JP2004180146A - Image reading and recording apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reading and recording apparatus in which the apparatus can be miniaturized, a cost is low, and assembly performance is excellent. <P>SOLUTION: A hinge is provided between a common transfer path 49 of a document transfer path R2 and a sheet transfer path R1, and a holding member 26 for holding an image reading means 22, and the hinge holds the member 26 so that the means 22 can be retracted from the path 49. When the image of the original is read, a positioning means having three protrusions provided on the member 26 and engaging portions provided on the path 49 and engaging with the three protrusions performs positioning for the passage 49 of the means 22. The hinge is constituted so that the protrusions of the member 26 can have postures at which the three protrusions of the member 26 engage the engaging portions respectively, when the means 22 moves to a position where the image of the original can be read. Thus, the means 22 can be easily positioned. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image reading and recording apparatus integrally provided with an image reading unit that reads an image of a document and an image recording unit that records an image on a sheet, a document conveying path that conveys the document to the image reading unit, and a sheet. And a part of a sheet conveying path for conveying the sheet to the image recording unit is formed by a common conveying path.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is an image reading and recording apparatus integrally provided with an image reading section for reading an image of a document and an image recording section for recording (forming) an image on a sheet serving as a recording medium. For example, there is a facsimile machine.
[0003]
FIG. 14 is a diagram showing a schematic configuration of a facsimile apparatus which records an image on a sheet by an ink jet recording method which is an example of such a conventional facsimile apparatus. In this facsimile apparatus, a recording paper which is a sheet is used. When an image is recorded on the recording paper 301, first, the recording paper 301 placed on the recording paper holding member 303 is separated and sent out one by one by a recording paper feeding roller 304 and a separation mechanism (not shown). The sheet is conveyed to an image recording unit 306 by a roller 305.
[0004]
Next, in the image recording unit 306, an image is recorded on recording paper by discharging ink while moving an ink cartridge, which is an image recording unit (not shown), in the scanning direction. After the image is thus recorded, the recording paper 301 is discharged out of the apparatus by a discharge roller 307 as indicated by an arrow B.
[0005]
On the other hand, when reading the image of the original 302, the original 302 is first set on the original holding member 308 in such a manner that the original 302 is abutted in a wedge shape composed of the original separating roller 309 and the separating piece 313. Next, in this state, of the originals 302 held in a wedge shape, only the originals in contact with the original separation roller 309 are separated and conveyed by friction by the original separation roller 309 rotated based on the image reading command.
[0006]
Next, while the document 302 thus separated and conveyed is sandwiched between a document feed roller 310, a paper discharge roller 312, and an opposing roller 312a, a contact image sensor 311 serving as a reading unit provided in an image reading unit. The image information is read by passing through the upper side. Then, after the image information is read by the contact image sensor 311 as described above, the document 302 is discharged out of the apparatus as indicated by an arrow A.
[0007]
By the way, in the facsimile apparatus having such a configuration, in order to meet the market demand for miniaturization, for example, a part of the recording paper transport path and the document transport path are shared, and the transport mechanism used for transporting the recording paper is moved to the original. It is conceivable to use it as a transport mechanism. With this configuration, the original feeding roller 310, the paper discharging roller 312, the driving motor, and the like used for the original conveyance can be eliminated.
[0008]
[Problems to be solved by the invention]
However, the facsimile apparatus (image reading and recording apparatus) in which the transport mechanism is shared as described above can not only reduce the size but also reduce the manufacturing cost, but has the following problems.
[0009]
For example, when an image is read, the reading conveyance path R3 through which the document 302 passes is formed by a contact image sensor 311 that reads the document 302 and a white reference member 311a that is provided opposite to the contact image sensor 311 and that serves as a reading density reference. It is configured.
[0010]
On the other hand, when recording an image, the recording transport path R4 through which the recording paper 301 passes requires a space for moving the ink cartridge in the scanning direction. It is necessary to configure the ink cartridge so as not to contact the contact image sensor 311 or the like.
[0011]
For this reason, in a common transport path that shares a part of the recording paper transport path and the document transport path, it is necessary to arrange the reading transport path R3 upstream or downstream of the recording transport path R4. When the transport path R3 is arranged, the size of the apparatus is insufficiently reduced.
[0012]
In order to reduce the size of the apparatus, for example, when the reading conveyance path R3 is arranged near the recording conveyance path R4 provided between the recording paper feeding roller 305 and the discharging roller 307, the read image quality is reduced. In order to maintain the position, it is necessary to increase the position accuracy of the contact image sensor 311. However, in order to increase the positional accuracy of the contact image sensor 311 as described above, it is necessary to increase the component accuracy, which raises a problem that the component cost increases and the assemblability also becomes complicated.
[0013]
SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to provide an image reading / recording apparatus which can be reduced in size, is low in cost, and has good assemblability.
[0014]
[Means for Solving the Problems]
According to the present invention, an image reading unit that reads an image of a document, an image recording unit that records an image on a sheet, a document conveyance path that conveys the document to the image reading unit, and a sheet that conveys the sheet to the image recording unit An image reading apparatus that includes a sheet conveyance path, and a common conveyance path that forms a part of the document conveyance path and a part of the sheet conveyance path, and reads an original image and records an image on the sheet in the common conveyance path. A recording device, provided in the common transport path so as to be retractable, an image reading unit of the image reading unit that reads an image of the document, a holding member that holds the image reading unit, the holding member, A hinge portion that is provided between a common conveyance path and holds the holding member so that the image reading unit can be retracted from the common conveyance path; and a hinge section that is provided on one of the holding member and the common conveyance path. And at least three projecting portions provided on the other side of the holding member and the common transport path, and engaging portions respectively engaging with the at least three projecting portions. Positioning means for positioning the image reading means with respect to the common transport path, wherein when the image reading means moves the image reading means to a position where the document image can be read, the holding member is The at least three protrusions may be configured to be in a posture of engaging with the engagement portions.
[0015]
Further, according to the present invention, when the image reading unit reads the document image by the positioning unit, the image forming unit forms a reading conveyance path through which the document passes in the common conveyance path and is located at a position where the document image can be read. It is characterized by being positioned.
[0016]
Further, the present invention is characterized in that the image reading means performs positioning in the transport direction of the common transport path by the positioning means.
[0017]
Further, the present invention is characterized in that the image reading means performs positioning in a width direction orthogonal to a conveying direction of the common conveying path by the positioning means.
[0018]
Further, the present invention is characterized in that the image reading means performs positioning in the transport direction of the common transport path and positioning in the width direction orthogonal to the transport direction of the common transport path by the positioning means. It is.
[0019]
The present invention also provides a common feeding unit for feeding the sheet to the image recording unit or the document to the image reading unit on the common conveyance path, and a common feeding unit for discharging the document or sheet. And a paper discharging means.
[0020]
Further, the present invention further includes a support member provided on the common transport path and supporting a sheet passing through the image recording unit when an image is recorded on the sheet, wherein the support member includes the protrusion, Is characterized in that an engaging portion is provided.
[0021]
Further, in the invention, it is preferable that the image recording unit includes an inkjet image recording unit that records an image on the sheet by moving in a direction perpendicular to a sheet conveying direction while discharging ink. Is what you do.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0023]
However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto unless otherwise specified. Absent.
[0024]
FIG. 1 is a cross-sectional view showing a configuration of a facsimile apparatus which is an example of the image reading and recording apparatus according to the first embodiment of the present invention.
[0025]
In FIG. 1, reference numeral 100 denotes a facsimile apparatus. The facsimile apparatus 100 includes an image recording unit 101 having an image recording unit 1A for recording an image on a recording sheet 2 and an image reading unit 28 for reading an image on the document 12. Provided on the image reading device unit 102, a recording paper transport path R1 through which the recording paper 2 passes, a document transport path R2 through which the document 12 passes, and a downstream side in the transport direction of the recording paper transport path R1 and the document transport path R2. And a common transport path 49. The common transport path (hereinafter, referred to as a common transport path) 49 includes a feed roller 10 as a common feed unit for transporting the original 12 and the recording paper 2 and a discharge roller 17 as a common discharge unit. Are arranged.
[0026]
Next, the configuration of the image recording device unit 101 will be described.
[0027]
The image recording device section 101 includes an image recording section 1A described later, a recording sheet feed tray 8 capable of stacking and storing a plurality of recording sheets 2, a recording sheet having a D-shaped cross section, and rotating in the direction of arrow A. The separation plate 19 includes a pressure plate 9 positioned between the recording paper separation roller 19 and the base member 35 and rotatably supported by the base member 35, a separation claw 31, and the like.
[0028]
Here, the pressure plate 9 is rotated vertically by a cam (not shown) integrally formed with the recording paper separating roller 19 around the shaft 9 a as a fulcrum with the rotation of the recording paper separating roller 19 to record the recording paper 2. The paper separating roller 19 is configured to be in contact with or separated from the outer peripheral surface thereof.
[0029]
The separation claw 31 dams the recording paper 2 stacked on the recording paper feeding tray 8. When the recording paper separating roller 19 rotates, the uppermost recording paper 2a in contact with the recording paper separating roller 19 is transported over the separation claw 31 due to friction between the recording paper separating roller 19 and the recording paper separating roller 19. .
[0030]
The recording paper separating roller 19 is formed by attaching a frictional elastic body, for example, rubber, to a cylindrical portion having a diameter larger than two shafts on a shaft member formed of plastic, as shown in FIG. Both ends of the shaft member 19c are pivotally supported by both side portions 35a and 35b of the base member 35, and one end thereof is connected to the drive motor 20 shown in FIG.
[0031]
When the recording paper separating roller 19 is in a standby state, the D-shaped notch 19A stops so as to face the recording paper 2 as shown in FIG. A gap G for allowing the original 12 to pass therethrough is formed between the original and the lower original guide member 23 to be guided. When the recording paper 2 is conveyed, the recording paper 2 is rotated so that the circumferential portion 19B projects beyond the notch 50 (see FIG. 2) formed in the original lower guide member 23 and below the original lower guide member 23, and the pressure plate 9 is in contact with the uppermost recording paper 2a of the recording paper bundle placed on the recording paper bundle 9.
[0032]
Further, after the recording paper separating roller 19 makes one rotation, the notch 19A again faces the recording paper 2 and returns to the standby state in which the pressure plate 9 is pushed down by the cam. Thus, while the feed roller 10 is transporting the uppermost recording paper 2a, the second and subsequent recording papers 2 do not come into contact with the recording paper separating roller 19, and the recording paper 2 can be transported stably. It becomes possible.
[0033]
A PES (Paper Edge Sensor) 21 for detecting the conveyance of the recording paper 2 (or the document 12) is provided downstream of the recording paper separating roller 19 as shown in FIG. If the PES 21 does not detect the passage of the recording sheet 2 (or the document 12) even after the start, the sheet re-feeding operation is performed. If the PES 21 still does not detect the passage of the recording sheet 2 (or the document 12), the conveyance is performed. The operation stops with an error, and an error display is displayed on an operation panel or the like (not shown).
[0034]
On the other hand, a common conveyance path 49 provided on the downstream side in the conveyance direction of the recording conveyance path R1 through which the recording paper 2 sent out by the recording paper separation roller 19 passes, as shown in FIG. The platen 3 includes a platen 3 that functions as a support surface, and an auxiliary platen member 3 a that is provided downstream of the platen 3 and functions as a lower support surface of the recording paper 2 following the platen 3.
[0035]
Here, a plurality of ribs 38 are formed in the recording paper width direction on the recording paper supporting surface of the platen 3 as shown in FIG. The paper 2 passes through.
[0036]
In addition, an auxiliary platen member 3a, which is a predetermined support member that constitutes a support portion that supports the recording paper 2 together with the platen 3, which is a support member, is disposed in a concave portion (not shown) formed on the recording paper support surface of the platen 3, While being held by the platen 3 via a shaft 3a1 shown in FIG. 5 formed on both sides on the upstream side in the recording paper conveyance direction so as to be rotatable in the vertical direction, it is usually elastically urged by, for example, a spring 58. The recording paper supporting surface on the upper surface is held at a position that is flush with the recording paper supporting surface formed by the upper surface of the platen 3.
[0037]
When the auxiliary platen member 3a is pushed from above by the CS holder 26 or the like beyond the urging force of the spring 58 as described later, the auxiliary platen member 3a sinks about 5 mm with respect to the recording paper supporting surface of the platen 3. It is designed to rotate.
[0038]
Further, as shown in FIGS. 1 and 2, the common transport path 49 includes a feed roller 10 supported by the platen 3 and a discharge roller 17 integrally molded of plastic and elastomer. 10, four pinch rollers 16 provided side by side in the recording paper width direction, a pinch roller guide 36 that supports the pinch roller 16 so as to press the pinch roller 16 against the feed roller 10, and a discharge roller 17. And a spur holder (not shown) that pivotally supports the spur 18 so as to press the spur 18 against the discharge roller 17.
[0039]
Here, the conveying direction of the recording paper 2 by the feeding roller 10 and the pinch roller 16 is set so as to be obliquely downward from the upstream side of the roller to the downstream side. The transport direction of the recording paper 2 is set to be obliquely upward from the upstream side of the roller to the downstream side. Thus, in the common transport path 49, the recording paper 2 is transported in the P direction while abutting on the upper surfaces of the platen 3 and the auxiliary platen member 3a.
[0040]
Note that the recording paper conveying force F 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 2 shown in FIG. When the accuracy of feeding the recording paper is affected, a low friction member such as a polymer sheet may be attached to the back surface of the document lower guide member 23.
[0041]
1 and 2, reference numeral 1 denotes an ink cartridge serving as image recording means, and an image recording unit 1A for recording an ink image on a recording material conveyed by a feed roller 10 or a discharge roller 17 is provided with an ink cartridge 1A. This is an ink jet recording system in which ink is ejected from the ink cartridge 1 for recording. 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 generation section for generating droplet forming energy to act on the liquid in the action section. Means.
[0042]
Reference numeral 4 denotes a carriage on which the inkjet cartridge 1 is mounted and which scans in a width direction orthogonal to the conveying direction of the recording paper 2. The carriage 4 has an endless belt-like shape wound around a pulley 5 as shown in FIG. The timing belt 6 is connected, and the carriage 4 can be reciprocated along the guide rail 7 provided on the upper portion of the chassis 24 by rotating the pulley 5 by the carriage drive motor 33 shown in FIG. It has become. When the carriage 4 reciprocates in this manner, an image is recorded on the recording paper 2 by discharging ink from the ink jet cartridge 1 according to image information.
[0043]
By the way, the carriage 4 normally stands by at a standby position at one end (right end) of the guide rail 7 shown in FIG. 7, and when the carriage 4 is located at such a standby position, a print head (not shown) of the inkjet cartridge 1 is provided. Is protected by a rubber member (not shown) so as not to dry. Also, the carriage 4 stays at the standby position during a document image reading operation described later. Further, even when the ink in the ink cartridge 1 runs out, the ink cartridge 1 is replaced by removing the ink cartridge 1 toward the user at the position shown in FIG.
[0044]
Next, an image recording operation of the image recording device 101 configured as described above will be described.
[0045]
When an image signal is input from an external device (not shown), the recording paper separating roller 19 rotates, and accordingly, the pressure plate 9 is raised by the action of a cam (not shown) formed integrally with the recording paper separating roller 19, The recording paper 2 contacts the outer peripheral surface of the recording paper separating roller 19. As a result, the uppermost recording paper 2 a of the recording paper feed tray 8 in contact with the recording paper separation roller 19 is conveyed to the common conveyance path 49 over the separation claw 31 due to friction with the recording paper separation roller 19.
[0046]
Next, the recording paper 2a thus conveyed to the common conveyance path 49 is nipped by the feed roller 10 supported by the platen 3 and the four pinch rollers 16, and is held by the platen 3 and the auxiliary platen member 3a. The recording paper passes through the recording paper supporting surface, which is the upper surface of the supporting portion configured.
[0047]
Then, when the recording paper 2a passes through the recording paper support surface, the ink is ejected from the inkjet cartridge 1 mounted on the carriage 4 that scans (reciprocates) in the width direction of the recording paper 2a in accordance with the image information, thereby recording. An image is recorded on the paper. After the image is recorded in this manner, the recording paper 2a is discharged out of the apparatus by a paper discharge roller 17 as shown by an arrow P.
[0048]
In this embodiment, the printing operation of the recording paper 2 is based on one side (right side) 35b of the base member 35 in FIG. Further, the first recording paper separating roller 19a is arranged at a position close to the one side portion 35b, for example, about 43 mm away from the one side portion 35b, and the second recording paper separating roller 19b sandwiches the document separating roller 15 therebetween. At a position about 189 mm away from one side 35b. By arranging the first and second recording paper separating rollers 19a and 19b in this manner, it is possible to handle recording papers 2 having a wide range of sizes from postcard to A4.
[0049]
Next, the image reading device unit 102 will be described.
[0050]
The image reading device 102 includes an image reading unit 28 described later, a document tray 11 capable of storing a plurality of documents 12 as shown in FIG. 1, and a document 12 set on the document tray 11 by rotating in the direction of an arrow. And a document separation roller 15 for transporting the original.
[0051]
Here, the document separation roller 15 is formed by attaching a cylindrical friction elastic member to a shaft member formed of metal, and is formed on both sides 35a and 35b of the base member 35 as shown in FIG. It is rotatably supported. One end of the shaft 15a of the document separation roller 15 is connected to a drive motor 20 (see FIG. 3) via a read drive transmission unit and a drive switching unit (not shown).
[0052]
The drive switching means is switched by a control means (not shown). In the case of an image recording operation, the drive of the drive motor 20 is transmitted to the recording drive transmitting means to drive the recording paper separating roller 19, and the image is separated. In the case of the reading operation, the drive of the drive motor 20 is transmitted to the document separation roller 15 and the image reading section 28 via the reading drive transmitting means.
[0053]
By the way, the document separation roller 15 is disposed between the recording paper separation rollers 19 (19a, 19b) as shown in FIG. 8 when viewed in the sheet width direction. By arranging the document separation roller 15 at such a position, the document separation roller 19 can be overlapped with the document separation roller 19 in the cross-sectional direction as shown in FIG. 4, and as a result, the facsimile apparatus 100 can be downsized. it can. Further, by arranging the document separation roller 15 substantially at the center in the document width direction, the skew of the document 12 can be reduced.
[0054]
In FIG. 4, reference numeral 13 denotes a separation piece that is pressed against the document separation roller 15 by a separation spring (not shown). The separation piece 13 is formed of a material having a high friction coefficient such as rubber. The document 12 sent out by 15 is held by a separation piece support member 37 rotatably supported by the document lower guide member 23 for directing the document 12 to the common transport path 49. Reference numeral 27 denotes a document transport assisting member that performs an auxiliary operation of document separation by pressing the document 12 against the document separating roller 15.
[0055]
When the document 12 is set on the document tray 11, the leading end of the document 12 stays in a wedge shape constituted by the separation piece 13 and the document separation roller 15. Thereafter, when the document separation roller 15 rotates, Of the originals 12 held in a wedge shape, only the uppermost original 12 a is conveyed by friction with the original separating roller 15. As shown in FIG. 9, a document slider 30 for preventing skew of the document 12 is provided on the document tray 11 so as to be movable in accordance with the width of the document.
[0056]
The image reading unit 28 is disposed between the feed roller 10 and the paper discharge roller 17 and opposite to the platen 3 in the movement path of the carriage 1 as shown in FIG. The upper surface is read, and the facsimile apparatus 100 can be reduced in size by providing the image reading unit 28 in the movement path of the carriage 1 in this manner.
[0057]
Here, the reading unit 28 faces the contact image sensor 22 as an image reading unit, a CS holder 26 as a holding member for holding the contact image sensor (hereinafter, referred to as CS) 22, and the CS holder 26 facing the CS 22. And a white reference member 25 held in a state.
[0058]
The CS 22 is housed in a recess formed in the CS holder 26 so that the sensor surface is on the outside, and is fixed by a screw (not shown) (not shown). The white reference member 25 is formed by attaching a white sheet to a metal plate, and the metal plate has a plane on which the white sheet is attached and bent portions formed at both ends in the longitudinal direction. .
[0059]
A hole is formed in each of the bent portions, and the white reference member 25 can be rotated with respect to the CS holder 26 and the CS 22 by engaging a shaft formed in the CS holder 26 with the hole. I support it. The white reference member 25 is urged toward the CS side by a torsion coil spring (not shown).
[0060]
Further, the white reference member 25 has a projection (not shown) on the outer side in the document width direction, which is in contact with the CS22 in a state where the white reference member 25 is urged against the CS22. A gap G1 (reading conveyance path) through which at least one document can pass is formed between the 25 white sheets.
[0061]
Meanwhile, the white reference member 25, which is a passage member that forms a reading conveyance path together with the CS 22, is biased by a torsion coil spring to form a normal position where a gap G1 shown in FIG. It is possible to take the cleaning position shown in FIG.
[0062]
When the white sheet of the white reference member 25 or the reading surface of the CS 22 is stained by the ink of the recording unit 1A, the user can easily clean the dirty portion by moving the white reference member 25 to the cleaning position. can do.
[0063]
A hollow boss 421 is formed on one side wall surface of the CS holder 26 in the longitudinal direction. The hollow boss 421 is formed on the CS holder support member 68 attached to the platen 3 shown in FIG. The boss 431 is engaged, and the bearing 432 formed on the platen 3 is engaged with the boss 422 formed on the other side wall surface of the CS holder 26.
[0064]
The CS holder 26 is rotatably held in the up and down direction by an engaging portion, which is a hinge portion formed by the bosses 421 and 422 and the boss 431 and the bearing portion 432 provided on the platen side.
[0065]
Here, the left and right engagement portions are coaxial, so that the CS holder 26 does not contact the carriage 4 when the carriage 4 moves in the scanning direction during the image recording shown in FIGS. From the position (standby position), the document reading conveyance path formed in the moving space of the carriage 4 shown in FIGS. 1, 10 and 11 and formed by the gap between the reading surface of the CS 22 and the white reference member 25; 3 can be moved to a second position (reading position) in which the recording paper supporting surface formed of the same 3 is the same surface.
[0066]
Further, the CS holder 26 can be moved to the second position while the ink cartridge 1 is in the capping position (see FIG. 7) at one end (right end) in the carriage movement range when viewed from the discharge direction. The position of the holder 26 in the left-right direction is designed.
[0067]
The upstream side of the metal plate of the white reference member 25 in the document conveying direction has a comb shape, and a platen rib 38 is inserted between the teeth of the comb. A bent portion for increasing the strength in the longitudinal direction is formed on the downstream side of the metal plate in the document conveying direction.
[0068]
Then, when the CS holder 26 moves to the second position, the bent portion pushes down the auxiliary platen member 3a rotatably supported as described above, so that the CS holder 26 moves to the second position. You can do it. As a result, at the time of document reading, the reading conveyance path formed by the white reference member 25 and the CS 22 between the feed roller 10 and the paper discharge roller 17 and the recording paper support surface formed by the platen 3 become the same surface. .
[0069]
Here, when the CS holder 26 moves to the second position, the protrusions 401 and 402 provided on the CS holder 26 shown in FIG. 10 engage with the positioning portions 411 and 412 provided on the upper surface of the platen 3. , Whereby the CS holder 26 is held at the second position.
[0070]
At one end (left end in the width direction) of the CS holder 26, a CS driving unit 74 connected to the driving motor 20 via the driving switching unit 52 and the CS driving transmitting unit 73 shown in FIG. The CS holder 26 can be moved to the first position or the second position by driving the drive motor 20 via the CS driving means 74.
[0071]
In the present embodiment, the auxiliary platen member 3a is pressed down by the white reference member 25. However, the auxiliary platen member 3a may be pressed down by a portion of the CS holder 26 outside the document width. The portion may directly contact the auxiliary platen member 3a to push down the auxiliary platen member 3a.
[0072]
In FIG. 4, reference numeral 14 denotes a document upper guide member formed in a strip shape. The document upper guide member 14 is supported on the shaft 15a of the document separation roller 15 on the upstream side of the conveyance and the document 12 on the downstream side. When pressed, the shaft member 19c of the recording paper separating roller 19 comes into contact with the upper surface 14a.
[0073]
By bringing the upper surface 14a into contact with the shaft member 19c of the recording paper separating roller 19, the guide surface of the upper document guide member 14 is positioned closer to the original than the frictional elastic body of the recording paper separating roller 19. Accordingly, when the document 12 is sent out, it is possible to prevent the document 12 from contacting the frictional elastic body of the recording paper separating roller 19 and causing a conveyance failure.
[0074]
Next, a reading operation of the image reading device unit 102 thus configured will be described.
[0075]
When the reading operation is started in a state where the document 12 is set on the document tray 11, first, the drive of the drive motor 20 is switched via the reading drive transmitting means (not shown) by switching the drive switching means by the control means (not shown). This is transmitted to the document separation roller 15. As a result, the document separating roller 15 rotates in the direction of the arrow, and the documents 12 set on the document tray 11 are separated and sent out one by one by the document separating roller 15 and the separating piece 13 rotating in this manner.
[0076]
In addition, the document separating roller 15 is rotated as described above, and the CS driving means 74 is operated via the CS driving transmitting means 73. In the apparatus standby state, the document separating roller 15 is urged counterclockwise by a torsion coil spring (elastic member) (not shown). 5, the CS holder 26 held at the first position (standby position) is rotated in the direction of the arrow.
[0077]
In this embodiment, by adjusting the gear ratio and the roller diameter of the reading drive transmitting unit and the CS driving transmitting unit 73, the CS holder is moved to the second position before the document 12 reaches the feeding roller 10. Is set to move to.
[0078]
When the CS holder 26 moves to the second position in this way, the clutch connecting the CS drive unit 74 and the CS drive transmission unit 73 is disconnected, and the CS holder 26 stops. At the same time, the white reference member 25 (or CS holder 26 or CS22) pushes down the auxiliary platen member 3a, so that the surface between the feed roller 10 and the discharge roller 17 is flush with the recording paper supporting surface formed by the platen 3. A reading conveyance path is formed.
[0079]
Next, the originals 12 which are separated and sent out one by one are conveyed toward the PES 21 similarly to the recording paper 2 while the lower surface is supported by the original lower guide member 23. At this time, as described above, the phase of the recording paper separating roller 19 in the rotation direction is in the initial state, and the document is provided between the D-shaped notch 19A of the recording and separating roller 19 and the document lower guide member 23. There is a gap G sufficient to pass one sheet (see FIG. 4).
[0080]
As a result, the document 12 passes over the PES 21, is nipped and conveyed by the feed roller 10 and the pinch roller 16 like the recording paper 2, passes through the reading conveyance path formed by the CS 22 and the white reference member 25, and At this time, the image data is read by the CS 22. When the last end of the document 12 is read, the document 12 is discharged to the outside of the apparatus by the discharge roller 17.
[0081]
When the document 12 is discharged in this way, the drive motor 20 rotates in the reverse direction, whereby the CS drive unit 74 and the CS drive transmission unit 73 are connected by the clutch, and the CS holder 26 moves to the first position, The drive switching means 52 is released. Further, as the CS holder 26 moves to the first position, the auxiliary platen member 3a is pushed upward by the urging force of the spring 58, whereby the recording paper support surface of the auxiliary platen member 3a and the recording paper support of the platen 3 are supported. The surface forms a coplanar recording paper support surface.
[0082]
As described above, the auxiliary platen member 3a constituting the supporting portion for supporting the recording paper 2 is provided in the common transport path 49 so as to be retractable, and when reading the document image, the CS holder 26 (CS22 held by the CS holder 26) is By retreating the platen member 3a from the common transport path 49, forming a document transport path in the common transport path 49 and moving the platen member 3a to a position where a document image can be read, it is possible to reduce the size and recording of the apparatus. It is possible to prevent the image reading unit 28 from being stained by ink while maintaining the reading accuracy.
[0083]
In addition, as described above, the separated recording paper 2 and the original 12 are transported by the common feed roller 10 and the discharge roller 17, so that there is no need to separately provide a reading drive motor and an original transport mechanism. The cost can be reduced and the size of the entire apparatus can be reduced.
[0084]
Furthermore, even when the image recording unit 1A having the configuration using the ink jet recording method which is advantageous in terms of downsizing, running cost, etc. is adopted, the CS 22 is connected to the common transport path 49 during the image recording operation as in the present embodiment. In this way, it is possible to prevent contamination due to ink mist and ink leakage during the printing operation, reduce restrictions on layout, and increase design flexibility.
[0085]
Further, at the time of the image recording operation, the CS 22 is retracted from the common transport path 49 so that even if a recording paper jam or the like occurs in the image recording unit 1A, the unfixed ink is applied to the reading surface of the CS 22 or the white reference member 25. It is possible to prevent the trouble of sticking. In addition, by covering the reading surface of the CS 22 with the white reference member 25, it is possible to greatly reduce the contamination of the reading surface of the CS 22 by ink mist.
[0086]
By the way, in the present embodiment, the hollow portions constituting the left and right engaging portions shown in FIGS. 2 and 10 which are hinge portions provided between the common transport path 49 (platen 3) and the CS holder 26 described above. The boss 421 and the boss 431, and the boss 422 and the bearing portion 432 are each provided with a play of about 0.5 mm in the radial direction of the boss or in the device width direction. By providing such a play, the CS holder 26 can move in the radial direction of the boss or the device width direction at the left and right engaging portions.
[0087]
Therefore, when the CS holder 26 is at the second position (reading position), the left and right bosses 421 and 422 of the CS holder 26 are not positioned by the boss 431 of the CS holder support member 68 and the bearing 432 of the platen 3. Absent.
[0088]
For this reason, in the present embodiment, as shown in FIGS. 10 and 12, positioning bosses 401 to 403 which are three projections are provided on the CS holder 26 so as to position the CS holder 26 at the second position. When the CS holder 26 is at the second position indicated by 26a in FIG. 12, the platen 3 has positioning recesses 411 and 412, which are engaging portions that engage with the positioning bosses 401 to 403, respectively. A surface 413 is provided.
[0089]
Here, the positioning bosses 401 to 403 of the CS holder 26 are hemispherical bosses, and the diameter and the height are defined respectively. The concave portion 411 of the platen 3 that fits with the positioning boss 401 is a round hole having a defined depth as shown in FIG. 13A, and the concave portion 412 of the platen 3 that fits with the positioning boss 402 is shown in FIG. As shown in FIG. 3B, the elongated hole extends in the Y direction orthogonal to the document conveying direction P and has a defined depth.
[0090]
Therefore, the positioning of the CS holder 26 in the direction (Y direction) perpendicular to the document conveying direction P (X direction) is determined by the positioning bosses 401 and 402 and the concave portions 411 and 412, and in the vertical direction (Z direction) of the document conveying direction. Is performed by positioning means constituted by positioning bosses 401 to 403, concave portions 411, 412 and receiving surface 413.
[0091]
Here, as described above, in the engaging portion, the CS holder 26 can be moved in the boss radial direction or the apparatus width direction, so that the CS holder 26 moves to the second position. At this time, the CS holder 26 can be in such a posture that the positioning bosses 401 to 403 engage with the concave portions 411, 412 and the receiving surface 413, respectively. Thereby, the CS holder 26 can be easily positioned.
[0092]
As described above, when the CS holder 26 (CS22) moves to the position where the original image can be read as described above, the CS holder 26 causes the positioning bosses 401 to 403 to engage with the concave portions 411, 412 and the receiving surface 413, respectively. By configuring so that the posture can be matched, the CS holder 26, that is, the CS 22 can be easily positioned.
[0093]
When the CS holder 26 is at the second position, the CS holder 26 and the platen 3 (common transport path 49) are engaged at three places, so that the transport direction of the common transport path 49 of the CS 22 (X direction). In addition, since the positioning is performed in the width direction (Y direction), the read image area can be maintained with high accuracy without increasing the position accuracy of the CS holder 26 (CS22).
[0094]
The read image area can be maintained at a high accuracy without increasing the positional accuracy of the CS holder 26 (CS22) in this manner, so that an area for reading the image information of the document with rough component accuracy is determined. As a result, it is possible to provide a low-cost facsimile apparatus 100 with good assembling properties.
[0095]
In the above description, the shape of the concave portion 411 is a circular hole (see FIG. 13). However, the present invention is not limited to this. For example, the Y direction dimensions of the left and right bosses 421 and 422 of the CS holder 26 and the CS holder If the Y-direction dimensions of the boss 431 of the support member 68 and the left boss 432 of the platen 3 are defined, the shape of the concave portion 411 can be the same oval hole as the concave portion 412.
[0096]
In the above description, the case has been described where the positioning means is constituted by three engaging portions. However, the present invention is not limited to this, and may be constituted by four or more engaging portions. .
[0097]
In the above, the case where the CS holder 26 is provided with the projection and the platen 3 is provided with the engagement portion has been described. However, the present invention is not limited to this, and the engagement portion is provided on the CS holder 26 and the projection is provided on the platen 3. A section may be provided. Further, in the above description, the case where the supporting portion for supporting the recording paper 2 is formed by the auxiliary platen member 3a and the platen 3 has been described. However, the present invention is not limited to this, and the supporting portion is supported only by the platen 3. A part may be configured.
[0098]
【The invention's effect】
As described above, as in the present invention, the hinge for holding the image reading means and holding the holding member so that the image reading means can be retracted from the common conveyance path is used. The position of the image reading means can be easily determined by configuring the holding member so that at least three projections can be engaged with the engagement portions when the holding member is moved to a position where the image reading means can be moved. It can be performed. Thus, it is possible to provide an image reading and recording apparatus that can be reduced in size, is low in cost, and has good assemblability.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating a configuration of a facsimile apparatus as an example of an image reading and recording apparatus according to a first embodiment of the present invention.
FIG. 2 is a perspective view illustrating a configuration of a feeding system for recording paper and a document in the facsimile apparatus.
FIG. 3 is a perspective view showing the arrangement of a motor and the white reference member in a separated state in the facsimile apparatus.
FIG. 4 is a cross-sectional view illustrating a configuration of a paper feeding unit and a separating unit in the facsimile apparatus.
FIG. 5 is a cross-sectional view illustrating the overall configuration of the facsimile apparatus during an image recording operation.
FIG. 6 is a perspective view showing a position of an image reading unit and a flow of recording paper during an image recording operation of the facsimile apparatus.
FIG. 7 is a perspective view showing the position of an image recording unit during an image reading operation of the facsimile apparatus.
FIG. 8 is a perspective view showing the flow of recording paper and a document in the facsimile apparatus.
FIG. 9 is a perspective view illustrating the configuration of a document holding unit of the facsimile apparatus.
FIG. 10 is a diagram illustrating a conveyance path of a document passing through a reading unit in the facsimile apparatus.
FIG. 11 is a perspective view showing the position of an image reading unit and the flow of a document during an image reading operation in the facsimile apparatus.
FIG. 12 is a diagram illustrating a configuration of a positioning unit in the facsimile apparatus.
FIG. 13 is an enlarged view illustrating a configuration of a positioning unit of the facsimile apparatus.
FIG. 14 is a diagram showing a schematic configuration of a conventional facsimile machine.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 ink cartridge 1A image recording unit 2 recording paper 3 platen 10 feed roller 12 document 17 discharge roller 20 drive motor 22 contact image sensor 26 CS holder 28 image reading unit 49 common transport path 100 facsimile device 421 hollow boss 431 boss 422 boss 432 Bearing portions 401 to 403 Positioning bosses 411, 412 Positioning recess 413 Receiving surface

Claims (8)

An image reading unit that reads an image of a document, an image recording unit that records an image on a sheet, a document conveyance path that conveys the document to the image reading unit, and a sheet conveyance path that conveys the sheet to the image recording unit. An image reading and recording apparatus, comprising: a document feed path and a common feed path respectively forming a part of the sheet feed path; and reading a document image and recording an image on the sheet in the common feed path. hand,
An image reading unit of the image reading unit that is provided so as to be retractable in the common conveyance path and reads an image of the document;
A holding member for holding the image reading means,
A hinge portion that is provided between the holding member and the common conveyance path and holds the holding member so that the image reading unit can retreat from the common conveyance path;
At least three projections provided on one of the holding member and the common transport path, and engagement members respectively provided on the other of the holding member and the common transport path and engaging with the at least three projections. And a positioning unit for positioning the image reading unit with respect to the common transport path when reading the document image,
With
When the hinge portion is moved to a position where the image reading means can read the document image, the holding member has a posture such that the at least three projections engage with the engagement portions. An image reading / recording apparatus characterized in that it is configured to be able to perform image reading and recording. When the image reading unit reads the document image, the positioning unit forms a reading conveyance path through which the document passes in the common conveyance path, and is positioned at a position where the document image can be read. The image reading and recording apparatus according to claim 1, wherein: The image reading and recording apparatus according to claim 1, wherein the image reading unit performs positioning of the common conveyance path in a conveying direction by the positioning unit. 4. The image reading and recording apparatus according to claim 1, wherein the positioning unit performs positioning of the image reading unit in a width direction orthogonal to a transport direction of the common transport path. 5. . 3. The image reading unit according to claim 1, wherein the positioning unit performs positioning of the common transport path in a transport direction and positioning of the image transport unit in a width direction orthogonal to the transport direction of the common transport path. Image reading and recording apparatus. A common feeding unit that feeds the sheet to the image recording unit or the document to the image reading unit; and a common paper discharging unit that discharges the document or the sheet. The image reading and recording apparatus according to claim 1, wherein the image reading and recording apparatus is arranged. Provided in the common transport path, when recording an image on the sheet, comprising a support member that supports a sheet passing through the image recording unit,
The image reading and recording apparatus according to claim 1, wherein the support member includes the protrusion or the engagement portion. 4. The image recording unit according to claim 1, wherein the image recording unit includes an inkjet image recording unit that records an image on the sheet by moving in a direction perpendicular to a sheet conveying direction while discharging ink. 8. The image reading and recording apparatus according to any one of items 7 to 7.

Images