JPH0734571B2 - Equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention has a facsimile device for sending documents, charts, etc. through a communication line, and in particular, has a function of reading both sheet-like originals and originals with a thickness such as books. The present invention relates to a facsimile machine.

[Conventional technology]

6 and 7 are sectional views showing a conventional facsimile machine, FIG. 6 shows a state in which a sheet-like original is fed, and FIG. 7 shows a state in which a thick original such as a book is fed. In the figure, (1) is a glass plate, (2) is a laterally movable illumination light source such as a fluorescent lamp, (3a) to (3c) are also horizontally movable reflective mirrors, (4) Is a lens,
(5) is a photoelectric conversion element. Reference numeral (6) is a document feed roller, which transmits the rotation of the pulse motor (7) to the timing pulley (9) via the timing belt (8) as shown in the perspective view of the power transmission path of FIG. The document feed roller (6) is configured to rotate in the direction of arrow A, which is the document feed direction. Returning to the description of FIGS. 6 and 7, (10) is a document discharge roller (not shown) that is rotated by power, and (11) and (12) are the document feed roller (6) and the document discharge roller ( Pressing rollers 10) and (13a) and (13b) are automatic paper feeding rollers which are rotated by unillustrated power. (14) is pressing rollers (11), (12) and automatic feeding upper roller (13a)
The door (14) rotates around the lower left part of the door (14) so that the right side can be opened slightly upward for maintenance in case of trouble such as jamming of the sheet-like document (15). (16) is an outer box, (17) is a document table, and (18) is a document table.

Next, the operation will be described. When reading a sheet-like document (15) as shown in FIG. 6, the sheet-like document (15) placed on the document table (17) is automatically fed by the automatic paper feed rollers (13a), (1
3b) sequentially feeds one by one in the direction of the reading section (19), and is sandwiched between the document feed roller (6) and the pressure roller (11) to run, and then the document discharge roller (10) and the pressure roller (10). It is ejected to the document tray (18) by 12). The light emitted from the illumination light source (2) illuminates the surface of the original (15) as shown by the path (20), is reflected by the reflection mirrors (3a) to (3c), passes through the lens (4) and is photoelectrically converted. The document (15) is read by being incident on the conversion element (5). The reading of the document (15) is performed in synchronization with the rotation of the pulse motor (7).

On the other hand, the case of reading an original having a thickness such as a book will be described with reference to the sectional view of the facsimile machine shown in FIG. The manuscript (21) such as a book is opened downward and placed on the glass plate (1).

The illumination light source (2) and the reflection mirrors (3a) to (3c) keep the distance of the light path (20) from the document (21) to the lens (4) constant as compared with the case of FIG. It has moved slightly to the right. As in the case of FIG. 6, the light that illuminates the original document (21) such as a book enters the photoelectric conversion element (5) through the path (20), and the original document (21) is read. The illumination light source (2) and the reflection mirrors (3a) to (3c) move in the direction of arrow B while keeping the distance of the light path (20) from the document (21) to the lens (4) constant, In synchronization with the movement, the document (21) is sequentially read from the leading end to the trailing end.

[Problems to be solved by the invention]

Since the conventional facsimile apparatus is configured as described above, it is necessary to have a power for moving the illumination light source (2) and the reflection mirrors (3a) to (3c) and a transmission mechanism therefor. Space was needed, so
There is a problem that the device becomes large and expensive at the same time. Further, a glass plate (1) for reading a thick original such as a book is required, and this glass plate requires the same area as the original, so that there is a problem that the device becomes large.

The present invention has been made to solve the above problems, and is to obtain a small and inexpensive device that can read both a sheet-shaped original and an original having a thickness such as a book. With the goal.

[Means for solving problems]

A facsimile apparatus according to the present invention includes a document feeding roller that is driven to rotate by power from a drive source, a discharge roller that discharges a document, an encoder that obtains an output signal according to the rotation of the document feeding roller, and the document feeding roller. One-way rotating means provided in the transmission path of the power to the roller, capable of rotating the document feeding roller in the document feeding direction without being restricted by the power, the document feeding roller and the discharge There is a pressing roller that holds the original document together with the roller to feed the original document, and a developing means that can be developed at a predetermined angle from the original document feed roller around the discharge roller, and a fixing means that is fixed to the original document feed roller. A reading unit provided at a position is provided, and the document is read in synchronization with the output signal of the encoder.

[Action]

The facsimile machine according to the present invention, in the case of a thick original such as a book, keeps the pressing roller away from the original feeding roller, uses the same reading unit as in the case of a sheet original, and manually feeds the original on the original feeding roller, Since the reading is performed in synchronization with the output signal from the encoder according to the rotation of the document feed roller, the document can be read without fixing the illumination light source and the reflection mirror and without the glass plate.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. First
1 and 2 are cross-sectional views of a facsimile machine according to an embodiment of the present invention. FIG. 1 shows a state in which a sheet-shaped original is fed, and FIG. 2 shows a state in which a thick original such as a book is fed. In the figure, (22) is a guide plate, the illumination light source (2) and the reflection mirrors (3a) to (3c) are fixed at predetermined positions, and the door (1
4) rotates 180 ° to the left around the lower left part with the pressure rollers (11), (12) and the automatic paper feed upper roller (13a) attached from the state of FIG. It can be put into a state. The platen (17) is attached to the door (14) and moves.

In addition, the lens (4), the photoelectric conversion element (5), etc. are the sixth
The description is omitted because it is the same as the conventional example shown in FIGS.

FIG. 3 is a perspective view showing the power transmission path of the document feed roller (6), and the rotation of the pulse motor (7) is transmitted to the timing pulley via the timing belt (8). The timing pulley (9) has a built-in one-way clutch (23) as shown in the sectional view of FIG. There is a wedge-shaped gap (27) between the inner ring (25) fixed to the shaft (24) and the outer ring (26) provided on the outer periphery of the inner ring (25), and there are a plurality of rollers (28) having different outer diameters. ) Is fitted, and the roller (28) is pressed by the spring (29) through the roller retainer (30) with a force in the direction from the one having the larger outer diameter to the one having the smaller outer diameter. When the outer ring (26) rotates in the direction of arrow A, the roller (28) is tightened between the outer ring (26) and the inner ring (25), so that the rotation of the outer ring (26) is transmitted to the inner ring (25). Axis (2
4) also rotates in the direction of arrow A. On the contrary, when the shaft (24) rotates in the direction of arrow A, the gap (27) loosens with respect to the roller (28), so that the shaft (24) is fixed even if the outer ring (26) is fixed.
Can rotate freely in the direction of arrow A.
The shaft (24) is coaxially fixed to the document feed roller (6), and the outer ring (25) is coaxially fixed to the timing pulley (9).
Therefore, the document feeding roller (6) can freely rotate in the direction of arrow A. Further, the document feeding roller (6) on the side opposite to the side on which the timing pulley (9) is provided in FIG.
A disk-shaped rotary encoder (31) having radial slits at equal intervals is fixedly provided coaxially with the document feeding roller (6) at the end of the, and passes through the slit from a light source (not shown). The amount of rotation of the document feed roller (6) can be detected by detecting the incoming light with a photoelectric conversion element (not shown).

FIG. 5 is a block diagram of an electric circuit for synchronizing document reading.

(32) is a control circuit that outputs a switching signal depending on whether the original is a sheet or a thick one such as a book, and (33) is a photoelectric conversion element (34) that converts light that has passed through the slit of the encoder. An encoder input circuit that receives the generated electrical signal,
(35) generates a read start signal, and the photoelectric conversion element (5)
Is a timing signal generating circuit that causes the reading circuit (36) to output a signal read from the document as image data, and (37) is a motor drive circuit that supplies drive power to the pulse motor (7).

Next, the operation will be described. When reading a sheet-like document, as in the conventional example shown in FIG. 6, as shown in FIG. 1, the sheet-like document (15) placed on the document table (17) is fed by an automatic paper feed roller ( 13a) and (13b) sequentially feed the sheets one by one toward the reading section (19), and the original feed roller (6).
It is held by the pressure roller (11) and travels. The timing pulley (9) shown in FIG. 3 has the one-way clutch (23) shown in FIG. 4 built-in, but the arrow transmitted from the pulse motor (7) to the timing pulley (9) via the timing belt (8). The rotation in the A direction is transmitted to the original document feeding roller (6) without idling and the original document feeding roller (6) rotates in the direction of arrow A. Figure 1 manuscript (1
5) passes through the reading section (19), and the document discharge roller (1
0) and the pressing row (12) discharge the document to the document tray.

The light emitted from the illumination light source (2) follows its path (20).
Illuminate the original (15) surface as shown in, and set the reflection mirror (3a).
Or (3c), the light enters the photoelectric conversion element (5) through the lens (4), and the original (15) is read. The reading of the document (15) is performed in synchronization with the rotation of the pulse motor.

On the other hand, the case of reading an original having a thickness such as a book will be described with reference to a sectional view of the facsimile machine in FIG. Door (14)
With the pressure rollers (11) and (12) and the automatic paper feed upper roller (13a) attached, open 180 degrees to the left around the lower left part. The document (21) such as a book is opened downward and placed on the guide plate (22), and is gently moved in the direction of arrow C while being pressed against the document feed roller (6) by hand. At this time,
The document feed roller (6) is restrained by the pulse motor (7) stopped in the document feed direction A by the one-way clutch (23) shown in FIG. 4 built in the timing pulley (9) of FIG. It can rotate freely without being damaged. Also,
The rotary encoder (31) directly connected coaxially with the document feed roller (6) also rotates, and a signal synchronized with the rotation of the document feed roller (6) is obtained, that is, the rotation amount of the document feed roller (6), that is, the document. Since the moving amount of (21) can be detected, the original (21) is read by the photoelectric conversion element (5) in synchronization with the moving amount of the original (21) as in the case of the sheet-like original of FIG. be able to. The read part of the document (21) is supported by the open door (14).

Synchronization of document reading will be described with reference to the block diagram of FIG. A push button (not shown) is selectively scanned and a control circuit (32) is operated to send a switching signal to a timing signal generating circuit (35) depending on whether the original is a sheet or a book having a thickness.

First, when the original is a sheet, the timing signal generation circuit (35) generates a reading start signal and a motor drive signal at predetermined timings, and the reading start signal is sent to the reading circuit (36), whereby photoelectric conversion is performed. The signal input from the element (5) is output as image data, and the motor drive signal is sent to the motor drive circuit (37), which supplies electric power to the step motor (7) to drive it. Next, if the original is thick like a book, the photoelectric conversion element (34) of the encoder outputs a signal corresponding to the amount of movement of the original.
The encoder output signal sent from the encoder through the encoder input circuit (33) is converted into the reading start signal by the timing signal generation circuit (35) and sent to the reading circuit (36), which inputs from the photoelectric conversion element (5). The output signal is output as image data.

In the above embodiment, the facsimile machine is provided with the automatic paper feed rollers (13a) and (13b), the document discharge roller (10) and its pressing roller (12), so that when a document such as a book having a large thickness is read. Although the automatic paper feed upper roller (13a) and the pressure roller (11) are moved away from the automatic paper feed lower roller (13b) and the document discharge roller (10) respectively, in the case of the Fukushimari device without such rollers, It is not necessary to use the pressing roller (11) and the document feeding roller (6).
All you have to do is move away from it.

Further, in the above embodiment, the one-way clutch is shown as a roller with a roller, but a claw wheel has a similar effect.

Further, in the above embodiment, the control circuit is operated by selectively scanning with the push button depending on the type of the original, but a switch interlocking with the door may be provided and the control circuit may be operated by opening and closing the door.

〔The invention's effect〕

As described above, according to the present invention, when reading an original having a thickness such as a book, the developing means can be opened and the original can be moved by hand while pressing the original against the original feeding roller, and the original can be read. The completed part is supported by the pressing roller provided in the moving means, so that the manuscript can be moved stably, and the reading part is fixed, so the reading part is highly reliable and stable. Accurate reading is possible. Further, since the amount of movement of the original is detected by the encoder and the original is read in synchronization with this, it is not necessary to provide power for moving the illumination light source or the reflection mirror and its transmission mechanism, Since a space for the above movement is not necessary and a glass plate is also unnecessary, the device is capable of reading both a sheet-like original and a thick original such as a book, which is small and inexpensive. There is an effect obtained the location.

[Brief description of drawings]

FIG. 1 is a sectional view showing a case of reading a sheet-like document of a facsimile machine according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a case of reading a document such as a book with the facsimile machine of FIG. FIG. 3 is a perspective view showing a power transmission path of a document feeding roller used in the facsimile machine of FIGS. 1 and 2, and FIG. 4 is a sectional view of a one-way clutch incorporated in the timing pulley of FIG. Fig. 5 shows Fig. 1 and 2
FIG. 6 is a block diagram of an electric circuit for synchronizing the document reading of the facsimile machine, FIG. 6 is a sectional view showing the case of reading a sheet-like document of the conventional facsimile machine, and FIG. 7 is the fax machine of FIG. 8 is a sectional view showing a case of reading a document such as a book, and FIG. 8 is a perspective view showing a power transmission path of a document feeding roller used in the facsimile machine of FIGS. 6 and 7. In the figure, (6) is a document feeding roller, (11) is a pressing roller, (23) is a one-way clutch, and (31) is a rotary encoder. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. An original feeding roller which is rotationally driven by power from a drive source, a discharge roller which ejects an original, an encoder which obtains an output signal according to the rotation of the original feeding roller, and an output roller for the original feeding roller. A unidirectional rotating unit that is provided in the power transmission path and that is not restricted by the power and that can rotate the document feeding roller in the document feeding direction; and the document feeding roller and the discharge roller together with the document. And a pressing roller for nipping the original to feed the original, and a developing means that can be developed at a predetermined angle from the original feeding roller around the vicinity of the discharge roller, and provided at a fixed position with respect to the original feeding roller. And a reading unit.