JPH0652922B2 - Input / output unit - Google Patents

Description

TECHNICAL FIELD The present invention relates to an input / output unit such as a facsimile or a terminal device.

 2. Description of the Related Art Conventionally known technologies include, for example, Japanese Patent Application Laid-Open No. 56-34273 "Head for transmitting and receiving" and Japanese Utility Model Publication No. 58-22353 "Facsimile apparatus".

The former has a problem in that the sending and receiving heads are integrated, but the transport paths are separate, so the device is large and complicated.

In the latter, the transmission / reception roller is also used, but the transport path is separate.

In addition, there are some examples in which the conveyance path is partially shared, but there is no example in which the head is integrated to reduce the size.

Object The present invention has an object to reduce the size and cost of an input / output unit and facilitate mounting in a facsimile or the like.

Configuration To achieve the above object, an input / output unit of the present invention includes a reading unit that reads a document, a recording unit that records image information on a recording sheet, and a conveyance roller that conveys the document and the recording sheet.
A head unit that arranges the reading unit on the upstream side in the transport direction and the recording unit on the downstream side is provided, and the state or shape of the recording paper is detected via the reading unit during recording.

According to the above configuration, one conveying roller is also used for conveying the original and the recording paper, and the state or shape of the recording paper is detected by the reading unit. The shape detection sensor can be omitted, resulting in a reduction in the number of parts and a significant cost reduction.

Embodiment FIG. 1 is a diagram showing the outline of the configuration of an input / output device in which the input / output unit of the present invention is mounted in a device, 1 is a document table, 2 is a separation roller, 3 is a separation piece, 4
Is a reading unit, 5 is a discharge roller, 5'is a tension roller, 6 is a stacker, 7 is a feed roller, 8 is a feeding roller, 8'is a tension roller, 9 is a recording paper roll, 10 is a recording unit, and 11 is a fixed blade. , 12 are rotary blades, and 13 is a head unit.

The document moves from the top of the document table 1 to the left, and the separation roller 2
Then, the sheets are separated one by one by the separating piece 3, read by the reading unit 4, and then discharged onto the stacker 6 by the discharging roller 5.

At this time, the reading unit 4 moves to the left by half of a, or the feed roller 7 moves to the right by the same amount and comes into contact with the feed roller (reading roller) 7 to enable proper reading. Also, the cutter does not work.

On the other hand, regarding recording, there is a leading edge of the recording paper fed from the recording paper roll 9 between the feeding roller 8 and the feeding roller 7. When a recording signal comes, the feeding roller 8 feeds the leading edge of the recording paper to the left side, Sent to part 10.

After the recording, the recording medium is further moved to the left side, and is cut by a cutter composed of a fixed blade 11 and a rotary blade 12 and discharged by a discharge roller 5. At this time, the recording unit 10 moves to the right by half of a, or the feed roller 7 moves to the left by the same amount, and
Proper recording is possible by touching the (platen roller) 7.

Further, the remaining paper after cutting is pulled back to the initial position by the feed roller 7 and the feeding roller 8. The drive system is omitted.

As described above, the reading unit (contact sensor) 4 and the recording unit (thermal head) 10 are integrally formed with the head unit 13 and the single reading / writing feed roller 7 is moved by a relatively small amount to read the data. And the recording can be performed respectively, the transport path and the transport drive system can be shared, the cost can be significantly reduced, and the size can be easily reduced.

FIG. 2 (a) is an illustration of a method for moving the feed roller, and FIG. 2 (b) is an illustration of a drive system.

Here, the solid line indicates recording and the alternate long and short dash line indicates reading.

In FIG. 2 (a), 14 is a solenoid; roller, 15
Is a solenoid; head contact / separation, 16 and 17 are compression springs, 18 is a lever, 19 is a fulcrum shaft, 20 is a fulcrum, and 7 and 13 are first
It is the same feed roller and head unit as described in the figure.

In FIG. 2 (b), 21 and 21 'are gears, 22 is a drive gear on the transmitting side, 23 is a drive gear on the receiving side, and 24 is a feed roller shaft.
(When sending), 25 is the feed roller axis (when receiving), 26 is the fulcrum axis,
27 is a belt and 28 is a pulley.

Solenoid: The position of the feed roller 7 is switched from the reading unit 4 to the recording unit 10 by suction of the roller 14. When switching, the solenoid; the head contact / separation 15 may be sucked to facilitate the operation.

Solenoid: Head contact / separation 15 is for sucking the paper when it comes to the reading unit or the recording unit to improve gripping, and then immediately returns it to the original position to improve transportability. Contact pressure, transport force, etc. It is not necessary depending on the conditions of.

As for the driving relationship of the rollers, as shown in FIG. 2 (b), the rotation of the motor is transmitted by the belt 27 to the integrated pulley 28 and gear 21 'which are rotatably supported by the fulcrum shaft 26. Gear 21 fixed to the feed roller shaft 24
The feeding roller 7 is rotated by informing the user.

FIG. 3 shows a case where the head unit is made to move contrary to FIG. 2, 7 is a feed roller, 13 is a head unit, 15 is a solenoid; 15 is a head contact / separation, and 15 'is a solenoid: head. , 16 and 17 are compression springs, 18 is a lever, and 20 is a fulcrum.

Similar to FIG. 2, the solid line is switched to the alternate long and short dash line by suction of the solenoid. The lever may be moved by using a motor and a cam instead of the solenoid.

FIG. 4 is a diagram showing the basic configuration of the head unit.
Is a reading unit, 10 is a recording unit, 13 is a head unit, 29 is a recording side driver circuit, and 30 is a reading side driver circuit.

A terminal device or the like that performs recording employs a method in which a required number of sensors for detecting the presence or absence of recording, jam during conveyance, paper size, and the like are provided.

A photo sensor is usually used as this sensor, and it is mounted at a predetermined position.

However, with the demand for smaller size, lighter weight, and lower cost, the restrictions on the mounting location of these photosensors become strict, and the power supply wire to be provided to the center, the wire for extracting signals, the connector, etc. Also in terms of mounting, the realization method becomes difficult.

In order to mount, problems will occur in the mounting part mounting, assembly work, adjustment work, and the like.

This head unit is a unit that realizes the above-mentioned sensor that is suitable for both the recording and the reading in order to meet the demands for downsizing, weight saving, ... A photo sensor for detecting the presence or absence of the recording paper, a jam at the time of conveyance, a paper size, etc. as a unit capable of turning on only a predetermined portion of a light source group that illuminates an object surface for reading a document. It has a configuration that can be used as a light source of.

This eliminates the above-mentioned problems in mounting, miniaturization, and the need for a new light source as a photosensor for recording paper detection or the like. The more light, thin, short, and small the effect is.

When reading a document, all the light sources are turned on, and when detecting the recording paper, the light sources are turned on within a predetermined range capable of detecting the recording paper. Therefore, an interface for selecting the light source provided in the head unit is provided.

5 (a), (b), and (c) are conventional light sources (LE) for reading originals.
D) and lighting circuit are shown.

In Fig. 5 (a), one line consists of N blocks of LED groups,
The one block shows that n LEDs are connected in series. L is a required length in the main scanning direction.

In FIG. 5 (b) and FIG. 5 (c), D and E are LED lighting interfaces, and an LED consisting of N blocks consisting of 1 block n LEDs is shown in FIG. 5 (b). LED ON
Supply the required power from the signal terminal. FIG. 5 (c) shows this supply circuit.

FIG. 6 shows an example of a light source and a lighting circuit according to another conventional configuration. Here, 31 is a wear resistant layer.

This is an example in which LEDs are arranged in two rows and arranged on both sides of the read sensor.

In this conventional example, when the LEDs are driven, the entire line emits light, and the light source is turned on only at a predetermined portion for detecting the recording paper or the like.

FIG. 7 shows a connection example of the light source group in the head unit shown in the frame in the present invention.

In FIG. 7 (a), A, B, C, D, and E indicate interfaces (I / F), and AI / F is a lighting I / F that detects skew of recording paper.

BI / F is a lighting I / F that detects the presence or absence of recording paper.

The CI / F is also used as the lighting I / F and AI / F that detect the width of the recording paper.

EI / F is the lit I / F when reading a document.

DI / F is a common I / F for supplying current.

This is an example of a single-row configuration, of the light source group of one scanning line,
In the example in which three points of c, e, and k are turned on, compared to FIG. 5, A, B, and C can be connected so that the light source is turned on only at predetermined points and can be externally connected.

When scanning a document, apply a current to the I / F of DE and
The scanning line length is turned on.

Next, in the case of detecting the recording paper, the A / B / C I / Fs are used, and a current is supplied to each of the D-A, D-B, and DC I / Fs as necessary. It can be flowed to a required place and a predetermined place can be turned on.

FIG. 7 (b) is an enlarged example of k block in FIG. 7 (a).

In this case, it is an example of connection in which three LEDs 2, 3, 4, out of the four LEDs of the k block are turned on.

This can be either two or one within the detection range of the recording paper, and if four LEDs need to be turned on, the LED indicated by the dotted line
It is sufficient to add (additional amount) as a configuration. In this example, A, B, and C can be turned on independently.

FIG. 8 is a diagram showing another embodiment of the present invention.

The configuration of this head unit is an example in which it is possible to light a predetermined location at the same time with one I / F line, and in the input / output device, the predetermined location has already been determined and is fixed. , Can be realized by an easier method.

In this example, in order to turn on three points of c, e and k, I of D-X
You just need to send current to / F.

Effects As described above, according to the present invention, a single conveyance roller is also used for conveying a document and a recording sheet, and a head unit is provided which arranges the reading section on the upstream side in the conveying direction and the recording section on the downstream side. Since the reading unit detects the state or shape of the recording paper, the conventional sensor for detection can be omitted, and the cost can be significantly reduced by reducing the number of parts and mounting man-hours. Further, there is an advantage that the size can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing the outline of the configuration of an input / output device in which the input / output unit of the present invention is mounted in a device, FIG. 2 (a) is an explanatory diagram of a method for moving a feed roller, and FIG. 2 (b) is FIG. 3 is an explanatory view of the drive system, FIG. 3 is a view when the head unit is moved in the opposite manner to FIG. 2, and FIG. 4 is a view showing a basic configuration of the head unit, FIG. 5 (a), ( b) and (c) are diagrams showing a conventional light source (LED) and a lighting circuit for reading a document, FIG. 6 is a diagram showing an example of a conventional light source and a lighting circuit, and FIG. FIG. 8 is a diagram showing a connection example of a light source group in a head unit shown in a frame in the invention, and FIG. 8 is a diagram showing another embodiment of the invention. 1 ... Original table, 2 ... Separation roller, 3 ... Separation piece, 4 ... Reading section, 5 ... Ejection roller, 5 ', 8' ... Tension roller, 6 ... Stacker, 7 ... Feed roller , 8 ... feeding roller, 9 ... recording paper roll, 10 ... recording section, 11 ... fixed blade, 12 ... rotating blade, 13 ... head unit, 14 ... solenoid; roller, 15 ... solenoid; Head contact / separation, 15 ′ …… solenoid; head, 16,17 …… compression spring, 18 …… lever, 19 …… fulcrum shaft, 20 …… fulcrum, 21,21 ′ …… gear, 22 …… transmitting side Drive gear, 23 …… Reception side drive gear, 24 …… Feed roller shaft (during transmission), 25 …… Feed roller shaft (during reception), 26 …… Support shaft, 27 …… Belt, 28 …… Pulley, 29 …… Recording side driver circuit, 30 …… Reading side driver circuit, 31 …… Abrasion resistant layer.

Claims (1)

[Claims] 1. A reading unit for reading an original, a recording unit for recording image information on a recording paper, a conveying roller for conveying the original and the recording paper, the reading unit on the upstream side in the conveying direction, and the recording unit on the downstream side. An input / output unit comprising: a head unit for arranging the above, and detecting the state or shape of the recording paper via the reading unit during recording.