JP4065519B2 - Image reading and recording device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image reading and recording apparatus integrally including 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 conveyance path for conveying a document to the image reading unit, and a sheet The present invention relates to a configuration in which a part of a sheet conveyance path for conveying the image to the image recording unit is formed by a common conveyance path.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is an image reading and recording apparatus that integrally includes an image reading unit that reads an image of a document and an image recording unit that records (forms) an image on a sheet that is a recording medium. For example, there is a facsimile machine.
[0003]
FIG. 15 is a diagram showing a schematic configuration of a facsimile apparatus which records an image on a sheet by an ink jet recording system which is an example of such a conventional facsimile apparatus. In this facsimile apparatus, a recording sheet which is a sheet is shown. In the case of recording an image on 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 feed roller 304 and a separation mechanism (not shown), and then fed. The image is transferred to the image recording unit 306 by the roller 305.
[0004]
Next, an image is recorded on the recording paper by ejecting ink while moving an ink cartridge, which is an image recording means (not shown), in the scanning direction in the image recording unit 306. After the image is recorded in this manner, the recording paper 301 is discharged out of the apparatus as indicated by an arrow B by the paper discharge roller 307.
[0005]
On the other hand, when reading the image of the original 302, first, the original 302 is set on the original holding member 308 so as to abut against the wedge shape including the original separation roller 309 and the separation piece 313. Next, from the document separation roller 309 that rotates in accordance with the image reading command in this state, only the document in contact with the document separation roller 309 is separated and conveyed by friction among the document 302 held in a wedge shape.
[0006]
Next, a contact image sensor 311 serving as a reading unit provided in the image reading unit while sandwiching the document 302 thus separated and conveyed between the document feeding roller 310, the paper discharge roller 312 and the opposing roller 312a. The image information is read by passing through the upper part. 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]
[Problems to be solved by the invention]
By the way, in the facsimile apparatus (image reading and recording apparatus) having such a configuration, for example, a recording paper conveyance path and a part of the original conveyance path are made common and used for recording paper conveyance so as to meet the market demand for miniaturization. It is conceivable to make the conveying mechanism also serve as the document conveying mechanism. With this configuration, the document feeding roller 310, the paper discharge roller 312 and the driving motor used for document conveyance can be deleted.
[0008]
However, in such a configuration, the recording paper conveyance path and the original conveyance path come close to each other. Therefore, when the original 302 is fed, the original 302 is brought into contact with the recording paper feed roller 304, and the original 302 is moved. There is a problem that it cannot be reliably fed. In addition, when the document 302 is configured to be reliably fed, there is a risk of affecting the conveyance of the recording paper.
[0009]
Accordingly, the present invention has been made in view of such a current situation, and an image reading and recording apparatus that can be reduced in size and cost and can reliably feed a document and a recording sheet (sheet). It is intended to provide.
[0010]
[Means for Solving the Problems]
The present invention provides an image reading and recording apparatus including an image reading unit that reads an image of a document and an image recording unit that records an image on a sheet, and a first stacking unit that loads one of the document and the sheet; A first feeding unit that feeds one of a document and a sheet stacked on one stacking unit; a second stacking unit that is positioned below the first stacking unit and that stacks the other of the document and the sheet; A second feeding means provided downstream in the feeding direction of the first feeding means and having a partially cut-out peripheral surface for feeding the other of the document and sheets stacked on the second stacking unit; A lower guide member that extends from the first stacking unit to the second feeding unit and guides one of the document and the sheet fed by the first feeding unit, and is provided above the lower guide member. And the lower guide member are fed by the first feeding means. An upper guide member that passes through one of the document and the sheet and rotates upward when pressed by one of the document and the sheet, and feeds one of the document and the sheet by the first feeding means. When the second feeding unit is stopped at a position where it does not enter between the lower guide member and the upper guide member, and the upper guide member is pressed by one of the document and the sheet The second feeding means positions the upper guide member at a position where the second feeding means does not enter between the lower guide member and the upper guide member. It is.
[0011]
According to the present invention, when one of the original and the sheet is fed by the first feeding unit, the second feeding unit is configured so that the cutout portion of the peripheral surface of the second feeding unit is It is characterized by being stopped at a position facing the lower guide member.
[0012]
According to the present invention, when the upper guide member is pressed by one of the original and the sheet, the upper guide member is positioned below the notch portion of the second feeding means by the shaft portion of the second feeding means. It is characterized by being positioned by.
[0013]
In the present invention, the upper guide member is characterized in that an upper end portion thereof is rotatably held by the first feeding means.
[0014]
Further, the present invention is characterized in that the shaft portion of the second feeding means has flexibility, and the second feeding means is bent downward by its own weight.
[0015]
Further, the present invention is characterized in that the surface of the cutout portion of the second feeding means is made low in friction.
[0016]
Further, the present invention is characterized in that a low friction member is provided on the surface of the cutout portion of the second feeding means.
[0017]
The present invention further comprises a pressing means for pressing one of the original and the sheet passing between the upper guide member and the lower guide member, The pressing means stops at a position where it does not enter between the lower guide member and the upper guide member. Of the second feeding means Cover the upstream end of the notch It is characterized by this.
[0018]
In the present invention, the pressing means is supported upstream of the second feeding means, and when the second feeding means rotates, when the second feeding means abuts on the second feeding means, The pressing means bends so that the tip portion is located upstream of the position where the second feeding means contacts one of the original and the sheet. It is characterized by this.
[0019]
According to the present invention, a document conveyance path for conveying the document to the image reading unit, a sheet conveyance path for conveying the sheet to the image recording unit, and a part of the document conveyance path and the sheet conveyance path are formed. And a common conveyance path for reading a document image and recording an image on the sheet in the common conveyance path.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0021]
However, the dimensions, materials, shapes, and relative arrangements of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. Absent.
[0022]
FIG. 1 is a cross-sectional view showing a configuration of a facsimile apparatus which is an example of an image reading and recording apparatus according to an embodiment of the present invention.
[0023]
In the figure, reference numeral 100 denotes a facsimile apparatus. The facsimile apparatus 100 includes an image recording apparatus unit 101 having an image recording unit 1A for recording an image on a recording sheet 2 as a sheet, and an image reading unit for reading an image of a document 12. Downstream of the image reading apparatus unit 102 including the unit 28, the recording paper conveyance path R1 through which the recording paper 2 passes, the original conveyance path R2 through which the original 12 passes, and the conveyance direction downstream of the recording paper conveyance path R1 and the original conveyance path R2. And a common conveyance path 49 provided on the side. The common conveyance path (hereinafter referred to as a common conveyance path) 49 includes a conveyance roller 10 that is a common feeding unit that conveys the document 12 and the recording paper 2 and a discharge roller 17 that is a common discharge unit. It is arranged.
[0024]
Next, the configuration of the image recording apparatus unit 101 will be described.
[0025]
The image recording apparatus unit 101 rotates in the direction of arrow A as shown in FIG. 2 and a recording paper tray 8 as a second stacking unit capable of stacking and storing a plurality of recording sheets 2 in addition to an image recording unit 1A described later. The recording paper separating roller 19, the recording paper feeding section 60 having a pressure plate 9, a separating claw 31, and the like that are positioned between the recording paper separating roller 19 and the base member 35 and pivotally supported by the base member 35. And.
[0026]
Here, the recording paper separating roller 19 as the second feeding means is an integrally molded product such as a plastic comprising a shaft portion 19c and two roller portions 19a formed with a diameter larger than that of the shaft portion 19c. A recording paper feed roller rubber made of a friction elastic body for conveying the recording paper 2 around 19a is provided. Further, both end portions of the shaft portion 19c are rotatably supported by the base member 35 as shown in FIG. 3, and one end thereof is connected to a drive motor (not shown) via a drive transmission means 60a.
[0027]
The friction elastic body having a D-shaped cross section constituting the roller portion 19a of the recording paper separating roller 19 is formed by cutting out a part of the peripheral surface of the recording paper separating roller 19 as shown in FIG. As shown in FIGS. 4 and 5, the surface of the notch 19b has a lower friction than the friction elastic body constituting at least the roller 19a. A roller guide 63 formed of a thin metal plate or plastic material having a coefficient is provided.
[0028]
As another configuration for making the surface of the cutout portion 19b have low friction, the recording paper separating roller 19 integrally molds the plastic material of the shaft portion 19c and the friction elastic body of the roller portion 19a with an elastomer. In this way, the surface of the notched portion of the roller portion 19a is formed of plastic, so that it is possible to have a low coefficient of friction without providing the roller guide 63.
[0029]
As shown in FIG. 2, the pressure plate 9 is rotatably held by a base member 35 via pressure plate shafts 9a at the upper ends of both ends. The release cam 64 shown in FIG. As a result of the rotation of the recording paper separating roller 19, the initial position which is the second position for separating the recording paper 2 shown in FIG. 1 from the recording paper separating roller 19 and the roller portion 19a of the recording paper separating roller 19 shown in FIG. The recording paper 2 is brought into contact with the recording paper 2 and moved to a feeding position which is a first position at which the recording paper 2 can be fed by the recording paper separating roller 19.
[0030]
Here, the release cam 64 protrudes from a hole (not shown) formed in the right side plate 35a of the base member 35 shown in FIG. 3 only while the cutout portion 19b of the recording paper separating roller 19 faces the pressure plate 9. The shape is such that the right push-down portion 65 of the pressure plate 9 is pushed down. When a portion other than the notch portion 19b of the recording paper separating roller 19 is opposed to the pressure plate 9, the roller portion 19a must be in contact with the recording paper 2 (or the pressure plate 9). When there is no recording paper 2, the pressure plate 9 is in contact with the pressure plate 9).
[0031]
The recording paper separating roller 19 and the release cam 64 are configured so as to be in phase with each rotation. As a result, when the recording paper separating roller 19 rotates once by the drive from the drive transmission means 60a, the recording cam separating roller 19 and the release cam 64 are rotated. The release cam 64 moves the pressure plate 9 from the initial position to the feeding position, and then sequentially moves to a position where the pressure plate 9 is lowered from the feeding position to the initial position.
[0032]
Further, an auxiliary cam 66 is provided on the left side plate 35b side of the base member 35 of the shaft portion 19c of the recording paper separating roller 19 so as to be in phase with the release cam 64, and when the pressure plate 9 is pushed down by the release cam 64. The auxiliary cam 66 pushes down the left push-down portion 67 of the pressure plate 9 near the left plate 35b of the base member 35.
[0033]
Then, by pressing down the pressure plate 9 by the two cams 64 and 66 in this way, the pressure plate 9 does not tilt with respect to the base member 35 as the recording paper separating roller 19 rotates in the direction indicated by the arrow D in FIG. The recording paper separating roller 19 approaches (contacts) and is separated from the two roller portions 19a of the recording paper separating roller 19 substantially in parallel. Thereby, the recording paper 2 can be reliably sent out.
[0034]
A recording paper separating pad 62 made of a material having a relatively large friction coefficient such as an artificial leather is provided at a position of the pressure plate 9 facing the recording separating roller 19. Such a recording paper separating pad 62 is provided. Thus, even when the number of recording papers 2 is reduced, it is possible to prevent double feeding of the recording papers 2.
[0035]
A side guide 61 is attached to the pressure plate 9 so as to be slidable on the pressure plate 9 in the left-right direction (width direction perpendicular to the conveyance direction of the recording paper 2). , The recording paper 2 having a different size can be set on the reference surface of one side reference, in the present embodiment, on the right side 35a (see FIG. 3) of the base member 35.
[0036]
The separation claw 31 blocks the recording paper 2 loaded on the recording paper tray 8 shown in FIG. When the recording paper separating roller 19 rotates, the uppermost recording paper 2 a that contacts the recording paper separating roller 19 is transported over the separation claw 31 by friction with the recording paper separating roller 19. .
[0037]
By the way, in the present embodiment, the recording paper separating roller 19 stops in the standby state so that the notch portion 19b of the roller portion 19a faces the recording paper 2 substantially in parallel as shown in FIG. In this state, a gap G is formed not only for touching the recording paper 2 but also for allowing the document 12 to pass between the document 12 and the document lower guide member 23 that guides the document 12 to the common transport path 49 described later. Can be done.
[0038]
When the recording paper 2 is conveyed, the recording paper separating roller 19 is rotated so that a partial peripheral surface of the roller portion 19a exceeds the notch 53 shown in FIG. As shown in FIG. 4, the sheet protrudes below the document lower guide member 23 and comes into contact with the uppermost recording sheet 2a of the recording sheet bundle placed on the pressure plate 9.
[0039]
Further, after the recording paper separating roller 19 makes one rotation, the cutout portion 19b shown in FIG. 2 again faces the recording paper 2 and returns to a standby state in which the pressure plate 9 is pushed down by the release cam 64. Accordingly, the second and subsequent recording sheets 2 do not come into contact with the recording sheet separating roller 19 while the conveying roller 10 is conveying the uppermost recording sheet 2a, and the recording sheet 2 can be stably conveyed. It becomes.
[0040]
A PES (Paper / Edge / Sensor) lever 21 for detecting the conveyance of the recording paper 2 (or the original 12) is provided downstream of the recording paper separating roller 19 as shown in FIG. Even if the paper operation is started, if the PES 21S does not detect the passage of the recording paper 2 (or the original 12) via the PES lever 21, the refeeding operation is performed, and the PES 21 still performs the recording paper 2 (or the original 12). When the passage of the ink is not detected, the conveyance operation stops with an error, and an error is displayed on an operation panel (not shown).
[0041]
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 sheet 2 sent out by the recording sheet separation roller 19 passes is for conveying the recording sheet 2 as shown in FIG. 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 support surface on the lower side of the recording paper 2 following the platen 3 are provided.
[0042]
Here, a plurality of ribs 38 are formed in the recording paper width direction on the recording paper support surface of the platen 3 as shown in FIG. 8, and the upper surfaces of the plurality of ribs 38 are recorded when the recording paper is conveyed. Paper 2 passes through.
[0043]
An auxiliary platen member 3a that constitutes a support portion for supporting the recording paper 2 together with the platen 3 as a support member is disposed in a recess formed in the recording paper support surface of the platen 3, and is upstream of the recording paper conveyance direction on both sides. 9 is held by the platen 3 so as to be rotatable in the vertical direction via a shaft 3a1 shown in FIG. 9 and is normally elastically biased by, for example, a spring 58, and the upper recording paper support surface is the platen 3 Is held at a position that is flush with the recording paper support surface constituted by the upper surface of the recording paper.
[0044]
As will be described later, when the auxiliary platen member 3a is pushed from above by the CS holder 26 exceeding the biasing force of the spring 58, the auxiliary platen member 3a sinks about 5 mm into the recording paper support surface of the platen 3. It is designed to rotate.
[0045]
Further, as shown in FIGS. 1, 8, and 9, the common conveyance path 49 is provided in the recording paper width direction in contact with the conveyance roller 10 in addition to the conveyance roller 10 that is pivotally supported by the platen 3. Four pinch rollers 16, an upper guide 42, and a paper discharge unit 47 are provided. The transport roller 10 generates a transport force for transporting the recording paper 2 or the document 12 by the pinch roller 16 biased by the pinch roller spring 41 through the pinch roller guide 36.
[0046]
Here, the conveyance direction of the recording paper 2 by the conveyance roller 10 and the pinch roller 16 is set to be obliquely downward from the upstream side of the roller to the downstream side, and the recording by the discharge roller 17 and the spur 18 is performed. The conveyance direction of the paper 2 is set to be obliquely upward from the roller upstream side to the downstream side. Thereby, in the common conveyance path 49, the recording paper 2 is conveyed in the P direction while being in contact with the upper surfaces of the platen 3 and the auxiliary platen member 3a.
[0047]
The recording paper conveying force F generated by the conveying roller 10 and the pinch roller 16 is large enough to ignore the frictional resistance between the back surface of the lower document guide member 23 and the recording paper 2 shown in FIG. If the recording paper feed accuracy 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.
[0048]
The paper discharge unit 47 includes a paper discharge roller 17 integrally formed of plastic and elastomer, a transmission roller 48 (see FIG. 1) for transmitting the driving of the transport roller 10 to the paper discharge roller 17, and a discharge assisting unit. A plurality of spurs 18 are provided. Here, the spur 18 is pressed against the paper discharge roller 17 by a spur spring (not shown), and the recording paper 2 or the document 12 is discharged out of the apparatus by the paper discharge roller 17 and the spur 18.
[0049]
It should be noted that the number of spurs 18 and the urging force (spur pressure) to the paper discharge roller 17 are set to an appropriate number and spur pressure so that unfixed ink of the recorded image is not stained by the spur 18. Then, 13 spurs 18 are arranged in the width direction of the recording paper 2.
[0050]
These drives are driven by a single drive motor. Therefore, it is not necessary to separately provide a drive motor for reading and a document transport mechanism, so that the cost can be reduced and the entire apparatus can be reduced in size.
[0051]
1 and 8, reference numeral 1 denotes an ink cartridge which is an image recording unit. The image recording unit 1A for recording an ink image on a recording material conveyed by the conveying roller 10 or the paper discharge roller 17 has an ink cartridge. This is an ink jet recording method in which ink is ejected from the cartridge 1 for recording. The ink cartridge 1 includes a fine liquid discharge port (orifice), a liquid path, an energy action part provided in a part of the liquid path, and energy generation that generates liquid droplet formation energy that acts on the liquid in the action part. Means.
[0052]
A carriage 4 is mounted with the ink cartridge 1 and scans in the width direction orthogonal to the conveyance direction of the recording paper 2. The carriage 4 has an endless belt-like shape stretched between a driving pulley (not shown) and a driven pulley 4b. The timing belt 4a 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 driving pulley. When the carriage 4 reciprocates as described above, an image is recorded on the recording paper 2 by ejecting ink from the ink cartridge 1 according to the image information.
[0053]
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 FIGS. 8 and 10, and when the carriage 4 is in such a standby position, a document image which will be described later is used. Even during the reading operation, the carriage 4 remains in the standby position.
[0054]
Further, even when the ink in the ink cartridge 1 runs out, the ink cartridge 1 is replaced at the position shown in FIG. 8 by removing it in the direction of arrow E in FIG. In addition, by replacing the ink cartridge 1 at such a standby position, the ink cartridge 1 can be replaced without the reading unit 28 described below getting in the way.
[0055]
Next, an image recording operation of the image recording apparatus unit 101 configured as described above will be described.
[0056]
When an image signal is input from an external device (not shown) with the recording paper 2 set on the recording paper tray 8, the transport roller 10 is driven first, and the drive is applied to the recording paper separation roller 19 and the release cam 64. When transmitted, the recording paper separating roller 19 and the release cam 64 rotate as shown in FIG.
[0057]
As a result, the pressure plate 9 rises to the position shown in FIG. 4 so that the recording paper separating roller 19 and the recording paper 2 come into contact with each other. As a result, the recording paper 2 is picked up as the recording paper separating roller 19 rotates in the arrow D direction. It is conveyed toward the common conveyance path 49.
[0058]
At this time, the recording paper 2 conveyed by the recording paper separating roller 19 is blocked by the separation claw 31, but only the uppermost recording paper 2a set by friction with the roller portion 19a of the recording paper separating roller 19 is separated. It is transported over the claw 31 toward the common transport path 49. The recording paper separating roller 19 and the release cam 64 make one rotation until the recording paper 2 is sent to the common conveying path 49, and the driving from the conveying roller 10 is performed with the pressure plate 9 released again with respect to the recording separating roller 19. It is cut and keeps this initial state.
[0059]
Next, the recording paper 2 conveyed toward the common conveyance path 49 is guided by the platen 3, the pinch roller guide 36, and the upper guide 42, and enters the nip between the conveyance roller 10 and the pinch roller 16 while pushing down the PE sensor lever 21. Be transported. Here, when the PE sensor lever 21 is pushed down in this way, a detection signal is input from the PE sensor 21S to a control means (not shown), and the control means detects the leading edge of the recording paper 2 based on the detection signal and performs recording. The print position on the paper 2 is obtained.
[0060]
Next, the recording paper 2 conveyed to the conveying roller 10 and the pinch roller 16 is sandwiched between the conveying roller 10 and the four pinch rollers 16, and on the upper surface of the support portion constituted by the platen 3 and the auxiliary platen member 3 a. It passes through a certain recording paper support surface.
[0061]
Then, when passing through the recording paper support surface in this way, the ink from the ink cartridge 1 mounted on the carriage 4 that scans (reciprocates) in the width direction of the recording paper 2a in the image recording unit 1A is supplied in accordance with the image information. Is ejected to record an image on the recording paper. Thereafter, after the image is recorded, the recording paper 2a is discharged out of the apparatus by the paper discharge roller 17 as indicated by an arrow P.
[0062]
In the present embodiment, as described above, the printing operation of the recording paper 2 is based on one side (right side) 35a of the base member 35 in FIG. Further, the two roller portions 19a of the recording paper separating roller 19 are disposed at positions separated from the one side portion 35a by about 40 mm and about 180 mm, for example. By arranging the two roller portions 19a in this way, it is possible to deal with recording papers 2 of a wide size from postcards to A4.
[0063]
Next, the image reading device unit 102 will be described.
[0064]
In addition to an image reading unit 28 to be described later, the image reading device unit 102 includes a document tray 11 that is a first stacking unit capable of storing a plurality of documents 12 as shown in FIG. 1, and a document 12 set on the document tray 11. The document feeder 50 is provided upstream of the recording paper feeder 60 and is transported by the first feeding means. A document separation roller 15, a document feeding roller 51, a document feeding roller 52, a document upper guide 14 and the like are provided.
[0065]
The document feeder 50 is based on one side of the document 12, and in this embodiment, as shown in FIG. 11, the inner wall of the left side plate 11a of the document tray 11 serves as the document reference. Yes. The document tray 11 is provided with a document slider 30 for preventing skew feeding, and can be moved according to the width of the document 12.
[0066]
Here, the document separation roller 15 conveys the document 12 set on the document tray 11 by rotating in the direction of the arrow, and is rotatably supported on both side portions 35 a and 35 b of the base member 35. One end of the shaft 15a (see FIG. 5) of the document separation roller 15 is connected to a drive motor via a reading drive transmission means and a drive switching means (not shown).
[0067]
This drive switching means is switched by a control means (not shown), and in the case of an image recording operation, the drive of the drive motor is transmitted to the recording drive transmission means to drive the recording paper separating roller 19 to read the image. In the case of operation, the drive of the drive motor is transmitted to the document separation roller 15, the document feeding roller 51, and the image reading unit 28 via the reading drive transmission means.
[0068]
In FIG. 2, reference numeral 13 denotes an original separating piece pressed against the original separating roller 15 by a separating spring 54. The original separating piece 13 is made of a material having a high friction coefficient such as rubber, and the original separating roller. 15 is held by a separation piece support member 37 that is pivotally supported by a document lower guide member 23 for directing the document 12 fed by 15 toward the common conveyance path 49. Reference numeral 27 denotes a document conveyance auxiliary member that performs an auxiliary operation for document separation by pressing the document 12 against a document separation roller 15 (not shown).
[0069]
When the document 12 is set on the document tray 11, the document 12 comes to stay in a wedge shape having the leading end constituted by the separation piece 13 and the document separation roller 15. Thereafter, the document separation roller 15 is moved in the direction of arrow C. , The uppermost document 12 a is conveyed by friction with the document separation roller 15 among the documents 12 held in the wedge shape. As shown in FIG. 11, the document tray 11 is provided with a document slider 30 for preventing the skew of the document 12 so as to be movable according to the width of the document.
[0070]
The document feeding roller 51 is configured by attaching a cylindrical friction elastic member to a shaft member made of metal, and is rotatably supported on the side plates 35a and 35b of the base member 35. One end of the shaft is read. It is connected to the drive transmission means. The document feeding roller 52 is urged by a document feeding roller spring (not shown) to the document feeding roller 51 to generate a document conveying force.
[0071]
The document upper guide 14 is disposed above the document lower guide member 23, which is a lower guide member, and constitutes the upper surface of the document transport path R2. The document upper guide 14, which is the upper guide member, has a strip shape. As shown in FIG. 2, the upper end of the original separation roller 15 is pivotally supported on the shaft portion 15a, and the upper end of the upper end of the original is suspended on the lower document guide 23 by its own weight. Is configured.
[0072]
Here, the document upper guide 14 is formed of a resin having good slidability and has a light weight and can be rotated with a light force around the shaft portion 15 a of the separation roller 15. Is transported between the document upper guide 14 and the document lower guide member 23 by the document feed roller 51 or the transport roller 10, the document separation roller 15 is rotated by the flutter of the document 12 and the leading or trailing edge of the document 12. It can be pushed upward as the center. Then, by pushing up the document upper guide 14 in this way, the document conveyance path R2 is secured.
[0073]
The feed speeds of the document feed roller 51 and the transport roller 10 are set to be the same. However, if the transport roller 10 is faster due to a dimensional tolerance of each roller diameter, the document 12 is the document feed roller. The document 12 is tensioned while being sandwiched between the transport roller 15 and the transport roller 10. Such tension causes a force to push the document upper guide 14 upward, thereby pushing up the document upper guide 14.
[0074]
Here, when the document upper guide 14 is pushed up by the tension applied to the document 12 being conveyed in this way, the document upper guide 14 is bent (deformed) upward as shown in FIG. Even though the upper document guide 14 is in contact with the shaft portion 19c of the recording paper separating roller 19 as described above, the cutout portion 19b of the recording paper separating roller 19 is used. Also, the guide surface of the document upper guide 14 is configured to be positioned on the document conveyance path R2 side.
[0075]
That is, when the document 12 is conveyed, even if the document 12 is pushed up by the document 12, the document upper guide 14 causes the recording sheet separation roller 19 to abut the document 12 by the recording sheet separation roller 19 (the shaft portion 19 c). It will be positioned at a position that is not. Thus, when the document 12 is transported, the recording paper separating roller 19 does not contact the document 12 and does not hinder the transport of the document 12.
[0076]
Further, as described above, since the shaft portion 19c of the recording paper separating roller 19 is formed of a flexible material such as plastic, the recording paper separating roller 19 may be bent downward by its own weight. Even in such a case, since the document upper guide 14 contacts the shaft portion 19c of the recording paper separating roller 19 in a bent state, the relative positional relationship between the recording paper separating roller 19 and the document upper guide 14 is maintained, and the document is conveyed. The cutout portion 19b of the recording paper separating roller 19 does not protrude on the path R2. Thus, the document 12 is reliably and stably fed without contacting the recording paper separating roller 19.
[0077]
Furthermore, since the roller guide 63 made of a low friction material is attached to the notch portion 19b of the recording paper separating roller 19 as described above, the document 12 contacts the roller portion 19a of the recording paper separating roller 19. Even in this case, it is possible to prevent a conveyance failure.
[0078]
By the way, in the present embodiment, as shown in FIG. 11, two document upper guides 14 (14a, 14b, 14c, 14d) are provided on the left and right sides of the frictional elastic member of the document separation roller 15 in total. In addition, the upper and lower document upper guides 14 b and 14 c are arranged at the same position as the roller portion 19 a of the recording paper separating roller 19.
[0079]
Here, as described above, the two roller portions 19a of the recording paper separating roller 19 are provided at positions of about 40 mm and about 180 mm from the recording paper reference (inner wall of 35a), respectively. This is the inner wall of the left side plate 11 a of the tray 11.
[0080]
Accordingly, the position in the width direction orthogonal to the conveyance direction of the recording paper 2 and the document 12 differs by about 40 mm in the present embodiment. For example, when the A4 size recording paper 2 and the original 12 are conveyed, the original 12 is conveyed to a position shifted by 41.5 mm to the left from the recording paper 2 toward the apparatus.
[0081]
Further, as shown in FIG. 5, since the center in the width direction is notched from the middle to the lower part of the document upper guide 14, the roller portion 19a and the document upper surface are rotated when the recording paper separating roller 19 is rotated. The guide 14 does not interfere. Further, as shown in FIG. 6 described above, the lower document guide member 23 that extends to the recording paper separating roller 19 and forms the lower surface of the document transport path R2 until the document 12 is sent to the common transport path 49. A cutout portion 53 is provided at a location where the roller portion 19 a of the recording paper separating roller 19 is disposed.
[0082]
Therefore, as shown in FIG. 4, when the recording paper separating roller 19 is rotated and the recording paper 2 is fed, the roller portion 19a of the recording paper separating roller 19 is notched in the document upper guide 14 and the document lower guide member 23. Since the rotation exceeds 53, the recording paper 2 can be reliably fed without interfering with these.
[0083]
Further, as shown in FIG. 5, the upper document guide 14 and the lower document guide member 23 are formed in the cutout portions of the two document upper guides 14 disposed at the position of the roller portion 19 a of the recording paper separating roller 19. A flexible document pressing member 55 is attached as a pressing means for pressing the document 12 passing there between. The lower end portion 55a of the document pressing member 55 is an upper portion of a crescent-shaped region formed by the rotation radius of the roller portion 19a of the recording paper separating roller 19 and the cutout portion 19b, which is indicated by a dashed line in FIG. It extends into the region 19d.
[0084]
Here, by extending the lower end portion 55a of the document pressing member 55 to such a region 19d, the document conveying path R2 is secured, and the corner of the cutout portion 19b of the recording paper separating roller 19 is secured by the document pressing member 55. The upper portion of the roller guide 63 attached to the portion 19e and the notch portion 19b can be covered, so that when the document 12 is conveyed, the leading end of the document 12 is the corner 19e of the roller portion 19a or the end of the roller guide 63. It is possible to prevent the sheet from being caught and being poorly conveyed.
[0085]
As shown in FIG. 13, when the recording paper separating roller 19 rotates in the direction of the arrow D, the roller portion 19a interferes (contacts) with the document pressing member 55. In such a case, the document pressing member 55 Since it bends, the rotation of the recording paper separating roller 19 is not hindered.
[0086]
Further, as shown in FIG. 5, two thin arm portions 55b are formed on the upper portion of the document pressing member 55, and the document pressing member 55 is attached to the document upper guide 14 by the arm portions 55b.
[0087]
Here, when the document pressing member 55 is attached to the document upper guide 14 by the arm portion 55b provided on the upper portion as described above, that is, supported on the upstream side of the recording sheet separating roller 19, the recording sheet 2 is recorded. When the original pressing member 55 interferes with the recording paper separating roller 19 in contact with the roller portion 19a of the paper separating roller 19, a point 55c at which the original pressing member 55 bends as shown in FIG. It becomes the top of.
[0088]
When the document pressing member 55 is bent at the upper portion in this way, the lower end portion 55a of the bent document pressing member 55 does not extremely approach the recording paper 2 and the roller portion of the recording paper separating roller 19 Since it moves to the upstream side from the nip position of 19a and the recording paper 2, it does not contact the recording paper 2. As a result, the recording paper 2 is conveyed without being disturbed by the bent document pressing member 55.
[0089]
As shown in FIGS. 1 and 9, the image reading unit 28 is arranged between the conveyance roller 10 and the paper discharge roller 17 and is opposed to the platen 3 in the movement path of the carriage 4, and is conveyed. The facsimile apparatus 100 can be miniaturized by providing the image reading unit 28 in the movement path of the carriage 4 in this way.
[0090]
Here, the reading unit 28 is a contact image sensor 22 that is an image reading unit, a CS holder 26 that is a holding member that holds a contact image sensor (hereinafter referred to as CS) 22, and a CS holder 26 that faces the CS 22. And a white reference member 25 held in a state.
[0091]
The CS 22 is accommodated in a recess formed in the CS holder 26 so that the sensor surface is on the outside, and is fixed with a screw (fastening member) (not shown). The white reference member 25 is formed by attaching a white sheet to a metal plate, and the metal plate includes a flat surface for attaching the white sheet and bent portions formed at both ends in the longitudinal direction. .
[0092]
A hole is formed in both bent portions, and the white reference member 25 can be rotated with respect to the CS holder 26 and CS 22 by engaging a shaft formed in the CS holder 26 in this hole. I support it. The white reference member 25 is urged toward the CS side by a torsion coil spring (not shown).
[0093]
Further, the white reference member 25 has a projection (not shown) that abuts against the CS 22 in a state of being biased with respect to the CS 22 on the outside in the document width direction. A gap G1 (reading conveyance path) through which at least one document shown in FIG. 9 can pass is formed between the 25 white sheets.
[0094]
By the way, the white reference member 25 that forms the reading conveyance path together with the CS 22 is urged by the torsion coil spring to form a gap G1 through which one document can pass, and the white reference member 25 against the torsion coil spring. It is possible to take a cleaning position that is rotated in the direction of separating the CS 22 from the CS 22.
[0095]
When the white sheet of the white reference member 25 or the reading surface of the CS 22 becomes dirty with the ink of the image recording unit 1A, the user can easily remove the dirty portion by moving the white reference member 25 to the cleaning position. Can be cleaned.
[0096]
A boss 26a is formed on one side wall surface of the CS holder 26 in the longitudinal direction, and a boss 68b is formed on the other side wall surface of the CS holder 26. 14, the hollow boss 68 a formed on the CS holder supporting member 68 attached to the platen 3 is engaged, and the bearing portion 69 formed on the platen 3 is engaged with the boss 68 b formed on the other side wall surface. is doing.
[0097]
These left and right engaging 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 image recording shown in FIG. 1) within the moving space of the carriage 4 shown in FIG. 1 and formed by a gap between the reading surface of the CS 22 and the white reference member 25, and a recording paper support surface constituted by the platen 3. Can be moved to a second position (reading position) on the same plane.
[0098]
Further, the CS holder 26 can be moved to the second position when the ink cartridge 1 is in the capping position (see FIG. 8) at one end (right end) within the carriage movement range when viewed from the discharge direction. The position of the holder 26 in the left-right direction is designed.
[0099]
Further, the upstream side of the white reference member 25 in the document conveying direction has a comb-tooth shape, and a platen rib 38 is inserted between the teeth of the comb teeth. 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.
[0100]
Then, when the CS holder 26 moves to the second position, the CS holder 26 moves to the second position by pushing down the auxiliary platen member 3a supported so that the bent portion can turn as described above. Can be done. Thereby, at the time of document reading, the reading conveyance path formed by the white reference member 25 and CS 22 and the recording paper support surface constituted by the platen 3 between the conveyance roller 10 and the paper discharge roller 17 become the same surface.
[0101]
Here, when the CS holder 26 is moved to the second position, the protrusions 401 and 402 provided on the CS holder 26 shown in FIG. 9 are engaged with the positioning portions 411 and 412 provided on the upper surface of the platen 3. Thus, the CS holder 26 is held in the second position.
[0102]
Further, CS drive means connected to a drive motor via drive switching means and CS drive transmission means (not shown) is arranged at one end portion (left end portion in the width direction) of the CS holder 26. The CS drive means The CS holder 26 can be moved to the first position or the second position by driving the drive motor via the.
[0103]
Next, an image reading operation of the image reading apparatus unit 102 configured as described above will be described.
[0104]
When the reading operation is started in a state where the document 12 is set on the document tray 11, first, the drive separation unit 15 is switched by the control unit (not shown) to drive the drive motor via the reading drive transmission unit. Then, it is transmitted to the document feeding roller 51. Thereby, the document separating roller 15 and the document feeding roller 51 rotate in the direction of the arrow shown in FIG. 2, and the document tray 11 is constituted by the document feeding roller 51 rotating in this way, the document separating roller 15 and the separating piece 13. The originals 12 set in are separated and sent out one by one.
[0105]
At this time, as described above, the phase in the rotational direction of the recording paper separating roller 19 arranged downstream of the feeding direction of the document separating roller 15 is in an initial state, and the roller portion 19a of the recording separating roller 19 is in the initial state. A sufficient gap G is formed between the notch 19b and the document lower guide member 23 to pass one document (see FIG. 2).
[0106]
Further, the document separating roller 15 is rotated in this way and the CS driving means is operated via the CS drive transmission means, and is biased counterclockwise by a torsion coil spring (elastic member) (not shown) in the apparatus standby state. 7, the CS holder 26 held at the first position (standby position) is rotated in the direction of the arrow.
[0107]
In this embodiment, the CS holder moves to the second position before the document 12 reaches the transport roller 10 by adjusting the gear ratio and roller diameter of the reading drive transmission means and the CS drive transmission means. It is set to be.
[0108]
When the CS holder 26 moves to the second position in this way, the clutch connecting the CS drive means and the CS drive transmission means is disconnected, the CS holder 26 stops, and a second coil spring (not shown) (not shown) The elastic member is biased at that position. At the same time, when the CS holder 26 pushes down the auxiliary platen member 3a, a reading conveyance path having the same surface as the recording paper support surface constituted by the platen 3 is formed between the conveyance roller 10 and the paper discharge roller 17. .
[0109]
Next, the original 12 separated and fed one by one is guided by the platen 3, the pinch roller guide 36, and the upper guide 42 in the same manner as the recording paper 2 while the lower surface is supported by the original lower guide member 23, and PE The sensor lever 21 is pushed down and conveyed to the nip between the conveying roller 10 and the pinch roller 16.
[0110]
When the PE sensor lever 21 is pushed down in this way, a detection signal is input from the PE sensor 21S to a control means (not shown), and the control means detects the leading edge of the document 12 based on the detection signal, and the document 12 The reading position above is obtained.
[0111]
Next, the document 12 conveyed to the conveyance roller 10 and the pinch roller 16 is sandwiched between the conveyance roller 10 and the four pinch rollers 16 and passes through the reading conveyance path formed by the CS 22 and the white reference member 25. The image data is read by the CS 22 during this passage. When the last end of the document 12 is read, it is discharged out of the apparatus by the discharge roller 17.
[0112]
When the document 12 is discharged in this manner, the drive motor 20 rotates in reverse, whereby the CS drive means and the CS drive transmission means are connected by a clutch, and the CS holder 26 is moved to the first position by the torsion coil spring described above. Move to position 1.
[0113]
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 recording paper support surface having the same planar shape is formed by the surface. Finally, the drive switching unit switches the drive of the drive motor to the recording mode, and the apparatus enters a standby state.
[0114]
As described above, the auxiliary platen member 3a that constitutes a support portion that supports the recording paper 2 is provided in the common conveyance path 49 so as to be retractable, and the CS holder 26 (CS22 held by the auxiliary member) is used as an auxiliary when reading a document image. By retracting the platen member 3a from the common conveyance path 49, the original conveyance path is formed in the common conveyance path 49 and moved to a position where the original image can be read, thereby reducing the size and recording of the apparatus. It is possible to prevent the image reading unit 28 from being stained with ink while maintaining the reading accuracy.
[0115]
Further, as described above, the separated recording paper 2 and the original 12 are conveyed by the common conveying roller 10 and the discharge roller 17, so that it is not necessary to separately provide a reading drive motor and an original conveying mechanism. As a result, the entire apparatus can be downsized.
[0116]
Further, even when the image recording unit 1A having the configuration using the ink jet recording method which is advantageous in terms of downsizing and running cost is employed, the CS 22 is connected to the common conveyance path 49 during the image recording operation as in the present embodiment. By evacuating from the position, it is possible to prevent contamination due to ink mist and ink leakage during the recording operation, and it is possible to reduce layout restrictions and increase the degree of freedom during design.
[0117]
Furthermore, during the image recording operation, the CS 22 is retracted from the common conveyance path 49 so that unfixed ink can be transferred to the reading surface of the CS 22 or the white reference member 25 even if a recording paper jam or the like occurs in the image recording unit 1A. It is possible to prevent the occurrence of troubles such as adhesion. Further, by covering the reading surface of the CS 22 with the white reference member 25, it is possible to significantly reduce the stain due to the ink mist on the reading surface of the CS 22.
[0118]
Further, as in the present embodiment, when the document 12 is fed, the recording paper separating roller 19 is moved over the document upper guide 14 and the document lower guide member 23 with the notch portion 19b facing the document lower guide member 23. For example, even when the original 12 is being fed, the recording paper 2 can be fed appropriately.
[0119]
Further, when the document 12 is fed, even when the document upper guide 14 provided above the document lower guide member 23 is pressed by the document 12 and rotated upward, the document upper guide 14 is moved to the recording paper separating roller 19. The original 12 is brought into contact with the recording paper separating roller 19 by positioning the recording paper separating roller 19 so that the notch 19b does not protrude from the original conveying path R2. Therefore, the feeding can be performed reliably and stably.
[0120]
Further, a document pressing member 55 is provided at a portion of the recording paper separating roller 19 where the document upper guide member 14 cannot be disposed, and the document passing between the document upper guide 14 and the document lower guide member 23 by the document pressing member 55. By pressing the sheet 12 so as not to contact the recording paper separating roller 19, the document 12 can be fed reliably and stably.
[0121]
In the present embodiment, the document tray 11 is disposed above the recording paper tray 8, and the document separation roller 15 is provided upstream of the recording paper separation roller 19 in connection with this. The recording paper tray 8 may be disposed above the document tray 11 and the recording paper separation roller 19 may be provided upstream of the document separation roller 15. In this case, the recording paper 2 can be fed reliably and stably.
[0122]
【The invention's effect】
As described above, when one of the original and the sheet is fed by the first feeding unit as in the present invention, the position where the second feeding unit does not enter between the lower guide member and the upper guide member. And when the upper guide member is pressed by one of the document and the sheet, the second guide means causes the upper guide member to enter between the lower guide member and the upper guide member. By positioning at the position where the sheet is not placed, it is possible to prevent one of the original and the sheet from coming into contact with the second feeding unit. As a result, the size and cost can be reduced, and the original and the sheet can be reliably fed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a facsimile machine as an example of an image reading and recording apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view illustrating a configuration of a recording paper and document feeding system in the facsimile apparatus.
FIG. 3 is a perspective view illustrating a configuration of a recording paper feeding unit in the facsimile apparatus.
FIG. 4 is a cross-sectional view showing a configuration of a recording paper feeding unit in the facsimile apparatus.
FIG. 5 is a perspective view from the rear of the apparatus showing a configuration of a recording paper separating roller and a document upper guide in the facsimile apparatus.
FIG. 6 is a perspective view from the rear of the apparatus showing a configuration of a recording paper separating roller and a document lower guide member of the facsimile apparatus.
FIG. 7 is a cross-sectional view showing an overall configuration during a recording operation of the facsimile apparatus.
FIG. 8 is a perspective view illustrating replacement of an ink cartridge in the facsimile apparatus.
FIG. 9 is a diagram illustrating a conveyance path of a document passing through an image reading unit in the facsimile apparatus.
FIG. 10 is a perspective view illustrating an arrangement configuration of an image recording unit and an image reading unit during a recording operation in the facsimile apparatus.
FIG. 11 is a perspective view showing a configuration of a document feeder in the facsimile apparatus.
FIG. 12 is a cross-sectional view illustrating a configuration of a document pressing member provided on a recording paper separating roller of the facsimile apparatus.
FIG. 13 is a cross-sectional view showing a state when the document pressing member interferes with a recording paper separating roller.
FIG. 14 is a perspective view illustrating an arrangement configuration of a reading unit and a recording unit when reading a document in the facsimile apparatus.
FIG. 15 is a diagram showing a schematic configuration of a conventional facsimile apparatus.
[Explanation of symbols]
1 Ink cartridge
1A Image recording unit
2 Recording paper
8 Recording paper tray
10 Transport roller
11 Document tray
12 Manuscript
14 Document guide
15 Document separation roller
19 Recording paper separation roller
19b Notch
19c Shaft
19d upper region
22 Contact image sensor
23 Lower Document Guide
28 Image reading unit
49 Common transport path
50 Document feeder
55 Document holding member
100 facsimile machine

Claims (10)

In an image reading and recording apparatus including an image reading unit that reads an image of a document and an image recording unit that records an image on a sheet,
A first stacking unit for stacking one of the original and the sheet;
First feeding means for feeding one of a document and a sheet stacked on the first stacking unit;
A second stacking unit positioned below the first stacking unit and stacking the other of the document and the sheet;
A second feeding unit provided downstream in the feeding direction of the first feeding unit and having a notched partial circumferential surface for feeding the other of the document and the sheet stacked on the second stacking unit;
A lower guide member extending from the first stacking unit to the second feeding unit and guiding one of the document and the sheet fed by the first feeding unit;
When one of the original and the sheet, which is provided above the lower guide member and is fed by the first feeding means, passes between the lower guide member and is pressed by one of the original and the sheet An upper guide member that pivots upward;
With
When feeding one of the original and the sheet by the first feeding means, the second feeding means is stopped at a position where it does not enter between the lower guide member and the upper guide member; and When the upper guide member is pressed by one of the document and the sheet, the second guide means causes the upper guide member to be placed between the lower guide member and the upper guide member. An image reading and recording apparatus characterized in that it is positioned at a position that does not enter.   When one of the original and the sheet is fed by the first feeding unit, the second feeding unit is faced with a notch on the peripheral surface of the second feeding unit facing the lower guide member. 2. The image reading and recording apparatus according to claim 1, wherein the image reading and recording apparatus is stopped at a position.   When the upper guide member is pressed by one of the original and the sheet, the upper guide member is positioned below the notch portion of the second feeding means by the shaft portion of the second feeding means. The image reading and recording apparatus according to claim 1 or 2.   4. The image reading and recording apparatus according to claim 1, wherein an upper end portion of the upper guide member is rotatably held by the first feeding unit. 5.   5. The image reading and recording apparatus according to claim 3, wherein the shaft portion of the second feeding unit has flexibility, and the second feeding unit bends downward due to its own weight.   The image reading and recording apparatus according to claim 1, wherein a surface of the cutout portion of the second feeding unit is made to have low friction.   The image reading and recording apparatus according to claim 6, wherein a low friction member is provided on a surface of the cutout portion of the second feeding unit. A pressing means for pressing one of the original and the sheet passing between the upper guide member and the lower guide member;
2. The upstream end portion of the notch portion of the second feeding unit that is stopped at a position where it does not enter between the lower guide member and the upper guide member is covered by the pressing unit. 8. The image reading and recording apparatus according to any one of items 1 to 7. When the pressing means is supported upstream of the second feeding means, and the second feeding means rotates, when the second feeding means comes into contact with the second feeding means, the pressing means is moved by the second feeding means. 9. The image reading and recording apparatus according to claim 8, wherein the image reading and recording apparatus is bent so that the leading end portion is positioned upstream of a position in contact with one of the original and the sheet .   A document conveyance path that conveys the document to the image reading unit, a sheet conveyance path that conveys the sheet to the image recording unit, and a common conveyance path that respectively forms part of the document conveyance path and the sheet conveyance path. 10. The image reading and recording apparatus according to claim 1, wherein the document image is read and the image is recorded on the sheet in the common conveyance path.

Images