JPH072348U - Paper skew correction device for electrophotographic device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Make it easy to replace the stopper member,
(EN) Provided is a paper skew correction device having excellent maintainability. A protrusion 6a for mounting a stopper member 9 is provided on a side surface portion of a belt member 6, and the stopper member 9 is detachably attached to the protrusion portion 6a. At least a side surface portion of the stopper member 9 on which the print sheet 4 abuts. An elastic piece 9b is provided to prevent the printing paper from entering the engaging portion d between the belt member 6 and the stopper member 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper skew correction device for an electrophotographic apparatus.

[0002]

[Prior art]

 In the past, in electrophotographic devices such as copiers and laser printers, the transfer position of the printing paper is adjusted in the correct direction by correcting the running posture of the printing paper before transferring the toner image formed on the photoconductor to the printing paper. I am sending it to.

For example, as shown in FIG. 4, the printing paper 4 sent onto the paper carrying belt 1 once comes into contact with the stopper 12 before being sent to the carrying roll 10 so that the leading end position of the printing paper 4 is carried. After being corrected so as to be substantially orthogonal to the direction, it is conveyed to the conveying roll 10 side.

[0004]

[Problems to be solved by the device]

 In the prior art, the stopper 12 is integrally provided on the side surface of the belt 11 as shown in FIG. 4, so that when the stopper 12 is worn by the contact of the printing paper 4, the entire belt 11 must be replaced. It lacked maintainability.

An object of the present invention is to provide a paper skew correction device that facilitates replacement of a stopper member and has excellent maintainability.

[0006]

[Means for Solving the Problems]

 The above object is to provide a protrusion for mounting a stopper member on the side surface of the belt member, and to dispose the stopper member detachably with respect to the protrusion, and at least on the side surface of the stopper member on the side where the printing paper contacts. This is achieved by providing an elastic piece that prevents the printing paper from entering the engaging portion between the belt member and the stopper member.

[0007]

[Action]

 According to the present invention, it is possible to provide a paper skew correction device having excellent maintainability.

[0008]

【Example】

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

In FIG. 1, the paper transport belt 1 is stretched over a drive roller 2 and a driven roller 3, and is configured to transport the print paper 4 on the paper transport belt 1 in the direction of arrow a.

The sheet skew correction device 5 provided on the downstream upper side of the sheet conveying belt 1 has a belt member 6, a driving roller 7 and a driven roller 8 that support the belt member 6, and a belt member 6. The stopper member 9 is detachably provided.

The sheet skew correction device 5 temporarily skews the front end of the printing sheet 4 conveyed on the upper surface of the sheet conveying belt 1 to the stopper member 9 to correct the skew, and then moves the belt member 6 in the direction of arrow b. It is controlled so that the stopper member 9 is temporarily removed from the sheet conveying path by driving the sheet to the conveying roll mechanism 10 side.

Next, the relationship between the belt member 6 and the stopper member 9 will be described with reference to FIG.

A protrusion 6 a is formed on the side surface of the belt member 6, and a recess 6 b that functions as positioning of a stopper member 9 described later is provided on the side surface of the protrusion 6 a.

On the other hand, the stopper member 9 is formed in a U shape so as to sandwich the protrusion 6 a formed on the belt member 6, and the inner wall surface of the stopper member 9 engages with the recess 6 b provided on the protrusion 6 a. A matching convex portion 9a is provided.

Further, an elastically deformable elastic piece 9b having a thickness of about 0.2 mm or less is provided on the side surface of the stopper member 9 on the side where the printing paper comes into contact, as shown in FIG. Thus, when the stopper member 9 is attached to the belt member 6, the elastic piece 9b prevents the printing paper 4 from entering the gap d generated between the stopper member 9 and the belt member 6.

[0016]

[Effect of device]

 According to the present invention, since the stopper member is detachably attached to the belt member, it is possible to easily replace the stopper member and to provide a paper skew correction device having excellent maintainability.

Since the elastic piece for preventing the printing paper from entering the engaging portion between the belt member and the stopper member is provided on the side surface portion of the stopper member on the side where the printing paper comes into contact, the stopper member and the belt. It is possible to realize stable conveyance of printing paper without causing obstacles and the like due to the divided structure of the members.

[Brief description of drawings]

FIG. 1 is a side view of a sheet conveyance system including a sheet skew correction device according to the present invention.

FIG. 2 is a side view of essential parts showing the configurations of a belt member and a stopper member of the present invention.

FIG. 3 is a side view of an essential part showing a mounted state of a stopper member of the present invention.

FIG. 4 is a side view of a sheet conveyance system including a conventional sheet skew correction device.

[Explanation of symbols]

6 is a belt member, 6a is a protrusion, 6b is a recess, 9 is a stopper member, 9a is a protrusion, and 9b is an elastic piece.

Claims (1)

[Scope of utility model registration request] 1. A stopper member is provided so as to project on a side surface portion of a belt member spanned by a roll member, and the front end of the printing paper is brought into contact with the side surface of the stopper member by allowing the stopper member to exist in a paper conveyance path. In the paper skew correction device of the electrophotographic apparatus that corrects the running posture of the printing paper by providing a protrusion for mounting the stopper member on the side surface portion of the belt member, the stopper member is detachably attached to the protrusion. A paper for an electrophotographic apparatus, characterized in that at least a side surface of the stopper member on which the printing paper abuts is provided with an elastic piece for preventing the printing paper from entering the engaging portion between the belt member and the stopper member. Skew correction device.