JP5935564B2 - Conveying device, image forming apparatus - Google Patents

Description

  The present invention relates to a conveyance device and an image forming apparatus.

  Patent Document 1 describes an image forming apparatus that forms an image on continuous paper. The image forming apparatus includes a drive roller unit disposed on the downstream side of a recording unit that records images on continuous paper, and a back tension roller unit disposed on the upstream side of the recording unit. In the tension roller portion, the continuous paper is sandwiched with a smaller pinch pressure when moving forward than when moving backward.

Japanese Patent Laid-Open No. 2005-262738

  SUMMARY OF THE INVENTION An object of the present invention is to suppress scratches generated on a continuous paper sheet due to the position correction of the continuous paper sheet in a direction orthogonal to the conveyance direction of the continuous paper sheet.

The conveying device according to claim 1 of the present invention is arranged on the upstream side in the conveying direction of the continuous paper with respect to the applying member in the conveying path of the continuous paper and an applying member that applies a conveying force to the continuous paper A curved member that is curved as viewed from an orthogonal direction orthogonal to the transport direction and that forms a curved surface that contacts the continuous paper, and is disposed on one side of the orthogonal direction with respect to the curved member, A plurality of abutting members that abut edges of the continuous paper to be conveyed and a plurality of openings arranged side by side in the orthogonal direction so that a part protrudes from the plurality of openings formed in the curved surface toward the conveyance path And each rotating shaft is inclined with respect to the orthogonal direction, rotates while contacting the continuous paper on the outer peripheral surface, and abuts the edge against the abutting member, and the rotating shaft direction on the outer peripheral surface. The center side of the Characterized in that it and a rotary member that is.

  The transport apparatus according to claim 2 of the present invention is the transport apparatus according to claim 1, wherein the outer peripheral surface is curved in a cut surface cut along the rotation axis.

  According to a third aspect of the present invention, in the conveying device according to the second aspect, the outer peripheral surface of the conveying device cut along the rotating shaft has an arc shape.

  According to a fourth aspect of the present invention, there is provided an image forming apparatus comprising: the conveying device according to any one of the first to third aspects; and a conveying path provided in the conveying device, the connecting member with respect to the bending member. An image forming member disposed on the downstream side in the conveyance direction of the book and forming an image on the conveyed continuous paper.

  According to the conveying device of the first aspect of the present invention, the continuous member is caused by the position correction of the continuous paper in the direction orthogonal to the continuous paper conveying direction as compared with the case where the rotating member is cylindrical. Scratches generated on the book can be suppressed.

  According to the conveying device of the second aspect of the present invention, scratches generated on the continuous paper compared to the case where the corner portion is formed on the outer peripheral surface of the rotating member in the cut surface cut along the rotation axis. Can be suppressed.

  According to the conveying device of the third aspect of the present invention, the rotating member can be easily manufactured as compared with the case where the outer peripheral surface is a curved shape composed of a plurality of Rs on the cut surface cut along the rotation axis. can do.

  According to the image forming apparatus of the fourth aspect of the present invention, it is possible to suppress the deterioration of the quality of the output image as compared with the case where the conveying apparatus according to any one of the first to third aspects is not provided. it can.

It is sectional drawing which showed the skew roll employ | adopted as the correction mechanism which concerns on embodiment of this invention. 1 is a diagram illustrating a correction mechanism according to an embodiment of the present invention. It is the perspective view which showed the correction mechanism which concerns on embodiment of this invention. It is sectional drawing which showed the correction mechanism which concerns on embodiment of this invention. 1 is a schematic configuration diagram illustrating an image forming apparatus according to an embodiment of the present invention.

  An example of a transport apparatus according to an embodiment of the present invention and an image forming apparatus including the transport apparatus will be described with reference to FIGS.

(overall structure)
As shown in FIG. 5, the image forming apparatus 10 has an image forming unit 12 as an example of an image forming member that forms a toner image on a long continuous paper P to be conveyed, and an image forming unit 12. The fixing unit 14 is disposed on the downstream side in the conveyance direction of the continuous paper P, and heats and fixes the toner image formed on the continuous paper P. The downstream side in the conveyance direction of the continuous paper P with respect to the fixing unit 14 And a continuous paper that passes through the image forming unit 12 and is disposed upstream of the image forming unit 12 in the conveying direction of the continuous paper P. And a feeding unit 18 that applies tension to P and corrects the positional deviation of the continuous paper P in the direction (main scanning direction) orthogonal to the conveyance direction of the continuous paper P. Further, the image forming apparatus 10 includes a plurality of conveyance guides 48 that guide the continuous paper P along the conveyance path 50 of the continuous paper P.

  The image forming apparatus 10 includes a housing 22 and a housing 24 as an example of an apparatus main body. The image forming unit 12 and the sending unit 18 are provided inside the housing 22, the fixing unit 14, and the transport unit 16. Is disposed inside the housing 24.

  The transport device 20 that transports the continuous paper P is configured to include a transport unit 16 and a sending unit 18. Details of the sending unit 18 will be described later.

(Image forming part)
The image forming unit 12 includes a cylindrical image carrier 28 that rotates in the direction of arrow B in the figure, a charging roller 30 that charges the image carrier 28, and a downstream of the charging roller 30 in the rotational direction of the image carrier 28. An image forming member formed on the image holding member on the downstream side in the rotation direction of the image holding member with respect to the exposure member. A developing member 34 that develops the electrostatic latent image as a toner image with toner, and a toner image formed on the image holding body 28 downstream of the developing member 34 in the rotation direction of the image holding body 28 A transfer member 36 for transferring to the surface.

  The transfer member 36 is disposed so as to face the image holding member 28, and a transfer position T where the toner image is transferred to the continuous paper P is between the image holding member 28 and the transfer member 36.

  Further, the image forming unit 12 has an elliptical shape in a side view arranged on the upstream side and the downstream side in the conveyance direction of the continuous paper P with respect to the transfer position T so that the continuous paper P passes the transfer position T. A plurality of guide members 38 are provided. The guide member 38 is in contact with the back surface of the continuous paper P so that the continuous paper P passes the transfer position T.

[Fixing part]
The fixing unit 14 includes a plurality of flash lamps 40 extending in a direction orthogonal to the conveyance direction of the continuous paper P and arranged in the conveyance direction of the continuous paper P. The flash lamp 40 is disposed in a non-contact manner so as to face the surface of the continuous paper P. When the toner image passes through a position facing the flash lamp 40, the flash lamp 40 that fixes the toner image to the continuous paper P is turned on.

[Transport section]
The conveyance unit 16 receives a rotational force from a motor (not shown) and rotates in a direction indicated by an arrow C in the drawing to apply a conveyance force to the continuous paper P. A pinch roll 46 that is arranged on the upper side in the drawing and sandwiches the continuous paper P between the driving roll 42 and a pinch roll 46 that is arranged on the right side (fixing unit 14 side) of the driving roll 42 in the drawing and is connected to the driving roll 42. And a winding roll 44 that regulates the amount of winding.

(Operation of the overall configuration)
Next, an image forming operation for forming an image on the continuous paper P using the image forming apparatus 10 will be described.

  With the start of the image forming operation, the driving roll 42 rotates and the continuous paper P is conveyed along the conveyance path 50.

  On the other hand, in the image forming unit 12 with the start of the image forming operation, the image carrier 28 rotates in the direction of arrow B, and the charging roll 30 charges the surface of the rotating image carrier 28. Further, the exposure member 32 exposes the charged image carrier 28 to form an electrostatic latent image on the surface of the image carrier 28.

  The developing member 34 develops the electrostatic latent image formed on the surface of the image carrier 28 and visualizes it as a toner image. Further, the transfer member 36 transfers the toner image formed on the surface of the image carrier 28 to the surface of the continuous paper P that passes through the transfer position T.

  In the fixing unit 14, the flash lamp 40 irradiates light toward the surface of the continuous paper P to which the toner image is transferred, heats the toner image, and fixes the toner image to the continuous paper P. The continuous paper P on which the toner images are fixed passes through the transport unit 16 and is discharged to the outside of the image forming apparatus 10. Thus, a series of image forming operations is completed.

(Main part configuration)
Next, the sending unit 18 will be described.

  The feeding unit 18 is in contact with the back surface of the continuous paper P and applies a tension to the continuous paper P, and the conveyance direction of the continuous paper P with respect to the tension applying roll 56 (hereinafter referred to as “sub-scanning direction”). And a correction mechanism 58 that corrects the positional deviation of the continuous paper P in a direction orthogonal to the sub-scanning direction (hereinafter referred to as “main scanning direction”). ing.

[Correction mechanism]
As shown in FIGS. 3 and 4, the correction mechanism 58 is a curved plate-like curved member that is curved when viewed from the main scanning direction and has a curved surface 60A that contacts the surface of the continuous paper P. A curved guide 60 as an example, and a side guide 64 as an example of a fan-shaped butting member attached to one end of the curved guide 60 in the main scanning direction and against which an edge of the continuous paper P is abutted. Yes. A rectangular opening 60B as an example of a plurality of openings arranged in the main scanning direction is formed on the center side in the sub-scanning direction on the curved surface 60A.

  Further, the correction mechanism 58 is arranged so that a part thereof protrudes from each rectangular opening 60B to the continuous paper P side (conveying path 50 side), and is a rotating member that is rotatably supported by a frame member (not shown). A skew roll 62 is provided as an example.

  When viewed from a direction orthogonal to the curved surface 60A of the portion where the rectangular opening 60B is formed (viewed from the normal direction), as shown in FIG. 2, the rotation shaft 62A of the skew roll 62 is in the main scanning direction. It inclines with respect to the direction (arrow D direction in the figure). In this configuration, when the outer peripheral surface 62B of the skew roll 62 comes into contact with the surface of the conveyed continuous paper P, the skew roll 62 rotates and the edge of the conveyed continuous paper P becomes the side guide 64. It comes to be hit.

  Further, when the skew roll 62 is cut along the rotation shaft 62A, as shown in FIG. 1, the cross-sectional shape of the outer peripheral surface 62B of the skew roll 62 is such that the center side in the rotation shaft direction protrudes radially outward. It has an arc shape. Thereby, the corner | angular part 62D which the side surface 62C and the outer peripheral surface 62B of the skew roll 62 contact, and the surface of the continuous paper P are prevented from contacting.

(Effects of main components)
Next, the operation of the main configuration will be described.

  Along with the image forming operation by the image forming apparatus 10, the drive roll 42 rotates and transports the continuous paper P along the transport path 50. Further, the tension applying roll 56 applies tension to the continuous paper P, and the continuous paper P to which tension is applied is conveyed while being in contact (pressed) with the curved surface 60A of the curved guide 60.

  When the continuous paper P passes through the curved surface 60A, the outer peripheral surface 62B of the skew roll 62 comes into contact with the surface of the conveyed continuous paper P, and the skew roll 62 rotates. As the skew roll 62 rotates, the edge of the conveyed continuous paper P is abutted against the side guide 64. Thereby, the positional deviation of the continuous paper P in the main scanning direction is corrected.

  Here, when the skew roll 62 rotates by the outer peripheral surface 62B coming into contact with the surface of the continuous paper P, the cross-sectional shape of the outer peripheral surface 62B is an arc as shown in FIG. Therefore, as described above, the corner 62D and the surface of the continuous paper P do not contact each other.

  Thereby, as compared with the case where the corner 62D and the continuous paper P are in contact with each other, scratches generated on the continuous paper P due to the position correction of the continuous paper P in the main scanning direction are suppressed.

  Further, since the scratches generated on the continuous paper P are suppressed, the deterioration of the output image quality by the image forming apparatus 10 is suppressed.

  Moreover, since the cross section of the outer peripheral surface 62B is made into circular arc shape, the skew roll 62 is manufactured easily compared with the case where the cross section of an outer peripheral surface is the curve shape comprised from several R, for example. .

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments can be taken within the scope of the present invention. This will be apparent to those skilled in the art. For example, the case where the corner portion 62D and the surface of the continuous paper P are not in contact has been described as an example. However, the corner portion 62D and the continuous paper P may be in contact with each other. The contact pressure with the surface may be reduced as compared with the case where the skew roll is cylindrical.

  Moreover, in the said embodiment, although the cross-sectional shape of the outer peripheral surface 62B was made into circular arc shape, it is not specifically limited to circular arc shape, What is necessary is just curved shape. In this case, as compared with the case where corners are formed in the cross section of the outer peripheral surface, scratches generated on the continuous paper P are suppressed.

  In the above-described embodiment, the cross-sectional shape of the outer peripheral surface 62B is an arc shape, but is not particularly limited to an arc shape, and the center side in the rotation axis direction on the outer peripheral surface protrudes radially outward with respect to the end side. That's fine. In this case, the corner of the skew roll is prevented from contacting the surface of the continuous paper P. For this reason, the damage | wound which generate | occur | produces on the continuous paper P is suppressed compared with the case where a skew roll is cylindrical. For example, R may be formed at the corner of a cylindrical roll, and a chamfer may be formed at the corner of the cylindrical roll.

  In the above embodiment, the tension applying roll 56 has not been specifically described. However, an opposing roll is disposed so as to face the tension applying roll 56, and the tension applying roll 56 is used for the opposing roll. P may be pinched to apply tension to the continuous paper P.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 12 Image forming part (an example of image forming member)
20 Conveying device 42 Driving roll (an example of an applying member)
50 Conveyance path 60 Curved guide (an example of a curved member)
60A Curved surface 60B Rectangular opening (an example of opening)
62 Skew roll (example of rotating member)
62A Rotating shaft 62B Outer peripheral surface 64 Side guide (an example of a butting member)

Claims (4)

An imparting member for imparting a conveying force to the continuous paper;
A curved surface that is arranged on the upstream side in the conveyance direction of the continuous paper with respect to the application member in the conveyance path of the continuous paper, and is curved as viewed from an orthogonal direction orthogonal to the conveyance direction and contacts the continuous paper A curved member formed with:
An abutting member that is disposed on one side in the orthogonal direction with respect to the bending member, and against which an edge of the continuous paper to be conveyed is abutted,
A plurality of arrangements are arranged in the orthogonal direction so that a part protrudes from the plurality of openings formed in the curved surface to the conveyance path side, and each rotation axis is inclined with respect to the orthogonal direction, A rotating member that rotates while in contact with the continuous paper, abuts the edge portion against the abutting member, and a central side of the outer peripheral surface in the rotational axis direction projects radially outward with respect to the end side. When,
A transport apparatus comprising:   The conveying apparatus according to claim 1, wherein the outer peripheral surface is curved in a cut surface cut along the rotation axis.   The conveying apparatus according to claim 2, wherein the outer peripheral surface has an arc shape in a cut surface cut along the rotation axis. A transport apparatus according to any one of claims 1 to 3,
An image forming member that is disposed downstream of the curved member in the transport direction of the continuous paper and forms an image on the transported continuous paper in the transport path provided in the transport device;
An image forming apparatus comprising:

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