Step 504 when a size determination signal is received. In Step 504, the size is determined, and then it is determined whether the size of the first sheet has been determined (Step 504).
505) If it is the first sheet, the alignment bar 26 is moved to the width approaching position 26a (Step 506), and the program proceeds to Step 507. In Step 507, the process waits for a paper discharge signal, and proceeds to Step 508 when the paper discharge signal comes. In Step 508, the aligning rod 26 is moved to the standby position 26b, and then a transport operation for transporting the sheet into the bin B is performed (Step 509).
Proceed to In Step 510, it is determined whether or not there is a bin shift signal from the copying machine main body.
Is shifted by one bin (Step 511), and after the alignment bar 26 is moved to the width approaching position 26a to align the sheets (Step 51).
2), the program returns to the main routine.

 Next, the transport operation will be described with reference to FIG.

In the conveying operation, when the sorter 1 receives a sheet from the copying machine main body, if the sheet conveying speed of the sorter 1 is lower than the sheet discharging speed of the copying machine main body, the sheet forms a loop between the sorter 1 and the copying machine, Paper jam occurs.
Further, if the sheet conveying speed of the sorter 1 is higher than the sheet discharging speed of the copying machine main body, the sheets are attracted, and there is a danger of generating abnormal noise and damaging the sheets. Therefore, the transport speed of the sorter 1 is adjusted to the process speed of the copying machine (Step 601). Next, whether the flapper solenoid 122 is turned on, that is, the sort discharge port 16
It is determined which one of the non-sort discharge port 15 and the non-sort discharge port 15 is selected (Step 602). If the flapper solenoid 122 is turned on, the non-sort discharge port 15 is selected, so that the process proceeds to Step 603 where the non-sort path sensor S1 detects. If the flapper solenoid 122 is off, the sort discharge port 16 has been selected, and the sort path sensor S2 detects it.
Proceed to. In Step 603 and Step 604, wait until the non-sort path sensor S1 and the sort path sensor S2 are turned on, respectively.
After turning on, the process proceeds to Step 605. In Step 605, a counter for measuring the time when the conveyance motor 117 is controlled at the time of discharge is set. Thereafter, it is determined whether or not the counter set in Step 605 has finished counting (Step 606).
If the count is up, the process proceeds to Step 609, and if not, the process proceeds to Step 607. In Step 607, it is determined whether or not there is a paper discharge signal from the copying machine main body. Only when there is no paper discharge signal, it is determined that the sheet has been completely removed from the copying machine main body, and the conveying speed is maximized (Step 608). Step 609 proceeds after it is determined in step 608 that the discharge control is performed, and the transport motor 117 is controlled to the sheet discharge speed of the copying machine main body.
Thereafter, a counter for measuring the discharge completion point is set (Step 610), and when the counter is up, the operation is terminated (Step 611).

Next, the stapling operation will be described with reference to FIG.

First, in Step 701, the stapler swing motor 119 is turned on to move the stapler 67, and until both the stapler operating position sensor S7 and the stapler positioning sensor S6 are turned on, that is, until the stapler 67 moves to the operating position 67a. The dynamic motor 119 is driven. next,
The stapler motor 71 is driven to perform stapling. The stapler drives the stapler motor 71, confirms that the stapler cam sensor S10 has been turned off, turns off the stapler motor 71 until the stapler cam sensor S10 is turned on, that is, after one rotation, and ends one stapling (Step 702). After that, the stapler operation position sensor S7 is turned off and the stapler positioning sensor S6 is turned on, that is, the stapler 67 is turned off.
Stapler swing motor 119 until is moved to the retracted position 67b.
Is driven (Step 703). Thereafter, it is determined whether or not all bins B... Have been completed. If not completed, the bins are shifted by one bin (Step 705), and Stee is executed for the next stapling.
Proceeds to p701, and when it is completed, the staple operation is completed.

Next, the shift operation in the sort mode, which is the most characteristic part of the present invention, will be described with reference to FIG.

In the shift operation in the sort mode, first, in order to synchronize with the sheet P, a discharge signal of the image forming apparatus is monitored (St.
ep801), when a paper discharge signal comes, timing of the week when the leading edge of the sheet P enters the bin B and the end of the parallel portion of the lead cam 43 are performed. Specifically, a counter for synchronization is set (Step 803), and after counting up (Step 805)
Proceed to 807.

In Step 807, it is determined whether or not the transfer paper is the last paper of one original. If it is the last paper, the rotation of the lead cam 43 is stopped because there is no need to further advance the lead cam 43 (Step 809). .

However, if it is not the last sheet, the program proceeds to Step 811, and changes the speed of the lead cam 43. The speed of the lead cam 43 at this time is obtained by dividing the parallel portion of the lead cam 43 by the time of (paper length / conveyance speed). The paper length data is sent from the main body by serial communication shown in FIG.

After that, the program proceeds to Step 813 to know the rear end of the sheet P, first waits for NO confirmation of the sort path sensor S2, and then waits for OFF of the sort path sensor S2 (Step 81).
Five). Thereafter, the counter from when the rear end of the sheet P is detected by turning off the sort path sensor S2 to when the sheet P is stored in the bin B is set (Step 817). When the cut-up is performed (Step 819), the program proceeds to Step 821. proceed.

In Step 821, the shift speed is changed between the papers, and the speed is obtained by the nonparallel part movement amount / the paper interval time. It should be noted that this inter-sheet time is sent from the copier body via serial communication. After the shift speed is determined, the program returns to Step 801 to process the next sheet P.

Next, speed control of the shift motor 45 will be described with reference to FIG.

Control of the shift motor 45 is performed using the timer interrupt function and the clock interrupt function of the CPU 111.

The timer interrupt function is a function of generating an interrupt at an arbitrary interval by a hard counter in the CPU 111, and the clock interrupt is a function of generating an interrupt by an external pulse edge. In this control, the clock interrupt turns on the clock sensor S13 attached to the encoder of the shift motor 45.

The control method is that the timer interrupt interval is set to the clock interrupt time when the shift motor 45 reaches the target speed, and an increase / decrease counter for the ideal time and the number of clock interrupts is provided. By controlling so as to obtain the ideal speed.

A specific flowchart of the above control is shown in FIGS. 26 (a) and (b).

FIG. 26 (a) shows a clock interrupt process, in which a shift control counter which is an increase / decrease counter is incremented. The shift control counter is provided in the RAM 113
Is set within.

FIG. 26 (b) shows the processing of the timer interrupt. First, the shift control counter is decremented (St.
ep951). Next, the ON / OFF of the shift motor 45 is determined. It is determined whether or not the shift control counter is larger than 0 (Step 953). If it is larger, the shift motor 45 is turned off because the shift motor 45 is too fast (Step 955). Also, Step95
If the shift control counter is equal to or less than 0 in Step 3, Step 9
It is determined whether or not 57 is less than 0.

If the shift control counter is not less than 0, the shift control counter is 0, so that the speed is the target speed, and the timer interrupt ends. If the shift control counter is less than 0, it will be slower than the target speed.
The shift motor 45 is turned on (Step 959) to end the timer interrupt. As described above, the speed control of the shift motor 45 for operating the vertical movement of the bin unit 2 and the expansion of the bin B is performed.

 Next, the operation of the matching rod 26 will be described with reference to FIG.

To move the alignment bar 26 to the width adjustment position, use Step 1001
It is determined whether or not stapling is being performed. If the stapling is being performed, the process proceeds to Step 1002, and the alignment bar 26 is moved to the width shifting position at the time of stapling. If the stapling is not being performed, the process proceeds to Step 1003, and the alignment bar 26 is moved to the width adjustment position at the time of paper discharge.

At the time of stapling, since the alignment is to press down the paper bundle once aligned at the time of discharging the paper, the alignment rod 26 may be moved to the limit of the paper size, but stable alignment is obtained at the time of discharging the paper. This requires a slight indentation. Each alignment position is set under such conditions, and is controlled to an accurate position by the stepping motor 303 for alignment.

When the alignment bar 26 is moved to the standby position, it is determined in Step 1101 whether or not stapling is being performed. If the stapling is being performed, the process proceeds in Step 1102, and the aligning rod 26 is moved to the width shifting position at the time of stapling. If the stapling is not being performed, the process proceeds to Step 1103, and the alignment rod 26 is moved to the position for shifting the width when discharging the paper.

At the time of paper ejection, the sheet P is ejected away from the alignment reference wall 23. Therefore, if the alignment bar 26 is made to stand by at a position where it does not hit the sheet P, the alignment bar 26 must largely escape. However, at the time of stapling, since the sheet is aligned once and the sheet P is close to the alignment reference wall 23, the alignment bar 26 does not need to largely escape. Therefore, the matching rod 26
The amount of movement is reduced to speed up the matching process. The alignment rod 26 for aligning the sheet P is controlled as described above.

In the above-described embodiment, the stapling position of the stapler 67 is prevented from being disturbed by setting the pressing force of the alignment bar 26 when the staple unit is activated to be smaller than the pressing force of the alignment bar 26 when aligning the sheet P. For example, when the stapler unit enters the sheet area, the stapler 67 presses the alignment bar 26 to the sheet end only when the stapler 67 moves from the retracted position 67X to the sheet binding position 67Y. The same effect can be obtained even if the rod 26 is retracted from the end of the sheet.

(G) Effects of the Invention As described above, according to the present invention, even in the case of small-sized sheet width alignment and stapling of a small number of sheets, misalignment that has conventionally occurred due to excessive pressing of the alignment member can be prevented. Disturbance of the staple position can be prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a sheet post-processing apparatus to which an embodiment of the present invention is applied, FIG. 2 is a view as seen from an arrow A in FIG. 1, FIG. 3 is a perspective view of the sheet post-processing apparatus, FIG. 4 is a perspective view of a bin unit, FIG. 5 is a vertical sectional view of a lead cam and a trunnion part, FIG. 6 is a vertical side view of the apparatus shown in FIG. 1 viewed from the opposite side, and FIG. 8, FIG. 8 is a plan view of the same, FIG. 9 is a side view showing the relationship between the lead cam and the bin, FIG. 10 is a plan view of the drive system of the lead cam, FIG. 12 is a plan view of the staple unit, FIG. 13 is a side view of the same,
FIG. 14 is a perspective view of the same, FIG. 15 is a plan view of a drive system of the bin unit, FIG. 16 is a plan view of a sheet aligning section including an alignment reference wall and an alignment member, and FIG. 17 is a sheet sorting apparatus of the present invention. Block diagram showing an example of a control device applied to
26 is a flow chart according to an embodiment of the present invention, FIG. 27 is a vertical side view of a cascade sorter, FIG. 28 is a plan view of the same sorter, FIG. 29 is a plan view of a cascade transfer path, and FIG. FIG. 31 is a side view showing a modified example of the lead cam detection unit, FIG. 32 is a plan view of the same,
FIG. 33 is a flowchart showing the operation of the alignment member. 1. Sheet post-processing device 2. Bin unit 16.
Lower discharge roller pair (sheet discharging means), 23: alignment reference wall, 26: alignment rod (aligning member), 23, 26: alignment means, 6
7: stapler (staple unit), P: sheet, B: bin, a: amount of pushing of the alignment member at the time of sheet alignment, a ': amount of pushing of the alignment member at the time of sheet stapling.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-193860 (JP, A) JP-A-62-288002 (JP, A) JP-A-64-75356 (JP, A) JP-A 61-288 9668 (JP, A)

Claims (2)

(57) [Claims] A tray for storing sheets, sheet discharging means for discharging sheets to the tray, an alignment member for aligning the sheets stored in the tray, and a tray for storing and storing the sheets in the tray.
A sheet post-processing device including a staple unit that binds the aligned sheets, wherein at the time of aligning the sheets, a distance between the alignment members is small by a minute amount (a) with respect to a sheet width of the sheets; At the time of stapling, the distance between the alignment members is reduced by a very small amount (a ') with respect to the paper width, and
A sheet post-processing apparatus, wherein the relationship between (a) and (a ') is: a>a'≥0. 2. The staple unit is movable back and forth between a staple position close to each tray and a retracted position separated from the tray, and the staple unit moves at least from the retracted position to the staple position. 2. The sheet post-processing apparatus according to claim 1, wherein the alignment member presses an end of the sheet while the sheet is being processed.