JP2017193414A - Post-processing device and image formation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a post-processing device and image formation system which can achieve high conveyance efficiency while securing a region for installation of a decurler without increasing the machine length of the device.SOLUTION: A post-processing device comprises: a first path 43 where a sheet P passes; and a second path 45 which is arranged in parallel with the first path 43 and corrects curling occurring in the sheet P. The second path 45 includes: a first acceleration and deceleration path 51 which accelerates and decelerates the linear velocity of the sheet P conveyed from an upstream side device 1 to a decurler velocity Vd from the upstream side velocity V1 of the upstream side device 1; a decurler unit 52 which corrects curling occurring in the sheet P conveyed at the decurler velocity Vd from the first acceleration and deceleration path 51; and a second acceleration and deceleration path 53 which accelerates and decelerates the linear velocity of the sheet P conveyed from the decurler unit 52 to the downstream side velocity V2 of a downstream side device 9 from the decurler velocity Vd.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a post-processing apparatus and an image forming system.

  Conventionally, an image forming apparatus realized by an electrophotographic method transfers a toner image obtained from an electrostatic latent image formed on an image carrier onto a sheet. The image forming apparatus heats and pressurizes the paper on which the toner image is transferred by the fixing unit, and fixes the toner image on the paper.

  Since the fixing unit removes moisture from the paper by heating, the curling is generated on the paper on which the toner image is fixed. In order to correct the curl generated on the paper, a decurler for correcting the curl of the paper is arranged on the paper transport path (for example, see Patent Document 1).

JP 2007-320668 A

  However, in the prior art as described in Patent Document 1, the upstream or downstream path of the decurler is a bent path in order to secure an area for disposing the decurler without increasing the overall machine length of the apparatus. Yes. Therefore, when a path including such a bent path is included in the transport path in which the sheet is transported, the sheet passes through the bent path even if the sheet does not require the use of a decurler. The paper transport efficiency is poor.

  Therefore, the conventional technology can secure a region for arranging the decurler without increasing the machine length of the entire apparatus, but cannot achieve high transport efficiency.

  The present invention has been made to solve the conventional problems, and the object of the present invention is to realize a high conveyance efficiency while securing an area for placing the decurler without increasing the machine length of the entire apparatus. It is an object of the present invention to provide a post-processing apparatus and an image forming system that can be used.

  In order to achieve the above object, a post-processing apparatus according to the present invention is disposed between an upstream apparatus and a downstream apparatus, and corrects curl generated on a sheet by a path formed inside the housing. A processing apparatus, comprising: a first path through which the sheet passes; and a second path that is arranged in parallel with the first path and corrects curling that occurs in the sheet. Includes a first acceleration / deceleration path for accelerating / decelerating the linear velocity of the sheet conveyed from the upstream apparatus from the upstream speed of the upstream apparatus to a decurler speed, and the decurler from the first acceleration / deceleration path. A decurler unit that corrects curl generated in the paper conveyed at a speed, and a linear speed of the paper conveyed from the decurler unit is increased or decreased from the decurler speed to a downstream speed of the downstream device. 2 plus Comprising fast and path, and is intended.

  According to this post-processing device, the first path and the second path are arranged in parallel, and the second path includes the first acceleration / deceleration path, the decurler unit, and the second acceleration / deceleration path. By providing the path for correcting the paper and the path for bypassing the path for correcting the paper are arranged in parallel inside the housing, the area for arranging the decurler without increasing the overall machine length of the apparatus It is possible to achieve high transport efficiency while ensuring the above.

  In the post-processing apparatus according to the present invention, the decurler unit is disposed on the downstream side of the first acceleration / deceleration path, and the first curl in the first direction is corrected among the curls generated in the paper. And a second decurler that is disposed downstream of the first decurler and corrects a curl in a second direction that is opposite to the first direction among the curls that occur in the paper. It is preferable to comprise.

  According to this post-processing apparatus, the first decurler for correcting the curl in the first direction and the second decurler for correcting the curl in the second direction that is opposite to the first direction are provided. As a result, the curl generated on the paper can be corrected along the two side surfaces, so that the curl generated on the paper can be improved from both sides.

  In the post-processing apparatus according to the present invention, the decurler unit is provided on an inner side surface of the housing, and connects between the first acceleration / deceleration path and the second acceleration / deceleration path. It is preferable to further include a connection path formed in a U-shape, and to synchronize the driving of the first decurler, the connection path, and the second decurler.

  According to this post-processing apparatus, the connection path is provided inside the housing, has a U-shape that connects the first acceleration / deceleration path and the second acceleration / deceleration path, and has the first shape. By synchronizing the drive of the decurler, connecting path, and second decurler, it is possible to realize a constant speed decurler while effectively utilizing the internal space of the housing, thereby increasing the overall machine length of the apparatus. Therefore, it is possible to maintain a constant tension when correcting the paper.

  In the post-processing apparatus according to the present invention, the first path includes a horizontal path that connects the upstream apparatus and the downstream apparatus, and the sheet passes through the horizontal path. In the meantime, it is preferable to accelerate and decelerate the upstream speed to the downstream speed.

  According to this post-processing device, while the sheet passes through the horizontal path, the upstream speed is increased or decreased to the downstream speed, so that the linear speed of the upstream apparatus is increased until the sheet is conveyed to the downstream apparatus. Therefore, it is possible to increase / decrease the conveyance efficiency for conveying the sheet to the downstream apparatus.

  The post-processing apparatus according to the present invention further includes a discharge unit that is disposed above the first path and that discharges the paper, and the decurler unit is disposed below the first path. It is preferable.

  According to this post-processing apparatus, the discharge unit is disposed above the first path, and the decurler unit is disposed below the first path, so that the space in the vertical direction of the housing is effectively utilized. The first path that bypasses the second path can be realized inside the housing, and the paper can be discharged, so that the paper can be discharged without increasing the overall machine length. The paper function and the function of bypassing the path for correcting the curl of the paper can be realized.

  The post-processing apparatus according to the present invention further includes a discharge unit that is disposed below the first path and that discharges the paper, and the decurler unit is disposed above the first path. It is preferable.

  According to this post-processing device, the discharge tray is disposed below the first path, and the decurler unit is disposed above the first path, so that the space in the vertical direction of the housing is effectively utilized. The first path that bypasses the second path can be realized inside the housing, and the paper can be discharged, so that the paper can be discharged without increasing the overall machine length. The paper function and the function of bypassing the path for correcting the curl of the paper can be realized.

  Further, in the post-processing apparatus according to the present invention, the decurler unit is disposed on either the left side or the right side of the first path along the transport direction of the first path. It is preferable.

  According to this post-processing apparatus, the discharge tray is disposed above the first path, and the decurler unit is disposed on either the left side or the right side of the first path. The space in the direction can be used effectively, the first path that bypasses the second path can be realized inside the housing, and the paper length can be discharged. Without increasing, it is possible to realize a paper discharge function and a function of bypassing a path for correcting paper curl.

  In the post-processing apparatus according to the present invention, the first decurler is connected between the downstream side of the first acceleration / deceleration path and the upstream side of the connection path, and the second decurler is It is preferably connected between the downstream side of the connection path and the upstream side of the second acceleration / deceleration path, and is disposed at a position facing the first decurler.

  According to this post-processing apparatus, the second decurler is disposed at a position facing the first decurler, so that the internal space of the housing is effectively used and the overall machine length is not increased. The apparatus can be deferred without excessively increasing the installation area.

  In the post-processing apparatus according to the present invention, the first decurler is connected between a downstream side of the first acceleration / deceleration path and an upstream side of the second decurler, and the second decurler Is preferably connected between the downstream side of the first decurler and the upstream side of the connection path, and is disposed at a position connected to the first decurler.

  According to this post-processing apparatus, the second decurler is disposed at a position connected to the first decurler so as not to increase the machine length of the entire apparatus, and thus does not increase the installation area of the apparatus. You can defer the device.

  In order to achieve the above object, an image forming system according to the present invention includes the post-processing device described above, the upstream device described above, and the downstream device described above.

  According to this image forming system, as in the case of the post-processing apparatus, it is possible to achieve high conveyance efficiency while securing a region for placing the decurler without increasing the machine length of the entire apparatus.

  Further, according to this image forming system, paper curling is eliminated by the post-processing device, and the paper with flatness secured is conveyed to the downstream device, so that a high-quality booklet can be produced after post-processing. it can.

  According to the present invention, it is possible to achieve high transport efficiency while securing a region for placing a decurler without increasing the overall machine length of the apparatus.

1 is a diagram illustrating an example of the overall configuration of an image forming system in Embodiment 1 of the present invention. It is a figure which shows an example of schematic structure of the post-processing apparatus 3 in Embodiment 1 of this invention. It is a figure which shows an example of the arrangement configuration of the various sensors in Embodiment 1 of this invention. It is a figure which shows an example of the linear velocity in Embodiment 1 of this invention. It is a figure which shows an example of schematic structure of post-processing apparatus 3 'in Embodiment 2 of this invention. It is a figure which shows an example of schematic structure of the post-processing apparatus 3 in Embodiment 3 of this invention. It is a figure which shows an example of schematic structure of the post-processing apparatus 3 in Embodiment 4 of this invention. It is a figure which shows an example of schematic structure of the post-processing apparatus 3 in Embodiment 5 of this invention. It is a figure which shows an example of schematic structure of the post-processing apparatus 3 in Embodiment 6 of this invention. It is a figure which shows an example of schematic structure of the post-processing apparatus 3 in Embodiment 7 of this invention. It is a figure which shows an example of schematic structure of post-processing apparatus 3 'in Embodiment 8 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.

Embodiment 1. FIG.
FIG. 1 is a diagram showing an example of the overall configuration of an image forming system in Embodiment 1 of the present invention. As shown in FIG. 1, the image forming system includes an upstream device 1, a post-processing device 3, and a downstream device 9.

  The upstream apparatus 1 includes an automatic document feeder 11, an image reading unit 12, an image forming unit 13, a conveying unit 14, and a paper feeding unit 15. The automatic document feeder 11 is provided on the image reading unit 12 and automatically feeds one or a plurality of documents T in the automatic feeding mode. In the automatic paper feed mode, a process of feeding a document T placed on the automatic document feeder 11 and reading an image printed on the document T is executed.

  The image reading unit 12 reads a color image formed on the document T, that is, a color image printed on the document T. The image reading unit 12 includes a one-dimensional image sensor and the like. The image sensor photoelectrically converts incident light. The analog image reading signal photoelectrically converted by the image sensor is converted into digital image data by the image forming unit 13. The image forming unit 13 forms an image on the paper P based on the converted digital image data.

  Specifically, the image forming unit 13 charges, exposes, and develops the photoconductor 23 by an electrophotographic process. The image forming unit 13 includes a printer engine 21 and a fixing unit 25. The printer engine 21 forms a toner image on the photoconductor 23. The printer engine 21 transfers the toner image on the photoconductor 23 onto the paper P conveyed from the paper supply unit 15 via the conveyance unit 14.

  The fixing unit 25 fixes the toner image transferred to the paper P and prints the image on the paper P. Specifically, the fixing unit 25 includes a heat source 25a, a heating roller 25b, and a pressure roller 25c. The heating roller 25b includes a heat source 25a. A nip for conveying the paper P is formed by the heating roller 25b and the pressure roller 25c. The paper P is heated and pressurized by passing through the nip. Therefore, the toner that forms the toner image transferred onto the paper P is melted. Therefore, the toner image is fixed on the paper P by melting the toner.

  The paper feed unit 15 includes a storage unit 15a, a first paper feed unit 15b, and a second paper feed unit 15c. The accommodating portion 15 a accommodates the paper P. The first paper feed unit 15b conveys the paper P from the storage unit 15a to the second paper feed unit 15c. The second paper feed unit 15 c temporarily stops the paper P and then transports the paper P to the printer engine 21.

  The transport unit 14 includes a first transport unit 14a and a second transport unit 14b. The first transport unit 14 a is a path to the storage unit 15 a, the printer engine 21, and the fixing unit 25. The second transport unit 14b is a path for transporting the paper P in reverse. A paper discharge roller 16 is provided on the downstream side of the fixing unit 25. The paper discharge roller 16 discharges the paper P on which an image is printed out of the apparatus.

  The upstream device 1 includes a control unit 101. Specifically, the control unit 101 mainly includes a CPU, a ROM, a RAM, and an I / O interface (not shown). The control unit 101 controls the operation of each unit of the upstream device 1 by the CPU reading various programs corresponding to the processing contents from the ROM or a memory (not shown), expanding the program into the RAM, and cooperating with the expanded programs. To do.

  That is, the control unit 101 controls the operation of the upstream device 1 and can be realized by a microcomputer mainly composed of a CPU, a ROM, a RAM, and an I / O interface (not shown). Various functions are realized by the control unit 101 executing a predetermined control program. For example, the control unit 101 executes various functions according to the operation content of the operation unit 17.

  The downstream device 9 performs various processes on the paper P discharged from the upstream device 1. The various processes correspond to, for example, punching, folding, flat binding, center folding, glue binding, cutting, and the like. The downstream side device 9 is a general term for a punching machine, a folding machine, a flat stitching machine, a center folding saddle stitching machine, a gluing bookbinding machine, or a cutting machine.

  The post-processing device 3 is disposed between the upstream device 1 and the downstream device 9, and corrects curl generated on the paper P by a path formed inside the housing 31. FIG. 2 is a diagram illustrating an example of a schematic configuration of the post-processing device 3 according to the first embodiment of the present invention. As shown in FIG. 2, the post-processing device 3 includes a first path 43 and a second path 45.

  The first path 43 is a path through which the paper P passes. Specifically, the first path 43 is formed with a horizontal path 43 a that connects the upstream apparatus 1 and the downstream apparatus 9. In the first path 43, a plurality of bypass rollers 43b are arranged on the horizontal path 43a. The first path 43 accelerates or decelerates the upstream speed V1 of the upstream apparatus 1 to the downstream speed V2 of the downstream apparatus 9 while the paper P passes through the horizontal path 43a by driving the bypass roller 43b. . In the following description, the illustration and description of the bypass roller 43b are omitted.

  The second path 45 is arranged in parallel with the first path 43 and corrects the curl generated on the paper P. Specifically, the second path 45 includes a first acceleration / deceleration path 51, a decurler unit 52, and a second acceleration / deceleration path 53.

  The first acceleration / deceleration path 51 includes a plurality of first rollers 71, and the linear velocity of the paper P is controlled by the first rollers 71. Specifically, the first acceleration / deceleration path 51 accelerates or decelerates the linear speed of the paper P conveyed from the upstream apparatus 1 from the upstream speed V1 of the upstream apparatus 1 to the decurler speed Vd.

  The decurler unit 52 corrects the curl generated on the paper P conveyed from the first acceleration / deceleration path 51 at the decurler speed Vd. Specifically, the decurler unit 52 includes a first decurler 62 and a second decurler 64.

  The first decurler 62 is disposed on the downstream side of the first acceleration / deceleration path 51. The first decurler 62 corrects curl in the first direction among curls generated on the paper P. Specifically, the first decurler 62 includes a first upstream roller 81, a first correction roller unit 83, and a first downstream roller 82. The first correction roller unit 83 includes a support roller 83a, a drive roller 83b, a driven roller 83c, a pressing roller 83d, and a belt 83e.

  More specifically, the belt 83e is formed in an endless shape. The belt 83e is supported by three points of a support roller 83a, a drive roller 83b, and a driven roller 83c, and conveys the paper P by driving the drive roller 83b. The pressing roller 83d is disposed at a position where the pressing roller 83d bites into the belt 83e that passes between the driving roller 83b and the driven roller 83c. The tension of the belt 83e is controlled according to the position where the pressing roller 83d is disposed.

  A curved portion 91 is formed on the starting point side of the first acceleration / deceleration path 51. The curved portion 91 is formed on the start point side of the first acceleration / deceleration path 51 from a part of the horizontal path 43a. The first direction in which the first decurler 62 corrects the curl generated on the paper P is opposite to the bending portion 91. That is, the first decurler 62 can correct curl formed when the paper P passes through the curved portion 91.

  The second decurler 64 is disposed on the downstream side of the first decurler 62. The second decurler 64 corrects a curl in a second direction that is opposite to the first direction among the curls that occur in the paper P. Specifically, the second decurler 64 includes a second upstream roller 84, a second correction roller portion 86, and a second downstream roller 85. The second correction roller unit 86 includes a support roller 86a, a driving roller 86b, a driven roller 86c, a pressing roller 86d, and a belt 86e.

  The second correction roller unit 86 has the same configuration as that of the first correction roller unit 83 except that the direction in which the curl generated on the paper P is corrected is the second direction, and thus the description thereof is omitted.

  In the example of FIG. 2, the decurler unit 52 includes a connection path 63 between the first decurler 62 and the second decurler 64. The connection path 63 is provided on the inner side surface of the housing 31, and connects the first acceleration / deceleration path 51 and the second acceleration / deceleration path 53, and is formed in a U shape. In the example of FIG. 2, the connection path 63 is provided at the bottom of the apparatus.

  The connection path 63 includes a plurality of second rollers 72. Each of the second rollers 72 relays the paper P conveyed from the first decurler 62 to the second decurler 64.

  The connecting path 63 is formed with curved portions 92 and 93. The curved portion 92 is formed from the end point side of the first decurler 62 to the start point side of the connection path 63. The bending portion 93 is formed on the start point side of the second decurler 64 from the end point side of the connection path 63. The second direction in which the second decurler 64 corrects the curl generated on the paper P is opposite to the curved portions 92 and 93. That is, the second decurler 64 can correct the curl formed when the paper P passes through the curved portions 92 and 93.

  In addition, it is preferable that each curve of the curved parts 92 and 93 is R50 mm or more.

  The second acceleration / deceleration path 53 includes a plurality of third rollers 73, and controls the linear velocity of the paper P by driving control of the third rollers 73. Specifically, the second acceleration / deceleration path 53 accelerates / decelerates the linear velocity of the paper P conveyed from the decurler unit 52 from the decurler velocity Vd to the downstream velocity V2 of the downstream device 9.

  In the example of FIG. 2, the first decurler 62 connects the downstream side of the first acceleration / deceleration path 51 and the upstream side of the connection path 63. The second decurler 64 connects the downstream side of the connection path 63 and the upstream side of the second acceleration / deceleration path 53 and is disposed at a position facing the first decurler 62.

  Next, the path lengths of the horizontal path 43a, the first acceleration / deceleration path 51, and the second acceleration / deceleration path 53 will be described. FIG. 3 is a diagram illustrating an example of an arrangement configuration of various sensors according to the first embodiment of the present invention. FIG. 4 is a diagram illustrating an example of the linear velocity according to the first embodiment of the present invention.

  As shown in FIG. 3, a first paper passing sensor 105 is provided on the starting point side of the first acceleration / deceleration path 51. A second paper passing sensor 106 is provided on the end point side of the first acceleration / deceleration path 51. A third sheet passing sensor 107 is provided on the starting point side of the second acceleration / deceleration path 53. A fourth paper passing sensor 108 is provided on the end point side of the second acceleration / deceleration path 53.

  Each of the first sheet passing sensor 105, the second sheet passing sensor 106, the third sheet passing sensor 107, and the fourth sheet passing sensor 108 includes, for example, a transmissive photoelectric sensor including a light receiving element and a light emitting element. It can be realized by a sensor. From the detection position of the first paper passage sensor 105 to the detection position of the second paper passage sensor 106 corresponds to the path length of the first acceleration / deceleration path 51. Similarly, the length from the detection position of the third paper passage sensor 107 to the detection position of the fourth paper passage sensor 108 corresponds to the path length of the second acceleration / deceleration path 53.

  The upstream speed V1 in FIG. 3 is an acceptance speed, and is a constant speed as shown in FIG. 4, for example, 1600 mm / s. The decurler speed Vd in FIG. 3 maintains a constant speed as shown in FIG. 4 and is, for example, 800 mm / s. The first acceleration / deceleration path 51 starts acceleration / deceleration as shown in FIG. 4 when the rear end of the sheet P passes through the first sheet passing sensor 105.

  On the other hand, the downstream speed V2 in FIG. 3 is a paper discharge speed, and is a constant speed as shown in FIG. The second acceleration / deceleration path 53 starts acceleration / deceleration as shown in FIG. 4 when the rear end of the sheet P passes through the decurler unit 52. In this way, the decurler unit 52 maintains the decurler speed Vd at a constant speed.

  The required path length L1 of the first acceleration / deceleration path 51 is expressed by the following equation (1).

  In equation (1), the required path length L1 is represented by the maximum sheet length Lp that can be handled by the post-processing device 3 and the maximum transport distance La1 of the first acceleration / deceleration path 51.

  A formula including details of the maximum transport distance La1 of the first acceleration / deceleration path 51 is expressed as the following formula (2).

  That is, the maximum transport distance La1 of the first acceleration / deceleration path 51 is represented by the sum of the area A1 and the area B1 that are shaded in FIG.

  The required path length L2 of the second acceleration / deceleration path 53 is expressed by the following equation (3).

  In Expression (3), the required path length L2 is represented by the maximum sheet length Lp that can be handled by the post-processing device 3 and the maximum transport distance La2 of the second acceleration / deceleration path 53.

  A formula including details of the maximum transport distance La2 of the second acceleration / deceleration path 53 is expressed as the following formula (4).

  That is, the maximum transport distance La2 of the second acceleration / deceleration path 53 is represented by the sum of the area A2 and the area B2 that are shaded in FIG.

  Note that the required path length L3 can be similarly obtained for the horizontal path 43a. That is, the required path length L3 of the horizontal path 43a is represented by the maximum sheet length Lp that can be handled by the post-processing device 3 and the maximum transport distance La3 of the horizontal path 43a. That is, the maximum transport distance La3 of the horizontal path 43a can be obtained from the distance required for acceleration / deceleration from the upstream speed V1 to the downstream speed V2 in the same manner as described above, and is expressed by the following equations (5) and (6). It is expressed as follows.

  The post-processing device 3 includes a control unit 103. Specifically, the control unit 103 mainly includes a CPU, a ROM, a RAM, and an I / O interface (not shown). The control unit 103 controls the operation of each unit of the post-processing device 3 by the CPU reading various programs corresponding to the processing contents from the ROM or a memory (not shown), expanding the program to the RAM, and cooperating with the expanded programs. To do.

  That is, the control unit 103 controls the operation of the post-processing device 3 and can be realized by a microcomputer mainly composed of a CPU, a ROM, a RAM, and an I / O interface (not shown). Various functions are realized by the control unit 103 executing a predetermined control program.

  According to the above description, the post-processing device 3 includes the first path 43 and the second path 45, and the first path 43 and the second path 45 are arranged in parallel. The second path 45 is a path for correcting the curl generated on the paper P. The second path 45 includes a first acceleration / deceleration path 51, a decurler unit 52, and a second acceleration / deceleration path 53.

  Therefore, the second path 45 that is a path for correcting the paper P and the first path 43 that is a path that bypasses the path for correcting the curl generated in the paper P are arranged in parallel inside the housing 31. ing. Therefore, an area for arranging the decurler is secured inside the casing 31. Further, the first path 43 and the second path 45 do not increase the overall machine length of the apparatus. When it is not necessary to correct the curl that occurs on the paper P, the paper P only needs to pass through the first path 43, so there is no possibility that the conveyance efficiency deteriorates.

  In other words, the post-processing device 3 can achieve high transport efficiency while securing an area for placing the decurler without increasing the overall machine length of the device.

  The decurler unit 52 includes a first decurler 62 and a second decurler 64. The first decurler 62 corrects curl in the first direction among curls generated on the paper P. The second decurler 64 corrects a curl in a second direction that is opposite to the first direction among the curls that occur in the paper P.

  Therefore, at least the curl in the first direction and the curl in the second direction opposite to the first direction can be corrected. Therefore, the curl generated on the paper P is corrected along the two side surfaces. be able to. Therefore, the post-processing device 3 can improve the curl generated on the paper P from both sides of the paper P.

  Further, the decurler unit 52 includes a connection path 63. The connection path 63 is formed in a U shape. The decurler unit 52 includes a first upstream roller 81, a driven roller 83c, a pressing roller 83d, a driving roller 83b, a support roller 83a, a first downstream roller 82, a plurality of second rollers 72, and a second upstream. By linking the side roller 84, the driven roller 86c, the pressing roller 86d, the driving roller 86b, the support roller 86a, and the second downstream roller 85, the decurler speed Vd is maintained at a constant speed.

  That is, the decurler unit 52 keeps the decurler speed Vd at a constant speed by synchronizing the driving of the first decurler 62, the connecting path 63, and the second decurler 64. Therefore, a low-speed decurler can be realized while the internal space of the housing 31 can be effectively utilized. Therefore, it is possible to keep the tension when correcting the paper P constant without increasing the machine length of the entire apparatus.

  Further, the first path 43 accelerates or decelerates the upstream speed V1 to the downstream speed V2 while the paper P passes through the horizontal path 43a. Therefore, it is possible to accelerate and decelerate from the linear speed of the upstream apparatus 1 to the linear speed of the downstream apparatus 9 before the paper P is conveyed to the downstream apparatus 9. Therefore, since the post-processing device 3 can discharge the paper P to the downstream device 9 at the downstream speed V2, the conveyance efficiency for conveying the paper P to the downstream device 9 can be improved.

  Further, the second decurler 64 is disposed at a position facing the first decurler 62. Therefore, the internal space of the housing 31 is effectively used, and the machine length of the entire apparatus does not increase. Therefore, the apparatus can be deferred without excessively increasing the installation area of the entire apparatus, and an increase in the size of the entire apparatus can be avoided.

Embodiment 2. FIG.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the second embodiment, an example in which the position where the second path 45 ′ is arranged is different from that in the first embodiment will be described.

  FIG. 5 is a diagram illustrating an example of a schematic configuration of the post-processing device 3 ′ according to the second embodiment of the present invention. As shown in FIG. 5, the second path 45 ′ is disposed above the first path 43 in the housing 31 ′. Therefore, the decurler unit 52 ′ is also disposed above the first path 43. Specifically, the decurler unit 52 ′ is disposed on the upper portion of the casing 31 ′.

  According to the above description, the space in the vertical direction of the casing 31 ′ can be effectively used, and the first path 43 that bypasses the second path 45 ′ can be realized inside the casing 31 ′. it can. Therefore, it is possible to realize a function of bypassing the path for correcting the curl of the paper P without increasing the machine length of the entire apparatus.

Embodiment 3. FIG.
In the third embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted. In the third embodiment, an example in which a second path 45 and a second path 45 ′ are provided will be described.

  FIG. 6 is a diagram illustrating an example of a schematic configuration of the post-processing device 3 according to the third embodiment of the present invention. As shown in FIG. 6, a second path 45 and a second path 45 ′ are arranged in parallel with the first path 43. Therefore, the decurler unit 52 and the decurler unit 52 ′ are provided in the internal space of the housing 32. Therefore, two paths for correcting the curl of the paper P and one path for bypassing the path for correcting the curl of the paper P exist inside the housing 32.

  With such an arrangement, the curl of at least two sheets of paper P can be corrected at the same time, and when the correction of curl of the sheet P is unnecessary, the path can be shortened. The operating rate of the processing apparatus 3 can be increased.

Embodiment 4 FIG.
In the fourth embodiment, the same components as those in the first to third embodiments are denoted by the same reference numerals, and the description thereof is omitted. In the fourth embodiment, the positions where the first decurler 62 and the second decurler 64 are arranged are different from those in the first to third embodiments.

  FIG. 7 is a diagram illustrating an example of a schematic configuration of the post-processing device 3 according to the fourth embodiment of the present invention. As shown in FIG. 7, the first decurler 62 is connected between the downstream side of the first acceleration / deceleration path 51 and the upstream side of the second decurler 64. On the other hand, the second decurler 64 is connected between the downstream side of the first decurler 62 and the upstream side of the connection path 63, and is disposed at a position connected to the first decurler 62.

  According to the above description, the machine length of the entire apparatus is not increased. Therefore, since the apparatus can be deferred without excessively increasing the installation area of the entire apparatus, an increase in the size of the entire apparatus can be avoided. In the present embodiment, it is preferable to secure a sufficient path length for the first acceleration / deceleration path 51 and the second acceleration / deceleration path 53.

Embodiment 5. FIG.
In the fifth embodiment, the same components as those in the first to fourth embodiments are denoted by the same reference numerals, and the description thereof is omitted. In the fifth embodiment, the configuration of the casing 31 of the post-processing device 3 is different from those in the first to fourth embodiments.

  FIG. 8 is a diagram illustrating an example of a schematic configuration of the post-processing device 3 according to the fifth embodiment of the present invention. As shown in FIG. 8, the decurler unit 52 is disposed on the left side of the first path 43 along the transport direction X of the first path 43.

  With such an arrangement, the space in the left direction of the housing 31 can be effectively used, and the first path 43 that bypasses the second path 45 can be realized inside the housing 31. . Therefore, the post-processing device 3 can realize a function of bypassing the path for correcting the curl of the paper P without increasing the machine length of the entire device.

Embodiment 6. FIG.
In the sixth embodiment, the same components as those in the first to fifth embodiments are denoted by the same reference numerals, and description thereof is omitted. In the sixth embodiment, the configuration of the casing 31 of the post-processing device 3 is different from those in the first to fifth embodiments.

  FIG. 9 is a diagram illustrating an example of a schematic configuration of the post-processing device 3 according to the sixth embodiment of the present invention. As shown in FIG. 9, the decurler unit 52 is disposed on the right side of the first path 43 along the transport direction X of the first path 43.

  With such an arrangement, the right space of the housing 31 can be used effectively, and the first path 43 that bypasses the second path 45 can be realized inside the housing 31. . Therefore, the post-processing device 3 can realize a function of bypassing the path for correcting the curl of the paper P without increasing the machine length of the entire device.

Embodiment 7. FIG.
In the seventh embodiment, the same components as those in the first to sixth embodiments are denoted by the same reference numerals, and the description thereof is omitted. In the seventh embodiment, an example in which the discharge unit 110 is provided on the housing 31 will be described.

  FIG. 10 is a diagram illustrating an example of a schematic configuration of the post-processing device 3 according to the seventh embodiment of the present invention. As shown in FIG. 10, the discharge unit 110 is disposed above the first path 43. The discharge unit 110 is a unit for discharging the paper P.

  The discharge unit 110 includes a discharge path 115 inside the housing 111. The discharge unit 110 includes a discharge tray 142 and a discharge auxiliary tray 141 outside the casing 111. The paper discharge path 115 includes discharge rollers 131 and 132. The paper discharge path 115 includes a switching unit 122. The switching unit 122 switches the discharge destination of the paper P conveyed by the plurality of discharge rollers 131 to one of the discharge auxiliary tray 141 and the discharge tray 142.

  Note that the casing 31 is provided with a switching unit 121. The switching unit 121 is provided on the end point side of the first path 43 and the end point side of the second path 45, and sets the transport destination of the paper P transported by the first path 43 or the second path 45 to the downstream side. Switch to either one of the device 9 or the discharge unit 110.

  According to the above description, in the post-processing device 3, the discharge unit 110 is disposed above the first path 43. As shown in FIG. 10, in the post-processing device 3, the decurler unit 52 is disposed below the first path 43. Therefore, the space in the vertical direction of the housing 31 can be effectively used. Further, the post-processing device 3 can realize the first path 43 that bypasses the second path 45 inside the housing 31. Furthermore, since the discharge unit 110 is disposed above the housing 31, the post-processing device 3 can discharge the paper P. Therefore, the post-processing device 3 can realize the function of bypassing the path for correcting the curl of the paper P and the function of discharging the paper P without increasing the overall machine length of the device.

Embodiment 8. FIG.
In the eighth embodiment, the same components as those in the first to seventh embodiments are denoted by the same reference numerals, and the description thereof is omitted. In the eighth embodiment, an example in which the discharge unit 110 ′ is provided below the housing 31 ′ will be described.

  FIG. 11 is a diagram illustrating an example of a schematic configuration of the post-processing device 3 ′ according to the eighth embodiment of the present invention. As shown in FIG. 11, the discharge unit 110 ′ is disposed below the first path 43. The discharge unit 110 ′ is a unit that discharges the paper P.

  The discharge unit 110 'includes a discharge path 115' inside the housing 111 '. The discharge unit 110 'includes a discharge tray 142' outside the housing 111 '. The paper discharge path 115 ′ includes discharge rollers 131 ′ and 132 ′.

  The casing 31 'is provided with a switching unit 121'. The switching unit 121 ′ is provided on the end point side of the first path 43 and the end point side of the second path 45 ′, and determines the transport destination of the paper P transported by the first path 43 or the second path 45 ′. Then, switch to either the downstream device 9 or the discharge unit 110 ′.

  According to the above description, in the post-processing device 3 ′, the discharge unit 110 ′ is arranged below the first path 43. Further, as shown in FIG. 11, in the post-processing device 3 ′, the decurler unit 52 ′ is disposed above the first path 43. Therefore, the vertical space of the casing 31 ′ can be effectively used. Further, the post-processing device 3 ′ can realize the first path 43 that bypasses the second path 45 ′ inside the housing 31 ′. Further, the post-processing device 3 ′ can discharge the paper P because the discharge unit 110 ′ is disposed below the housing 31 ′. Therefore, the post-processing device 3 ′ can realize the function of bypassing the path for correcting the curl of the paper P and the function of discharging the paper P without increasing the overall machine length.

  As described above, the post-processing devices 3 and 3 ′ according to the present invention have been described based on the embodiment. However, the present invention is not limited thereto, and modifications may be made without departing from the spirit of the present invention. Good.

  For example, in the present embodiment, an example in which the first acceleration / deceleration path 51 decelerates at a constant speed when decelerating from the upstream speed V1 to the decurler speed Vd has been described. It is not a thing. For example, you may decelerate in steps. In short, it is sufficient that the decurler unit 52 can realize a constant speed decurler.

  In the fifth embodiment, an example in which the decurler unit 52 is disposed on the left side of the first path 43 has been described. In the sixth embodiment, an example in which the decurler unit 52 is disposed on the right side of the first path 43 has been described.

  In short, the decurler unit 52 may be arranged on either the left side or the right side of the first path 43 along the transport direction X of the first path 43.

  With such an arrangement, the space in the left-right direction of the housing 31 can be used effectively, and the first path 43 that bypasses the second path 45 can be realized inside the housing 31. The function of bypassing the path for correcting the curl of the paper P can be realized without increasing the machine length of the entire apparatus.

  In other words, since the curling of the paper P is eliminated by the post-processing device 3, the paper P having a flatness is conveyed to the downstream device 9 disposed on the downstream side of the post-processing device 3. The The downstream apparatus 9 is an apparatus that can create a booklet from the paper P by performing a binding process or the like. Therefore, the image forming system can produce a high-quality booklet after the post-processing by the post-processing device 3.

DESCRIPTION OF SYMBOLS 1 Upstream apparatus 3, 3 'Post-processing apparatus 9 Downstream apparatus 11 Automatic document feeder 12 Image reading part 13 Image forming part 14 Conveying part 14a 1st conveying part 14b 2nd conveying part 15 Paper feeding part 15a Accommodating part 15b 1st 1 paper feeding unit 15c second paper feeding unit 16 paper discharge roller 17 operation unit 21 printer engine 23 photoconductor 25 fixing unit 25a heat source 25b heating roller 25c pressure roller 31, 31 ', 32 housing 43 first path 43a horizontal Path 43b Detour roller 45, 45 'Second path 51 First acceleration / deceleration path 52, 52', 52 '' Decurler unit 53 Second acceleration / deceleration path 62 First decurler 63 Connection path 64 Second decurler 71 1st roller 72 2nd roller 73 3rd roller 81 1st upstream roller 82 1st downstream roller 8 1st correction roller part 83a Support roller 83b Drive roller 83c Driven roller 83d Press roller 83e Belt 84 2nd upstream roller 85 2nd downstream roller 86 2nd correction roller part 86a Support roller 86b Drive roller 86c Driven roller 86d Pressing roller 86e Belt 91-93 Bending part 101, 103 Control part 105 1st paper passing sensor 106 2nd paper passing sensor 107 3rd paper passing sensor 108 4th paper passing sensor 110, 110 'discharge unit 111 , 111 ′ casing 115, 115 ′ discharge path 121, 122, 121 ′ switching unit 131, 132, 131 ′, 132 ′ discharge roller 141 discharge auxiliary tray 142, 142 ′ discharge tray P paper T document X transport direction V1 upstream speed Vd Deca Over speed V2 downstream speed

Claims (10)

A post-processing device that is disposed between an upstream device and a downstream device and corrects curl generated on a sheet by a path formed inside the housing,
A first path through which the paper passes;
A second path that is arranged in parallel with the first path and corrects curl generated in the paper;
With
The second route is:
A first acceleration / deceleration path for accelerating or decelerating the linear velocity of the paper conveyed from the upstream device from the upstream speed of the upstream device to the decurler speed;
A decurler unit that corrects curl generated in the paper conveyed at the decurler speed from the first acceleration / deceleration path;
A second acceleration / deceleration path for accelerating or decelerating the linear velocity of the sheet conveyed from the decurler unit from the decurler speed to the downstream speed of the downstream device;
Comprising
Post-processing device. The decurler unit is
A first decurler which is disposed downstream of the first acceleration / deceleration path and corrects curl in a first direction among curls generated on the paper;
A second decurler that is arranged downstream of the first decurler and corrects a curl in a second direction that is opposite to the first direction among the curls generated in the paper;
Comprising
The post-processing apparatus according to claim 1. The decurler unit is
Provided on the inner side surface of the housing, further connecting a connection path formed between the first acceleration / deceleration path and the second acceleration / deceleration path and formed in a U shape;
Synchronizing the drive of the first decurler, the connection path, and the second decurler;
The post-processing apparatus according to claim 2. The first route is:
A horizontal path connecting the upstream device and the downstream device is formed;
While the sheet passes through the horizontal path, the upstream speed is accelerated or decelerated to the downstream speed.
The post-processing apparatus according to claim 3. A discharge unit that is disposed above the first path and that discharges the paper;
The decurler unit is
Disposed below the first path,
The post-processing apparatus according to claim 4. A discharge unit disposed below the first path and configured to discharge the paper;
The decurler unit is
Disposed above the first path,
The post-processing apparatus according to claim 4. The decurler unit is
Along the conveyance direction of the first path, arranged on either the left side or the right side of the first path,
The post-processing apparatus according to claim 4. The first decurler is
Connected between the downstream side of the first acceleration / deceleration path and the upstream side of the connection path;
The second decurler is
It is connected between the downstream side of the connection path and the upstream side of the second acceleration / deceleration path, and is disposed at a position facing the first decurler.
The post-processing apparatus according to any one of claims 3 to 7. The first decurler is
Connected between the downstream side of the first acceleration / deceleration path and the upstream side of the second decurler;
The second decurler is
It is connected between the downstream side of the first decurler and the upstream side of the connection path, and is disposed at a position connected to the first decurler.
The post-processing apparatus according to any one of claims 3 to 7. A post-processing device according to any one of claims 1 to 9,
The upstream device;
The downstream device;
Comprising
Image forming system.