JPH0591241A - Equipment - Google Patents

Abstract

(57) [Summary] [Purpose] Compact, inexpensive, and easy to assemble. [Structure] 21 is a document guide, 6 is a first detection switch for detecting the insertion of a document, 9 is an image sensor, 22 is a reading roller pressed against the image sensor 9, 7 is a second detection switch, and 23 is a document. It is a discharge roller. The reading roller 22 starts the paper feeding operation by the first detection switch 6 and starts the paper returning operation by the second detection switch 7. When the document reaches the second detection switch 7, the leading edge of the document is returned to the reading position of the image sensor 9 by the reading roller 22 and the reading is started. The discharge roller 23 receives rotation transmission from the same drive source so as to convey it in the same direction as the reading roller 22. The discharge roller 23 is connected by a one-way clutch that transmits the rotation transmission from the drive source only in the document feeding direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to control of start of original reading in the facsimile machine.

[0002]

2. Description of the Related Art In a facsimile apparatus, in order to start reading a document to be transmitted by a document reading unit, it is necessary to detect that the reading start portion of the document reaches the document reading unit by some method. In the case of a facsimile machine equipped with an automatic paper feed mechanism, since the original is always sent to the reading section by the automatic paper feed roller at a constant speed, the detection method is relatively easy, but on the other hand, it is expensive, and depending on the model, automatic Some do not require paper feed.

FIG. 6 shows the control of the start of reading a document in a facsimile machine which is not equipped with an automatic paper feed mechanism. FIG. 6 is a schematic side view of a conventional facsimile machine, and FIG. 7 is a flowchart showing the same operation.
In these figures, reference numeral 50 designates a document 65 and a document guide 51.
An insertion opening 52 for inserting the document into the document guide 52, and first detection switches 52 and 53 for detecting the insertion of the document exposed in the document guide 51.
Of the detection switch 52, 54 is a second detection switch, 55 is a document reading unit, 56 is a reading roller which is pressed against the document reading unit to convey the document, 57 is a document discharge port, and 60 is a document discharge port. In the recording section, roll paper 6
1, a printing unit 62 and a platen roller 63.

Next, the operation will be described. In step 200, the document 65 is inserted into the document guide 51, and in step 201
When the first detection switch 52 is turned on, the motor of the transmission system starts operating in step 202 and the feed roller 53 starts rotating, and the monitoring timer of the second detection switch 54 operates in step 203. To start.

Then, when the second detection switch 54 is turned on in step 204, it is calculated from the distance from the second detection switch 54 to the reading position of the reading portion 55 and the feed speed of the feed roller 53 in step 205. After the elapse of the feeding time, the operation of the transmission system motor is stopped, and the rotation of the feed roller 53 is also stopped. At this point, it is determined that the reading start portion of the document has reached the reading position of the reading unit 55, and the reading unit 55 starts reading the document.

If the second detection switch 54 does not turn on even after the monitoring time of the monitoring timer has elapsed in step 204, it is determined in step 207 that the monitoring timer predetermined value has exceeded, and in step 208 the first detection switch Look at 52. When the first detection switch 52 is in the ON state, it is determined that the document is in the document guide 51, and the state of the second detection switch 54 is checked again. First detection switch 5
When 2 is in the OFF state, it is determined that the document has been pulled out from the document guide 51, and the state returns to the initial state.

[0007]

However, the above-mentioned conventional facsimile apparatus requires the feed roller for feeding the document to the reading section at a constant speed, which requires a large number of parts related to the feed roller. However, there is a problem in that the size becomes large and the cost becomes high, and moreover, a lot of assembly work time is required. The present invention has been made in view of the conventional problems described above, and an object of the present invention is to provide a small-sized, inexpensive, and easily assembled facsimile apparatus.

[0008]

In order to achieve this object, a facsimile apparatus according to the present invention includes a first detection switch for detecting the insertion of a document, and a first detection switch behind the first detection switch. An original reading unit provided, an original reading roller that is pressed against the original reading unit and rotates in a direction in which the original is fed by a signal from the first detection switch, and an original placed behind the original reading roller A second detection switch for detecting the passage of the original reading roller, and a control unit for controlling a means for inverting the reading roller and driving the original to a reading start position by a detection signal of the second detection switch are provided. It is a thing. Further, the facsimile apparatus according to the present invention has a first detection switch for detecting the insertion of a document, a document reading section arranged behind the first detection switch, and a pressure contact with the document reading section. An original reading roller that rotates in the direction in which the original is fed in response to the signal from the first detection switch, and a second detection switch that is disposed behind the original reading roller and detects that the original has passed the original reading roller. A control unit for controlling a unit for driving the original to a reading start position by reversing the reading roller in response to a detection signal from the second detection switch; and a rotation transmitting mechanism for transmitting the rotation from the driving source to the original reading roller. And an original that is arranged behind the second detection switch and receives rotation transmission from the rotation transmission mechanism and rotates so that the original reading roller and the original are conveyed in the same direction. A discharge roller, in which a one-way clutch that couples with the said document discharge roller and said rotation transmitting mechanism.

[0009]

In the present invention, the reading roller is reversed by the second document detecting switch disposed behind the reading roller, and the time for the reading start portion of the document to return from the second detecting switch to the document reading section is set. Since the return of the reading roller is calculated and the reading of the original is started by the original reading unit, a feeding roller other than the reading roller is not required. Further, in the present invention, since the original discharge roller and the rotation transmission mechanism are connected by the one-way clutch, the first original does not return when the second original returns to the reading unit.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. 1 is a block diagram of a facsimile apparatus according to the present invention, FIG. 2 is a schematic side view of the same, FIG. 3 is a side view of a transmission mechanism of the same, and FIG. 4 is an exploded perspective view showing a combined state of the transmission mechanism and a discharge roller. FIG. 5 is a flow chart showing the operating state of the apparatus. In FIG. 1, 1 is C
PU, 2 is a modem, 3 is a recording unit for recording on recording paper, 4 is an operation unit, 5 is a display unit, 6 is a first detection switch for detecting the insertion of an original, and 7 is that the original has passed through the reading roller. Is a second drive switch for detecting the rotation of the roller, 8 is a motor drive unit that serves as a rotation drive source of the roller, 9 is an image sensor for reading a document, and 10 is a speaker.

In FIG. 2, reference numeral 20 is a document insertion opening for inserting a document into the document guide 21, 6 is a first detection switch 6 and 9 facing the document guide 21, 9 is an image sensor constituting a document reading portion, and 22 is an image. A reading roller pressed against the sensor 9, a second detection switch 7, a document discharge roller 23, and a document discharge port 24.

Next, the rotation transmission mechanism of the reading roller and the discharge roller will be described with reference to FIGS. 3 and 4. Thirty
Is a motor, which is a step motor capable of rotating in forward and reverse directions. The rotational drive of the motor 30 is transmitted from the motor gear 31 to the reduction gear trains 32, 33, 34. Discharge roller gear 37
Is transmitted to each. The rotation directions of the two gears 35 and 37 are configured so that the document is conveyed in the same direction. That is, when the gear 35 is rotationally driven in the A direction, the gear 37 is rotationally driven in the B direction and both are rotationally driven in the document discharging direction.

The gear 37 and the rotating shaft 45 of the discharge roller 23 are connected by a one-way clutch 47 which transmits rotation in only one direction with respect to the rotation direction, as shown in FIG.
That is, a dowel 37a having the same diameter as that of the rotation shaft 45 is formed to project at the center of the side surface of the discharge roller gear 37, and a one-way clutch 47 is interposed between the dowel 37a and the rotation shaft 45. The one-way clutch 47 is wound in a direction in which it closes when the gear 37 is rotationally transmitted in the document feeding direction, and transmits the rotational transmission in this direction to the rotary shaft 45.
On the contrary, the gear 37 is wound in the opening direction when the rotation is transmitted in the direction for returning the original, and the rotation transmission in this direction is idle and is not transmitted to the rotation shaft 45.

Next, the operation will be described. In FIG. 5, the document 65 is inserted into the document guide 21 in step 100,
When the first detection switch 6 is turned on in step 101, the transmission system motor starts operating in step 102 and the document reading roller 22 starts to rotate, and in step 103, the second detection switch 7 is monitored. The timer starts operating.

When the second detection switch 7 is turned on in step 104, it is calculated in step 105 from the distance from the second detection switch 7 to the reading position of the reading section 9 and the returning speed of the document reading roller 22. The motor of the transmission system reversely operates and stops for the returning time, and the rotation of the document reading roller 22 also stops. At this time, since the reading roller gear 37 and the rotating shaft 45 are connected via the one-way clutch 47, the document discharge roller 23 is stopped rotating. At this point, it is determined that the leading edge of the original has returned to the reading position of the reading unit 9, and the reading unit 9 starts reading the original. The document read by the reading unit 9 is positioned on the discharge roller 23 and stopped.

If the second detection switch 7 does not turn on even after the monitoring time of the monitoring timer has elapsed in step 104, it is determined in step 107 that the monitoring timer predetermined value has exceeded, and in step 108 the first detection switch Look at state 6. When the first detection switch 6 is in the ON state,
It is determined that the document is on the document guide 21, and the state of the second detection switch 7 is checked again. The second detection switch 7 is OF
When in the F state, it is determined that the document has been pulled out from the document guide 21, and the process returns to the initial state.

When the second document is inserted into the document guide 21, the operation starts again from step 100. Step 10
When the number reaches 2, the transmission system motor 30 starts to operate.
At this time, the rotation of the motor 30 is also transmitted to the discharge roller gear 37 and transmitted to the rotating shaft through the one-way clutch, and accordingly, the discharge roller 23 is rotated in the direction for feeding the original. By the rotation of the discharge roller 23, the first original document is conveyed toward the discharge port 24.

When step 105 is reached, the transmission system motor 30 operates in reverse. Reading roller gear 37 and rotating shaft 4
Since it is connected to No. 5 via the one-way clutch 47, the document discharge roller 23 stops rotating. Therefore, even if the first document is positioned on the discharge roller 23, it does not return to the reading roller 22.

[0019]

As described above, according to the present invention, there is provided means for driving the original to the reading start position by reversing the reading roller in response to a detection signal from the second detection switch arranged behind the reading roller. Since only the detection switch needs to be provided because of the structure having the control unit for controlling, the number of parts can be significantly reduced and the size can be reduced. Further, since the document discharge roller is disposed behind the second detection switch and the rotation drive system of this document discharge roller and the rotation drive system of the document reading roller are the same, control of the drive system does not become complicated. Moreover, the number of parts is minimal. In addition, since the original discharge roller and the drive system are connected by the one-way clutch, the original read previously does not return again,
There is an effect that the document can be discharged smoothly.

[Brief description of drawings]

FIG. 1 is a block diagram of a facsimile apparatus according to the present invention.

FIG. 2 is a schematic side view of a facsimile apparatus according to the present invention.

FIG. 3 is a side view showing a transmission mechanism of the facsimile apparatus according to the present invention.

FIG. 4 is an exploded perspective view showing a combined state of a transmission mechanism and a discharge roller of the facsimile apparatus according to the present invention.

FIG. 5 is a flowchart showing the operation of the facsimile apparatus according to the present invention.

FIG. 6 is a schematic side view of a conventional facsimile apparatus.

FIG. 7 is a flowchart showing the operation of a conventional facsimile apparatus.

[Explanation of symbols]

 1 Control Unit 6 First Detection Switch 7 Second Detection Switch 22 Document Reading Roller 23 Document Ejection Roller 37 Ejection Roller Gear 45 Rotation Shaft 47 One-way Clutch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenji Tachibana 1-6, Uchiyuki-cho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Moriyuki Fukui 1-1-6, Uchiyuki-cho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation

Claims (2)

[Claims] 1. A first detection switch for detecting the insertion of a document, a document reading section arranged behind the first detection switch, and the first reading switch pressed against the document reading section. A document reading roller that rotates in the direction in which the document is fed in response to a signal from the detection switch, a second detection switch that is disposed behind the document reading roller and detects that the document has passed the document reading roller, and the second detection switch. And a control unit that controls a unit that drives the original to a reading start position by reversing the reading roller according to a detection signal from the detection switch. 2. A first detection switch for detecting the insertion of a document, a document reading section disposed behind the first detection switch, and the first reading switch pressed against the document reading section. A document reading roller that rotates in the direction in which the document is fed in response to a signal from the detection switch, a second detection switch that is disposed behind the document reading roller and detects that the document has passed the document reading roller, and the second detection switch. A control unit that controls a unit that drives the original to a reading start position by reversing the reading roller according to a detection signal from the detection switch; a rotation transmission mechanism that transmits rotation from a drive source to the original reading roller; And a document discharge roller which is arranged behind the detection switch and rotates so that the document reading roller and the document conveying direction are the same in response to the rotation transmission from the rotation transmission mechanism. A facsimile machine, comprising: a one-way clutch that couples the document discharge roller and the rotation transmission mechanism.