JPS6340513B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a facsimile transmitting device, and more particularly to a planar scanning type facsimile transmitting device having an automatic paper feeding section.

A conventional facsimile transmission device includes a document tray on which a document is placed flat, and a document holding plate that is pivotally supported on the side facing the document supply side of the document tray so as to be openable and closable, and presses and holds the document when closed. If you want to load a document to be sent into this device, place a sheet of the document flat on the document table by artificial means, and then press the document holding plate from above to place the document. When transmitting multiple documents in succession, the operator cannot leave the facsimile transmitter during transmission.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a facsimile transmitting device that eliminates the above-mentioned drawbacks and is capable of automatic paper feeding that enables continuous unattended transmission.

The facsimile transmission device of the present invention that achieves the above object is activated by a document placement plate on which a plurality of documents are placed and a document detection signal disconnection, and feeds out one document from among the plurality of documents. an automatic paper feeding section that includes a feeding roller that stops in response to the generation of a document detection signal; a return belt that rotates in the opposite direction to the feeding roller while pressing the feeding roller; and an automatic feeding section that detects the fed document. a conveyance means comprising: a document detector that generates the document detection signal; and a conveyance roller that conveys the document supplied from the feed roller in a forward direction during normal rotation and in a return direction when reversed; a document holding plate for placing the original on a flat surface; a document holding plate that is rotatably supported on the side facing the document supply side of the document placing table and presses and holds the original when closed; and the document placing plate; An opening/closing means is provided on the table and opens and closes the document holding plate when the conveyance roller is in operation and closes the document holding plate when the conveyance roller is stopped. and a document scanning unit formed by a document scanner, and a document scanning unit configured to rotate the document in the forward direction in response to activation of the feed roller, and stop the document after a specific time elapses after the document detection signal is generated, thereby positioning the document at a predetermined position on the document table. a conveyance control circuit that controls the automatic paper feed section, the conveyance means, and the document scanning section so as to convey the document until the original document is conveyed until the original document is conveyed until the original document is conveyed until the original document is conveyed until the original document is conveyed until the document is conveyed until the document is conveyed until the document is conveyed until the document is conveyed until the document is conveyed until the document is conveyed until the document is conveyed until the document is conveyed by reversing the conveyance roller after scanning is completed. shall be.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a main part of a mechanism showing one embodiment of the present invention, and FIG. 2 is a block diagram of a drive circuit in the embodiment shown in FIG.

One embodiment of the present invention includes an automatic paper feeder 10 including a document placement plate 11 and a feeding roller 13, and a conveyance means 2 including a document detector 21 and a conveyance roller 22.
0, a document scanning section 30 including a document mounting table 31, a document holding plate 32, and an opening/closing means 33, and a conveyance control circuit 100.

Next, the operation of the embodiment shown in FIG. 1 will be explained with reference to the block diagram shown in FIG. 2, the time chart shown in FIG. 3, and the schematic side views shown in FIGS. 4, 5, and 6. do.

First, a plurality of originals 12 are set on the original placing plate 11 of the automatic paper feeder 10, and then the power of the apparatus is turned on. is in the initial position, the initial position switch 45 is in contact with the actuating plate 46, the pinch roller 23 is in contact with the transport roller 22, and the original holding plate 32 is in an upwardly opened state as shown in FIG. It's summery.

In this case, as shown in FIG.
Therefore, voltage +e1 is generated from the transport control circuit 100 as the motor control signal m1, and the second
As shown in the figure, an output is supplied from the motor power supply 101 to the motor 15, and the motor 15 is started. A feeding roller 13 is connected to the electric motor 15, and rotation of the electric motor 15 causes the feeding roller 13 to rotate counterclockwise. Further, the rotation of the electric motor 15 is transmitted to the return belt 14 via the belt 16, and the return belt 14 is rotated in the opposite direction to the rotation of the feed roller 13.

Here, the frictional force between the feeding roller 13 and the document surface is τ1, and the frictional force between the return belt 14 and the document surface is τ1.
2. Letting the frictional force between the surfaces of the originals be τ3, the respective frictional forces are set to have the relationship expressed by equation (1).

τ1>τ2>τ3...(1) Therefore, the lowermost document 12' in contact with the feed roller 13 is fed forward by the rotation of the feed roller 13, and at the same time, the document 12' is fed forward by the rotation of the return belt 14. Since the document 12 stacked on top of the document is subjected to a rearward force, only the document 12' is separated and fed out, and is conveyed along the document conveyance path 1 as shown in FIG.

Next, when the leading edge of the document 12' is detected by the document detector 21 of the transport means 20, a document detection signal a is generated as shown in FIG. After the first time _t1 has elapsed, the transport control circuit 100 eliminates the motor control signal m1, and the motor 15 stops. Here, the first
The time t ₁ is the time during which the original 12' moves the distance between the original detector 21 and the transport roller 22, and is therefore determined by the arrangement of the original detector 21 and the transport roller 22.

That is, after the original 12' is inserted into the conveyance roller 22, the leading edge of the original 12' will be detected by the original detector 21.
If the leading edge of the document 12' is detected by the document detector ₂₁ before it is inserted into the transport roller 22, the first time _t1 is zero. This time corresponds to the transport time from when the leading edge of the original 12' is detected by the original detector 21 until it is inserted into the transport roller 22. Therefore, in the exemplary embodiment, the first time t ₁ is zero.

On the other hand, regarding the conveyance roller 22, since the initial position switch 45 is closed, an initial position signal b is generated and supplied to the conveyance control circuit 100, and the conveyance control circuit 100 outputs a voltage -e1 as a motor control signal m2.
is generated and supplied to the motor power supply 102. The electric motor 26 is activated by the output from the electric motor power supply 102, and the conveying roller 22 connected to the electric motor 26 is rotated clockwise as shown in FIG.

After a second time _t2 has elapsed after starting the electric motor 26, the motor control signal m2 is converted from voltage -e1 to voltage +e1 in the conveyance control circuit 100, and the converted signal is supplied to the motor power supply 102. The motor power supply 102 switches the rotational direction of the motor 26 in accordance with the polarity conversion of the motor control signal m2, and switches the rotation of the conveyance roller 22 counterclockwise as shown in FIG. Therefore, after switching the rotational direction, the document 12' fed from the delivery roller 13 is conveyed in the advancing direction.

Here, the second time t ₂ is as shown in FIG.
If the traveling distance of the document 12' after passing the document detector 21 until it leaves the conveying roller 22 is _l1 , and the traveling speed of the document is s, then the setting is as shown in equation (2).

t ₂ = l ₁ /s ...(2) In other words, the first time t ₁ and the second time t ₂ are:
When the first time t ₁ is zero, the second time t ₂ is a finite value, and when the first time t ₁ is a finite value, the second time t ₂
has a relative relationship such that is zero.

Next, as described above, after the document detection signal a is generated and supplied to the conveyance control circuit 100, a third time period is elapsed.
After _t3 has elapsed, the motor control signal m2 is canceled by the transport control circuit 100, the output from the motor power supply 102 is cut off, and the motor 26 is stopped. Therefore,
At that point, the conveyance of the original 12' is completed, and the original 12' is placed on the original placing table 31.

Here, the third time t ₃ is as shown in FIG. 4, where l ₂ is the travel distance from when the leading edge of the document 12' passes the document detector 21 to a predetermined position x on the document table. It is set as shown in equation (3).

t ₃ =l ₂ /s (3) Therefore, the position x is determined by the setting of the third time t ₃ , and the leading edge of the document can be placed at the same position.

Next, in response to disappearance of the motor control signal m2, the motor control signal m3,
Voltage +e1 is generated as m4, respectively, and is supplied to motor power supplies 103 and 104, respectively, and motor 2
Rotate 7 and 34. The electric motor 27 is connected to a rotating shaft 25, and the support rod 24 on which the pinch roller 23 is supported is fixed to the shaft 25.

Therefore, when the electric motor 27 rotates, it performs an arcuate motion with the shaft 25 as the axis and the support rod 24 as the radius of rotation, and the pinch roller 23 is lifted upward. The motor control signal m3 is generated after the fourth time _t4 required for the pinch roller 23 to rotate by a predetermined angle has elapsed.
It disappears in the conveyance control circuit 100, the output from the motor power source 103 is cut off, the motor 27 stops, and the pinch roller 23 is held as shown in FIG.

Further, the rotation of the electric motor 34 rotates a pulley 37 via a pulley 35 and a belt 36 of the opening/closing means 33. Since the pulley 37 and the eccentric cam 39 are fixed to the shaft 38, the rotation of the electric motor 34 causes the eccentric cam 39 to rotate. The motor control signal m4 is the fifth time required for the eccentric cam to rotate half a revolution.
The conveyance control circuit 100 is set so that the signal m4 disappears after _t5 has elapsed, and therefore, when the motor control signal m4 disappears, the output from the motor power source 104 is cut off and the motor 34 is stopped. As a result, the eccentric cam 38 changes from the initial state shown in FIG. 4 to the state shown in FIG.

In the embodiment, the part of the original holding plate 32 that holds down the original is formed of a transparent plate.
Scanning light from an optical scanning means (not shown) is irradiated from above 2 to perform main scanning.

Next, in response to disappearance of the motor control signals m3 and m4, a motor control signal m5 is generated in the conveyance control circuit 100, the output from the motor power supply 105 is supplied to the motor 41, and the motor 41 rotates to rotate the belt 42. The feed screw 43 is rotated through the feed screw 43. A split nut 44 fixed to the document scanning section 30 is engaged with the feed screw 43, and the document scanning section 30 is guided by a guide rod 48 to move in the direction of the arrow in FIG. 1 to perform sub-scanning. .

When sub-scanning is started, the initial position switch 45
The actuating plate 46, which had been actuating it, is separated, the initial position switch 45 is turned off, and the initial position signal b disappears. Although the document detection signal a also disappears while the document scanning unit 30 is moving, the motor control signal m1 is not generated during the period when the motor control signal m5 is output, thereby preventing the feeding roller 13 from malfunctioning. .

Next, when the operating plate 46 contacts the scan end switch 47, a scan end signal c is generated, and the motor control signal m5 is changed to voltage +e1 in the transport control circuit 100.
Converts the voltage from -e1 to voltage -e1 and supplies it to the motor power supply 105. The motor power supply 105 reverses the rotation direction of the motor 41 using the polarity-converted motor control signal m5. Thereby, the document scanning section 30 moves in the return direction, and when the operating plate 46 operates the initial position switch 45, the initial position signal b is generated, the motor control signal m5 disappears, and the motor 41 is stopped. Further, a document detection signal a is generated.

Here, the transport control circuit 100 receives a scan end signal c
Based on this signal and the document detection signal a, the transport control circuit 100 generates a voltage -e1 as a motor control signal m3, and supplies it to the motor power supply 103. The motor power source 103 rotates the motor 27 in the opposite direction when inserting the original, and lowers the pinch roller 23 in response to a motor control signal m3 having a polarity opposite to that for original insertion described above. Since the motor control signal m3 disappears after the fourth time _t4 has elapsed, the pinch roller 23 returns to contact the conveyance roller 22 by the same angle as in the previous case and stops.

Further, at the same time as the motor control signal m3 is generated, voltage +e1 is generated as the motor control signal m4, and is supplied to the motor power supply 104 to rotate the motor 34. Since the motor control signal m4 disappears after the fifth time _t5 has elapsed, the rotation of the motor 34 causes the eccentric cam 38 to rotate half a turn to open the document holding plate 32 upward, as shown in FIG. The situation will be as shown.

Next, in response to disappearance of the motor control signals m3 and m4, voltage -e1 is generated as the motor control signal m2 in the transport control circuit 100, and the motor power supply 102
supplied to The motor power source 102 rotates the motor 26 in the opposite direction when inserting the document in response to the motor control signal m2 having the opposite polarity to that when inserting the document described above, and therefore the conveying roller 22 rotates clockwise as shown in FIG. The document 12' is conveyed in the return direction and ejected from the document table 31.

When the leading edge of the document 12' passes the document detector 21, the document detection signal a disappears, and the document 12' is removed from the transport roller 22 after the aforementioned second time _t2 has elapsed after the document detection signal disappears. Further, at that point, the polarity of the motor control signal m2 is converted to voltage +e1 as described above, and therefore, the rotation direction of the motor 26 is reversed, and the conveying roller 22 rotates counterclockwise.

On the other hand, in the automatic paper feeding section 10, a voltage +e1 is generated as a motor control signal m1 in response to disappearance of the document detection signal a, and is supplied to the motor power supply 101. The electric motor 15 is rotated by the output from the electric motor power source 101, and the feed roller 13 of the automatic paper feeder 10 is rotated by the output from the electric motor power source 101.
is rotated to feed out the next document 12'' and return to the initial state. That is, the time T shown in FIG. 3 is one cycle of document insertion, scanning, and ejection.

By repeating the above-described operations, the plurality of originals 12 set on the original placing plate 11 are automatically transmitted after being inserted, scanned, and ejected one by one.

As explained above, in the embodiment of the facsimile transmission device according to the present invention, the case where the original scanning unit is moved for sub-scanning is shown, but this is just an example, and the original scanning unit is fixed and the optical Sub-scanning may be performed by moving the scanning means, in which case the initial position switch and the end-of-scanning switch may be provided in the optical scanning means to achieve the object of the present invention.

In addition, the original holding plate is made of a transparent plate.
Instead of the original holding plate, the original placing part of the original placing table may be made transparent, and scanning light may be irradiated from below the original scanning part, and the scope of the present invention is not limited to this embodiment. do not have.

As described above, the facsimile transmission device of the present invention is equipped with an automatic paper feeding section, a conveyance means, an opening/closing means, and a conveyance control circuit. By repeating the process of transporting each sheet one by one to a predetermined position on the document tray and then ejecting the document after scanning, it is possible to automatically send the documents one after another, making it possible to automatically feed documents that enable continuous unattended transmission. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part of a mechanism showing an embodiment of the present invention, FIG. 2 is a block diagram of a drive circuit in the embodiment shown in FIG. 1, and FIG. 3 is for explaining the operation of FIG. 1. FIG. 4 is a schematic side view when a document is inserted to explain the operation in FIG. 1; FIG. 5 is a schematic side view when a document is placed to explain the operation in FIG. FIG. 6 is a schematic side view at the time of document ejection for explaining the operation of FIG. 1. In FIGS. 1 and 2, 1... document transport path, 10... automatic paper feed section, 11... document placement section,
12, 12', 12''... Original, 13... Feeding roller, 14... Return belt, 15, 26, 27, 3
4,41...Electric motor, 16,36,42...Belt, 20...Transporting means, 21...Document detector, 2
2... Conveyance roller, 23... Pinch roller, 24
... Support rod, 25, 38 ... Axis, 30 ... Original scanning section, 31 ... Original mounting table, 32 ... Original holding plate,
33... Opening/closing means, 35, 37... Pulley, 39
... Eccentric cam, 43 ... Feed screw, 44 ... Split nut, 45 ... Initial position switch, 46 ... Operation plate, 47 ... Scan end switch, 48 ... Guide rod, 100 ... Transport control circuit, 101, 102,
103, 104, 105...Motor power supply, a...
Document detection signal, b...Initial position signal, c...Scanning end signal, m1, m2, m3, m4, m5...Motor control signal.

Claims (1)

[Claims] 1. A document placement plate on which a plurality of documents are placed; and a feed roller that starts when a document detection signal is cut off, feeds out one document from among the plurality of documents, and stops in response to the generation of the document detection signal. and a return belt that rotates in the opposite direction to the feeding roller while pressing the feeding roller; a document detector that detects the fed document and generates the document detection signal; a conveyance means including a conveyance roller that conveys the document supplied from the feed roller in the forward direction when the document is rotated, and conveys the document in the return direction when the document is reversed; and a document holder that places the conveyed document on a flat surface. a table, a document holding plate that is rotatably supported on the side opposite to the document supply side of the document table and that presses and holds the document when closed; a document scanning unit, which is provided with an opening/closing means for opening and closing the document holding plate when the holding plate is stopped and the document holding plate is made of a transparent plate; The document is conveyed to a predetermined position on the document platform by rotating in the forward direction in response to activation of the feeding roller and stopping after a specific time elapses after the generation of the document detection signal, and the conveying roller is reversed after scanning is completed. 1. A facsimile transmitting apparatus comprising: a conveyance control circuit that controls the automatic paper feeding section, the conveyance means, and the document scanning section so as to eject the document by causing the document to be ejected.