JPS6230032Y2 - - 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 its purpose is to prevent sheets from being transported in a predetermined state when the sheet is being fed manually, which is prone 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 performs 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). The document support body 2 is formed of a cover body that can be opened and closed, and a glass stand to which the cover body is pivotally mounted, and is adapted to place a document 2a thereon. 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.
An optical path 9 is formed in which the light is reflected again and forms an image of the original surface of the original 2a on a transfer drum 8, which will be described later.

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 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 shaped like strips and stand upright in 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, and 26b are provided with angles gradually shifted from the side of the drum 8 on which the peeling belt 21 slides in contact with the peeling belt 21 in the rotation direction.

On the other hand, as shown in FIG.
A paper feeding device 27 is provided that sequentially feeds the sheets one by one. This transfer paper 15 is then moved to the guide roller 28.
a... and a guide plate 28b to guide the paper to the transfer section 14a along a paper feed path 28. 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 (not shown) and an infrared heater 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 guide 31b closes the opening 31a, the paper feed roller 27a is in a paper feeding position, and
When the paper feeding roller 27a is rotated by 90 degrees to be horizontal as shown by the two-dot chain line, the paper feeding roller 27a separates from the transfer paper 15 and stops feeding the paper. In addition, the auxiliary roller 3 extends from the manual paper feed section 31 to the paper feed path 28.
An auxiliary paper feed path 32 is provided, which includes 2a, 32a and an auxiliary guide 32b. Auxiliary paper feed path 32
A detection section 33 is provided in the middle, and as shown in FIG. Consisting of These lamps 34 and CdS elements 35 are connected to an electric circuit shown in FIG. That is, this is
ON-OFF by increasing/decreasing the resistance value of CdS element 35
Transistor Tr ₁ and this transistor Tr ₁
It mainly consists of a transistor _Tr2 that turns on and off in response to the on and off of the transistor Tr2, and a drive system relay PRT and a copy push button switch PRINT-SW connected in series with the transistor _Tr2 . 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, optical system 3
As a result, a latent image pattern on the surface of the document is formed on the peripheral wall of the drum 8, and as the drum 8 rotates, this pattern is visualized facing the developing device 10. On the other hand, the transfer paper 15 is conveyed from the paper feeding device 27 along the paper feeding path 28, and is electrostatically attracted to the developing portion of the drum 8 at the same timing. At this time, transfer charger 1
4, the image is transferred 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 gradually separates from the drum 8 as it is conveyed. Peeling guide plates A to C 24, 25, and 26 are successively interposed in the gaps created by this separation, 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 removing 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 an auxiliary roller 32a,
32a to the position corresponding to the detection section 33. The copy push button switch is further pressed, but at this time the side edge of the transfer paper 15 is placed on the peeling belt 2.
1 (that is, not inserted in the correct 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 correct 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 resistance value of the CdS element 35 becomes high and transistors Tr ₁ and Tr ₂ are turned on, so when the copy push button switch (PRINT-SW) is pressed, the drive system relay (PRT) is activated and the drive system is activated. . That is, the auxiliary rollers 32a, 32a, etc. rotate to guide the transfer paper 15 from the auxiliary paper feed path 32 to the paper feed path 28,
The copying operations described above are 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 copy switch can be started only when the sheet is in a predetermined conveyance state in the case of manual paper feeding which is prone to skew, thereby preventing image transfer defects and jams. 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; 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 feed error detection FIG. 3 is an electrical circuit diagram of the device. 14a...Transfer section, 15...Sheet (transfer paper), 31...Manual paper feeding means (manual paper feeding section), 33...Sheet detection means (detection section), PRT
...Copy switch.

Claims (1)

[Scope of utility model registration request] A manual sheet feeding means for feeding a sheet to be supplied to the transfer section, a sheet detection means for detecting a sheet fed from the manual sheet feeding means and guided to the transfer section in front of the transfer section, and this sheet detection means. means for starting a copying operation by operating a copying switch only when the presence of a sheet is detected by the sensor, and the sheet detecting means is positioned at a position to detect a side edge of the sheet when the sheet is in a predetermined conveyance state. An electronic copying device characterized in that: