JP2004180147A - Image reading and recording apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve reading accuracy for reading the image of an image sheet while maintaining the image quality of an image recorded on a recording sheet, and to miniaturize an apparatus. <P>SOLUTION: An image reading and recording apparatus 100 is provided with a feeding roller 10, a pinch roller 16, a paper discharge roller 17, and a spur 18 which transfer a document DP on which an image has been recorded and a recording paper P on which an image is recorded in an upstream side and a downstream side; a contact image sensor 22 which reads the image of an original between the feeding roller and the pinch roller and between the paper discharge roller and the spur, and an ink cartridge which records the image on the recording paper; and a pinch roller 441 which is capable of being close to or away from the roller 17 and pressing the document on the roller 17. When the cartridge 1 is recording the image on the recording paper, the contact image sensor can be in a waiting state at a position spaced from the recording paper, and comes close to the document when the original is read to press the pinch roller 441 on the paper discharge roller 17. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is directed to an image reading and recording apparatus including an image reading unit that reads an image on an image sheet and an image recording unit that records an image on a recording sheet, particularly, an image sheet conveying force when conveying an image sheet, The present invention relates to an image recording apparatus in which the recording sheet conveyance force when conveying a recording sheet is made different, the quality of an image recorded on the recording sheet is maintained, and the image reading accuracy is improved.
[0002]
[Prior art]
With reference to FIG. 13, a description will be given of a facsimile apparatus of an ink jet recording system which is an example of a conventional image reading and recording apparatus.
[0003]
The recording paper P, which is a recording sheet, is placed on a recording paper holding member 303 by a user, and separated by a recording paper feed roller 304 and a separation mechanism (not shown) one by one. It is sent into the main body 301A. The recording paper P sent into the apparatus main body 301A is conveyed to the recording unit 306 by the recording paper feeding roller 305, and is recorded outside the apparatus main body 301A by the recording paper discharge roller 307 while an image is recorded by an image recording mechanism such as an inkjet. Is discharged in the direction of arrow B.
[0004]
On the other hand, the document D, which is an image sheet, is placed on the document holding member 308 by the user. The leading end of the document bundle abuts the document separation roller 309 and the separation piece 313, and is formed in a wedge shape by the document separation roller 309 and the separation piece 313. When the document separation roller 309 is rotated by the image reading command, only the documents that come into contact with the document separation roller 309 among the documents received in the wedge shape are separated from other sheets by the friction of the document separation roller 309 and conveyed.
[0005]
The document D separated and conveyed is conveyed while being sandwiched between the document feed roller 310 and the document discharge roller 312 and rollers 314 and 315 opposed thereto, and the image information of the document is read by the contact image sensor 311 and the like. Then, the document is discharged out of the apparatus main body 301A in the direction of arrow A.
[0006]
In order to reduce the size of the facsimile apparatus 301 according to the demands of the market or the like, it is conceivable that the recording paper transport mechanism used for transporting the recording paper P is also used as a document transport mechanism for transporting a document. . That is, the document feed roller 310, the document discharge roller 312, the document drive motor, and the like used for transporting the document are removed.
[0007]
[Problems to be solved by the invention]
As described above, the facsimile apparatus (not shown) having a configuration in which the recording paper transport mechanism and the document transport mechanism are used together can not only be reduced in size, but also can reduce the manufacturing cost. However, there were some problems.
[0008]
That is, the reading conveyance path for reading the document is mainly configured by the contact image sensor 311 for reading the document and the white reference defining member 316 facing the contact image sensor 311 and serving as a reading density reference.
[0009]
However, if the recording transport path for recording an image on a recording sheet and the reading transport path for reading a document are common, the reading transport path is located upstream or downstream of the recording unit 306 on a common transport path that does not interfere with the recording unit area. Roads had to be arranged, and the facsimile machine could not be made very small.
[0010]
If the facsimile apparatus is provided with a reading conveyance path between the recording paper feeding roller 305 and the recording paper discharging roller 307 to make the vicinity of the recording area a common conveyance path, the image of the original is surely reduced. May not be read. This is because, in the conventional facsimile apparatus, the recording paper discharging force of the recording paper discharging roller 307 for discharging the recording paper P is weaker than the original discharging force of the original discharging roller 312 for discharging the original D.
[0011]
Hereinafter, the reason why the recording paper discharge force of the recording paper discharge roller 307 is weaker than the original discharge force of the original discharge roller 312 for discharging the original D will be described.
[0012]
That is, the recording paper may be ejected after the image is recorded by the image recording mechanism of the ink jet and before the ink of the image is fixed. For this reason, in order to discharge the recording paper without soiling the image of the unfixed ink, the recording paper is discharged to a roller that contacts the image recording surface of the recording paper and nips and rotates the recording paper with the recording paper discharge roller 307 to discharge. A spur 317 having a small contact area with the paper is used.
[0013]
Normally, the spur 317 is formed in a star shape by forming a plurality of protrusions on the outer periphery of a thin plastic or metal disk in order to minimize the contact area with the recording paper. However, the pressing force (spur pressure) of the spur 317 against the recording paper discharge roller 307 cannot be made too large in order to prevent the upper surface of the recording paper from being scratched. Therefore, in order to obtain a recording paper discharging force capable of reliably discharging the recording paper, the number of spurs must be increased. However, increasing the number of spurs is structurally and physically limited and increases costs. In other words, the spur pressure and the number of spurs are determined by balancing the impact on the recording paper conveyance force and the print image and the recording paper, and the ejection force of the recording paper is set to a minimum within the range that does not affect the recording paper conveyance. Have been.
[0014]
Therefore, conventionally, when the trailing edge of the recording paper exits the recording paper feed roller 305 and the recording paper is transported only by the recording paper discharge roller 307 and the spur 317, the transport state of the recording paper becomes unstable, The quality of the image recorded in the rear end range of the recording paper may be poor.
[0015]
On the other hand, as the roller 315 pressed by the document discharge roller 312, a plastic pinch roller having a width (length) of several tens mm is used. However, since the document conveyance is made common to the recording paper conveyance, the roller 315 comes into contact with the unfixed ink and disturbs the image. For this reason, since the cylindrical pinch rollers cannot be used, the original is also discharged by the spur 317 in the case of discharging. However, the pressing force of the spur 317 on the recording paper discharge roller 307 is set to be weaker than the pressing force of the roller 315 on the document discharge roller 312 as described above.
[0016]
For the above reasons, the output power of the recording paper is conventionally set to a weak value that does not affect the conveyance of the recording paper, and is therefore lower than the output power of the document. For this reason, the document conveyance accuracy after the trailing edge of the document has passed through the recording paper feeding roller 305 has deteriorated, and the reading accuracy of the trailing edge of the document has deteriorated.
[0017]
SUMMARY OF THE INVENTION An object of the present invention is to provide an image reading and recording apparatus in which the reading accuracy when reading an image on an image sheet is improved while maintaining the quality of an image to be recorded on a recording sheet, and the apparatus is reduced in size. I have.
[0018]
[Means for Solving the Problems]
In order to achieve the above object, an image reading and recording apparatus according to the present invention includes an upstream transport rotating body pair that transports an image sheet on which an image is recorded and a recording sheet on which the image is recorded on an upstream side and a downstream side, and a downstream. Side conveyance rotating body pair, image reading means for reading the image of the image sheet between the upstream conveyance rotating body pair and the downstream conveyance rotating body pair, the upstream conveyance rotating body pair and the downstream conveyance An image recording means for recording an image on the recording sheet between the pair of rotating members, and an image recording means capable of contacting and separating one of the rotating members of the downstream conveying rotating member pair, and pressing the image sheet against one of the rotating members. And a possible auxiliary rotating body, wherein the image reading unit is capable of waiting at a position away from the recording sheet when the image recording unit is recording an image on the recording sheet, and When reading an image sheet And it is adapted to press the auxiliary rotating body to the rotating body of the one close to the seat.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an image reading and recording apparatus according to an embodiment of the present invention will be described with reference to the drawings. The dimensions, materials, shapes, relative arrangements, and the like of the components described in the image reading / recording apparatus of the present embodiment limit the scope of the present invention to only these unless otherwise specified. It is not intended.
[0020]
The image reading and recording apparatus according to the embodiment of the present invention includes a recording sheet P, which is a recording sheet, and a document D, which is an image sheet on which an image is formed, conveyed in a common transport path. A recording unit 29, which is an example of an image recording unit having a recording function of recording an image on a sheet, and a reading unit 28, which is an example of an image reading unit having a reading function of reading an image recorded on a document. It has a recording function of recording an image on P and a reading function of reading an image of the document D.
[0021]
The recording sheet is a sheet on which an image is recorded, and includes, for example, plain paper, thick paper, paper for an overhead projector, and a postcard. The image sheet is a sheet on which an image is recorded, for example, a sheet on which a document, characters, pictures, symbols, and the like are described.
[0022]
(Overall configuration of image reading and recording apparatus)
In FIG. 1, for example, a recording sheet tray 8 serving as a recording sheet stacking means is configured to stack recording sheets P by a user. For example, a document tray 11 serving as an image sheet stacking unit is configured to stack a document D by a user.
[0023]
A separation mechanism is provided near the leading end of each of the trays 8 and 11 in the transport direction. The separating mechanism separates and transports the recording paper P and the document D set on the trays 8 and 11 one by one, and serves to prevent the recording paper P and the document D from being double fed. ing. For example, a recording sheet separating roller 19, which is a recording sheet supply unit, forms a part of a recording sheet separating mechanism. For example, the document separation roller 15 serving as an image sheet supply unit constitutes a part of a document separation mechanism.
[0024]
As shown in FIG. 8, the recording paper separating roller 19 is formed by providing a pair of rollers 19a and 19b separated from a shaft 19c. The document separation roller 15 is formed by providing a roller 15b at the center of a shaft 15a. The pair of rollers 19a and 19b of the recording paper separating roller 19 is located at a position where the roller 15b of the document separating roller 15 is sandwiched from both sides. Due to this positional relationship, as shown in FIG. 11, the first and second rollers 19a and 19b of the recording paper separating roller 19 and the roller 15b of the document separating roller 15 are overlapped. The reading and recording apparatus 100 can be reduced in size. Further, since the roller 15b of the document separating roller 15 is disposed substantially at the center in the document width direction, the skew of the document can be reduced.
[0025]
The printing operation of the image reading and recording apparatus 100 on the recording paper P is performed with reference to the right side surface 35b of the base member 35 in FIG. The first roller 19a is disposed at a position on the right side surface 35b close to the recording reference (about 43 mm from the reference). The second roller 19b is arranged at a position of about 189 mm from the right side 35b to the left side 35b of the recording reference so as to sandwich the roller 15b of the document separation roller 15. For this reason, the image reading and recording apparatus 100 can record an image on recording paper of a wide range of sizes from postcard to A4.
[0026]
The separated recording paper P and original document D are conveyed by, for example, a common feed roller 10 and a discharge roller 17, which are pairs of upstream conveying rotating members. Actually, after the trailing ends of the recording paper P and the document D have passed through the feeding roller 10, as described later, in the case of the recording paper P, the recording paper P is a plurality of paper ejection rollers 17 and a plurality of papers facing the paper ejection rollers 17. Is discharged between the spurs 18 (see FIG. 2).
[0027]
In the case of the document D, the document D is sandwiched and discharged between the discharge roller 17 and the plurality of spurs 18 (see FIG. 7) facing the discharge roller 17 and the plurality of pinch rollers 441. Therefore, there is no need to separately provide a reading drive motor and a document conveying mechanism, and the cost of the image reading and recording apparatus 100 can be reduced. Further, the entire image reading and recording apparatus 100 can be reduced in size. The pinch roller 441 is an example of an auxiliary rotating body.
[0028]
The reading unit 28 shown in FIG. 1 is arranged to face the platen 3 in the movement path of the ink cartridge 1 between the feed roller 10 and the paper discharge roller 17 during a reading operation. The reading unit 28 reads the upper surface (image surface) of the document D being conveyed. As shown in FIG. 2, the reading unit 28 is configured to be able to hold the white reference 25, rotate away from the printing surface, and retreat when recording an image on the recording paper P by the recording unit 29 described below, as shown in FIG. Therefore, there is no contamination by ink mist and ink leakage during the recording operation. When retreating, the reading unit 28 retreats together with the pinch rollers 441, and retreats the pinch rollers 441 from the paper discharge rollers 17. Moreover, since the reading unit 28 is provided at a position where the ink cartridge 1 reciprocates during the reading operation, the size of the image reading and recording can be further reduced.
[0029]
Hereinafter, the configuration and operation of each unit will be described.
[0030]
(Recording unit)
First, as shown in FIGS. 2 to 4, the recording unit 29 records an ink image on recording paper conveyed by the feed roller 10 or the discharge roller 17. The recording unit 29 of the image reading and recording apparatus 100 according to the present embodiment uses an ink jet recording method in which ink is ejected from the ink cartridge 1 to record an image on recording paper. That is, the ink cartridge 1 has a fine liquid discharge port (orifice), a liquid path, an energy action section provided in a part of the liquid path, and an energy for generating droplet forming energy to act on the liquid in the action section. Generating means.
[0031]
The recording unit 29 using the ink jet recording method can be reduced in size and running cost. However, since ink adheres to the periphery of the ink cartridge 1 due to the ink mist generated when the ink is extracted from the liquid ejection port of the ink cartridge 1 and the periphery becomes dirty, when the layout is designed, the periphery is not stained. It needs to be structured.
[0032]
For this reason, as shown in FIG. 2, the contact image sensor 22 retreats to the reading standby position (the first position of the CS holder 26) during the printing operation of the recording unit 29, and separates from the printing surface. I have. Further, the reading surface of the contact image sensor 22 is covered with a white reference 25. With such a structure, dirt on the contact image sensor 22 due to ink mist is greatly reduced. Further, since the reading standby position of the reading unit 28 is separated from the printing surface, even if a recording paper jam or the like occurs in the recording unit 29, the unfixed ink remains on the reading surface of the contact image sensor 22 or the white reference 25. Hardly adheres to
[0033]
(carriage)
As shown in FIGS. 3 and 4, the carriage 4 is mounted with the ink jet cartridge 1 and moves in the width direction of the recording paper P (arrows E and F directions). The carriage 4 is connected to an endless belt-shaped timing belt 6 which is wound around a pulley 5 which is rotated by a carriage drive motor 33 (see FIG. 10). When the pulley 5 rotates, the carriage 4 reciprocates along the guide rail 7.
[0034]
The carriage 4 normally stands by at a standby position (the state shown in FIG. 3) at the right end of the guide rail 7, and is protected by a rubber member (not shown) so that the liquid discharge port of the ink cartridge 1 does not dry. The carriage 4 remains at the standby position even when the reading unit 28 is reading the document D. The replacement of the ink cartridge 1 when the ink in the ink cartridge 1 runs out can be performed by removing the ink cartridge 1 to the near side at the capping position shown in FIG.
[0035]
(Recording paper supply unit)
As shown in FIGS. 2 and 8, the recording paper tray 8 is configured such that a plurality of recording papers P are stacked by a user and the recording papers P are stored. The first and second rollers 19a and 19b of the recording paper separating roller 19 are provided at two places on a shaft 19c (see FIG. 8) of a plastic molded product with a frictional elastic body 19e (see FIG. 8) on a cylindrical portion 19d having a larger diameter than the shaft 19c. 2) is attached. The friction elastic body 19e is made of resin or rubber having elasticity and high friction. Both ends of the shaft 19c of the recording paper separating roller 19 are supported by a base member 35, and one end of the shaft 19c is connected to a drive motor 20 (see FIG. 10) via a drive transmission mechanism (not shown). I have.
[0036]
The pressure plate 9 (see FIG. 2) is located between the recording paper separating roller 19 and the base member 35 and is rotatably supported by the base member 35 by the shaft 12. A cam plate (not shown) integrally formed with the recording paper separating roller 19 presses the outer peripheral surfaces of the first and second rollers 19a and 19b of the recording paper separating roller 19 with the rotation of the recording paper separating roller 19 (in the direction of arrow C in FIG. 2). 9 are configured to contact and separate.
[0037]
The surfaces of the first and second rollers 19a and 19b of the recording paper separation roller 19 are formed of a friction elastic body 19e made of resin or rubber. The cross section of the first and second rollers 19a and 19b is formed in a D-shape. As shown in FIG. 11, the recording paper separating roller 19 stops in a standby state with the D-shaped notch 19f facing the recording paper P, and the gap between the document lower guide member 23 and the recording paper separating roller 19 is stopped. A gap S is formed. Further, the recording paper separating roller 19 enters a notch 50 (see FIG. 8) formed in the document lower guide member 23 described later, protrudes from the lower surface of the document lower guide member 23, and is placed on the pressure plate 9. It comes into contact with the uppermost recording sheet P of the recording sheet bundle.
[0038]
The recording paper P that has come into contact with the rotating recording paper separation roller 19 is stopped by the separation claw 31, but only the uppermost recording paper P of the recording paper P set by friction with the recording paper separation roller 19 is separated. It is transported over 31. The uppermost recording paper P is conveyed by the feed roller 10.
[0039]
After the recording paper separating roller 19 makes one rotation, the notch portion (D cut portion) 19f which has retreated from the circumference again separates from the recording paper P, and the pressure plate 9 is pushed down by a cam (not shown) of the recording paper separating roller 19. Return to the wait state. For this reason, while the feed roller 10 is conveying the preceding recording paper P, the recording paper separation roller 19 does not contact the second and subsequent recording papers P to feed the second recording paper. Therefore, the feeding roller 10 can stably convey the recording paper P.
[0040]
If the recording paper P does not reach the paper edge sensor (PES) 21 (see FIG. 2) even if the recording paper separation roller 19 starts the paper feeding operation as described above, the paper feeding is performed again. Perform the operation. If the PES 21 still does not turn on, the recording paper separating roller 19 stops the operation of transporting the recording paper. Then, an error is displayed on an operation panel (not shown) or the like.
[0041]
(Recording paper transport operation)
Next, the operation of conveying the recording paper will be described. As shown in FIGS. 2 and 8, the sheet transport unit 49 </ b> P during recording includes a platen 3, an auxiliary platen member 3 a, a feed roller 10, four pinch rollers 16, a pinch roller guide 36, The vehicle includes a roller 17, a plurality of spurs 18, a spur holder (not shown), and the like.
[0042]
The feed roller 10 and the pinch roller 16 are an example of an upstream transport rotating body pair. The paper discharge roller 17 and the plurality of spurs 18 are an example of a pair of downstream transport rotating bodies. The discharge roller 17 is an example of one rotating body. The spur 18 is an example of the other rotating body.
[0043]
The platen 3 is provided below the recording paper transport path as a support surface for supporting the lower surface of the recording paper. The auxiliary platen member 3 a is disposed in a concave portion formed on the recording paper supporting surface of the platen 3, and is disposed as a supporting surface that supports the lower surface of the recording paper P subsequent to the platen 3. The feed roller 10 is supported by the platen 3. The four pinch rollers 16 are provided alongside the feed roller 10 along the width direction of the recording paper (the direction intersecting the transport direction of the recording paper). The pinch roller guide 36 supports the pinch roller 16 so as to press the pinch roller 16 against the feed roller 10. The paper discharge roller 17 is a molded product integrally formed of plastic and an elastomer. The plurality of spurs 18 are in contact with the discharge roller 17. The spur holder (not shown) supports the spur 18 so as to press the spur 18 against the paper discharge roller 17.
[0044]
The number of the spurs 18 and the urging force (spur pressure) for urging the spurs 18 against the paper discharge rollers 17 are set to an appropriate number and an appropriate spur pressure so that the unfixed ink of the recorded image is not stained by the spurs 18. Is set to In the image reading and recording apparatus 100 of the present embodiment, eight spurs 18 are arranged in the width direction of the recording paper P as shown in FIG. A plurality of ribs 38 (see FIGS. 5 to 8) are formed on the recording paper supporting surface of the platen 3 in the width direction of the recording paper. The upper surface of the rib 38 allows the recording paper P to pass therethrough.
[0045]
The auxiliary platen member 3a is rotatably supported by a support portion formed on the platen 3 on a shaft formed on both sides of the sheet on the upstream side in the sheet transport direction, and the recording paper supporting surface of the platen 3 and the recording paper support of the auxiliary platen member 3a. The back surface of the auxiliary platen member 3a is urged by a spring 58 so that the surfaces are flush with each other. When the auxiliary platen member 3a is pressed from above against the urging force, it sinks about 5 mm with respect to the recording paper supporting surface of the platen 3. It is designed to fit.
[0046]
The direction of conveyance by the feed roller 10 and the pinch roller 16 is set to have a downward slope obliquely downward from the upstream side to the downstream side of the feed roller 10. The conveying direction of the paper discharge roller 17 and the spur 18 is set to have an upward slope obliquely upward from the upstream side to the downstream side of the paper discharge roller 17. Accordingly, the recording paper P transported by the paper transport unit 49p is guided by the recording paper supporting surface of the platen 3 and the recording paper supporting surface of the auxiliary platen member 3a, and is transported in the direction of arrow K.
[0047]
The recording paper conveyance force F0 generated by the feeding roller 10 and the pinch roller 16 is so large that the frictional resistance between the back surface of the document lower guide member 23 and the recording paper P can be ignored, but the recording paper feeding accuracy is affected. Preferably, a low friction member such as a polymer sheet is attached to the back surface of the document lower guide member 23. The recording operation on the recording paper is performed by ejecting ink from the ink cartridge 1 according to image information while the carriage 4 reciprocates as described above.
[0048]
(Document feeder)
Next, the document feeder 32 will be described with reference to FIGS. 1, 5 to 8, and 10. FIG. The document tray 11 is configured so that a plurality of documents D are stacked and stored by a user. As shown in FIG. 9, the document tray 11 is provided with a document slider 30 for preventing skew of the document. The document slider 30 can move according to the width of the document D.
[0049]
As shown in FIG. 11, the document separation roller 15 rotates in the direction of arrow M to convey the document D set on the document tray 11. The document separation roller 15 is formed by attaching a roller 15b made of a cylindrical friction elastic member to a shaft 19c formed of metal. Both ends of the shaft 19c of the document separating roller 15 are rotatably supported by side plates 35a and 35b of the base member 35. One end of the shaft 19c is connected to the drive motor 20 (FIG. 10) via a read drive transmission mechanism and a drive switching mechanism 52 (not shown) (see FIGS. 5 to 7).
[0050]
The separation piece 13 shown in FIGS. 8 and 11 is held by a separation piece support member 37 rotatably supported by the document lower guide member 23. The separation piece 13 is made of a material having a high coefficient of friction such as rubber, and is urged against the document separation roller 15 by a separation spring (not shown).
[0051]
The document transport assisting member 27 presses the document D against the document separating roller 15 to assist the document separating roller 15 in separating the document. The leading end of the document D set on the document tray 11 remains in the wedge-shaped portion formed by the separation piece 13 and the document separation roller 15, and the topmost document D among the wedge-shaped documents D Only the original is conveyed by friction of the document separating roller 15.
[0052]
The separated document D is conveyed toward the PES 21 (see FIG. 1), like the recording paper P, with the lower surface supported by the document lower guide member 23. At this time, the phase of the recording paper separating roller 19 in the rotation direction is in the initial state. That is, the notch 19 f of the recording / separating roller 19 faces the document, and the gap between the notch 19 f of the recording / separating roller 19 and the document lower guide member 23 allows the document to pass through only one sheet. There is a sufficient gap S.
[0053]
The upper document guide member 14 shown in FIG. 11 is formed in a strip shape. The upstream side of the upper document guide member 14 in the document conveying direction is supported by the shaft 15a of the document separation roller 15, and the lower side of the upper document guide roller 14 separates the recording paper when pressed by the document D. The rotation of the roller 19 is restricted by contacting the shaft 19c of the roller 19. In a state where the upper surface 14a of the upper document guide member 14 is in contact with the shaft 19c, the guide surface 14b of the upper document guide member 14 projects more toward the document than the notch 19f of the recording paper separating roller 19. This prevents the document D from coming into contact with the friction elastic body 19e of the recording paper separating roller 19 and causing a conveyance failure. The document D that has passed through the PES 21 shown in FIG. 1 is nipped and conveyed by the feed roller 10 and the pinch roller 16 like the recording paper P, and reaches the platen 3.
[0054]
(Reading unit)
The reading unit 28 will be described with reference to FIG. The reading unit 28 includes a contact image sensor (hereinafter, referred to as “CS”) 22, a contact image sensor holder (hereinafter, referred to as “CS holder”) 26, a white reference 25, and the like. The CS 22 is housed in a recess formed in the CS holder 26 so that the sensor surface faces outside, and is fixed with screws (fastening members).
[0055]
The white reference 25 is formed by attaching a white sheet to a metal plate. The metal plate includes a flat surface on which a white sheet is mounted and both side plates formed by bending both ends in the longitudinal direction. Holes are formed in both side plates. The shaft formed in the CS holder 26 is engaged with this hole. The white reference 25 is urged toward the CS 22 by a torsion coil spring (not shown) while the hole is engaged with the shaft so that the white reference 25 is rotatably supported by the CS holder 26 and the CS 22.
[0056]
Further, the white reference 25 is biased toward the CS 22 side so that at least one document can pass between the sensor surface of the CS 22 and the white sheet of the white reference 25 in the document width direction. It has a projection on the outside. The white reference 25 forms a gap between the white reference 25 and the sensor surface of the CS 22 by the protrusion. Since the white reference 25 is urged by a torsion coil spring (not shown), the first position (regular position, the state shown in FIGS. 1 and 2) facing the CS 22 and the torsion coil spring are opposed to each other. A second position (cleaning position, a state shown in FIG. 10) rotated in a direction away from the CS 22 is taken. When the white sheet of the white reference 25 or the reading surface of the CS 22 is stained by the ink of the recording unit 29, the white reference 25 is designed so that the user can clean the stained portion at the second position.
[0057]
As shown in FIGS. 5 to 8 and FIG. 12, a hollow boss 421 is formed on the right side surface of the CS holder 26 in the longitudinal direction. A boss 431 is formed on the CS holder supporting member 68 attached to the platen 3. The boss 431 is engaged with the hollow boss 421. Further, a boss 422 is formed on the left side surface of the CS holder 26. The boss 422 is engaged with a bearing 432 formed on the platen 3. Since the left and right engaging portions between the bosses 421, 431, 421 and the bearing portion 432 are located on the same axis, the CS holder 26 is in the first position (reading standby position) of the CS holder 26 shown in FIGS. ) Can be rotated to the second position (reading position) of the CS holder 26 shown in FIG. 1, FIG. 5, and FIG.
[0058]
The first position (reading standby position) of the CS holder 26 is set when the carriage 4 of the recording unit 29 and the ink cartridge 1 attached to the carriage 4 move within the movement range and record an image on recording paper. This is a position where the holder 26 does not contact the carriage 4 and the ink cartridge 1.
[0059]
The second position (reading position) of the CS holder 26 is within the moving space of the carriage 4, and is a document reading conveyance path formed by a gap between the reading surface of the CS 22 and the white reference 25, and paper conveyance during recording. This is a position rotated until it coincides with the recording paper conveyance path formed by the portion 49P.
[0060]
Further, when viewed from the paper discharge direction, the CS holder 26 can be moved to the second position while the ink cartridge 1 is at the capping position (the right end position within the carriage movement range). Is set.
[0061]
The upstream side of the metal plate with respect to the white reference 25 in the paper transport direction is formed in a comb shape. The rib 38 of the platen 3 is inserted between the teeth of the comb teeth. Further, a bent portion for reinforcing the longitudinal direction of the white reference 25 is formed on the downstream side of the metal plate of the white reference 25 in the sheet transport direction. The bent portion pushes down the rotatably supported auxiliary platen member 3a against the urging force of the spring 58 to form the CS holder 26 in the second position. Note that, instead of the bent portion pushing down the auxiliary platen member 3a, the auxiliary platen member 3a may be pushed down by a part of the CS holder 26. Alternatively, a part of the CS 22 may directly contact the auxiliary platen member 3a to push down the auxiliary platen member 3a.
[0062]
A plurality of pinch rollers 441 are disposed on the CS holder 26 downstream of the CS 22 shown in FIG. The pinch roller 441 is formed at the same center position and outer dimensions as the spur 18. As shown in FIG. 7, the pinch rollers 441 are arranged between the spurs 18 in the width direction of the document D. The spur 18 and the pinch rollers 441 according to the present embodiment discharge the document D with seven spurs 18 and three pinch rollers 441.
[0063]
As shown in FIG. 12, the paper transport unit 49r at the time of reading the document has a document reading transport path substantially equal to the recording paper transport path between the feed roller 10 and the paper discharge roller 17 as indicated by a two-dot chain line. It is formed when it is located at the coincident position, and substantially coincides with the sheet transport unit 49P at the time of recording. After the trailing end of the document D has passed through the feed roller 10, the conveyance force of the document D by the discharge roller 17 is increased by the spur 18 urged by the spring 442 and the pinch rollers 441. The document conveyance accuracy is more stable.
[0064]
As shown in FIGS. 5 to 7 and FIG. 10, on the left side of the CS holder 26 in the paper width direction, a drive switching mechanism 52 and a contact image sensor drive transmission mechanism (hereinafter, referred to as “CS drive transmission mechanism”) 73. A contact image sensor driving unit (hereinafter, referred to as a “CS driving unit”) 74 connected to the driving motor 20 via the driving unit 20 is disposed. The drive motor 20 operates the CS drive transmission mechanism 73 to rotate the CS holder 26 to the first position of the CS holder 26 or the second position of the CS holder 26.
[0065]
Next, the reading operation of the reading unit 28 will be described. As shown in FIG. 2, the CS holder 26 is held at a first position (reading standby position) of the CS holder 26 in a standby state of the image reading and recording apparatus, so that a torsion coil spring (elastic member) (not shown) is used. Is biased in a counterclockwise direction. When the reading operation of the document is started in a state where the document D is set, first, the drive of the drive motor 20 is switched to the reading mode by the drive switching mechanism 52 shown in FIGS.
[0066]
The drive motor 20 rotates the document separation roller 15 via the CS drive transmission mechanism 73 as described above to start the document feeding operation, and operates the CS drive unit 74 via the CS drive transmission mechanism 73. The movement of the CS holder 26 is started.
[0067]
The CS holder 26 adjusts the gear ratio of the CS drive transmission mechanism 73 and the CS drive unit 74 and the roller diameter, and moves to the second position (reading position) before the document D reaches the feeding roller 10. It has become. When the CS holder 26 moves to the second position, the clutch connecting the CS drive unit 74 and the CS drive transmission mechanism 73 is disengaged, and the CS holder 26 stops. At the same time, a part of the white reference 25 pushes down the auxiliary platen member 3 a to form a document reading and conveying path between the feed roller 10 and the discharge roller 17. Further, the pinch rollers 441 move between the spurs 18 in the document width direction, and the discharge rollers 17 are urged by the springs 442, so that the document is discharged by the pinch rollers 441 and the spurs 18 and the discharge rollers 17. The discharge force can be made stronger than the discharge force for discharging the recording paper by the spur 18 and the discharge roller 17.
[0068]
The document D that has reached the feed roller 10 is conveyed by the feed roller 10, passes through the document reading conveyance path, is read image data by the CS 22, and is discharged out of the apparatus by the discharge roller 17. When the last end of the document D is read and discharged out of the apparatus by the discharge roller 17, the drive motor 20 rotates in the reverse direction. Then, the CS drive unit 74 and the CS drive transmission mechanism 73 are connected by the clutch, the CS holder 26 moves to the first position, and the reading drive switching mechanism 52 is released. At the same time, the auxiliary platen member 3a is pushed up by the urging force of the spring 58, so that the recording paper supporting surface of the auxiliary platen member 3a and the recording paper supporting surface of the platen 3 are flush with each other, and the paper transport unit 49P during recording is formed. Thus, a recording paper transport path is formed. Further, since the pinch rollers 441 are retracted together with the CS holder 26, they do not interfere with the upper surface of the recording paper when the recording paper is transported, and do not affect the recorded image on the recording paper.
[0069]
In the image reading and recording apparatus according to the present embodiment, the pinch rollers 441 are provided on the CS holder 26. However, as another embodiment, the pinch rollers 441 are provided on the spur holder that supports the spur 18 and the pinch rollers 441 are used. The shaft of the roller 441 is urged in the direction of retreating from the conveyance path, and is retreated to a position where it does not interfere with the recording paper at the time of recording. Then, the pinch roller 441 may be urged against the paper discharge roller 17. Also in this case, the discharging force of the document can be increased only at the time of reading.
[0070]
Note that the recording paper tray 8, the document tray 11, the document separation roller 15, and the recording paper separation roller 19 are not necessarily required. The recording paper and the document may be manually supplied between the feed roller 10 and the pinch roller 16.
[0071]
Hereinafter, embodiments of the present invention will be listed.
[0072]
[Embodiment 1] An upstream transport rotator pair and a downstream transport rotator pair that transport an image sheet on which an image is recorded and a recording sheet on which the image is to be recorded upstream and downstream, and the upstream transport Image reading means for reading an image of the image sheet between a rotating body pair and the downstream transport rotating body pair; and the recording sheet between the upstream transport rotating body pair and the downstream transport rotating body pair. Image recording means for recording an image, and an auxiliary rotator capable of coming into contact with and separating from one of the rotators of the downstream transport rotator pair and pressing the image sheet against one of the rotators, When the image recording unit is recording an image on the recording sheet, the image reading unit can wait at a position distant from the recording sheet, and when reading the image sheet, approaches the image sheet. The auxiliary rotating body An image reading and recording apparatus, wherein the image sheet is read by being pressed against one of the rotating bodies.
[0073]
The image reading and recording apparatus according to the first embodiment is configured such that, when the image sheet is nipped and rotated and transported by the downstream transport rotating body pair, the image sheet is rotated by one of the rotating body and the auxiliary rotating body of the downstream transport rotating body pair. However, since the sheet is nipped, rotated, and conveyed, the conveying force of the image sheet can be increased as compared with the case where the recording sheet is conveyed only by the pair of downstream conveying rotating members. Thus, the image sheet can be transported in a stable state, and the image reading unit can surely read the image on the image sheet, maintain the quality of the image recorded on the recording sheet, and maintain the image quality. Reading accuracy can be improved.
[0074]
Further, the reading conveyance path can be shared with the recording conveyance path, and the conveyance accuracy of the document can be improved.
[0075]
[Second Embodiment] The image reading and recording apparatus according to the first embodiment, wherein one of the rotary members of the downstream transport rotary member pair and the auxiliary rotary member are arranged on the same rotation axis.
[0076]
In the image reading and recording apparatus according to the second embodiment, since one of the rotary members and the auxiliary rotary member of the downstream transport rotary member pair are arranged on the same rotation axis, one of the rotary members and the auxiliary rotary member is one. Since the other rotating body is brought into contact with the other rotating body in the same state as the one rotating body, it is possible to smoothly discharge the image sheet without winding the image sheet around the other rotating body. If one rotator and the auxiliary rotator are not arranged on the same rotation axis, the position of one rotator and the auxiliary rotator is shifted in the rotation direction with respect to the other rotator, The image sheet is wound around the other rotating body, and the image sheet cannot be transported smoothly.
[0077]
[Embodiment 3] The image reading and recording apparatus according to Embodiment 1 or 2, wherein one of the rotating bodies of the pair of downstream transport rotating bodies is a spur, and the auxiliary rotating body is a roller.
[0078]
Since the image reading and recording apparatus of the third embodiment does not use the auxiliary rotating body when transporting the recording sheet, one of the rotating bodies is transported by the downstream transport rotating body pair which is a spur. Damage to the image formed on the sheet is reduced. Further, since the auxiliary rotating body is a roller, the conveying force of the image sheet can be reliably increased.
[0079]
[Embodiment 4] The auxiliary rotating body is provided in the image reading means, and is pressed against the one rotating body by the image reading means when the image reading means approaches the image. The image reading and recording apparatus according to any one of the first to third embodiments.
[0080]
In the image reading and recording apparatus according to the fourth embodiment, since the auxiliary rotating body is provided in the image reading means, when the image reading means approaches the image sheet to read the image on the image sheet, the auxiliary rotating body naturally moves downstream. By bringing the image sheet into contact with one of the rotating body pairs, the conveying force when conveying the image sheet can be reliably increased.
[0081]
[Embodiment 5] The auxiliary rotating body is provided on a fixed member, and is pressed against the one rotating body by the image reading means when the image reading means approaches the image. The image reading and recording apparatus according to any one of aspects 1 to 3.
[0082]
In the image reading and recording apparatus according to the fifth embodiment, the auxiliary rotating body is not provided on the image reading means but is provided on the fixed member. Therefore, the weight of the image reading means can be reduced. The operation of approaching and separating the image reading means can be performed smoothly. Further, when reading the image of the image sheet by bringing the image reading unit close to the image sheet, the image reading unit presses the auxiliary rotating body against one of the pair of downstream-side rotating bodies to transport the image sheet. Power can be reliably increased.
[0083]
[Sixth Embodiment] The first and fourth embodiments are characterized in that the position where the image reading unit reads the image sheet is substantially the same as the position where the image recording unit records an image on the recording sheet. 6. The image reading and recording apparatus according to any one of claims 1 to 5,
[0084]
In the image reading and recording apparatus according to the sixth embodiment, the position at which the image reading unit reads the image sheet is substantially the same as the position at which the image recording unit records the image on the recording sheet. it can.
[0085]
[Seventh Embodiment] An image sheet stacking unit on which the image sheet is stacked, an image sheet supply unit for supplying the image sheet stacked on the image sheet stacking unit, and a recording sheet on which the recording sheet is stacked The image according to any one of embodiments 1 to 6, further comprising a stacking unit, and a recording sheet supply unit configured to supply the recording sheet stacked on the recording sheet stacking unit. Reading and recording device.
[0086]
[Eighth Embodiment] The image reading and recording apparatus according to the first or sixth embodiment, wherein the image recording unit is an ink jet system that records an image by discharging ink onto the recording sheet.
[0087]
In the image reading and recording apparatus of the eighth embodiment, since the image recording means is of the ink jet type, the size of the image recording means can be reduced, and the running cost can be reduced.
[0088]
[Embodiment 9] The image recording unit is a serial type recording system for recording an image on the recording sheet by reciprocating in a direction orthogonal to a conveying direction of the recording sheet. An image reading and recording apparatus according to any one of the first, sixth, and eighth embodiments.
[0089]
In the image reading and recording apparatus according to the ninth embodiment, since the image recording means is of a serial type recording method, the apparatus can be further reduced in size.
[0090]
【The invention's effect】
The image reading and recording apparatus of the present invention can share the reading and conveying path with the recording and conveying path, and can improve the conveying accuracy of the document.
[0091]
Further, when the image sheet is nipped and rotated and conveyed by the pair of downstream conveying rotating members, the image sheet is nipped and rotated by one of the rotating member and the auxiliary rotating member of the downstream conveying rotating member pair and conveyed. Therefore, compared with the case where the recording sheet is conveyed only by the pair of downstream conveying rotating members, the conveying force of the image sheet can be increased, and the image sheet can be conveyed in a stable state. Thus, the image reading unit can reliably read the image on the image sheet, thereby maintaining the quality of the image recorded on the recording sheet and improving the image reading accuracy.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an image reading and recording apparatus according to an embodiment of the present invention, which is cut along a conveying direction of a recording sheet and a document.
FIG. 2 is a diagram illustrating a state where an image is recorded on a recording sheet in the image reading and recording apparatus of FIG. 1;
FIG. 3 is a perspective view showing a position of a reading unit when an image is recorded on recording paper in the image reading and recording apparatus of FIG. 1;
FIG. 4 is a perspective view showing a position of a reading unit and a flow of recording paper when an image is recorded on recording paper in the image reading and recording apparatus of FIG. 1;
FIG. 5 is a perspective view showing a position of a reading unit and a flow of a document when an image is recorded on a recording sheet in the image reading and recording apparatus of FIG. 1;
FIG. 6 is a plan view showing a position of a spur related to ejection of a recording sheet when an image is recorded in the image reading and recording apparatus of FIG. 1;
FIG. 7 is a plan view showing spurs and pinch roller positions related to ejection of a document when an image is read in the image reading / recording apparatus of FIG. 1;
8 is a perspective view showing a configuration relating to a paper feeding system for recording paper and a document in the image reading and recording apparatus of FIG. 1;
FIG. 9 is a perspective view showing a document holding unit in the image reading and recording apparatus of FIG. 1;
10 is a perspective view showing an arrangement of motors and a white reference in a separated state in the image reading and recording apparatus of FIG. 1;
11 is a cross-sectional view of the image reading and recording apparatus of FIG. 1, illustrating a configuration of a portion where a document and a recording sheet in a state where documents are stacked are separated and supplied;
12 is a cross-sectional view illustrating a conveyance path of a document passing through a reading unit in the image reading and recording apparatus of FIG.
FIG. 13 is a cross-sectional view of the image reading and recording apparatus of the conventional image reading and recording apparatus, which is cut along a recording paper and a document conveying direction.
[Explanation of symbols]
P Recording paper (recorded sheet)
D Manuscript (image sheet)
S gap
1 Ink cartridge
3 Platen
3a Auxiliary platen member
4 carriage
8. Recording paper tray (recording sheet stacking means)
9 pressure plate
10 Feeding roller (upstream conveying rotating body pair)
11 Document tray (image sheet stacking means)
14 Original Guide Member
15 Document separation roller (image sheet supply means)
16 Pinch roller (upstream transport rotating body pair)
17 Discharge rollers (downstream transport rotator pair, one rotator)
18 spurs (downstream transport rotator pair, other rotator)
19 Recording paper separation roller (recording sheet supply means)
28 Reading unit (image reading means)
29 Recording unit (image recording means)
32 Document feeder
49p Paper transport unit during recording
49r Paper transport unit for reading
100 Image reading and recording device
441 Pinch roller (auxiliary rotating body)
442 spring

Claims (1)

An upstream transport rotator pair and a downstream transport rotator pair that transport the image sheet on which the image is recorded and the recording sheet on which the image is recorded on the upstream side and the downstream side,
Image reading means for reading the image of the image sheet between the upstream transport rotator pair and the downstream transport rotator pair,
Image recording means for recording an image on the recording sheet between the upstream transport rotator pair and the downstream transport rotator pair,
An auxiliary rotator that can be brought into contact with and separated from one of the rotators of the downstream-side transport rotator pair, and that can press the image sheet against one of the rotators,
When the image recording unit is recording an image on the recording sheet, the image reading unit can wait at a position distant from the recording sheet, and approach the image sheet when reading the image sheet. An image reading and recording apparatus for reading the image sheet by pressing the auxiliary rotating body against the one rotating body.

Images