JP2001114446A - Sheet supplying device and image processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet supplying device and an image processing device adding to the characteristics of a drive motor and exhibiting a desired picture quality and a desired high speed at the same time. SOLUTION: A driving force transmitting means transmitting a rotary driving force from a drive motor 20 to a sheet feeding means is provided with a change gear ratio switch means having a driving side gear 21a, a planetary gear 21b and an arm 21c. Normal rotations and reverse rotations of the drive motor 20 move the planetary gear 21b so as to transmit the rotary driving force through transmission paths having different change gear ratios.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a paper feeder and an image processing apparatus for performing processing such as image recording and image reading on a sheet material fed from the paper feeder.

[0002]

2. Description of the Related Art Today, with the development of information processing systems,
Various information processing devices have been developed. Among these devices, many devices that record and read by permeating the sheet material have permeated the user, and information processing devices such as copiers, scanners, and facsimile devices are not only used in offices, but also in ordinary households. It is becoming widely used.

The paper feeding system used in these information processing devices often has an automatic paper feeding means, and the separating means is largely divided into friction separation, reverse retard separation, claw separation and the like.

FIG. 8 shows an example of a document reading apparatus having an automatic sheet feeding means as a conventional example.

An electric board (control board 201, main power supply 20)
2) It comprises a reading unit 203, an operation unit 204 and the like.

A reading unit 203 includes a document tray 205 for setting and stacking the documents 211, an upper document guide 206 for guiding the document conveying path, a lower document guide 207, a document separating unit 208 for sequentially feeding a plurality of documents, a photoelectric converter. A contact sensor 209 using a conversion element, and a reading reference plate 210 serving as a background color of the document (background color) are attached to the upper surface of the contact sensor 209 opposite to the contact sensor 209.

[0007] As a conveyance path of the original 211, first, the original sandwiched between the original separating roller 212 and the preliminary conveying leaf spring 213 is conveyed one by one by a friction piece 214. Then, the original 211 is fed by the feeding roller 215 and the opposing roller 216.
Then, the paper passes between the contact sensor 209 and the reading reference plate 210, and is discharged by the paper discharge roller 217 and the opposing roller 218 in a direction indicated by an arrow in FIG.

The surface of the reading reference plate 210, which is in contact with the reading surface, is made white in accordance with the background color (background color) of the document, or black instead of the background color of the document. There are cases. In this conventional example, it is configured in white.

The contact sensor 209 is held by the main body frame 219, and its own weight of the reading reference plate 210 or the contact sensor 20 by a spring (not shown).
It is urged to the 9 side.

Referring to FIG. 9, a driving system of the prior art will be described.

When the gear 220a of the drive motor 220 is driven to rotate in the direction shown by the arrow, the connecting gear 221 rotates in the direction shown by the arrow, and the separation roller gear 222 rotates in the direction shown by the arrow. At this time, the separation gear 222 and the separation roller 212 are assembled via a shaft 222a and a one-way clutch (not shown), and when the drive is transmitted to the separation gear 222, the separation roller 212 rotates.

Thereafter, the connecting gear 223 is moved to the feeding gear 22.
4 is transmitted. At this time, the feeding gear 224 and the feeding roller 215 are integrally fitted to the shaft 224a.

[0013] Then, from the connecting belt 225 to the paper discharge gear 22
6 is transmitted. At this time, the paper discharge gear 226 and the paper discharge roller 217 are integrally fitted to the shaft 226a.

[0014]

SUMMARY OF THE INVENTION The document reading apparatus is
It is generally called a sheet feed type, and has a configuration in which a document is moved and read.

In the above-described apparatus, the gear ratio from the drive motor to each roller via the connecting gear is always constant.

Further, in the case where the image memory is not large as the apparatus or the amount of data transfer of the interface is not very fast, for a color original or the like having a large amount of image data,
In general, the operation is always stopped in the middle of reading, and intermittent reading for processing a read signal is performed.

For this reason, if the drive is repeated until the stop / read / next line for each line, the document is conveyed intermittently, the vibration of the motor increases, and overshoot and undershoot, which are peculiar to the motor during intermittent drive, are performed. Due to this phenomenon, the paper transport accuracy is significantly reduced.

In the above-mentioned intermittent feeding (reading drive),
It is necessary to synchronize the driving and the reading operation, and an element that determines the reading resolution in the sub-scanning direction depends on the minimum transport amount of the feeding roller.

Recent reading devices include 300 to 6
Although 00 dpi (dot per inch) is common, 1200 dpi and 1200 dpi are used for devices aiming at high image quality due to the potential demands of users, the improvement in the processing speed of PCs of peripheral devices, and the high-speed transfer of interfaces. Currently 480
Devices up to 0 dpi have been used.

Further, as for a recent reading apparatus, the speed of a document manuscript or a simple image containing only text data has been increased.

Therefore, the minimum transport amount of the feed roller is set to 48
When the resolution is set to 00 dpi, the gear ratio from the drive source is constant. Therefore, in the case of high-speed operation, the drive motor is rotated at a high speed in order to actually read at a reduced resolution (normally about 100 dpi to 200 dpi). Must-have.

As a typical driving motor, a low-priced model is mainly a PM type stepping motor, and a high-priced model often uses a hybrid type stepping motor. It is necessary to secure torque etc. in the self-starting area of the motor.

In the hybrid type, since the minimum step angle is small (1.8 ° = 200 steps, etc.) and the rotation frequency can be set high (self-starting: up to 4000 pps = 1-2 phase driving, etc.), high speed and high image quality can be achieved. It is easy to plan. On the other hand, the cost of the motor alone is much higher (approximately 2.5 to 3 times) and the drive current is higher (approximately 3 A) than the PM type, so the load on the power supply increases, and the regulator and switching capacity are increased. Therefore, there is a problem that a heat radiating plate is required and the outer shape is also increased, resulting in an increase in cost.

In the case of the PM type, since the minimum step angle is large (7.5 ° = 48 steps, etc.), in order to set a high resolution, the speed ratio is increased, and the conveyance amount of the feed roller to the sheet material is reduced. There is a need to. However, since the rotation frequency is also low (self-starting: up to 800 pps = 1-2 phase driving, etc.), it is impossible to rotate within the self-starting area due to motor specifications in the case of high-speed conveyance.

For this reason, the PM type has a problem that it is difficult to achieve both high image quality and high speed, which are currently required as a reading device.

In a normal scanner, the resolution is of an inch system. In a facsimile, the resolution is of an mm system. At present, the transmission ratio must be configured in accordance with one of the above-described methods. It is necessary to separately provide a processing circuit for converting the system, which is a factor that leads to an increase in the cost of the apparatus.

Further, if the minimum step of the drive motor is set to the maximum resolution, the conveyance accuracy is reduced due to the motor characteristics at the time of the intermittent feeding when reading the maximum resolution.
Microscopically, a high quality image is read, but a read image is formed in the sheet material conveyance area which is not most stable.

In particular, with the scanner function, an image once read can be magnified many times on a monitor by a PC.
It can also be confirmed in units of one pixel.

In this case, the conveyance accuracy of the sheet material is remarkably reduced, and it is possible to recognize the occurrence of deviation, overlap and the like for each line.

An object of the present invention is to solve the above-mentioned problems of the prior art. It is an object of the present invention to compensate for the characteristics of a driving motor and achieve a high image quality and a high speed. And an image processing apparatus using a paper feeding device.

[0031]

In order to achieve the above object, according to the present invention, there is provided a sheet feeding apparatus provided with a sheet material conveying means to which a rotational driving force from a driving means is transmitted via a driving force transmitting means. In the apparatus, the driving force transmission unit includes a speed ratio switching unit that selects one of at least two or more speed ratios and transmits the rotation driving force from the driving unit to the sheet material conveying unit. It is characterized by.

Further, in a sheet feeding apparatus provided with a sheet material conveying means to which the rotational driving force from the driving means is transmitted via the driving force transmitting means, the driving force transmitting means is provided when the driving means rotates normally. A transmission ratio that changes the transmission path of the driving force at the time of reverse rotation so that the rotational driving force from the driving unit can be selected from at least two transmission ratios and transmitted to the sheet material conveying unit. It is characterized by having switching means.

The gear ratio switching means is supported by a driving gear to which a driving force from the driving means is input, and an arm coaxially supported by the driving gear, and receives a rotational driving force from the driving gear. And 2 depending on the rotation direction of the driving gear.
It is also preferable to provide a planetary gear that moves in a direction, and a plurality of driving force transmission paths each having a gear that engages when the planetary gear moves.

It is also preferable that the transmission ratio of the sheet material per predetermined time is changed by switching the transmission ratio by the transmission ratio switching means.

A feeding member for conveying the sheet material from the sheet material stacking section toward the sheet material conveying means, and other sheet materials except for one sheet on the side of the feeding member when the sheet material is double fed. And a separating member for preventing the sheet material from being conveyed by a frictional force, and a separating and feeding means for separating and feeding the sheet material.

It is also preferable that the driving means is a motor and the sheet material conveying means is a conveying roller.

The image processing apparatus is characterized by comprising recording means for recording on a sheet material conveyed by the sheet material conveying means provided in the above-described sheet feeding device.

The image processing apparatus is characterized in that it comprises an image reading means for reading an image of a sheet material conveyed by the sheet material conveying means provided in the above-mentioned sheet feeding device.

In the image processing apparatus, there are provided recording means for performing recording on a sheet material conveyed by the sheet material conveying means provided in the above-described sheet feeding apparatus, and image reading means for reading an image of the sheet material. It is characterized by the following.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a document reading apparatus according to the present invention will be described below.

(Embodiment 1) FIG. 1 is a sectional view showing the entire structure of a document reading apparatus SC as an image processing apparatus according to a first embodiment of the present invention.

In FIG. 1, a main body chassis 1 of the document reading device SC (described as a device SC), a control board 2 for controlling the device SC, a power supply unit 3 for supplying power to the device, and a device SC , An operation panel control board 5, and a document table 7 on which a document 6 as a sheet material is stacked.

The document 6 is stacked on a document table 7 and a document auxiliary table 8 and guided in the width direction by a width regulating plate 9 for regulating the width direction of the document. A plurality of originals 6 are conveyed to a wedge-shaped place between a friction piece 12 as a separating member and a separating roller 10 by a preliminary conveying plate 11 which urges a separating roller 10 as a feeding member.

The separating roller 10 and the friction piece 12 serve as separating and feeding means, and the separating roller 10 is rotated by a driving motor 20 as a driving means, which will be described later, in the direction of the arrow shown in FIG. The separation roller 10 side 1
Only the sheets are separated and fed.

A feeding roller 13a constituting the sheet material conveying means is driven by a driving motor
The original 6 is rotated by receiving a rotational driving force from 0, and the original 6 is conveyed by obtaining the urging force of the opposing auxiliary roller 13b.

The document transport guide 14 guides the document 6 from the separation roller 10 to a contact sensor 15 described later.

A background color is provided above the contact sensor 15 mounted on the mounting plate 15a.
Further, the reading reference plate 16 serving as a white reference in reading is configured to cover the entire reading width of the contact sensor 15.

A light source (not shown) for irradiating the original 6 (in this embodiment, LE
D). And contact sensor 1
5 is rotated by a drive motor 20, which will be described later, in the direction of the arrow shown in FIG. 5, and the urging force of the opposing auxiliary roller 17b is obtained to move the document 6 in the direction of the arrow A1 outside the apparatus SC. Discharge.

Next, the drive system of the device SC will be described in detail.

FIG. 2 is an explanatory diagram of drive connection when the drive motor 20 (in this embodiment, a PM type stepping motor is used) is rotatingly driven in the illustrated normal rotation direction.

A motor gear 20a is attached to the drive motor 20, and a drive gear 21a is connected to the motor gear 20a.

The driving gear 21a is fixed to the main body chassis 1 so as not to change the relative positional relationship with the motor gear 20a, and the arm 2 is coaxially supported by the driving gear 21a.
The other end of 1c is provided with a planetary gear 21b that receives rotational driving force from the driving gear 21a and moves in two directions according to the rotation direction of the driving gear 21a.

The drive side gear 21a, the planetary gear 21b and the arm 21c constitute a speed ratio switching means (the speed ratio reduces the rotational driving force of the drive motor 20).

As shown in FIG. 2, when the drive motor 20 is driven to rotate in the direction of the arrow shown in FIG.
The driving-side gear 21a and the planetary gear 21b connected to a are rotated in the direction of the arrow shown in the figure, respectively, and the planetary gear 21b is moved in the direction of the arrow A2 shown and connected to the connecting gear 22.

Then, the connection gears 22 and 23 rotate in the direction of the arrow shown in the figure, and the drive is transmitted from the connection gear 23 to the feed gear 24. At this time, the feed gear 24 and the feed roller 13
a is fitted integrally with the shaft 24a.

Then, the driving force is transmitted from the connecting gear 25 to the sheet discharging gear 26. At this time, the discharge gear 26 and the discharge roller 1
7 is integrally fitted to the shaft 26a.

Next, FIG. 3 is an explanatory diagram of drive connection when the drive motor 20 is rotationally driven in the illustrated reverse direction.

First, when the drive motor 20 is driven to rotate in the direction of the arrow shown in the figure, the driving gear 21a and the planetary gear 21b rotate in the direction of the arrow shown in the figure, and the planetary gear 21b moves in the direction of the arrow A3 shown in the figure to connect the gear. 27.

Then, the connecting gears 27, 28 and 23 rotate in the direction of the arrow shown in the figure, and
Drive is transmitted to. Then, the drive is transmitted from the connection gear 25 to the paper discharge gear 26.

In this embodiment, the transmission path of the driving force from the driving motor 20 is defined by the driving gear 21 a and the planetary gear 21.
The transmission path using the connection gears 22 and 23 via the transmission gear b (the state shown in FIG. 2) and the transmission path using the connection gears 27, 28 and 23 via the driving gear 21a and the planetary gear 21b (the state shown in FIG. 3). ) Are provided.

Then, the transmission path in FIG. 2 is set to a high-speed specification and the transmission ratio is set low, and in FIG. 3, the transmission ratio is set to a high-resolution reading specification and the transmission ratio is set high.

In detail, in FIG. 2, the minimum transport amount of the feed roller 13a and the discharge roller 17a is determined by the reading resolution 100d
pi is set to one line (= 0.254 mm), the rotation frequency is rotated at 800 pps by 1-2 phase drive, and the reading conveyance time per A4 sheet is about 1 The high-speed reading specification is less than .5 seconds.

In FIG. 3, the minimum transport amount of the feed roller 13a and the discharge roller 17a is set to one line (= 0.0105 mm) at a reading resolution of 2400 dpi, and a high-resolution (fine) image is read. It supports reading.

As described above, by providing two or more speed ratios, the conveyance amounts of the feed roller 13a and the discharge roller 17a are changed, and high-speed reading and high-resolution reading can be performed with an inexpensive motor which is not different from the conventional one. Two types can be supported, and the image reading quality can be further improved.

Also, without enlarging the outer shape of the device,
It does not increase the cost of the device.

(Embodiment 2) FIG. 4 is a sectional view showing the overall structure of a multifunction peripheral FS as an image processing apparatus having a facsimile function and a scanner function that can be loaded into an external computer according to a second embodiment of the present invention. FIG. 5 is an external perspective view of the apparatus.

As a recording system of the multifunction peripheral FS according to each of the following embodiments, an apparatus generally called an ink jet recording apparatus is employed.

First, the overall configuration of the multifunction peripheral FS will be described with reference to FIGS.

As shown in FIG. 4, this composite device FS
A paper feeding system A for supplying a recording sheet, a recording system B as a recording unit, a reading system C as an image reading unit for reading an image described in a document, and an operation unit D, and a main body upper cover 101, a main body lower cover 102, a control board 102a for controlling the device, and a power supply unit 102b for supplying power to the device.

First, the reading system C will be described. The reading system C irradiates the original 103 with light, converts the reflected light into an electric signal, and transmits this signal to another device or transmits it to its own recording system B according to the operation mode.

More specifically, the document 103 is stacked on the document table 104 and the document auxiliary tray 105, and the document width regulating plates 106a and 106b prevent the document from being skewed in the width direction during conveyance.

The original 103 having a plurality of sheets is
7 is rotated by a drive motor (not shown) in the direction of the arrow shown in the figure, and the preliminary conveyance plate 108 is urged toward the separation roller 107, so that the friction piece 109 and the separation roller 107 are conveyed to a wedge-shaped place.

The plurality of originals 103 are separated one by one by the friction piece 109, and the feed roller 110a is rotated by a driving motor (not shown) in the direction of the arrow shown in the figure to obtain the urging force of the opposing auxiliary roller 110b. Conveyed.

The document conveying guide 111 is provided with the separation roller 10.
The document 103 is guided from 7 to the contact sensor 112.

On the upper part of the contact sensor 112 attached to the contact sensor attachment plate 112a, a reading reference plate 113 which is absolutely white in reading is formed so as to cover the entire reading width of the contact sensor 112. I have. Also, the document 10 is provided inside the contact sensor 112.
3, a light source (not shown) that irradiates LED 3
Use).

The original 103 read by the contact sensor 112 is rotated by a drive motor (not shown) in the direction of the arrow shown in the figure by the discharge roller 114a to obtain the urging force of the auxiliary roller 114b facing the outside. It is discharged in the direction of arrow A4 shown in the figure. Then, the document is stacked on the document discharge tray 115.

The document discharge tray 115 is configured to be movable in the direction of the arrow shown in FIG. 5, and is to be stored inside the apparatus except for the reading operation.

The structure of the drive system connection here is the same as that of the first embodiment.

Next, the operation section D will be described. Operation unit D
Is for performing operations such as a copy operation, a transmission operation, and a scanner operation. The operation cover 116 is provided with keys corresponding to various operations such as a dial key 116a and a display unit 116b. The operation unit D is provided above the document transport mechanism in the reading system C, and is configured to be rotatable in the direction of arrow A5 shown in FIG.

A telephone line-like modular 102c1 for transmitting / receiving data is provided at one end of the operation unit D.

Next, the paper feeding system A will be described. As the recording sheet 120, it is possible to use plain paper, a plastic sheet or the like and other materials that can transfer ink. In the present embodiment, plain paper cut to B4 size or A4 size is
Used as

The recording sheet 120 (hereinafter referred to as recording paper) is supplied to the recording paper tray 121 by a recording paper height regulating plate 101a provided on the back surface of the main body upper cover 101 and can be pulled out in the direction of the arrow. 122 are stored and stacked. Also, the recording paper side guide 12
3 regulates the width of the recording paper 120 in the width direction.

In FIG. 4, a pressure plate 124 formed at the bottom of the recording paper 120 is supported so as to be rotatable about a rotation shaft (not shown), and is controlled by a drive system (not shown) for one rotation. The recording paper 124 is configured to have a spring property so that the recording paper 120 comes into contact with the paper feed roller 125 and is conveyed by 124a.

The recording paper 125 conveyed by rotating the paper feed roller 125 in the direction of the arrow shown in the figure is separated by claw separation and conveyed one by one to the recording system B.

Next, the recording system B will be described.

As a recording system of the composite apparatus FS, an apparatus generally called an ink jet recording apparatus is employed.

In FIG. 4, a recording system B applies a recording paper 120 supplied from a paper feeding system A in response to an image signal transmitted from another apparatus or an image signal transmitted from a reading system C described later. An image is recorded.

The operation will be described in detail.
Is pressed by the LF roller 127 side and also serves as an upper guide of the recording sheet 120 conveyed from the paper feeding system A,
The pinch roller 126a faces the LF roller 127. Then, the recording cartridge 128 and the platen plate 12
9, the recording sheet 120 is conveyed, and the recording cartridge 128 performs a recording operation.

In this embodiment, the recording cartridge 128 is configured to perform serial printing while moving in the width direction of the recording sheet 120 by a motor and a driving system (not shown).

The recording sheet 120 after printing and recording is
The recording sheet 120 is moved by the arrow A6 so that the printing surface is not stained by the spur roller 130b facing the discharge roller 130a.
The sheet is conveyed to the outside of the apparatus, and is stacked on a sheet discharge cover 131 and a sheet discharge auxiliary tray 132 movable in the arrow direction shown in FIG.

In FIG. 6, the document loading table 104 is moved by an arrow A7 by the rotation center (not shown) of the main body upper cover 101.
It is supported rotatably in the direction. The recording cartridge 128 is detachable in the direction of arrow A8.

Next, FIG. 7 is a block diagram showing a control system of the multifunction peripheral according to the present embodiment.

In FIG. 7, a control unit 102a for controlling the multifunction peripheral, a power supply unit 102b for supplying power to the whole multifunction peripheral, and a modem board unit 102a1
And a communication board unit 102c for connecting a telephone, and a display unit 116b for displaying the contents input from the operation unit D and the like.

The control unit 102a includes a CPU 102a2 for controlling the entire apparatus, a ROM 102a3 storing various programs and various data, and the like.
The RAM 102a4 is used as a work area for a2, temporarily stores various data such as the number of recordings, and has a RAM 102a4 for storing and registering various data, and an input / output switching interface 102a8.

Reference numeral 102a5 denotes a line memory for storing the image of each line of the image data. In the case of transmitting or copying a document, one line of image data from the reading system C of the document is stored. In the case of data reception, one line of decoded data is stored.

The image data stored in the line memory 102a5 passes through the CPU 102a2 and adds a recording system control code to the input / output switching interface 102.
a8 to the CPU B1 of the recording system B,
The image recording is performed by the UB 1 decoding the recording system control code.

Also, 102a6 represents the image information to be transmitted as M
This is an encoding / decoding unit that performs more encoding, such as H encoding, or that decrypts received encoded image data and converts it into image data.

Reference numeral 102a7 denotes a buffer memory for storing coded image data transmitted and received. Then, the printer interface 102a9 is sent from the peripheral computer E.
, Image data and text data can be output to the recording system B, and the image data read by the reading system C can be taken into the peripheral computer E.

(Embodiment 3) Next, the above-described composite apparatus F
Another embodiment of each part in S will be described. Further, in the above-described embodiment, the speed ratio switching means is provided in the reading original conveying system. However, it is obvious that the reading original conveying system may be constituted by a recording sheet conveying system of a recording system.

In the above-described embodiment, the gear ratio is switched by the normal rotation and the reverse rotation of the reading motor. However, it is obvious that the gear ratio may be switched by using a clutch or the like.

As switching means using a clutch or the like,
For example, in FIG. 2, the planetary gear 21b does not move and engages with both of the connecting gears 22 and 27.
2, a driving force is transmitted to the connecting gear 23 via a one-way clutch transmitting a driving force during forward rotation, and a connecting gear 28 is transmitted to the connecting gear 27 via a one-way clutch transmitting a driving force during reverse rotation. It may be configured to transmit the driving force to the motor.

Further, in the above-described embodiment, the ink jet recording method is used as the recording means. However, an electrophotographic recording method using a toner (laser beam printer) or a thermal transfer recording method using an ink sheet and a thermal head is used. Of course, it may be configured.

In the above-described embodiment, the contact sensor is used as the reading means. However, it is obvious that the contact sensor may be constituted by a reduction optical system using a light source and a CCD.

In the above-described embodiment, the paper feeding mechanism uses the claw separation system. However, it goes without saying that another separation system such as friction separation or retard separation may be used.

[0105]

According to the present invention described above, the rotational driving force from the driving means is changed by the driving force transmitting means having the speed ratio switching means with respect to the predetermined rotational driving force from the driving means. It is possible to change the transport amount of the sheet material to be transported, and it is possible to cope with a plurality of transport conditions, such as when a high transport speed is required or when low-speed accurate transport is required.

Accordingly, by carrying the sheet material to the image reading means at different carrying amounts (speeds), a sheet material carrying speed suitable for low-speed reading at high speed and high-resolution reading at low speed is obtained. And high quality image reading can be performed.

Further, it is possible to convey the sheet material to the recording means with a different conveyance amount (speed), and convey the sheet material in accordance with the recording speed of the recording means.

By changing the transmission path of the driving force between the forward rotation and the reverse rotation of the driving means, the rotational driving force from the driving means is selected at least one of at least two speed ratios and the seat is selected. The provision of the transmission ratio changing means for transmitting the material to the material conveying means makes it possible to very easily perform the control for changing the conveying speed.

The speed ratio switching means includes a driving gear, an arm, and a planetary gear for selecting any one of a plurality of driving force transmission paths. It is possible to change the force transmission path.

The driving hand throw is a motor, and the sheet material conveying means is a conveying roller, so that the apparatus can be constructed at a small size and at low cost.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the entire structure of an image processing apparatus according to a first embodiment.

FIG. 2 is an explanatory diagram of the drive system according to the first embodiment (at the time of normal rotation).
It is.

FIG. 3 is an explanatory diagram of the drive system according to the first embodiment (at the time of reverse rotation);
It is.

FIG. 4 is an explanatory diagram of the entire structure of an image processing apparatus according to a second embodiment.

FIG. 5 is an explanatory perspective view of an external appearance of an image processing apparatus according to a second embodiment.

FIG. 6 is an explanatory diagram of the entire structure of an image processing apparatus according to a second embodiment.

FIG. 7 is a block diagram illustrating recording control of an image processing apparatus according to a second embodiment.

FIG. 8 is an explanatory diagram of the entire structure of a document reading apparatus according to the related art.

FIG. 9 is an explanatory diagram of a drive system of a conventional document reading apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body chassis 2 Control board 3 Power supply unit 4 Operation panel 5 Operation panel control board 6 Document 7 Document table 8 Document auxiliary table 9 Width control plate 10 Separation roller 11 Preliminary conveyance plate 12 Friction piece 13a Feeding roller 13b Auxiliary roller 14 Document conveyance Guide 15 Contact sensor 15a Sensor mounting plate 16 Reading reference plate 17a Discharge roller 17b Auxiliary roller 20 Drive motor 20a Motor gear 21a Drive side gear 21b Planetary gear 21c Arm 22 Connection gear 23 Connection gear 24 Feed gear 24a Shaft 25 Connection gear 26 Discharge gear 26a Shaft 27 Connecting gear 28 Connecting gear A Paper feeding system B Recording system C Reading system D Operation unit E Peripheral computer 101 Main unit upper cover 102 Main unit lower cover 102a Control unit 102a1 Modem board unit 102a2 CPU 102a3 R0M 02a4 RAM 102a5 Line memory 102a6 Encoding / decoding section 102a7 Buffer memory 102a8 Input / output switching interface 102a9 Printer interface 102b Power supply unit 102c Communication board unit 102c1 Modular 103 Document 104 Document table 105 Document auxiliary tray 106a Document width regulating plate 107 Separation roller 108 Preliminary Transport Plate 109 Friction Piece 110a Feed Roller 110b Auxiliary Roller 111 Document Transport Guide 112 Contact Sensor 113 Reading Reference Plate 114a Discharge Roller 114b Auxiliary Roller 115 Document Discharge Tray 116 Operation Cover 116a Dial Key 116b Display 117a Transport Roller 117b Auxiliary roller 118a Discharge roller 118b Discharge roller 120 Recording sheet 121 Recording paper trayー 122 Recording paper auxiliary tray 123 Recording paper side guide 124 Pressure plate 125 Paper feed roller 126 Recording paper retainer 127 LF roller 128 Recording cartridge 129 Platen plate 130a Paper discharge roller 130b Spur roller 131 Paper discharge cover

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 1/17 H04N 1/12 Z

Claims (9)

[Claims] 1. A sheet feeder comprising a sheet conveying means to which a rotational driving force from a driving means is transmitted via a driving force transmitting means, wherein the driving force transmitting means comprises a rotational driving force from the driving means. And a speed ratio switching means for selecting any one of at least two or more speed ratios and transmitting the selected speed ratio to the sheet material conveying means. 2. A sheet feeding device having a sheet material conveying means to which a rotational driving force from a driving means is transmitted via a driving force transmitting means, wherein the driving force transmitting means is provided when the driving means rotates forward. A transmission ratio that changes the transmission path of the driving force at the time of reverse rotation so that the rotational driving force from the driving unit can be transmitted to the sheet material conveying unit by selecting any one of at least two or more transmission ratios. A sheet feeding device having switching means. 3. The speed change ratio switching means includes: a driving gear to which a driving force from a driving means is input; and an arm coaxially supported by the driving gear, and a rotational driving force from the driving gear. A planetary gear that receives the gear and moves in two directions in accordance with the rotation direction of the driving gear; and a plurality of driving force transmission paths each having a gear that engages when the planetary gear moves. The sheet feeding device according to claim 2, wherein 4. The sheet feeding device according to claim 1, wherein a change in the speed ratio by the speed ratio switching means changes a conveyance amount of the sheet material by the sheet material conveyance means per predetermined time. 5. A feeding member for conveying a sheet material from a sheet material stacking section toward the sheet material conveying means, and when a sheet material is double-fed, another member except one sheet on the side of the feeding member is provided. 5. The feeding device according to claim 1, further comprising: a separating member configured to prevent a sheet material from being conveyed by a frictional force; and a separating / feeding unit configured to separate / feed the sheet material. Paper equipment. 6. The sheet feeding device according to claim 1, wherein the driving unit is a motor, and the sheet material conveying unit is a conveying roller. 7. The image processing apparatus according to claim 1, further comprising a recording unit configured to perform recording on the sheet material conveyed by the sheet material conveying unit provided in the sheet feeding device according to any one of claims 1 to 6. apparatus. 8. An image, comprising: an image reading unit that reads an image of a sheet material conveyed by a sheet material conveying unit provided in the sheet feeding device according to any one of claims 1 to 6. Processing equipment. 9. A recording device for performing recording on a sheet material conveyed by a sheet material conveying device provided in the sheet feeding device according to claim 1, and an image for reading an image of the sheet material. An image processing apparatus comprising a reading unit.