JP2015009342A - Post-processing device and image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a post-processing device capable of preventing jamming of a recording medium to be transported; and an image forming apparatus.SOLUTION: A post-processing device includes: a transport passage; a cutting section to cut a recording medium transported on the transport passage in a transport direction of the recording medium; and a cutting-out section to cut out an unnecessary part of the cut recording medium. The transport passage is divided into a first branch passage to transport the recording medium to be transported to the cutting-out section; and a second branch passage to transport the recording medium to the outside of the cutting-out section. The first branch passage includes a bending absorption part to absorb bending of the recording medium to be transported.

Description

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

In Patent Document 1, a certain amount of recording paper is fed, a part of the margin is cut with a cutter, a certain amount of feeding of the recording paper and a cutting operation with the cutter are repeated, and the entire margin is cut. A configuration for chopping is disclosed.
In Patent Document 2, a paper discharge guide mechanism is provided on the downstream side of the rotary cutter device, and the paper discharge guide mechanism rotates between a closed position that closes the opening of the waste box and an open position that opens the waste box. And a movable flap 72 that moves the carriage 43 that holds the disc blade 42 by the interlocking member 73 and the movable flap 72 to link the cut chips and the cut recording paper. .
Patent Document 3 discloses a configuration in which an unnecessary portion formed at the front end of the recording paper 19 is cut a plurality of times by a cutter 29 and the unnecessary portion is formed in a strip shape and stored in a deposition container 39.

JP 2001-162878 A JP 2003-326783 A Japanese Patent Laid-Open No. 04-141399

  An object of the present invention is to provide a post-processing apparatus and an image forming apparatus that can prevent a recording medium being conveyed from being clogged.

  The present invention according to claim 1 includes a transport path, a cutting unit that cuts the recording medium transported to the transport path in the transport direction, and a cutting unit that cuts an unnecessary part of the cut recording medium. The transport path branches into a first branch path for transporting the recording medium transported to the cutting section and a second branch path for transporting the recording medium other than the cutting section, and the first branch path The branch path is a post-processing device provided with a bending absorbing portion that absorbs bending of the recording medium to be conveyed.

  The present invention according to claim 2 is the post-processing apparatus according to claim 1, wherein the bending absorbing portion has a movable member movable on the upstream side in the recording medium conveyance direction.

  The present invention according to claim 3 is the post-processing according to claim 1, wherein the bending absorbing portion is constituted by a space provided so that the vertical width of the recording medium is wider than the upstream side in the recording medium conveyance direction. Device.

  According to a fourth aspect of the present invention, there is provided an image forming apparatus main body, and a post-processing apparatus that is detachably attached to the image forming apparatus main body. The post-processing apparatus includes a transport path and a transport path. A cutting unit that cuts the transported recording medium in the transport direction; and a cutting unit that cuts an unnecessary portion of the cut recording medium. The transport path transports the recording medium transported to the cutting unit. And a second branch path for transporting the recording medium other than the cutting section, and the first branch path is bent to absorb the bending of the transported recording medium. An image forming apparatus provided with an absorber.

  According to the first aspect of the present invention, it is possible to provide a post-processing apparatus that can prevent the recording medium being conveyed from being clogged.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, it is possible to provide a post-processing apparatus that can prevent clogging of a conveyed recording medium with a simple configuration. .

  According to the third aspect of the present invention, in addition to the effect of the first aspect of the invention, it is possible to provide a post-processing apparatus that can prevent clogging of a conveyed recording medium with a simple configuration. .

  According to the fourth aspect of the present invention, it is possible to provide an image forming apparatus capable of preventing clogging of a conveyed recording medium.

1 is an overall configuration diagram of an image forming apparatus according to an embodiment of the present invention. 1 is a diagram illustrating a post-processing device used in an image forming apparatus according to an embodiment of the present invention. The folding line formation part used for the post-processing apparatus which concerns on one Embodiment of this invention is shown, (a) shows an example of the movement at the time of folding line formation, (b) is the movement at the time of not forming a folding line FIG. 2A and 2B show a cutting unit used in a post-processing apparatus according to an embodiment of the present invention, in which FIG. 1A is a diagram viewed from a lateral surface with respect to a recording medium conveyance direction, and FIG. It is. It is a figure which shows the cutting part periphery used for the post-processing apparatus which concerns on one Embodiment of this invention. It is the figure which looked at the cutting part periphery used for the post-processing apparatus which concerns on one Embodiment of this invention from the upper direction. It is a schematic diagram which shows the conveyance path from the cutting part used for the post-processing apparatus which concerns on one Embodiment of this invention to an accommodating part. It is a figure which shows the cutting part periphery used for the post-processing apparatus which concerns on other embodiment of this invention.

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

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

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

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

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

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

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

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

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

  As shown in FIG. 2, the post-processing device 14 corrects the conveyance path 40 as a conveyance unit for conveying the recording medium and the inclination (registration, skew) of the recording medium P conveyed from the upstream side in the recording medium conveyance direction. A correction unit 43 that performs the detection, a detection unit 51 such as a line sensor that detects the recording medium P corrected by the correction unit 43, a crease forming unit 42 that folds the recording medium P to be conveyed, and a conveyance unit. Cutting units 44 and 44 for cutting the recording medium P in the transport direction, and a storage unit that is provided below the cutting units 44 and 44 and accommodates unnecessary portions CP of the recording medium P cut by the cutting units 44 and 44. 45. Further, above the entrance 49 of the accommodating portion 45, cutting portions 46, 46 for further finely cutting (cutting) the recording medium unnecessary portion CP cut by the cutting portions 44, 44 are provided.

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

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

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

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

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

  Here, the length of the conveyance path from the crease forming unit 42 to the cutting unit 44 is equal to or longer than the length of the recording medium P to be conveyed. In addition, the length of the transport path 40 from the transport inlet 39 of the transport path 40 to the correction unit 43 is equal to or longer than the length of the recording medium P to be transported.

  FIG. 3 shows a folding line forming unit 42 according to an embodiment of the present invention, (a) shows an example of movement when forming a folding line on the recording medium P, and (b) shows a recording medium. An example of movement when no crease is formed in P is shown.

The crease formation unit 42 includes an upper block 50a provided above and a lower block 50b provided below, with the first conveyance path 40a interposed therebetween.
The upper block 50a has a recess 52a formed on one surface, and a protrusion 54a formed on the surface opposite to the recess 52a.
The lower block 50b has a concave portion 52b formed on one surface, and a convex portion 54b formed on the surface opposite to the concave portion 52b.
The concave portion 52a of the upper block 50a and the convex portion 54b of the lower block 50b are fitted, and the convex portion 54a of the upper block 50a and the concave portion 52b of the lower block 50b are fitted.
Shaft portions 54 are provided at substantially the centers of the upper block 50a and the lower block 50b, and are respectively held rotatably around the shaft portion 54.
The lower block 50b is movable in a substantially vertical direction (vertical direction) with respect to the first transport path 40a by a mechanism (not shown).

That is, when a crease is formed in the recording medium P to be conveyed, as shown in FIG. 3A, the convex portion 54a of the upper block 50a and the concave portion 52b of the lower block 50b are first conveyed. Rotating to a position facing the path 40a, the lower block 50b is moved upward substantially perpendicular to the first transport path 40a. Further, the concave portion 52a of the upper block 50a and the convex portion 54b of the lower block 50b rotate to a position facing the first conveying path 40a, so that the lower block 50b is substantially perpendicular to the first conveying path 40a. As a result, the fold line in the direction opposite to the fold line described above is formed.
That is, by making the upper block 50a having at least two shapes and the lower block 50b having at least two shapes rotatable, the direction of the crease formed on the recording medium P can be changed.

  4A and 4B show a cutting unit 44 according to an embodiment of the present invention, in which FIG. 4A is a diagram viewed from the side with respect to the recording medium conveyance direction, and FIG. 4B is a diagram viewed from the recording medium conveyance direction. is there.

As shown in FIG. 4A, the cutting unit 44 includes a pressing unit 47 provided above and a rotary cutter 48 provided below, with the second conveyance path 40b interposed therebetween. Is done. As shown in FIG. 4B, the cutting portions 44 are provided on both sides of the second transport path 40b.
The rotary cutter 48 is disposed at a portion to be cut of the recording medium P, rotates clockwise, and cuts while conveying the recording medium P.
The pressing portion 47 is disposed at a position facing the rotary cutter 48 and presses the recording medium P to be cut by rotating counterclockwise.
In other words, the rotary cutters 48, 48 provided at positions facing the second transport path 40 b are pressed by the pressing portions 47, 47 while the pressing portions 47, 47 rotate and hold both ends of the recording medium P to be conveyed. Is rotated in the opposite direction, the recording medium P is cut in the transport direction, and both ends (top and bottom) of the recording medium P are cut.
Moreover, the cutting parts 44 and 44 are moved right and left according to the width | variety cut by the detection of the detection part 51. FIG.

  FIG. 5 shows the periphery of the cutting section 46 according to an embodiment of the present invention.

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

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

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

  6 is a view of the periphery of the cutting portions 44, 44 from above, and FIG. 7 is a schematic diagram showing a conveyance path from the cutting portion 44 to the accommodating portion 45. As shown in FIG.

  As shown in FIGS. 6 and 7, the recording medium unnecessary portion CP cut by the cutting portions 44, 44 is guided to the movable member 60 and conveyed to the branch path 41d and the branch path 41e to be cut. It passes through each of the portions 46 and 46 and is further finely cut and accommodated in the accommodating portion 45. On the other hand, the recording medium P from which unnecessary portions have been cut is conveyed to the branch path 41 c and discharged to the discharge port 53.

  FIG. 8 shows the periphery of the cutting section 46, and a branch path 41d (41e) as a loop absorption section according to another embodiment.

  In the above-described embodiment, the example in which the movable member 60 is provided at each of the branch portions of the branch path 41d and the branch path 41e as the loop absorption section has been described in detail. However, in this embodiment, the branch path 41d in which this loop occurs. A space K is provided in each of the branch portions of the branch path 41e so that the vertical width of the recording medium is wider than the upstream side in the recording medium conveyance direction. As described above, even if the space K is provided, the space K absorbs the loop and the occurrence of jamming of the recording medium passing through the cutting portions 46 and 46 is prevented.

  In the present embodiment, the example in which the crease forming unit 42 and the cutting unit 44 are used in the post-processing device 14 has been described. However, the present invention is not limited to this, and the post-processing device 14 may be used for a post-processing device that performs other processing.

  Further, in the present embodiment, the example in which the recording medium unnecessary portion CP is accommodated in one accommodation portion 45 from the branch path 41d and the branch path 41e has been described. It may be provided so that it is accommodated in the accommodating portions 45 and 45 from the branch path 41d and the branch path 41e, respectively.

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

  As described above, the present invention can be applied to an image forming apparatus such as a copying machine, a printer, and a facsimile machine.

DESCRIPTION OF SYMBOLS 10 ... Image forming apparatus 12 ... Image forming apparatus main body 14 ... Post-processing apparatus 40a ... 1st conveyance path 40b ... 2nd conveyance path 42 ... Folding line formation part 44. .... Cutting part 45 ... accommodating part 46 ... cutting part 60 ... movable member

Claims (4)

A transport path;
A cutting section for cutting the recording medium conveyed in the conveying path in the conveying direction;
A cutting unit for cutting unnecessary portions of the cut recording medium,
The transport path branches into a first branch path that transports a recording medium transported to the cutting section, and a second branch path that transports a recording medium other than the cutting section,
The post-processing apparatus, wherein the first branch path is provided with a bending absorption section that absorbs bending of the recording medium to be conveyed.   The post-processing apparatus according to claim 1, wherein the bending absorbing portion includes a movable member movable on the upstream side in the recording medium conveyance direction.   The post-processing apparatus according to claim 1, wherein the bending absorption unit is configured by a space provided so that a vertical width of the recording medium is wider than an upstream side in a recording medium conveyance direction. An image forming apparatus main body, and a post-processing apparatus detachably attached to the image forming apparatus main body,
The post-processing device includes:
A transport path;
A cutting section for cutting the recording medium conveyed in the conveying path in the conveying direction;
A cutting unit for cutting unnecessary portions of the cut recording medium,
The transport path branches into a first branch path that transports a recording medium transported to the cutting section, and a second branch path that transports a recording medium other than the cutting section,
The image forming apparatus, wherein the first branch path is provided with a bending absorbing portion that absorbs bending of a recording medium to be conveyed.

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