JPS62112465A - Input/output device - Google Patents

Abstract

PURPOSE:To omit a paper sensor and wiring member and an assembling process required for the paper sensor and to reduce the number of parts and manhours by arranging a reading part in front of a recording part in a recording paper carrier and extending the array length of a reading element group of the reading part longer than that of a recording element group of the recording part. CONSTITUTION:The reading part is arranged on the upper side of the carrier to detect recording paper by the reading part. The length lp of the recording element group is 1,728dot-216mm when linear density is 8dot/mm. The length of the reading element group is lp+2e and the (e) is constituted of an additional element group for monitoring the carriage of the recording paper. At the passage of the recording paper through the reading part 8, the recording paper is detected by a method similar to the reading method of the original. A signal from the reading part is inputted to a system control part or the like in the device and decided by a mu-CPU or the like. When the recording paper is carried in a prescribed range and reached to a prescribed position of the recording element group, printing is started. When the recording paper is carried on the outside of the prescribed range, the operation is judged as abnormal one and the recording operation is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an input/output device such as a facsimile.

(Prior art) In facsimile machines, there are those in which one feed roller is provided for both transmission and reception (see Japanese Utility Model Publication No. 58-22353), and those in which the transmission and reception heads are integrated (Japanese Patent Laid-Open No. 58-22353).
6-34273) is known.

However, in this case, the document and recording paper transport paths are separate, making the apparatus large and complicated. Although there are other examples in which the conveyance path is partially shared, there are no examples in which the head is integrated in combination to achieve miniaturization.

Furthermore, a sensor is provided between the roll paper holding section and the recording section to detect the presence or absence of recording paper (terminus detection) and the remaining amount, resulting in a problem of high cost.

(Object of the Invention) The present invention has been made to improve the problems of the prior art described above, and aims to promote common use, simplify the configuration, and realize miniaturization and cost reduction of the device. It provides input/output devices.

(Structure of the Invention) In order to achieve the above object, a reading unit that reads a manuscript;
and a recording section for recording necessary information on the recording paper, the reading section is arranged in front of the recording section on the conveyance path for conveying the recording paper, and the arrangement length of the reading element group in the reading section is made longer than the array length of the recording element f group in the recording section so that the reading section can detect the conveyance of the recording paper.

(Example) Embodiments will be described in detail below based on the drawings.

FIG. 1 shows an embodiment of the present invention, in which 1 is a document table, 2 is a separation roller, 3 is a separation piece, 4 is a recording paper roll, 5 is a feeding roller, 6 is a tension roller, and 7 is a separation piece.
10 is a feed roller, 10 is a head unit configured by integrating the reading section 8 and recording section 9, 11 and 12 are fixed blades and rotary blades that constitute a cutter, 13 is a discharge roller, 14 is a tension roller, and 15 is a stacker. It is.

In the above configuration, the original is separated from the document table into four sheets at a time by the separation roller 2 and the separation piece 3 and pulled out.
After being read by the reading unit 8, the paper is discharged to the stacker 15 by the discharge roller 13. At this time, head unit 1
0 moves to the left by a distance of e/2, or the feed roller 7 moves to the right by the same distance, and the reading unit ε3 reads the feed knee 1-l/11. X suitable (61 month, contact L2, reading becomes possible, ma) 2 cutter does not work. On the other hand, regarding recording, the leading edge of the recording paper that is pulled out from recording paper number 1 is fed out and is between roller 5 and feeding roller 7, so when the recording signal comes, the leading edge of the recording paper is fed out from feed roller '37
The recording unit 911. -To be sent. After recording, the recording material advances further, is cut by a cutter, and is discharged to a stacker 15 by a discharge roller 13.

At this time, either the head unit 10 moves to the right by a distance of R/2, or the feed 0-rough moves to the left by the same distance, and the recording unit 9 moves to the feed port-1-sheet 7. Appropriate contact is made and recording becomes possible. The cut and unrecorded recording paper is pulled back to the initial position by the feed roller 7 and the feed roller 71'j-roller 5. The illustration of the drive system is omitted.

The present embodiment configured as described above includes a head unit 10 that integrally includes a reading section (contact sensor) and a recording section (thermal head), and a single feed roller 7 that serves both for reading and writing. By relatively displacing only a small distance, reading and recording become possible, the conveyance path and conveyance drive system can be shared, and it is possible to significantly reduce costs and miniaturize drawings.

FIG. 2 shows a mechanism for displacing the feed roller 7. As shown in FIG. The position of the feed roller 7 indicated by a solid line in parentheses is the position at the time of recording, and the one-dot chain line is the position at the time of reading. The lever 18 is pulled against the urging force of the compression spring 17 by the suction of the solenoid 1G, and the lever 18 rotates around the fulcrum 19, displacing the feed roller 7 and moving it from the recording section to the reading section. Switch. In order to facilitate the movement of the feed roller rough during switching, the solenoid 20 may be sucked to lift the head unit 10 against the biasing force of the compression spring 21. The solenoid 20 is provided to temporarily hold the head unit 10 by suctioning the document or recording paper when it arrives, and to ensure that the document or recording paper is held in its mouth. Depending on the conditions, it may no longer be necessary.

FIG. 3 shows a mechanism for displacing the head unit 10, contrary to FIG. 2. The lever 24 is pulled by the suction of the solenoid 22 against the biasing force of the compression spring 23, and the lever 24 rotates around the fulcrum 25, displacing the head unit 10 and switching from the reading section to the recording section. . Note that the levers may be moved using a motor and a cam instead of a solenoid.

In conventional devices, in general, the presence or absence of recording paper in the conveyance path of the recording paper leading to the recording section, the jam of the recording paper, and the shape and size (paper width) of the recording paper in devices that can be used with different sizes of recording paper. A paper sensor for detection is required.

However, in recent years, as demands for miniaturization, increasing the number of eaves, and lowering costs have increased, restrictions on the mounting location of these sensors have become stricter. It has become difficult to implement components. Furthermore, problems may occur during assembly, adjustment, and other operations. In the present invention, by arranging the reading section on the L side of the conveyance path as described above, it is possible to detect the recording paper using the reading section. There is no need to provide a sensor.

Conventionally, input/output terminal devices and the like have been able to read A3 or B4 size documents, and record A4 size documents, that is, read A3 or 84 width documents and convert them to A4 size when sending. There is a device that sends it out. In this case, if the linear density of the main scanning line is the same for reading and recording, the number of reading elements is required to be greater than the number of recording elements.

Even in the present invention, in which the reading section is arranged in front of the recording section on the conveyance path of the recording paper, the length of the recording element group of the recording section 9 can be adjusted to correspond to the width of the recording paper, as shown in FIG. 4, for example. The length of A4 and the length of the reading element group (including the LED group and photosensor element group) of the reading section 8 are set to be the length of B4 that can read an 84-width document. In addition, the positional relationship between the recording element group and the reading element group is centered, and the cotton density is set to 8 dots in the main scanning direction.
/mm, Q, = A4 = 216nvn = 1728 d
otn, = 84 = 256 in = 204
8 dat.

When recording paper (A4) is set and the recording operation begins,
From the position of the recording paper shown in FIG. 4(a), it passes through the reading section 8 and reaches the recording section 9, where a printing operation begins. Here, when the recording paper passes through the reading section 8, the recording paper is detected in the same manner as when reading a document.

When the recording paper is set at a predetermined location and conveyed, the signal read by the reading unit 8 passes through the center area excluding the part a in FIG. 4, and the recording paper is generally white. Therefore, a signal as shown in FIG. 4(b) is obtained. Figure 4 (
The signal b) is obtained by processing the analog signal from the reading section 8 into a binary signal. When setting and transporting recording paper,
Although it cannot be said to be accurate only about the amount of a due to some deviations and paper size errors, it is sufficient to determine and process the errors specified by the apparatus. For recording paper detection,
When the signal shown in FIG. 4(b) (a±α is recognized) is obtained, it can be confirmed that the recording paper is conveyed in a predetermined manner.

Next, if the recording paper is conveyed as shown in Figure 5(a) and the signal from the reading section is obtained as shown in Figure 5(b), then if the recording paper is conveyed as it is, it will not be printed correctly on the recording paper. You can tell when it's gone. That is, the recording paper is conveyed to the position shown in FIG. 6, and the portion d is not printed on the recording paper, resulting in missing information. When the recording paper is conveyed to the position shown in FIG. 5(a) in this way, it is possible to control the apparatus, such as stopping the apparatus or warning the operator, as it is determined that the paper is not being conveyed in a predetermined manner. . Even if the recording paper is conveyed obliquely, a signal as shown in FIG. 5(b) can be obtained.

The signal from the reading unit is generally input to the device's system control unit, etc., and judgment is made by a μCPU, etc.
These judgments are easy. FIG. 7 shows an example of a flow in which the system control unit or the like makes a determination based on the signal shown in FIG. 5(b). If the result in FIG. 7 is II NO II, the recording paper has been conveyed within a predetermined range, and when the recording paper reaches a predetermined position in the recording element group, printing starts.

If the result is "YES", it means that the paper is being transported outside the predetermined range, and it is determined that there is an abnormality, and measures such as stopping the recording operation are taken.

The above is a configuration in which the reading width of the reading section is 84 size and the recording width is A4 size, and the detection method related to the recording paper uses the part a where the array length of the reading element group is longer than the array length of the recording element group. However, even if the reading width and recording width are both A4 size, by arranging a small number of additional reading elements on both sides of the A4 size reading width, it can be treated as the part corresponding to a above. , similar detection of recording paper can be performed. Even if the linear density of this added portion is "coarser" than the linear density of the reading element group, it is possible to detect the recording paper.

gP in Figure 8 is the length of the recording element group, and the linear density is 8 dots.
/nn+, it is 1728 dat, 216 mm. The length of the reading element group is I! p+2e, where e is composed of an additional element group for monitoring the conveyance of the recording paper.

If the e6 portion of the reading element group has the same linear density as the recording element group, it will have the same number of dots. Since it is sufficient that the recording paper can be detected in the portion e, the linear density does not have to be the same as that of the other portions. For example, 4 dots/mm or 2 dots/■ is sufficient. If e is 2 dots/nyo and 8 dots, then 4
It becomes mm. That is, Q, nun + (4X 2 )
mm is the array length of the reading element group, and the number of dat at that time is 8dots+1728dots+8dots=1744dots
It becomes t.

When reading the original in this case, if the document is transported at the same position as A4 size recording paper, the read image signal will be 1744.
dot, discarding 8 dat on both sides and getting 1728 do
By treating only t as an image signal, the original can be read correctly. As is well known, the reading section can be driven at this time by inputting necessary lock inputs, timing signals, etc. corresponding to 1744 dots to the reading section.
This is the same as when driving dat.

In addition, when detecting recording paper, the LEDs used as illumination means for the reading element group can be detected by lighting only the LEDs at specific locations, which reduces power consumption and prevents the head unit from heating up. can do.

FIG. 9 shows a specific example of recording paper width detection.

For example, the reading section 8 can read A3 size, and the recording section 9
is capable of recording in B4 size, and the recording paper roll 4a is A4 size.
The recording paper roll 4b is available in two sizes: B4 size. In addition, the normal (standby state) is the reception mode, and the roll paper used last time is fed to the reading section so that the paper width can be detected. Here, A4 size paper is set in that condition. The operation will be explained below: (1) The leading edge of the A4 size roll paper is returned by y using the reading and feeding roller 5a. → Original reading (reading operation omitted).

→After reading, feed the leading edge of the A4 size roll paper to the reading section using the feeding roller 5a (receiving mode).

■ After detecting the recording paper width (A4) for A4 size recording paper, feed the paper directly to the recording section. →Record (recording operation omitted) →Return to normal after recording is complete (
reception mode).

(2) After detecting the recording paper width (A4) for B4 size recording paper, move the leading edge of the A4 size roll paper back by y using the feeding roller 5a. →Feeding roller 5b
Feed the leading edge of the B4 size roll paper into the recording section, →Record (recording operation omitted), →After recording, return the leading edge of the B4 size roll paper to the reading unit (receiving mode).

This makes it possible to detect the recording paper roll width (conventionally, a separate sensor was provided). In the operation explanation, the paper width used last time was used as a standby state (set in the reading unit), but A4
Alternatively, it is also possible to select one of B4 that is used more frequently and always set that one.

(Effects of the Invention) As described above, according to the present invention, the reading section is arranged before the recording section of the recording paper conveyance path, and the array length of the reading element group of the reading section is set to By making the length longer than the array length of the group, the reading section can detect the presence or absence of recording paper, jams, the shape and size of the recording paper, etc., eliminating the need for the conventional paper sensor and reducing the wiring materials required for it. Since the assembly process is no longer necessary, it is possible to achieve a significant cost reduction due to a reduction in the number of parts and man-hours, and it is also possible to downsize the device.

[Brief explanation of drawings]

Fig. 1 is a block diagram of one embodiment of the present invention, Fig. 2 is a block diagram of a feed roller displacement mechanism and a drive system of the feed roller in the same embodiment, and Fig. 3 is a head unit in another embodiment. A configuration diagram of the displacement mechanism, FIG. 4 is a diagram showing the detection state and its detection signal when the recording paper is being conveyed normally,
Fig. 5 is a diagram showing the detection state and its detection signal when the recording paper is conveyed in a misaligned manner, and Fig. 6 is a diagram showing the positional relationship between the recording section and the recording paper when the recording paper is conveyed in a misaligned manner. Figure 7 is a diagram showing a flow for determining whether recording paper conveyance is normal or abnormal, and Figure 8 is a diagram showing a flowchart for determining whether recording paper transport is normal or abnormal. FIG. 9, which is a diagram showing another embodiment provided, is a diagram showing a specific example of recording paper width detection. 1...Original table, 2...Separation roller, 4.
4a, 4b - recording paper roll, 5.5a, 5b - feeding roller, 7... feed roller, 8 -
...Reading section, 9...Recording section, 10...Head unit, 13...Ejection roller, 15...
Stacker, 16, 20. 22... Solenoid. Figure 1 Figure 2 Figure 3 Figure 4 (a) Figure 5 (a)

Claims (1)

[Claims] It has a reading section that reads a document, and a recording section that records necessary information on recording paper, and is configured such that the reading section is located in front of the recording section on a conveyance path that conveys the recording paper, and An input/output device characterized in that the array length of the reading element group in the reading section is longer than the array length of the recording element group in the recording section, and the reading section performs detection related to conveyance of recording paper. .