JP2012020872A - Apparatus for folding paper sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for folding a paper sheet the productivity of which can be improved.SOLUTION: The apparatus for folding the paper sheet includes: a blade member by the tip of which the surface of the paper sheet is pressed to push the pressed paper sheet into a paper sheet folding part by which the paper sheet is folded; and a pair of clamping members which are arranged in the paper sheet folding part and used for clamping the paper sheet pushed into the paper sheet folding part by the blade member. The paper sheet is clamped and folded by the pair of clamping members. The apparatus for folding the paper sheet further includes a control means for controlling the pair of clamping members so that the paper sheet can be clamped between the pair of clamping members while changing a clamping position according to a direction that the paper sheet is pushed by the blade member, namely, so that the clamping position may be moved to the same direction as the direction that the paper sheet is pushed by the blade member or the clamping position may be moved to a direction opposite to the direction that the paper sheet is pushed by the blade member.

Description

  The present invention relates to a sheet folding device that performs a folding process on a loaded sheet.

  As this type of paper folding apparatus, there is known a paper folding apparatus that performs a folding process on paper after image formation has been performed by the image forming apparatus. The paper folding device described in Patent Document 1 includes a push blade that pushes the folding position of the paper at a right angle, and a pair of press blades that are arranged so as to face each other with the movement path of the bush blade sandwiched and press the paper. ing. The paper folding position is pushed to the paper pinching position by the push blade, and the press blade pair is moved from the standby position toward the paper pinching position. Then, the both sides of the folding position of the paper and the tip of the press blade pair are rubbed and pressed between the two sides of the press blade pair, and the paper is folded. After the folding of the sheet is completed, the pair of press blades is moved along the sheet surface from the nipping end position to the nipping start position, and then the press blade is separated from the sheet surface and returned to the standby position. In this way, the nipping start position for the paper is always started from the same position.

  However, when folding a plurality of sheets in succession, the press blade extends along the sheet surface from the nipping end position to the nipping start position between the completion of the folding process of the previous sheet and the start of the folding process of the next sheet. There is a problem that the time for moving is lost and the productivity is deteriorated.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a sheet folding device capable of improving productivity.

In order to achieve the above object, the invention of claim 1 is directed to a blade member that presses a paper surface with a tip and pushes the paper toward a paper folding portion that folds the paper, and the blade disposed in the paper folding portion. A pair of sandwiching members that sandwich the sheet pushed into the sheet folding section by the member, and the pair of sandwiching members performs folding processing on the sheet by sandwiching the sheet with the pair of sandwiching members. The sheet can be sandwiched while changing the sandwiching position with respect to the sheet according to the pushing direction of the sheet by the blade member, and the sandwiching member can sandwich the sheet so that the sandwiching position moves in the same direction as the pushing direction. The sheet is sandwiched by the sandwiching member so that the position moves in the direction opposite to the pushing direction. , It is characterized in that it has a control means for controlling the gripping members.
According to a second aspect of the present invention, in the paper folding apparatus according to the first aspect, a pinching start position when the paper is pinched by the pinching member so that the pinching position moves in the same direction as the pressing direction, and the pinching position Is the same position as the nipping end position when the sheet is nipped by the nipping member such that the nipping member moves in the direction opposite to the pushing direction, and the nipping member moves so that the nipping position moves in the same direction as the pushing direction. The nipping end position when the sheet is nipped and the nipping start position when the sheet is nipped by the nipping member so that the nipping position moves in the direction opposite to the pushing direction are the same position. is there.
Further, the invention according to claim 3 is the sheet folding device according to claim 1 or 2, wherein the pair of sandwiching members are arranged so that the side surfaces thereof face each other, at least one of which is a pair of plate-like members having a curved shape. The sheet is sandwiched between the convex side surface of the curved plate member and the side surface of the other plate member while swinging the plate member.
According to a fourth aspect of the present invention, in the paper folding device of the first, second, or third aspect, a pair of rollers is provided upstream of the sandwiching member in the pushing direction, and the sandwiching position is the pushing direction. When the paper is sandwiched by the sandwiching member so as to move in the opposite direction, the paper is sandwiched and held by the roller pair when the leading end of the paper is sandwiched by the sandwiching member.
According to a fifth aspect of the present invention, in the paper folding device of the fourth aspect, after the leading end of the paper is pinched by the pinching member, the holding of the paper by the roller pair is released. is there.
According to a sixth aspect of the present invention, in the paper folding apparatus of the first, second, third, fourth, or fifth aspect, the paper conveying means for conveying the paper subjected to the folding process by the sandwiching member; and the paper conveying means A sheet detection unit that detects that the conveyed sheet has reached a predetermined position of the sheet folding unit, and a sheet on which a folding process is performed next based on the timing at which the sheet detection unit detects the sheet. The timing at which the blade is pushed into the paper folding portion by the blade member is determined.

  In the present invention, the pair of sandwiching members may sandwich the sheet from the upstream side in the pushing direction toward the downstream side in the pushing direction, or may sandwich the sheet from the downstream side in the pushing direction toward the upstream side in the pushing direction. it can. Thus, for example, after performing a folding process for sandwiching the sheet from the upstream side in the pushing direction toward the downstream side in the pushing direction, the next sheet is directed from the downstream side in the pushing direction toward the upstream side in the pushing direction. Thus, the sheet can be sandwiched and folded. Therefore, since the next sheet can be nipped from the nipping end position side of the previous sheet by the nipping member, the nipping member can start the nipping of the next sheet from the same side as the previous sheet nipping start position. Since it is not necessary to operate, the time from the completion of the folding process of the previous sheet to the start of the folding process of the next sheet can be shortened, and the productivity can be improved.

  As described above, according to the present invention, there is an excellent effect that productivity can be improved.

The simplification figure which shows the positional relationship of a sheet | seat and a press board. The schematic block diagram of the sheet | seat post-processing apparatus which concerns on this embodiment. The perspective view of a press folding part. The side view of a press folding part. FIG. 4 is a configuration diagram of a press folding unit in a state where a press plate driving cam, a folding blade driving cam, and a side plate are removed from FIG. 3. The side view of the press folding part at the time of seeing the press folding part shown in FIG. 5 from the side surface side. The perspective view of the press folding part which removed the movement plate from FIG. The side view of the press folding part which expanded the dotted-line part H of FIG. 7, and was seen from the side surface side of a press folding part. The figure which showed the inside of the press folding part shown in FIG. The side view of the press fold part which looked at the press fold part shown in FIG. 9 from the side surface side. The schematic diagram which shows the relationship between a movement plate and a press board. Overall flow diagram regarding press folding. Overall flow diagram regarding press folding. Overall flow diagram regarding press folding.

  Hereinafter, an embodiment in which the present invention is applied to a sheet post-processing apparatus that performs a folding process or the like as post-processing on a sheet discharged from an image forming apparatus will be described.

  FIG. 2 is a schematic configuration diagram of the sheet post-processing apparatus 100 according to the present embodiment. The sheet post-processing apparatus 100 is installed on the side of an image forming apparatus (not shown), and a sheet P image-formed by the image forming apparatus from a receiving port 80 provided on the side wall of the sheet post-processing apparatus 100 is placed in the apparatus. The sheet P is received and the sheet P is folded.

  In the sheet post-processing apparatus 100, an introduction path 1 for introducing the sheet P into the apparatus through the receiving port 80, a conveyance path 2 for conveying the sheet P to the sheet discharge tray 22, and an intermediate stacking of the sheets P. And a conveyance path 4 for conveying the sheet bundle in which the sheet length center portion is saddle-stitched in the conveyance path 3 to the sheet folding portion.

  An inlet roller pair 10 and an inlet sensor 13 are arranged near the inlet 80 of the introduction path 1. The inlet sensor 13 detects that the sheet P has been carried into the sheet post-processing apparatus 100 from the inlet 80. Then, the inlet roller pair 10 conveys the sheet P toward the downstream side in the sheet conveyance direction of the introduction path 1.

  A sheet punching unit 200 for making a hole in the sheet P is disposed downstream of the inlet roller pair 10 of the introduction path 1 in the sheet transport direction, and the transport roller is further downstream of the sheet punching unit 200 in the sheet transport direction. The pair 11 and the conveyance roller pair 12 are arranged, and the sheet P is conveyed from the introduction path 1 to the conveyance path 3 through these. The conveyance roller pair 12 can be moved in the vertical direction within the sheet post-processing apparatus 100 by a shift mechanism (not shown).

  Further, a branching claw 20 for switching the conveyance destination of the sheet P to the conveyance path 2 or the conveyance path 3 is provided on the downstream side of the introduction path 1 with respect to the conveyance roller pair 11 in the sheet conveyance direction. The conveyance path 2 is a path for conveying the sheet P conveyed through the introduction path 1 to the paper discharge tray 22, and the sheet P whose traveling direction is changed by the branching claw 20 from the introduction path 1 passes through the conveyance path 2. The paper is conveyed from the discharge port 81 to the paper discharge tray 22 by the discharge roller 21 provided at the downstream end portion of the conveyance path 2 in the sheet conveyance direction.

  In the transport path 3, a transport roller 33, a driven roller 31, a paper discharge sensor 35, and the like are arranged. In the sort mode, the transport roller pair 12 in the introduction path 1 moves the sheet P by a shift mechanism by a driving unit (not shown). By moving a certain amount downward (perpendicular to the conveying direction) during nipping and conveying, the position of the sheet P held by the conveying roller pair 12 is also shifted downward by a certain amount. As a result, the sheet P is guided from the introduction path 1 to the conveyance path 3, and the sheet P is nipped and conveyed by the conveyance roller 33 and the driven roller 31, whereby the sheet P is discharged from the discharge port 82 to the discharge tray 32. Then they are stacked one after another.

  The driven roller 31 is provided so as to be swingable so as to be in contact with and away from the conveying roller 33. The contact roller of the driven roller 31 with respect to the conveying roller 33 causes the sheet P to move between the conveying roller 33 and the driven roller 31. A closed state in which the sheet P is nipped and conveyed and discharged to the sheet discharge tray 32 and an open state in which the sheet P is not nipped by the conveyance roller 33 and the driven roller 31 can be selectively taken. When the sheet P is guided from the introduction path 1 to the conveyance path 3 by the shift operation of the sheet P by the conveyance roller pair 12 in the introduction path 1, the conveyance roller 33 and the driven roller 31 are separated from each other and opened. After the shifting operation of the sheet P is completed, the conveying roller 33 and the driven roller 31 are brought into contact with each other to be in a closed state, and the sheet P is nipped and conveyed by the conveying roller 33 and the driven roller 31 to be discharged from the discharge port 82 to the discharge tray 32. P is discharged.

  In the vicinity of the upper side of the discharge port 82 on the side wall where the discharge port 82 of the sheet post-processing apparatus 100 is formed, the front end is in contact with the position near the center of the surface of the sheet P stacked on the discharge tray 32. A filler 34 that is rotatable around the attached root portion is provided. In the vicinity of the base portion of the filler 34, there is an upper surface detection sensor (not shown) that detects the height position of the front end portion of the filler 34, and sheets stacked on the paper discharge tray 32 based on the detection result of the upper surface detection sensor. The loading height of P is detected.

  When the stacking number of sheets P increases due to an increase in the number of stacked sheets on the discharge tray 32, and the filler 34 rotates upward and the upper surface detection sensor is turned on, the sheet post-processing apparatus 100 is provided. A control unit (not shown) controls drive means (not shown) for moving the paper discharge tray 32 up and down to lower the paper discharge tray 32. When the discharge tray 32 is lowered and the filler 34 is rotated downward in conjunction therewith, the upper surface detection sensor is turned off, and the control unit controls the driving means to stop the lowering of the discharge tray 32. Such an operation is repeated, and when the discharge tray 32 reaches the specified tray full height, the control unit of the sheet post-processing apparatus 100 issues a stop signal to the image forming apparatus and stops the image forming operation in the image forming apparatus. Let

  Further, a staple tray 36 and a hitting roller 30 are arranged on the conveyance path 3, and a stapler 41 divided by a driver and a clincher that advance and retreat in a direction perpendicular to the paper surface is arranged at the end position of the conveyance path 3. Further, jogger fences 37 and 38 for moving the sheet P on the staple tray 36 and moving in a direction orthogonal to the paper surface are provided.

  The sheet P conveyed from the introduction path 1 to the conveyance path 3 is guided onto the staple tray 36 and is aligned in the width direction by the jogger fences 37 and 38. Further, the hitting roller 30 performs a pendulum motion counterclockwise in the drawing and comes into contact with the upper surface of the sheet, so that the sheet P is switched back to the stapler 41 side and the rear end of the sheet is abutted against the reference fences 39 and 40. Align the vertical position of P. In this way, in the sheet P in which the position in the width direction and the position in the vertical direction are aligned, the stapler 41 moves in a direction perpendicular to the paper surface of the sheet P in the end binding mode, and staples the appropriate position at the lower edge of the sheet bundle. It is bound by. Thereafter, the sheet bundle is nipped and conveyed by the driven roller 31 and the conveyance roller 33 so that the sheet bundle is discharged onto the sheet discharge tray 32.

  In the saddle stitching mode, the sheet trailing edge is clamped by the clamp movable fences 120 and 121 after the width direction position and the longitudinal direction position of the sheet P are aligned and the stapling is completed. Further, the reference fences 39 and 40 are retracted to a position outside the width in the width direction of the sheet P so as not to disturb the sheet conveyance.

  The clamp movable fences 120 and 121 are attached to the clamp longitudinal axis 106 arranged outside the side plate, and move in the vertical direction and the horizontal direction along the curved conveyance path 4. The vertical movement of the clamp movable fences 120 and 121 moves along the clamp vertical axis 106, and the horizontal movement of the clamp movable fences 120 and 121 is the same track as the transport path 4 and is formed on the apparatus side plate. It moves along the guide rail 110. By moving the movable clamp fences 120 and 121 in this way, the sheet P with the rear end of the sheet held between the movable clamp fences 120 and 121 corresponds to the sheet size along the path of the conveyance path (guide rail 110). The sheet is conveyed to a predetermined position, and is stapled by being stapled by a stapler 41 at an appropriate position in the sheet length center portion. The predetermined position corresponding to the sheet size is a position sent by a predetermined pulse from the position of the clamp movable fence home position sensor 49.

  The saddle stitched sheet P is conveyed downward along the conveyance path 4 by the clamp movable fences 120 and 121, and the sheet P is conveyed when the sheet length center portion is at the position of the folding blade 203 provided in the conveyance path 4. Stop and move to folding process. The stop position of the sheet P is a position where a lower end portion of the sheet P in the conveyance path 4 is detected by the folding position sensor 118 and a predetermined pulse corresponding to the sheet size is sent.

  The sheet length center portion stopped at the folding position is introduced into the press folding portion by the folding blade 203 and the conveying rollers 206 and 207. The sheet P is folded in the middle direction by pressing the sheet length center portion introduced into the press folding portion with the press plates 219 and 220 from above and below. The half-folded sheet P is discharged onto the saddle stitching tray 62 by the conveying rollers 206 and 207 and the discharge roller pair 58.

  The sheet P discharged to the saddle stitching tray 62 is pressed by a sheet pressing roller 61 attached to the sheet pressing member 60, and the folded sheet P swells and becomes a mechanism that does not interfere with the discharge of the next discharged sheet. ing.

  In the present embodiment, the sheet punching unit 200 and the half-folding unit 300 having the conveyance path 4 are detachable, and the sheet post-processing apparatus 100 can be provided according to the needs of the user. It is a possible configuration.

FIG. 3 is a perspective view of the press folding portion, and FIG. 4 is a side view of the press folding portion.
The press folding section is configured by a press plate driving cam 201, a folding blade driving cam 202, a folding blade 203, a folding blade support bar 204, a side plate 205, and the like.

  When the folding blade drive cam 202 rotates, the folding blade support rod 204 moves horizontally by the cam groove 202a, and the folding blade 203 moves in the direction of arrow Q in the figure to guide the sheet length center portion of the sheet P to the press folding portion. To do.

  Next, a press folding unit that folds the sheet P guided by the folding blade 203 will be described.

  FIG. 5 is a configuration diagram of the press folding unit in a state where the press plate driving cam 201, the folding blade driving cam 202, and the side plate 205 are removed from FIG. FIG. 6 is a side view of the press fold when the press fold shown in FIG. 5 is viewed from the side.

  The press folding portion indicated by the dotted line in FIG. 6 is composed of conveying rollers 206 and 207, a moving plate 208, press guide rollers 211 and 212, press pressure releasing cams 209 and 210, and the like.

  The conveying roller 206 and the conveying roller 207 sandwich and convey the folding leading end portion of the sheet P guided by the folding blade 203 to the press folding portion.

  Further, by rotating the press plate drive cam 201 (not shown), the movable plate support bar 255 fitted in the groove of the press plate drive cam 201 moves horizontally. Along with this horizontal movement, the press guide rollers 211 and 212 and the press pressure releasing cams 209 and 210 connected to the moving plate 208 are structured to be horizontally movable.

  FIG. 7 is a perspective view of the press folding unit with the moving plate 208 removed from FIG. FIG. 8 is a side view of the press fold portion as viewed from the side of the press fold portion with the dotted line portion H in FIG. 7 enlarged.

  Pressurizing springs (not shown) are provided at the four corners of each of the upper press unit 217 and the lower press unit 218, and pressure is applied by a total of eight pressing springs.

  In the standby state, the upper press unit 217 and the lower press unit 218 are separated from each other by the press pressure release cams 209 and 210 provided inside the moving plate 208, and this state is the reception state of the folded leading end portion of the sheet P. It is.

  When the moving plate 208 moves in the direction of the arrow Q, the press pressure release cams 209 and 210 connected to the moving plate 208 move in the direction of the arrow Q in conjunction with the movement of the moving plate 208, and the roller 213 of the upper unit 217 in the press. , 215 and the rollers 214, 216 of the lower press unit 218 are moved in the direction of arrow A (downward) and the direction of arrow B (upward) in FIG. 8 by the inclined surfaces of the press pressure releasing cams 209, 210. Thereby, the press upper unit 217 moves in the direction of arrow A (downward) in FIG. 8, and the press lower unit 218 moves in the direction of arrow B (upward) in FIG.

  FIG. 9 is a view showing the inside of the press folding section shown in FIG. FIG. 10 is a side view of the press fold when the press fold shown in FIG. 9 is viewed from the side.

  A press plate 219 and a press plate 220 are connected to the inside of the press upper unit 217 and the press lower unit 218 in the press folding portion, and the press pressure release cams 209 and 210 are moved to interlock with the press upper unit 217. The press plate 219 moves in the direction of arrow A in FIG. 10, and the press plate 220 moves in the direction of arrow B in FIG. 10 in conjunction with the lower press unit 218, so that the sheet P moves between the press plate 219 and the press plate 220. And the sheet P is folded.

  The press guide rollers 211 and 212 are connected to a moving plate 208 (not shown). In conjunction with the movement of the moving plate 208 in the arrow Q direction (see FIG. 6), the press guide roller 211 moves in the arrow A direction and presses the press plate 219 and moves on the press plate 219 in the arrow Q direction. Further, in conjunction with the movement of the moving plate 208 in the arrow Q direction, the press guide roller 212 moves in the arrow B direction and moves on the press plate 220 in the arrow Q direction while pressing the press plate 219.

  Accordingly, the grooves 221 and 222 formed on the side surface of the upper press unit 217 and the grooves 223 and 224 formed on the side surface of the lower press unit 218 shown in FIG. 8 are movably fitted along the respective groove shapes. However, rollers 261 and 262 attached to the corners of the longitudinal end of the press plate 219 via brackets 251 and 252 and rollers attached to the corners of the longitudinal end of the press plate 220 via brackets 253 and 254, respectively. The press plates 219 and 220 that can be rotated by 263 and 264 are bent toward the folding front end portion of the sheet P by the curved shape.

FIG. 11 is a schematic diagram showing the relationship between the moving plate 218 and the press plates 219 and 20.
The moving plate 208 is provided with grooves in which the end portions of the press pressure release cams 209 and 210 and the press guide rollers 211 and 212 are fitted. The upper press unit 217 is provided with a press plate 219 and rollers 213, 215, and 270, and the lower press unit 218 is provided with a press plate 220 and rollers 214, 216, and 271.

  FIG. 11A is a diagram illustrating a state where the upper press unit 217 and the lower press unit 218 are separated from each other. When the rollers 213, 214, 215, and 216 run on the press pressure release cams 209 and 210 in the vertical direction, the upper press unit 217 and the lower press unit 218 are separated from each other.

  Since the press guide rollers 211 and 212 are in contact with the press plates 219 and 220, when the upper press unit 217 and the lower press unit 218 are separated, they move together with the press plates 219 and 220 in the separating direction. .

  FIG. 11B, FIG. 11C, and FIG. 11D are diagrams illustrating a state when the sheet P is pressed. By moving the moving plate 208 from the position in FIG. 11A to the left in the drawing, the press guide rollers 211 and 212 move horizontally in the left in the drawing. The press guide rollers 211 and 212 press the press plates 219 and 220 by a spring (not shown), and the posture of the press plates 219 and 220 changes by moving horizontally while pressing on the curved press plates 219 and 220. However, the pressure position changes.

  FIG. 11 (e) is a view when the moving plate 208 is further moved from the position of FIG. 11 (d) to the left in the drawing, and the rollers 215, 216 are arranged in the vertical direction of the press pressure release cams 209, 210. , 270, 271 ride on, the upper press unit 217 and the lower press unit 218 are separated from each other.

[Configuration example 1]
FIG. 12 is an overall flowchart regarding press folding controlled by a control unit provided in the sheet post-processing apparatus 100. The sheet P1 is an odd-numbered sheet, and the sheet P2 is an even-numbered sheet.

  The sheet P1 is transported to a position where the sheet length center portion comes into contact with the folding blade 203 (S1).

  The folding blade 203 is moved, and the portion corresponding to the fold of the sheet P1 is introduced to the nip portion of the conveying rollers 206 and 207 (S2).

  By driving a conveyance motor (not shown) that is a driving source of the conveyance rollers 206 and 207, the sheet P1 folded by the folding blade 203 is introduced to the press folding section (S3).

  By moving the press plates 219 and 220 to the position shown in FIG. 1B, the sheet P1 introduced into the press folding portion is pressed (S4).

  By pressing the press plates 219 and 220 from the position shown in FIG. 1B to the position shown in FIG. 1C and the position shown in FIG. 1D, pressure is applied to the sheet P1 introduced into the press folding section. The position is moved in the forward direction of the conveying direction (from the upstream side to the downstream side in the conveying direction), and the pressing process is performed on the sheet P1 (S5).

  By moving the press plates 219 and 220 to the position of FIG. 1E, the press plates 219 and 220 are separated from the sheet P1 (S6).

  The pressed sheet P1 is discharged by the conveying rollers 206 and 207 and the discharge roller pair 58 (S7).

  When the folding process is performed on the next sheet P2, the process proceeds to S9. When the folding process is not performed, the series of control is terminated. If there is no next sheet, the press plates 219 and 220 may be moved to the position shown in FIG. 1A (S8).

  The sheet P2 is conveyed to a position where the sheet length center portion comes into contact with the folding blade 203 (S9).

  The folding blade 203 is moved, and the portion corresponding to the fold of the sheet P2 is introduced to the nip portion of the conveying rollers 206 and 207 (S10).

  By driving a conveyance motor (not shown) which is a driving source of the conveyance rollers 206 and 207, the sheet P2 folded by the folding blade 203 is introduced to the press folding section (S11).

  By moving the press plates 219 and 220 to the position shown in FIG. 1 (f), the sheet P2 introduced into the press folding portion is pressurized (S12).

  By pressing the press plates 219 and 220 from the position shown in FIG. 1 (f) to the position shown in FIG. 1 (g) and the position shown in FIG. 1 (h), pressure is applied to the sheet P2 introduced into the press folding section. The position is moved in the direction opposite to the conveying direction, and the pressing process is performed on the sheet P2 (S13).

  By moving the press plates 219 and 220 to the position of FIG. 1A, the press plates 219 and 220 are separated from the sheet P2 (S14).

  The pressed sheet P2 is discharged by the conveying rollers 206 and 207 and the discharge roller pair 58 (S15). Further, when the folding process is performed on the next sheet, the process proceeds to S1, and when the folding process is not performed, the series of control is terminated (S16).

  As shown in FIG. 12, when pressing consecutive sheets, the pressure position on the sheet is in the forward direction of the sheet conveying direction (from the upstream side to the downstream side in the conveying direction) for odd-numbered sheets. The press plates 219 and 220 are moved and pressed so as to move, and for even-numbered sheets, the pressure position on the sheet moves in the direction opposite to the sheet conveying direction (from the downstream side to the upstream side in the conveying direction). Thus, the press plates 219 and 220 are moved and pressed.

  Here, after the press process is performed on the sheet, the press plates 219 and 220 are controlled to return the press plates 219 and 220 from the position of FIG. 1D to the position of FIG. Productivity deteriorates by the time required to return to the position 1 (a) (standby position). For example, if the time required to press one part of the sheet with the press plates 219 and 220 is 0.5 [s], the time required to press the 20 parts sheet is not used in this control. 0.5 [s] × 20 parts = 10 [s]. On the other hand, when this control is used, 0.5 [s] × 20 parts / 2 = 5 [s], and the time required for pressing by using this control is 10 [s] −5 [s] = 5 [s]. ] Can be shortened.

  FIG. 1 is a simplified diagram showing the positional relationship between the sheets P1 and P2 and the press plates 219 and 220 in the overall flow relating to press folding.

  The sheet P 1 is an odd-numbered sheet, the sheet P 2 is an even-numbered sheet, and K is a position where the sheet is pressed by the press plates 219 and 220.

  When the odd-numbered sheet P1 is introduced into the folded portion, the position shown in FIG. 1B, which is the position where the sheet P1 is pressed, and the position where the sheet P1 is pressed are shown in FIG. By moving the press plates 219 and 220 to the position shown in FIG. 1D, which is the position where the press to the sheet P1 is finished, the pressure position K to the sheet P1 is the forward direction (upstream in the transport direction). The sheet P1 is pressed from the side to the downstream side. Thereafter, the press plates 219 and 220 are moved away from each other to the position shown in FIG. 1E, and the odd-numbered sheet P1 is discharged.

  When the even-numbered sheet P2 is introduced into the folding part, the position shown in FIG. 1 (f), which is the position where the sheet P2 is pressed, and the position where the sheet P2 is pressed are shown in FIG. 1 (g). By moving the press plates 219 and 220 to the position shown in FIG. 1H, which is the position where the press to the sheet P2 is finished, the pressure position K to the sheet P2 is the forward direction in the transport direction (upstream in the transport direction). The sheet P2 is pressed from the side to the downstream side. Thereafter, the press plates 219 and 220 are moved away from each other to the position shown in FIG. 1A, and the even-numbered sheet P2 is discharged.

  In this configuration example, the pair of press plates 219 and 220 both have a curved shape, but the same effect can be obtained even when the shape is curved only on one side. Further, in this configuration example, the press plates 219 and 220 operate from the position of FIG. 1B to the position of FIG. 1D at the odd-numbered portion, and the press plates 219 and 220 at the even-numbered portion. Is operated by moving from the position shown in FIG. 1 (f) to the position shown in FIG. 1 (h). The press plates 219 and 220 in the odd-numbered portions are moved from the position shown in FIG. 1 (f) to FIG. The press plate 219, 220 in the even-numbered portion may be operated from the position shown in FIG. 1B to the position shown in FIG.

[Configuration example 2]
FIG. 13 is a flowchart showing another example of the entire flow related to press folding controlled by the control unit provided in the sheet post-processing apparatus 100. The sheet P1 is an odd-numbered sheet, and the sheet P2 is an even-numbered sheet.

  The sheet P1 is transported to a position where the sheet length center portion comes into contact with the folding blade 203 (S1).

  The folding blade 203 is moved, and the portion corresponding to the fold of the sheet P1 is introduced to the nip portion of the conveying rollers 206 and 207 (S2).

  By driving a conveyance motor (not shown) that is a driving source of the conveyance rollers 206 and 207, the sheet P1 folded by the folding blade 203 is introduced to the press folding section (S3).

  By moving the press plates 219 and 220 to the position shown in FIG. 1B, the sheet P1 introduced into the press folding portion is pressurized (S4).

  By pressing the press plates 219 and 220 from the position shown in FIG. 1B to the position shown in FIG. 1C and the position shown in FIG. 1D, pressure is applied to the sheet P1 introduced into the press folding section. The position is moved in the forward direction of the conveying direction (from the upstream side to the downstream side in the conveying direction), and the pressing process is performed on the sheet P1 (S5).

  By moving the press plates 219 and 220 to the position of FIG. 1E, the press plates 219 and 220 are separated from the sheet P1 (S6).

  The pressed sheet P1 is discharged by the conveying rollers 206 and 207 and the discharge roller pair 58 (S7).

  When the folding process is performed on the next sheet P2, the process proceeds to S9. When the folding process is not performed, the series of control is terminated. When there is no next sheet P2, the press plates 219 and 220 may be moved to the position shown in FIG. 1A (S8).

  The sheet P2 is conveyed to a position where the sheet length center portion comes into contact with the folding blade 203 (S9).

  The folding blade 203 is moved, and the portion corresponding to the fold of the sheet P2 is introduced to the nip portion of the conveying rollers 206 and 207 (S10).

  By driving a conveyance motor (not shown) which is a driving source of the conveyance rollers 206 and 207, the sheet P2 folded by the folding blade 203 is introduced to the press folding section (S11).

  By holding a conveyance motor (not shown) which is a driving source of the conveyance rollers 206 and 207, the sheet P2 is held and held by the conveyance rollers 206 and 207 to perform holding (S12). The hold here is control for preventing the sheet P2 from moving in the reverse direction of the conveyance direction (from the downstream side to the upstream side in the conveyance direction) due to the movement of the press plates 219 and 220 performed in S11.

  By moving the press plates 219, 220 to the position of FIG. 1 (f), the front end of the sheet P2 is pressurized (S13).

  The press plates 219 and 220 are moved from the position shown in FIG. 1 (f) to the position shown in FIG. 1 (g), thereby pressing between the press start position and the press intermediate position (S14).

  By releasing the hold of a transport motor (not shown) that is a driving source of the transport rollers 206 and 207, the hold of the sheet P2 by the transport rollers 206 and 207 is released (S15). The release of the hold here is control for reducing the bending of the sheet that occurs during the press process in the reverse direction of the transport direction (from the downstream side to the upstream side in the transport direction) to prevent wrinkles due to the press process. . In this configuration example, the hold release is performed after the press plates 219 and 220 are moved to the position shown in FIG. 1G. However, it is desirable that the press plates 219 and 220 are immediately after the front end of the sheet P2 is pressed.

  The press plates 219 and 220 are moved from the position shown in FIG. 1 (g) to the position shown in FIG. 1 (h), thereby pressing between the press intermediate position and the press end position (S16).

  The press plates 219 and 220 are moved to the position shown in FIG. 1A, and the press plates 219 and 220 are separated from the sheet P2 (S17).

  The pressed sheet P2 is discharged by the conveying rollers 206 and 207 and the discharge roller pair 58 (S18). Further, when the folding process is performed on the next sheet, the process proceeds to S1, and when the folding process is not performed, a series of control is terminated (S19).

[Configuration example 3]
FIG. 14 is a flowchart showing another example of the overall flow related to press folding controlled by the control unit provided in the sheet post-processing apparatus 100. The sheet P1 is an odd-numbered sheet, and the sheet P2 is an even-numbered sheet.

  The nth sheet P1 is transported to a position where the sheet length center portion comes into contact with the folding blade 203 (S1).

  The folding blade 203 is moved, and a portion corresponding to the fold of the nth sheet P1 is introduced to the nip portion of the conveying rollers 206 and 207 (S2).

  By driving a conveyance motor (not shown) that is a driving source of the conveyance rollers 206 and 207 and the discharge roller pair 58, the nth sheet P1 folded by the folding blade 203 is transferred to the press folding portion by the conveyance rollers 206 and 207. Introduce (S3).

  The press plates 219 and 220 are moved sequentially from the position shown in FIG. 1B to the position shown in FIG. 1C, the position shown in FIG. 1D, and the position shown in FIG. A press process is performed on the introduced nth sheet P1 (S4).

  If the next n + 1 sheet P2 is folded, the process proceeds to S6. If the folding process is not performed, the nth sheet P1 is discharged by the transport rollers 206 and 207 and the discharge roller pair 58. (S16), a series of control ends (S5).

  The pressed n-th sheet P1 is discharged by the conveying rollers 206 and 207 and the discharge roller pair 58 (S6).

  When it is detected that the trailing edge of the nth sheet P1 has passed through the nip portion of the transport rollers 206 and 207 (yes in S7), the position where the sheet length center portion of the n + 1th sheet P2 contacts the folding blade 203 (S8). The sheet trailing edge detection of the nth sheet P1 here may be detected by providing a sensor in the vicinity of the conveyance rollers 206 and 207, or the sheet size of the nth sheet P1 is acquired and the conveyance roller 206 is detected. , 207, by driving the conveying rollers 206, 207 and the discharge roller pair 58 by the size of the sheet folded in half, the trailing edge of the sheet P1 has passed through the nip portions of the conveying roller pairs 206, 207. It may be detected.

  When it is detected that the trailing edge of the nth sheet P1 has passed through the nip portion of the discharge roller pair 58 (Yes in S9), the transport rollers 206 and 207 and the discharge roller pair 58 are stopped (S10). The sheet trailing edge detection of the nth sheet P1 here may be detected by providing a sensor in the vicinity of the discharge roller pair 58, or the sheet size of the nth sheet P1 is acquired and the conveying roller 206 is detected. , 207, the sheet size folded in half + the distance between the transport rollers 206, 207 and the paper discharge roller pair 58, and driving the transport rollers 206, 207, the paper discharge roller pair 58, and the rear of the sheet P1. It may be detected that the end has passed through the nip portion of the discharge roller pair 58.

  The folding blade 203 is moved, and the portion corresponding to the fold of the (n + 1) th sheet P2 is introduced to the nip portion of the conveying rollers 206 and 207 (S11).

  By driving a conveyance motor (not shown) which is a driving source of the conveyance rollers 206 and 207 and the discharge roller pair 58, the n + 1th sheet P2 folded by the folding blade 203 is moved to the press folding portion by the conveyance rollers 206 and 207. Introduce (S12).

  The press plates 219 and 220 are sequentially moved to the position shown in FIG. 1 (f), the position shown in FIG. 1 (g), the position shown in FIG. 1 (h), and the position shown in FIG. The n + 1th sheet P2 thus subjected is pressed (S13).

  If the next sheet is to be folded, the process proceeds to S1. If the folding process is not to be performed (No in S14), the n + 1th sheet P2 that has been pressed is transported to the transport rollers 206 and 207 and discharged. The paper is discharged by the roller pair 58 (S15), and a series of control is finished.

  In the above configuration example, the conveyance rollers 206 and 207 and the discharge roller pair 58 have the same drive source and cannot be driven separately. However, a drive source such as a clutch or a motor is added to carry the conveyance rollers. The rollers 206 and 207 and the discharge roller pair 58 are configured to be driven separately, and control for stopping the driving of the transport rollers 206 and 207 is added immediately before S1 and S8 shown in FIG. Alternatively, damage such as rubbing of the sheet transported in S8 by the rotating transport rollers 206 and 207 may be reduced.

As described above, according to the present embodiment, the folding blade 203 that is a blade member that presses the sheet P toward the press folding portion that is a paper folding portion that presses the sheet surface at the tip and folds the sheet P that is paper, And press plates 219 and 220 which are a pair of sandwiching members that are disposed in the press folding portion and sandwich the sheet P pushed into the press folding portion by the folding blade 203. The sheet P is sandwiched between the press plates 219 and 220. In the sheet post-processing apparatus 100 that is a sheet folding apparatus that performs folding processing on the sheet P, the press plates 219 and 220 can sandwich the sheet P while changing the sandwiching position of the sheet P in the pushing direction of the sheet P by the folding blade 203. The pressing plate 219 moves so that the sandwiching position moves in the same direction as the pushing direction. Control means for controlling the press plates 219 and 220 so that the sheet P is sandwiched by 220 and the sheet P is sandwiched by the press plates 219 and 220 so that the sandwiching position moves in the direction opposite to the pushing direction. It has a control part. In the present embodiment, the sheet P is sandwiched by the press plates 219 and 220 from the upstream side in the pushing direction toward the downstream side in the pushing direction, or the sheet P is sandwiched from the downstream side in the pushing direction toward the upstream side in the pushing direction. can do. Accordingly, for example, after performing the folding process of sandwiching the sheet P from the upstream side in the pressing direction toward the downstream side in the pressing direction, the next sheet P is upstream in the pressing direction from the downstream side in the pressing direction. The sheet P can be sandwiched and the folding process can be performed. Therefore, since the next sheet P can be sandwiched from the side where the previous sheet P is sandwiched by the press plates 219, 220, the next sheet P is sandwiched from the same side as the previous sheet P. Since it is not necessary to operate the press plates 219 and 220 so that the sheet can be started, the time from the completion of the folding process of the previous sheet P to the start of the folding process of the next sheet P can be shortened, and the productivity is improved. Can be achieved.
Further, according to the present embodiment, the nipping start position when the sheet P is nipped by the press plates 219 and 220 so that the nipping position moves in the same direction as the pushing direction, and the nipping position is opposite to the pushing direction. When the sheet P is nipped by the press plates 219 and 220 so as to move in the direction, the nipping end position is the same position, and the sheet is moved by the press plates 219 and 220 so that the nipping position moves in the same direction as the pushing direction. The pinching end position when pinching P is the same position as the pinching start position when the sheet P is pinched by the press plates 219 and 220 so that the pinching position moves in the direction opposite to the pressing direction. As a result, the sandwiching of the next sheet P is started from the sandwiching end position of the previous sheet P. Therefore, the press plates 219, 220 are always placed at the same position of the sheet P sandwiched by the press plates 219, 220. There is no need to move. Therefore, the time from the completion of the folding process of the previous sheet P to the start of the folding process of the next sheet P can be shortened, and the productivity can be improved.
Further, according to the present embodiment, the press plates 219 and 220 are a pair of plate-like members that are arranged so that the side surfaces thereof face each other and at least one is curved, and swing the press plates 219 and 220. While the sheet P is sandwiched between the convex side surface of the curved press plate 219 and the side surface of the other press plate 220, the position of the sheet P is changed in the direction in which the sheet P is pushed by the folding blade 203. Can be sandwiched.
Further, according to the present embodiment, the conveying rollers 206 and 207 as a pair of rollers are provided on the upstream side of the pressing plates 219 and 220 in the pressing direction, and the sandwiching position is in the direction opposite to the pressing direction. When the sheet P is sandwiched between the press plates 219 and 220 so as to move, the sheet P is held and held by the conveying rollers 206 and 207 when the leading end of the sheet P is sandwiched between the press plates 219 and 220. Thereby, it can suppress that the sheet | seat P returns to the said pushing direction upstream, and a reliable folding process can be performed.
In addition, according to the present embodiment, after the leading end portion of the sheet P is sandwiched between the press plates 219 and 220, the sheet P generated during the folding process is released by releasing the gripping of the sheet P by the conveying rollers 206 and 207. Since the bending of the sheet P can be reduced, creases occurring in the sheet P can be reduced.
Further, according to the present embodiment, the discharge roller pair 58 that is a sheet transfer unit that transfers the sheet P that has been subjected to the folding process by the press plates 219 and 220, and the sheet P that is transferred by the discharge roller pair 58 are A sheet detecting means for detecting that the predetermined position of the press folding portion has been reached, and a folding blade for the sheet P to be subjected to the next folding processing based on the timing when the sensor detects the sheet P. 203 determines the timing of pushing into the press folding section. As a result, during the time from the completion of the folding process of the nth sheet P until the sheet is discharged, the next sheet P is conveyed to the introduction section of the press folding section, thereby narrowing the space between successive sheets P. Therefore, productivity can be improved.

DESCRIPTION OF SYMBOLS 1 Introduction path 2 Conveyance path 3 Conveyance path 4 Conveyance path 10 Inlet roller pair 11 Conveyance roller pair 12 Conveyance roller pair 13 Inlet sensor 20 Branch claw 21 Discharge roller 22 Discharge tray 30 Tapping roller 31 Driven roller 32 Discharge tray 33 Conveyance roller 34 Filler 35 Paper discharge sensor 36 Staple tray 37 Jogger fence 38 Jogger fence 39 Reference fence 40 Reference fence 41 Stapler 49 Clamp movable fence home position sensor 58 Paper discharge roller pair 60 Sheet pressing member 61 Sheet pressing roller 62 Saddle stitching tray 80 Entrance 81 Discharge port 82 Discharge port 100 Sheet post-processing device 106 Clamp longitudinal axis 110 Guide rail 118 Position sensor 120 Clamp movable fence 121 Clamp movable fence 200 Sheet punching Unit 201 Press plate drive cam 202 Blade drive cam 202a Groove 203 Folding blade 204 Blade support rod 205 Side plate 206 Transport roller 207 Transport roller 208 Moving plate 209 Press pressure release cam 210 Press pressure release cam 211 Press guide roller 212 Press guide roller 213 Roller 214 Roller 215 Roller 216 Roller 217 Press upper unit 218 Press lower unit 219 Press plate 220 Press plate 221 Groove 222 Groove 223 Groove 224 Groove 251 Bracket 252 Bracket 253 Bracket 254 Bracket 255 Moving plate support rod 261 Roll 262 Roll 264 Roll 263 Roll 270 Roll Coro 271 Coro 300 Middle folding unit

JP 2004-210436 A

Claims (6)

A blade member that pushes the paper toward the paper folding section that presses the paper surface at the tip and folds the paper;
A pair of sandwiching members that are disposed in the sheet folding unit and sandwich the sheet pushed into the sheet folding unit by the blade member;
In the paper folding apparatus that performs the folding process on the paper by sandwiching the paper with the pair of sandwiching members,
The pair of sandwiching members can sandwich the sheet while changing the sandwiching position with respect to the sheet in the pushing direction of the sheet by the blade member,
A sheet is sandwiched by the sandwiching member so that the sandwiching position moves in the same direction as the pushing direction, or a sheet is sandwiched by the sandwiching member so that the sandwiching position moves in a direction opposite to the pushing direction. A sheet folding device comprising a control means for controlling the sandwiching member. The paper folding apparatus according to claim 1.
The nipping start position when the sheet is nipped by the nipping member so that the nipping position moves in the same direction as the pushing direction, and the nipping member moves the sheet so that the nipping position moves in the direction opposite to the pushing direction. The pinching end position when pinching is the same position,
The nipping end position when the sheet is nipped by the nipping member so that the nipping position moves in the same direction as the pushing direction, and the nipping member moves the sheet so that the nipping position moves in the direction opposite to the pushing direction. A paper folding apparatus, wherein a pinching start position at the time of pinching is the same position. The paper folding apparatus according to claim 1 or 2,
The pair of sandwiching members is a pair of plate-shaped members that are arranged so that the side surfaces thereof face each other, and at least one of them is a curved shape, and the convex shape of the curved plate-shaped member is swung while swinging the plate-shaped member. A sheet folding apparatus, wherein a sheet is sandwiched between a side surface and a side surface of the other plate-like member. In the paper folding apparatus of Claim 1, 2, or 3,
A pair of rollers is provided on the upstream side in the pushing direction from the sandwiching member,
When the sheet is sandwiched by the sandwiching member so that the sandwiching position moves in the direction opposite to the pushing direction, the sheet is sandwiched and held by the roller pair when the leading end of the sheet is sandwiched by the sandwiching member. Paper folding device. The paper folding apparatus according to claim 4.
A sheet folding device, wherein after the leading end of the sheet is nipped by the nipping member, nipping of the sheet by the roller pair is released. The paper folding apparatus according to claim 1, 2, 3, 4 or 5.
A sheet conveying means for conveying the sheet subjected to the folding process by the sandwiching member;
Paper detecting means for detecting that the paper conveyed by the paper conveying means has reached a predetermined position of the paper folding section,
A paper folding apparatus characterized in that, based on the timing at which the paper detection means detects a paper, the timing at which the paper to be folded next is pushed into the paper folding portion by the blade member.

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