JP6146610B2 - Folding line forming device, post-processing device and image forming device - Google Patents

Description

  The present invention relates to a folding line forming apparatus, a post-processing apparatus, and an image forming apparatus.

Patent Document 1 has an auxiliary mechanism that forms a crease in a first direction orthogonal to the conveyance direction on the paper in order to assist the folding of the paper, and this auxiliary mechanism is movable in the first direction. A configuration is disclosed that includes a movable body and a disk-shaped roller blade that is rotatably attached to the movable body and folds a sheet.
In Patent Document 2, when the paper is fixed so that the upper block 20 and the lower block 21 face each other and the front part of the paper in the traveling direction is sandwiched, the convex member 19 and the concave member 18 are engaged with each other. A crease device that controls a fixed position of a sheet by using a sheet conveying unit and a sheet fixing unit so that a predetermined fold position F is positioned on a straight line Y connecting the apex of the convex part 19a and the apex of the concave part 18a. It is disclosed.

JP 2008-214104 A JP 2011-105494 A

  An object of the present invention is to provide a folding line forming apparatus, a post-processing apparatus, and an image forming apparatus that can form various folding lines on a recording medium without replacing parts.

The present invention according to claim 1 has a first member and a second member provided to face each other so as to sandwich the recording medium, and at least one of the first member and the second member is Fold formation with different shapes of surfaces that are rotatably supported, have at least two fixed positions, and further face the second member or the first member at the at least two fixed positions. part have a said fold muscle forming section, according to the number of the recording medium is superimposed when the recording medium is folded, toward the outer consisting recording medium is opposed to get a thick creases when folded folding A muscle forming device.

  According to a second aspect of the present invention, the crease forming portion is different in how the recording medium after the crease has been creased in the front and back direction of the recording medium according to the direction of folding formed on the recording medium. The folding line forming apparatus according to claim 1, which is opposed to each other.

The present invention according to claim 3 has a first member and a second member provided to face each other so as to sandwich the recording medium, and at least one of the first member and the second member is Fold formation with different shapes of surfaces that are rotatably supported and have at least four fixed positions, and further face the second member or the first member at the at least four fixed positions. The folding line forming unit can reverse the folding direction , and the folding line is formed on the thin recording medium when the folding line is formed on the thick recording medium according to the thickness of the recording medium. a Orisuji forming apparatus you opposed to get thick creases than when put.

The present invention according to claim 4 has a first member and a second member provided to face each other so as to sandwich the recording medium, and at least one of the first member and the second member is Fold formation with different shapes of surfaces that are rotatably supported and have at least four fixed positions, and further face the second member or the first member at the at least four fixed positions. The folding line forming part can reverse the folding direction, and when applying a folding line to a hard recording medium according to the type of the recording medium, the folding line forming part is applied to a soft recording medium. a Orisuji forming apparatus you opposed to get thick creases than when put crease.

According to a fifth aspect of the present invention, there is provided a conveyance path through which a recording medium is conveyed, and a crease forming device that forms a crease in the recording medium conveyed to the conveyance path. And a first member and a second member provided to face each other so as to sandwich the recording medium, and at least one of the first member and the second member is rotatably supported, and has at least two fixed positions, further wherein have a second member or different folding myogenesis portion shape of the first member opposed to and face at least two fixed positions, the folding myogenesis portion Is a post-processing device that faces the outer side of the recording medium so that a thicker crease is formed when the recording medium is folded according to the number of the recording medium that is stacked when the recording medium is folded .

According to a sixth aspect of the present invention, there is provided an image forming apparatus main body and a post-processing apparatus that is detachably attached to the image forming apparatus main body, and the post-processing apparatus is configured to convey a recording medium. And a folding line forming device for forming a folding line on the recording medium conveyed to the conveyance path, wherein the folding line forming device is provided so as to face the recording medium. And at least one of the first member and the second member is rotatably supported, has at least two fixed positions, and further has the at least two fixed positions. in possess shape of the second member or the first member opposed to and face a different folding myogenesis portion, the folding muscle forming unit, according to the number of the recording medium is superimposed when the recording medium is folded When the paper is folded, the outer side of the recording medium should be paired with a thick crease. An image forming apparatus.

According to the first aspect of the present invention, it is possible to provide a folding line forming apparatus that can reduce the labor of replacement compared to the case where a plurality of folding lines are formed on a recording medium by exchanging parts. it can. Also, according to the number of recording media stacked when the recording medium is folded, the bookbinding operation can be facilitated as compared with the case where the outer recording medium does not have a thick crease when folded. A folding line forming device can be provided.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, in the case of mountain fold, it is preferable to have a stripe on the back surface side of the recording medium, and in the case of valley fold, the front surface side of the recording medium. Compared with the case where a crease is made regardless of the folding direction when folding is easy, a crease forming apparatus that can attach a crease that matches the folding direction can be provided.

According to the third aspect of the present invention, it is possible to provide a folding line forming apparatus that can reduce the labor of replacement compared to the case where a plurality of folding lines are formed on a recording medium by exchanging parts. it can. Further, it is possible to provide a crease forming apparatus capable of applying a crease according to the thickness of the recording medium as compared with the case where the crease is provided regardless of the thickness of the recording medium.

According to the fourth aspect of the present invention, it is possible to provide a folding line forming apparatus that can reduce the time and effort of replacement as compared with the case where a plurality of folding lines are formed on a recording medium by exchanging parts. it can. Further, it is possible to provide a crease forming apparatus capable of applying a crease according to the type of the recording medium, as compared with the case where the crease is provided regardless of the type of the recording medium.

According to the fifth aspect of the present invention, it is possible to provide a post-processing apparatus that can reduce the labor of replacement as compared with the case where a plurality of creases are formed on a recording medium by replacing parts. . Also, according to the number of recording media stacked when the recording medium is folded, the bookbinding operation can be facilitated as compared with the case where the outer recording medium does not have a thick crease when folded. An aftertreatment device can be provided.

According to the sixth aspect of the present invention, it is possible to provide an image forming apparatus that can reduce the labor of replacement as compared with the case where a plurality of creases are formed on a recording medium by replacing parts. . Also, according to the number of recording media stacked when the recording medium is folded, the bookbinding operation can be facilitated as compared with the case where the outer recording medium does not have a thick crease when folded. An image forming apparatus can be provided.

1 is an overall configuration diagram of an image forming apparatus according to an embodiment of the present invention. 1 is a diagram illustrating a post-processing device used in an image forming apparatus according to an embodiment of the present invention. 2A and 2B show a cutting unit used in a post-processing apparatus according to an embodiment of the present invention, in which FIG. 1A is a diagram viewed from a lateral surface with respect to a recording medium conveyance direction, and FIG. It is. It is a figure which shows the cutting part periphery used for the post-processing apparatus which concerns on one Embodiment of this invention. It is the figure which looked at the cutting part periphery used for the post-processing apparatus which concerns on one Embodiment of this invention from the upper direction. It is a schematic diagram which shows the conveyance path from the cutting part used for the post-processing apparatus which concerns on one Embodiment of this invention to an accommodating part. It is a figure which shows the crease forming apparatus periphery used for the post-processing apparatus which concerns on one Embodiment of this invention, Comprising: It is a figure which shows an example of a movement when not forming a crease. It is a figure which shows the crease forming apparatus periphery used for the post-processing apparatus which concerns on one Embodiment of this invention, Comprising: An example of a movement at the time of forming a crease is shown It is a figure explaining a motion of a block used for a crease forming device concerning one embodiment of the present invention. 1 is a diagram illustrating a hardware configuration of an image forming apparatus according to an embodiment of the present invention. It is a flowchart figure which shows the operation | movement in the crease forming apparatus which concerns on one Embodiment of this invention. It is a figure which shows the block which concerns on the 2nd Embodiment of this invention. It is a figure which shows the block which concerns on the 3rd Embodiment of this invention. It is a figure which shows the block which concerns on the 4th Embodiment of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing an image forming apparatus 10 according to an embodiment of the present invention.

  The image forming apparatus 10 includes an image forming apparatus main body 12 and a post-processing apparatus 14. The image forming apparatus main body 12 has, for example, three stages of recording medium supply cassettes 16, and each of these recording medium supply cassettes 16 is provided with a supply head 18.

  When one of the recording medium supply cassettes 16 is selected, the supply head 18 is operated to supply the selected recording medium supply cassette 16 to the image forming unit 22 through the recording medium supply path 20.

  The image forming unit 22 is provided with yellow, magenta, cyan, and black photoconductors 24 and an intermediate transfer belt 26.

  A charging device, an exposure device, a developing device, a primary transfer device, a cleaning device, and the like (not shown) are arranged around each photoconductor 24, and a toner image formed on each photoconductor 24 is transferred to the intermediate transfer belt 26. Transcribed. When black and white is set, only black is enabled.

  The toner image on the intermediate transfer belt 26 is transferred to the sent recording medium P by the secondary transfer roll 28, fixed by the fixing device 30, and the recording medium P on which the toner image is fixed is the recording medium discharge path 32. And is discharged by the discharge roll 34.

  However, when duplex printing is set, the recording medium P whose surface is fixed by the fixing device 30 is sent from the recording medium discharge path 32 to the reversing device 36 and is reversed by the reversing device 36, and the recording medium reversing path. 38, is returned again to the recording medium supply path 20, and is sent to the image forming unit 22 for printing on the back side.

  Next, the post-processing device 14 according to an embodiment of the present invention will be described.

  As shown in FIG. 2, the post-processing device 14 corrects the conveyance path 40 as a conveyance unit for conveying the recording medium and the inclination (registration, skew) of the recording medium P conveyed from the upstream side in the recording medium conveyance direction. A registration roll 43 as a correction unit to be detected, a detection unit 51 such as a line sensor for detecting the leading end of the recording medium P corrected by the registration roll 43, and a folding line forming device 42 for forming a folding line in the conveyed recording medium P. Cutting sections 44, 44 for cutting the recording medium P to be transported in the transport direction, and unnecessary portions CP of the recording medium P provided below the cutting sections 44, 44 and cut by the cutting sections 44, 44. It has the accommodating part 45 which accommodates. Further, above the entrance 49 of the accommodating portion 45, cutting portions 46, 46 for further finely cutting (cutting) the recording medium unnecessary portion CP cut by the cutting portions 44, 44 are provided.

  The conveyance path 40 is S-shaped, and includes a first conveyance path 40a that bends in one direction, and a second conveyance path 40b that bends in the other direction following the first conveyance path 40a. .

  The first conveyance path 40a is provided with a crease forming device 42 as a first processing unit that performs processing on the recording medium P to be conveyed.

  The first transport path 40a is branched to the branch path 41a on the upstream side of the registration roll 43 in the recording medium transport direction. The branch path 41a is a conveyance path for carrying out the recording medium P to the discharge port 53 (outside the post-processing device 14) without passing through the processing unit, and is conveyed when the recording medium P is not processed. 53 is discharged.

  The second transport path 40b is provided with cutting units 44 and 44 as second processing units for processing the recording medium P to be transported. Two cutting portions 44 are provided in the width direction of the second transport path 40b.

The second transport path 40b is branched into a branch path 41b, a branch path 41c, a branch path 41d, and a branch path 41e on the downstream side of the cutting units 44 and 44 in the recording medium transport direction.
The branch path 41b is a transport path that holds the processed recording medium P, and functions as a buffer unit so as to transport the recording medium transported from the branch path 41c to the discharge port 53 simultaneously or continuously. (Hereinafter, the branch path 41b is referred to as a buffer section 41b). The branch path 41 c is a transport path that transports the processed recording medium P toward the discharge port 53. The branch path 41d and the branch path 41e are branched from both ends of the branch path 41c and provided in parallel, and a transport path for transporting the unnecessary portion CP of the recording medium cut by the cutting sections 44 and 44 toward the storage section 45. It is.

  The length of the conveyance path from the folding line forming device 42 to the cutting unit 44 is equal to or longer than the length of the recording medium P to be conveyed. Further, the length of the conveyance path 40 from the carry-in entrance 39 of the conveyance path 40 to the registration roll 43 is equal to or longer than the length of the recording medium P to be conveyed.

  3A and 3B show a cutting unit 44 according to an embodiment of the present invention, in which FIG. 3A is a diagram seen from the side with respect to the recording medium conveyance direction, and FIG. 3B is a diagram seen from the recording medium conveyance direction. is there.

As shown in FIG. 3A, the cutting unit 44 includes a pressing unit 47 provided on the upper side and a rotary cutter 48 provided on the lower side across the second conveyance path 40b. Is done. Further, as shown in FIG. 3B, two cutting portions 44 are provided in the width direction of the second transport path 40b.
The rotary cutter 48 is disposed at a portion to be cut of the recording medium P, rotates clockwise, and cuts while conveying the recording medium P.
The pressing portion 47 is disposed at a position facing the rotary cutter 48 and presses the recording medium P to be cut by rotating counterclockwise.
In other words, the rotary cutters 48, 48 provided at positions facing the second transport path 40 b are pressed by the pressing portions 47, 47 while the pressing portions 47, 47 rotate and hold both ends of the recording medium P to be conveyed. , The recording medium P is cut in the transport direction while being transported, and both ends (top and bottom portions) of the recording medium P are cut.
Further, the cutting units 44 and 44 are positioned at positions to be cut by detection by the detection unit 51, and are moved to the left and right according to the width to be cut.

  FIG. 4 shows the periphery of the cutting section 46 according to an embodiment of the present invention.

The cutting part 46 is provided in each of the branch path 41d and the branch path 41e.
Here, since the cutting part 46 provided in the branch path 41d and the branch path 41e has the same configuration, the branch path 41d will be described in detail.
The cutting part 46 has a fixed blade 56 and a rotary blade 58.
The fixed blade 56 is fixed to the branch path 41d. The rotary blade 58 is provided at a position facing the fixed blade 56 with the branch path 41d interposed therebetween, and an unnecessary portion CP of the recording medium that passes between the fixed blade 56 and the rotary blade 58 as the rotary blade 58 rotates. Is finely cut (cut).

  Here, the unnecessary portion CP is transported to the branch path 41 d, and the recording medium P from which the unnecessary section is cut is transported to the branch path 41 c and transported to the discharge port 53. At this time, if the unnecessary portion CP is cut in the cutting portion 46 while the recording medium P from which the unnecessary portion CP is cut is transported, the unnecessary portion CP stops in the cutting portion 46 for a moment. Thereby, a loop (bending) occurs, and clogging (jam) of the unnecessary portion CP may occur. In the present embodiment, movable members 60 and 60 are provided as loop absorption portions (bending absorption portions) that absorb the loops at the branch portions 41d and 41e where the loops are generated, respectively.

  The movable member 60 is provided at a movable portion 62 as a chute, a fulcrum 64 provided at the downstream end of the movable portion 62 in the recording medium conveyance direction, and an end portion of the movable portion 62 at the upstream side in the recording medium conveyance direction. For example, it is composed of a biasing member 66 such as a spring. The movable part 62 is made of a soft material such as silicon. That is, the upstream side of the movable member 60 in the conveyance direction of the recording medium is configured to open with respect to the second conveyance path 40b. The upstream side in the medium conveyance direction is opened to absorb the loop. As a result, the occurrence of jamming (jam) of the recording medium passing through the cutting unit 46 is prevented.

  FIG. 5 is a view of the periphery of the cutting portions 44, 44 from above, and FIG. 6 is a schematic diagram showing a conveyance path from the cutting portion 44 to the accommodating portion 45.

  As shown in FIGS. 5 and 6, the recording medium unnecessary portion CP cut by the cutting portions 44 and 44 is guided to the movable members 60 and 60 and conveyed to the branch path 41d and the branch path 41e, respectively. Then, the paper passes through the cutting portions 46 and 46, is further cut finely, and is discharged to the accommodating portion 45. On the other hand, the recording medium P from which unnecessary portions have been cut is conveyed to the branch path 41 c and discharged to the discharge port 53.

  7 and 8 are views showing the vicinity of the folding line forming device 42 according to an embodiment of the present invention. FIG. 7 shows an example of the movement when the folding line is not formed, and FIG. It is a figure which shows an example of the movement at the time of forming a line | wire.

  The crease forming device 42 includes an upper block 50a as a first member provided above the first conveyance path 40a, a lower block 50b as a second member provided below, The block 50b is rotatably and movably held, and includes a press release mechanism 70 that presses the lower block 50b against the upper block 50a and releases the press contact.

The upper block 50a has a columnar shape, and a shaft portion 55a is provided substantially at the center and is rotatably supported.
The lower block 50b has a columnar shape, and a shaft portion 55b is provided substantially at the center and is rotatably supported.

On the respective surfaces of the upper block 50a and the lower block 50b, concave portions and convex portions as fold line forming portions are formed at intervals of about 180 degrees.
Specifically, a triangular groove 52a as a concave portion is formed on one surface of the upper block 50a, and a triangular protrusion 54a as a convex portion is formed on the surface opposite to the triangular groove 52a. Further, a triangular groove 52b as a concave portion is formed on one surface of the lower block 50b, and a triangular protrusion 54b as a convex portion is formed on the surface opposite to the triangular groove 52b.

  A drive source 72a such as a motor for rotating the upper block 50a and the shaft portion 55a of the upper block 50a are connected via a gear train as drive transmission means. That is, the gear 76a meshes with the drive shaft 74a of the drive source 72a, and the gear 80a fixed coaxially with the shaft portion 55a meshes with the gear 78a fixed coaxially with the gear 76a. Thereby, the upper block 50a is rotatably supported and is fixed at two fixed positions.

  A drive source 72b such as a motor for rotating the lower block 50b and the shaft portion 55b of the lower block 50b are connected via a gear train as drive transmission means. That is, the gear 76b meshes with the drive shaft 74b of the drive source 72b, and the gear 80b fixed coaxially with the shaft portion 55b meshes with the gear 78b fixed coaxially with the gear 76b. Thereby, the lower block 50b is rotatably supported and is fixed at two fixed positions.

  The pressure release mechanism 70 includes an arm portion 84 that rotatably supports the lower block 50b, an urging member 86 such as a pressure spring provided on the arm portion 84, and a cam 87 that moves the arm portion 84. Is composed of. The arm portion 84 includes a first arm portion 84a that supports the lower block 50b, and a second arm portion 84b that is bent and connected to the first arm portion 84a via a shaft 91. An urging member 86 is provided between the first arm portion 84 a and the second arm portion 84 b and in the vicinity of the shaft 91. A gear 93 that meshes with the cam 87 is provided at the tip of the second arm portion 84b.

  That is, when the cam 87 is rotated about the shaft 97, the gear 93 is rotated, and the lower block 50b is moved toward the upper block 50a with the fulcrum 95 as a fulcrum via the urging member 86. In addition, the pressure contact is released after being separated.

  FIG. 9 is a diagram showing the movement of the upper block 50a and the lower block 50b used in the folding line forming device 42 according to the embodiment of the present invention.

  When forming a crease line in the recording medium P to be conveyed, as shown in FIG. 9A, the triangular protrusions 54a of the upper block 50a and the triangular grooves 52b of the lower block 50b are the first conveying path. 40a is rotated and fixed at a position facing each other (first fixing position), the lower block 50b is moved toward the upper block 50a, and the triangular protrusion 54a and the triangular groove 52b are fitted to each other, so that the lower block 50b comes into pressure contact with the upper block 50a to make a crease in the recording medium P to be conveyed. Further, as shown in FIG. 9C, the triangular groove 52a of the upper block 50a and the triangular protrusion 54b of the lower block 50b are respectively rotated and fixed at positions facing the first transport path 40a. (Second fixed position), the lower block 50b moves toward the upper block 50a, the triangular groove 52a and the triangular protrusion 54b are fitted, and the lower block 50b is pressed against the upper block 50a and conveyed. By attaching a crease line to the medium P, a crease line that is the reverse of the folding direction described above is formed. That is, the crease formed at the first fixed position and the crease formed at the second fixed position are formed with different changes in the front and back directions of the recording medium.

  Further, when the recording medium P to be conveyed is passed without forming a crease, as shown in FIG. 7, the upper block 50a and the lower block 50b are separated from each other, as shown in FIG. 9B. As shown, the triangular protrusions 54a and the triangular grooves 52a of the upper block 50a, and the triangular protrusions 54b and the triangular grooves 52b of the lower block 50b may be rotated so as to be arranged in a substantially horizontal direction with respect to the conveyance path 40a. .

  That is, recesses and protrusions as crease forming portions having different shapes are formed in each of the blocks 50a and 50b, which are column bodies, about 180 degrees, and rotated about 180 degrees around the shaft portions 55a and 55b. As a result, creases in two different directions are formed. That is, the folding direction can be reversed without automatic block replacement, and automatic operation is also possible.

  FIG. 10 is a diagram illustrating a hardware configuration of the image forming apparatus 10 according to an embodiment of the present invention.

  The control unit 88 has a configuration in which a CPU 90, a memory 92, an operation unit 94, and an input / output unit 96 are connected by an internal bus 98. The input / output unit 96 is connected to the image forming unit 22, the secondary transfer roll 28, the fixing device 30, the transport system, the post-processing device 14, and the like. As the image forming unit 22, a motor for rotating the photoconductor 24 and a motor for rotating a support roll for supporting the intermediate transfer belt 26 are controlled. Further, as a transport system, each transport roll that transports the recording medium is controlled by a drive unit such as a motor.

  The post-processing device 14 is connected to a crease forming device 42, a cutting unit 44, a cutting unit 46, a storage unit 45, and the like. As the crease forming part 42, driving sources 72a and 72b, which are motors for rotating the upper block 50a and the lower block 50b, a motor for moving the lower block 50b toward the upper block 50a, and a motor for releasing the pressure contact, etc. Is controlled. Further, as the cutting unit 44, a motor for rotating the rotary cutter 48, a motor for rotating the pressing unit 47, and the like are controlled. Further, a motor or the like that rotates the rotary blade 58 is controlled as the cutting unit 46. Further, as the storage unit 45, a detection unit that detects the fullness of the storage unit 45 and each transport roll that transports the recording medium by detecting the mounting of the storage unit are controlled by a drive unit such as a motor.

  That is, the control unit 88 has a component as a computer, and a supply unit that supplies a recording medium is selected by the input of the operation unit 94, and the CPU 90 is in the selected post-processing device stored in the memory 92. Acquire setting parameters such as the folding line shape and folding direction of the folding line forming device 42, the cutting position of the cutting unit 44, the rotation speed of the cutting unit 46, and the like, and execute the program based on the acquired parameters To control the post-processing operation of the post-processing device 14.

Next, the crease formation process of the crease formation apparatus 42 according to an embodiment of the present invention will be described.
Each process is controlled by the control unit 88.
FIG. 11 is a flowchart showing the operation of the crease forming device 42.

  First, in step S10, the upper block 50a and the lower block 50b are separated from each other and the pressure contact is released (standby state).

  Next, in step S <b> 12, a job is received by operating the operation unit 94.

  Next, in step S14, conveyance of the recording medium P is started.

  Next, in step S <b> 16, the leading end of the recording medium P is detected by the detection unit 51.

  Next, in step S18, the conveyance of the recording medium P is stopped at a predetermined position on the conveyance path 40a between the upper block 50a and the lower block 50b.

  Next, in step S <b> 20, the upper block 50 a and the lower block 50 b are rotated and fixed at a fixed position designated by the operation of the operation unit 94.

  Next, in step S <b> 22, the lower block 50 b moves in the direction in which it is pressed toward the upper block 50 a by the action of the pressure release mechanism 70, and a crease is formed on the recording medium P.

  Next, in step S24, the lower block 50b moves from the upper block 50a in the direction of releasing the pressure contact by the action of the pressure release mechanism 70.

  Next, in step S26, the conveyance of the recording medium P is started.

  Further, the recording medium P on which the crease is formed by the crease forming device 42 is overlaid by the buffer unit 41b in accordance with the number of recording media of one job. At this time, the stacked recording media P are overlaid so that there is no deviation so that no deviation occurs. The plurality of recording media P overlapped by the buffer unit 41 b are discharged from the discharge port 53 to the discharge tray. In this case, the user folds and binds the recording medium P with the crease line discharged to the discharge tray. Note that another post-processing device 2 having the folding device 4 may be connected to the post-processing device 14. In this case, the post-processing device 2 is further connected to the input / output unit 96 of the control unit 88, and The processing device 2 is connected to the folding device 4 and controlled by the control unit 88.

  Next, another embodiment of the block 50 used in the folding line forming apparatus 42 according to one embodiment of the present invention will be described.

FIG. 12 is a diagram showing a block 100 according to the second embodiment of the present invention.
The block 100 according to the second embodiment is a recording medium that is thinner than a reference recording medium, and is used, for example, when a crease is formed on paper that is thinner than plain paper.

  The block 100 includes an upper block 100a as a first member provided above and a lower block 100b as a second member provided below with the first transport path 40a interposed therebetween.

  The upper block 100a and the lower block 100b are columnar, and a concave portion and a convex portion as a crease forming portion are formed on each surface about every 180 degrees.

In the upper block 100a, a triangular groove 102a as a concave portion and a triangular protrusion 104a as a convex portion are formed approximately every 180 degrees around the shaft portion 55a.
Further, the lower block 100b is formed with a triangular groove 102b as a concave portion and a triangular protrusion 104b as a convex portion approximately every 180 degrees around the shaft portion 55b.

The triangular grooves 102a and 102b of the block 100 are shallower than the triangular grooves 52a and 52b of the block 50 according to the above-described embodiment, and are gently inclined. The surface on which the triangular grooves 102a and 102b are formed is chamfered.
The triangular protrusions 104a and 104b of the block 100 are formed with a gentler slope than the triangular protrusions 54a and 54b of the block 50 according to the above-described embodiment.

  Then, the triangular groove 102a of the upper block 100a and the triangular protrusion 104b of the lower block 100b are rotated and fixed to fit to each other (first fixing position), and the triangular protrusion 104a and the lower block 100b of the upper block 100a are fitted. The triangular groove 102b is rotated and fixed to the opposite position so as to be fitted (second fixed position), and a crease is formed on the recording medium that is thin relative to the reference recording medium. Even in this case, a fold line corresponding to a thin recording medium can be formed, and the folding direction can be reversed.

FIG. 13 is a diagram showing a block 106 according to the third embodiment used in the folding line forming device 42 according to one embodiment of the present invention.
The block 106 according to the third embodiment is a recording medium that is thicker than a reference recording medium, and is used, for example, when a crease is formed on paper that is thicker than plain paper.

  The block 106 includes an upper block 106a as a first member provided above and a lower block 106b as a second member provided below with the first transport path 40a interposed therebetween.

  The upper block 106a and the lower block 106b are columnar, and a concave portion and a convex portion as a crease forming portion are formed on each surface about every 180 degrees.

In the upper block 106a, a square groove 108a as a concave portion and a protrusion 110a as a convex portion are formed approximately every 180 degrees around the shaft portion 55a.
Further, the lower block 106b is formed with a square groove 108b as a concave portion and a protrusion 110b as a convex portion approximately every 180 degrees around the shaft portion 55b.

  Then, the angular groove 108a of the upper block 106a and the protrusion 110b of the lower block 106b are rotated and fixed to fit to each other (first fixing position), and the corner of the protrusion 110a of the upper block 106a and the corner of the lower block 106b In the case where the groove 108b is rotated and fixed to the opposite position so as to be fitted (second fixing position), and a crease is formed on a recording medium that is thicker than the reference recording medium. Even when compared with the case where the block 100 according to the second embodiment described above is used, a thick crease is formed, and a crease according to a thick recording medium can be formed. Can be reversed. Further, the block 106 according to the present embodiment can be used not only for a thick recording medium but also for a hard recording medium P.

FIG. 14 is a diagram showing a block according to the fourth embodiment used in the folding line forming device 42 according to one embodiment of the present invention.
The block 112 according to the fourth embodiment has four fold line forming portions.

  The block 112 includes an upper block 112a as a first member provided above and a lower block 112b as a second member provided below with the first transport path 40a interposed therebetween.

  The upper block 112a and the lower block 112b are columnar, and a concave portion and a convex portion as a crease forming portion are formed on the side surface at approximately 90 degrees.

The upper block 112a includes a triangular groove 102a as a concave portion used for attaching a crease to the thin recording medium described above, a triangular protrusion 104a as a convex portion, and a concave portion used for attaching a crease to a thick recording medium. Are formed at intervals of approximately 90 degrees with the shaft portion 55a as an axis.
Further, the lower block 112b is used for forming a crease in a triangular groove 102b as a concave portion used for making a crease in the thin recording medium described above, a triangular protrusion 104b as a convex portion, and a thick recording medium. A rectangular groove 108b serving as a concave portion and a projection 110b serving as a convex portion are formed approximately every 90 degrees with the shaft portion 55b as an axis.

  The triangular groove 102a of the upper block 112a and the triangular protrusion 104b of the lower block 112b are rotated and fixed and fitted into a position facing each other (first fixing position), and the triangular protrusion 104a of the upper block 112a and the triangular protrusion of the lower block 112b The groove 102b is rotated and fixed to the opposite position to be fitted (second fixing position), and the rectangular groove 108a of the upper block 112a and the protrusion 110b of the lower block 112b are rotated and fixed to the opposite position. (The third fixed position), the protrusion 110a of the upper block 112a and the square groove 108b of the lower block 112b are rotated and fixed to be opposed to each other (the fourth fixed position). Thus, a crease according to the thickness of the recording medium can be formed, and the folding direction can be reversed.

  That is, irregularities having different shapes are formed on each of the upper block 112a and the lower block 112b at about 90 degrees, and rotated about 90 degrees about the shaft portions 55a and 55b, so that four differently shaped folding lines are formed. It is formed. That is, fold lines having different shapes can be formed without exchanging blocks, the folding direction can be reversed, and automatic operation is also possible.

  In the present embodiment, the example in which two fold line forming portions having different shapes are provided in the upper block and the lower block and the example in which four crease forming portions are provided have been described. It is also possible to make them different and rotate them. Specifically, the upper block is provided with a fold line forming portion having a different convex shape and is configured to be rotatable, and the lower block is held in a concave shape without rotating, and faces the two shapes of the upper block. The concave shape of the lower block may be a large concave shape so as to fit into each of the two convex shapes of the upper block. Moreover, even if it does not make it large, you may make it fit to an upper block by lowering hardness than an upper block.

  Further, in the present embodiment, an example in which the same streak is made regardless of the number of the recording media to be overlaid has been described. However, the present invention is not limited to this, and the recording medium disposed outside when the recording medium is folded is more preferable. You may comprise so that a thicker folding line may be attached. Specifically, when forming a crease line on a recording medium disposed on the outside, for example, the square groove 108b and the protrusion 110a are combined and formed, and the crease line is formed on the recording medium disposed on the inside. For example, the crease may be formed by fitting and combining the corner projections 104a and the triangular grooves 102b.

  Moreover, in this embodiment, although the example which provided two crease formation parts of a different shape in each of an upper block and a lower block and the example which provided four were demonstrated, not only this but what provided two or more Use it.

  Further, in the present embodiment, the configuration in which the pressure release mechanism 70 is provided in the lower block 50b has been described. However, the present invention is not limited thereto, and the pressure release mechanism 70 may be provided in the upper block 50a. 50b may be provided on both.

  In the present embodiment, the example using the post-processing device 14 having the cutting unit 44 and the cutting unit 46 in addition to the crease forming unit device 42 has been described. However, the present invention is not limited thereto, and other processing is performed. It can also be used in a post-processing apparatus.

  In addition, this invention is not limited to said embodiment.

  As described above, the present invention can be applied to image forming apparatuses and post-processing apparatuses such as copying machines, printers, and facsimile machines.

DESCRIPTION OF SYMBOLS 10 ... Image forming apparatus 12 ... Image forming apparatus main body 14 ... Post-processing apparatus 15 ... Post-processing apparatus main body 40 ... Conveyance path 42 ... Folding line forming apparatus 43 ... Registration roll 44 ... Cutting part 45 ... Accommodating part 46 ... Cutting part 50,100,106,112 ... Block 51 ... Detecting part

Claims (6)

A first member and a second member provided to face each other so as to sandwich the recording medium;
At least one of the first member and the second member is rotatably supported and has at least two fixed positions;
Further have at the least two different folded myogenesis section shape of the fixed position second member or the first member opposed to that surface,
The crease forming portion is opposed to the outer side of the recording medium so that a thicker crease is formed when the recording medium is folded according to the number of recording media stacked when the recording medium is folded. Forming equipment.   2. The crease forming portion is opposed to the recording medium after the crease is formed in accordance with the direction of folding formed on the recording medium so that the deformation in the front and back directions of the recording medium differs. Folding line forming device. A first member and a second member provided to face each other so as to sandwich the recording medium;
At least one of the first member and the second member is rotatably supported and has at least four fixed positions;
Furthermore, it has a crease forming part having a different shape of the surface facing the second member or the first member at the at least four fixed positions,
The crease forming portion can reverse the direction of folding, and according to the thickness of the recording medium, when forming a crease on a thick recording medium, compared to when forming a crease on a thin recording medium. opposed to get thick creases are <br/> Orisuji forming apparatus. A first member and a second member provided to face each other so as to sandwich the recording medium;
At least one of the first member and the second member is rotatably supported and has at least four fixed positions;
Furthermore, it has a crease forming part having a different shape of the surface facing the second member or the first member at the at least four fixed positions,
The crease forming unit can reverse the folding direction, and when applying a crease to a hard recording medium according to the type of the recording medium, opposed to get a thick creases than <br/> Orisuji forming apparatus. A conveyance path through which the recording medium is conveyed;
A crease forming device that forms a crease in the recording medium conveyed to the conveyance path,
The crease forming device includes a first member and a second member provided to face each other so as to sandwich a recording medium, and at least one of the first member and the second member is rotated. It is rotatably supported, and at least two have a fixed position, and further have the said at least two different folded myogenesis portion shape of the second member or the first member opposed to that surface in a fixed position ,
The crease forming unit is opposed to the outer side of the recording medium so that a thicker crease is formed when the recording medium is folded according to the number of recording media stacked when the recording medium is folded. apparatus. An image forming apparatus main body, and a post-processing apparatus detachably attached to the image forming apparatus main body,
The post-processing device includes:
A conveyance path through which the recording medium is conveyed;
A crease forming device that forms a crease in the recording medium conveyed to the conveyance path,
The crease forming device includes a first member and a second member provided to face each other so as to sandwich a recording medium, and at least one of the first member and the second member is rotated. It is rotatably supported, and at least two have a fixed position, and further have the said at least two different folded myogenesis portion shape of the second member or the first member opposed to that surface in a fixed position ,
The crease forming unit is opposed to the outer side of the recording medium so that a thicker crease is formed when the recording medium is folded in accordance with the number of recording media stacked when the recording medium is folded. apparatus.

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