JP4159412B2 - Sheet folding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is, for example, attached to an image forming apparatus such as a copying machine, a printer, and a complex machine thereof, and is folded in half or Z-fold while conveying a sheet material such as paper that is sent out by the image forming apparatus after image formation. The present invention relates to a sheet folding device for discharging to the outside.
[0002]
[Prior art]
Conventionally, this type of sheet folding apparatus has a configuration as shown in FIG. In the through-pass mode in which the sheet material is not bent, the sheet material sent from the discharge port of the image forming apparatus is received from the carry-in port 1 and conveyed by the carry-in roller pair 2 and switched by the first switching member 3 to be changed. The paper was discharged from the discharge port 6 to the outside by the discharge roller pair 5 through the one conveyance path 4.
[0003]
In the bi-fold mode, the first switching member 3 switches to the second transport path 7, the second switching member 8 switches to the first switchback path 9, and the tip is placed on the first stopper 10. The sheet material is bent by the first loop forming portion a to form a loop, and the loop is inserted between the first folding roller 11 and the second folding roller 12 and folded at the center in the length direction of the sheet material. . Thereafter, the third switching member 13 puts it between the second folding roller 12 and the third folding roller 14, then the fourth switching member 15 puts it between the third folding roller 14 and the fourth folding roller 16, and the third conveying path 17. The paper was discharged from the discharge port 6 to the outside by the discharge roller pair 5.
[0004]
In the Z-fold mode, the first switching member 3 switches to the second transport path 7, the second switching member 8 switches to the first switchback path 9, and the solenoid 18 performs the first switchback. The sheet material is bent at the first loop forming portion a by abutting the tip of the second stopper 19 that has entered the path 9 to form a loop, and the loop is formed between the first folding roller 11 and the second folding roller 12. And fold the sheet material as the first fold. Thereafter, the third switching member 13 is switched to enter the second switchback path 20, and the first fold is abutted against the third stopper 21 to bend the sheet material at the second loop forming portion b to form a loop. Then, the loop is inserted between the second folding roller 12 and the third folding roller 14, the sheet material is folded with the center in the length direction as the second fold, and Z-folded, and the fourth switching member 15 uses the third folding roller. 14 and the fourth folding roller 16, and discharged from the discharge port 6 to the outside by the discharge roller pair 5 through the third conveyance path 17.
[0005]
In the back Z-folding mode, the first switching member 3 switches to the second transport path 7 and the second switching member 8 switches between the first folding roller 11 and the second folding roller 12, 3 is switched by the switching member 13 to enter the second switchback path 20 and the tip is abutted against the third stopper 21 to bend the sheet material at the second loop forming portion b to form a loop. The sheet is placed between the second folding roller 12 and the third folding roller 14, and the position of the front end quarter of the sheet material is folded as a first fold. Thereafter, the fourth switching member 15 is switched to enter the third switchback path 22, and the first fold is abutted against the fourth stopper 23 to bend the sheet material at the third loop forming portion c to form a loop. Then, the loop is inserted between the third folding roller 14 and the fourth folding roller 16 and folded with the center in the length direction of the sheet material as the second fold. 5 was discharged from the discharge port 6 to the outside.
[Patent Document 1]
JP 61-243771 A
[0006]
[Problems to be solved by the invention]
However, in such a conventional sheet folding apparatus, the length from the first to fourth stoppers 10, 19, 21, and 23 to the first to third loop forming portions a, b, and c is long, and the sheet material If the waist is weak or the humidity is high, there is a problem that bending occurs between the stoppers 10, 19, 21, and 23 and the respective loop forming portions a, b, and c, and the folding positions vary.
[0007]
In addition, if the stopper is moved and adjusted according to the sheet material size and folding form to secure an accurate folding position, the stopper movement adjustment mechanism becomes complicated and expensive, and a large space is required and the size is increased. There was a problem to do.
[0008]
Accordingly, a first object of the present invention is to provide a sheet folding apparatus that improves the folding position accuracy of a sheet material without increasing the size with a simple configuration.
[0009]
A second object of the present invention is to provide a sheet folding apparatus with improved productivity.
[0010]
A third object of the present invention is to provide a sheet folding apparatus that ensures stable conveyance of a sheet material.
[0011]
A fourth object of the present invention is to provide a sheet folding apparatus with improved assemblability.
[0012]
A fifth object of the present invention is to provide a sheet folding apparatus with reduced production costs and maintenance costs.
[0013]
A sixth object of the present invention is to provide a sheet folding apparatus that can perform Z-folding without increasing the size with a simple configuration and improves the folding position accuracy of the sheet material.
[0014]
A seventh object of the present invention is to provide a sheet folding apparatus provided with a crease means without particularly increasing its size when used in combination with a post-processing apparatus for punch punching.
[0015]
An eighth object of the present invention is to provide a sheet folding apparatus that further improves the folding position accuracy of the sheet material without increasing the size with a simple configuration.
[0016]
A ninth object of the present invention is to provide a sheet folding apparatus for reliably folding a sheet material.
[0017]
[Means for Solving the Problems]
  Therefore, in order to achieve the first object, the invention according to claim 1 is a sheet folding apparatus that folds and discharges a sheet material by a folding means, and the folding means is provided at a position upstream of the folding means in the sheet conveying direction. Equipped with a crease means to crease in advance at the folding position,
  The crease means includes a crease rotator having a crease protrusion in the direction of the rotation axis and the rotation axis arranged in a direction perpendicular to the sheet conveyance direction, and sandwiching the sheet conveyance path with respect to the crease rotation body. It is arranged on the opposite side, and is composed of a receiving member that creases the sheet material with being sandwiched between the crease protrusions,
  While the crease rotator and the receiving member are both roller-shaped,
  The punch is supported by the rotating shaft of one of the creasing rotator and the receiving member, and the punch receiver is supported by the other rotating shaft.It is characterized by that.
[0020]
  Claim2In order to achieve the fourth object, the invention described in claim 11In the sheet folding apparatus according to item 1, the entire peripheral surface of the receiving member is formed of an elastic material.
[0021]
  Claim3In order to achieve the fifth object, the invention described in claim 11The sheet folding apparatus according to claim 1, wherein an elastic member is provided in an axial direction on a part of the peripheral surface of the receiving member, and the sheet material is folded between the elastic member and the crease projection. .
[0022]
  Claim4In order to achieve the fifth object, the invention described in claim 11In the sheet folding apparatus described above, a receiving groove is formed in the axial direction on the peripheral surface of the receiving member, and the sheet material is folded between the receiving groove and the creasing protrusion.
[0023]
  Claim5In order to achieve the sixth object, the invention described in claim 11In the sheet folding apparatus described above, the receiving member also has a crease projection in the direction of the rotation axis.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a schematic configuration of a sheet folding apparatus according to the present invention in a use state.
[0028]
In the figure, reference numeral 100 denotes a sheet folding apparatus according to the present invention, reference numeral 200 denotes an image forming apparatus such as a copying machine, a printer, and a complex machine thereof, and reference numeral 300 denotes a post-processing apparatus that performs post-processing such as stapling. .
[0029]
The sheet folding apparatus 100 is attached to the side surface of the image forming apparatus 200 by connecting the discharge port 201 of the image forming apparatus 200 to the carry-in port 101. Further, the post-processing apparatus 300 is attached to the side surface of the sheet folding apparatus 100 by connecting the carry-in port of the post-processing apparatus 300 to the discharge port 102. Then, after image formation, a sheet material such as a sheet sent out from the discharge port 201 by the image forming apparatus 200 is carried into the sheet folding device 100 from the carry-in port 101 and is folded in two or Z-folded while being conveyed inside. It is discharged from 102, put into the post-processing apparatus 300 from the carry-in port, post-processed, and then discharged to the outside.
[0030]
The sheet folding apparatus 100 includes a first conveyance path 26 that conveys a sheet material straightly from the carry-in port 101 to the discharge port 102, and a second conveyance path 27 that branches from the first conveyance path 26 and conveys the sheet material downward. And a third transport path 28 that transports from the bottom to the top and joins the first transport path 26.
[0031]
In the first conveyance path 26, a carry-in sensor 30 near the carry-in entrance 101, a carry-in roller pair 31 at the joining position of the third conveyance path 28, and a crease 32 and a second conveyance path 27, which will be described in detail later, in the downstream. A switching member 33 and a discharge roller pair 34 are provided in front of the discharge port 102 at the branch position. The crease unit 32 preliminarily creases one or more folds at a position where the fold unit 40 folds upstream of a fold unit 40 (to be described later) in the sheet conveyance direction.
[0032]
In the second conveyance path 27, three conveyance roller pairs 35 are provided at predetermined intervals, and a first stopper 36 is provided below the conveyance path. Similarly, three pairs of conveyance rollers 37 are provided on the third conveyance path 28 at predetermined intervals.
[0033]
A folding means 40 is provided between the second conveyance path 27 and the third conveyance path 28. The folding means 40 is provided with a first folding roller 41, a second folding roller 42 that presses against the first folding roller 41, and a third folding roller 43 that presses against the second folding roller 42. A switchback path 44 is provided upward from the roller position, and a second stopper 45 is provided at the tip of the switchback path 44.
[0034]
In the through-pass mode in which the sheet material is not bent, the sheet material sent from the discharge port 201 of the image forming apparatus 200 is received from the carry-in port 101 and conveyed by the carry-in roller pair 31, and is switched by the switching member 33. The paper is fed straight from the discharge port 102 to the post-processing apparatus 300 by the discharge roller pair 34 through one conveyance path 26.
[0035]
In the bi-fold mode, when passing through the first conveying path 26, the sheet material is creased by the crease means 32 and switched by the switching member 33 to guide the sheet material to the second conveying path 27. Then, the front end is abutted against the first stopper 36. Then, the sheet is folded at the position of the fold in the first space A, and the fold is inserted between the first fold roller 41 and the second fold roller 42. The sheet material is completely folded at the center in the length direction and folded in two.
[0036]
Thereafter, from the crease position, a switching member (not shown) is inserted between the second folding roller 42 and the third folding roller 43 and led to the third transport path 28, transported by the transport roller pair 37 and passed through the third transport path 28. Returned to the one transport path 26, transported by the carry-in roller pair 31, switched by the switching member 33, and sent from the discharge port 102 to the post-processing device 300 by the discharge roller pair 34.
[0037]
In the Z-fold mode, the position of the first stopper 36 is raised by a moving mechanism (not shown) than in the double-fold mode. Then, when passing through the first conveying path 26, the sheet material is formed with two creases by the crease forming means 32, and the leading end is abutted against the first stopper 36, so that the sheet material in the first space A as shown in FIG. S is folded at the position of the first fold L1, the fold L1 is inserted between the first folding roller 41 and the second folding roller 42, and the sheet material S is folded at the position of the front end quarter.
[0038]
After that, as shown in FIG. 3, the second crease L2 is switched in the second space B by switching with a switching member (not shown) and entering the switchback path 44 and abutting the first crease L1 position against the second stopper 45. Bend at the position. Then, the crease L2 is inserted between the second folding roller 42 and the third folding roller 43, folded at the center in the length direction of the sheet material S as shown in FIG. 4, and led to the third conveying path 28. Then, it returns to the first conveyance path 26 through the third conveyance path 28, is switched by the switching member 33, and is sent out from the discharge port 102 to the post-processing device 300 by the discharge roller pair 34.
[0039]
As shown in FIG. 5, the creasing unit 32 includes a creasing rotator 50 and a receiving member 51. The creasing rotator 50 and the receiving member 51 are both formed in a roller shape, and the rotation shafts 50a and 51a are arranged in a direction orthogonal to the sheet conveying direction K, and the sheet conveying path (first conveying path 26) is sandwiched between each other. Place on the opposite side.
[0040]
The creasing rotator 50 has a crease protrusion 52 in the direction of the rotator. A gear 53 and a rotation detection plate 54 are fixed to one end of the rotation shaft 50a. The rotation detection plate 54 is provided with a notch 54a. The sensor 55 is provided so that the notch 54a can be detected. On the other hand, the receiving member 51 is formed of an elastic material such as soft rubber on the entire circumferential surface. A gear 56 that meshes with the gear 53 is fixed to the rotating shaft 51a.
[0041]
Then, the position where the sensor 55 detects the notch 54a of the rotation detection plate 54 is set as the home position, and the creased rotating body 50 and the receiving member 51 are on standby in the state shown in FIG. At this time, the sheet material S passing through the first conveyance path 26 can pass between the creasing rotator 50 and the receiving member 51 without difficulty.
[0042]
However, in the two-fold mode, as shown in FIG. 7, after the time T1 has elapsed since the carry-in sensor 30 detects the leading edge of the sheet material S, the step motor is driven to interlock the gear 53 and the gear 56. The crease rotator 50 and the receiving member 51 are both rotated in the sheet conveying direction K. However, in the example shown in FIG. 5, the receiving member 51 may not be rotated without the gear 56, and the receiving member 51 does not necessarily have a roller shape.
[0043]
Thereby, as shown in FIG. 6B, the sheet material S conveyed through the sheet conveying path (first conveying path 26) sandwiched between the crease projection 52 and the receiving member 51 is creased. Thereafter, the crease rotator 50 and the receiving member 51 are further rotated, and as shown in FIG. 7, the sensor 55 detects the notch 54a of the rotation detection plate 54 and stops when it returns to the home position.
[0044]
As described above, since the crease unit 32 that folds in advance at the position where the fold unit 40 folds is provided upstream of the fold unit 40 in the sheet conveyance direction K, a simple configuration including only the crease unit 32 is provided. Thus, the accuracy of the folding position of the sheet material S can be improved without being affected by the type of the sheet material S and the surrounding environment by making an accurate crease without increasing the size.
[0045]
Further, when the sheet material S is creased by the crease unit 32, the crease rotator 50 is rotated and sandwiched between the crease projection 52 and the receiving member 51, and the sheet conveyance path (first conveyance path 26). ), The sheet material S to be conveyed is creased, so that the sheet material S can be creased while being conveyed, and the productivity can be improved.
[0046]
Furthermore, since both the crease rotator 50 and the receiving member 51 are formed in a roller shape, the sheet material S can be stably conveyed without hindering the conveyance of the sheet material S, and the entire circumferential surface of the receiving member 51 can be elastic. Since the crease projection 52 is pressed against the receiving member 51, the receiving member 51 is deformed, and the alignment between the crease rotary member 50 and the receiving member 51 is not required, and the assemblability can be improved.
[0047]
In the above example, the entire peripheral surface of the roller-shaped receiving member 51 is formed of an elastic material. However, as shown in FIG. 8A, a part of the peripheral surface of the receiving member 51 is made of soft rubber or the like. The elastic member 58 may be provided in the axial direction, and the sheet material S may be creased by being sandwiched between the elastic member 58 and the crease protrusion 52 as shown in FIG.
[0048]
In this way, when the elastic member 58 is damaged, it is only necessary to replace the elastic member 58, the maintenance of the receiving member 51 is made inexpensive, and other than the elastic member 58 of the receiving member 51 is made of a light material such as resin. As a result, the driving cost can be reduced.
[0049]
Further, as shown in FIG. 9, a receiving groove 60 is formed in the axial direction on the peripheral surface of the receiving member 51, and the sheet material S is sandwiched between the receiving groove 60 and the crease projection 52 as shown in FIG. 10. You may make it crease. 9, the same reference numerals as those used in FIG. 5 are used for portions corresponding to those in FIG. If it does in this way, a maintenance cost of receiving member 51 becomes unnecessary without using an elastic member, and driving cost can be reduced by making receiving member 51 with lightweight materials, such as resin.
[0050]
In the above-described example, the crease protrusion 52 is provided only on the crease rotator 50. However, as shown in FIG. 11, the receiving member 51 may also have a crease protrusion 62 in the direction of the rotation axis. Then, for example, a receiving groove 63 is formed in the axial direction on the peripheral surface of the crease rotator 50, and the sheet material S is creased by being sandwiched between the receiving groove 63 and the crease protrusion 62.
[0051]
Of course, an elastic member made of soft rubber or the like is provided in the axial direction in the receiving groove 63 as shown in FIG. 8, and the sheet material S is creased by being sandwiched between the elastic member and the crease projection 62. You may do it.
[0052]
In this way, the sheet material S can be creased from both sides, and Z-folding can be performed with a simple configuration without increasing the size, and the folding position accuracy of the sheet material S can be improved.
[0053]
That is, when Z-folding is performed using the creasing means 32 shown in FIG. 11, the stepping motor is driven after a lapse of T1 time after the carry-in sensor 30 detects the leading edge of the sheet material S, as shown in FIG. Then, the gear 53 and the gear 56 rotate in conjunction with each other, and both the crease rotator 50 and the receiving member 51 rotate in the sheet conveying direction K.
[0054]
2 from the front side to the sheet material S conveyed through the sheet conveying path (first conveying path 26) sandwiched between the creasing protrusion 52 of the creasing rotator 50 and the receiving groove 60 of the receiving member 51. The first crease L1 is made. Next, after further rotating the creasing rotator 50 and the receiving member 51, the sensor 55 detects the second notch 54 b of the rotation detection plate 54 and stands by at the second home position.
[0055]
Then, after T2 time has elapsed since the carry-in sensor 30 detects the leading edge of the sheet material S, the step motor is driven again to rotate the crease rotator 50 and the receiving member 51 in the sheet conveying direction K again. 2 from the back side to the sheet material S conveyed through the sheet conveyance path (first conveyance path 26) sandwiched between the crease projection 62 and the receiving groove 63 of the creasing rotator 50 from the back side. Add L2.
[0056]
Thereafter, the crease rotator 50 and the receiving member 51 are further rotated, and the sensor 55 detects the notch 54a of the rotation detection plate 54 and stops when it returns to the home position.
[0057]
If the punch is supported by the rotating shaft of one of the crease rotator 50 and the receiving member 51 and the punch receiver is provided by supporting the punch by the other rotating shaft, the crease means 32 is provided at the punch punching position. The crease means 32 can be provided with the same drive source without increasing the size when the post-processing apparatus is used in combination with a post-processing apparatus for punching holes. For example, as shown in FIG. 13, the punch 65 is supported by the rotating shaft 50 a of the creasing rotator 50, and the punch receiver 66 is supported by the rotating shaft 51 a of the receiving member 51.
[0058]
When performing the Z-folding by the crease forming means 32 using the apparatus shown in FIG. 13 and making a punch hole, as shown in FIG. 14, after the carry-in sensor 30 detects the leading edge of the sheet material S, T1 After the elapse of time, the step motor 67 is driven to rotate the gear 56 via the motor gear 68, the rotation of the gear 56 is transmitted to rotate the gear 53 in conjunction with each other, and both the creased rotating body 50 and the receiving member 51 are connected. It rotates in the sheet conveying direction K.
[0059]
2 from the front side to the sheet material S conveyed through the sheet conveying path (first conveying path 26) sandwiched between the creasing protrusion 52 of the creasing rotator 50 and the receiving groove 60 of the receiving member 51. The first crease L1 is made. Next, after further rotating the creasing rotator 50 and the receiving member 51, the sensor 55 detects the second notch 54 b of the rotation detection plate 54 and stands by at the second home position.
[0060]
Then, after T2 time has elapsed since the carry-in sensor 30 detects the leading edge of the sheet material S, the stepping motor 67 is driven again to rotate the crease rotator 50 and the receiving member 51 in the sheet conveying direction K again. The sheet material S conveyed through the sheet conveyance path (first conveyance path 26) sandwiched between the crease protrusion 62 of the fold 51 and the receiving groove 63 of the crease rotator 50 is now turned from the back side to the second material shown in FIG. Make a crease L2.
[0061]
Thereafter, after further rotating the creasing rotator 50 and the receiving member 51, the sensor 55 detects the third notch 54c of the rotation detecting plate 54 and stands by at the third home position. Then, after T3 time has elapsed since the carry-in sensor 30 detects the leading edge of the sheet material S, the stepping motor 67 is driven again to rotate the crease rotator 50 and the receiving member 51 in the sheet conveying direction K again. As shown in FIG. 5, punch holes are made in the sheet material S by the punch 65 and the punch receiver 66.
[0062]
Thereafter, the crease rotator 50 and the receiving member 51 are further rotated, and the sensor 55 detects the notch 54a of the rotation detection plate 54 and stops when it returns to the home position.
[0063]
In the above-described example, the crease unit 32 includes the crease rotator 50 and the receiving member 51. However, the crease unit 32 includes the crease slide member 70 and the receiver as shown in FIGS. 16 and 17, for example. It can also be configured with the member 71.
[0064]
In this example, the sheet conveying path 26 is formed by a pair of upper and lower guide plates 72 and 73. The lower guide plate 73 is provided with a fitting groove, and the receiving member 71 is accommodated in the fitting groove. The receiving member 71 may be formed of an elastic material such as rubber, or may be formed of a rigid material by providing a receiving groove into which the tip of the crease slide member 70 fits.
[0065]
The upper guide plate 72 has a groove 72 a facing the receiving member 71. And the front-end | tip of the creasing slide member 70 is put in the slot 72a. The creasing slide member 70 is in the form of a blade and is disposed perpendicular to the sheet conveying path 26. The upper end of the crease slide member 70 is bent at a right angle, and a biasing member 74 such as a coil spring is provided between the bent portion 70a and the upper guide plate 72. Is provided.
[0066]
The crease slide member 70 is urged upward by the urging member 74 so that the bent portion 74 is applied to the cam 75, guided and slid by the support member 76, and is provided so as to freely enter and exit the sheet conveying path 26. When not in operation, the front end of the creasing slide member 70 is retracted from the sheet conveying path 26. Accordingly, the crease slide member 70 is arranged in a direction perpendicular to the sheet conveyance direction K, and the receiving member 71 is arranged on the opposite side of the crease slide member 70 with the sheet conveyance path 26 interposed therebetween.
[0067]
The cam 75 is fixed to the cam shaft 77. A gear 78 is fixed to the cam shaft 77. The gear 78 meshes with the motor gear 79 of the step motor 80.
[0068]
When the crease means 32 is used to crease the sheet material S, the carry-in sensor 30 detects the leading edge of the sheet material S and starts counting the number of pulses. When the time has elapsed, the conveyance of the sheet material S is stopped, the step motor 80 is driven, the cam shaft 77 is rotated through the engagement of the motor gear 79 and the gear 78, and the crease slide member 70 is biased by the cam 75. The sheet member S is guided by the support member 76 against the member 74 and slides downward. The leading end is inserted into the sheet conveying path 26 and sandwiched between the receiving member 71 and the sheet material S is folded in half as shown in FIG. Add.
[0069]
When performing Z-folding, two creasing means 32 are provided along the sheet conveying path (first conveying path) 26, one from the front side of the sheet material S and the other from the back side of the sheet material S. Try to put it on.
[0070]
When such a crease slide member 70 is used, the crease slide member 70 only slides at the installation position, so it is only necessary to accurately control the drive of the motor, and the folding position accuracy of the sheet material S is further improved. Can be improved.
[0071]
【The invention's effect】
As described above, according to the present invention, the crease unit that folds in advance at the position where the fold unit is folded is provided at the upstream position of the fold unit in the sheet conveying direction. Thus, it is possible to provide a sheet folding apparatus that improves the folding position accuracy of the sheet material without being affected by the type of the sheet material and the surrounding environment by making an accurate crease without increasing the size.
[0072]
  AlsoWhen the sheet material is creased by the crease unit, the crease rotator is rotated and sandwiched between the crease protrusion and the receiving member to crease the sheet material. Thus, a sheet folding apparatus with improved productivity can be provided.
[0073]
  furtherSince both the crease rotator and the receiving member are formed in a roller shape, it is possible to provide a sheet folding apparatus that ensures stable conveyance of the sheet material without hindering conveyance of the sheet material.
[0074]
  Claim2According to the invention described in (2), since the entire peripheral surface of the receiving member is formed of an elastic material, the receiving member is deformed when the crease protrusion is pressed against the receiving member, and the creased rotating body and the receiving member are aligned. It is possible to provide a sheet folding apparatus with improved assemblage that is unnecessary.
[0075]
  Claim3According to the invention described in the above, the elastic member is provided in the axial direction on a part of the peripheral surface of the receiving member, and the sheet material is creased by being sandwiched between the elastic member and the crease projection, so that the elastic member Provided is a sheet folding device that requires only replacement of the elastic member when damaged, reduces the maintenance cost of the receiving member, and makes the receiving member other than the elastic member made of a light material such as resin, thereby reducing the driving cost. be able to.
[0076]
  Claim4According to the invention described in the above, the receiving groove is formed in the axial direction on the peripheral surface of the receiving member, and the sheet material is creased by being sandwiched between the receiving groove and the crease projection, so that an elastic member is not used. Maintenance of the receiving member is unnecessary, and the sheet folding device with reduced driving cost can be provided by making the receiving member from a light material such as resin.
[0077]
  Claim5According to the invention described in the above, since the receiving member also has a crease projection in the rotation axis direction, the sheet material can be creased from both sides, and Z-folding is possible without increasing the size with a simple configuration. It is possible to provide a sheet folding apparatus that improves the folding position accuracy of the sheet material.
[0078]
  Claim1According to the invention described inin addition,Since the punch is supported by the rotating shaft of either the crease rotator or the receiving member and the punch receiver is supported by the other rotating shaft, a crease means is provided at the punch hole position to prevent punch punching. When used together with the post-processing apparatus to be used, a sheet folding apparatus provided with a crease means using the same drive source can be provided without increasing the size.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of a sheet folding apparatus according to the present invention in a use state.
FIG. 2 is a diagram illustrating a state where folding is started at a first crease position in the folding means of the sheet folding apparatus.
FIG. 3 is a diagram showing a state of starting folding at a second crease position.
FIG. 4 is a diagram showing a state in which Z-folding is completed.
FIG. 5 is a perspective view showing a crease unit of the sheet folding apparatus.
6A is a view showing the standby state of the crease means as seen from the axial direction, and FIG. 6B is a view showing the crease state as seen from the axial direction.
FIG. 7 is a timing chart of the sheet folding apparatus.
8A is a diagram showing a standby state of another example of the creaser as viewed from the axial direction, and FIG. 8B is a diagram of the crease state as viewed from the axial direction.
FIG. 9 is a perspective view showing still another example of the crease forming means.
FIG. 10 is a diagram showing the crease state as seen from the axial direction.
FIG. 11 is a view showing a crease state of still another example of the crease unit when viewed from the axial direction.
FIG. 12 is a timing chart of the sheet folding apparatus including the crease unit.
FIG. 13 is a diagram showing still another example of the crease forming unit as viewed from the sheet conveying direction.
FIG. 14 is a timing chart of the sheet folding apparatus including the crease unit.
FIG. 15 is a diagram showing the punched state as viewed from the axial direction.
FIG. 16 is a diagram illustrating still another example of the crease forming unit as viewed from a direction orthogonal to the sheet conveying direction.
FIG. 17 is a diagram viewed from the sheet conveying direction.
FIG. 18 is a schematic configuration diagram of a conventional sheet folding apparatus.
[Explanation of symbols]
26 First transport path (sheet transport path)
27 Second transport path (sheet transport path)
28 Third conveyance path (sheet conveyance path)
32 Folding means
40 Folding means
50 Creased rotating body
50a Rotating shaft
51 Receiving member
51a Rotating shaft
52 Crease protrusion
58 Elastic member
60 receiving groove
62 Crease protrusion
63 Receiving groove
65 punches
66 Punch Receiver
70 Folding slide member
71 Receiving member
100 Sheet folding device
101 Carriage
102 outlet
K Sheet conveyance direction
S sheet material
L1 first crease
L2 2nd crease

Claims (5)

In the sheet folding apparatus that folds and discharges the sheet material by the folding means,
A crease unit that creases in advance at a position at which the folding unit folds at an upstream position of the folding unit in the sheet conveying direction ,
The crease means includes a crease rotator having a crease protrusion in the direction of the rotation axis and the rotation axis arranged in a direction perpendicular to the sheet conveyance direction, and sandwiching the sheet conveyance path with respect to the crease rotation body. It is arranged on the opposite side, and is composed of a receiving member that creases the sheet material with being sandwiched between the crease protrusions,
While the crease rotator and the receiving member are both roller-shaped,
A sheet folding apparatus comprising a punch supported by one of the rotating shafts of the creasing rotator and the receiving member and a punch receiver supported by the other rotating shaft . The sheet folding apparatus according to claim 1 , wherein an entire peripheral surface of the receiving member is formed of an elastic material. 2. The sheet material according to claim 1 , wherein an elastic member is provided in an axial direction on a part of the peripheral surface of the receiving member, and the sheet material is folded between the elastic member and the crease protrusion. Sheet folding device. The sheet folding according to claim 1 , wherein a receiving groove is formed in an axial direction on a peripheral surface of the receiving member, and the sheet material is folded between the receiving groove and the crease protrusion. apparatus. The sheet folding apparatus according to claim 1 , wherein the receiving member also has a crease protrusion in a rotation axis direction.

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