JPS612627A - Original copy circulating and reversing device - Google Patents

Abstract

PURPOSE:To facilitate the positioning of an original copy size detecting means with no extra space being prepared, and to eliminate erroneous operation, in an original copy circulating and reversing device, by utilizing a photo-sensor for detecting an original copy. CONSTITUTION:A circulating path 2 is provided, utilizing an original copy set tray 1 as starting and terminal points. A reversing transfer path 3 is branched off from the circulating path 2 in the vicinity of the downstream section of the circulating path 2. Change-over between the circulating path 2 and the reversing path 3 is carried out such that a gate 4 provided at the branch-off point between both paths is driven by a gate drive device 5. There is provided a photosensor 6 in front of the original copy set tray 1, the output of the photosensor 6 being delivered to a control device 7. An output signal is delivered to determine whether the size of papers is a predetermined size or not. If it is not the predetermined size, a control signal is delivered to the gate drive device 5 to change over the gate 4 toward the circulating path 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a copy document circulation and reversing device for circulating and reversing a copy document.

(Prior Art) A copy document circulation and reversing device is known which includes a circulation path and a reverse transfer path and is capable of continuously copying both sides of a copy document.

(Problems to be Solved by the Invention) If a non-standard original is mistakenly used in this copying original circulation/reversing device and this original is further sent to the reverse transfer path, the original will not be ejected from the reverse transfer path. A paper jam occurs. Therefore, in the past, two microswitches were installed at different positions in the document set tray, and when an unspecified document was used, this was detected, and the gate at the branch point with the anti-transfer path was controlled to control the anti-transfer path. It was designed to prevent unspecified manuscripts from entering the road. However, when a microswitch is used to detect the size of a document, the microswitch tends to malfunction, resulting in paper jams and damage to the document.

Additionally, a space was required to install the microswitch and a space to install the harness.

SUMMARY OF THE INVENTION An object of the present invention is to provide a copy document circulation and reversal device that can reliably detect the document size without causing any malfunction.

Another object of the present invention is to provide a copy document circulation and reversal device in which a document size detection means can be easily arranged without providing a special space.

(Means and effects for solving the problem) The copying original circulation/reversing device of the present invention uses an optical sensor as a means for detecting the original size, and the operating time (ON or OFF) of the optical sensor when the original is transferred The document size is detected from the signal time).

(Example) Hereinafter, the present invention will be explained in detail with reference to examples.

FIG. 1 is an overall schematic diagram showing an embodiment of the present invention.

A circulation path 2 is provided with the original set tray 1 as its starting and ending point. An anti-transfer path 3 is branched near the downstream of the circulation path 2, and switching between the circulation path 2 and the anti-transfer path 3 is achieved by driving a gate 4 provided at the branch point with a gate drive device 5. Is going. An optical sensor 6 is provided in front of the document set tray 1, and the output of this optical sensor 6 is input to a control word @7.

In the apparatus configured as described above, the document is transported in the following manner. First, a case where a document of a specified size is used will be explained. The original taken out from the original set tray 1 first passes through the optical sensor 6 at a constant speed. The output of the optical sensor 6 is sent to the control device 7, the document size is confirmed, and the conveyance of the document 10 is temporarily stopped at the position of the platen 9 of the copying machine 8. Here, the front surface of the original 10 is copied and the original is conveyed to the downstream side of the circulation path 2 again. gate 4
is switched to the opposite transfer path 3 side - C1 original 10
is transferred to the reverse transfer path 3. The original 10 carried into the reversing JX path 3 is conveyed in the opposite direction and set on the original reversing tray 1 with the front and back sides reversed. When the document size is larger than the specified size, the optical sensor 6 is in a shielded state for a longer period of time, and an output signal (ON-OFF signal) indicating this state is output from the optical sensor 6. This signal is sent to the control device 7,
It is determined that the size of the original 10 is outside the specified size. When it is determined that the size of the original 10 is outside the specified size, a signal is sent from the control device 7 to the gate driving device 5, and the gate 4
is driven by the gate drive device 5 and switched to the circulation path side 1, and the document 10 is not conveyed to the reverse transfer path 2 but is directly set on the document setting tray. Note that if it is detected that the document 10 is not of the specified size, it is convenient to display this on the console panel 11. Also,
In the present invention, since the detection of the document size is performed electrically, even if there is a change in the size of the document to be determined, simply sending an instruction from the console panel 11 to the control means 7 can be done.
The standard to be reversed can be easily changed, and when using microsinch as a control means, it can be handled by partially changing the history of Broclado.

(Effects of the Invention) In the present invention, since an optical sensor is used as a means for detecting the document size, there is no malfunction 712 compared to the case where a micro switch is used, and therefore damage to the document can be prevented. I'll come. J: It was possible to eliminate the micro-sinch and its harness, and the manuscript was seso) l
- It is possible to have a simple structure that does not require installation of a switch, and the cost is reduced because the trouble of pulling a harness is eliminated.

[Brief explanation of the drawing]

The figure is a schematic diagram showing an embodiment of the present invention. 1 Original set tray, 2 Circulation path, 3 Reverse transfer path,
4 gate, 5 gate drive device, 6 optical sensor, 7
Control device, 8 copying machine, 9 platen, 10 original, 11 console panel.

Claims (1)

[Claims] A document circulation system that includes a circulation path, a counter-transfer path, a gate provided at a branch point of the counter-transfer path to switch the feeding path, and a gate drive device that drives the gate, and performs circulation and reversal of a copy document. In the device, an optical sensor is provided in the circulation path upstream of the branch point, and upon receiving the output signal of this optical sensor, it is determined whether the document size is a specified size or not. A copy document circulation and reversing apparatus, comprising: a control means for sending a control signal to the gate driving device to switch the gate to the circulation path side.