JP3598691B2 - Image forming device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image forming apparatus, and more particularly, to an image forming apparatus that forms an image on continuous paper.
In recent years, with the speeding up of printers, the paper transport speed has also increased. This tendency is no exception in printers using continuous paper. However, continuous paper sheets are perforated, alternately folded, stacked, and packed. One end of the continuous paper is supplied to the transfer unit, and the printer performs printing while sequentially transporting the continuous paper. At this time, since the continuous paper is continuous, the paper is continuously supplied to the printer and printing can be continuously performed.
[0002]
At this time, the continuous paper was folded, and due to the stiffness of the fold of the paper, the print quality near the fold was degraded without being closely attached to the transfer portion near the fold.
Therefore, the present invention reduces the stiffness of the fold of the paper by a pressing mechanism having a pointed member that applies a load in a direction opposite to the perforation of the paper on the upstream side of the transport tractor, and reduces the strength of the fold of the paper. To provide a paper transport device that can closely contact a transfer unit.
[0003]
[Prior art]
Conventionally, continuous paper printers which attempt to improve the print quality near the fold by correcting the folds of the continuous recording paper have already been disclosed in JP-A-63-74856, JP-A-7-261576, and JP-A-55-55576. No. 149959 has been proposed.
[0004]
Japanese Patent Application Laid-Open No. 63-74856 discloses a continuous form transport apparatus in which tractor belts for transporting recording paper are provided on both sides of a transfer point, and torque is applied in opposite directions by each tractor belt.
Further, the transfer device of the electrophotographic apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 7-261576 discloses a continuous recording paper that has been conveyed to a transfer unit by a tractor and is continuously transferred between a transfer guide (pressing plate) and a pressing roller immediately before the transfer unit. By sandwiching the recording paper, the fold of the continuous recording paper has been corrected.
[0005]
Further, the printing apparatus disclosed in Japanese Patent Application Laid-Open No. 55-149959 includes a plurality of rollers, and straightening means for pressing from the upper and lower surfaces of the continuous recording paper is provided in front of the tractor to correct a fold of the continuous recording paper. Further, as a conventional example of a printing apparatus disclosed in Japanese Patent Application Laid-Open No. 55-149959, a method of correcting a fold by stretching a continuous recording sheet by pressing a continuous recording sheet after being conveyed to a transfer unit by a tractor with a leaf spring. Is described.
[0006]
[Problems to be solved by the invention]
However, since the continuous form transport device disclosed in Japanese Patent Application Laid-Open No. 63-74856 merely applies tension to the continuous recording paper at the transfer section, the fold cannot be sufficiently corrected, and the fold does not adhere to the transfer section. In addition, there is a problem that printing is missing or blurred near the fold.
[0007]
Further, the transfer device of the electrophotographic apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 7-261576 has a configuration in which a fold is corrected by simply sandwiching between a roller and a plate. When this is done, there is a problem in that the ink does not adhere to the transfer portion, and therefore, missing or blurred printing occurs near the fold. Further, in the transfer device of the electrophotographic apparatus disclosed in JP-A-7-261576, since the fold is corrected after the tractor, the fold remains when supplied to the tractor. There has been a problem that the engagement state deteriorates, which affects the conveyance of the continuous recording paper.
[0008]
Further, the printing apparatus disclosed in Japanese Patent Application Laid-Open No. 55-149959 makes the continuous recording paper pass between a plurality of rollers, which complicates the apparatus configuration, increases the cost, increases the size, and increases the overall size of the printer. There were problems such as an increase in size. Further, in the printing apparatus disclosed in Japanese Patent Application Laid-Open No. 55-149959, it is necessary to insert the continuous recording paper between a plurality of rollers when the continuous recording paper is loaded. Had a problem
Further, in the conventional example of Japanese Patent Application Laid-Open No. 55-149959, tension is applied to the continuous recording paper by a leaf spring, and only one side is pressed, so that it is effective against a fold in one direction. When the fold reaches the transfer section, the fold does not adhere to the transfer section, and therefore, there is a problem such as missing or blurred print near the fold. There was a point. Further, there is a possibility that the continuous recording paper may be damaged due to excessive tension. Further, since it is necessary to provide the tractor on the transfer portion side, the tractor is supplied with a fold, and the engagement state between the tractor and the continuous recording paper is deteriorated, thereby affecting the conveyance of the continuous recording paper. There was a point.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an image forming apparatus capable of reliably correcting a fold of a continuous recording sheet and improving print quality near the fold.
[0010]
[Means for Solving the Problems]
First inventionIs an image forming apparatus including a sheet conveying device that conveys a recording sheet, and an image forming unit that forms an image on the recording sheet conveyed by the sheet conveying device. A first pointed member that is provided in front of the apparatus and that presses the recording sheet in one direction perpendicular to the recording surface of the recording sheet, on which the recording sheet slides; A second pointed shape that is provided in front of the paper transport device and presses the recording paper in a direction opposite to the one direction perpendicular to the recording surface of the recording paper, and the recording paper slides. With componentsThe first pointed member is provided closer to the sheet conveying device than the second pointed member, and the first and second pointed members are pointed at a portion that contacts the recording sheet. And each of the pointed portions of the second pointed member has a larger bending radius than the pointed portion of the first pointed member.It is characterized by the following.
[0011]
The first inventionAccording to the first aspect, the recording sheet is pressed in one direction perpendicular to the recording surface by the first pointed member, and the portion bent in the other direction perpendicular to the recording surface of the recording sheet is reversed. The recording paper is pressed in the other direction perpendicular to the recording surface by the second pointed member, and is bent in one direction perpendicular to the recording surface of the recording paper. The bent part can be bent in the opposite direction to flatten the fold. At this time, since the first and second pointed members are provided in front of the sheet conveying device on the sheet path, the first and second pointed members are supplied to the sheet conveying device after the fold is corrected. The pointed member does not affect the conveyance of the sheet, so that the sheet can be satisfactorily conveyed and transferred.
[0012]
Further, since the recording paper slides on the first and second pointed members, the fold can be reliably corrected..
[0013]
PreviousThe first pointed member and the second pointed member are swingably mounted in a direction perpendicular to a recording surface of the recording sheet.May be configured.This configurationAccording to the first aspect, the first pointed member is swingably mounted in a direction orthogonal to the recording surface of the recording sheet so that the first pointed member can be moved when a load more than necessary is applied to the recording sheet. The recording paper is swung and the pressure applied to the recording paper is kept substantially constant, so that the recording paper can be prevented from being cut.
[0014]
According to a second aspect of the present invention, there is provided an image forming apparatus including a sheet conveying device that conveys a recording sheet, and an image forming unit that forms an image on the recording sheet conveyed by the sheet conveying device. A first pointed member that is provided in front of the paper transport device and that presses the recording paper in one direction orthogonal to the recording surface of the recording paper and slides the recording paper; A sheet pressing device is provided in front of the sheet transport device on a sheet path, and presses the recording sheet in a direction opposite to the one direction perpendicular to a recording surface of the recording sheet, and the recording sheet slides. And two pointed members,A first retracting unit that retracts the first pointed member and the second pointed member at a position where the recording sheet is not pressed;The recording paper can be conveyed at positions where the recording paper is not pressed by the first pointed member and the second pointed member.It is characterized by the following.The second invention aboveAccording to the first aspect, by providing the first retracting means, the first and second pointed members can be retracted to positions where the recording paper is not pressed, and special fold correcting means such as thick recording paper is required. In other words, in the case where the load becomes excessively large through the correction means, the load can be reduced, and printing can be performed without breaking the paper.
[0015]
PreviousA second retracting means for retracting the first pointed member and the second pointed member so that the recording paper transport path is opened;It may be configured. This configurationBy providing the second retracting means, the first and second pointed members can be retracted so that the recording paper transport path is opened, so that the paper path can be easily formed.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a block diagram of an image forming apparatus according to an embodiment of the present invention.
The image forming apparatus 1 according to the present embodiment mainly includes a printing unit 2 that performs printing, and a transport unit 4 that transports the continuous recording paper 3 to the printing unit 2.
[0017]
The printing unit 2 constitutes a laser printer, and supplies a photosensitive drum 11, a charger 12 for uniformly charging the photosensitive drum 11, and supplies a laser beam corresponding to a print image to the uniformly charged photosensitive drum 11. An optical unit 13 for forming an electrostatic latent image on the surface of the drum 11, and a developing device for supplying toner to the photosensitive drum 11 on which the electrostatic latent image has been formed by the optical unit 13 and forming a toner image on the surface of the photosensitive drum 11 14. A transfer device 15 for electrostatically transferring the toner image formed on the surface of the photosensitive drum 11 by the developing device 14 to the continuous recording paper 3 conveyed by the conveyance unit 4, and a continuous recording paper for the toner image by the transfer device 15. 3 includes a diffusion member 16 for diffusing the toner remaining on the photosensitive drum 11 transferred to the continuous recording paper 3, and a fixing device 17 for fixing the toner image transferred to the continuous recording paper 3 to the continuous recording paper 3.
[0018]
FIG. 2 shows a configuration diagram of a continuous recording sheet used in one embodiment of the present invention.
The continuous recording paper 3 is formed in a belt shape as shown in FIG. 2A, and perforations 3a are formed at predetermined lengths, and as shown in FIG. 2B, a mountain fold is formed at the perforations 3a. It is folded alternately in a valley fold. Guide holes 3b are formed at both ends of the continuous recording paper 3 at a constant pitch.
[0019]
Further, after printing, perforations 3c are formed slightly inward from both side ends so that the formation portions of the guide holes 3b can be separated. The continuous recording paper 3 having the above configuration is mounted on the transport unit 4 and supplied to the printing unit 2 by the transport unit 4.
The transport unit 4 is provided near a tractor 21 that draws in the continuous recording paper 3 and supplies it to the printing unit 2 and discharges the continuous recording paper 3 and a guide member 22 that guides the continuous recording paper 3 to the tractor 21. , 23, and a correction device 24 provided near the guide members 22, 23 between the guide members 22, 23 and the tractor 21, and for correcting the fold of the continuous recording paper 3.
[0020]
The tractor 21 includes a belt portion 31 that engages with a guide hole 3b formed in a side portion of the continuous recording paper 3, a motor 32 that drives the belt portion 31, and a guide roller 33 that moves the belt 31 along a predetermined path. You. The belt portion 31 is formed with a moving path by a motor 32 and a guide roller 33 so as to engage with the continuous recording paper 3 at two locations on the entrance side and the exit side of the transfer unit 15. The continuous recording paper 3 is conveyed in the direction of arrow A by engaging with the guide holes 3a.
[0021]
The guide members 22 and 23 are formed by bending a metal plate, and are fixed near the inlet of the continuous recording paper 3, and the continuous recording paper 3 in the curved portion comes into contact with the continuous recording paper 3 to engage the tractor 21. Guide so that matching paths are formed.
The straightening device 24 is provided near the guide members 22 and 23 between the guide members 22 and 23 and the tractor 21.
[0022]
FIG. 3 shows a side view of a straightening device according to one embodiment of the present invention.
The correction device 24 includes a first pressing mechanism 31 for pressing the continuous recording paper 3 in the direction of arrow B and a second pressing mechanism 32 for pressing the continuous recording paper 3 in the direction of arrow C.
[0023]
The first pressure mechanism 31 includes a first pointed member 41 extending in a direction (a direction perpendicular to the plane of the drawing) perpendicular to a conveying direction (direction of arrow A) of the continuous recording paper 3 on the recording surface. A holding member 43 fixed on the frame member 42 and rotatably holding the first pointed member 41 in the direction of arrow E, and a coil spring 44 for urging the first pointed member 41 in the direction of arrow E1. You. The first pointed member 41 has a pointed portion formed by bending a metal plate into a substantially rectangular shape, and the pointed portion serving as the bent portion comes into contact with the continuous recording paper 3. ing.
[0024]
The first pointed member 41 presses the continuous recording paper 3 from below (in the direction of arrow H1). Further, the first pointed member 41 is held by the holding member 43 so as to be rotatable around the support shaft 45 at both side ends, and is configured to be capable of absorbing excessive pressure.
The holding member 43 is fixed to a predetermined position of the frame member 42 on the lower surface side, and rotatably holds the first pointed member 41 on both side surfaces.
[0025]
Further, the first pointed member 41 and the holding member 43 are connected by a coil spring 44. One end of the coil spring 44 is engaged with an engaging portion 41 a provided below the first pointed member 41, and the other end is engaged with an engaging portion 43 a provided above the holding member 43.
[0026]
Further, a stopper 46 is provided on the upper surface side of the holding member 43, and the stopper 46 regulates the rotation of the first pointed member 41 in the direction of the arrow E2.
The second pressing mechanism 32 includes a second pointed member 51 extending in a direction (a direction orthogonal to the paper surface of the drawing) orthogonal to a transport direction (the direction of the arrow A) on the recording surface of the continuous recording paper 3, The holding member 52 is fixed on the frame member 42 and holds the second pointed member 51 so as to be able to retract in the directions indicated by arrows F and G. The second pointed member 51 has a pointed portion formed by bending a spring plate into a substantially U-shape, and the pointed portion serving as the curved portion comes into contact with the continuous recording paper 3. .
[0027]
The second pointed member 51 presses the continuous recording paper 3 from a direction opposite to the first pointed member 41 (upper surface, arrow H2 direction). The second pointed member 51 is formed of a leaf spring, and is configured to be able to maintain the pressure on the continuous recording paper 3 in an appropriate pressurized state. Further, the second pointed member 51 is screwed to the holding portion 52 and held by a retracting mechanism provided on the holding member 52 so as to be retractable in the directions of the arrow F and the arrow G.
[0028]
The holding portion 52 includes a first holding member 52a that holds the second pointed member 51, and a second holding member 52b that holds the first holding member 52a so as to be rotatable around a shaft 53 in a direction indicated by an arrow F. , And a third holding member 52c that holds the second holding member 52b so as to be rotatable about the shaft 54 in the direction of arrow G. A second pointed member 51 is screwed to the first holding member 52a with a screw 55, and is held at both ends by a second holding member 52b so as to be rotatable around a support shaft 53. Further, a lever 56 for performing an operation for rotating the first holding member 52a is screwed to the first holding member 52a.
[0029]
The second holding member 52b includes a first holding member 52a and a pressing position at which the second pointed member 51 applies pressure to the continuous recording sheet 3; Is provided, and a lock mechanism 57 is provided to lock the first holding member 52a with the retracted position, and the first holding member 52a is locked at either the pressing position or the retracted position.
[0030]
By operating the lever 56 fixed to the first holding member 52a in accordance with the thickness of the continuous recording paper 3 to be used, the pressure of the second pointed member 51 on the continuous recording paper 3 is switched and used. Corresponding to the continuous recording paper 3 to be used.
The second holding member 52b is held by the third holding member 52c so as to be rotatable around a shaft 57. The shaft 57 penetrates one end of the second holding member 52b in the direction of arrow I, and holds the second holding member 52b rotatably in the direction of arrow F with respect to the third holding member 52c. are doing.
[0031]
The third holding member 52c is fixed to the frame member 42, holds the shaft 57 of the second holding member 52c at the upper side end, and rotates the second holding member 52c with respect to the third holding member 52c. Hold freely.
Further, a lock mechanism 58 for locking the second holding member 52b is provided at a side end of the third holding member 52c opposite to the side end holding the shaft 57 of the second holding member 52b. The lock mechanism 58 is composed of a flange 58a provided on the second holding member 52b and a convex portion 58b engaged with the flange 58a provided on the third holding member 52c, and the flange 58a is elastically deformed. As a result, the flange 58a and the protrusion 58b are engaged with each other, and the second holding member 52b is placed above the third holding member 52c in a state parallel to the continuous recording paper 3. Lock.
[0032]
Next, the operation of the correction device 24 will be described with reference to the drawings.
First, an operation for setting the continuous recording paper 3 will be described.
FIG. 4 is a view for explaining the operation of the straightening device of one embodiment of the present invention when continuous recording paper is loaded. 4A shows a state before the continuous recording paper is mounted, FIG. 4B shows a state after the continuous recording paper is mounted, and FIG. 4C shows a state after the continuous recording paper is mounted.
[0033]
Since the continuous recording paper 3 needs to be provided between the first pointed member 41 and the second pointed member 51, the lock mechanism 58 is operated from the state shown in FIG. The second holding member 52b of the pressure mechanism 32 is released from the third holding member 52c. After releasing the lock mechanism 58, the second holding member 52b is largely rotated in the direction of arrow G1 so that the second holding member 52b is moved to a position where it does not cover the path of the continuous recording paper 3 as shown in FIG. Move.
[0034]
After the second holding member 52b is moved to a position where the second holding member 52b does not extend along the path of the continuous recording paper 3, the first pressing is performed by passing the continuous recording paper 3 from the upper surface of the third holding member 52c to between the members on both side ends. It is placed on the upper surface of the first pointed member 41 constituting the mechanism 31. After the continuous recording paper 3 is passed between the third holding members 52c and the upper surface of the first holding members 52a, the second holding members 52b are turned in the direction of arrow G2, and FIG. As shown in (2), the second holding member 52b is laid over the upper opening of the third holding member 52c. The second holding member 52b is locked by the lock mechanism 58 of the third holding member 52c.
[0035]
When the second holding member 52b is laid across the upper opening of the third holding member 52c and locked, the second cusp fixed to the second holding member 52b via the first holding member 52a. The member 51 presses the continuous recording paper 3 from above. When the continuous recording paper 3 is pressed from above (in the direction of the arrow H2) by the second pointed member 51, the continuous recording paper 3 is bent in the direction of the arrow. Further, the continuous storage paper 3 is pressed from below (in the direction of arrow H1) by the first pointed member 41 of the first pressing mechanism 31, and is bent in the direction of arrow H1.
[0036]
Here, when printing is started, the continuous recording paper 3 is moved in the direction of arrow A while sliding on the first and second pointed members 51 and 41.
Next, the operation of the correction device 24 during printing will be described.
5 and 6 are explanatory views of the operation of the correction device of the embodiment of the present invention at the time of printing.
[0037]
When moving, the continuous recording paper 3 is first bent downward (in the direction of arrow H2) by the second pointed member 51, and then bent upward (in the direction of arrow H1) by the first pointed member 41. Is done.
Here, as shown in FIG. 5 (A), the bent portion of the continuous recording paper 3 is mountain-folded, and the portion 3d where the fold is projected upward (in the direction of arrow H1) is formed as shown in FIG. 5 (B). 24, the bent portion slides and moves while being pressed by the second pointed member 51 in the direction of the arrow H2 opposite to the bending direction of the bent portion. The waist strength of the fold is greatly reduced, and the fold is corrected. Therefore, the bent portion of the continuous recording paper 3 in the mountain fold can be reliably corrected.
[0038]
Further, as shown in FIG. 6A, the bent portion of the continuous recording paper 3 is trough-folded, and a portion 3e having a fold projected downward (in the direction of the arrow) is applied to the correction device 24 as shown in FIG. 6B. When supplied, the bent portion 3e slides and moves while being pressed by the first pointed member 41 in the arrow H1 direction opposite to the bending direction of the bent portion. The waist strength is greatly reduced and the folds are straightened. Therefore, the bent portion of the valley fold of the continuous recording paper 3 can be reliably corrected.
[0039]
As described above, the continuous recording paper 3 engages with the tractor 21 after both the crests and the valley folds are reliably corrected by the first and second pressurizing mechanisms 31 and 32. 21 can be reliably performed. The continuous recording paper 3 conveyed by the tractor 21 is supplied to the transfer unit 15. At this time, the continuity of the continuous recording paper 3 is reduced by the first and second pressing mechanisms 31 and 32 in both the crest and the valley fold, and the continuous recording paper 3 is reliably corrected. In the transfer unit 15, the fold portion of the continuous recording paper 3 can be made substantially flat, and the toner image formed on the photosensitive drum 11 can be transferred without distortion.
[0040]
5 and 6, the operation when printing on continuous recording paper having a normal thickness has been described. However, thick continuous recording paper (for example, a basis weight of 105 g / m2) is described.²When printing is performed as described above (a continuous weight of 90 kg or more), since the continuous recording paper moves zigzag in the states shown in FIGS. 5 and 6, the resistance during the movement of the continuous recording paper becomes too large. In the case of thick continuous recording paper, the stiffness of the fold is reduced only by making the fold substantially flat, so that the stiffness of the fold can be easily reduced. The fold can be straightened just by making it straight.
[0041]
Therefore, in the case of thick continuous recording paper, the lever 56 provided on the second pressing mechanism 32 is operated to move the first holding member 52a with respect to the second holding member 52b in the direction of the arrow. By turning, the second pointed member 51 is turned in the direction of arrow F, and the pressure of the continuous recording paper 3 by the second pointed member 51 is released.
[0042]
FIG. 7 is a diagram for explaining the operation when printing on thick continuous recording paper according to one embodiment of the present invention.
When printing on the continuous recording paper 3, the user looks at the thickness of the continuous recording paper 3 to be used. For example, when the thickness of the continuous recording paper 3 is d or more, as shown in FIG. The first holding member 52a is rotated by the lock mechanism 57 provided on the second holding member 52b to rotate the first holding member 52a by the second pointed member 51 of the second holding member 52b. Lock at the position where the pressurization is released When the first holding member 52a is locked at the position where the continuous recording paper 3 is released from the pressure applied by the second pointed member 51, the continuous recording paper 3 is moved to the first and second positions as shown in FIG. The path is changed to a path that does not contact the two pointed members 41 and 51. In the path shown in FIG. 7, the continuous recording paper 3 does not slide on the first and second pointed members 41 and 51, so that the resistance during movement can be reduced, and the paper can be supplied smoothly.
[0043]
In addition, since the bent portion of the thick continuous recording paper 3 is thick, it can easily follow the shape around the bent portion, the strength of the waist can be easily reduced along a straight path, and the bent portion can be corrected. .
As described above, according to the present embodiment, the continuous recording paper 3 is guided by the first and second pointed members 41 and 51 provided in front of the tractor 21 and conveyed zigzag. Can be bent in opposite directions, and the continuous recording paper 3 is guided by being slid by the pointed member, so that the bent portion of the continuous recording paper 3 can be reliably formed. I can correct it.
[0044]
Further, according to the present embodiment, since the application of the pressure to the continuous recording paper 3 can be released, the running resistance can be reduced when printing on the thick continuous recording paper 3 and the cutting of the continuous recording paper 3 can be prevented. it can.
Further, the second pointed member 51 can be easily retracted from above the path of the continuous recording paper 3 by releasing the lock mechanism 58 provided on the third holding member 52c. When the recording paper 3 is mounted, it is not necessary to insert the end of the continuous recording paper 3 between the first pointed member 41 and the second pointed member 51, and the first pointed member is After being mounted on the upper portion of the continuous recording paper 3, the second holding member 52 b only needs to be laid across the opening of the third holding member 52 c and locked by the lock mechanism 58. Mounting is possible.
[0045]
【The invention's effect】
As mentioned above,First inventionAccording to the first aspect, the recording sheet is pressed in one direction perpendicular to the recording surface by the first pointed member, and the portion bent in the other direction perpendicular to the recording surface of the recording sheet is reversed. The recording paper is pressed in the other direction perpendicular to the recording surface by the second pointed member, and is bent in one direction perpendicular to the recording surface of the recording paper. The bent part can be bent in the opposite direction to flatten the fold. At this time, since the first and second pointed members are provided in front of the sheet conveying device on the sheet path, the first and second pointed members are supplied to the sheet conveying device after the fold is corrected. The pointed member does not affect the conveyance of the sheet, so that the sheet can be satisfactorily conveyed and transferred. Further, since the recording paper slides on the first and second pointed members, the recording paper has such features that the crease can be reliably corrected.
[0046]
No.1And the secondThe first pointed member swings when the recording sheet is subjected to an unnecessarily large load by swinging the pointed member of the recording sheet in a direction orthogonal to the recording surface of the recording sheet. Since the pressure applied to the recording paper is kept substantially constant, it is possible to prevent the recording paper from being cut.
[0047]
Second inventionAccording to the first aspect, by providing the first retracting means, the first and second pointed members can be retracted to positions where the recording paper is not pressed, and special fold correcting means such as thick recording paper is required. In other words, when the load is excessively increased by passing through the correction means, the load can be reduced and printing can be performed without breaking the paper.
[0048]
PreviousA second retracting means for retracting the first pointed member and the second pointed member so that the recording paper transport path is opened;Make upThus, since the first and second pointed members can be retracted so that the recording paper transport path is opened, the paper path can be easily formed.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an image forming apparatus according to an embodiment of the present invention.
FIG. 2 is a configuration diagram of a continuous recording sheet used in one embodiment of the present invention.
FIG. 3 is a side view of the straightening device according to one embodiment of the present invention.
FIG. 4 is a diagram illustrating an operation of the straightening device of one embodiment of the present invention when continuous recording paper is mounted.
FIG. 5 is an explanatory diagram of an operation at the time of printing of the correction device according to the embodiment of the present invention.
FIG. 6 is an explanatory diagram of an operation at the time of printing of the correction device according to the embodiment of the present invention.
FIG. 7 is an explanatory diagram of an operation of the straightening device of one embodiment of the present invention at the time of printing operation on thick continuous recording paper.
[Explanation of symbols]
1 Image forming apparatus
2 Printing section
3 continuous recording paper
4 Transport section
11 Photosensitive drum
12 Charger
13 Optical unit
14 Developing device
15 Transfer device
16 Diffusion member
17 Fixing device
21 Tractor
22, 23 Guide member
24 Straightening device
31 First Pressing Mechanism
32 Second pressure mechanism
41 First pointed member
44 Coil spring
45 axes
51 second pointed member
52a first pointed member
52b second pointed member
52c Third pointed member
53, 54 axes
57, 58 Lock mechanism

Claims (4)

An image forming apparatus including a sheet conveying device that conveys a recording sheet and an image forming unit that forms an image on the recording sheet conveyed by the sheet conveying device.
A first point provided in front of the sheet transport device on the path of the recording sheet and pressing the recording sheet in one direction orthogonal to a recording surface of the recording sheet, and sliding the recording sheet; Shaped member,
The recording sheet is provided in front of the sheet transport device on the path of the recording sheet, and presses the recording sheet in a direction opposite to the one direction orthogonal to a recording surface of the recording sheet, and the recording sheet is slid. second possess a pointed member that,
The first pointed member is provided closer to the sheet transport device than the second pointed member, and the first and second pointed members are pointed portions in contact with the recording sheet. An image forming apparatus , wherein the pointed portion of the second pointed member has a larger bending radius than the pointed portion of the first pointed member . An image forming apparatus including a sheet conveying device that conveys a recording sheet and an image forming unit that forms an image on the recording sheet conveyed by the sheet conveying device.
A first point provided in front of the sheet transport device on the path of the recording sheet and pressing the recording sheet in one direction orthogonal to a recording surface of the recording sheet, and sliding the recording sheet; Shaped member,
The recording sheet is provided in front of the sheet transport device on the path of the recording sheet, and presses the recording sheet in a direction opposite to the one direction orthogonal to a recording surface of the recording sheet, and the recording sheet is slid. A second pointed member,
Have a first retracting means for retracting said first tine member and the second tine members the recording paper unpressurized position, the first tine member and the second tines images forming device you characterized in that the recording sheet member in pressureless position and can be conveyed to the recording paper. Said first tine member and the second tine member, the image of claim 1, wherein a mounted for swinging in a direction perpendicular to the recording surface of the recording sheet Forming equipment. 4. The printing apparatus according to claim 1, further comprising: a second retracting unit that retracts the first pointed member and the second pointed member so that a recording paper transport path is opened. An image forming apparatus according to any one of the preceding claims.

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