JPS6037396Y2 - Original transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document conveying device, and more particularly to a document conveying device having functions for setting, detecting, and controlling document positions for documents of various sizes.

Conventionally, in document conveyance devices used for FAX, as shown in FIG. 1, the document conveyance position is set by document guide 1.
It was carried out by

In this method, the original is set at the insertion line 2, and there may be a shift during conveyance to the reading line 3.

Furthermore, even if a document is inserted diagonally, a function is required to detect this on the reading line 3 and stop the conveyance.

Regarding devices for detecting abnormalities in the document conveyance state, there are devices that are equipped with three or more elements to adjust the edge position of a moving object (see Japanese Patent Publication No. 35846/1983), and a device that adjusts the edge position of a moving object (see Japanese Patent Publication No. 50-35846), and a device that adjusts the edge position of a moving object by adjusting the edge position of a moving object. There is a method that uses two or three elements to detect the time interval with respect to the inclination of the document and stops the conveyance (see Japanese Patent Laid-Open No. 52-99015).

However, these conventional detection and control mechanisms are complex and the control system is difficult.

In addition, in the document feeder for facsimile transmission, a mechanical setting means called a document guide is conventionally used to set the position of the document to be transported. It is necessary to consider the means of control, and it also simplifies the control system.

Furthermore, conventionally, with regard to originals, it has not been possible to detect skew, detect diagonal insertion, or prevent damage to the original, and there have been drawbacks such as hitting the side plate if the comparison degree of A4.84 sheets is small.

In order to eliminate these conventional drawbacks, the purpose of this invention is to be able to transport originals of various sizes, detect the skew of these originals, and detect and prevent skewed insertion of originals when setting originals. It is an object of the present invention to provide a document conveying device with a simple structure that can prevent damage to documents.

In order to achieve the above object, the document conveying device of the present invention guides one side edge of the document with a fixed document guide.
In a document conveyance device that sets a conveyance position, a document guide that is movable up and down adjacent to the fixed document guide, a guide movable detector that indicates the vertical movement of the movable document guide, and a fixed and movable document guide that is in contact with one side edge of the document. Document presence/absence detectors placed on each side of the extension line of the movable document guide surface and on the document reading line are arranged to display the display of the movable guide detector and the output from the document presence/absence detector corresponding to the display. A feature of this method is that document transport drive and stop are controlled by logical combinations of signals.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram illustrating the control system of the document conveying device of the present invention, and FIG. 3 shows an embodiment of the present invention.

In FIG. 2, a document 13 is moved to a control device 9 in response to a goal 7 of sending the document on the extended line of the document guide 1 according to the present invention.
The feed 10 is a position 14 where the document is to be set by the step motor drive.

Measure 15 whether the position is between Sa and Sb shown in FIG. Continue or stop driving.

Disturbance 12 is a deviation in document feeding or oblique insertion.

As shown in FIG. 3, in order to perform detection, measurement, and judgment, detection sensors 2asa and Sb are provided at the positions shown in the figure along the reading line 3 on both sides of the document guide extension line 17.

Figures 3 and 4 are examples of the case where originals are inserted diagonally and transported as they are. If the detection sensor can measure the presence or absence of a document, a logic can be formed to detect an abnormality in document conveyance.

In the case of Figures 3 and 4, the logic is "0" when there is no document, i.e., the detection sensor does not detect it; "1" when there is a document, that is, when the detection sensor detects it, and when the detection sensor detects an abnormality. Then, stop driving the document transport system, turn off the power to the device, or turn off the excitation if a step motor is used for driving.

Sa provided on both the left and right sides of the document guide extension line.
The Sb sensor is a photoelectric type detector that detects the presence or absence of a document.

FIG. 5 shows an example of a detection sensor circuit. This circuit includes a light emitting element LED22 and a light receiving element photo.

Using the Tr 23, a Schmitt circuit or a comparator 24 performs on/off operations using the light receiving element 23.

In FIG. 3, positions a and b of the sensors on the extension line of the document guide satisfy a < b due to the facsimile transmission function of electronically transmitting business documents, and the positions of the detection sensors Sa and Sb are determined.

In other words, there are many cases where there are punch holes etc. on one side of the document.
When a punch hole is detected, it is determined that the document is "missing."

However, although it is possible to control the control circuit by ignoring punch holes, etc., it has the disadvantage that the control system becomes complicated.

Regarding b, as shown in Figure 4, 21, even if the smallest original is A4 size, the width of the transport system due to the mechanical limitations of the transport system must be considered, and the distance must be set so that the original does not hit the side plate and be damaged. Set to .

In addition, as shown in FIGS. 6 and 7, the movable original guide 1
And in an apparatus having a fixed layer document guide 1',
When inserting a document along the document guide 1 without moving the document guide 1, that is, without dropping it downward, the detectors Sa and Sb shown in FIGS. 3 and 4 are used, and the control described above is performed. is the same as

Further, if the document size is large and the document cannot be inserted because it hits the right side plate when inserted along the document guide 1, the document guide 1 can be pushed down and the document can be inserted along the document guide 1'.

Document guide 1 is A4゜B4 size, document guide 1 is
' is used for A3 size.

Regarding the fort interloper guide movable detector 5d3Q shown in FIG. 6, when Sd is detected as "0", it indicates that the movable guide 1 is up; The guide 1 is shown in a lowered state.

As shown in FIG. 7, in the case of insertion along the document guide 1', that is, in the case of 5d=1, the following is determined as in the case of FIGS. 3 and 4 described above.

Moreover, as shown in FIG. 8, the conveyance mechanism of the present invention is
Since the original is inserted along the original guide side regardless of the original size, two sensors may be placed at the position of the sensor or on both sides of the extension line of the guide.

If the detectors were to be provided corresponding to the width of the document, a sensor would be required each time for A4, B4, A3, etc., as shown in FIG. 8, and the number would increase.

As explained above, according to the present invention, the movable document guide is provided adjacent to the fixed document guide, and the output of the guide movable detector indicating the vertical movement of the movable document guide is arranged on each side of the document reading line. By logical combination with the output of the original presence/absence detector, it is possible to detect the size of various originals and the skew and diagonal insertion of the original, which makes it possible to prevent damage to the original and transport the original in the best possible condition. Can be done.

[Brief explanation of the drawing]

Figure 1 is a diagram for explaining a conventional document conveyance system;
The figure is a diagram explaining the control system of the document conveying device of the present invention.
The figure is an explanatory diagram of an embodiment of the present invention, FIG. 4 is a diagram showing an example of diagonal insertion of a document, FIG. 5 is a diagram showing an example of a sensor circuit, and FIG. 6 is a document conveyance with a movable document guide. 7 is a diagram illustrating an example of the case where the movable document guide of FIG. 6 is pushed down and a document is inserted diagonally, and FIG. 8 is a diagram illustrating an example other than the present invention. 1...Document guide (movable guide), 1'...
Fixed document guide, 2... Insertion slot line,
3...Reading line, 4...Left side plate, 5
...Right side plate, 6...Manuscript, 7...
...Target, 8...Judgment, 9...Control device, 10...Transfer, 11...Operation, 1
2...disturbance, 13...manuscript, 14...
...Setting position, 15...Measurement, 16...
...Feedback, 17...Document guide extension line, 18...Detection sensor Sa, 19...
...Detection sensor 5b120...Optimum document setting position, 21...Document side plate contact portion, 22.
...Light emitting diode (LED), 23...
・Phototransistor (photo Tr), 24...
...Schmitt circuit or comparator, 25.
...Resistance R1, 26...Resistance R2, 27
...Fixed guide extension line, 28...Detection sensor SC, 29...Original setting optimum position, 3
0... Photo ink clubter guide movable detector Sd, 31... Number of sensors.

Claims (1)

[Scope of utility model registration request] In a document conveying device that sets a conveyance position by guiding one side edge of a document with a fixed document guide, there is provided a document guide that is movable up and down adjacent to the fixed document guide, and a guide that indicates the vertical movement of the movable document guide. a movable detector; and document presence/absence detectors disposed on each side of an extension line of fixed and movable document guide surfaces that contact one side edge of the document and on the document reading line, and the guide movable detection device 1. A document conveyance device, characterized in that document conveyance drive and stop are controlled based on a logical combination of a display on a device and an output signal from a document presence/absence detector corresponding to the display.