JPH0322624B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic copying device equipped with a manual paper feeding means, and an object of the present invention is to copy a copying device when a sheet is in a predetermined conveyance state in the case of manual paper feeding that is easy to skew. To provide an electronic copying apparatus which is configured so that a copying operation can be started only by operating a copying switch, and which prevents the occurrence of defective image transfer and jams and enables efficient copying.

An embodiment of the present invention will be described below based on the drawings. In the figure, reference numeral 1 denotes a main body of an electronic copying apparatus, and a document supporter 2 is provided on the upper part of the main body 1, which is movable back and forth by a drive system (not shown). Original support 2
is formed of a lid that can be opened and closed, and a glass stand to which the lid is pivotally mounted, on which the original 2a can be placed. The glass stand faces an optical system 3 provided within the main body 1. The optical system 3 includes a lamp 4, first and second mirrors 5 and 6, and a lens 7 provided between them.
The light projected from the lamp 4 onto the document support 2 and reflected is guided to the first mirror 5, and further guided to the second mirror 6 via the lens 7, where it is reflected again and will be described later. Original 2 on transfer drum 8
An optical path 9 is formed to project and image the document surface a.

A photoconductive substance such as Se is completely deposited on the outer peripheral wall of the transfer drum 8 (hereinafter referred to as drum).
It is rotatable in the direction of the arrow. Furthermore, various devices are arranged radially along this peripheral wall.
A developing device 10 is provided offset in the rotational direction from the image formation position of the document surface of the drum 8 . This developing device 10 includes a magnetic brush 11 that applies powdered toner to the peripheral wall of the drum 8, a stirring blade 12 that efficiently combines the toner and carrier, and a toner supply section 13.
It is made up of. A transfer charger 14 charges a transfer paper 15, which is a sheet, and together with the drum 8 forms a transfer section 14a. 1
Reference numeral 6 denotes a stripping device to be described later, which includes a fluorescent lamp 17 for removing electric charges remaining on the drum 8, a cleaning device 18 equipped with a rotating brush and a filter for removing toner remaining on the drum 8, and a charger 19 for charging the drum 8. They are arranged sequentially.

Further, the peeling device 16 is designed as shown in FIG. That is, an extremely thin peeling belt 21 made of mylar material, which is fixed at one end and suspended by a tension spring 20 at the other end, is joined to one end in the axial direction of the drum 8, and the first peeling belt 21 is attached to one end of the drum 8 in the axial direction. It forms a body 22. Peeling guide plates A to C, 24, 25, and 26 made of the second peeling body 23 are provided at equal intervals from the position where the first peeling body 22 slides on the drum 8 to the other end side. ing. These peeling guide plates A to C, 24, 25, and 26 are in the form of band plates and are in an upright position with respect to the axial direction of the drum 8. The side ends of these drums 8 are provided with notches 24a and 25 concentrically adjacent to the drum 8.
a, 26a, and the lower end portions 24b, 25b,
The position 26b is provided such that the angle formed between this position and the vertical center axis 8a of the drum 8 gradually increases. That is, θ ₁ < θ ₂ < θ _3. In other words, the lower end portions 24b, 25b, 26b are gradually shifted in angle in the rotation direction from the sliding contact side of the peeling belt 21 of the drum 8 to the other end side. It is provided.

On the other hand, as shown in FIG. 1, a paper feeding device 27 is provided at the bottom of the main body 1 to feed the transfer paper 15 one by one as a paper feeding roller 27a rotates. This transfer paper 15 is then moved by the guide roller 28a...
The paper is guided to the transfer section 14a along a paper feed path 28 consisting of a guide plate 28b and a guide plate 28b. Furthermore, there is provided a conveyance path 30 consisting of a conveyance belt 30a and a conveyance roller (not shown) that leads from the transfer section 14a to a paper discharge tray 29 provided on the side of the main body 1. Further, a fixing section consisting of a charge removal charger and an infrared heater (not shown) is provided in the middle of the conveyance path 30 facing the conveyance belt 30a.

On the other hand, 31 is a manual paper feed section provided on the other side wall of the main body 1, and this includes an opening 31a that opens in the side wall of the main body 1, and a manual paper feed section that is rotatably supported in the opening 31a. 31b. The manual feed guide 31b is connected to the paper feed roller 27a of the paper feed device 27, and when the manual feed roller 27a closes the opening 31a, the paper feed roller 27a enters the paper feeding position and rotates 90 degrees as shown by the two-dot chain line. When the paper feed roller 27a is moved horizontally, the paper feed roller 27a separates from the transfer paper 15 and stops feeding the paper. Also, the manual paper feed section 31
auxiliary rollers 32a,
32b and an auxiliary paper feed path 32 are provided. A detection unit 33 is provided in the middle of the auxiliary paper feed path 32, and this
As shown in the figure, it consists of a lamp 34 that irradiates an extension of the peeling belt 21, and a Cds element 35 that receives light from this lamp 34. These lamps 34 and Cdg elements 35 are connected to an electric circuit shown in FIG. In other words, this is a transistor Tr ₁ that turns on and off depending on the increase/decrease in the resistance value of the Cds element 35, and _an ON-
Transistor Tr ₂ that turns ON-OFF in response to OFF
and the drive system relay PRT and copy push button switch PRINT− connected in series with this transistor Tr ₂ .
It is mainly composed of SW. In this way, the detection section 33 and the electric circuit connected thereto constitute a paper feeding error detection device.

Next, the operation of the above embodiment will be explained. Place the original 2a with the original surface facing down on the original support 2, and press the copy push button switch. The lamp 4 is turned on and the document support 2 and the drum 8 are moved through the drive system.
etc. are displaced in the direction of the arrow. Therefore, a latent image pattern on the surface of the document is formed on the peripheral wall of the drum 8 by the optical system 3, and as the drum 8 rotates, a latent image pattern is formed in the developing device 10.
It is visualized opposite to. On the other hand, the transfer paper 15 is conveyed from the paper feeding device 27 along the paper feeding section 28, and is electrostatically attracted to the developing portion of the drum 8 at the same timing. At this time, the transfer charger 14 performs the transfer onto the transfer paper 15. However, one end of the transfer paper 15 cannot roll into contact with the drum 8 because of the peeling belt 21, and becomes a non-image area, and is successively separated from the drum 8 as it is conveyed. In the gaps created by this separation, there are peeling guide plates A to C2.
4, 25, and 26 are successively interposed, and the transfer paper 15 is sequentially peeled off diagonally with respect to the axial direction of the drum 8. The transfer paper 15 is then conveyed along the discharge path 30 and discharged onto the paper discharge tray 29. On the other hand, the drum 8 faces the removal fluorescent lamp 17 and the cleaning device 18, and the remaining toner is removed, and all copying operations are completed.

Further, when transferring to a transfer paper 15 having a different size from the transfer paper 15 by the paper feeder 27, the manual feed guide 31b is rotated to open the opening 31a. Then, the transfer paper 15 is transferred to the auxiliary roller 32a,
32a to the position corresponding to the detection section 33. Further, the copy push button switch is pressed, but at this time, the end side of the transfer paper 15 is placed on the peeling belt 2.
1 (that is, not inserted in the proper position), the light emitted from the lamp 34 is received by the Cds element 35. Since the resistance value of the Cds element 35 decreases due to light reception, the transistor Tr ₁ does not turn on as shown in FIG. 3, and the transistor Tr ₂ also responds to this. Therefore, even if the copy push button switch (PRINT-SW) is pressed, the drive system relay (PRT) does not work, and the drive system does not operate. Therefore, no copying action takes place. However, when the side edge of the transfer paper 15 is on the extension line of the peeling belt 21 (that is, when it is inserted in the proper position), the light from the lamp 34 is blocked by the transfer paper 15 and the Cds element 35 does not receive the light.
The Cds element 35 has a high resistance value, and the transistor
Since Tr ₁ and Tr ₂ are in the ON state, pressing the copy push button switch (PRINT-SW) activates the drive system relay (PRT) and activates the drive system. That is, the auxiliary rollers 32a, 32a, etc. rotate to transfer the transfer paper 15.
is guided from the auxiliary paper feed path 32 to the paper feed path 28, where the above-described copying operation is performed. Since one end of the transfer paper 15 is reliably guided so as to come into sliding contact with the peeling belt 21, it can be easily peeled off from the drum 8.

As explained above, the present invention has a configuration in which the copying operation by operating the copying switch can be started only when the sheet is in a predetermined conveyance state in the case of manual feeding, which is prone to curling, so that image transfer defects and jams can be avoided. This has the effect of preventing the occurrence of such occurrences and allowing efficient copying.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway schematic side view of an electronic copying device, FIG. 2 is a perspective view of the main parts, and FIG. 3 is a paper feeding error detection device. FIG. 14a... Transfer section, 15... Sheet (transfer paper),
31...Manual paper feeding means (manual paper feeding section), 3
3... Sheet detection means (detection unit), PRT... Copy switch.

Claims (1)

[Scope of Claims] 1. A manual paper feeder that manually feeds the sheet to be supplied to the transfer section; and a sheet that detects the sheet fed from the manual paper feeder and guided to the transfer section in front of the transfer section. a detecting means; and a means for causing a copying operation to be performed on the manually fed sheet by operating a copy switch only when the presence of a sheet is detected by the sheet detecting means; An electronic copying apparatus characterized in that the electronic copying apparatus is arranged at a position where a side edge of a sheet is detected when the sheet is in a predetermined conveyance state.