JP4336660B2 - End face folding apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to an end face folding device such as a folder and a finisher having an end face folding function, and an image forming apparatus.

  2. Description of the Related Art Conventionally, in an electronic copying machine that copies a large-size original such as a drawing original, the image is often copied on a large-size copy paper such as A0 or A1.

  If these large-sized copy sheets are stored as they are or are handled in a large format, the storage space becomes large or the handling is inconvenient, so that they are usually folded and stored.

  However, when the copy sheet is folded manually, it generally takes a considerable amount of time, and the time required for folding the sheet may be several times the time required for copying.

  For this reason, there is an apparatus called a paper folding machine in which a paper folding machine is arranged in the discharge path of the copying machine, and for example, a drawing of A0 size is folded into A4 size.

  When such a paper folding machine is used to fold a large-sized sheet as a small-sized sheet, if the folded sheet is bound, it will be bound to the end face of the sheet.

  In order to prevent such binding of the end face, it is necessary for the operator to manually fold the end face portion of the folded paper, and then create a file by binding the end face with staples, punches, or the like. is there.

  However, if the operation of folding the end face portion is performed on all sheets, the burden on the operator increases. For this reason, there has been proposed an end surface folding device that can automatically fold an end surface of a sheet to reduce the burden on the operator.

  Here, the stack processing tray for stacking sheets, the jogger fence for aligning the stack of sheets stacked on the stack processing tray, and the binding process for the stack of sheets stacked in the stack processing tray are performed. A binding stapler, a folding plate and a folding roller for performing folding processing on a sheet bundle bound by a saddle stitching stapler, and a size in the width direction of the sheet bundle subjected to the binding processing by a jogger fence and the length in the conveyance direction are the same. Is provided with a CPU that simultaneously aligns sheets having a size of 2 times or more and performs a binding process on the vicinity of the center of the sheet bundle with a saddle stitch stapler, so that the staples cannot be seen on the cover, and the booklet page Even if the number increases, the technology that aligns the edge of the paper neatly and makes it easy to create a good-looking book. Are plan (e.g., see Patent Document 1).

  A sheet conveying unit configured to convey the sheet; an end surface folding unit including an end surface folding member that is movable up and down between a first position for scooping up the end surface of the sheet and a second position for folding the end surface of the scooped sheet; A paper detection means for detecting the arrival of the paper in the vicinity of the end face folding member, and after the arrival of the paper is detected by the paper detection means, the end face folding member is set at the first position at a fixed timing; After the end face of the paper is placed on the end face folding member, the end face folding control means for setting the end face folding member to the second position at a certain timing and controlling the end face of the paper to be folded thereunder, and the end face There has been proposed an end face folding device comprising an end face folding means having a pair of folding rollers for nipping the folded paper and folding the end face (for example, a special feature). References 2).

Further, an ear folding roller device arranged in the paper conveyance path, a conveyance roller device arranged at a predetermined interval upstream of the ear folding roller device, an ear folding roller device, and a conveyance roller device. A sheet detecting member is disposed between the sheet detecting member and a member that protrudes into the sheet conveyance path and curves the corner of the sheet based on a signal from the sheet detecting member. By operating a member that curls the corner, the paper is transported by the transport roller device while curving the corner portion of the paper, and the curved portion of the paper is inserted between the rollers of the ear folding roller device. Thus, there has been proposed a paper ear folding device characterized by performing ear folding (see, for example, Patent Document 3).
Japanese Patent Laid-Open No. 2004-10198 Japanese Patent No. 3173121 Utility Model Registration No. 2524155

  However, the conventional example described above has the following problems.

  When the edge of the sheet is turned up by the edge-folding member that can move up and down by scooping up the edge of the paper, and the edge is folded by the pair of folding rollers, it enters the nip of the pair of folding rollers from the curved part of the turned-up paper. In case of stiff paper such as cardboard, it may escape, and the angle of the folds of the edge folds may vary, or the wrinkles may be bent and bent, causing paper jams in the worst case .

  Further, in this case, the folds of the end face folds are weak, and if the folds are stacked, the sheet becomes thick and the number of stored sheets is reduced when filing. Further, since the size of the fold of the end face fold depends on the shape of the end face folding member that scoops up the end face and can be moved up and down, there is a problem that the shape cannot be arbitrarily changed.

  The present invention has been made in view of such a problem, and the object thereof is not to stop the paper in the paper conveyance path, and even in the case of stiff paper such as cardboard, the end face folding shape does not vary, It is an object of the present invention to provide an end face folding device and an image forming apparatus in which the end face folding is finished according to the position of the aimed end face fold, with less wrinkling, bending, and paper jam, less likely to cause skew and abnormal end face folding.

According to the first aspect of the present invention, the transport direction is changed by the paper transporting means for transporting the paper, the feed direction changing means for changing the end face feed direction of the front end of the paper by the contact and release of the roller pair, and the feed direction changing means The end surface of the paper front end face is turned by a guide plate arranged near the downstream of the feeding direction changing means. end face, wherein the folding roller pair increasing, to have a member for controlling a portion turned over a portion of the end surface of the paper leading end face in the direction of the conveying direction and opposite, the a is turning start position boundary point blind portion not It is a folding device.

According to a second aspect of the present invention, in the end face folding device according to the first aspect , the member for controlling the turning start position of the end face turning means moves according to the size of the paper and changes the size of the end face turning. A feed direction changing means for changing the end face feed direction of the paper is provided in the vicinity of the member that controls the turning start position of the end face turning means .

The invention according to claim 3 is the end face folding device according to claim 1 or 2, wherein the feed direction changing means is arranged for each size, and the feed direction changing means is selected and moved corresponding to each size. And

According to a fourth aspect of the present invention, in the end face folding device according to any one of the first to third aspects , the feeding direction changing means is configured in the large size and in the vicinity of the end in the paper width direction. Features.

The invention according to claim 5 is the end face folding device according to any one of claims 1 to 4 , wherein the entrance shape of the roller pair of the feed direction changing means and the guide plate of the end face turning means is the same value as the fold angle. It is characterized by setting to .

According to a sixth aspect of the present invention, in the end face folding device according to any one of the first to fifth aspects , a guide plate is formed in the vicinity of the upstream and downstream sides of the roller direction of the feed direction changing means. It is characterized in that it moves integrally with the contact / release operation of the roller pair of the direction changing means .

According to a seventh aspect of the present invention, in the end face folding device according to any one of the first to sixth aspects, the front end face of the paper whose transport direction has been changed by the end face turning means is changed to an end face in a direction opposite to the transport direction. Immediately after starting the operation of turning a part of the roller, the abutting of the roller pair of the feed direction changing means is released .

The invention according to an eighth aspect is the end face folding device according to any one of the first to seventh aspects, wherein the roller pair of the feed direction changing means is in an idling state in which no drive is applied .

The invention according to claim 9 is the end face folding device according to any one of claims 1 to 8 , wherein the end face turning means and the member for controlling the turning start position move in conjunction with the operation of the end face turning means. Features.

A tenth aspect of the present invention is an image forming apparatus comprising the end face folding device according to any one of the first to ninth aspects .

  According to the end face folding device and the image forming apparatus of the present invention, the end face folding shape does not vary even in the case of stiff paper such as thick paper without stopping the paper in the paper transport path, and it is wrinkled and bent. The paper is less jammed, the skew and the abnormal end face are less likely to occur, and the end face fold is finished according to the position of the end face fold.

  An end face folding device according to a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view of a machine in which a paper folding machine having an end face folding device is mounted on a copying machine.

  2 to 5 are side views showing the operation of the end face folding device, FIG. 6 is a schematic view showing a drive system configuration in the present embodiment, and FIGS. 7 to 9 are top views showing end face folding operations of each size, 10 is a top view of a mechanism for moving the turning start position of the end face turning means corresponding to each size, FIGS. 11 and 12 are operation views as seen from the side of FIG. 10, and FIG. 13 is a paper having an end face folding device. FIG. 14 is a block diagram of a substrate configuration for controlling the folding machine, and shows a follow chart in the present embodiment.

  First, the overall configuration will be described with reference to FIG. The paper folding machine 1 is a paper folding machine connected to the back surface of the copying machine main body 200.

  The paper folding machine 1 includes a connecting part 6 to the copying machine main body 200, an end face folding part 2 that folds the end face of the front end of the paper, a bellows folding part 3 that folds the paper in a bellows shape in the transport direction, and a paper folded in a bellows shape. It consists of a cross fold 4 that folds in the direction perpendicular to the size of A4 and a stacker 5 that discharges and stacks sheets folded in the size of A4.

  In the copying machine main body 200, an image reading device 206 is disposed, and a manual sheet feeding table 208 is disposed below the image reading device 206. A sheet is set on the manual sheet feeding table 208, and the sheet is temporarily stopped by the registration roll 207 and supplied to the image forming unit 206 at a timing. The image forming unit 206 forms a latent image corresponding to the image data on a photoconductor (not shown), develops the latent image with toner, transfers the toner onto a sheet, and fixes the image on the fixing device 210. .

  The recorded paper on which the toner is fixed by the fixing device 210 is discharged by the recorded paper discharge roll 211 to the paper folding machine 1 when paper folding is performed. When paper folding is not performed, the paper is discharged into the main body by the upper paper discharge roller 209 by a switching claw (not shown).

  Next, when folding the paper, the paper is fed from the recorded paper discharge roll 211 to the paper folding machine 1, passed through the connecting portion 6, sent by the entrance conveyance roller pair 16 of the end face folding portion 2, and the paper end face is folded. In this case, the end face at the front end of the sheet is folded by the end face folding portion 2.

  After the end face of the paper is folded by the end face folding part 2, the paper is folded in a bellows shape in the transport direction by the folding bellows folding part 3, and the paper is further folded to the size of A4 by the cross folding part 4. Stacked.

  Next, a first embodiment will be described. FIG. 2 is an enlarged view of the end face folding portion 2 of FIG. The top view of FIG. 2 is FIG. In FIG. 7, a leading edge detection sensor 17 that detects the leading edge position of the sheet is disposed in the vicinity of the downstream center of the entrance conveyance roller 16, and a swing roller unit 40 is configured further downstream. Further, a folding roller pair 11 is disposed on the downstream side.

  As shown in FIG. 6, the gear 25 is fixed to the end face conveying roller 42 with which the swing roller unit 40 abuts, and the gear 25 is connected to the gear 27 b integrated with the pulley 27 b via the gear 26. The pulley 27 b is connected to the pulley 23 fixed to the entrance conveyance roller 16 via the drive belt 24.

  A pulley 21 is fixed to the folding roller 11, and the pulley 21 is connected to a pulley 28 b that is coaxially fixed to the pulley 27 </ b> A via a drive belt 22. Further, a pulley 28 A integrated with the pulley 28 b and a pulley 31 fixed to the motor 30 are connected by a drive belt 29. Therefore, the folding roller 11, the entrance conveyance roller 16, and the end surface conveyance roller 42 are configured such that when the conveyance motor 30 rotates in the arrow direction, each roller also rotates in the arrow direction.

  Further, as shown in FIG. 7, the axis center of the end face conveying roller 42 and the central axis of the swing roller 41 of the swing roller unit 40 that abuts are arranged at the same angle as the fold angle Q of the sheet end face fold.

  Furthermore, the entrance shape of the guide plate 44 for turning the sheet end surface formed on the downstream side of the swing roller unit 40 has an oblique shape having the same angle as the fold angle Q as shown in FIG.

  Next, the swing roller unit 40 will be described. 2 and 3, the swing roller unit 40 is configured to be swingable about a rotation center 55A, and a swing roller 41 is rotatably configured on a swing roller guide plate 55 having the rotation center 55A. A solenoid 48 and a return spring 49 are connected to the other end side with respect to the rotation center 55A.

  Therefore, at the time of standby as shown in FIG. 2 where end face folding is not performed, the solenoid 48 is turned off and pulled by the return spring, so that the swing roller unit 40 does not contact the end face transport roller 42 and is released. When performing end face folding from this state, the solenoid 48 is turned on, the swing roller unit 40 rotates around the rotation center 55A as shown in FIG. 3, and the swing roller 41 rotates in the direction of the arrow from the broken line position to the solid line position. It moves and comes into contact with the end face conveying roller 42.

  Further, the swing roller guide plate 55 has guide shapes on the upstream side and the downstream side of the swing roller 41, respectively. When the swing roller 41 in FIG. The nip between the swing roller 41 at the front end and the end surface transport roller 42 is guided, and immediately after the front end of the sheet passes through the nip between the swing roller 41 and the end surface transport roller 42, the guide to the fixed guide plate 45 at the front end of the sheet is guided. Is going.

  Further, as shown in FIG. 7, the swing roller unit 40 is disposed in the vicinity of the A0 size edge turning start position (position A0 in FIG. 7), and is also swung near the end face of the A0 sheet. The moving roller unit 40 is disposed (position A0 ′ in FIG. 7).

  Further, as shown in FIG. 8, the swing roller unit 40 is disposed in the vicinity of the A1 size end face turning start position (A1 position in FIG. 8), and as shown in FIG. 9, the swing roller unit 40 is located in the vicinity of the A2 size end face turning start position. (Fig. 9A2 position).

  Next, the fixed guide plate 44 for turning the sheet end surface and the moving guide plate 45 for changing the sheet end surface start position will be described.

  As shown in FIG. 2, the fixed guide plate 44 for turning the sheet end surface is rotatably connected to the center of rotation 11 </ b> A of the folding roller 11, and the fixed guide plate 44 has a moving guide plate 45 for changing the sheet end surface start position. It is configured to be movable in the paper width direction.

  Therefore, the fixed guide plate 44 and the moving guide plate 45 are rotatably connected to the center of the rotation center 11A.

  Further, the fixed guide plate 44 is connected to a tension spring 46, and the fixed guide plate 44 and the moving guide plate 45 are urged upward about the center of rotation 11A.

  Next, the movement mechanism of the movement guide plate 45 in the paper width direction will be described with reference to FIG. In order to change the sheet end face starting position, the moving guide plate 45 is configured to be movable in the sheet width direction with respect to the fixed guide plate 44. Further, the moving guide plate 45 has a rack portion 45A, and the rack portion 45A and the moving motor 51 are arranged. The moving motor 51 is fixed to the casing of the folder 1 (not shown).

  Therefore, as shown in the figure, when the moving motor 51 rotates forward and backward, the moving guide plate 45 is configured to move back and forth in the paper width direction. At this time, the moving guide plate 45 has a home position sensor (hereinafter referred to as an HP sensor) 50 fixed to the casing of the folding machine 1, and a light guide plate 45 b that shields the optical axis of the HP sensor 50. The moving guide plate 45 is configured to be shielded from light at the standby position in the paper width direction.

  Next, the operation in which the fixed guide plate 44 and the moving guide plate 45 rotate about the rotation center 11A will be described with reference to FIG. The rack portion of the moving guide plate 45 has portions 45A and 45c. As can be seen from FIG. 11 when FIG. 10 is viewed from the side, the rack portion 45A is configured to be thicker, and the rack portion 45c is inclined so as to gradually become thinner from the thickness of 45A. The tip has a portion that is thinned at a constant thickness.

  Further, as shown in FIG. 11, the upper surface of the rack portion 45 </ b> A and the flange 52 </ b> A of the gear 52 of the moving motor 51 are brought into contact with each other by the tension spring 46. If the moving motor 51 is rotated in the direction of the arrow as shown in FIG. 10 from that state, the moving guide plate 45 is also moved in the direction of the arrow. Then, the upper surface of the rack portion 45c and the gear 52 of the moving motor 51 are now turned on as shown in FIG. The collar 52A is brought into contact.

  A view of the state at this time as seen from the side view is the state of FIG. At this time, since the thickness of the rack portion changes from a thick state of 45A to a thin state of 45c, the fixed guide plate 44 and the moving guide plate 45 are lifted by the tension spring 46.

  A view of this state from a side view is the standby position state of FIG. 2. At this time, the movement guide plate 45 is moved to the position of the broken line in FIG. 10 and the light shielding plate 45 b of the movement guide plate 45 is HP. The standby position is detected by blocking the optical axis of the sensor 50.

  Further, as the configuration of the control system, as shown in FIG. 13, the operation unit 201 configured in the copier apparatus main body 200 allows the user to select whether or not to fold the paper, and when folding the paper, the end face is not folded or folded. Perform the input operation. The input signal is transmitted to the main body control board 202, and the signal is further transmitted to the paper folding controller 100 configured in the paper folding machine 1 to control the paper folding operation. Further, the end face folding is controlled by the paper folding controller 100, and the rotation and stop control of the guide plate moving motor 51 and the conveyance motor 30 are performed based on the input signals of the leading edge detection sensor 17 and the guide plate HP sensor 50.

  Next, the operation of the present embodiment will be described with reference to FIGS. 2 to 5 and FIGS. 7 to 12 and the flowchart of FIG.

  First, when an end face folding signal is input to the operation unit 201 on the copier apparatus main body 200 side (S0), the signal is input to the paper folding controller 100 via the main body control board 202.

  Therefore, the paper folding controller 100 checks the signal of the HP sensor 50 to determine whether the moving guide plate 45 is at the standby position (S1). If the HP sensor 50 is not ON, the paper folding controller 100 rotates the guide plate moving motor 51 (S2). When the guide plate 45 comes to the standby position, the HP sensor 50 is turned on (S3), and the guide plate moving motor 51 is stopped (S4).

  From this state, the conveyance motor 30 starts rotating (S5), and the guide plate moving motor 51 is rotated again to the end face folding start position of the designated paper size, and the moving guide plate 45 is moved to a predetermined position (S6).

  In this embodiment, when the A0 vertical sheet size is folded on the end face, the operation of S6 moves to the position of the moving guide plate 45 in FIG. 7, and when the A1 vertical sheet size is folded on the end face, the operation of S6 is performed. In the case where the sheet is moved to the position of the movement guide plate 45 of No. 8 and the sheet size of A2 length is folded, the movement guide plate 45 is moved to the position of the movement guide plate 45 of FIG.

  Next, the solenoid 48 of the swing roller unit 40 of the specified paper size is turned on, the swing roller unit 40 rotates around the rotation center 55A as shown in FIG. 3, and the swing roller 41 is moved from the broken line position to the solid line position. It rotates in the direction of the arrow and comes into contact with the end face conveying roller 42 (S7).

  At this time, when the solenoid 48 of the swing roller unit 40 within each paper size width is turned ON and the paper size of A0 length is folded, the solenoids 48 of A0, A1, A2, A0 ′ of FIG. 8 is turned ON and the A1 vertical sheet size is folded on the end face, the solenoids A1, A2 in FIG. 8 are turned ON in the operation of S7, and the A2 vertical sheet size is folded on the end face. 9 A2 solenoid 48 is turned ON.

  In this state, with the conveyance motor 30 rotating, the folding roller 11 and the entrance conveyance roller 16 rotate in the direction of the arrow as shown in FIG. 3, and wait for the recorded paper to be fed by the discharge roll 211 of the copying machine main body 200. .

  The sheet reaches the entrance conveying roller 16 as shown in FIG. 3, the leading edge detection sensor 17 is turned on by the leading edge of the sheet, the leading edge of the sheet reaches the nip between the swing roller 41 and the end surface conveying roller 42, and the end surface of the sheet is as shown in FIG. When the paper size of A0 vertical is folded on the edge, FIG. 7 shows that the paper size of A1 is folded, FIG. 8 shows that the paper size of A2 is folded on the edge, and FIG. Is sent onto the fixed guide plate 44. Therefore, after the leading edge of each paper size reaches the end-face feed start position (tn seconds after the leading edge detection sensor 17 is turned on), the solenoid 48 that has been turned on according to the respective paper size is turned off and swings as shown in FIG. The moving roller 41 is separated from the end face conveying roller (S8).

  In this state, the conveyance motor 30 continues to rotate and the paper continues to be fed. At the same time, the movement motor 51 is rotated in the arrow direction as shown in FIG. 10 (S9), and the movement guide plate 45 is moved in the arrow direction. The light shielding plate 45b of the movement guide plate 45 shields the optical axis of the HP sensor 50 while moving to the position (S10), and stops the moving motor 51 when the standby position is reached (S10).

  Then, as shown in FIG. 5, the fixed guide plate 44 and the moving guide plate 45 are lifted by the tension spring 46, and the fixed guide plate 44 and the moving guide plate 45 have a guide shape inclined with respect to the folding roller pair 11. In this state, the end face of the sheet is folded, sent under the fixed guide plate 44, enters the nip of the pair of folding rollers 11, and is discharged in a state where the end face of the sheet is completely folded.

  Here, a signal indicating whether the next sheet is present or not is sent from the main body control board 202 to the sheet folding controller 100 (S12), and if there is no next copy, the conveyance motor 30 is stopped and the process is terminated.

  If there is a next copy, the transport motor 30 continues to rotate, returns to the state of S5 in FIG. 2, and repeats the operations after S6 until the final copy.

  As described above, according to the present embodiment, the transport direction is changed by the paper transport means for transporting the paper, the feed direction changing means for changing the end face feed direction of the paper, and the previous feed direction changing means. In an end face folding device having an end face turning means for turning the end face of the paper and further having a pair of folding rollers for nipping the end face of the paper to bend the end face, a member for controlling the turning start position of the end face turning means By moving according to the size and changing the size of the end face turning, the size of the end face fold can be changed depending on the paper size, regardless of the thickness of the paper, the fold of the end face fold does not vary, wrinkles, bends, Paper jams are less likely to occur.

In addition, for any paper size, there is a feed direction changing means for changing the paper end face feeding direction in the vicinity of the member that controls the turning start position of the edge turning means, so that the paper leading edge controls the turning start position more. When the sheet reaches the member to be buckled, the space for the sheet to escape when buckling can be reduced, and wrinkles, bends, and paper jams are less likely to occur.
Feed direction changing means for changing the end surface direction of feed of the paper are provided in every size, by moving by selecting the feed direction changing means for changing the end face feeding direction corresponding to each size, the width outside the partial folding end face There is no effect on the conveyance performance, and it is difficult to cause skew due to end face folding and abnormal end face folding.

  In addition, the feeding direction changing means for changing the feeding direction of the end face of the paper is configured in the vicinity of the edge in the paper width direction in the large size, thereby reliably enabling the turning operation of the paper edge in the large size. In addition, paper clogging or the like is less likely to occur even with paper whose end portion is difficult to be turned, such as curled paper under the leading edge.

  Further, the feeding direction changing means for changing the feeding direction of the sheet edge is performed by the contact and release of the roller pair, and the edge turning means for turning the sheet edge face is performed by a guide plate disposed in the vicinity of the sheet edge. Regardless of curling, the end face of the paper can be reliably fed to the end of the guide plate and the end of the paper can be turned over, and paper jams are less likely to occur.

  Further, by setting the entrance shape of the roller pair of the feeding direction changing means and the guide plate of the end face turning means for turning the paper end face to the same value as the crease angle, the end face folding is performed according to the position of the aimed end face fold. Is possible.

  Further, a guide plate is formed in the vicinity of the upstream side and the downstream side of the roller pair of the feed direction changing unit, and the guide plate moves integrally with the contact and release operations of the roller pair of the feed direction changing unit. The direction changing means is guided to the roller pair nip, and the guide to the end face turning means for turning the end face of the paper is surely performed, so that the paper jam or the like is less likely to occur.

  Further, by releasing the roller pair abutment of the feed direction changing means immediately after the leading edge of the end face turning means reaches the turning start position of the end face turning means, the leading edge of the paper is turned and excessive when submerged below the end face turning means. The transport force is lost, and wrinkles, bends, and paper jams are less likely to occur.

  Further, since the roller pair of the feed direction changing means is in an idle state in which the roller pair is not driven, even if the transport force is easily transmitted to the feed direction changing means in the case of thick paper with a stiff paper, an excessive amount is required. The conveyance force is lost, and wrinkles, bends, and paper jams are less likely to occur.

  Further, the end face turning means for turning the sheet end face and the member for controlling the turning start position of the end face turning means move in conjunction with the operation of the end face turning means, whereby the end face turning means for turning the end face of the paper is turned. When it is entered, the end face turning means can be guided to the folding roller pair in an inclined manner, and paper jams are less likely to occur.

  Next, a second embodiment will be described. This embodiment is a driven state in which the end face conveyance roller 42 is not always driven as compared with the first embodiment. Specifically, in FIG. 6, the gear 25 is not coupled to the end surface conveyance roller 42, and the driving force of the conveyance motor 30 is not transmitted, and is always in a driven state. The operation is the same as in the first embodiment.

  Each of the above-described embodiments is a preferred embodiment of the present invention, and various modifications can be made without departing from the scope of the present invention.

1 is a side view of a paper folder connected to a copying machine apparatus main body according to a first embodiment. FIG. It is an operation | movement side view in the 1st Embodiment of this invention. It is an operation | movement side view in the 1st Embodiment of this invention. It is an operation | movement side view in the 1st Embodiment of this invention. It is an operation | movement side view in the 1st Embodiment of this invention. FIG. 3 is a schematic diagram of a drive configuration in the first embodiment of the present invention. FIG. 5 is a top view when folding the end face for each paper size according to the first embodiment of the present invention. FIG. 5 is a top view when folding the end face for each paper size according to the first embodiment of the present invention. FIG. 5 is a top view when folding the end face for each paper size according to the first embodiment of the present invention. It is an operation | movement figure of the end surface turning means in the 1st Embodiment of this invention. It is an operation | movement figure of the end surface turning means in the 1st Embodiment of this invention. It is an operation | movement figure of the end surface turning means in the 1st Embodiment of this invention. It is a block diagram in a 1st embodiment of the present invention. It is a flowchart of the processing operation in the 1st Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper folding machine 2 End surface folding part 11 Folding roller 16 Entrance conveyance roller 17 Front end detection sensor 30 Conveyance motor 40 Oscillation roller unit 41 Oscillation roller 42 End surface conveyance roller 44 Fixed guide plate 45 Moving guide plate 48 Solenoid 50 HP sensor 51 Movement Motor 100 Paper folding controller 200 Copier apparatus main body 201 Operation unit 202 Main body control board 211 Discharge roll

Claims (10)

Paper transport means for transporting paper,
A feed direction changing means for changing the end face feed direction of the front end of the paper by contact and release of a pair of rollers;
End face turning means for turning a part of the front end face of the paper in the direction opposite to the transport direction by a guide plate arranged in the vicinity of the downstream of the feed direction changing means, the paper front end face whose transport direction has been changed by the feed direction changing means;
A pair of folding rollers that nips the end face of the turned paper and folds the end face;
End face folding apparatus characterized by having a member for controlling a portion turned over a portion of the end face in the direction of the conveying direction opposite the paper leading edge, the a is turning start position boundary point blind no part. The member for controlling the turning start position of the end face turning means moves according to the size of the paper and changes the size of the end face turning,
  2. The end face folding according to claim 1, wherein a feed direction changing means for changing an end face feed direction of the paper is provided in the vicinity of a member for controlling a turning start position of the end face turning means for any paper size. apparatus. The feed direction changing means is disposed for each size, the end face folding apparatus according to claim 1 or 2 SL placing in correspondence with each size and wherein the moving and selecting the feed direction changing means. The end face folding device according to any one of claims 1 to 3, wherein the feeding direction changing means is configured in the vicinity of an end portion in a paper width direction in a large size. 5. The end face folding device according to claim 1, wherein the shape of the entrance of the roller pair of the feed direction changing means and the guide plate of the end face turning means is set to the same value as the fold angle. . A guide plate is formed in the vicinity of the upstream and downstream sides of the roller pair of the feed direction changing means, and the guide plate moves integrally with the contact and release operations of the roller pair of the feed direction changing means. The end face folding device according to any one of 1 to 5. Immediately after starting the operation of turning a part of the end face in the direction opposite to the transport direction of the front end of the paper whose transport direction has been changed by the end face turning means, the roller direction contact of the feed direction changing means is released. The end face folding device according to any one of claims 1 to 6. 8. The end face folding device according to claim 1, wherein the roller pair of the feed direction changing means is in an idling state in which no drive is applied. 9. The end face folding device according to any one of claims 1 to 8, wherein the end face turning means and a member that controls the turning start position move in conjunction with the operation of the end face turning means. An image forming apparatus comprising the end face folding device according to claim 1.

Images