JPH0591239A - Facsimile 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, 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 includes a rotation transmission system from the drive source, the second detection switch 7 and the reading roller 22.
They are connected with a play amount almost the same as the distance between and.

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. 7 shows the control for starting the reading of a document in a facsimile apparatus which is not equipped with an automatic paper feeding mechanism. FIG. 7 is a schematic side view of a conventional facsimile machine, and FIG. 8 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, a first detection switch 52 for detecting the insertion of a document facing the document guide 51, a feed roller 53 operated by a detection signal of the first detection switch 52, and a second detection switch 54. , 55 is a document reading section,
Reference numeral 56 is a reading roller that is pressed against the document reading unit to convey the document, 57 is a document discharge port, and 60 is a recording unit, and the roll paper
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 sent in response to a signal from the first detection switch, and an original provided 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 of the original according to a detection signal from the second detection switch; A rotation transmission mechanism that transmits the rotation from the drive source to the document reading roller, and a rotation transmission mechanism that is arranged behind the second detection switch and receives rotation transmission from the rotation transmission mechanism. A document discharge roller conveying direction of La and original are rotated to be the same, in which the this the document discharge rollers and the rotation transmission mechanism and a coupling means for coupling with play.

[0009]

In the present invention, since the original discharge roller and the rotation transmission mechanism are connected with play, the first original does not return when the second original returns to the reading section. ..

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 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, and FIG. 4 is an exploded perspective view showing a combined state of the transmission mechanism and a discharge roller. 5 and 5 are side sectional views showing the operating states of the transmission mechanism and the discharge roller, and FIG. 6 is a flow chart showing the operating state of the apparatus. In FIG. 1, 1 is a CPU, 2 is a modem, 3 is a recording unit for recording on recording paper, 4 is an operating unit, 5 is a display unit, 6 is a first detection switch for detecting the insertion of an original, and 7 is an original. A second detection switch for detecting the passage of the reading roller, 8 is a motor drive unit that serves as a rotation driving source of the roller, 9 is an image sensor for reading a document, and 10 is a speaker.

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

Next, the rotation transmission mechanism of the reading roller and the discharge roller will be described with reference to FIGS. Reference numeral 30 is a motor, which is a step motor capable of rotating in the forward and reverse directions. The rotation drive of the motor 30 is performed from the motor gear 31 to the reduction gear train 3
2, 33 and 34. One of the rotation transmissions is the reading roller gear 35 of the reading roller 22 and the other is the intermediate gear 3.
6 is transmitted to the discharge roller gears 37 of the discharge roller 23 via 6, respectively. 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 so that the document is conveyed in the discharge direction.

The gear 37 and the rotary shaft 45 of the discharge roller 23 are coupled with each other with a play in the rotational direction, as shown in FIG. That is, an engaging protrusion 37a is provided on a part of the side surface of the discharge roller gear 37, and an engaging protrusion 40a that engages with the engaging protrusion 37a is provided on a part of the side surface of the disc cam 40. At the center of the discharge roller gear 37, the rotary shaft 4
5 is provided with a slidable slide hole 37b, and the disc cam 40 is provided with a D cut hole 40b fitted to the D cut portion 45a of the rotary shaft 45. The gear 37 slides on the rotary shaft. It freely rotates, and the cam 40 rotates integrally with the rotating shaft. Therefore, when the gear 37 is rotated by the rotational drive from the motor 30, the rotation is transmitted from the engagement protrusion 37a to the engagement protrusion 40a with a play amount L as shown in FIG. The play amount L is provided to be substantially the same as the distance from the second detection switch 7 to the reading position of the reading unit 9.

Next, the operation will be described. In FIG. 6, 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 to operate and the document reading roller 22 starts to rotate in step 102, and the second detection switch 54 is monitored in step 103. 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 disc cam 40 are connected with play, the document discharge roller 23 stops 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 reaching 2, the motor 30 of the transmission system starts to operate, and along with this, the engaging projection 37a of the discharge roller gear 37 is also shown in FIG.
As shown in (a), after rotating counterclockwise and rotating by the amount of play L, it engages with the engaging protrusion 40a of the disc cam 40 to rotate the disc cam 40 counterclockwise and the ejection roller 23 to the document ejection direction. Rotate to. 1 by rotation of the discharge roller 23
The first document is conveyed toward the discharge port 24.

When step 105 is reached, the transmission system motor 30 operates in reverse. Along with this, the engagement protrusion 37a of the discharge roller gear 37 also rotates clockwise as shown in FIG. 5B, but the play amount L is almost equal to the distance from the second detection switch 7 to the reading position of the reading unit 9. Since they are provided in the same manner, the engaging protrusion 37a does not reach the position for engaging with 40a during the engaging operation during the reverse rotation of the motor 30, and stops at the position indicated by the chain double-dashed line in the figure. After all, the disc cam 40 does not rotate, and the discharge roller 23 does not reverse. 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, the means for inverting the reading roller and driving it to the reading start position of the document is controlled by the detection signal of the second detection switch arranged behind the reading roller. Since the control section is provided, only the detection switch need be structurally provided, and 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. Further, since the original discharge roller and the drive system are connected with play, the original read previously does not return again, and the original 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 side sectional view showing an operating state of a transmission mechanism and a discharge roller of the facsimile apparatus according to the present invention.

FIG. 6 is a flowchart showing the operation of the facsimile apparatus according to the present invention.

FIG. 7 is a schematic side view of a conventional facsimile apparatus.

FIG. 8 is a flowchart showing the operation of a conventional facsimile apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 control part 6 1st detection switch 7 2nd detection switch 22 document reading roller 23 document discharge roller 37 discharge roller gear 37a engaging protrusion 40a engaging protrusion

 ─────────────────────────────────────────────────── ─── 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 (1)

[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. A control unit for controlling the means for inverting the reading roller and driving it to the reading start position of the document according to the detection signal of the detection switch; a rotation transmission mechanism for transmitting the rotation from the driving source to the document 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 paper discharge roller and a coupling means for coupling the rotation transmission mechanism with play.