JPS5910973A - Transferring and separating device - Google Patents

Abstract

PURPOSE:To guide a sheet securely during separation, by forming such a flexible thin plate that its one end surface is interposed between an image carrier and the sheet to which an image is transferred and the other end overlaps a conveyance member. CONSTITUTION:One end side of a separating tape 6 as the flexible thin plate constituting a separating member 6' is in sliding contact with a part of transfer roll 2 where a transfer roll 2 is not in rolling contact with the photoreceptor 1, and interposed between one end part of copying paper P and the photoreceptor 1. A part of the circumferential wall of a lever 15 is in rolling contact with the separating tape 6 elastically, so the separating tape 6 overlaps an edge feeding roll 12 and an auxiliary edge feeding roll 13. Consequently, the copying paper P is guided securely from the photoreceptor 1 to the edge feeding roll 12 and auxiliary edge feeding roll 13 by the separating tape 6 and passed from the separating tape 6 to the edge feeding roll 12 and auxiliary edge feeding roll 13 securely, and the front edge of the copying paper P is guided securely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a transfer and peeling device used, for example, in an electronic copying machine.

[Technical background of the invention and its problems]

For example, in an electronic copying machine, a transfer separation device is used that transfers an original image formed on a photoreceptor (image carrier) onto copy paper (sheet), and then peels the transfer paper on which the original image has been transferred from the photoreceptor. It is being

By the way, in this transfer peeling device, a release tape is interposed between the photoreceptor and the transfer paper to peel the transfer paper from the photoreceptor, and the peeled copy paper is sent to a post-processing section using a conveyance roller or the like. ing.

However, the release tape peels the copy paper from the photoreceptor with its elasticity at a distance from the transfer position, and has a conveyance path composed of lower conveyance rollers, etc. There was a risk that a mistake would occur in guiding the copy paper to the other person.

[Purpose of the invention]

The present invention has been made based on the above Hri 4i situation, and its object is to provide a transfer and peeling device that can reliably guide a sheet during peeling.

[Summary of the invention]

The present invention provides a transfer and peeling device for transferring an image formed on an image bearing member onto a sheet and peeling off the sheet onto which the image has been transferred from the image bearing member, the image bearing member and the sheet having the transferred image. a peeling member that is interposed between the image bearing member and peels the sheet having the transferred image from the image carrier, and a conveying member that conveys the sheet peeled off by the peeling member, and the peeling member has one end attached to the a flexible thin plate that is close to the image carrier and has its other end in contact with the conveying member; the flexible thin plate is interposed at one end between the image carrier and the sheet to which the image is transferred; Furthermore, a portion of the other end is overlapped with the conveying member.

[Embodiments of the invention] Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 and 2 show the main parts of an electronic copying machine. Reference numeral 1 denotes a photoreceptor as an image carrier formed in the shape of a drum and rotated in the direction of the arrow in the figure. Around the photoreceptor 1, a charging device, an exposure device, a developing device, a cleaning device, and a transfer device 2 and a conveying device 20, which will be described later, are arranged. The transfer device 2 is a transfer roller, and as shown in FIG. 3, a rotating shaft 4 whose both ends are elastically lifted by tension springs 3.3 is fitted onto the peripheral wall of the rotating shaft 4. It consists of an elastic member 5. These rotating shaft 4 and elastic member 5 are 4
An electric type is selected so that a specified voltage can be applied safely. The elastic member 5 is in rolling contact with the photoconductor 1 except for one end, and cannot clamp one end in the width direction (8 dimensions) of the copy paper P, which is the sheet to be sandwiched between them. Become. One end side of a peeling tape 6, which is a flexible thin plate made of Mylar (trade name), for example, which constitutes the peeling member 6', is in sliding contact with the portion where the transfer roller 2 does not come into rolling contact with the photoreceptor 1. It can be interposed between one end of the copy paper P and the photoreceptor 1.

As shown in FIGS. 1 and 2, one end of the release tape 6 is fixed close to the photoreceptor 1, and the other end is attached to a pin 7 protruding into the copying machine main body A via a tension spring 8. It will be stretched. A rectangular through hole 9 is formed at a predetermined distance from the part of the release tape 6 where the photoconductor 1 slides in the direction of conveyance of the copy paper P. 2 and is placed on the copy paper P delivery side. That is, directly below the through hole 9 and parallel to the axial direction of the photoreceptor 1, a driven shaft 10 is rotatably supported.

This driven shaft 10 has a substantially drum-shaped driven roller 1 .

11 is fitted. Furthermore, an edge feed roller 12 as a conveyance member is fitted to one end of the driven +1I110. The diameter of one page of the edge feed roller I2 is slightly larger than the maximum diameter of the driven roller 11 mentioned above. An auxiliary feed roller 13 serving as a conveying member is inserted into the through hole 9, and rolls into contact with the edge feed roller Z2. That is, the copying machine main body A is provided with a lever 15 that is elastically biased to rotate downward by a tension spring 14, and
3 is rotatably supported at the end of this lever 15. In addition, since a part of the peripheral wall of the lever 15 elastically contacts the release tape 6, the release cheese 6 eventually contacts the photoreceptor I and the lever 15 at two points, and a part of the peripheral wall of the lever 15 is moved to the edge at the other end. It overlaps with the roller and the auxiliary feed roller 13. It is still separated from the driven shaft 10,
And drive Il in parallel with this! 1I116 is pivoted.

This drive shaft 16 is connected to a drive machine +19 (not shown) and can be driven to rotate in the direction of the arrow in the figure. Drive rollers 17, 17 having substantially the same shape as the driven rollers 11.11 are mounted on the drive shaft 16 at positions facing the driven rollers 11.11. Then, an endless stepper (18.18) is wrapped around each drive roller 17, 17 and driven roller 11°1, and the drive Mb4Q
By rotating stepwise movement of ll16, it runs endlessly in the direction of the arrow in the figure. Note that since the conveyor belts 18 and 18 are wrapped around the driven rollers 11, 11, the diameter of this portion becomes approximately equal to the diameter of the edge feed roller 12. Second
Reference numeral 19 and 19 shown only in the figure are guide plates for the copy paper P. 1
Copy paper P is then fed from a paper feeding device (not shown) and is held between photoreceptor 1 and transfer roller 2 with one end remaining. Photosensing at the same time as this! The original image formed on the peripheral wall 4-1 faces the copy paper P. At the same time, a necessary voltage is applied to the transfer roller 2, and the original image on the photoreceptor 1 is transferred to the copy paper P. One end of the copy paper P is covered with a release tape 6
The photoreceptor 1 and the transfer roller 2 are rotated, and the photoreceptor 1 is conveyed along the release tape 6 as it is. Then, it is peeled off from the photoreceptor 1 and guided to the conveying device 20. Drive shaft 1
Reference numeral 6 runs the conveyor belts 1B and IB endlessly in the direction of the arrow in the figure, and thereby rotationally drives the edge feed roller 12 and the auxiliary feed roller 13 in the direction of the arrow in the figure.

One end of the copy paper P is held between an edge feed roller 12 and an auxiliary feed roller 13, and is transported reliably without skew. The remaining portion is placed on a conveyor belt 18.18 and is conveyed to face a fixing device (not shown).

According to the above configuration, the copy paper P is reliably guided from the photoreceptor 1 to the edge feed roller 12 and the auxiliary feed roller 13 by the release tape 6.

In addition, since the release tape 6 partially overlaps with the edge feed roller 12 and the auxiliary feed roller 13, the release tape 6 overlaps the edge feed roller 12 and the auxiliary feed roller 1.
3, and the leading edge of the copy paper P can be guided reliably.

In the above embodiment, the driven shaft 1o is pivotally supported at a portion directly below the through hole 9 of the release tape 6, and the lug feed roller 1 is attached to the driven shaft 1o.
2 is fitted therein, but the present invention is not limited thereto, and the drive shaft I6 may be pivotally supported, and the lug feed roller 12 may be fitted on this drive shaft 16.

Furthermore, it goes without saying that the present invention is applicable not only to electronic copying machines, but also to all devices that require sheet peeling. .

〔Effect of the invention〕

As explained above, according to the present invention, in a transfer separation device that transfers an image formed on an image carrier onto a sheet and peels the sheet to which the image is transferred from the image carrier, the image carrier and the a peeling member that is interposed between the sheet having the transferred image and peels the sheet having the transferred image from the image carrier; and a conveying member that conveys the sheet peeled off by the peeling member, the peeling member is provided with a flexible thin plate having one end close to the image carrier and the other end contacting the conveying member, and the flexible thin plate is connected at one end to the -E image carrier and the sheet to which the image is transferred. Since the sheet is interposed between the flexible thin plate and the other end thereof is partially overlapped with the conveying member, the sheet is reliably guided from the image carrier to the conveying member by the flexible thin plate. By partially overlapping with the conveying member, excellent effects such as ensuring reliable delivery from the flexible thin plate to the conveying member and reliably guiding the leading edge of the sheet can be achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a perspective view of a nip section of an electronic copying machine equipped with a sheet conveying device, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a front view thereof. DESCRIPTION OF SYMBOLS 1... Image carrier (photoreceptor), P... Sheet (copy paper), 6'... Peeling member, 6... Flexible thin plate (peeling tape), 12... Conveying member ( selvedge feed roller), 13.
... Conveyance member (auxiliary feed roller).

Claims (1)

[Claims] In an apparatus in which an image formed on an image carrier is transferred to a sheet, and the sheet to which this image is transferred is peeled off from the carrier,
-F A peeling member that is interposed between the storage carrier and the sheet having the transferred image and peels off the sheet having the transferred image from the one-image carrier, and a conveyance member that conveys the peeled sheet by the peeling member. The self-peeling member includes a flexible thin plate having one end close to the image carrier and the other end contacting the conveying member; A transfer separation device characterized in that a constant thin plate is interposed between the image carrier and the sheet to which the image is transferred at one end thereof, and a part of the constant thin plate is overlapped with the conveying member at the other end thereof. .