JPH07135550A - Input output device - Google Patents

Abstract

PURPOSE:To accurately carry a sheet and to record accurate picture by arranging a recording head and a read head at an interval equal to a carrying distance by a sheet carrying rotating body to carry a recording sheet or an original sheet corresponding to the number of revolutions being an integral number of multiple of one revolution of a carrying restriction rotating body. CONSTITUTION:The interval L between a read head 15 and a recording head 16 is set so that a sheet carrying roller 7 is rotated by a predetermined integral number of revolutions and a sensor lever 14 rotated integrally with the roller 7 is in contact with a sensor 17 to start the sensor just when the sheet carrying roller 7 is rotated to carry a sheet 4 and a predetermined position on the sheet 4 reaches a position opposite to the recording head 1. Since the carrying interval of the sheet 4 is restricted in the unit of one circumferential length of the sheet carrying roller 7, the sheet 4 is carried without being affected even in the presence of eccentricity of the sheet carrying roller 7 or a gear 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input / output device which conveys a recording sheet to record an image and conveys an original sheet to read an image.

[0002]

2. Description of the Related Art A recording device and an image reading device are typical input / output devices of a computer, but these devices are currently prepared and used separately. However, the recording sheet conveying mechanism of the recording apparatus and the original conveying mechanism of the image reading apparatus for reading the original have many common parts as sheet conveying means, and a device in which the recording apparatus and the image reading apparatus are integrated has been devised.

This device can be used not only as an input / output device of a computer but also as a stand-alone copying machine, and the merit of integrating a recording device and an image reading device is extremely great.

By the way, in the above-described sheet conveying means, generally, a gear transmission mechanism or a belt transmission mechanism transmits the rotation of a motor to a sheet conveyance roller which nips and conveys a sheet, and usually obtains a predetermined torque. In addition, each of the transmission mechanisms performs a predetermined deceleration.

Here, there are various factors that affect the accuracy of sheet conveyance, but the most dominant of these factors is in the manufacturing of the drive transmission member and the sheet conveyance roller forming the transmission mechanism. Accuracy is generally due to eccentricity of drive transmission members such as gears and eccentricity of sheet conveying rollers, and efforts have been made to improve the accuracy of these members from the past.

[0006]

However, in the case of controlling the motor serving as a drive source to control the conveyance of the sheet, the accuracy of the drive transmission member such as the gear and the sheet conveyance roller is individually improved. However, in the entire drive system in which a plurality of drive transmission members are connected, there is a certain limit in the technique for improving the sheet conveyance accuracy, and it is impossible to eliminate the sheet conveyance error in the entire drive system.

On the other hand, in the conventional input / output device in which the recording device and the image reading device are integrated, since the relative arrangement of the image reading part and the recording part is not sufficiently taken into consideration, the common sheet conveyance is performed. When a document read by using the means is recorded by the same device, a deviation occurs between the reading position and the recording position, or the image reading unit and the recording unit interfere with each other to adversely affect the reading operation or the recording operation. There was a problem such as.

The present invention solves the above-mentioned problems.
An object of the invention is to input / output an apparatus in which a sheet conveying distance is regulated by a preset number of rotations of a conveying regulation rotator so that the sheet is accurately conveyed, and an image reading unit and a recording unit do not interfere with each other. Is provided.

[0009]

A typical configuration according to the present invention for achieving the above object is to convey a recording sheet to record an image, and to convey an original sheet to read an image. In the apparatus, a recording head for recording on a recording sheet, a reading head for reading an image on an original sheet, a sheet conveying rotary body for nipping and conveying the recording sheet or the original sheet, and engagement with the sheet conveying rotary body And a sheet conveying rotary body that has a driving force transmitting means including a plurality of rotating bodies that transmits a driving force and a motor that engages with the driving force transmitting means, and forms a rotor of the motor. And at least one rotating body among the rotating bodies including a plurality of rotating bodies forming the driving force transmitting means is a transport regulation rotating body, and corresponds to an integral multiple of one rotation of the transport regulating rotating body. An input-output device, characterized in that said sheet conveying rotating body is at a distance equal to the conveying distance of conveying the recording sheet or document sheet placed between the read head and the recording head.

Further, according to another structure of the present invention, in the input / output device, there is provided a registration rotator for correcting skew of the recording sheet or the original sheet and for conveying the sheet to the conveyance regulating rotator. The input / output device is characterized in that the transport operation of the resist rotation body is made to correspond to the rotation of the transport regulation rotation body.

Further, according to another structure of the present invention, in the input / output device, the recording head and the reading head are arranged so as to face each other on opposite sides of a sheet conveying path for conveying a recording sheet or a document sheet. The input / output device is characterized in that

Another structure according to the present invention is the input / output device, characterized in that the input / output device is provided with a rotation information detecting means for detecting rotation information of the transport regulation rotary member.

Another structure according to the present invention is the input / output device, wherein the rotation information detecting means also serves as a detector for feedback-controlling sheet feeding. .

[0014]

Since the input / output device according to the present invention is configured as described above, at least one preset transport regulation rotation of the rotary bodies constituting the drive system of the sheet transport means for transporting the recording sheet or the original sheet. By rotating the body a predetermined integer number of times, it is possible to accurately set each of the recording sheet and the original sheet to the recording position of the recording sheet or the reading position of the original sheet where the recording head and the reading head face each other. .

Further, in the case where the skew feeding of the sheet is corrected and the transport operation of the resist rotator for transporting the sheet is made to correspond to the rotation of the transport regulating rotator, the sheet transport rotator holds the sheet. The position can be controlled by the transfer operation of the resist rotating body. Therefore, it is possible to set the sheet sandwiching position while the sheet conveying rotating body is still rotating.

When the recording head and the reading head are arranged opposite to each other across the sheet conveying path for conveying the sheet, the recording operation by the recording head and the reading operation by the reading head are performed on the sheet. Since the operations are performed on opposite sides of the transport path, each operation is not interfered by another head.

In the case where the sheet conveying motor is used as a conveying regulation rotating body and the rotary encoder is provided as the rotation information detecting means in the sheet conveying motor, the sheet feeding is feedback-operated to improve the conveying accuracy. The detector used for control can also serve as the rotary encoder.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, one embodiment of the input / output device according to the present invention will be described in detail. FIG. 1 is an external view of the input / output device according to the present invention. The sheet supply port 5 thus provided is provided with a sheet guide 2 which serves as a guide for inserting a sheet 4 which is a recording sheet or a read original sheet into the sheet supply port 5.

On the front surface of the main body 1, there is provided an operation panel 3 for operating the input / output device.
(Communicable), LF (line feed), FF (page break), printer /
Operation buttons such as a scanner (mode switching) are arranged. A sheet discharge port 6 for discharging the sheet 4 for which recording or reading has been completed is provided below the operation panel 3.
Is provided.

FIG. 2 is a side view showing the first embodiment of the input / output device according to the present invention. The sheet 4 inserted from the sheet supply port 5 constitutes a part of the drive system of the sheet conveying means. A sheet conveying roller 7 serving as a sheet conveying rotating body and a pinch roller 8 serving as a pressure contact rotating body pressed against the roller 7.
And are pressed and clamped by and conveyed.

A gear 12 which is provided coaxially with the sheet conveying roller 7 and rotates integrally, and a gear which meshes with the gear 12.
13, a motor for sheet conveyance 10 which meshes with the gear 13
Gear provided on the drive shaft of and rotating integrally with the drive shaft
Reference numeral 11 is configured as a predetermined diameter or a pitch circle diameter of gears, and is configured as a driving force transmission means that constitutes a part of a drive system of the sheet conveying means by meshing with a predetermined gear ratio.

Further, the sheet conveying motor 10 is a drive source for driving the sheet conveying roller 7 via the driving force transmitting means, and is not shown in correspondence with a detection signal generated by a rotation information detecting means which will be described later. The controller controls the rotation of the sheet conveying motor 10.

In the present embodiment, a sensor lever 14 which rotates integrally with the roller 7 is provided coaxially with the sheet conveying roller 7 which is constituted as a conveyance regulating rotator and faces the sensor lever 14. A sensor 17 serving as rotation information detecting means is fixedly attached to the main body 1 at a predetermined position. Accordingly, the sensor lever 14 rotates integrally with the sheet conveying roller 7 and comes into contact with the sensor 17, so that the sensor 17 is activated.

With the above structure, the sensor 17 detects the rotational position and the number of rotations of the sheet conveying roller 7 each time the sheet conveying roller 7 makes one rotation, and transmits the rotation information to a control unit (not shown), and the control unit Is configured to control the rotation of the sheet transporting motor 7 by controlling the rotation of the sheet transporting motor 10.

Therefore, when the sheet 4 is supplied from the sheet supply port 5, the sheet conveying roller 7 is stopped and made to stand by at the position where the sensor lever 14 activates the sensor 17, and the sheet 4 is conveyed to the sheet conveying roller 7 and the pinch roller. 8 and insert it between both rollers.

As a result, the sheet conveying roller 7 holds the sheet 4 at the nip position at which the sheet 4 is conveyed, and the rotation reference of the roller 7 when the sensor 17 detects the rotational position and the rotational speed of the sheet conveying roller 7. By initializing the position and the corresponding position, the initial operation for starting the operation is performed.

With the above structure, when the sheet 4 inserted from the sheet supply port 5 along the sheet guide 2 is guided by the sheet guide 23 and is inserted between the sheet conveying roller 7 and the pinch roller 8, both rollers are introduced. The sheet conveying roller 7 starts to rotate under the control of a controller (not shown). At the same time, the sensor lever 14 that rotates integrally with the sheet conveying roller 7
Is separated from the sensor 17 and the sensor 17 stops its activation, and its detection signal is transmitted to a control unit (not shown).

Further, when the sheet conveying roller 7 rotates a predetermined integer number of times, the sensor lever 14 rotating integrally with the sheet conveying roller 7 contacts the sensor 17 by a number equal to the number of rotations of the sheet conveying roller 7, The sensor 17 is activated and transmits a detection signal to a control unit (not shown).

On the other hand, the sheet 4 is conveyed while being guided by the sheet guide 24, and a predetermined position such as a reading start position or a recording start position on the sheet 4 converts an image mounted on the main body 1 into an electric signal. When it reaches a position facing the reading head 15 for reading, the sheet conveying roller 7 just rotates a predetermined integer number of times, and the sensor lever 14 rotating integrally with the roller 7 comes into contact with the sensor 17 to cause the sensor 17 to move. The distance l between the reading head 15 and the holding position where the sheet conveying roller 7 and the pinch roller 8 hold the sheet 4 is set in advance so as to come to the starting position.

Further, when the sheet conveying roller 7 is further rotated to convey the sheet 4 and the predetermined position on the sheet 4 reaches a position facing the recording head 16, the sheet conveying roller 7 is set to the predetermined position. In order that the sensor lever 14 rotating integrally with the roller 7 comes into a position where it contacts the sensor 17 and activates the sensor 17, the distance L between the reading head 15 and the recording head 16 is set in advance. It is configured by setting.

Assuming that the diameter of the sheet conveying roller 7 is D, the intervals 1 and L are {l = mπD (m is an integer)} and {L = nπD (n is an integer)}. ing.

Therefore, as described above, the sensor lever 14 that rotates integrally with the sheet conveying roller 7 comes into contact with the sensor 17 and activates the sensor 17, so that the rotational position and the number of rotations of the sheet conveying roller 7 are changed. It is possible to detect and detect the signal, and a control unit (not shown) controls the sheet conveying motor 10 to regulate the conveying distance of the sheet 4.

In the control of the transport distance of the sheet 4, the transport distance of the sheet 4 is regulated in the unit of the circumference of the sheet transport roller 7, so that there is eccentricity of the sheet transport roller 7 and eccentricity of the gear 12. Even if it does, the sheet 4 can be conveyed without being affected by these.

Therefore, the sheet 4 can be accurately conveyed without causing an error in the conveying distance due to the eccentricity of the sheet conveying roller 7 or the eccentricity of the gear 12, which has been a problem in the related art, and the sheet is read by the reading head 15. When the recorded image is recorded by the recording head 16 in the same device, it is possible to perform recording without deviation.

FIG. 3 is a side view showing the second embodiment of the input / output device of the present invention. The components having the same effects as those of the first embodiment and having the same effects are designated by the same reference numerals and the description thereof will be omitted. In FIG. 3, the sheet feeding roller 7 and the pinch roller 8 sandwich the sheet 4 and the distance L between the read head 15 and the read head 15 and the distance L between the read head 15 and the recording head 16.
Are set to integral multiples of the circumferential length of the sheet conveying roller 7 serving as the conveying regulation rotating body, as described in the first embodiment.

A sensor lever 14 provided coaxially with the sheet carrying roller 7 and rotating integrally with the sheet carrying roller 7 is a sensor 17 fixed to a predetermined position of the main body 1 as a rotation information detecting means. When the sheet conveying roller 7 is contacted with and the sensor 17 is activated, the rotational position and number of rotations of the sheet conveying roller 7 are detected.

Further, in the vicinity of the sheet supply port 5, a plurality of sheets 4 are inserted on the upstream side of the sheet 4 in the sheet conveying direction from the sandwiching position where the sheet conveying roller 7 and the pinch roller 8 sandwich the sheet 4. When the sheet 4 is rotated, the sheet 4 is rotated in the reverse direction to separate the sheet 4 to prevent double feeding, and a pressing plate 19 that presses the separating roller 18 so as to face the separating roller 18; The plate 19 is provided with an ASF 21 (automatic sheet feeder) including a spring 20 and the like for applying a pressing force.

Therefore, the plurality of sheets 4 stacked on the sheet guide 2 are separated one by one by the ASF 21 and are sequentially supplied from the lowermost portion to the conveying path of the sheets 4 in the main body 1. Further, a registration roller 22 serving as a registration rotating body is provided on the downstream side of the ASF 21 in the conveying direction of the sheet 4, and when the sheet 4 separated by the ASF 21 comes into contact with the registration roller 22, a driving unit (not shown) is provided. Thus, the registration roller 22 is stopped while the registration roller 22 is stopped, or the registration roller 22 is rotated in the reverse direction of the conveyance of the sheet 4 to correct the skew of the sheet 4 and perform registration.

When the registration is performed and the sheet 4 is set at the correct position, the registration roller 22 is rotated in the sheet conveying direction by a driving unit (not shown), and the sheet 4 is moved along the sheet guide 25. The sheet is conveyed and nipped by the sheet conveying roller 7 and the pinch roller 8. Similar effects can be obtained by configuring the other configurations in the same manner as in the first embodiment.

In the above-described embodiment, the sheet conveying roller 7 is stopped at the position where the sensor lever 14 activates the sensor 17 until the sheet 4 reaches the nipping position where the sheet 4 is nipped by the sheet conveying roller 7 and the pinch roller 8. I'm waiting,
In this embodiment, as another embodiment, when the sensor lever 14 rotating integrally with the rotating sheet conveying roller 7 comes to a position to activate the sensor 17, the registration rotating body is rotated. 22 may supply the sheet 4 and sandwich the sheet 4 between the sheet conveying roller 7 and the pinch roller 8.

In the case of the above construction, the sheet 4
When feeding the sheet 4 to the sheet conveying roller 7, it is not necessary to stop the sheet conveying roller 7 and stand by, and even when the roller 7 is rotating, the sheet 4 is held at the predetermined nipping position. After nipping, the sheet conveying roller 7 rotates a predetermined integer number of times to convey the sheet 4, and the sheet 4 can be accurately conveyed to the position facing the read head 15 or the recording head 16, respectively.

Further, in the above-mentioned structure, the sheet 4 is conveyed by the sheet conveying roller 7 and the pinch roller 8, and the reading start position or the recording start position on the sheet 4 is set at a position facing the reading head 15 shown in FIG. The registration rotating body 22 may supply the sheet 4 so that the sensor lever 14 that rotates integrally with the sheet conveying roller 7 is at a position to activate the sensor 17 when the predetermined position is reached. It is possible.

In the case of the above-described structure, the distance l between the reading head 15 and the holding position where the sheet conveying roller 7 and the pinch roller 8 sandwich the sheet 4 is set to the circle of the sheet conveying roller 7 as described above. It is not necessary to make it an integral multiple of the circumference, and even if the interval 1 is set to a desired value, the sheet conveying roller 7 rotates a predetermined integral number of times to convey the sheet 4 and read the recording head 15 or the recording head 16. The sheet 4 can be accurately conveyed to the position facing each of the sheets.

FIG. 4 is a side view of the third embodiment of the input / output device of the present invention. It should be noted that components having the same effects as those of the first embodiment described above and having the same effects are designated by the same reference numerals and the description thereof will be omitted. In FIG. 4, the reading head 15 is installed on the side opposite to the side on which the recording head 16 is installed with a conveyance path along which the sheet 4 is conveyed separated, and is provided so as to face the sheet 4.

With the above structure, when the sheet 4 is a recording sheet, recording is performed by setting the recording surface to face the recording head 16 (upward) and set it on the sheet guide 2. When the sheet 4 is a document to be read, the document surface is read by setting it on the sheet guide 2 with the document surface facing the reading head 15 (downside).

Further, as described in the first embodiment, the pinching position for pinching the sheet 4 by the sheet conveying roller 7 and the pinch roller 8 which are the conveyance regulating rotators, and the reading head 15.
And the distance L between the read head 15 and the recording head 16 are set to integral multiples of the circumferential length of the sheet conveying roller 7.

Further, a sensor lever 14 provided coaxially with the sheet conveying roller 7 and rotating integrally with the sheet conveying roller 7 is fixed to a predetermined position of the main body 1 by a sensor 17 serving as rotation information detecting means. By contacting and activating the sensor 17, the rotational position and the number of rotations of the sheet conveying roller 7 are detected, and the control unit (not shown) controls the sheet conveying motor 10 by the detection signal to regulate the conveying distance of the sheet 4. .

Similar effects can be obtained by constructing the other constructions in the same manner as in the first embodiment, and due to the eccentricity of the sheet conveying roller 7 and the eccentricity of the gear 12 which have been problems in the prior art as in the first embodiment. There is no error in the transport distance.

Further, in the present embodiment, the reading head 15 is installed on the opposite side of the side on which the recording head 16 is installed across the carrying path for carrying the sheet 4 and provided so as to face the sheet 4. Can be downsized. Further, since the recording surface of the recording sheet at the time of recording and the original surface at the time of reading are arranged on the opposite sides, the sheet 4 can be formed even when the reading head 15 is formed by using a contact type reading device such as a contact sensor. In the case of a recording sheet, there is no risk of deterioration of quality such as scratches or scratches due to the contact of the reading head 15 on the recording surface.

In this embodiment, as shown in FIG. 4, the reading head 15 is arranged on the lower side and the recording head 16 is arranged on the upper side with the conveyance path of the sheet 4 being separated.
15 and a similar effect can be obtained by disposing the recording head 16 on the lower side.

Further, in the above-described embodiment, the nipping position at which the sheet conveying roller 7 and the pinch roller 8 nip the sheet 4 and the distance l between the reading head 15 and the reading head 15.
Although the distance L between the recording head 16 and the recording head 16 is set to an integral multiple of the circumferential length of the sheet conveying roller 7 which serves as the conveying regulation rotating body, the sheet conveying roller 7 is improved in accuracy to eliminate a conveying error due to eccentricity or the like. In this case, in addition to the sheet conveying roller 7 as the conveyance regulating rotating body, the rotating bodies such as gears 11, 12, and 13 forming the drive transmission system of the sheet conveying means for conveying the sheet 4 and the driving of the sheet conveying means. It can be configured by applying the drive shaft of the sheet conveying motor that is the source.

In the case of the above configuration, a rotation information detecting means such as a sensor for detecting the rotational position and the number of rotations of the transport regulating rotary body is installed, and an integer of one rotation of the transport regulating rotary body. Sheet transport roller 7 that supports double rotation
The sheet feeding roller 7 and the pinch roller 8 sandwich the sheet 4 at a distance equal to the sheet 4 conveying distance, and the gap 1 between the reading head 15 and the reading head 15 is set. The same effect as described above can be obtained by setting the interval L between the and.

When the sheet conveying motor 10 is a conveying regulation rotating body, the motor is used as rotation information detecting means for detecting the rotational position and the number of revolutions of the motor 10.
The same effect can be obtained by providing the 10 with a rotary encoder or the like. When the rotation information detecting means is constituted by a rotary encoder, a feedback control detector for feeding back the conveying operation of the sheet 4 to improve the conveying accuracy can be constituted by using the rotary encoder. Is.

Further, in the above embodiment, the reading head 15 is provided upstream of the recording head 16 in the conveying direction of the sheet 4, but on the contrary, the recording head 16 is upstream of the reading head 15 in the conveying direction of the sheet 4. Can be installed in the
The reading head 15 and the recording head 16 may be installed on the opposite side and opposite to each other with a conveyance path along which the sheet 4 is conveyed separated.

The recording head 16 described in this embodiment can be constructed by using various recording heads composed of thermal heads, ink jets, wire dots and the like.
The read head 15 may be an optical read head composed of a contact type device or a separated type device.

[0056]

Since the input / output device according to the present invention has the above-described structure and operation, at least one of the rotating bodies of the drive system constituting the sheet conveying means for conveying the sheet is the conveying regulation rotating body. A sandwiching position where the sheet transport rotary body and the pressure contact rotary body sandwich the sheet at a distance equal to the sheet transport distance when the transport regulation rotary body rotates an integral number of times,
The reading head is arranged, and the recording head and the reading head are arranged at a distance equal to the sheet conveying distance when the conveying regulation rotating body is rotated an integral number of times.

Therefore, by defining the sheet transport distance in units of one rotation of the transport regulation rotary body, the transport error due to the eccentricity of the rotating body of the drive system which constitutes the sheet transport means for transporting a sheet as in the conventional case. Does not occur.

Therefore, the sheet is accurately conveyed without being affected by the eccentricity or the like of the conveyance regulation rotating body,
Even when the read image is recorded by the same device, an accurate image can be recorded without causing a deviation. Therefore, particularly when this apparatus is applied as a copying machine, a good image can be recorded.

Further, even when a read original is read by a personal computer, processed such as image processing, and then printed out, an accurate and excellent image can be recorded.

[Brief description of drawings]

FIG. 1 is an external view of an input / output device of the present invention.

FIG. 2 is a side view showing the first embodiment of the input / output device of the present invention.

FIG. 3 is a side view showing the second embodiment of the input / output device of the present invention.

FIG. 4 is a side view showing the third embodiment of the input / output device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Sheet guide, 3 ... Operation panel, 4 ... Sheet, 5 ... Sheet supply port, 6 ... Sheet discharge port, 7 ... Sheet transport roller, 8 ... Pinch roller, 10 ... Sheet transport motor, 11, 12, 13 ... Gear, 14 ... Sensor lever, 15 ... Read head, 16 ... Recording head, 17 ... Sensor, 18 ... Separation roller, 19 ... Press plate, 20 ... Spring, 21 ... ASF, 22 ... Registration roller, 23, 24, 25 ... Sheet guide

Claims (5)

[Claims] 1. An input / output device which conveys a recording sheet to record an image and which conveys an original sheet to read an image, and a recording head which performs recording on the recording sheet and an image on the original sheet. A reading head; a sheet conveying rotating body that nips and conveys a recording sheet or an original sheet; a driving force transmitting unit that includes a plurality of rotating bodies that engages with the sheet conveying rotating body and transmits a driving force; At least one of a rotating body having a motor engaging with the force transmitting means, the rotating body forming a rotor of the motor, the sheet conveying rotating body, and a plurality of rotating bodies forming the driving force transmitting means. One of the rotating bodies is a transport regulating rotary body, and the sheet transporting rotary body transports a recording sheet or a document sheet in response to an integral multiple of one rotation of the transport regulating rotary body. Output device distance apart equal distances, characterized in that a said read head and the recording head. 2. A registration rotator for correcting skew of the recording sheet or the original sheet and for conveying the sheet to the conveyance regulation rotator, wherein the conveyance operation of the registration rotator is performed by the conveyance regulation rotator. The input / output device according to claim 1, which is adapted to rotate. 3. The recording head and the reading head are arranged so as to face each other on opposite sides of a sheet conveying path for conveying a recording sheet or a document sheet. I / O device. 4. A rotation information detecting means for detecting rotation information of the conveyance regulation rotating body is provided.
Alternatively, the input / output device according to claim 2 or claim 3. 5. The input / output device according to claim 4, wherein the rotation information detecting means also serves as a detector for feedback-controlling sheet feeding.