JPS6270139A - Mechanism for removing paper sheet erroneously conveyed, in paper conveying device - Google Patents

Abstract

PURPOSE:To make possible to easily and rapidly remove a recording paper sheet which is erroneously conveyed, by providing a transmission shaft provided thereto with an electromagnetic clutch between a pair of rollers and a drive shaft. CONSTITUTION:When a power source is cut off to deenergize a main motor, a driven section 16b is isolated from a prime-mover section 16a in an electromagnetic clutch 16, and therefore, a motor driven shaft 14 may be driven in both normal and reverse directions. Therefore, the shaft 14 is manually reversed to reverse an extracting roller 9 and a pair of input/output rollers 10, 10' in a paper inverting device 4 connected to the transmission shaft 14, rollers 3, 3', 11, 11', etc. During these rollers being reversed, a recording sheet 12 which enters into an inverting shoot 15 in the paper inverting device 4 and does not come out therefrom, or a recording sheet 12 held between a drive roller 6 and a nip roller 7 or 8 in the extracting roller 9 may be removed without being torn.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mechanism for removing recording paper that has caused a transport error from a paper transport path provided with a paper reversing device of an electrophotographic apparatus.

(Prior Art) Conventionally, the paper transport path of an electrophotographic device equipped with a paper reversing device for automatically copying original images on the front and back sides of recording paper runs from a paper feed section provided in a part of the machine body. A path that passes through the transfer section of the photoreceptor, passes through a pair of fixing rollers and a pair of ejection rollers in order to a paper ejection tray outside the machine, and then passes through a paper reversing device and an inner tray in order from between the pair of fixing rollers and the pair of ejection rollers. and a path leading to the transfer section such as the photoreceptor drum. In order to copy the original image on the front and back sides of recording paper using the paper transport path, first feed the recording paper from the paper feed section of the machine main body to a transfer section such as a photoreceptor drum,
The transfer section transfers the unfixed toner image onto the surface of the recording paper. Next, after the toner image is fixed by a pair of fixing rollers, it is guided to a paper reversing device, and after being reversed from front to back by the paper reversing device, it is temporarily stored in an inner tray. Thereafter, the recording paper is sent to the inner tray, where the unfixed toner image is transferred to the back surface of the recording paper. The toner image is then fixed by a pair of fixing rollers and discharged onto a paper discharge tray outside the machine by a pair of discharge rollers.

In order to copy the image of the original onto the front and back sides of the recording paper as described above, the path from the pair of fixing rollers to the inner tray is shown in Figure 2 when an invert chute is used as the paper reversing device. It was configured as shown.

That is, from the fixing roller pair 1.1' to the conveying roller pair 2.2
', 3 and 3' are used to provide a conveyance path for the recording paper to reach the paper reversing device 4. On the other hand, the paper reversing device 4 includes an invert chute 5 for reversing the front and back of the recording paper, a tri-roller 9 including a drive roller 6 and nip rollers 7 and 8 provided at the exit of the invert chute, and the invert chute 5. It consists of a pair of rollers 10, 10', etc. for exiting people provided near the exit section of the system. and the paper reversing device 4
The inner tray (not shown) has a pair of transport rollers 11.
11' is provided. As a result, the recording paper 12 that has passed between the pair of fixing rollers 1 and 1' is guided to the paper reversing device 4 via the pairs of transport rollers 2 and 2' and 3 and 3'. In the paper reversing device 4, the drive roller 6 of the tri-roller 9
and 2. Knob roller 7. and entry/exit roller pair 10.10'
The recording paper 12 is temporarily stored in the invert chute 5 using the invert chute 5. Thereafter, the recording paper 12 is pulled out from the invert chute 5 by the feed roller pair 10, 10', the drive roller 6 of the tri-roller 9, and the nip roller 8, and its front and back sides are reversed.
1.11' into the inner tray.

(Problems to be Solved by the Invention) However, the drive side of the transport roller pair 2.2', 3.3' in the paper transport path from the fixing roller pair 1, 1' to the inner tray, In the paper reversing device 4, the drive roller 6 of the tri-roller 9, the driving side of the roller pair 10.10' and the pair of transport rollers 11.11', etc., are arranged only in one direction toward the transport direction of the recording paper 12. It was constructed so that it could not be rotated.

For this purpose, the invert chute 5 of the paper reversing device 4 is
The recording paper 12 inserted into the invert chute 5 cannot be pulled out from the invert chute 5, or the tri-roller 9
When the recording paper 12 is wrapped around the drive roller 6 and nip roller 7 or 8 of the tri-roller 9, the recording paper 12 should be pulled out from within these invert chute 5 or from between the drive roller 6 of the tri-roller 9 and the nip roller 7 or 8, etc. There is a drawback that it takes a very long time to remove the recording paper 12, and it is technically very difficult to remove the recording paper 12 without tearing it.

The present invention has been made to eliminate the drawbacks of the conventional paper reversing device.

(Means and effects for solving the problem) The driving force of the main motor of the machine body is transmitted from the drive shaft to the pair of transport rollers 2.2' and 3.3', and the pair of tri-rollers 91 of the paper reversing device 4. 10 and 10', and further to the pair of conveying rollers 11 and 11', the transmission is carried out via a transmission shaft having an electromagnetic clutch in the middle. The one-way electromagnetic clutch is provided so as to be interlocked with the main motor, so that the electromagnetic clutch is engaged when the main motor starts, and is disengaged when the main motor stops rotating. As a result, when the electromagnetic clutch is disengaged, the transmission shaft is made to be able to rotate in either the forward or reverse direction, and if a trouble occurs in the paper reversing device 4, the recording paper 12 thrown into the invert chute 5 is output as it is. If the transmission shaft does not come up, or if it gets wrapped between the drive roller 6 of the tri-roller 9 and the nip roller 7 or 8, etc., manually rotate the transmission shaft in the necessary direction using a knob etc. The recording paper can be removed from the invert chute 5 or the tri-roller 9 of the paper reversing device 4 without tearing it.

(Example) The present invention will be described in detail below based on an example shown in the drawings.

FIG. 1 is a sectional side view showing an embodiment of a recording paper removing mechanism in a paper reversing device of the present invention.

The driving force of the main motor in the machine body is transmitted from the drive shaft 13 connected to the main motor to the drive side of the pair of transport rollers 2.2' and 3.3' of the paper transport device shown in FIG. 2, and to the paper reversing device. When transmitting to the drive roller 6 of the tri-roller 9 of No. 4, the roller 10, 10' for taking out people, and the drive side of the pair of transport rollers 11, 11', etc., the transmission shaft 14 is provided in the middle. To transmit the driving force from the drive shaft 13 to the transmission shaft 14, a roller 15 is attached to one end of the drive shaft 13, and an electromagnetic clutch 16 is attached to the transmission shaft 14.
is attached to the roller 15 and via the electromagnetic clutch 16.

Alternatively, the driving force may be transmitted by using the roller 15 as a gear,
Further, the electromagnetic clutch 16 side may also be a gear.

On top of that, the electromagnetic clutch 16 has a driving part 16a and a driven part 16.
The driving part 16a is rotatably attached to the transmission shaft 14 using a bearing 17, while the driven part 16b is fixed to the transmission shaft 14 using a pin 18 or the like. Do it like this. As a result, the driving portion 16a of the electromagnetic clutch 16, the driven portion 16b
, the driving force of the drive shaft 13 is transferred to the transmission shaft 1.
4, and when the driven part 16b is disconnected from the driving part 16a, the driving force of the drive shaft 13 is prevented from being transmitted to the transmission shaft 14. The operation of engaging and disengaging the electromagnetic clutch 16 is linked with the operation of the main motor, and when the main motor starts, the electromagnetic clutch 16 is automatically engaged and the rotation of the main motor is stopped. When the vehicle stops, the electromagnetic clutch notch 16 is configured to automatically turn off.

The present invention is constructed as described above.

Now, the fixing roller pair 1 shown in FIG. passing through the
When the recording paper 12 that has been guided to the paper reversing device 4 by the pair of transport rollers 2.2' and 3.3' remains in the invert chute 5 of the paper reversing device 4 and does not come out, If the paper becomes wrapped around the drive roller 6 and the nip roller 7 or 8 of the tri-roller 9 of the paper reversing device 4, the operator should turn off the power to the machine body and stop the rotation of the main motor. let Accordingly, the electromagnetic clutch 16 provided on the transmission shaft 14 is disengaged to separate the driven portion 16b from the driving portion 16a of the electromagnetic clutch 16, thereby making the transmission shaft 14 rotatable in either forward or reverse directions. Then, a hand-cranking device such as a knob is attached to the transmission shaft 14 and rotated in the reverse direction, and the tri-roller 91 of the paper reversing device 4 connected to the transmission shaft 14 is rotated by a pair of rollers 10.10'.
Also, a pair of transport rollers 3 provided before and after the paper reversing device 4
．． 3', 11, 11', etc., are rotated in the opposite direction. When these rollers, etc. are rotating in the reverse direction, the recording paper 12 that has been thrown into the invert chute 5 of the paper reversing device 4 and does not come out, or the drive roller 6 and nip roller 7 or 8 of the tri-roller 9, etc. The recording paper 12 wound between the holes is removed from these parts without tearing it.

(Effects of the Invention) The present invention is constructed and used as described above.

Thus, the pair of transport rollers 2, 2' and 3, 3', and the tri-roller 92 of the sheet reversing device 4, and the pair of rollers 10 for feeding
．． 10', conveyor roller pair 11, 11', etc., when the main motor of the machine body stops rotating, the electromagnetic clutch 1
6 is cut, and the transmission shaft 14 is connected to the drive shaft 13.
is in a free state and can be rotated in either the forward or reverse direction via the transmission shaft 14, so that, for example, in the paper reversing device 4, the recording paper 12 remains in the invert chute 5 and comes out. If the recording paper 12 does not come, or if it gets wrapped between the drive roller 6 of the tri-roller 9 and the nip roller 7 or 8, the recording paper 12 can be easily and quickly removed from these trouble spots via the transmission shaft 14. Therefore, it has the effect that the work efficiency can be further improved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view showing an embodiment of a recording paper removal mechanism in a paper reversing device of the present invention, and FIG. 2 shows a conventional paper reversing device using an invert chute and a paper transport path in the vicinity thereof. FIG. 2 is a schematic configuration diagram showing the arrangement of transport equipment. In the figure, 1, 1'...Fixing roller pair, 2.2', 3.3
'...Transport roller pair, 4...Paper reversing device, 5
...Invert chute, 6...Drive roller, 7.8...Two-socket 7'0--y, 9...Tri-roller, 10.10'...For people. Laura v., 11.
11'...Conveyance roller pair, 12...Recording paper, 1
3... Drive shaft, 14... Transmission shaft,
15...Roller, 16...Electromagnetic clutch, 16
a... Driving part, 16b... Driven part, 17...
・Bearing, 18...Bin, etc.

Claims (1)

[Claims] The driving force of the main motor of the machine body of electrophotographic equipment, etc.
In order to transmit the transmission from the drive shaft to a pair of conveyance rollers provided on the paper conveyance path, a transmission shaft equipped with an electromagnetic clutch is provided between the pair of conveyance rollers and the drive shaft,
The electromagnetic clutch is interlocked with the main motor so that the electromagnetic clutch is automatically disengaged when the main motor stops rotating, and the electromagnetic clutch is automatically disengaged and the transfer roller is transmitted via the transmission shaft. A mechanism for removing mis-transported paper from a paper conveying device, characterized in that the mechanism is capable of rotating in both forward and reverse directions.