JPS5910976A - Transferring and separating device - Google Patents

Abstract

PURPOSE:To separate a sheet securely by extending a separating member in the conveyance direction of the sheet and supporting the separating member at a more spaced position from an image carrier at the downstream side than at the position where the image carrier and sheet are close to each other. CONSTITUTION:A separating tape 6 extends in the conveyance direction of copying paper P; its upstream end side is fixed and the downstream end side is hooked through a tension spring 8 to a pin 7 projecting from a copying machine body A, energizing the downstream side downward elastically. Further, the tape is supported at a more spaced position from a photoreceptor 1 at the downstream side than at a transfer position, i.e. where the photoreceptor 1 and copying paper P are close to each other with the separating tape 6 between. Consequently, the copying paper P separates from the photoreceptor 1 more and more as it separates from the transfer position more and more while the copying paper P is guided, and the copying paper P is shifted in position forcibly to the lower side, i.e. the conveyance path side composed of the conveyance device 10, separating the paper P securely.

Description

DETAILED DESCRIPTION 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, this transfer peeling device peels the transfer paper from the photoreceptor by interposing a peeling chip at the side end portion between the photoreceptor and the transfer paper.

Skiing is prevented by pinching and conveying the peeled edge of the copy paper, that is, the vicinity of the edge edge, by a refeed roller and an auxiliary refeed roller that rolls into contact with the refeed roller.

However, since the release tape peels the copy paper from the photoreceptor at a position away from the transfer position and transfers it to the conveyance path below, there is a risk of a peeling error occurring.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and its purpose is to guide the sheet so that it is separated from an image carrier as the sheet moves away from the transfer position, and to forcibly convey the position of the sheet. It is an object of the present invention to provide a transfer and peeling device which can be moved to the roadside and thereby ensure peeling.

[Summary of the invention]

The present invention transfers an image formed on an image carrier to a sheet,
In a transfer peeling device that peels off the sheet onto which this image has been transferred from the image carrier, a peeling device that is interposed between the image carrier and 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 by contacting near the edge of the sheet peeled by the peeling member, the peeling member extending along the conveying direction of the sheet, and the peeling member The downstream side of the member along the sheet conveyance direction is supported through the peeling member so that a portion where the image carrier and the sheet are close to each other is also spaced apart from the image carrier. It is.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to 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. 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 around the photoreceptor. 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 selected to be electrically conductive so that a predetermined voltage can be applied when necessary. The elastic member 5 is in rolling contact with the photoreceptor 1 except for one end, and cannot pinch one end in the width direction (S dimension) of the copy paper P, which is the sheet to be sandwiched between them. become. Transfer roller 2 is photoreceptor 1
A peeling chip f6 as a peeling member made of Mylar (trade name), for example, is in sliding contact with the portion that is not in rolling contact with the photoreceptor 1 and can be interposed between one end of the copy paper P and the photoreceptor 1. . As shown in FIGS. 1 and 2, this peeling section extends along the conveyance direction of the copy paper P, and its upstream end is fixed. Further, its downstream end is tensioned via a tension spring 8 to a bottle 7 protruding from the main body A of the copying machine, so that the downstream end is elastically biased toward the downstream side. The downstream side along the conveyance direction of the copy paper P is the transfer position, that is, the photoreceptor 1 via the peeling roller.
The adjacent portions of the copy paper P and the copy paper P are also supported so as to be spaced apart from the photoreceptor. A rectangular through hole 9 is formed at a predetermined distance from the part of the peeling hole where the photoreceptor 1 slides in the direction of conveyance of the copy paper P.

The conveyance device 20 is arranged on the copy paper P output side between the photoreceptor 1 and the transfer roller 2. 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.

A substantially drum-shaped driven roller 11° is fitted onto the driven shaft 10. As shown in FIG. Further, a re-feed roller 12 as a conveyance member is fitted to one end of the driven shaft 10. The diameter of the edge feed roller 12 is slightly larger than the maximum diameter of the driven roller 1. An auxiliary refeeding roller 13 as a conveying member is inserted into the through hole 9 and comes into rolling contact with the refeeding roller 12 . That is, the copying machine main body A includes a lever 1 which is elastically biased to rotate downward by a tension spring 14.
5, and the auxiliary refeed roller 13 is rotatably supported at the end of this lever 15. Then, it rolls into contact with the edge feed roller 12 through the through hole 9, whereby the peeling chisel engages with the auxiliary edge feed roller 13, and the movement of the copy paper P in the direction intersecting the conveyance direction is restricted. It looks like this. Moreover, since a part of the peripheral wall of the lever 15 elastically contacts the peeling tip 7, the peeling tip 7 ends up being in contact with the peeling tip 7.
06, the photoreceptor 1 and the lever 15 come into rolling contact at two points. Further, a drive shaft 16 is pivotally supported apart from and parallel to the driven shaft 10. This drive shaft 16 is connected to a drive mechanism (not shown) and can be rotated in the direction of the arrow in the figure. At a position on the drive shaft 16 facing the driven rollers 11, 11, there is a drive roller 17 having the same shape as the driven rollers.
17 is fitted. An endless conveyor belt 18.18 is connected to each drive roller 12.17 and driven roller 11.11.
is suspended, and driven by rotation of a drive shaft 160, it runs endlessly in the direction of the arrow in the figure. In addition, driven roller 1
1 and 11 with conveyor belts 18 and 18.

The diameter of this portion is approximately equal to the diameter of the edge feed roller 12. Reference numeral 19.19 shown only in FIG. 2 is a guide plate for the copy paper P.

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. Coincident with this, the original image formed on the peripheral wall of the photoreceptor 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 comes into sliding contact with the release tape 6, and is conveyed as it is along the release tape 6 as the photoreceptor 1 and transfer roller 2 rotate. Then, it is peeled off from the photoreceptor 1 and guided to the conveying device 2θ. The drive shaft 16 runs the conveyor belt 18, 18 endlessly in the direction of the arrow in the figure, and thereby rotationally drives the 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 elastically held between an edge feed roller 12 and an auxiliary feed roller 13, and is reliably conveyed without skew. The remaining parts are conveyor belts 1B and 1B.
The paper is placed on top of the paper and is conveyed to face a fixing device (not shown).

According to the above configuration, the peeling chip 7°6 extends along the conveyance direction of the copy paper P, and the downstream side of the release tape 6 of the parentheses along the copy paper conveyance direction is also attached to the transfer site. Therefore, as the copy paper P moves away from the transfer position, the copy paper P is guided so as to be separated from the photoreceptor 1, and the position of the copy paper P is forced to the lower side, that is, the conveyance device 2o. Since it can be shifted toward the conveyance path formed by

Further, since the peeling chip f6 is engaged with the auxiliary edge feed roller 13, it is possible to prevent the peeling chip from shifting in the lateral direction.

Further, since the peeling chip f6 fixedly holds the upstream side of the copy paper P along the conveying direction and elastically urges the downstream side thereof, the peeling tape 6 is kept taut. The guide is reliable.

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, but the invention is not limited to this, and the drive shaft may be pivoted and the lug feed roller 12 may be fitted thereto.

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 t-1 and peels off a sheet onto which this image has been transferred from an image carrier, the image carrier and a peeling member interposed between the sheet having the transferred image and peeling the sheet having the transferred image from the image carrier; and a conveying member for conveying the sheet, the peeling member extending along the conveying direction of the sheet, and a downstream side of the peeling member along the sheet conveying direction being connected to the image carrier and the above through the peeling member. Since the sheet is supported so as to be further away from the image carrier than the part adjacent to the sheet, as the sheet moves away from the front of the transfer position, the sheet is guided so as to be separated from the image carrier, and the position of the sheet is controlled. It can be forcibly shifted toward the conveying path formed by the conveying member, and this brings about effects such as reliable peeling.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view of the essential parts of an electronic copying machine equipped with a transfer and peeling device, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a front view thereof. 1... Image carrier (feeling 0 body), P... Sheet (copy paper), 6... Peeling member (peeling tape), 12... Conveying member (feeding sheet roller), 13... Conveyance member (auxiliary conveyance roller), No. 4...Tension spring.

Claims (3)

[Claims] (1) In a 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, there is no interference between the image carrier and the sheet having the transferred image. and a peeling member that peels off the sheet having the transferred image from the image carrier, and a conveying member that contacts near the edge of the sheet peeled off by the peeling member and conveys the sheet, and the peeling member extends along the conveying direction of the sheet, and the downstream side of the peeling member along the sheet conveying direction is closer to the image carrier than the adjacent portion of the image carrier and the sheet via the peeling member. A transfer peeling device characterized in that the transfer peeling device is supported so as to be spaced apart from. (2) The transfer peeling device according to claim 1, wherein the peeling member is engaged with a conveying member. (3) The peeling member has its upstream side fixedly held along the sheet conveyance direction, and its downstream side elastically biased toward the downstream side. The transfer peeling device according to item 1 or 2.