JP2012121687A - Folding stripe forming apparatus, post-processing apparatus, image forming apparatus, and image forming system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding stripe forming apparatus that can obtain drive force for forming folding stripes to a folding stripe forming member such as a sheet, with a configuration different from conventional ones; a post-processing apparatus having the folding stripe forming apparatus; an image forming apparatus such as a copying machine, a facsimile, a printer and a printing machine that are equipped with them; and an image forming system that is equipped with them.SOLUTION: The folding stripe forming apparatus includes: a member 412 abutting on one face of the folding stripe forming member P; a member 413 abutting on the other face of the folding stripe forming member P; a folding stripe forming means 414 forming the folding stripes to the folding stripe forming member P; and a drive means 434 making the folding stripe forming means 414 form the folding stripes to the folding stripe forming member P by relatively moving the member 412 and member 413 in the mutually approaching direction. The drive means 434 has a magnetic field generation source 420 that forms a magnetic field for generating the drive force for relatively moving the member 412 and member 413 in the mutually approaching direction.

Description

  The present invention relates to a crease forming device that forms a crease on a crease forming member such as paper, a post-processing device having the crease forming device, an image forming apparatus such as a copying machine, a facsimile, a printer, and a printing device provided with these, The present invention relates to an image forming system comprising:

  2. Description of the Related Art Conventionally, a crease forming apparatus that forms a crease in advance at a position that becomes a crease of a member such as paper that undergoes a folding process is known (see, for example, [Patent Document 1]). Such a crease forming device facilitates the folding process of the crease forming member to which the crease is attached at the position where the crease is formed. That is, a crease forming device is used as a pre-processing device for the fold process in order to solve the problem that a sufficient crease is not formed when a folding process is performed on a sheet or the like on which no crease is formed.

  In addition, when the member subjected to the folding process is a recording medium such as a sheet and the image is formed by an image forming apparatus such as a copying machine, a facsimile, a printer, or a printing apparatus, As described above, the image is used as a pre-processing device for the folding process, and the image is formed at the crease position when the recording medium on which the image is formed is subjected to the folding process by pre-folding the recording medium. It is also used to solve the problem of peeling off.

  For these reasons, the crease forming apparatus is often used as a post-processing apparatus for an image forming apparatus (see, for example, [Patent Document 1]). In addition to the crease forming function, the post-processing apparatus for the image forming apparatus has various functions for the purpose of simplifying storage and handling of recording media, such as alignment including stapling, punching, and sorting. It has been known.

  By the way, a crease forming device generally has a blade-like member that is in contact with one surface of a crease forming member on which a crease is formed, and a member disposed opposite to the member and pressed by the tip of the member. A member that has a groove for receiving the fold forming member, and a member that contacts the other surface of the fold forming member, and a fold line is formed by the leading end of the former member entering the groove. It is common to provide drive means for relatively moving the members (for example, see [Patent Document 1]).

  As such a driving means, conventionally, a configuration has been adopted in which a driving force for driving such a member for forming a folding line is mechanically obtained by a motor, an eccentric cam, a spring, and the like (for example, [Patent Document 1]. 〕reference).

  However, in such a configuration, the driving force may change due to deterioration of the member due to repeated driving, and the fold line may not be formed well over time. In addition, for example, when the crease forming member is thick, it may be preferable to be able to adjust the driving force, such as it is preferable to increase the driving force. Difficult to adjust.

  The present invention relates to a folding line forming device that obtains a driving force for forming a folding line on a folding line forming member such as a sheet in a configuration different from the conventional one, a post-processing apparatus having the same, a copier, a facsimile, a printer, The present invention relates to an image forming apparatus such as a printing apparatus, and an image forming system including these.

  In order to achieve the above object, the invention described in claim 1 includes a first member that abuts on one surface of the folding line forming member, and the other of the folding line forming members that is disposed opposite the first member. A fold line forming means for forming a fold line along a predetermined direction on the fold line forming member, and the first member and the second member adjacent to each other. Drive means for forming a crease line in the crease forming member by the crease formation means by moving in a direction relative to each other, and the drive means connects the first member and the second member to each other. The fold line forming apparatus has a magnetic field generation source for generating a magnetic field for generating a driving force that is relatively moved in an adjacent direction.

  According to a second aspect of the present invention, in the folding line forming apparatus according to the first aspect, the driving means includes a plurality of the magnetic field generation sources along the predetermined direction, and the plurality of the magnetic field generation sources along the predetermined direction. By sequentially operating the magnetic field generation source, the first member and the second member are relatively inclined along the predetermined direction to be folded along the predetermined direction. It is characterized by forming a muscle.

  According to a third aspect of the present invention, in the fold line forming apparatus according to the second aspect, a magnetic field generation source that is operated among the plurality of magnetic field generation sources in accordance with a width of the fold line forming member along the predetermined direction. Is selected.

  According to a fourth aspect of the present invention, in the crease formation device according to any one of the first to third aspects, the magnetic field generation source is an electromagnet.

  According to a fifth aspect of the present invention, in the folding line forming apparatus according to any one of the first to fourth aspects, the driving force is adjusted according to the thickness of the folding line forming member.

  According to a sixth aspect of the present invention, in the crease formation device according to any one of the first to fifth aspects, the magnetic field generated by the magnetic field generation source is out of a region that contributes to generating the driving force. And a conveyance path through which the crease forming member is conveyed.

  A seventh aspect of the present invention is the fold line forming device according to any one of the first to sixth aspects, further comprising a position adjusting means for adjusting a position of the magnetic field generation source in a thickness direction of the fold line forming member. It is characterized by that.

  According to an eighth aspect of the present invention, in the fold line forming apparatus according to the seventh aspect, the position adjusting means is configured to adjust the position of the magnetic field generation source in the thickness direction of the fold line forming member according to the thickness of the fold line forming member. It is driven to adjust the position.

  According to a ninth aspect of the present invention, in the crease forming device according to any one of the first to eighth aspects, the driving means includes a biasing member that generates the driving force.

  According to a tenth aspect of the present invention, there is provided a post-processing apparatus having the crease forming device according to any one of the first to ninth aspects.

  An eleventh aspect of the invention is an image forming apparatus having the crease forming device according to any one of the first to ninth aspects or the post-processing device according to the tenth aspect.

  According to a twelfth aspect of the present invention, there is provided an image having the crease forming apparatus according to any one of the first to ninth aspects, the post-processing apparatus according to the tenth aspect, or the image forming apparatus according to the eleventh aspect. In the forming system.

  The present invention includes a first member that comes into contact with one surface of the folding line forming member, and a second member that is arranged to face the first member and comes into contact with the other surface of the folding line forming member. A folding line forming means for forming a folding line along a predetermined direction in the folding line forming member, and the first member and the second member are moved relative to each other in a direction close to each other. Drive means for forming a crease line in the folding line forming member by the line formation means, and the drive means relatively moves the first member and the second member in directions close to each other. In the folding line forming apparatus having a magnetic field generating source for generating a magnetic field for generating a fold line, a folding line forming apparatus that obtains a driving force for forming a folding line in a folding line forming member by the magnetic field generation source is provided. it can.

  The drive means includes a plurality of the magnetic field generation sources along the predetermined direction, and sequentially operates the plurality of magnetic field generation sources along the predetermined direction, whereby the first member and the second member If the crease is formed in the crease forming member along the predetermined direction by relatively inclining the member along the predetermined direction, the crease is formed in the crease forming member. A fold line forming apparatus capable of continuously forming a fold line can be provided by obtaining a driving force to be generated by sequentially operating a plurality of magnetic field generation sources arranged along the direction in which the fold line is formed.

  If a magnetic field generation source to be operated is selected from among the plurality of magnetic field generation sources according to the width of the fold line forming member along the predetermined direction, a fold line is formed on the fold line forming member. Folding lines can be continuously formed by sequentially operating a plurality of magnetic field generating sources arranged along the direction of forming the folding lines, and consumed to form the folding lines. It is possible to provide a crease formation device in which the energy that is applied is suppressed.

  If the magnetic field generation source is an electromagnet, it is possible to provide a folding line forming apparatus that obtains a driving force for forming a folding line on the folding line forming member using a highly versatile electromagnet as a magnetic field generation source.

  If the driving force is adjusted according to the thickness of the folding line forming member, the driving force for forming the folding line on the folding line forming member is generated according to the thickness of the folding line forming member. Thus, it is possible to provide a crease forming apparatus that can be appropriately obtained.

  If a folding path forming member is transported outside the region that contributes to generating the driving force in the magnetic field generated by the magnetic field generation source, the folding line forming member is folded. It is possible to provide a crease forming apparatus that obtains a driving force for forming a streak from a magnetic field generation source and avoids a decrease in the driving force by a crease forming member.

  If it has position adjustment means for adjusting the position of the magnetic field generation source in the thickness direction of the fold line forming member, the driving force for forming the fold line in the fold line forming member is used as the thickness of the fold line forming member. It is possible to provide a crease formation device obtained by a magnetic field generation source whose position in the direction is adjusted.

  If the position adjusting means is driven so as to adjust the position of the magnetic field generation source in the thickness direction of the folding line forming member according to the thickness of the folding line forming member, the folding line forming member It is possible to provide a folding line forming apparatus capable of appropriately obtaining a driving force for forming a folding line at a position in the thickness direction of the folding line forming member by a magnetic field generation source adjusted according to the thickness. .

  If the driving means has a biasing member that generates the driving force, a folding line forming device that obtains a driving force for forming a folding line on the folding target forming member by the magnetic field generation source and the biasing member. Can be provided.

  Since the present invention is in a post-processing apparatus having such a crease forming apparatus, it is possible to provide a post-processing apparatus that obtains a driving force for forming a crease in a crease forming member using a magnetic field generation source.

  Since the present invention is in such a crease forming apparatus or an image forming apparatus having such a post-processing apparatus, an image forming apparatus that obtains a driving force for forming a crease in a crease forming member by a magnetic field generation source is provided. be able to.

  Since the present invention is in such a crease forming apparatus, or such a post-processing apparatus, or an image forming system having such an image forming apparatus, a driving force for forming a crease on a fold forming member is generated by a magnetic field generation source. An obtained image forming system can be provided.

FIG. 1 is a schematic front view of a folding line forming apparatus to which the present invention is applied and provided as a post-processing apparatus of an image forming apparatus, another post-processing apparatus and an image forming apparatus, and an image forming system constituted by these. It is. FIG. 2 is a control block diagram of the crease forming apparatus and the image forming apparatus shown in FIG. 1. It is the schematic front view which showed operation | movement of the other post-processing apparatus shown in FIG. It is the schematic front view which showed other operation | movement of the other post-processing apparatus shown in FIG. FIG. 2 is a schematic front view showing an operation of a skew correction unit provided in the post-processing apparatus shown in FIG. 1. FIG. 10 is a schematic front view showing another operation of the skew correction unit provided in the post-processing apparatus shown in FIG. 1. It is the schematic which showed the more detailed structure of the crease formation apparatus shown in FIG. It is the schematic which showed the whole operation | movement of the crease forming apparatus shown in FIG. It is the schematic which showed the more detailed structure of the magnetic field generation source with which the crease formation apparatus shown in FIG. 1 was equipped. FIG. 10 is a schematic connection diagram of the magnetic field generation source shown in FIG. 9. It is the schematic which showed the standby state of the crease formation apparatus shown in FIG. It is the schematic which showed the 1st state at the time of operation | movement of the crease formation apparatus shown in FIG. It is the schematic which showed the 2nd state at the time of operation | movement of the crease formation apparatus shown in FIG. It is the schematic which showed the 3rd state at the time of operation | movement of the crease formation apparatus shown in FIG. It is the schematic which showed the 4th state at the time of operation | movement of the crease formation apparatus shown in FIG. It is the schematic which showed the 5th state at the time of operation | movement of the crease formation apparatus shown in FIG. It is the schematic which showed the 6th state at the time of operation | movement of the crease formation apparatus shown in FIG. It is the schematic which showed the 7th state at the time of operation | movement of the crease formation apparatus shown in FIG. It is the schematic which showed the 8th state at the time of operation | movement of the crease formation apparatus shown in FIG. It is the schematic which showed other operation | movement of the crease formation apparatus shown in FIG. It is the schematic which showed the other structural example of the crease forming apparatus shown in FIG.

  FIG. 1 shows an outline of an image forming system to which the present invention is applied. The image forming system 600 is a copying machine as a copying apparatus, which forms a monochromatic image, and a post-processing apparatus 400 that functions as a crease forming apparatus as a post-processing apparatus of the image forming apparatus 100. And a post-processing device 500 as a finisher that functions as a folding processing device for the paper P, which is a recording medium that has passed through the post-processing device 400.

  The image forming apparatus 100 is used as a sheet-like recording medium as a transfer sheet, which is a recording sheet, in addition to plain paper generally used for copying, etc., OHP sheets, cardboard, cardboard, cardboard, etc. It is possible to perform image formation. Therefore, the post-processing devices 400 and 500 can perform post-processing of the paper P that is the recording medium. The image forming apparatus 100 that functions as an upstream machine of the post-processing apparatuses 400 and 500 may be capable of forming a full-color image, or may be a printer, a facsimile, or the like in addition to a copying machine. These two or more types of multifunction peripherals may be used.

  The main body 250 of the image forming apparatus 100 has an image reading device 255 at the upper portion thereof, and a manual paper feed table 258 below the image reading device 255. As shown in FIG. 2, the main body 250 includes a main body control unit 270 that is an image forming apparatus control unit that is an image forming apparatus control unit that controls the entire image forming apparatus 100, and the image forming apparatus 100 by a user. An operation unit 271 for performing various inputs to the entire image forming system 600, and a display unit 272 configured by a liquid crystal display device for notifying the user of various information related to the state of the image forming apparatus 100, etc. Is arranged. The operation unit 271 allows the user to input an image formation start instruction and whether or not to perform a crease formation process on the paper P in the post-processing device 400.

  When the image forming start instruction is given by the operation unit 271, the sheet P fed out from the sheet feeding unit 254 loaded with a large number of sheets P or the sheet P set on the manual sheet feeding table 258 is temporarily stored by the registration rollers 257. It is stopped and conveyed to the image forming unit 256 with timing. The image forming unit 256 forms a latent image corresponding to the image data on a photosensitive member as an image carrier, which is a latent image carrier (not shown), the latent image is developed with toner, and the toner is transferred to the paper P. Fixing is performed by the fixing device 260. The recorded paper P on which the toner has been fixed by the fixing device 260 is discharged by the recorded paper discharge roller 261 to the post-processing device 400 when post-processing is performed. In addition, when the post-processing is not performed, the recorded paper P is conveyed to the upper paper discharge roller 259 by a switching claw (not shown) and discharged to a paper discharge tray (not shown) in the body of the main body 250. Regardless of whether or not post-processing is performed on the recorded paper P, the image forming apparatus 100 may discharge the paper P to the post-processing apparatus 400. The paper discharge tray is not an essential component.

The post-processing device 400 is connected to a side portion of the main body 250 of the image forming apparatus 100.
The post-processing device 400 conveys the main body 401, the entrance sensor 402 that detects that the paper P has entered the main body 401, and the paper P that has passed the detection position of the paper P by the entrance sensor 402 toward the inside of the main body 401. And a pair of entrance conveying rollers 403 as conveying means.

  The post-processing device 400 also has a skew correction unit 404 as a skew correction unit capable of correcting the skew of the paper P conveyed by the pair of entrance conveyance rollers 403, and a crease in the paper P that has passed through the skew correction unit 404. As a folding line forming unit 405 as a folding line forming unit capable of forming a sheet, and a conveying unit that conveys the paper P that has passed through the folding line forming unit 405 from the main body 401 toward the post-processing device 500. A pair of paper discharge rollers 407 is provided.

  As shown in FIG. 2, the post-processing apparatus 400 also includes a control unit 450 serving as a control unit that is a post-processing apparatus control unit that is a post-processing apparatus control unit including a CPU, a memory, and the like that control the entire post-processing apparatus 400. And a display unit 451 configured by a liquid crystal display device for notifying the user of various information regarding the state of the post-processing device 400 and the like.

  As shown in FIG. 1, the skew correction unit 404 includes a transport roller pair 408 as transport means for further transporting the paper P transported by the entrance transport roller pair 403, and the paper P transported by the transport roller pair 408. And an abutting plate 409 as a locking member capable of locking the front end.

  The skew correction unit 404 also abuts against the abutting plate 409 from below, and the rotation of the abutting plate 409 causes the abutting plate 409 to move between a locking position where the leading edge of the paper P is locked and a retracted position that does not interfere with the paper P. And a cam 410 that is an abutting plate driving cam as a locking / non-locking setting member that is displaced and positioned, and a butting plate 409 that occupies the locking position is disposed in correspondence with the contact position of the paper P with the leading edge. A conveyance roller pair 411 as conveyance means for conveying the paper P is provided.

  As shown in FIG. 2, the skew correction unit 404 also moves the upper roller 411 b of the upper roller 411 a and the lower roller 411 b constituting the motor 452 that rotates the cam 410 and the conveying roller pair 411 to the upper roller 411 b. And roller displacing means 453 for displacing the roller 411a so as to be in contact with and away from the roller 411a.

  Whether the skew correction of the paper P is corrected in the skew correction unit 404 depends on whether the user needs to form a crease at the crease formation unit 405 with high accuracy, for example. Can be input.

  Specifically, when the user sets the crease forming unit 405 to form the crease in the operation unit 271, the skew correction unit 404 is set to correct the skew of the paper P. Become. However, even when the crease forming unit 405 is set to form a crease, the operation unit 271 causes the skew correction unit 404 to use the paper for the purpose of saving the time required for skew correction. It is possible to set so that the skew of P is not corrected.

  Further, when the user sets in the operation unit 271 that no crease line is formed in the crease line forming unit 405, the skew correction unit 404 is set not to correct the skew of the paper P. However, even in the case where the crease forming unit 405 is set not to form the crease, for the purpose of preventing the oblique fold from occurring in the fold process performed in the post-processing device 500. The operation unit 271 allows the skew correction unit 404 to make a setting for correcting the skew of the paper P.

  In the operation unit 271, the setting as to whether or not the folding line forming unit 405 forms a folding line on the paper P and the setting as to whether or not the skew correction unit 404 corrects the skew of the paper P are the main body. Recognized by the control unit 270. The main body control unit 270 communicates with the control unit 450 regarding such setting contents.

  As will be described later, the controller 450 drives the motor 452 at a predetermined timing to adjust the phase of the cam 410 and adjusts the phase of the cam 410 according to the latter setting content, and roller displacement means 453 at a predetermined timing. To control the displacement of the lower roller 411b. The control unit 450 also controls the operation of the crease forming unit 405 according to the former setting content, as will be described later. The control unit 450 causes the display unit 451 to display the former setting content and the latter setting content.

  Note that the post-processing apparatus 400 includes a skew detection unit that detects the presence or absence of skew of the paper P, depending on the presence or absence of the skew detected by the skew detection unit or the degree of skew when the skew occurs. The skew correction unit 404 may switch whether or not to correct the skew.

  The crease formation unit 405 is supported by being fixed to the upper base 415 located on the upper surface side, which is one surface of the paper P that becomes a crease forming member when the crease is formed, and the lower surface of the upper base 415. An upper blade 412 as a first member that is a pushing member that comes into contact with the upper surface of the sheet P, and a lower edge of the sheet P is positioned on the lower surface side that is the other surface of the sheet P disposed opposite to the upper blade 412. The upper side of the sheet P has a lower blade 413 as a second member that is a pressing member that contacts the lower surface of the sheet P.

  The crease forming unit 405 is also disposed on the left side of the upper base 415, the upper blade 412, and the lower blade 413, that is, on the downstream side in the transport direction of the paper P in the post-processing device 400, and transports the paper P. The upper roller 406a of the conveying roller pair 406 as the conveying means for conveying in the direction and the upper roller 406a and the lower roller 406b constituting the conveying roller pair 406 is displaced so as to be in contact with and separated from the lower roller 406b. It has the roller displacement means 454 shown in FIG.

The upper blade 412 and the lower blade 413 are folded in a predetermined direction, specifically in a direction perpendicular to the paper surface of FIG. 1, by sandwiching the paper P between the upper blade 412 and the lower blade 413. A fold line forming means 414 as a fold line inserting means for forming a line is configured.
The remainder of the post-processing device 400 will be described later.

  The post-processing device 500 includes a pair of transport rollers 501, 502, 503, and 504 as transport means for transporting the paper P that has passed through the post-processing device 400, and a sheet of the transport roller pairs 501, 502, 503, and 504. The sheet P that has passed through the pair of conveying rollers 501 positioned in the uppermost stream in the conveying direction of P is conveyed as it is to the conveying roller 502 side to be discharged out of the post-processing apparatus 500, or is subjected to folding processing and then the post-processing apparatus 500. A branching claw 505 is provided for switching whether to convey toward the conveying roller pair 503, 504 side for discharging to the outside.

  The post-processing apparatus 500 also stacks a folding processing unit 506 as a folding processing unit that performs a folding process on the paper P that has been transported by the pair of transport rollers 504, and the paper P that has been subjected to the folding processing by the folding processing unit 506. A sheet discharge tray 507 serving as a stacking unit and a sheet discharge tray 508 serving as a stacking unit that stacks the sheets P that have passed through the pair of conveyance rollers 502 are provided.

  The folding processing unit 506 includes a trailing edge fence 509 that receives the trailing edge of the sheet P that has been conveyed by the conveying roller pair 504 from below, and a folding portion that abuts against the middle portion of the sheet P that has received the trailing edge by the trailing edge fence 509. It has a blade 510 as means, and a pair of folding rollers 511 disposed to face the blade 510.

  Although not shown, the folding processing unit 506 includes a displacing means for displacing the rear end fence 509 in the vertical direction, a blade driving means for pushing the blade 510 into the nip portion of the folding roller pair 511, and the folding roller pair 511. It has roller driving means for rotationally driving the blade 510 in the direction of entering the nip, and a control unit for controlling these operations.

  Whether or not the folding process unit 506 performs the folding process on the paper P is set according to the setting of whether or not the folding line forming unit 405 forms a folding line, which can be input by the user on the operation unit 271. Done. That is, when the operation unit 271 is set to form a crease in the crease formation unit 405, the operation unit 271 is set to fold the paper P in the folding processing unit 506. Thus, when setting is made not to form the folding line in the folding line forming unit 405, the setting is made that the folding process unit 506 does not perform the folding process on the paper P.

  The setting of whether or not the folding process unit 506 performs the folding process on the paper P in the operation unit 271, in other words, the setting of whether or not the folding line forming unit 405 forms the folding line on the paper P is determined by the main body control unit. 270 is recognized.

In addition, the operation unit 271 allows the user to set a folding position when folding processing is performed on the paper P in the folding processing unit 506 and a folding line forming position when forming folding lines in the folding line forming unit 405. It has become.
The main body control unit 270 communicates with the control unit regarding the setting contents.
The control unit switches the position of the branching claw 505 according to the setting contents.

  Specifically, when the folding process is performed on the paper P, the branching claw 505 occupies the position shown in FIG. 3, and as shown in FIG. Guide to the side. As shown in FIG. 5B, the sheet P guided to the conveying roller pair 503 and 504 side is received and stacked by the rear end fence 509 at the rear end.

  When the rear end fence 509 receives and stacks a predetermined number of sheets of paper P, as shown in FIG. 5C, the displacement means is driven by the control unit, so that the rear end fence 509 moves upward by a distance corresponding to the set folding position. Accordingly, the sheet P is transported to a position where the folding process is performed, and the blade driving means is driven by the control unit so that the blade 510 is displaced so as to enter the nip of the pair of folding rollers 511. As a result, the middle portion of the paper P supported at the lower end by the rear end fence 509, specifically, the set folding position is pushed into the nip of the pair of folding rollers 511, and the folding process is performed at the set folding position. Is called.

  At this time, the pair of folding rollers 511 is rotated in a direction in which the blade 510 enters the nip when the roller driving unit is operated by the control unit, and the sheet P subjected to the folding process is rotated by the blade 510. While being pushed out, the sheet P subjected to the folding process is discharged onto the discharge tray 507 by the pair of folding rollers 511 as shown in FIG.

  On the other hand, when the paper P is not folded, the branching claw 505 occupies the position shown in FIG. 4 and guides the paper P to the conveying roller pair 502 side as shown in FIG. . The sheet P guided to the conveyance roller pair 502 side is directly discharged onto the discharge tray 508 and stacked as shown in FIG.

  The operation shown in FIG. 3 is performed on the paper P on which the crease is formed in the crease formation unit 405 as described above, but the operation is performed on the paper P on which the crease is not formed in the crease formation unit 405. The operation shown in FIG. 4 may be performed on the paper P on which no crease line is formed in the crease formation unit 405 as described above, but the crease formation unit 405 is used. In this case, the folding process is performed separately from the setting of whether or not the folding line forming unit 405 forms the folding line in the operation unit 271. In the unit 506, it is set whether or not the paper P is folded.

  The operation of the post-processing apparatus 400 will be described focusing on the operation of the skew correction unit 404. When the entrance sensor 402 detects the paper P, the control unit 450 communicates with the main body control unit 270 to check the setting status as to whether or not the skew correction unit 404 corrects the skew of the paper P, and the entrance conveyance. The rotation driving of the roller pair 403 and the conveyance roller pair 406 and 407 is started, and the rotation driving of the conveyance roller pair 408 is started.

  When the skew correction unit 404 is set not to correct the skew of the paper P, as shown in FIG. 5A, when the paper P is transported by the transport roller pair 408, the paper P Before the front end of the motor reaches the contact position with the abutting plate 409 occupying the locking position, the motor 452 is driven by the controller 450, and the phase of the cam 410 changes, as shown in FIG. As described above, the abutting plate 409 is positioned at the retracted position. With the abutting plate 409 retracted from the conveyance path of the paper P in this way, the conveyance roller pair 411 is driven to rotate at the same speed as the conveyance roller pair 408, and the paper P is directed toward the folding line forming unit 405. Are transported.

  When the skew correction unit 404 is set to correct the skew of the paper P, as shown in FIG. 6A, in the state where the paper P has been transported by the transport roller pair 408, the controller 450 The lower roller 411b is separated from the upper roller 411a by the roller displacing means 453 so that the pressure between the upper roller 411a and the lower roller 411b is released in the conveying roller pair 411, and the leading edge of the sheet P is The motor 452 positions the abutting plate 409 at the locking position by the motor 452 until the abutting plate 409 occupies the locking position, as shown in FIG. Keep it as it is.

  In this way, when the leading edge of the sheet P is abutted against the abutting plate 409, the sheet P is bent between the conveying roller pair 411 and the conveying roller pair 408, and the skew is corrected. When the correction of the skew of the paper P is completed, the controller 450 causes the roller displacing means 453 to contact the lower roller 411b with the upper roller 411a as shown in FIG. And the lower roller 411b are in a state where pressure is applied, and the phase of the cam 410 is positioned by the motor 452 at the release position as shown in FIG. To change.

  In this state, with the abutting plate 409 retracted from the transport path of the paper P, the rotation of the transport roller pair 411 is started, and the paper P is transported with the transport roller pair 411 as shown in FIG. When the roller pair 408 starts conveyance toward the crease forming unit 405 and then the rear end thereof passes through the conveyance roller pair 408, it is conveyed toward the crease forming unit 405 only by the conveyance roller pair 411, and skew correction is performed. The bending that sometimes occurred is eliminated.

  As shown in FIG. 7, the crease forming unit 405 includes the main body of the post-processing device 400 in addition to the upper base 415 and the crease forming means 414 having the upper blade 412 and the lower blade 413 shown in FIG. 1. A lower base 416 fixed to 401 and occupying a fixed position, a lower blade base 417 fixed in a manner to support the lower blade 413 from below, and both ends of the lower blade base 417 are connected to both ends of the lower base 416. And a side plate 418 for fixing the lower blade 413 in a fixed position via the lower blade receiving base 417.

  The crease forming unit 405 is also provided with a magnetic body 419 formed of a soft magnetic material fixed to the lower surface of the upper base 415 with the upper blade 412 interposed therebetween, and a position facing the magnetic body 419 from below. The electromagnet 420 as a magnetic field generation source, the back yoke 421 that supports and fixes the electromagnet 420 from below, and the control of the electromagnet 420 by controlling the energization of the electromagnet 420 by controlling the power supply to the electromagnet 420 are controlled. Magnetic force control means.

  The crease forming unit 405 also includes a side plate 422 in which both ends of the back yoke 421 are fixed at the upper edges, a back yoke base 423 in which the lower edge of the side plate 422 is fixed at both ends, and both ends of the upper surface of the lower base 416. While being fixed, the back yoke base 423 is supported from below, and the position of the electromagnet 420 in the vertical direction is adjusted by displacing the back yoke base 423 in the vertical direction, and the interval between the electromagnet 420 and the magnetic body 419 is adjusted. And vertical movement means 424 as position adjustment means.

  The crease forming unit 405 also includes a side plate 425 having upper edges fixed to both ends of the upper base 415, a cam follower 426 rotatably supported by each side plate 425, and a cam 427a that abuts the cam follower 426 from below. 427b, cams 427a and 427b fixed to both ends thereof, a cam shaft 428 that is rotatably supported by the side plate 418 and rotated at a fixed position, and a drive motor 429 as a drive source for rotationally driving the cam shaft 428 And a gear train 430 that transmits the driving force of the drive motor 429 to the cam shaft 428 to drive the cams 427a and 427b in synchronism with each other, and a motor drive control that controls the drive of the drive motor 429 realized by one function of the control unit 450 Means.

  As shown in FIG. 8, the crease forming unit 405 is also disposed on the upper surface side of the paper P, and is displaced downward together with the upper base 415 to fix the paper P when forming the crease. Between the sheet pressing member 431 that contacts the upper surface and the lower end of the sheet pressing member 431 that is fixed at a fixed position on the lower surface side of the sheet P and has been displaced downward when forming a crease, the sheet P is positioned on the upper surface. A sheet presser base 432 for fixing the sandwiched paper P and a paper presser member 431 are elastically fixed to the upper base 415, and when the paper P is sandwiched between the paper presser member 431 and the paper presser base 432. And a spring 433 as an elastic member for applying pressure.

  As shown in FIG. 7B, the upper blade 412 has a protrusion 412a along the extending direction of the upper blade 412 at the lower edge. The extending direction of the upper blade 412 coincides with the main scanning direction and the width direction of the paper P, and is orthogonal to the transport direction of the paper P. As shown in FIG. 5A, the upper blade 412 has a circular arc shape whose lower edge is convex downward. Also, the lower surface of the magnetic body 419 has a downwardly convex arc shape so as to have the same shape as the lower edge of the upper blade 412. Although not shown, the protrusion 412a similarly has a downwardly convex arc shape.

  As shown in FIG. 5B, the lower blade 413 has a groove 413a for receiving the protrusion 412a on the upper surface thereof. The upper surface of the lower blade 413 is flat, the depth of the groove 413a is constant, and the groove 413a is formed in a straight line parallel to the width direction of the paper P.

  The protrusion 412a and the groove 413a are fitted to each other when the upper blade 412 and the lower blade 413 move relative to each other in a manner in which the upper blade 412 is lowered by the driving means 434 described below. The sheet P is sandwiched in a matching manner, whereby a crease is formed in the sheet P along the width direction of the sheet P. Therefore, the back yoke base 421 has a long hole 421 a that receives the upper blade 412 in parallel to the width direction of the paper P.

  The drive unit 434 includes an upper base 415, a side plate 425, a cam follower 426, cams 427a and 427b, a cam shaft 428, a drive motor 429, a gear train 430, and a control unit 450 that functions as a motor drive control unit. And has a moving means 435 as a first driving means for relatively moving the upper blade 412 and the lower blade 413 in directions close to each other.

  The driving means 434 is also composed of a magnetic body 419, an electromagnet 420, and a control unit 450 functioning as magnetic force control means, and relatively moves the upper blade 412 and the lower blade 413 in directions close to each other. There are electromagnetic driving means 436 as two driving means.

  The moving means 435 generates a driving force for relatively moving the upper blade 412 and the lower blade 413 in directions close to each other by the own weight of the upper blade 412, the upper base 415, the side plate 425, and the cam follower 426. To get.

  As will be described later, the moving means 435 moves the upper blade 412 in an inclined manner so that the upper blade 412 contacts the lower blade 413 continuously and smoothly from one end side to the other end side. ing. Therefore, in the cam 427a and the cam 427b, the diameter corresponding to the top dead center and the diameter corresponding to the bottom dead center shown in FIG. In phase, the diameter of the cam 427a and the diameter of the cam 427b are different from each other.

  The electromagnetic driving means 436 generates a driving force for moving the upper blade 412 and the lower blade 413 in a direction close to each other by a magnetic field formed by the electromagnet 420 and acting on the magnetic body 419, thereby electromagnetically driving. To get.

  As will be described later, the electromagnetic driving means 436 is interlocked with the movement of the upper blade 412 by the moving means 435 so as to continuously and smoothly contact the lower blade 413 from one end side to the other end side thereof, The magnetic field generation region is moved from one end side of the upper blade 412 toward the other end side, and the driving force generation region is moved from one end side of the upper blade 412 toward the other end side.

  Therefore, as shown in FIG. 9, the electromagnetic driving means 436 has a plurality of electromagnets 420 along the width direction of the paper P, specifically nine, and is arranged so as to form a row on both sides of the long hole 421a. The yoke 421 is fixedly arranged on the upper surface.

  More specifically, the electromagnet 420 has electromagnets 420a, 420b, 420c, 420d, 420e, 420f, 420g, 420h, and 420i symmetrically about the long hole 421a from the left to the right in FIG. These electromagnets 420a, 420b, 420c, 420d, 420e, 420f, 420g, 420h, 420i are symmetrically arranged at the center positions of the long hole 421a and the upper blade 412 in the width direction of the paper P. That is, they are arranged symmetrically in the figure. As will be described later, the electromagnet 420 is sequentially operated by a control unit 450 functioning as a magnetic force control unit in the order of electromagnets 420a, 420b, 420c, 420d, 420e, 420f, 420g, 420h, and 420i.

  As shown in FIG. 10, the windings of the electromagnets 420a, 420b, 420c, 420d, 420e, 420f, 420g, 420h, and 420i are independent of each other, and thereby the timing is controlled by the control unit 450 that functions as a magnetic force control means. A group of coils that can be sequentially operated while being shifted is formed. The windings of the electromagnets 420a, 420b, 420c, 420d, 420e, 420f, 420g, 420h, 420i are wound around separate iron cores (not shown). Further, as is clear from the figure, the windings adjacent to each other in the width direction of the paper P of the electromagnets 420a, 420b, 420c, 420d, 420e, 420f, 420g, 420h, 420i are wound in opposite directions. Magnetic fields in opposite directions are formed.

The operation of the crease forming unit 405 having the above-described configuration will be described.
When the entrance sensor 402 detects the paper P, the control unit 450 communicates with the main body control unit 270 to determine whether or not a crease is formed on the paper P in the crease formation unit 405 and when the crease is formed. The setting state regarding the formation position of the crease is confirmed, and the rotation driving of the conveying roller pair 406 is started.

  When the crease forming unit 405 is set not to form a crease on the paper P, as shown in FIG. 8A, after the paper P is conveyed by the skew correction unit 404, As shown in FIG. 5B, even when the leading edge of the sheet P reaches the conveying roller pair 406, the control unit 450 does not operate the moving unit 435, the electromagnetic driving unit 436, and the roller displacing unit 454, and does not operate the conveying roller pair. 406 conveys the paper P as it is. The sheet P is further transported from the post-processing device 400 toward the post-processing device 500 by the transport roller pair 407.

  When the crease forming unit 405 is set to form a crease on the paper P, as shown in FIG. 8A, after the paper P is conveyed by the skew correction unit 404, the paper is pushed. With reference to the position of the contact plate 409, as shown in FIG. 5B, the crease formation position is between the upper blade 412 and the lower blade 413, specifically between the protrusion 412a and the groove 413a. At this time, the controller 450 stops the rotation drive of the conveyance roller pair 406 and stops the rotation drive of the conveyance roller pairs 408 and 411 to stop the conveyance of the paper P.

  When the conveyance of the paper P is stopped, the control unit 450 drives the moving unit 435 and displaces the upper base 415 downward as shown in FIG. 5C, so that the upper blade 412 and the paper pressing member 431 are moved. The sheet pressing member 431 presses the sheet P between the sheet pressing member 432 and the roller displacing means 454 causes the upper roller 496a to be separated from the lower roller 406b. The pressure between 406a and the lower roller 406b is released.

  In this state, the control unit 450 continues to drive the moving unit 435 and starts driving the electromagnetic driving unit 436 to insert the upper blade 412 into the lower blade 413 as shown in FIG. In this way, a crease is formed on the paper P. Details of this will be described later with reference to FIGS.

  After the crease forming process on the paper P, the controller 450 further drives the moving unit 435 to displace the upper base 415 upward as shown in FIG. The pressing member 431 is displaced upward, the upper blade 412 is separated from the paper P, and the paper pressing member 431 is separated from the paper P.

  At the timing when the pressing of the sheet P between the sheet pressing member 431 and the sheet pressing member 432 is released, the control unit 450 causes the upper roller 496a to come into contact with the lower roller 406b by the roller displacing means 454 so that the conveying roller pair In 406, pressure is applied to the upper roller 406a and the lower roller 406b.

  In this state, the control unit 450 resumes the rotational driving of the transport roller pair 406. As a result, the paper P is transported in a state in which a crease is formed at the set position, and further transported from the post-processing device 400 toward the post-processing device 500 by the transport roller pair 407.

With reference to FIG. 11 to FIG. 19, the operation when forming the folding line on the paper P as shown in FIG. 6 (d) so as to fit the upper blade 412 into the lower blade 413 will be described.
FIG. 11 shows a standby state that is the same state as shown in FIGS. 7A, 8A, and 8B. When the moving means 435 is driven in this state, the left side in FIG. In an aspect located below, the upper blade 412 is lowered in a tilted state to the state shown in FIG.

  In this state, the driving of the electromagnetic driving means 436 is started while continuing the driving of the moving means 435, and the magnetic path is set between the electromagnets 420a and 420b and the magnetic body 419 as indicated by the annular arrow in the figure. When the driving force is generated as indicated by the black arrow, the upper blade 412 inserts the left end of the paper P in the same figure into the lower blade 413 and forms a crease in this portion of the paper P. Do the creasing.

  Such driving force is generated in the upper blade 412, particularly in a portion corresponding to the electromagnets 420 a and 420 b in the extending direction, and the upper blade 412 and the lower blade 413 are moved in a manner in which this portion is brought close to the lower blade 413. This corresponds to a suction force that is relatively moved in directions close to each other.

  When this driving force is generated, the cam 427b is in contact with the cam follower 426, but the cam 427a is separated from the cam follower 426, so that the portion of the upper blade 412 where the driving force is generated moves downward. Thus, the crease is formed satisfactorily by such driving force.

  In this state, when the drive of the electromagnetic drive means 436 is switched to a mode in which the electromagnets 420b and 420c are energized as shown in FIG. 13 while the drive of the moving means 435 is continued, the upper blade 412 is brought close to the lower blade 413. The generation position of the driving force is shifted to the right side in the figure, and the crease forming position for the paper P is similarly moved to the right side.

  Further, while the driving of the moving unit 435 is continued, the driving of the electromagnetic driving unit 436 is switched to a mode in which the electromagnets 420c and 420d are energized as shown in FIG. 14, and then the electromagnet 420d, Switch to the mode of energizing 420e, then switch to the mode of energizing the electromagnets 420e and 420f as shown in FIG. 16, then switch to the mode of energizing the electromagnets 420f and 420g, as shown in FIG. As shown in FIG. 18, the mode is switched to a mode in which the electromagnets 420g and 420h are energized, and then the mode is switched to a mode in which the electromagnets 420h and 420i are energized as shown in FIG.

  As described above, the upper blade 412 is moved to the lower blade by sequentially operating the electromagnets 420a, 420b, 420c, 420d, 420e, 420f, 420g, 420h, and 420i along the extending direction of the upper blade 412 and the lower blade 413. The generation position of the driving force to be brought close to 413 is sequentially moved along the extending direction so that the inclination of the upper blade 412 with respect to the lower blade 413 is continuously changed. Relatively and continuously incline along the setting direction, and sequentially move the formation position of the crease line on the paper P along the extending direction, so that the crease line is formed on the paper P in the width direction. Are formed continuously throughout.

  When the drive of the electromagnetic drive means 436 is stopped in the state shown in FIG. 19 and the drive of the moving means 435 is continued, the state shown in FIG. 11 is restored. In this state, the driving of the moving unit 435 is stopped to enter a standby state, and the standby state is maintained until the next sheet P is in the state shown in FIG.

  The separated state of the cam 427a with respect to the cam follower 426 and the contact state of the cam 427b with the cam follower 426 change from the state shown in FIG. 15 to the state shown in FIG. 16, that is, the generation position of the driving force is in the extending direction. Reverses when the center position is exceeded. As a result, the portion of the upper blade 412 where the driving force is generated is always easy to move downward, and the crease is formed satisfactorily by the driving force. The diameters of the cams 427a and 427b are set in association with the phases so as to form the separated state and the contact state.

  In this way, the crease forming unit 405 uses only the upper blade 412 and the lower blade 413, which are a pair of members, as members that contact each surface of the paper P, and from one end in the width direction of the paper P. Since the crease is formed in a continuous motion toward the other end, for example, when a plurality of upper blades 412 are divided in the width direction of the paper P and a plurality of upper blades 412 are operated sequentially, Since only one fold line is formed smoothly without any break or overlap of fold lines, which are likely to occur, the fold line is formed efficiently and the subsequent folding process is performed well.

  Further, if the upper blade 412 is linear, a high load is generated by bringing the entire extending direction into contact with the paper P at a time, and in order to avoid this high load, the upper blade 412 When the contact pressure is reduced, a fold line formation failure is likely to occur at the center in the extending direction. However, since the upper blade 412 has an arc shape, these problems can be avoided, and the upper blade 412 and the like can be prevented. A uniform crease line is formed over the entire width direction of the paper P while suppressing the load. In order to avoid such a high load, it is conceivable to divide the upper blade 412 in the width direction of the sheet P as described above and provide a plurality of the upper blades 412. Will get.

  In performing the crease forming process described above, the crease forming unit 405 performs various adjustments according to the thickness of the paper P and the width of the paper P. Therefore, when the entrance sensor 402 detects the paper P, the control unit 450 communicates with the main body control unit 270 to acquire information regarding the thickness of the paper P and the width of the paper P.

  Then, the control unit 450 drives the vertical movement means 424 as shown in FIG. 20A in accordance with the acquired thickness of the paper P, as shown in FIGS. Thus, the position of the electromagnet 420 in the height direction, that is, the position in the thickness direction of the paper P is adjusted.

  Specifically, the case where the thickness of the paper P shown in (b-1) is small, and the case where the thickness of the paper P shown in (b-2) is large, The crease is formed with a small distance between the upper blade 412 and the lower blade 413. In the latter case, the crease is formed with a large distance between the upper blade 412 and the lower blade 413. For this reason, the distance H2 from the upper surface of the lower blade 413 to the upper surface of the electromagnet 420 in the latter case is made larger than the distance H1 from the upper surface of the lower blade 413 to the upper surface of the electromagnet 420 in the former case. Regardless, the gap between the electromagnet 420 and the magnetic body 419 is always set to h. The gap h is a value at which the above-described driving force and attractive force are generated most efficiently between the electromagnet 420 and the magnetic body 419.

  If the controller 450 causes the electromagnet 420 to form a magnetic field having the same strength, when the thickness of the paper P is large, the stiffness of the paper P is stronger and the crease is less than when the thickness of the paper P is small. Since it is difficult to form, when the thickness of the paper P is large, the driving described above is performed in accordance with the acquired thickness of the paper P in a mode in which the electromagnet 420 forms a larger magnetic field than when the thickness of the paper P is small. Regardless of the thickness of the paper P, the crease is formed well by adjusting the force and the suction force.

  In addition, the control unit 450 selects which of the magnets 420a, 420b, 420c, 420d, 420e, 420f, 420g, 420h, and 420i to operate according to the acquired width of the paper P.

  The above description that all of the electromagnets 420a, 420b, 420c, 420d, 420e, 420f, 420g, 420h, and 420i operate corresponds to the case where the width of the paper P is maximum. When the width of P is half of the maximum width and the sheet P is transported on the left side reference in FIG. 20, the electromagnets 420a, 420b, 420c, 420d, 420e are selected to operate, and these are shown in FIGS. As shown in FIG. 15, the crease is formed by sequentially operating, and the crease formation process is terminated without operating the electromagnets 420f, 420g, 420h, and 420i.

Further, for example, when the width of the paper P is half of the maximum width and the paper P is transported by the center reference in FIG. 20, the electromagnets 420c, 420d, 420e, 420f, and 420g are selected to operate. As shown in FIGS. 14 to 17, the crease is formed by sequentially operating, and the crease formation process is terminated without operating the electromagnets 420a, 420b, 420h, and 420i.
Thereby, only the electromagnet necessary for forming the fold line is driven, and the energy consumed to form the fold line is suppressed.

  As can be seen from FIG. 20, the conveyance path of the paper P in the crease forming unit 405 is between the lower surface of the back yoke 421 and the upper surface of the lower blade 413, and the above-described driving force formed by the electromagnet 420. Of the magnetic field for generating the attractive force, it is located outside the region contributing to the generation of the driving force and the attractive force. If the transport path of the paper P is between the upper surface of the electromagnet 420 and the lower surface of the magnetic body 419, the transport path generates the above-described driving force and attraction force formed by the electromagnet 420. The driving force, such as weakening the driving force and the attraction force by acting to block the magnetic field, because it is located in the region that contributes to the generation of the driving force and the attraction force , Reduce the suction efficiency formation efficiency. However, since the conveyance path of the paper P in the folding line forming unit 405 is located outside the region that contributes to the generation of the driving force and the suction force, the formation efficiency is not reduced.

  As described above, the moving means 435 is configured to drive the upper blade 412, the upper base 415, the side plate 425, the cam follower 426, and the driving force that relatively moves the upper blade 412 and the lower blade 413 toward each other. However, as shown in FIG. 21, a spring 437 as an urging member, which is a pressing means for generating such a driving force, may be provided.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments, and the present invention described in the claims is not specifically limited by the above description. Various modifications and changes are possible within the scope of the above.

  For example, in the above-described embodiment, the first member is a convex side and the second member is a concave side to form a crease, but the first member is a concave side and the second member May be convex.

  In order to form a fold line by relatively inclining the first member and the second member, at least one of these members has a circular arc shape at a portion that contacts the fold line forming member. It is desirable that both of these members have an arc shape.

In order to form a crease, the arc shape of the concave member preferably has a smaller curvature.
In the above embodiment, the moving means is provided on the second member side, but the moving means may be provided on the first member side.
The urging member may be provided on the second member side.

  In the embodiment described above, the magnetic field generation source is integrally provided on the second member side. However, the magnetic field generation source may be provided integrally on the first member side, or on the first member side and the second member side. Both may be provided with a magnetic field generation source. In this case, a repulsive magnetic field may be formed to generate the driving force described above.

The main body 250 of the image forming apparatus 100 may include post-processing devices 400 and 500.
The image forming apparatus 100 may be a printing apparatus such as a stencil printing apparatus.
The post-processing device 400 may be integrated with the post-processing device 500.
The post-processing device 400 and the post-processing device 500 may include other functions such as a stapling unit that performs stapling, a punching unit that performs punching, and an alignment unit that performs alignment including sorting.

  The post-processing devices 400 and 500 perform post-folding processing, folding processing, and the like on the paper P on which an image is not formed in the image forming apparatus 100, that is, the paper P that is discharged without performing the image forming operation in the image forming apparatus 100 Processing may be performed.

The folding line forming apparatus to which the present invention is applied intermittently conveys the folding line forming member to the same folding line forming member in order to cope with a case where folding processing is performed at two or more places. However, fold lines may be formed at a plurality of locations in the transport direction.
The crease forming apparatus to which the present invention is applied may function as a pre-processing device for a recording medium used in the image forming apparatus, and supply the recording medium on which the crease is formed to the image forming apparatus.

  The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

DESCRIPTION OF SYMBOLS 100 Image forming apparatus 400 Folding line formation apparatus, post-processing apparatus 412 1st member 413 2nd member 414 Folding line formation means 420, 420a, 420b, 420c, 420d, 420e, 420f, 420g, 420h, 420i Magnetic field generation source , Electromagnet 424 position adjusting means 434 driving means 437 urging member 600 image forming system P folding line forming member PA transport path

Japanese Patent No. 456836

Claims (12)

A first member that is in contact with one surface of the foldable line forming member; and a second member that is disposed opposite to the first member and is in contact with the other surface of the foldable line forming member. A crease forming means for forming a crease along a predetermined direction on the streak forming member;
Drive means for forming a crease in the crease forming member by the crease formation means by moving the first member and the second member in a direction close to each other;
The fold line forming apparatus having a magnetic field generating source for generating a magnetic field for generating a driving force for relatively moving the first member and the second member in directions close to each other. The crease formation device according to claim 1,
The drive means includes a plurality of the magnetic field generation sources along the predetermined direction, and sequentially operates the plurality of magnetic field generation sources along the predetermined direction, whereby the first member and the second member A crease forming device, wherein a crease is formed in a crease forming member along the predetermined direction by relatively inclining the member along the predetermined direction. The crease formation device according to claim 2,
A folding line forming apparatus, wherein a magnetic field generating source to be operated is selected from the plurality of magnetic field generating sources according to a width of a folding line forming member along the predetermined direction. The crease formation device according to any one of claims 1 to 3,
The fold line forming apparatus, wherein the magnetic field generation source is an electromagnet. In the crease formation device according to any one of claims 1 to 4,
The folding line forming apparatus, wherein the driving force is adjusted according to the thickness of the folding line forming member. In the crease formation device according to any one of claims 1 to 5,
A folding line forming apparatus, comprising: a conveyance path through which a folding line forming member is conveyed outside an area contributing to generating the driving force in the magnetic field generated by the magnetic field generation source. In the crease formation device according to any one of claims 1 to 6,
A folding line forming apparatus comprising position adjusting means for adjusting the position of the magnetic field generation source in the thickness direction of the folding line forming member. The crease formation device according to claim 7,
The fold line forming apparatus is characterized in that the position adjusting means is driven to adjust the position of the magnetic field generation source in the thickness direction of the fold line forming member according to the thickness of the fold line forming member. In the crease formation device according to any one of claims 1 to 8,
The fold line forming device, wherein the driving means includes a biasing member that generates the driving force.   The post-processing apparatus which has a crease formation apparatus as described in any one of Claim 1 thru | or 9.   An image forming apparatus comprising the crease forming device according to any one of claims 1 to 9, or the post-processing device according to claim 10.   An image forming system comprising the crease forming device according to claim 1, the post-processing device according to claim 10, or the image forming device according to claim 11.

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