JP2005262409A - Round blade pair cutter, both round blade pair cutter, cutting device and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a round blade pair cutter, a both round blade pair cutter, a cutting device and an image forming device, capable of further surely separating chips generated when cutting a sheet from the sheet. <P>SOLUTION: This round blade pair cutter has a first round blade and a second round blade for meshing and rotating by mutually overlapping; and cuts the sheet in the moving direction by relatively moving the sheet, the first round blade and the second round blade by sandwiching the sheet by the first round blade and the second round blade; and has a separating member for separating the chips of the sheet in the predetermined direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an image forming apparatus, a cutting apparatus used in the image forming apparatus, a double round blade pair cutter used in the cutting apparatus, and a round blade pair cutter used in the double round blade pair cutter.

Japanese Patent Laid-Open No. 06-156773

  Recent image forming apparatuses are capable of obtaining high-quality images through improvements such as digitization and high definition. Along with this improvement in image quality, attempts have been made to develop color image forming apparatuses using the electrophotographic system in the printing market and the photographic market. There is a strong demand for images without margins (prints without borders).

  In order to form a borderless print, there are a method of forming an image having no margin from the beginning to the end of the paper, and a method of forming an image with a margin at the end of the paper and then cutting the margin. In an electrophotographic image forming apparatus, when forming an image with no margins up to the edge of the paper, it is necessary to transfer a toner image substantially larger than the paper size onto the paper. The transfer member is contaminated and the back side of the paper is contaminated. For this reason, cutting the margin is superior in terms of preventing smearing of the printed image. However, in order to cut the margin of the image, a new cutting unit is required in addition to the image forming apparatus.

  Patent Document 1 proposes a technique that uses a roll paper length cutter and a roll paper width cutter as cutting means. In this technique, the paper chips hang down due to their own weight, and are accommodated in the waste paper box by guide plates that guide both sides of the paper.

  However, in the technique disclosed in Patent Document 1, various types of recording sheets having different rigidity, the width of chips (even the same type of recording sheets), and the direction of movement of the chips are different. The chips may enter the recording sheet conveyance surface without being stored in the waste paper box. If chips enter the recording sheet conveyance surface, chips will be discharged together with the cut recording sheet, causing recording sheet conveyance failure and degrading the cutting quality of the recording sheet. May cause problems such as

  The present invention has been made in view of such a problem, and an object thereof is a round blade pair cutter and a double round blade pair cutter that can more reliably separate chips generated when cutting a sheet from the sheet. Another object of the present invention is to provide a cutting device and an image forming apparatus.

  The present invention comprises a first round blade and a second round blade that overlap with each other and rotate, and the sheet is sandwiched between the first round blade and the second round blade, and the sheet, the first round blade and the second round blade It is a round blade pair cutter that cuts a sheet in the moving direction by relatively moving the blade, and a round blade pair cutter that has a separating member that separates chips of the sheet in a predetermined direction. Here, the sheet may be stationary and the sheet may be cut in the moving direction of the first and second round blades by rotating while the first and second round blades move. . The sheet may move in the conveyance direction, the first round blade and the second round blade rotate at a predetermined position, and the sheet may be cut in the conveyance direction.

  The separating member may be disposed along the blade surface of the round blade. The first round blade may be an inner blade, the second round blade may be an outer blade, and the separation member may be disposed along the blade surface of the first round blade. More specifically, the separation member may be configured such that the tip portion thereof contacts the blade surface of the round blade and the tip portion has elasticity. The tip of the separating member may be close to the tip without contacting the blade surface of the round blade.

  Further, the separating member may be a member that guides the chips away from the cut sheet from the upstream side to the downstream side in the sheet conveying direction. More specifically, the separation member may have a first guide surface that guides chips in a direction orthogonal to the conveyance direction from the upstream side to the downstream side in the conveyance direction of the sheet, and the separation member conveys the sheet. You may have a 2nd guide surface which guides so that a chip may leave | separate from a conveyance surface from a direction upstream side to a downstream side. Moreover, you may have both a 1st guide surface and a 2nd guide surface.

  The first round blade is an inner blade, the second round blade is an outer blade, and a roll member adjacent to the second round blade is disposed on the same rotational axis as the rotational axis of the second round blade. You may have. Here, the space | interval of a said 2nd round blade and a roll member can employ | adopt the thing narrower than the width | variety of a chip. Furthermore, the space | interval of said 2nd round blade and roll member can employ | adopt the thing narrower than the thickness of a chip. In addition, the diameter of the second round blade and the diameter of the roll member can be configured to be substantially equal.

  In addition, the present invention provides a set of these two pairs of round blades as a set and maintains a predetermined interval, and the one set of the first round blade and the one set of the second round blade have the same rotating shaft. It is also a double-rounded blade cutter that shares the same. Moreover, this invention is provided with this double round blade pair cutter and the conveyance member which conveys a sheet | seat to the said double round blade pair cutter, and the said sheet | seat is also a cutting device in which the both ends of a conveyance width direction are cut | disconnected. Further, the sheet is a recording sheet, and the recording sheet has an image region and a non-image region surrounding the image region at the center, and is a cutting device that cuts the non-image region. Note that both the recording sheet and the image area can be rectangular. The present invention is also an image forming apparatus including an image forming unit that forms an image in an image area of a recording sheet and the cutting device. The present invention also includes an image forming unit that forms a toner image on a surface image area of a recording sheet that includes an image receiving layer on the surface, a fixing device that embeds and fixes the toner image in the image receiving layer, and a cutting device. It is also an image forming apparatus.

  As described above, according to the present invention, a round blade pair cutter, a double blade pair cutter, a cutting device, and an image forming apparatus that can more reliably separate chips generated when cutting a sheet from the sheet. Can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1
FIG. 1 is a block diagram showing a color multifunction peripheral (image forming apparatus) 100 according to Embodiment 1 of the present invention.

  First, the basic configuration of the color multifunction peripheral 100 will be described. The color multifunction peripheral 100 is roughly divided into an image forming unit, an intermediate transfer unit, a sheet conveying unit, a primary fixing unit 4, a secondary fixing unit (fixing unit) 5, a cutting unit 6, a document reading unit 7, a first discharge unit. A paper tray 101, a second paper discharge tray 102, and the like are included.

  The image forming unit includes image forming units 1Y to 1K corresponding to respective colors of yellow (Y), magenta (M), cyan (C), and black (K), an exposure unit 12, and toner tanks 17Y to 17K. Yes. Each image forming unit 1 includes a photosensitive drum 10 as an image carrier that is rotationally driven in the direction of arrow A in the figure, a charging roll 11 that is disposed around the photosensitive drum 10, a developing device 13, and a primary unit. A transfer roll 14, a photoreceptor cleaning device 15, and a static elimination roll 16 are provided. The image forming unit includes an image processing device (not shown).

  The intermediate transfer portion supports the intermediate transfer belt 20 as an image carrier that is rotationally driven in the direction of arrow B in the drawing at the same moving speed as the peripheral speed of the photosensitive drum 10, and the intermediate transfer belt 20 rotatably. A steering roller 23 that sandwiches the intermediate transfer belt 20, a belt cleaning device 24 that faces the steering roll 23, a backup roll 22, and a secondary transfer roll 21 that sandwiches the intermediate transfer belt 20 and faces the backup roll 22.

  The paper transport unit includes a first paper tray 30 (1) and a second paper tray 30 (2) in which different types of recording paper (recording sheets) p are stored, and pickups 31 (1), 31 (2), A pair of rolling rolls 32 (2) and 32 (2), a pair of conveyance rolls 33 and 34, a pair of resist rolls 35, a path switching chute 36, a first discharge roll pair 37, and a second discharge roll pair 38 are provided. In this embodiment, the paper tray 30 (1) contains postcard size recording paper p (1), and the paper tray 30 (2) contains A3 size recording paper p (2). Note that the recording paper p used in the case of the high gloss processing has an image receiving layer made of a resin of the same type as the resin constituting the toner base material on the surface (the surface onto which the toner image is transferred). is there.

  Next, the basic operation of the color multifunction peripheral 100 will be described. Color image information sent from a host computer such as a personal computer (not shown) or color image information of a color document read by the document reading device 7 is input to the color multifunction peripheral 100. In the color multifunction peripheral 100, the input color image information is subjected to shading correction, position shift correction, brightness / color space conversion, gamma correction, frame deletion, color, and the like by an image processing device (not shown) as necessary. / Predetermined image processing such as moving editing is performed. The image data that has been subjected to predetermined image processing by the image processing apparatus as described above is composed of four color materials of yellow (Y), magenta (M), cyan (C), and black (K) (8 bits each). The data is sent to the exposure unit 12 as gradation data, and the exposure unit 12 performs image exposure with laser light in accordance with the original color material gradation data.

  The exposure unit 12 modulates a semiconductor laser (not shown) according to the original reproduction color material gradation data, and emits a laser beam LB from the semiconductor laser according to the gradation data. The laser beam LB emitted from the semiconductor laser is deflected and scanned by a rotary polygon mirror (not shown), and is transferred onto the photosensitive drum 10 via an f · θ lens (not shown) and a reflection mirror (not shown). Scan exposure is performed. The photosensitive drums 10Y to 10K that are scanned and exposed to the laser beam LB by the exposure unit 12 are rotationally driven at a predetermined speed along the arrow A direction by a driving unit (not shown). The surface of the photosensitive drum 10 is charged in advance with a predetermined polarity (for example, a negative polarity) and a potential by the charging rolls 11Y to 11K for primary charging, and then laser light according to the original reproduction color material gradation data. An electrostatic latent image is formed by scanning exposure of LB.

  The electrostatic latent images formed on the photosensitive drums 10Y to 10K are, for example, developed by four color developing devices 13Y to 13K of yellow (Y), magenta (M), cyan (C), and black (K). The toner image T is reversely developed with toner (charged color material) charged to a negative polarity that is the same polarity as the charged polarity of the photosensitive drum 10, and a toner image T of a predetermined color is obtained. In the developing devices 13Y to 13K, for example, spherical toner having an average particle size of 5.5 μm is used. Further, toner is supplied from the toner tanks 17Y to 17K as necessary.

  The toner images T (Y) to (K) of the respective colors formed on the photosensitive drum 10 are primary-transferred on the intermediate transfer belt 20 disposed on the upper side of the photosensitive drum 10 by the primary transfer rolls 14Y to 14K. Transcribed. Note that the toner remaining on the photosensitive drum 10 without being primarily transferred is removed from the surface of the photosensitive drum 10 by the photosensitive member cleaning device 15. Further, the surface of the photosensitive drum 10 is neutralized by the neutralizing roll 16 in order to erase the potential history.

  On the intermediate transfer belt 20, all four colors of yellow (Y), magenta (M), cyan (C), and black (K) are formed on the photosensitive drum 10 according to the color of the image to be formed. Alternatively, a part of the toner images T (Y) to (K) is transferred in a state where the toner images T (Y) to (K) are sequentially superimposed by the primary transfer rolls 14Y to 14K. The toner image T (F) transferred onto the intermediate transfer belt 20 is conveyed to a secondary transfer position where the secondary transfer roll 21 and the backup roll 22 face each other at a predetermined timing.

  On the other hand, the recording paper p selected by an explicit or implicit instruction from the user is conveyed from the paper tray 30, and picked up 31 (1), 31 (2), and a pair of rolled rolls 32 (2), 32 (2 ), Transported on the transport path by transport roller pairs 33 and 34, and temporarily stopped by resist roll pair 35. Then, in synchronization with the timing at which the toner image T (F) on the intermediate transfer belt 20 reaches the secondary transfer position, the registration roll pair conveys the recording paper p to the secondary transfer position. The toner image T (F) is transferred from the intermediate transfer belt 20 onto the recording paper p by the pressing force and electrostatic attraction force of the secondary transfer roll 21. The toner remaining on the intermediate transfer belt 20 without being subjected to secondary transfer is removed from the surface of the intermediate transfer belt 20 by the belt cleaning device 24.

  The recording paper p on which the toner image T (F) is secondarily transferred is then primarily fixed by a primary fixing device. Then, when high gloss processing is not performed according to an explicit or implicit instruction from the user, the first transport path is selected by the path switching chute 36 and the first discharge roll pair 37 selects the first discharge tray 101. Is discharged. Further, when the high gloss processing is performed according to an explicit or implicit instruction from the user, the second transport path is selected by the path switching chute 36, and the first discharge roll pair 37 leads to the secondary fixing device 5. It is conveyed and subjected to a high gloss process described later. Thereafter, the recording paper p is cut off at the four corners by the cutting device 6 and discharged to the second discharge tray 102 in a state where there is no margin.

  FIG. 2 is a schematic cross-sectional view illustrating the secondary fixing device (fixing device) 5.

  First, the configuration of the secondary fixing device 5 will be described. The secondary fixing unit 5 includes an endless fixing belt 50, a heating roll 51 that rotatably supports the fixing belt 50, a peeling roll 52, three rotating rolls including a walk control roll 53, and a fixing belt 50. A pressure roll 54 that presses against the heating roll 51 to form a nip portion N, a halogen heater 55 that is disposed in a hollow portion of the heating roll 51 and heats a predetermined region of the nip portion N, and an inner surface of the fixing belt 50 On the side, a heat sink 56 for cooling that forcibly cools the recording paper p that is in contact with the fixing belt 50 between the heating roll 51 and the peeling roll 52 and is in close contact with the fixing belt 50, and the recording paper in the nip portion N guide guides 57a and b for guiding p, peeling guides 58a and 58b for assisting the separation of the recording paper p from the fixing belt 50, and the separated recording paper p And a conveying roller pair 59 that transports. The heating roll 51 is rotationally driven by a driving source (not shown). As a result, the fixing belt 50 is rotationally driven in the direction of arrow C in the drawing at a predetermined moving speed V.

  Further, in order to assist the close contact between the conveyed recording paper p and the fixing belt 50, a biasing roll (not shown) that biases the recording paper p to the fixing belt 50 at a position facing the heat sink 56 with the fixing belt 50 interposed therebetween. Is provided. The walk control roll 53 also serves as a tension roll that applies a constant tension to the fixing belt 50.

  Next, the operation of the secondary fixing device 5 will be described. The toner image T (F) is transferred onto the surface of the recording sheet p, and the recording sheet p that has been primarily fixed is guided by the guide guide 57 and enters the nip portion N with the image surface side facing the fixing belt 50. In the nip portion N, the toner constituting the toner image T (F) is melted by the action of the heat from the halogen lamp 55 and the pressure from the pressure roll 54 (the toner is substantially about 120 to 150 ° C.). The toner image T (F) is buried in the image receiving layer of the recording paper p softened by heat.

  Even after the nip portion N is removed, the recording paper p is conveyed while being in close contact with the fixing belt 50. During the conveyance, the heat sink 56 is forcibly cooled, the smoothness of the surface of the fixing belt 50 is transferred to the surface of the recording paper p, that is, the image receiving layer, and the surface of the recording paper p and the toner image T (F) have high gloss. obtain. Then, after the fixing belt 50 is cooled to a temperature equal to or lower than the melting temperature of the color toner T, for example, about 40 ° C. to 80 ° C., in the vicinity of the peeling roll 52, ) From the fixing belt 50.

FIG. 3 illustrates the configuration of the cutting device 6 according to the first embodiment. 3A is a top view of the cutting device 6, FIG. 3B is a front sectional view of the cutting device 6, and FIG. 3C is a side sectional view of the cutting device 6.

  In the figure, a solid line arrow PP indicates the conveyance direction of the recording paper p. The conveyance path PP is composed of a first conveyance path PP (1) and a second conveyance path PP (2). They exist in the same plane and are orthogonal. Moreover, the dotted line arrow in a figure has shown the discharge direction of the chip. The cutting device 6 includes a sensor 60 that detects the presence or absence of the recording paper p from the upstream side to the downstream side of the transport path P, and a first transport roll pair (transport member) that transports the recording paper p in the transport direction PP (1). ) 61, a first cutter (a pair of round blades) 8 (1) that cuts both ends parallel to the conveyance direction PP (1) of the recording paper p. A second conveyance roll pair (conveying member) 62 that conveys in the direction PP (1), and a third conveyance roll pair (abutting / separating) that conveys the recording paper p in the conveyance direction PP (2). (Conveying member) 63, a second cutter (both round blade pair cutter) 8 (2) for cutting both ends parallel to the conveying direction PP (2) of the recording paper p, and a lower portion of the recording paper p conveying plane. Chip transport belt device 64 for transporting the chips to a chip box (not shown) It is equipped with a.

  FIG. 4 illustrates the configuration of the cutter 8. 4A is a top view of the cutter 8, FIG. 4B is a front view of the cutter 8, and FIG. 4C is a side sectional view of the cutter 8.

  The cutter 8 has an upper roll 8u and a lower roll 8l. The upper roll 8u includes a roll shaft 80 and conveying rolls 84a and 84 for conveying the recording paper p in the conveying direction PP from the center portion to the end portion of the roll shaft 80 and inner cutters 81a and b at the end portions in the roll axial direction. Spring 83a, b pressed to the side and inner cutter (first round blade) 81a, b are provided. The lower roll 8l includes a roll shaft 87, transport rollers 86a and 86b for transporting the recording paper p in the transport direction PP from the center to the end of the roll shaft 87, and outer cutters (second round blades) 82a and b. And outer blade mounting rolls (roll members) 85a and b.

  The upper roll 8u and the lower roll 8l are in pressure contact with each other by a pressing means (not shown). Therefore, the pair of the inner blade cutter 81 and the outer blade cutter 82 (round blade pair cutter) meshes with a predetermined overlap amount l. Then, the recording paper p is cut at the upstream portion of the engagement margin. Further, the inner blade cutter 81 is pressed against the outer blade cutter 82 side by the elastic force generated by the spring 83. The pressing load can be determined in view of conditions such as required cut quality and durability of the cutters 81 and 82, and is set to 0.7 N in this embodiment. Further, the cutting edge angle θ (1) of the inner cutter 81 and the cutting edge angle θ (2) of the outer cutter 82 are required cut quality, durability of each cutter 81, 82, and amount of biting of the cutters 81, 82. In this embodiment, the blade edge angles θ (1) and θ (2) are both set to 60 °. Further, the transport rolls 84 and 86 of the upper roll 8u and the lower roll 8l are in pressure contact with each other.

  The outer blade attachment roll 85 is provided in contact with the outer blade cutter 82. The distance d between the outer blade attachment roll 85 and the blade edge of the outer blade cutter 82 is set to be narrower than the width of the chips p ′ of the recording paper p. Therefore, the chips p ′ of the recording paper p do not enter between the outer blade attachment roll 85 and the outer blade cutter 82. Further, the diameter of the outer blade attachment roll 85 is substantially equal to the diameter of the outer blade cutter 82, and the roll width w of the outer blade attachment roll 85 is wider than the width of the chips p ′ of the recording paper p. Therefore, the posture of the chips p ′ discharged from the inner cutter 81 and the outer cutter 82 can be kept constant.

  5 and 6 illustrate the effect of the outer blade mounting roll 85. FIG. FIG. 5 is a front view of the vicinity of the inner blade cutter 81 and the outer blade cutter 82 when the outer blade mounting roll 85 is not used. When the outer blade attachment roll 85 is not used, the chips p ′ of the recording paper p are discharged along the angle θ (2) of the blade edge of the outer blade cutter 82. Therefore, as shown in FIG. 6, as the cutting progresses, the posture of the chip p ′ is not stabilized, and in some cases, the cutting paper p ′ may enter the conveyance path of the recording paper p. By using the outer blade mounting roll 85 as described above, such a problem can be reliably prevented.

  FIG. 7 illustrates the configuration of the separating member 9. FIG. 7A is a top view around the separating member 9, and FIG. 7B is a front view around the separating member 9. The separating member 9 is disposed along the outer blade surfaces of the inner cutter 81 and the outer cutter 82. The distal end portion 90 of the separating member 9 is elastic because it is thin, and slightly contacts the blade surface of the inner cutter 81. It is possible to make the tip portion 90 non-contact with the blade surface of the inner blade cutter 81, but in that case, it is preferable that the tip portion 90 be as close as possible to the blade surface of the inner blade cutter 81. The leading end 90 is preferably provided so as to be close to the position where cutting of the recording paper p is started (that is, the upstream portion where the inner cutter 81 and the outer cutter 82 are engaged). It is done.

  Chips p ′ of the recording paper p are guided to the two surfaces of the separating member 9 by the leading end 90, and are discharged away from the transported surface of the cut recording paper p and the recording paper p. First, the chip p ′ is guided to the outside in the roll shaft 80 direction by the first guide surface 91 of the separating member 9 (see arrow A in FIG. 7A). Next, the chips p ′ are guided to the lower side of the recording sheet conveying surface by the second guide surface 92 of the separating member 9 (see arrow B in FIG. 7B). As a result, the chips p ′ of the recording paper p do not enter the transport path PP. Further, the first guide surface 91 and the second guide surface 92 that are continuously formed prevent the chips p ′ from being discharged in directions other than the predetermined discharge direction.

  FIG. 8 is a top view for explaining a cutting state of the recording paper p by the cutter 8. As shown in the figure, it can be seen that both ends of the recording paper p in the conveyance width direction are cut by the cutter 8, and the chips p 'gradually move away from the cut recording paper p from the upstream side to the downstream side in the conveyance direction.

  Next, operation | movement of this cutting device 4 is demonstrated.

  First, the fixed recording paper p is conveyed from the secondary fixing device 5 along the conveying direction PP. The recording paper p is rectangular as shown in FIG. 9A, and has a rectangular image region I at the center and a non-image region (margin portion) N around it. When the leading end of the recording paper p in the transport direction reaches the sensor 60 portion, the sensor 60 detects that the recording paper p has been transported, and the cutting device 6 contacts the second transport roll pair 62 and the third transport roll pair 63. , And the first transport roll pair 61, the second transport roll pair 62, and the first cutter 8 (1) are rotated. The recording paper p is cut while being transported along the transport path PP (1) by the first cutter 8 (1). Here, the cutting line by the first cutter 8 (1) is a line parallel to the transport direction PP (1) indicated by the dotted line C (1) in FIG. Further, the cut chip p ′ is separated from the cutter surface by the separating member 9 and reliably guided onto the chip transport belt device 64.

  Thereafter, the cutting device 6 temporarily stops the conveyance of the recording paper p at a predetermined position. At this time, the two opposite sides of the recording paper p are completely cut as shown in FIG. And the cutting device 6 spaces apart the 2nd conveyance roll pair 62, makes the 3rd conveyance roll pair 63 contact | abut, and rotates the 3rd conveyance roll pair 63 and the 2nd cutter 8 (2). The cutting device 6 cuts the recording paper p with the second cutter 8 (2) while transporting the recording paper p along the transport path PP (2). Here, the cutting line by the second cutter 8 (2) is a line parallel to the transport direction PP (2) indicated by the dotted line C (2) in FIG. 9B. Further, the cut chip p ′ is separated from the cutter surface by the separating member 9 and reliably guided onto the chip transport belt device 64.

  The recording paper p that has been cut is in the state shown in FIG. 9C, and the entire surface is a so-called border image of the image area. The recording paper p is discharged to the second discharge tray 102 of the multifunction peripheral 100. On the other hand, the chip p ′ is transported and stored in a chip box (not shown) by the chip transport belt device 64.

Embodiment 2
FIG. 10 illustrates the configuration of the cutting device 6 according to the second embodiment. 10A is a top view of the cutting device 6, and FIG. 10B is a front sectional view of the cutting device 6. FIG. In addition, the same code | symbol is attached | subjected about the structure same as Embodiment 1, and the description is abbreviate | omitted.

  In the figure, a solid line arrow PP indicates the conveyance direction of the recording paper p. Moreover, the dotted line arrow in a figure has shown the discharge direction of the chip. The cutting device 6 includes a sensor 60 that detects the presence or absence of the recording paper p from the upstream side to the downstream side of the transport path P, a first transport roll pair (transport member) 61 that transports the recording paper p in the transport direction PP, A first slitter cutter 65 (1) that cuts the rear end of the recording paper p in the direction perpendicular to the transport direction PP; a second transport roll pair (transport member) 62 that transports the recording paper p in the transport direction PP; A cutter (a pair of round blades) 8 that cuts both ends parallel to the conveyance direction PP of the recording paper p, a second slitter cutter 65 (2) that cuts the front end in a direction perpendicular to the conveyance direction PP of the recording paper p, A third conveying roll pair (conveying member) 63 that conveys the recording paper p in its conveying direction PP, and a chip conveying belt device 64 that is disposed below the conveying plane of the recording paper p and conveys the chips to a not-shown chip box. The Eteiru. A guillotine cutter may be used instead of the slitter cutter 65.

  Next, operation | movement of this cutting device 6 is demonstrated.

  First, the fixed recording paper p is conveyed from the secondary fixing device 5 along the conveyance path PP. The recording paper p is rectangular as shown in FIG. 9A, and has a rectangular image region I at the center and a non-image region (margin portion) N around it. When the leading end of the recording paper p in the transport direction reaches the sensor 60 portion, the sensor 60 detects that the recording paper p has been transported, and the cutting device 6 detects the first transport roll pair 61, the cutter 8, and the second transport roll pair 62. Then, the third conveyance roll pair 63 is rotated. The recording paper p is cut by the cutter 8 while being transported along the transport path PP. Here, the cutting line by the cutter 8 is a line parallel to the conveyance direction PP indicated by a dotted line C (1) in FIG.

  Thereafter, the conveyance of the recording paper p is temporarily stopped at a predetermined position. Then, the first slitter cutter 65 (1) and the second slitter cutter (2) are operated to cut the rear end portion and the front end portion perpendicular to the conveyance direction PP of the recording paper p. Note that after the cutting, the first slitter cutter 65 (1) and the second slitter cutter 65 (2) are stopped at predetermined positions.

  The conveyance of the recording paper p is resumed, and the recording paper p is again cut by the cutter 8 while being conveyed along the conveyance path PP. Here, the chip p ′ cut by the cutter 8 is separated from the cutter surface by the separating member 9 and reliably guided onto the chip conveying belt device 64. On the other hand, the chips p ′ cut by the first slitter cutter 65 (1) and the second slitter cutter 65 (2) fall on the scrap transport belt device 64 by free fall. The first slitter cutter 65 (1) and the second slitter cutter 65 (2) return to a predetermined position and stop after the rear end in the conveyance direction of the recording paper p passes directly under the cutter.

  The recording paper p that has been cut is in a state as shown in FIG. 9C, and the entire surface is a so-called border image of the image area. The recording paper p is discharged to the second discharge tray 102 of the multifunction peripheral 100. On the other hand, the chip p ′ is transported and stored in a chip box (not shown) by the chip transport belt device 64.

Embodiment 3
FIG. 11 illustrates the configuration of the cutting device 6 according to the third embodiment. FIG. 11A is a top view of the cutting device 6, and FIG. 11B is a front sectional view of the cutting device 6. In addition, about the structure same as Embodiment 1, 2, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the figure, a solid line arrow PP indicates the conveyance direction of the recording paper p. Moreover, the dotted line arrow in a figure has shown the discharge direction of the chip. The cutting device 6 includes a sensor 60 that detects the presence or absence of the recording paper p from the upstream side to the downstream side in the transport direction PP, a first transport roll pair (transport member) 61 that transports the recording paper p in the transport direction PP, A cutter (a pair of round blades) 8 that cuts both ends parallel to the conveyance direction PP of the recording paper p, a slitter cutter 65 that cuts an end perpendicular to the conveyance direction PP of the recording paper p, and conveyance of the recording paper p. A second conveying roll pair (conveying member) 62 that conveys in the direction PP and a chip conveying belt device 64 that is disposed below the conveying plane of the recording paper p and conveys the chips to a chip box (not shown). A guillotine cutter may be used instead of the slitter cutter 65. It is also possible to reverse the positional relationship between the cutter 8 and the slitter cutter 65 in the transport direction PP. However, in consideration of the moving distance of the slitter cutter 65, it is preferable to dispose the cutter 8 on the upstream side in the transport direction.

  Next, operation | movement of this cutting device 6 is demonstrated.

  First, the fixed recording paper p is conveyed from the secondary fixing device 5 along the conveyance path PP. The recording paper p is rectangular as shown in FIG. 9A, and has a rectangular image region I at the center and a non-image region (margin portion) N around it. When the leading end of the recording paper p in the transport direction reaches the sensor 60 portion, the sensor 60 detects that the recording paper p has been transported, and the cutting device 6 detects the first transport roll pair 61, the cutter 8, and the second transport roll pair 62. Rotate. The recording paper p is cut by the cutter 8 while being transported along the transport path PP. Here, the cutting line by the cutter 8 is a line parallel to the conveyance direction PP indicated by a dotted line C (1) in FIG.

  Thereafter, the conveyance of the recording paper p is temporarily stopped at the first predetermined position. Then, the slitter cutter 65 is actuated to cut the leading end perpendicular to the conveyance direction PP of the recording paper p. After cutting, the slitter cutter 65 returns to a predetermined position and stops. The conveyance of the recording paper p is resumed, and the recording paper p is again cut by the cutter 8 while being conveyed along the conveyance path PP. Similarly, the cutting line by the cutter 8 is a line parallel to the transport direction PP indicated by the dotted line C (1) in FIG.

  Thereafter, the conveyance of the recording paper p is temporarily stopped at the second predetermined position. Then, the slitter cutter 65 is operated to cut the rear end portion orthogonal to the conveyance direction PP of the recording paper p. After the cutting, the slitter cutter 65 stops at a predetermined position and completes the cutting. Similarly, the cutting line by the cutter 8 is a line parallel to the transport direction PP indicated by the dotted line C (1) in FIG.

  Here, the chip p ′ cut by the cutter 8 is separated from the cutter surface by the separating member 9 and reliably guided onto the chip conveying belt device 64. On the other hand, the chip p ′ cut by the slitter cutter 65 falls on the scrap conveying belt device 64 by free fall. The slitter cutter 65 returns to a predetermined position and stops after the rear end in the conveyance direction of the recording paper p passes directly under the cutter.

  The recording paper p that has been cut is in the state shown in FIG. 9C, and the entire surface is a so-called border image of the image area. The recording paper p is discharged to the second discharge tray 102 of the multifunction peripheral 100. On the other hand, the chip p ′ is transported and stored in a chip box (not shown) by the chip transport belt device 64.

  The configurations of the cutting apparatus and the image forming apparatus shown in the first, second, and third embodiments are merely examples of the present invention, and are naturally applicable to cutting apparatuses and image forming apparatuses of other modes. For example, in the MFP 100 according to the first to third embodiments, the secondary fixing device 5 and the cutting device 6 are configured as an integral unit, and are configured to be detachable from the MFP main body. However, the present invention is not limited to this, and it may be configured integrally with the multifunction device main body. In addition, the present invention includes only one photosensitive drum, and toner images of various colors such as yellow (Y), magenta (M), cyan (C), and black (K) are provided on the photosensitive drum. T is sequentially formed, and toner images T of each color such as yellow (Y), magenta (M), cyan (C), and black (K), which are sequentially formed on the photosensitive drum, are multiplexed on the recording sheet. After the transfer, these toner images T are heated and pressed to be fixed on a recording sheet, thereby applying to an image forming apparatus for forming a color image. The image forming apparatus includes a plurality of image forming units corresponding to colors such as yellow (Y), magenta (M), cyan (C), and black (K), and is sequentially formed on the photosensitive drum of each image forming unit. The toner images T of each color such as (Y), magenta (M), cyan (C), and black (K) are transferred onto the recording sheet in a multiple manner, and the toner image T is heated and pressed to be fixed on the recording sheet. Thus, the present invention can be applied to an image forming apparatus that forms a color image.

FIG. 1 is a schematic cross-sectional view of a color multifunction peripheral according to the first embodiment. FIG. 2 is a schematic cross-sectional view of the secondary fixing device of the multifunction machine shown in FIG. FIG. 3 illustrates a cutting device according to the first embodiment. FIG. 4 illustrates the cutter. FIG. 5 illustrates the action of the outer blade mounting roll. FIG. 6 explains the operation of the outer blade mounting roll. FIG. 7 illustrates the configuration of the separating member. FIG. 8 illustrates the operation of the cutter. FIG. 9 illustrates a recording sheet. FIG. 10 illustrates a cutting device according to the second embodiment. FIG. 11 illustrates a cutting device according to the third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Color compound machine (image forming apparatus), 5 ... Secondary fixing device (fixing device), 6 ... Cutting device, 8 ... Cutter (double-round blade pair cutter), 61 ... First conveyance roll pair (conveyance member), 62 ... Second conveying roll pair (conveying member), 63 ... Third conveying roll pair (conveying member), 64 ... Chip conveying belt device, 81 ... Inner blade cutter (first round blade), 82 ... Outer blade cutter (first Two round blades), 85 ... Outer blade mounting roll (roll member), 9 ... Separating member, 91 ... Tip, 91 ... First guide surface, 92 ... Second guide surface

Claims (15)

A first round blade and a second round blade that overlap with each other and rotate,
It is a pair of round blades that cut the sheet in the moving direction by sandwiching the sheet between the first round blade and the second round blade, and relatively moving the sheet and the first round blade and the second round blade,
A round blade pair cutter having a separating member for separating chips of a sheet in a predetermined direction. The round blade pair cutter according to claim 1, wherein the sheet moves in the transport direction, the first round blade and the second round blade rotate at a predetermined position, and the sheet is cut in the transport direction. The round blade pair cutter according to claim 1, wherein the separating member is disposed along a blade surface of the round blade. The first round blade is an inner blade, and the second round blade is an outer blade,
The separation member is disposed along the blade surface of the first round blade. The round blade pair cutter according to any one of claims 2 to 4, wherein the separating member guides the chips away from the cut sheet from the upstream side to the downstream side in the sheet conveying direction. The round blade pair cutter according to claim 5, wherein the separation member has a first guide surface that guides chips in a direction perpendicular to the conveyance direction from the upstream side to the downstream side in the conveyance direction of the sheet. The round blade pair cutter according to any one of claims 2 to 6, wherein the separation member has a second guide surface that guides the chips away from the conveyance surface from the upstream side to the downstream side in the conveyance direction of the sheet. The first round blade is an inner blade, and the second round blade is an outer blade,
The round blade pair cutter according to any one of claims 1 to 7, further comprising a roll member adjacent to the second round blade on the same rotational axis as the rotational shaft of the second round blade. The space | interval of a said 2nd round blade and a roll member is a round blade versus cutter of Claim 8 narrower than the width | variety of a chip. The round blade pair cutter according to claim 8 or 9, wherein a diameter of the second round blade and a diameter of the roll member are substantially equal. The round blade pair cutter according to any one of claims 1 to 10 is set as a set of two while maintaining a predetermined interval, and the set of the first round blade and the set of the second round blade are respectively provided. Double round blade pair cutter that shares the same axis of rotation. The double-round blade pair cutter according to claim 11, and a conveying member that conveys the sheet to the double-round blade pair cutter,
The sheet is cut by both ends in the conveyance width direction. The cutting apparatus according to claim 12, wherein the sheet is a recording sheet, and the recording sheet has an image area and a non-image area surrounding the image area at a center thereof, and the non-image area is cut. An image forming apparatus comprising: an image forming unit that forms an image in an image area of a recording sheet; and the cutting device according to claim 13. An image forming unit that forms a toner image on a surface image area of a recording sheet having an image receiving layer on the surface, a fixing device that embeds and fixes the toner image in the image receiving layer, and a cutting device according to claim 13. Image forming apparatus.

Images