JPS615245A - Copying machine - Google Patents

Abstract

PURPOSE:To detect surely slippage of an original by operating an original size detecting sensor, which is provided in a proper position on one side of a platen cover which can be opened and closed, at the platen cover opening time as well as the platen cover closing time. CONSTITUTION:Plural original size detecting sensors 4 are provided in required positions on the rear face of a platen cover 3 covering a platen glass 2 of a copying machine body 1. When the cover 3 is turned with one side as the fulcrum and is closed up to the position indicated in the figure by dotted lines, an optical system omitted in the figure is turned on, and a part of size detecting sensors 4 are operated in accordance with the original size, and it is stored in a memory. When the cover 3 is closed completely, size detecting sensors 4 are operated again, and this condition is compared with the stored operation condition; and if they do not coincide with each other, positional slippage of the original is detected, and this error is displayed on a display part 6. Thus, positional slippage of the original is detected surely to prevent failures of copying.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a copying machine equipped with a document size detection sensor.

(Prior Art) A conventional copying machine equipped with a document size detection sensor is configured to detect the size of a document placed at a predetermined position on a platen glass with the platen cover closed. However, this method has the disadvantage that the original placed on the platen glass may be misaligned due to the air flow when the platen cover is moved, resulting in incorrect size detection. .

(Object of the Invention) The present invention has been made in order to eliminate the drawbacks of the above-mentioned conventional copying machine equipped with a document size detection sensor. To provide a copying machine that eliminates erroneous detection of U14 size by notifying an operator of the misalignment of the original when a platen cover is placed on the original and resetting the original. It is intended to.

(Structure of the Invention) For this purpose, the present invention provides a copying machine equipped with the document size detection sensor, in which the size of the document set at a predetermined position on the platen glass is determined when the platen cover is fully open and when the document size is completely opened. Detection is performed twice, once when it is in the closed state, and if the two detected sizes are different, it is determined that there is a misalignment of the document, and the screen is displayed on an appropriate display device.
This pressured the operator to re-set the original.

(Collection of Examples) The present invention will now be described in detail based on embodiments shown in the drawings.

FIG. 1 is an imaginary line of each size of a document on a platen glass surface of a conventional copying machine, etc., and FIG. 2 is a perspective view of a copying machine equipped with a document size detection sensor according to the present invention.

In these figures, the platen glass 2 of the copying machine main body 1
A document size detection sensor 4 such as a phytosensor is placed on the back side of the platen cover 3, which is attached to one side of the platen cover 3 so that it can be opened and closed using a rotating shaft or the like. The document size detection sensor 4... is arranged at a location corresponding to the batch/mark drawn within the imaginary line of each document size on the two sides of the platen glass shown in FIG. The detection sensors 4 are connected via a microcomputer or the like to a display device 6 provided on a part of a control panel 5 placed on the front upper surface of the copying machine main body 1. A microsinch, reed switch, etc. is connected to the optical system, and when the cover 3 is closed on the platen glass 2, the cover 3 is rotated at a certain angle shown by the chain line with the rotating shaft as the fulcrum. When the document passes through the platen glass 2, the optical system is turned on and light is emitted to detect the size of the document set on the platen glass 2 by the document size detection sensor 4.
..., and the signal is stored in the microcomputer, and when the cover 3 completely closes over the platen glass 2, the optical system is turned on again to detect the size of the document. The signal is compared with the above signal by the microcomputer, and if the size signal is one, it is assumed that there is no misalignment of the original, and that size is set. If the original is out of alignment, it is determined that there is a misalignment of the original, and a signal to that effect is sent to the display device 6 to notify the operator of busy schedules and instruct the operator to re-set the original. Then the copying is finished.

When the opening/cover 3 is opened, if the angle shown by the chain line is exceeded, the set document size signal is reset and the state is set to standby for detection of the next document size.

(Effects of the Invention) The present invention is constructed and used as described above, and has two surfaces when the platen cover 2 is opened and closed during the process of detecting the size of the document set on the platen glass 2. If these two detection sizes are different, it is determined that the document is misaligned, and the display e6 instructs the operator to re-set the document, so false detection of the document size can be completely prevented. Therefore, there are no copy errors, which helps save resources.

[Brief explanation of drawings]

Figure 1 shows W on the platen glass surface of a conventional copying machine, etc.
Figure 2 is a perspective view of a copying machine equipped with a document size detection sensor according to the present invention. In the figure 1...Copy machine main body, 2-.Platen glass, 3.
... 'j5fn cover, 4... Original size detection sensor.

Claims (1)

[Claims] A document size detection sensor is installed on the back of the platen cover, which is attached to one side of the copying machine so that it can be opened and closed, and the sensor detects the size of the document set on the platen glass when the cover is opened and closed. 1. A copying machine characterized in that the copying machine detects deviation of the document set on the platen glass based on the state of the signal.