JPS5910975A - Transferring and separating device - Google Patents

Abstract

PURPOSE:To prevent the disorder of an image, by providing the 1st conveyance member which contacts a sheet on the side where a transfer image is formed and the 2nd conveyance member which is provided facing the 1st member for clamping the sheet, and making the contacting width of the 1st conveyance member to the sheet less than that of the 2nd conveyance member. CONSTITUTION:An edge feeding roll 12 as the 2nd conveyance member (driving roll) is fitted around one end part of a driven shaft 10 and an auxiliary edge feeding roll 13 as the 1st conveyance member (driven roll) with narrow width is inserted into the through hole 9 of the separating tape 6 and in rolling contact with the edge feeding roll 12. A copying machine body A is provided with a lever 15 which is energized downward elastically by a tension spring 14 to rotate. Consequently, the contacting width of the auxiliary edge feeding roll 13 to the copying paper P is less than that of the edge feeding roll 12 to the copying paper P, so the contacting width area of the image surface is small and the image is not disordered. Further, the roll 13 contacting the image surface side is the driven roll, so even if skew or jamming occurs, the image is not stained.

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, an electronic copying machine is equipped with a transfer separation device that transfers an original image formed on a photoreceptor (image carrier) onto copy paper (sheet) and peels off the transfer paper onto which this original image has been transferred from the photoreceptor. It is being

By the way, this transfer peeling device separates the transfer paper on which the original image has been transferred from the photoreceptor by interposing a release tape at the side edge between the photoreceptor and the transfer paper, and also peels off the peeling side of the peeled copy paper. The end portion, that is, the vicinity of the ear end is held and conveyed by a re-feeding roller and an auxiliary feeding roller that rolls into contact with the re-feeding roller, thereby preventing the occurrence of gaps.

However, since the transfer paper on which the original image has been transferred is held and conveyed by the feeding roller and the auxiliary feeding roller,
There was a problem that the image on the transfer paper was disturbed. Therefore, it is conceivable to reduce the contact width of the refeed roller and the auxiliary refeed shear roller with respect to the copy paper, but in this case, skew is likely to occur.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and its purpose is to prevent the occurrence of skew and reduce the contact area of the conveying member on the image surface of the sheet so as not to disturb the image. An object of the present invention is to provide a transfer and peeling device that has the following features.

[Summary of the invention]

The present invention transfers an image formed on an image carrier to a sheet,
A transfer/separation device that separates the sheet onto which the image has been transferred from the image carrier is interposed between the image carrier and the sheet having the transferred image, and the sheet having the transferred image is peeled from the image carrier. It comprises a peeling member, and a conveyance member that conveys the sheet by contacting near the edge of the sheet peeled by the peeling member, and the conveyance member has a first conveyor member that contacts the surface of the sheet on which the transferred image is formed. 1 conveying member;
A second conveying member is provided opposite to the first conveying member and clamps the sheet between the first conveying member and the first conveying member.
It is characterized in that the contact width of the conveying member with the sheet is also small.

[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 consists of a transfer roller, and a rotating shaft 4 whose both ends are elastically lifted by tension springs 3, as shown in FIG. 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 I
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, one end of this peeling tube 6 is fixed, and the other end is stretched through a tension spring 8 to the bottle 2 that projects into the main body A of the copying machine. A rectangular through hole 9 is formed at a predetermined distance from the part of the peeling chip f6 where the photoreceptor 1 slides in contact with the photoconductor 1 in the direction of ejecting the copying machine 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.

This driven shaft 10 has a substantially drum-shaped belt driven roller 11.
, 11 are fitted. Further, a re-feed roller 12 as a second conveyance member (drive roller) is fitted to one end of the driven shaft 10. The diameter of the re-feed roller 12 is also slightly larger than the maximum diameter of the driven roller 11.

An auxiliary refeed roller 13 as a first conveyance member (driven roller) having a width narrower than the refeed roller sheath 2 is inserted into the through hole 9 and comes into rolling contact with the refeed 1 crawler 12 . That is, the main body of the copying machine is provided with a lever 15 which is elastically biased to rotate downward by a tension spring 14, and the auxiliary re-feed roller 13 is rotatably supported at the end of this lever 15. Moreover, a part of the peripheral wall of the lever 15 is covered by the peeling chip 70.
6, the release tape 6 ends up in rolling contact with the photoreceptor 1 and the lever J5 at two points. Also, a drive shaft 1 is spaced apart from and parallel to the driven shaft 1o.
6 is pivoted. 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 opposite to the driven roller 11.11 of the drive shaft 16, there is a belt drive roller 17,1 having the same shape as the driven roller 11.11.
7 is fitted. And each belt drive roller 17,1
7 and the belt driven rollers 11, 11, an endless conveyor belt 18, 18 is wound around the drive shaft 16 to run endlessly in the direction of the arrow in the figure. In addition,
Conveyor belt 18.18 to belt driven rollers 11, 11
The diameter of this portion becomes approximately equal to the diameter of the re-feed roller 12. 19 shown only in Figure 2
19 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. At the same timing as this, the original image formed on the peripheral wall of the photoreceptor L 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 20. Drive shaft 16
The conveyor belts 18 and 18 run endlessly in the direction of the arrow in the figure, and thereby rotate the feed roller 12 and the auxiliary edge feed roller 13 in the direction of the arrow in the figure. One end of the copy paper P is connected to a refeed sheet roller 12 and an auxiliary edge feed roller 13.
It is held between the two and transported securely without skew.

At this time, the auxiliary refeed roller 13 contacts the surface of the copy paper P on which the original image (transferred image) is formed, and the edge feed roller 12 contacts the surface on which the original image is not formed.

The remaining portion is placed on a conveyor belt 7s, 18, and is conveyed to face a fixing device (not shown).

According to the above configuration, the copy paper P of the auxiliary refeed sheet roller 13
Since the contact width with respect to the copy sheet P is smaller than the contact width of the refeed sheet roller 12 with respect to the copy paper P, the contact width area on the image surface is small and does not disturb both ends. Furthermore, since the roller that contacts the image surface side is driven, the image will not be smudged even if skew or soya occur.

In addition, in the above embodiment, the driven shaft 1o is pivotally supported at a portion directly below the through hole 9 of the peeling chiro, and the lug feed roller 1 is attached to this.
2 is fitted, but the present invention is not limited to this, and the drive shaft 16 may be pivotally supported, and the re-feed shear roller 12 may be fitted onto 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 transfer and peeling of sheets.

〔Effect of the invention〕

As explained above, according to the present invention, in a transfer and peeling device that transfers an image formed on a 1# carrier onto a sheet and peels the sheet to which the image is transferred from the image carrier, the image carrier is A peeling member is interposed between the sheet having the transferred image and the sheet having the transferred image thereon and peels off the sheet having the transferred image from the image carrier, and the peeling member contacts near the edge of the sheet peeled off by the peeling member to remove the sheet. a first conveying member that comes into contact with the surface of the sheet on which the transferred image is formed, and a first conveying member that is provided opposite to the first conveying member and that Since the contact width of the first conveying member with the sheet is smaller than the contact width of the second conveying member with the sheet, occurrence of skew is prevented. In addition, the contact area of the conveying member on the image surface of the sheet can be reduced, resulting in excellent effects such as not disturbing the image.

[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 (photoreceptor), P... Sheet (copy paper), 6... Peeling member (peeling tape), 12... Second
Conveying member (drive roller (edge feed roller)), 13...
First conveyance member (driven roller (auxiliary feed roller)). To the applicant's representative and patent attorney, Takehiko Suzue (Figure 2, Figure 3)

Claims (2)

[Claims] (1) In a device that transfers an image formed on an image carrier/special holiday onto a sheet and peels the sheet to which this image has been transferred from the image carrier, there is a space between the image carrier 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 contacts near the edge of the sheet peeled off by the peeling member and conveys the sheet. The conveyance members include a blunt first conveyance member that contacts the surface of the sheet on which the transferred image is formed, and a second conveyance member that is provided opposite to the first conveyance member and that holds the sheet between the first conveyance member and the first conveyance member. and a first conveying member.
A transfer separation device characterized in that a width of contact of the conveying member with the sheet is smaller than a width of contact of the second conveying member with the sheet. (2) The transfer separation device according to claim 1, wherein the first conveyance member is a driven roller that rolls into contact with the sheet, and the second conveyance member is a drive roller that faces the driven roller.