JPS6031356A - Original feeder in facsimile - Google Patents

Abstract

PURPOSE:To eliminate the need for a discharge sensor without deteriorating the function of original feeding by setting a scheduled time when the tip of an original reaches a discharge roller from the detection to a counter at the detection of an original by a sensor. CONSTITUTION:The number of pulse (a) of a motor required to feed an original P by a distance (d) between a reading section 9 and the discharge roller 10 is preset to the 1st counter 16. The number of pulses (b) feeding the original slightly longer than the normal original is set to the 2nd counter 17. When the tip of the original does not reach the reading section 9 even if the counter 16 counts the set value (e), the counter 17 awaits the setting value (b), and when a sensor 2 is turned off even after the confirmation of the setting value (b), an output 1 of the counter 17 clears both the counters via an OR gate 15, the output of the counter 16 is changed from 0 to 1, a clutch 14 is turned on and the original is fed. Since the distance from the original reading section to the discharge roller is measured in advance and the roller is turned by the number of pulses of the motor corresponding to the said distance, a sensor at the position of discharge roller is not required.

Description

[Detailed description of the invention] Regarding location.

When transmitting multiple originals in sequence, the feed roller that supplies the originals to the reading unit reliably separates and supplies only the first original, and simultaneously supplies the second and subsequent originals. To avoid this, the rotation must be controlled using a clutch or the like.

Therefore, as shown in Figure 1, conventional facsimile machines
1) to the reading section (2), and a discharge port roller (4) for discharging the original (1) that has passed through the reading section (2) to the outside of the machine. Sensors (5) (6) are installed near the part (2) and at the position exiting the discharge port (4), respectively.
When the reading sensor (5) detects the leading edge of the first document (1-1), reading starts, and when the ejection sensor (6) detects the leading edge, the feeding roller (3) The rotation of the document (1-1) is stopped, and the sensor (5) reads the end of the document (1-1).
) is detected, rotate the feed roller (3) again and
The original sheet (1-2) was supplied to the reading section (2). However, the presence of the ejection sensor (6) is an impediment to miniaturizing the facsimile, and a large number of sensors increases the possibility of malfunction due to detection errors, which is not preferable.

The present invention has focused on the above-mentioned circumstances and has succeeded in removing the ejection sensor (6) without degrading the conventional document feeding functions.

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 schematically shows a facsimile transmission section according to the present invention. A plurality of documents σ placed on the document table (7) are supplied to the reading section (9) by a feed roller (8), and are discharged to the outside of the machine by a discharge roller (10). Both rollers (8) and (10) are commonly driven by a pulse motor (M), and the feed roller (8) is provided with an electromagnetic clutch that turns on/off power transmission from the motor (M). (S
1) is a first sensor that detects whether or not there is a document (G) on the placing table (7), and (S2) is a first sensor that detects whether or not there is a document (G) on the placing table (7);
This is a second sensor that detects the presence or absence of a document (1.) in ). The second sensor (S2) is a photocoupler consisting of a light emitter (S2-1) and a light receiver (S2-2), and when the light from the light emitter (S2-1) is blocked by the document (P), The light receiver (S2-2) indicates OFF.

FIG. 3 shows a circuit related to the document feeding device of this facsimile. ”2 The terminal of the first sensor (Sl) is connected to the second sensor (Sl).
S2) and the pulse generating circuit (11), respectively,
The other terminal of the second sensor (S2) is connected to the clutch control circuit (12) along with input from the transmission button.

One of the outputs of the clutch control circuit (12) is an anti-game)
(13) to the clutch (14), the other output goes to the two counters (16) (
17) are respectively supplied to the clear terminals. Each of the counters (16) and (17) is connected to the drive circuit (
A pulse generation circuit (11) that supplies driving pulses to (18)
) are simultaneously supplied, and the output of the first counter (16) is passed through the inverter (19) to the other input terminal of the anti-game 1-(13), and the output of the second counter (17). The output is connected to the other input terminal of the OR gate (15). The first counter (16) records the motor rotation required to feed the document (P) with the feed roller (8) by the distance (d) between the reading section (9) and the ejection roller (10) in FIG. The number of pulses (a) for this is set in advance, and the output becomes 1 when the set value (a) is reached. The second counter (17) assumes in advance the length of the document (P) that is longer than the length of the document (P) that is normally used and is used relatively infrequently, and sends the document of this length to the feed roller (8). The number of motor rotation pulses (b) necessary to send the pulse is set, and the output becomes 1 when the set value (1) is reached.

The operation of the document feeding device described above will be described with reference to flowchart 1 shown in FIG.

First, by placing a plurality of originals (P) on the original placing table (7), the first sensor (Sl) turns on, the light emitter (S2-1) lights up, and the second sensor (S2) turns on. is turned on, the motor drive circuit (18) is operated by the pulse generation circuit (11) to drive the motor (M), and the clutch control circuit (12) is turned on and its output is output to the OR gate (15). ) through each counter (16)
(17) is cleared and the output 0 of the first counter (16) is inverted by the inverter (19), so an output 1 is output from the AND gate (13) and the clutch (14) is turned on (step ). Clutch control circuit at this time (1
The output from 2) to the OR gate (15) is kept constant until a transmit button (described later) is pressed, and the output from both clutches (16)
(17) is maintained in a clear state. At this time, since the feed roller (8) rotates, the document (p) is moved to the lowest document (
P-1) Only one sheet is sent out, reaches the reading section (9), and turns off the second sensor (S2).
), as a result, the output from the clutch control circuit (12) to the AND gate (13) becomes O, and the clutch (1
When the bleeding is turned off (step ■), the feeding of the original (P-1) is stopped. Next, by pressing the send button after making a phone call, etc. (step ■), the clutch control circuit (
12) is activated to release the counters (16) and (17) (step ■) and turn on the clutch (14) (step ■). The original (P-1) is on the feed roller (8)
The first counter (16) receives the set value (
After confirming a) (step ■), the corresponding first counter (1
Output 1 is output from 6) and turns off the clutch (14) (
Step ■). Thereafter, the document (P-1) is fed only by the rotation of the ejection roller (10), and the second sensor (
When S2) detects the end of IjUi% (P-1) and turns ON (step ■), the document (P-1) is ejected and if the first sensor (Sl) is OFF (step [phase]) Since there is only one original to be transmitted, transmission is stopped. If the first sensor (Sl) is ON in the above step [phase]
If the sensor (31) (S2) is ON, the clutch control circuit (12) will operate and the clutch (
14) is turned ON (step @), and the feed roller (8
) supplies the second document (P-2) to the reading section (9), and the second sensor (S2) detects the leading edge of the document (step @
), and depending on the detection, each counter (16) (17)
Clear (step ◎) and return to step ■.

If the second sensor (S2) is OFF in step (3) above, that is, if the leading edge of the document (P) does not reach the reading unit (9) even after the first counter (16) counts the set value (a), Wait until the second counter (17) confirms its set value (1)) (step 0), and if the second sensor ("S2) is OFF even after confirming the set value (b), both counters (17) at the same time clear step [phase]),
As a result, the output of the first counter changes from 0 to 1, the clutch (14) is turned on (step 0), and the process returns to step (2).

As explained above, according to the present invention, the distance from the document reading section to the ejection roller is measured in advance, and the feed roller is rotated by the number of motor pulses corresponding to the distance, so that the document is at the ejection roller position. This eliminates the need for a sensor to detect the arrival of the facsimile, making it possible to make the facsimile transmitter more compact.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional facsimile transmitter, and is a flowchart for explaining the operation of the facsimile transmitter.

Claims (1)

[Claims] A feed roller that supplies the document to the reading section, a sensor that detects the presence or absence of the document in the reading section, an ejection roller that ejects the document that has passed the reading section, a motor that drives both of the rollers, and a sensor that detects the presence of the document in the reading section. It includes a clutch that turns on and off power transmission to the feed roller, and a counter that provides the operating time of the clutch, and when the sensor detects the document, the leading edge of the document reaches the ejection roller from the time of detection. A document feeding device for a facsimile machine, characterized in that a scheduled time is set in the counter.