JP5928639B1 - Paper processing apparatus and image forming system - Google Patents

Abstract

When a configuration is adopted in which a pressing portion that presses a folded portion is swung, the folded portion is pressed under a predetermined condition regardless of the thickness of the sheet. A sheet processing apparatus includes a first pressing roll 37A that has a facing surface 371 that faces a folded portion of a sheet and presses the folded portion, and is positioned on the opposite side of the facing surface 371 across the folded portion. A second pressing roll 37B that has an opposing surface 371 that faces the folding part and presses the folding part, and the second pressing roll 37B is swung around the second rotation shaft 64 as a center of rotation, so that the first pressing roll 37A is opposed to the second pressing roll 37B. The second pressing roll with respect to the opposing surface 371 of the first pressing roll 37A in accordance with the advancing / retreating portion that advances and retracts the opposing surface 371 of the second pressing roll 37B with respect to the surface 371 and the swinging of the second pressing roll 37B by the advancing and retracting portion. A second gear train 37G2 that changes the direction of the opposing surface 371 of 37B. [Selection] Figure 13

Description

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

  For example, Patent Document 1 discloses a sheet processing apparatus having a pressing unit that presses and folds a folded portion of a folded sheet bundle, and a moving unit that reciprocates the pressing unit in the width direction of the sheet bundle. A sheet processing apparatus is disclosed that includes a guide shaft that supports the pressing means and guides the movement of the pressing means, and a supporting means that supports the pressing means and moves on the structure of the sheet processing apparatus.

JP 2014-136646 A

In the case where the configuration for swinging the opposing portion for pressing the folded portion opposite the folded portion of the sheet, when swung to the opposite part, to tilt the orientation of the facing portion which faces the in fold portion There was a possibility. In this configuration, the swing angle of the facing portion varies depending on the thickness of the paper (folding portion) . For this reason, it is difficult to press the folded portion under predetermined conditions regardless of the thickness of the paper.

The present invention, in the case where the configuration for swinging the opposing portion for pressing the folded portion, and an object thereof is to press the folded portion by a predetermined condition regardless of the thickness of the paper.

The invention of claim 1 includes a first opposing portion opposed to the folded portion of the sheet, rotatably provided around the first axis, positioned on opposition side and sandwiching the folded portion and the first opposing portion a second opposing portion opposed to and the folding unit, to oscillate the previous SL second opposing portion around the second axis, wherein by advance and retreat the previous SL second opposing portion against the first opposing portion a reciprocating unit for pressing the folded portion, the amount of rotation of the swing of the second opposing portion by the forward and reverse part is transmitted to the first axis, defining the orientation of the second opposing portion with respect to the first opposing portion in advance And a changing unit that changes the orientation .
The invention according to claim 2, wherein the second opposing section, 請 Motomeko 1 that having a plurality of opposing surfaces, wherein the surface opposed to the first opposing portion by rotating the first about an axis is changed The sheet processing apparatus according to claim 1.
According to a third aspect of the present invention, there is provided an image forming apparatus that forms an image on a sheet, a folding processing mechanism that performs a folding process for forming a folded portion on the sheet on which an image is formed by the image forming apparatus, and the folding unit. a first opposing portion opposed to a second opposing portion facing the first axial center and rotatably provided on the folding portion located in said first opposing portion and the opposition side sandwiching the folded portion, An advancing / retreating part that swings the second opposing part around the second axis, advances and retracts the second opposing part relative to the first opposing part and presses the folding part, and the second opposing part by the advancing / retreating part the amount of rotation of the oscillating parts is transmitted to the first shaft, an image forming system comprising a sheet processing apparatus, a and a maintaining unit for maintaining the orientation of said second opposing portion with respect to said first opposing portion.

According to the invention of claim 1 and 3, in the case where the configuration for swinging the opposing portion for pressing the folded portion, it is possible to press the folded portion by a predetermined condition regardless of the thickness of the sheet .
According to the invention 請 Motomeko 2, it is possible to press the folded portion by using a plurality of opposing surfaces.

1 is an overall view of an image forming system according to an exemplary embodiment. It is explanatory drawing of the post-processing apparatus of this embodiment. It is explanatory drawing of the saddle stitch bookbinding function part of this embodiment. It is explanatory drawing of a structure around a folding processing mechanism. It is a whole perspective view of the press roll part of this embodiment. It is an expanded view of the outer peripheral surface of a 1st press roll. (A)-(D) are the figures explaining the press process of the folding part by a press roll part. (A) And (B) is a figure explaining the press process of the folding part by a press roll part. It is explanatory drawing of the mechanism which implement | achieves the rocking | fluctuation operation | movement and press operation | movement of a press roll part. (A) And (B) is explanatory drawing of the press operation | movement of a press roll part. It is explanatory drawing of the press operation | movement of a press roll part. (A) And (B) is explanatory drawing of the retraction | saving operation | movement of a press roll part. It is explanatory drawing explaining the structure of a 2nd gear train. It is explanatory drawing explaining the effect | action of a 2nd gear train.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.
FIG. 1 is an overall view of an image forming system 100 of the present embodiment.
As shown in FIG. 1, the image forming system 100 includes an image forming apparatus 1 such as a printer or a copier that forms a color image by, for example, electrophotography, and a sheet S on which an image is formed by the image forming apparatus 1. And a post-processing device 2 that performs post-processing.

  In the present embodiment, the front and back directions of the image forming system 100 shown in FIG. Further, the description will be made assuming that the upper and lower directions of the image forming system 100 shown in FIG. Further, the left and right directions of the image forming system 100 will be described as the left-right direction H.

  The image forming apparatus 1 includes an image forming unit 10 that forms an image based on each color image data, an image reading unit 11 that reads an image from a document and generates read image data, and a sheet that supplies the sheet S to the image forming unit 10. A supply unit 12, a general user interface 13 that receives an operation input from the user and presents information to the user, and a main control unit 14 that controls the operation of the entire image forming system 100 are provided.

  The post-processing device 2 receives a transport unit 3 that receives and conveys the sheet S on which an image is formed from the image forming apparatus 1, and a folding unit 4 that performs a folding process on the sheet S that is carried in from the transport unit 3 (folding). An example of a processing mechanism), a finisher unit 5 (an example of a paper processing apparatus) that performs final processing on the paper S that has passed through the folding unit 4, and an interposer 6 that supplies slip sheets used as a cover of a booklet or the like. I have. Further, the post-processing device 2 includes a paper processing control unit 7 that controls each functional unit of the post-processing device 2.

  In the present embodiment, the configuration example in which the sheet processing control unit 7 is provided in the post-processing apparatus 2 has been described, but the sheet processing control unit 7 may be provided in the image forming apparatus 1. Further, the main control unit 14 may be configured to have the control function of the paper processing control unit 7.

FIG. 2 is an explanatory diagram of the post-processing device 2 of the present embodiment.
The post-processing device 2 includes a finisher unit 5. Then, the finisher unit 5 generates a movement of a bundle of sheets by accumulating a necessary number of sheets S and a punch function unit 70 for punching (punching) 2 holes or 4 holes on the sheet S. An end binding function unit 40 that performs staple binding (end binding) is provided at the end of the bundle.

Further, the post-processing device 2 accumulates a required number of sheets S to generate a sheet bundle B (see FIG. 4 described later), and performs a binding process (saddle stitching process) on the central portion of the sheet bundle B. A saddle stitch bookbinding function unit 30 for generating a booklet (performing bookbinding) is provided.
The folding unit 4 of the post-processing apparatus 2 includes a folding function unit 50 that performs folding such as inner trifold (C-fold) and outer trifold (Z-fold) on the paper S.

<Configuration of Saddle Stitch Binding Function Unit 30>
FIG. 3 is an explanatory diagram of the saddle stitching function unit 30 of the present embodiment.
FIG. 4 is an explanatory diagram of a configuration around the folding processing mechanism 35.
The saddle stitching function unit 30 is formed in a plate shape, and a compiling member 31 that accumulates a predetermined number of sheets S after image formation to form a sheet bundle, and one sheet S on the compiling member 31. A carry-in roll 39 for carrying in each piece and an end guide 32 for supporting the sheet bundle on the compiling member 31 from below are provided. Further, the end guide 32 can be moved along the compiling member 31.

  Further, the saddle stitch bookbinding function unit 30 urges the sheet S accumulated on the compiling member 31 toward the end guide 32 and aligns the end of the sheet S, and the compiling member 31. A sheet width aligning member 34 that aligns the sheets S in the width direction of the stacked sheets S, and a stapler 82 that performs a binding process by passing a staple needle (not shown) through the bundle of sheets on the compiling member 31; It has.

  Further, the saddle stitch bookbinding function unit 30 includes a folding processing mechanism 35 that performs a folding process on the sheet bundle that has been subjected to the binding process. The folding processing mechanism 35 includes a folding knife 35a and an advancing mechanism 35b that includes a motor or the like and advances the folding knife 35a from the back surface side of the compiling member 31 toward the accommodation surface side.

  Further, the saddle stitching function unit 30 presses the folding roll 36 having a pair of rolls that sandwich the paper bundle B that has been folded by the folding knife 35a, and the folded portion of the paper bundle B that has passed through the sandwiching roll 36. The pressing roll unit 37, the sheet placing unit 45 on the downstream side of the pressing roll unit 37 on which the booklet bundled paper bundle B is placed, and the sheet carried into the compiling member 31 by the carry-in roll 39. A paper sensor 92 for detecting S is provided.

  As shown in FIG. 4, the sandwiching roll 36 conveys the sheet bundle B and positions the folded portion of the sheet bundle B at a pressing portion 37 </ b> U that is a portion that presses the folded portion of the pressing roll unit 37. Therefore, in the present embodiment, the distance between the sandwiching roll 36 and the pressing roll unit 37 is set to be at least smaller than the width of the sheet bundle B (width in the transport direction). In the present embodiment, the sandwiching roll 36 feeds the folded portion of the sheet bundle B (the downstream end in the conveyance direction of the sheet bundle B) by a predetermined amount to the downstream side with respect to the pressing location 37U. It has come to include.

And the press roll part 37 of this embodiment is provided in the downstream of the pinching roll 36, as shown in FIG.
In the saddle stitching function unit 30 of the present embodiment, a conveyance member such as a dedicated conveyance roll for pulling out the sheet bundle B from the pressing roll unit 37 is not provided on the downstream side of the pressing roll unit 37. That is, a special transport member for transporting the sheet bundle B is not provided on the movement path of the sheet bundle B between the pressing roll unit 37 and the sheet placing unit 45.

  The sheet placement unit 45 is provided below the pressing roll unit 37. Note that the paper placement unit 45 may be provided at a position directly below the vertical direction V of the pressing roll unit 37 or at a position away from the position just below by a predetermined distance in the left-right direction H. Note that a position that is a predetermined distance away from the position immediately below in the left-right direction H moves the position of at least one of the first pressing roll 37A and the second pressing roll 37B of the pressing roll unit 37 as will be described later. It suffices if it is set within a range in which at least a part of the sheet bundle B can be contacted when the bundle B drops or moves downward.

  Further, the sheet placement unit 45 includes a conveyance belt 451. Then, the sheet placing unit 45 conveys the sheet bundle subjected to the process of pressing the folded portion by the pressing roll unit 37 to a predetermined position. For example, when the pressing roll unit 37 is disposed relatively outside in the apparatus, or when the sheet placing unit 45 is inclined from the inside of the apparatus toward the outside of the apparatus, and the sheet bundle B slides and moves by its own weight. The conveyor belt 451 is not an essential component.

[Configuration around the folding mechanism 35]
In the present embodiment, as shown in FIG. 4, a folding processing mechanism 35 that performs a folding process on the sheet bundle B subjected to the binding process is provided. The folding processing mechanism 35 includes a folding knife 35 a and an advance mechanism 35 b that advances the folding knife 35 a toward the sheet bundle B.

Here, in this embodiment, the folding knife 35a advances to a position where the tip of the folding knife 35a reaches the sandwiching roll 36. As a result, a fold is formed in the sheet bundle B, and this fold (folded portion) is pressed from both sides by the sandwiching roll 36.
The folding knife 35a is positioned behind the compiling member 31 in the sheet stacking stage on the compiling member 31, the saddle stitching stage using the stapler 82 (see FIG. 3), and the sheet transport stage after the saddle stitching. . Thereby, interference with the paper S and the folding knife 35a is prevented.

[Overall configuration of the pressing roll unit 37]
FIG. 5 is an overall perspective view of the pressing roll portion 37 of the present embodiment.
The pressing roll unit 37 is a pair of rolls that press the folded portion of the sheet bundle B, and includes a first pressing roll 37A (an example of a first pressing unit) and a second pressing roll 37B (an example of a second pressing unit). It has.
And the press roll part 37 of this embodiment is "rotation operation | movement" which rotates the 1st press roll 37A and the 2nd press roll 37B centering on each rotating shaft in order to press the folding part of the paper bundle B. In this embodiment, a “swinging operation” that swings (swings) the second pressing roll 37B around the rotation axis, and the folded portion of the sheet bundle B is pressed by the second pressing roll 37B and the first pressing roll 37A. A “pressing operation” and a “retracting operation” in which at least one position of the first pressing roll 37A and the second pressing roll 37B is moved to retract from the pressing portion 37U are performed.

First, a mechanism for realizing the “rotating operation” of the first pressing roll 37 </ b> A and the second pressing roll 37 </ b> B and a pressing process for the folded portion of the sheet bundle B by the “rotating operation” and the “pressing operation” will be specifically described.
A mechanism that realizes the “swinging operation”, “pressing operation”, and “retracting operation” will be described later.

[Mechanism for realizing “rotation operation” of the pressing roll unit 37]
As illustrated in FIG. 5, the pressing roll unit 37 includes a first drive motor 37M1, a first gear train 37G1 connected to the first drive motor 37M1, and a second gear train 37G2 (an example of a change unit). ing.

The first pressing roll 37A and the second pressing roll 37B are provided with the axial direction extending along the front-rear direction D, respectively. The first pressing roll 37A is provided to be rotatable about the first pressing rotation shaft 37S1. Furthermore, the first pressing rotary shaft 37S1 is rotatably supported by a support member (not shown) fixed to the apparatus main body.
The second pressing roll 37B is provided to be rotatable about the second pressing rotation shaft 37S2. The second pressing rotation shaft 37S2 is rotatably supported by a pressing support member 68 described later.

The first gear train 37G1 is provided on one side in the axial direction of the first pressing rotation shaft 37S1. The first gear train 37G1 is connected to the first pressing rotation shaft 37S1 and the second pressing rotation shaft 37S2.
The second gear train 37G2 is provided on the other side in the axial direction of the first pressing rotation shaft 37S1. The second gear train 37G2 is connected to the first pressing rotation shaft 37S1 and the second pressing rotation shaft 37S2.

The first drive motor 37M1 rotates the first pressing rotation shaft 37S1 and the second pressing rotation shaft 37S2 via the first gear train 37G1. In the present embodiment, the second gear train 37G2 is connected to the first pressing rotation shaft 37S1 and the second pressing rotation shaft 37S2 on the other side in the axial direction. Accordingly, the first pressing rotation shaft 37S1 and the second pressing rotation shaft 37S2 of the present embodiment receive rotational force in synchronization in both axial directions.
The detailed contents of the rotation operation of the pressing roll unit 37 by the second gear train 37G2 and the first gear train 37G1 will be described later.

(Configuration of the first pressing roll 37A)
The first pressing roll 37A has a hexagonal cross-sectional shape. Further, the first pressing roll 37 </ b> A has a facing surface 371 (an example of a facing portion) that faces the folded portion of the sheet bundle B. Further, in the present embodiment, a convex portion 37E is formed on the facing surface 371.
The first pressing roll 37 </ b> A is formed such that the axial length is longer than the length of the folded portion of the sheet bundle B. That is, the first pressing roll 37 </ b> A is formed so as to extend over the entire folding portion of the sheet bundle B.

Furthermore, in this embodiment, as shown in FIG. 4, the first pressing roll 37 </ b> A is configured such that the facing surface 371 is switched by rotation. More specifically, in the present embodiment, since the cross-sectional shape of the first pressing roll 37A is a hexagon, six opposing surfaces 371 to 376 (hereinafter, “first opposing surface 371 to sixth opposing surface 376”). Further, a convex portion 37E is formed on each opposing surface.
In the following description, the first facing surface 371 to the sixth facing surface 376 are collectively referred to as “facing surface 371” unless otherwise distinguished.

  The second pressing roll 37B is configured similarly to the first pressing roll 37A. That is, the second pressing roll 37 </ b> B has a hexagonal cross section and includes six opposing surfaces 371 (first opposing surface 371 to sixth opposing surface 376). Furthermore, the convex part 37E is formed in each of the six opposing surfaces of the 2nd press roll 37B. And the 2nd press roll 37B of this embodiment is arrange | positioned in the up-down direction V below the 1st press roll 37A. Further, the second pressing roll 37 </ b> B is formed such that the length in the axial direction is longer than the length of the folded portion of the sheet bundle B. That is, the second pressing roll 37B is formed so as to extend over the entire folding portion of the sheet bundle B.

Further, as shown in FIG. 5, the second pressing roll 37B is disposed substantially parallel to the first pressing roll 37A. And the 2nd press roll 37B rotates centering around the rotating shaft along the axial direction of the 1st press roll 37A, and also rotates in the reverse direction to 37 A of 1st press rolls.
The second pressing roll 37B sandwiches the folded portion of the sheet bundle B and is positioned on the opposite side to the first pressing roll 37A, and performs a pressing process on the folded portion.

FIG. 6 is a development view of the outer peripheral surface of the first pressing roll 37A.
As described above, in the present embodiment, the first facing surface 371 to the sixth facing surface 376 are provided, and in the developed view shown in FIG. 6, the first facing surface 371 to the sixth facing surface 376 are arranged vertically. .
Each of the first opposing surface 371 to the sixth opposing surface 376 is provided with a plurality of convex portions 37E. And the arrangement position of the convex part 37E in the axial direction of 37 A of 1st press rolls differs for every opposing surface. In the present embodiment, when all the convex portions 37E formed on the first facing surface 371 to the sixth facing surface 376 are arranged in a line so as to shift the arrangement position in the axial direction, they are arranged without gaps in the axial direction. It is configured as follows. The convex portions 37E arranged in a line correspond to the folded portions of the sheet bundle B.

[Pressing process of the pressing roll unit 37]
FIGS. 7A to 7D, 8 </ b> A, and 8 </ b> B are diagrams illustrating the pressing process of the folded portion by the pressing roll unit 37.
7 and FIG. 8 also show the state when the pressing roll portion 37 and the sheet bundle B are viewed from the arrow VI in FIG.

  Here, in this embodiment, when the sheet bundle B is conveyed to the pressing roll unit 37 by the sandwiching roll 36 (see FIG. 3) and the folded portion of the sheet bundle B reaches the pressing roll unit 37, the sheet bundle B is sandwiched. The conveyance of the sheet bundle B by the roll 36 is temporarily stopped. At this time, as shown to FIG. 7 (A), in the press roll part 37, 1st press roll 37A and 2nd press roll 37B are spaced apart.

Next, in the present embodiment, as shown in FIG. 7B, the first pressing roll 37A and the second pressing roll 37B relatively approach toward the folding portion, and the first pressing roll 37A and the second pressing roll 37B The folded portion is pressed by the pressing roll 37B. That is, the folding part is pressed by the operation of the first pressing roll 37A and the second pressing roll 37B relatively approaching each other.
More specifically, a convex portion 37E provided on the first opposing surface 371 of the first pressing roll 37A and a convex portion 37E as the other convex portion provided on the first opposing surface 371 of the second pressing roll 37B. As a result, the folded portion is sandwiched. And a folding part is pressed by these two convex parts 37E. Thus, the sheet bundle B is crushed so as to reduce the swelling of the sheet bundle B at the folded portion.

  Next, in this embodiment, as shown in FIG. 7C, the first pressing roll 37A and the second pressing roll 37B are retracted from the folded portion, and the first pressing roll 37A and the second pressing roll 37B are 1 / 6 turn. Thereby, the 2nd opposing surface 372 provided in each of the 1st press roll 37A and the 2nd press roll 37B opposes a folding part.

Thereafter, as shown in FIG. 7D, the folded portion is pressed by the first pressing roll 37A and the second pressing roll 37B again. More specifically, the folded portion is pressed by the convex portions 37E provided on the second opposing surface 372 of the first pressing roll 37A and the second opposing surface 372 of the second pressing roll 37B.
Here, in this embodiment, the convex part 37E provided in the 2nd opposing surface 372 and the convex part 37E provided in the 1st opposing surface 371 are the press roll part 37, as shown in FIG. Therefore, the pressing by the second facing surface 372 causes a position different from the pressing by the first facing surface 371 to be pressed.

  Thereafter, in the present embodiment, these operations are repeated. That is, pressing by the convex portion 37E, separation from the first pressing roll 37A and the second pressing roll 37B from the folding portion, rotation of the first pressing roll 37A and the second pressing roll 37B, and the first pressing roll 37A to the folding portion. And advancement of the 2nd press roll 37B is performed repeatedly.

FIG. 8A shows the final stage of the pressing process by the first pressing roll 37A and the second pressing roll 37B. Specifically, it is a diagram showing a state when the folded portion is pressed by the sixth facing surface 376.
In the pressing by the sixth facing surface 376 (the convex portion 37E provided on the surface), the portion indicated by reference numeral 8A in FIG. 8A is pressed, and thereby the pressing process is performed on the entire area in the longitudinal direction of the folded portion. It becomes a state.

Thereafter, in the present embodiment, as shown in FIG. 8B, the second pressing roll 37B moves relative to the first pressing roll 37A. Then, the second pressing roll 37B moves so as to open the lower side of the sheet bundle B. Thus, after the second pressing roll 37B presses the folded portion of the sheet bundle B, the second pressing roll 37B moves to a position that does not interfere with the conveyance of the sheet bundle B. As a result, the sheet bundle B is dropped and moved by its own weight and is placed on the sheet placing portion 45.
In addition, rotation of the 1st press roll 37A and the 2nd press roll 37B is performed, and the 1st opposing surface 371 opposes mutually. As a result, the pressing process for the next new sheet bundle B can be started.

  Here, in the configuration of the present embodiment, the swelling of the sheet bundle B can be suppressed while suppressing the increase in size of the apparatus. Here, the swelling of the sheet bundle B can be suppressed, for example, by sandwiching the folded portion from both sides of the sheet bundle B on the outer peripheral surface of the cylindrical roll member. By the way, in this case, since the folded portion is pressed in a wide area along the longitudinal direction of the roll member (because the folded portion is pressed at the planar portion and the pressing area becomes large), the pressing per unit area The load tends to decrease.

In order to suppress the decrease in the pressing load, for example, it is necessary to increase the spring load for pressing, and in such a case, it is necessary to increase the strength of the frame and the like, and the apparatus is likely to be enlarged.
On the other hand, in the configuration of the present embodiment, since the sheet bundle B is pressed using the convex portion 37E, the pressing load can be concentrated on a specific portion of the folded portion, and even if the spring load is small, the folded portion It becomes possible to press. In this case, the frame having strength can be omitted.
Furthermore, in the configuration of the present embodiment, the swelling of the sheet bundle B can be suppressed while suppressing the occurrence of folding wrinkles that occur in the folded portion of the sheet bundle B. Here, the swollenness of the sheet bundle B can be suppressed, for example, by being sandwiched between folding rollers that further fold the folded portion. By the way, in this case, the fold increase roller moves along the fold portion while concentrating and pressing a very narrow region of the fold portion, and suddenly crushes the fold portion. Folding is likely to occur at the folded portion of the sheet bundle B.

In order to suppress the generation of the folding wrinkles, for example, it is necessary to reduce the deformation of the sheet bundle B at the time of pressing, and in such a case, it is necessary to reduce the spring load for pressing, The effect of suppressing swelling is likely to decrease.
On the other hand, in the configuration of the present embodiment, the pressing load may be concentrated on a specific portion of the folded portion in order to suppress the swelling of the sheet bundle B to a certain degree from directly above, while applying no load even at a place other than the convex portion 37E. The occurrence of folding wrinkles occurring at the folded portion is suppressed. In this case, the load increases as long as the strength of the frame or roll allows.

In addition, as in the present embodiment, when the protrusions 37E having different positions are advanced to the folded portion, a plurality of members each having the convex portions 37E are prepared, and the members are sequentially advanced to the folded portions. The structure to make it possible is also considered. By the way, in this case, a mechanism for sequentially replacing the members is required, and the apparatus is likely to be complicated and large.
On the other hand, in the configuration of the present embodiment, by simply rotating and advancing the pressing roll portion 37, the convex portions 37E having different positions can be advanced to the folded portion, and a plurality of members are sequentially advanced as described above. The number of parts can be reduced as compared with the case of making them. Furthermore, compared with the case where a plurality of members are advanced sequentially, the complexity of the apparatus is suppressed and the apparatus can be reduced in size.

[Mechanism for realizing “swinging operation” and “pressing operation” of the pressing roll unit 37]
Next, a mechanism for realizing the swinging operation and the pressing operation of the pressing roll unit 37 will be described in detail.
FIG. 9 is an explanatory diagram of a mechanism that realizes the swinging and pressing operations of the pressing roll unit 37.
As shown in FIG. 9, the pressing roll unit 37 includes a first rotating shaft 61, a first gear 62 supported by the first rotating shaft 61, a cam 63 supported by the first rotating shaft 61, and a second The rotary shaft 64, the second gear 65 connected to the first gear 62, the paper holding portion 66, the paper bundle holding arm 67 supported by the second rotary shaft 64, and the pressure supported by the second rotary shaft 64 A support member 68 (an example of an advance / retreat part), a pressing arm 69 (an example of an advance / retreat part) rotatably supported by the second rotation shaft 64, and a second drive motor 37M2 (FIG. 5) that drives the first rotation shaft 61. Reference, an example of a drive unit). The pressing roll unit 37 includes a first torsion spring 671 and a second torsion spring 681.

  In the pressing roll portion 37 of the present embodiment, for example, the first gear 62, the cam 63, the second rotating shaft 64, the second gear 65, and the paper are respectively provided on one and the other of the first pressing roll 37A in the axial direction. A bundle holding arm 67, a pressing support member 68, and a pressing arm 69 are provided (see FIG. 5).

In the present embodiment, the first rotating shaft 61 is provided so as to extend along the axial direction of the first pressing rotating shaft 37S1 (see FIG. 5). The first rotating shaft 61 is rotatably supported by a support member (not shown) fixed to the apparatus main body.
The first gear 62 is fixed to the first rotating shaft 61. The first gear 62 is connected to the second drive motor 37M2 and the second gear 65, respectively.

  The cam 63 is formed in a fan shape and is fixed to the first rotating shaft 61. The cam 63 rotates together with the first rotation shaft 61. The cam 63 has a cam surface 631 that contacts a receiving portion 691 of the pressing arm 69 described later. And the cam surface 631 contacts the receiving part 691 mentioned later because the cam 63 becomes a predetermined rotation angle. In the present embodiment, as will be described later, when the cam 63 contacts the pressing arm 69, the pressing force in the direction in which the second pressing roll 37 </ b> B approaches the first pressing roll 37 </ b> A is applied to the pressing arm 69.

  The 2nd rotating shaft 64 is provided in the edge part of the axial direction of 37 A of 1st press rolls. The second rotating shaft 64 is fixed to a support member (not shown) fixed to the apparatus main body. As described above, the second rotating shaft 64 is disposed on one side and the other side of the first pressing roll 37A in the axial direction. Thus, in this embodiment, the 2nd rotating shaft 64 is not formed over the front-back direction D of the press roll part 37, but the center part in the front-back direction D of the press roll part 37 is opened. Accordingly, in the present embodiment, the second rotation shaft 64 disposed below the sheet bundle B does not hinder the movement of the sheet bundle B.

  Moreover, in this embodiment, the 2nd rotating shaft 64 is arrange | positioned rather than the opposing surface 371 (convex part 37E) of 37 A of 1st press rolls. More specifically, as shown in FIG. 9, the second rotation shaft 64 is arranged such that the height V2 of the second rotation shaft 64 is positioned below the height V1 of the first holding portion 661 described later of the sheet holding portion 66. ing. In the present embodiment, when the thickness of the sheet bundle B sandwiched between the first pressing roll 37A and the second pressing roll 37B is the maximum thickness set in advance, the folded portion is pressed by a strong pressing force. I can crush it.

  The second gear 65 is rotatably supported on the second rotation shaft 64. The second gear 65 has an arcuate groove 651. Furthermore, the arc-shaped groove 651 has an end 651e in the circumferential direction. The second gear 65 is connected to the first gear 62.

  The sheet holding portion 66 is provided extending along the axial direction of the first pressing rotation shaft 37S1 (see FIG. 5). The sheet holding unit 66 is supported by a support member (not shown) that supports the first pressing rotation shaft 37S1. The sheet holding unit 66 includes a first holding unit 661 facing the upper side of the sheet bundle B. The first holding unit 661 holds the sheet bundle B at a location different from the folded portion of the sheet bundle B when the folding process is performed by the first pressing roll 37A and the second pressing roll 37B.

  The sheet bundle holding arm 67 is connected to the pressing support member 68 via the first torsion spring 671. The sheet bundle holding arm 67 has a second holding portion 672 that faces the lower side of the sheet bundle B. Further, the second holding portion 672 is provided at a position that can face the first holding portion 661. The second holding unit 672 holds the sheet bundle B at a location different from the folded portion of the sheet bundle B when the folding process is performed by the first pressing roll 37A and the second pressing roll 37B. .

The pressing support member 68 is connected to the sheet bundle holding arm 67 via the first torsion spring 671 as described above. Further, the pressing support member 68 is connected to the pressing arm 69 via a spring 692. And the press support member 68 has the support part 682 which supports 2nd press rotating shaft 37S2. And the press support member 68 rotates the 2nd press roll 37B whole by making the 2nd rotating shaft 64 into a rotation center. In the present embodiment, the pressing support member 68 is on the opposite side of the opposing position across the second rotating shaft 64 from the opposing position where the second pressing roll 37B faces the first pressing roll 37A. Rotate approximately 150 degrees to the retracted position.
Further, the radius of rotation of the second pressing roll 37B by the pressing support member 68 is set to be shorter than the distance between the sheet placing portion 45 and the second rotating shaft 64 (see FIG. 8).

  The pressing arm 69 is rotatably supported on the second rotating shaft 64. In addition, as described above, the pressing arm 69 is connected to the pressing support member 68 via the spring 692. The pressing arm 69 includes a receiving portion 691 with which the cam surface 631 of the cam 63 contacts, a spring 692, and a protruding portion 693 that faces the arcuate groove 651 of the second gear 65.

The receiving portion 691 is disposed on the opposite side of the spring 692 with the second rotating shaft 64 interposed therebetween. That is, the pressing arm 69 forms a relationship in which the second rotation shaft 64 is a fulcrum and the action point is the spring 692 and the force point is the receiving portion 691.
One of the springs 692 in the expansion / contraction direction is fixed to the pressing arm 69 and the other side is fixed to the pressing support member 68.
The protrusion 693 protrudes in the front-rear direction D. The protrusion 693 is fitted into the arc-shaped groove 651 and relatively moves along the arc-shaped groove 651 until it contacts the end 651e.

  In the second torsion spring 681, one end of the spring is fixed to the second gear 65, and the other end of the spring is hooked on the protrusion 693 of the pressing arm 69. That is, the pressing arm 69 is connected to the second gear 65 through the second torsion spring 681.

[Explanation of “swinging operation” and “pressing operation” of the pressing roll unit 37]
Next, the swinging operation and pressing operation of the pressing roll unit 37 will be described.
FIG. 10A, FIG. 10B, and FIG. 11 are explanatory diagrams of the swinging and pressing operations of the pressing roll unit 37. FIG.
As shown in FIG. 10A, the folded portion of the sheet bundle B is opposed to the first holding portion 661 of the sheet holding portion 66 and the facing surface 371 of the first pressing roll 37A by the sandwiching roll 36 (see FIG. 4). Placed in position.
Then, the first gear 62 is rotated counterclockwise in FIG. 10 and the second gear 65 is rotated clockwise in FIG. 10 by the second drive motor 37M2 (see FIG. 5). Then, the second gear 65 rotates the pressing arm 69 clockwise through the second torsion spring 681 in FIG. Then, the pressing arm 69 rotates the pressing support member 68 clockwise through the spring 692 in FIG. Further, the pressing support member 68 causes the sheet bundle holding arm 67 to swing clockwise in FIG. 10 via the first torsion spring 671. Accordingly, in the present embodiment, first, the second holding portion 672 of the sheet bundle holding arm 67 contacts the sheet bundle B. The sheet bundle B is held between the first holding unit 661 and the second holding unit 672.

  Thereafter, as shown in FIG. 10B, the first gear 62 is further rotated counterclockwise in FIG. Then, the pressing support member 68 further swings the second pressing roll 37B toward the first pressing roll 37A. As a result, the facing surface 371 of the second pressing roll 37B faces the folded portion of the sheet bundle B. That is, the folded portion of the sheet bundle B is sandwiched between the facing surface 371 of the first pressing roll 37A and the facing surface 371 of the second pressing roll 37B.

  Then, as shown in FIG. 11, the first gear 62 is further rotated counterclockwise in FIG. Then, the cam surface 631 of the cam 63 pushes the receiving portion 691 of the pressing arm 69. As a result, the pressing arm 69 feeds the pressing support member 68 through the spring 692. And the press by the 2nd press roll 37B with respect to the folding part of the sheet bundle B is performed.

Further, after the pressing roll portion 37 sandwiches the folded portion, the movement of the pressing arm 69 is restrained. However, the second gear 65 can continue to rotate as the second torsion spring 681 is twisted. As a result, the first rotation shaft 61 can also continue to rotate. Therefore, the cam 63 can be operated to push the receiving portion 691 by continuing to rotate. In this embodiment, with this structure, realization of a strong pressing force can be performed by cam driving without using gear transmission, for example. In the present embodiment, for example, strong pressing is realized without using a large and sturdy gear.
Note that the spring force generated by the twist of the first torsion spring 671 acts to further strengthen the holding force of the sheet bundle B by the sheet bundle holding arm 67.

Here, in the present embodiment, as described above, the second gear 65 is rotated to swing the pressing support member 68 (the pressing arm 69), and then the cam 63 is driven to move the second pressing roll 37B to the first. It pushes toward the pressing roll 37A.
In this way, the swinging operation of the second pressing roll 37B is realized mainly by the second gear 65, so that the moving speed becomes relatively fast. On the other hand, the pressing operation by the second pressing roll 37 </ b> B is mainly realized by the cam 63, and for example, while suppressing damage to the “gear member” such as the second gear 65, the folding portion is pressed by a relatively strong pressing force. I try to press it. In the present embodiment, a state where priority is given to the moving speed and a state where priority is given to the pressing force are formed by switching the driving of the second gear 65 and the cam 63.

  In the present embodiment, the configuration of the apparatus is simplified by adopting a configuration in which the second gear 65 and the cam 63 are driven by a single second drive motor 37M2. Further, in the present embodiment, as shown in FIG. 5, the second drive motor 37M2 is placed on the upper side with respect to the second rotation shaft 64 (opposite to the region where the press support member 68, the second press roll 37B, etc. swing). The device is downsized by arranging it on the side).

  In addition, in this embodiment, although the contact location of the cam 63 with respect to the press arm 69 is an opposite side to the side in which the 2nd press roll 37B is provided on both sides of the 2nd rotating shaft 64, it is not limited to this. For example, the cam 63 may be brought into contact with the second pressing roll 37 </ b> B side of the pressing arm 69. In addition to the second drive motor 37M2, a drive motor for driving the cam 63 may be provided separately.

[Description of “Retraction Operation” of Pressing Roll Section 37]
Next, the “retraction operation” of the pressing roll unit 37 will be described.
12A and 12B are explanatory diagrams of the retreat operation of the pressing roll unit 37. FIG.
As shown in FIG. 12A, the first gear 62 is rotated clockwise in FIG. 12 by the second drive motor 37M2 (see FIG. 5). Then, the second gear 65 rotates the pressing arm 69 counterclockwise in FIG. Further, the end 651 e of the arc-shaped groove 651 of the second gear 65 contacts the protrusion 693 of the pressing arm 69.

After that, as shown in FIG. 12B, the pressing arm 69 rotates through the protrusion 693 that engages the arcuate groove 651 of the second gear 65 as the second gear 65 rotates. Then, as the pressing arm 69 rotates, the sheet bundle holding arm 67 and the pressing support member 68 rotate. As a result, the second pressing roll 37B moves to the opposite side of the first pressing roll 37A across the second rotating shaft 64. Thus, in the press roll part 37 of this embodiment, the position of the 2nd press roll 37B is rock | fluctuated by setting the 2nd rotating shaft 64 as a rotation center, and mainly using the press support member 68 as a rotating arm. Then, the second pressing roll 37B swings and opens the lower side of the sheet bundle B, so that the sheet bundle B falls and moves to the sheet placement portion 45 (see FIG. 3) by its own weight.
In the present embodiment, the second pressing roll 37B supported by the pressing support member 68 having a certain length is swung around the second rotating shaft 64 as a center of rotation. It will be evacuated greatly so as not to become.

  As described above, in the present exemplary embodiment, the sheet bundle B that has been subjected to the process of pressing the folded portion downstream of the pressing roll unit 37 in the conveying direction of the sheet bundle B by the sandwiching roll 36 is dedicated. There is no need to provide a transfer member. Therefore, in the post-processing apparatus 2 of the present embodiment, the number of parts is reduced.

[Configuration and operation of second gear train 37G2]
FIG. 13 is an explanatory diagram illustrating the structure of the second gear train 37G2.
FIG. 14 is an explanatory diagram for explaining the operation of the second gear train 37G2.
Next, the configuration and operation of the second gear train 37G2 will be described in detail.
The basic configuration of the first gear train 37G1 (see FIG. 5) is the same as that of the second gear train 37G2. Here, the second gear train 37G2 will be described as an example, and the details of the first gear train 37G1 will be described. The detailed explanation is omitted.

  As shown in FIG. 13, the second gear train 37G2 includes a first rotation gear 381 fixed to the first pressing rotation shaft 37S1, a second rotation gear 382 connected to the first rotation gear 381, and a second rotation gear. A third rotation gear 383 connected to 382, a fourth rotation gear 384 connected to the third gear, a fifth rotation gear 385 connected to the fourth rotation gear 384, and a sixth rotation connected to the fifth rotation gear 385. And a gear 386.

The first rotation gear 381, the second rotation gear 382, and the third rotation gear 383 are rotatably supported by support members (not shown). Therefore, in this embodiment, although the 1st rotation gear 381, the 2nd rotation gear 382, and the 3rd rotation gear 383 rotate centering around a rotating shaft, the position of the rotating shaft does not change.
The fourth rotation gear 384 is rotatably supported by the second rotation shaft 64 with the second rotation shaft 64 and the rotation shaft in common. The fifth rotation gear 385 is rotatably supported by a support shaft 68S fixed to the pressing support member 68. The sixth rotation gear 386 is fixed to the second pressing rotation shaft 37S2 with the second pressing rotation shaft 37S2 and the rotation shaft in common.

  In this embodiment, the first rotation gear 381, the second rotation gear 382, the third rotation gear 383, the fourth rotation gear 384, the fifth rotation gear 385, and the sixth rotation gear 386 are set to a gear ratio of 1. Has been.

From the viewpoint of synchronizing the phases of the opposing surfaces 371 of the first pressing roll 37A and the second pressing roll 37B, if the gear ratio between the first rotating gear 381 and the sixth rotating gear 386 is 1, The number of other gear teeth may be determined arbitrarily, or a two-stage gear may be adopted.
Further, as will be described later, from the viewpoint of causing the second pressing roll 37B to rotate in response to the swinging operation of the second pressing roll 37B, the gear ratio between the fourth rotating gear 384 and the sixth rotating gear 386 is used. If the number is 1, the number of other gear teeth may be arbitrarily determined, or a two-stage gear may be employed.

Next, the operation of the second gear train 37G2 will be described.
As shown in FIG. 14, the first pressing rotation shaft 37S1 is rotated by the first drive motor 37M1. When it does so, the 1st press roll 37A will produce rotation operation. Further, by rotating the first pressing rotation shaft 37S1, the first rotation gear 381, the second rotation gear 382, the third rotation gear 383, the fourth rotation gear 384, the fifth rotation gear 385, and the sixth rotation gear 386 are rotated. Rotate. As described above, the gear ratio of the first rotation gear 381 and the sixth rotation gear 386 is set to 1. Therefore, the first pressing roll 37A and the second pressing roll 37B are synchronized and cause the rotation operation at the same angle. As a result, it rotates so that the predetermined facing surface 371 of the first pressing roll 37A and the predetermined facing surface 371 of the second pressing roll 37B face each other.

  In the present embodiment, both the first pressing roll 37A and the second pressing roll 37B are rotated by the first drive motor 37M1. Therefore, for example, it is not necessary to provide another drive device on the pressing support member 68 on the side of the second pressing roll 37B that swings. As a result, the rocking member is reduced in weight.

Next, angle adjustment of the opposing surface 371 of the second pressing roll 37B in the present embodiment will be described.
By the way, when the structure which rocks the press support member 68 and moves the 2nd press roll 37B is employ | adopted like this embodiment, for example, the 1st press roll 37A is accompanied with the rocking of the press support member 68. It is assumed that the relative angle of the opposed surface 371 of the second pressing roll 37B changes. On the other hand, in this embodiment, the orientation of the opposing surface 371 of the second pressing roll 37B relative to the opposing surface 371 of the first pressing roll 37A is accompanied by the swing of the pressing support member 68 (second pressing roll 37B). It is configured to be changed. That is, in the present embodiment, the second pressing roll 37B performs a swinging motion in a state where the orientation of the facing surface 371 of the second pressing roll 37B with respect to the facing surface 371 of the first pressing roll 37A is maintained. Yes. Hereinafter, this point will be described in detail.

As described above, when the swinging operation or the pressing operation is performed, the second pressing roll 37B is swung by the second drive motor 37M2. In this case, in this embodiment, the pressing support member 68 that supports the second pressing roll 37 </ b> B swings around the second rotation shaft 64.
At this time, the first drive motor 37M1 used when positively rotating to switch the facing surface is in a stopped state. Therefore, the first rotation gear 381, the second rotation gear 382, the third rotation gear 383, and the fourth rotation gear connected to the first drive motor 37M1 due to the resistance of the motor accompanying the stop of the first drive motor 37M1. As for 384, rotation is restricted.

  On the other hand, as described above, the pressing support member 68 swings about the second rotation shaft 64, so that the fifth rotation gear 385 (an example of a transmission unit) is a planetary gear as shown in FIG. It moves while rotating around a four-rotation gear 384 (an example of a first rotation member). And the 5th rotation gear 385 rotates the 6th rotation gear 386 (an example of a 2nd rotation member) to connect. As a result, according to the swing of the pressing support member 68, the second pressing roll 37B to which the sixth rotating gear 386 is fixed rotates. That is, as the pressing support member 68 swings, the orientation of the facing surface 371 of the second pressing roll 37B with respect to the facing surface 371 of the first pressing roll 37A is changed.

  Then, the rotation amount according to the swing angle of the second pressing roll 37B by the pressing support member 68 is transmitted to the second pressing rotation shaft 37S2 of the second pressing roll 37B. Therefore, the second pressing roll 37 </ b> B is configured to rotate so that the inclination of the facing surface 371 accompanying the swinging is canceled regardless of the swinging angle of the pressing support member 68.

In the present embodiment, as described above, the fourth rotation gear 384 and the sixth rotation gear 386 have the same gear ratio. That is, as shown in FIG. 14, the swing angle α1 of the pressing support member 68 and the rotation angle α2 of the sixth rotation gear 386 coincide with each other. The swing angle α1 of the pressing support member 68 also coincides with the rotation angle α3 of the fifth rotation gear 385.
Therefore, in the present embodiment, the orientations of the opposing surfaces 371 with respect to the sheet bundle B (folded portion) do not change regardless of the thickness of the sheet bundle B that is the target of folding processing. Therefore, pressing under predetermined conditions is realized.

In particular, in the present embodiment, for example, the facing surfaces 371 of the first pressing roll 37A and the facing surface 371 of the second pressing roll 37B are closest to each other so that the facing surfaces 371 are substantially parallel to each other. Yes. Therefore, in this embodiment, even if the pressing support member 68 swings and the swing angle changes from the closest state, the opposing surfaces 371 are maintained substantially parallel to each other.
In this embodiment, regardless of the thickness of the sheet bundle B to be folded, a pressing force is applied to the sheet bundle B (folded portion) in a substantially vertical direction without reducing the pressing force. The folded portion of the sheet bundle B is pressed by a strong pressing force. Furthermore, it is also possible to suppress a force from being applied in a direction in which the pressing force is dispersed and, for example, the sheet bundle B is pushed back toward the sandwiching roll 36.

The inclination of the second pressing roll 37B can be adjusted according to the swing angle α1 of the pressing support member 68, and is not limited to the gear described above. For example, the pressing support member 68 (second pressing roll 37B) such as a belt can be swung. You may employ | adopt the transmission part by the other aspect which transmits a moving angle to 2nd press rotating shaft 37S2 of the 2nd press roll 37B.
In the present embodiment, all the first rotation gear 381 to the sixth rotation gear 386 are connected from the viewpoint of synchronizing the first pressing roll 37A and the second pressing roll 37B, but the present invention is not limited to this. . For example, when a configuration in which the first pressing roll 37A does not rotate is adopted, the first pressing roll 37A adjusts the rotation angle of the first pressing roll 37A according to the swing angle α1 of the pressing support member 68. What is necessary is just to comprise. In this case, for example, at least the fourth rotation gear 384, the fifth rotation gear 385, and the sixth rotation gear 386 may be provided.

  Furthermore, in the present embodiment, the opposing surface 371 of the first pressing roll 37A and the opposing surface 371 of the second pressing roll 37B are always substantially parallel, but the present invention is not limited to this. For example, according to the swing angle α1 of the pressing support member 68, the facing surface 371 of the first pressing roll 37A and the facing surface 371 of the second pressing roll 37B are always at a predetermined angle different from substantially parallel. It does not matter if set to Furthermore, the opposing surface 371 of the first pressing roll 37A and the opposing surface 371 of the second pressing roll 37B are not limited to being always maintained at the same angle according to the swing angle α1 of the pressing support member 68. The angle between the opposing surfaces 371 changes according to the swing angle α1 of the member 68, and the amount of change may be set to a predetermined angle.

As described above, in the pressing roll unit 37 of the present embodiment, the second pressing roll 37B is relatively approached to the first pressing roll 37A, and the folded portion of the sheet bundle B is pressed by the approaching operation. As a result, the folded portion is pressed while reducing the load on the sheet bundle B.
Further, when the second pressing roll 37B is swung around the rotation axis and the second pressing roll 37B is relatively approached to the first pressing roll 37A, the second pressing roll 37B is swung. Thus, by changing the orientation of the facing surface 371 of the second pressing roll 37B relative to the facing surface 371 of the first pressing roll 37A, the folded portion of the sheet bundle B is always subjected to predetermined conditions regardless of the thickness of the sheet bundle B. Is pressed against.

  Moreover, in the press roll part 37 of this embodiment and each modification, one of the 1st press roll 37A and the 2nd press roll 37B, or both the 1st press roll member 37A and the 2nd press roll 37B are made into paper. The bundle B is moved in a direction (left-right direction H or up-down direction V) intersecting (orthogonal) with the direction in which the folded portion of the bundle B extends (front-rear direction D). As a result, a state in which the sheet bundle B can move toward the sheet placement unit 45 by its own weight is formed. For example, the sheet bundle B subjected to the pressing process of the folded portion is discharged from the pressing portion 37U, and a special transport roll or the like for transporting the sheet bundle B to the sheet placement unit 45 is unnecessary.

  Further, for example, when the folded portion of the sheet bundle B that has been subjected to the pressing process of the folded portion on the downstream side in the conveyance direction of the sheet bundle B and is further closed by the staple needle is conveyed by being sandwiched by a conveyance roll or the like, There is a possibility that a load is applied to the periphery of the staple needle due to the roll, and the sheet bundle B may be damaged such as wrinkles or tears. On the other hand, in the present embodiment, since the sheet bundle B subjected to the folding portion pressing process is not sandwiched and conveyed, occurrence of damage in the sheet bundle B is suppressed.

In the above-described embodiments and modifications, the first pressing roll 37 </ b> A and the second pressing roll 37 </ b> B are arranged side by side in the vertical direction, and the sheet bundle B is pressed in a state of being provided along the horizontal direction H. However, the present invention is not limited to this mode.
For example, the folded portion may be pressed in a state where the sheet bundle B is provided obliquely with respect to the vertical direction V or in a state where the paper bundle B is provided along the vertical direction V. Even in this case, the sheet bundle B can be dropped and moved to the sheet placing portion 45 by its own weight by moving one of the first pressing roll 37A and the second pressing roll 37B.

  Further, as described above, the folded portion of the sheet bundle B is pressed using the first pressing roll 37A and the second pressing roll 37B which are polygonal roll members having the convex portions 37E. It is not limited to an aspect. For example, the first pressing roll 37 </ b> A has a circular cross section and is opposed to a roll member that is rotatably provided, or is opposed to a non-rotating rectangular pedestal to press the folded portion. You may make it.

Furthermore, it is not always necessary to form the convex portion 37E in the first pressing roll 37A and the second pressing roll 37B. In this case, in the first pressing roll 37A and the second pressing roll 37B, it is not necessary to provide a plurality of surfaces and configure a polygon.
In other words, the pressing roll portion 37 of the present embodiment only needs to be able to press the folded portion so as to sandwich the folded portion of the sheet bundle B by at least one approaching operation. A pair of members such as a pair of roll members and a pair of flat plate members that extend toward each other may be relatively close to each other to press the folded portion.

  In the present embodiment, the second gear 65 is used to mainly perform the swinging operation, and the cam 63 is used to mainly perform the pressing operation. However, the present invention is not limited to this. For example, the pressing operation may be performed using the cam 63 without performing the swinging operation using the second gear 65. Further, the swinging operation and the pressing operation may be performed using only the second gear 65 without performing the pressing operation using the cam 63.

  Furthermore, in this embodiment, the orientation of the facing surface 371 of the second pressing roll 37B is adjusted using the fifth rotating gear 385 or the like that transmits the rotation angle amount of the pressing support member 68. It is not limited to. For example, in order to adjust the orientation of the opposing surface 371 of the second pressing roll 37B, a detection sensor that detects the swing angle of the pressing support member 68, or a detection sensor that detects the orientation of the opposing surface 371 of the second pressing roll 37B. Etc., and the orientation of the facing surface 371 of the second pressing roll 37B may be adjusted according to the detection results.

DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus, 2 ... Post-processing apparatus, 3 ... Transport unit, 4 ... Folding unit, 5 ... Finisher unit, 37 ... Press roll part, 37A ... 1st press roll, 37B ... 2nd press roll, 37S1 ... First pressing rotation shaft, 37S2 ... second pressing rotation shaft, 45 ... sheet placing portion, 61 ... first rotation shaft, 62 ... first gear, 63 ... cam, 64 ... second rotation shaft, 65 ... second gear, 66 ... paper holding section, 67 ... paper bundle holding arm, 68 ... pressing support member, 69 ... pressing arm, B ... paper bundle

Claims (3)

A first facing portion facing the folded portion of the paper;
Rotatably provided around the first axis, and sandwiching the folded portion located in the first opposing portion and the opposition side second opposing portion opposed to said folding portion,
A reciprocating portion which presses the second shaft to oscillate the previous SL second opposing portions centered on the said folding part pair and moved back and forth in front Symbol second opposing portion in the first opposing portion,
A changing unit that the amount of rotation of the swing of the second opposing portion by reciprocating unit is transmitted to the first axis, to change the orientation of the second opposed portion to a predetermined orientation relative to the first opposing portion,
A paper processing apparatus comprising: The second opposing portion, the sheet processing apparatus according to 請 Motomeko 1 that having a plurality of opposing surfaces, wherein the surface opposed to the first opposing portion by rotating the first center axis is switched. An image forming apparatus for forming an image on paper;
A folding processing mechanism for performing a folding process for forming a folded portion on the paper on which an image is formed by the image forming apparatus;
A first opposing portion opposed to the folding unit, rotatably provided around the first axis, said folding unit located in the first opposing portion and the opposition side sandwiching the second opposing opposite to the folded portion And an advancing / retreating part that swings the second opposing part about the second axis, advances and retracts the second opposing part relative to the first opposing part and presses the folding part, and the advancing / retreating part the amount of rotation of the swing of the second opposed portion is transmitted to the first shaft, and the sheet processing apparatus and a maintaining unit for maintaining the orientation of said second opposing portion with respect to said first opposing portion,
An image forming system comprising:

Images