JP3421169B2 - Paper transport device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device attached to a recording device, and more particularly, to a recording portion of a recording device capable of recording an image on one surface side and ejecting the discharged paper on the other surface side. The present invention relates to a sheet conveying device that conveys a sheet again.

[0002]

2. Description of the Related Art Conventionally, a recording apparatus for recording an image is provided with a conveying mechanism for conveying the sheets separated and fed one by one from a sheet cassette to a recording section. There are also those that can be recorded, and those that can reverse the paper with the image recorded on one side and re-convey to the other side so that images can be recorded again. Image recording on the other side is removable. Some are carried out by a paper transport device.

A sheet conveying device which can be attached to and detached from a recording device of this type is described in, for example, Japanese Patent Laid-Open No. 6-110274. In this paper transport device, the transport mechanism of the recording device transports the paper from the lower part of the recording device to the recording part and then switches the delivery path of the paper to be ejected to the upper ejection tray, so that the paper is ejected to the outside of the ejection tray. It is configured to carry out the paper with the end clamped, and then to convey the rear end as the leading end side to reverse the sheet and re-convey it to the recording unit from the index port of the recording device. After the image is recorded on the one side of the sheet conveyed by the conveying mechanism by the recording unit, the image is recorded on the both sides by recording the image on the other side of the sheet that has been reversed and reconveyed by the sheet conveying device.

[0004]

However, in such a conventional sheet conveying apparatus, the sheet is mounted on the front panel of the recording apparatus attached to open and close the conveying path of the conveying mechanism. Therefore, the load of the paper transporting device is applied to the front panel and its opening / closing mechanism, causing distortion in the internal transporting path and the like, which causes a problem in transporting operation and opening / closing operation. In addition, there is a problem in that the opening and closing mechanism is greatly affected by inertia during opening and closing and during transportation. If the front panel and the opening / closing mechanism are reinforced in order to solve this problem, there is a problem that the reinforcement itself increases the weight and increases the cost.

Further, when assembling the sheet conveying device to the recording apparatus having the operation panel on the front cover as in the above-mentioned conventional example, the operation panel must be removed, and the assembling work is complicated and difficult. Further, since the paper transporting device is located in the vicinity of the transporting path inside the recording device, for example, the fixing unit generates heat, so that the heat exhaust port provided on the front panel is closed and the temperature inside the recording device rises, which causes a problem. There was also a problem that it would occur.

Therefore, according to the present invention, the re-conveyance path is set below the recording device to circulate the paper, thereby reducing the load applied to the recording device, and improving the transportability and cost of the recording device. The purpose is to

It is an object of the present invention to maintain / improve the assembling accuracy of a recording device or a transport path to improve the transportability. It is an object of the present invention to improve the operability by adapting to the system of a recording apparatus and corresponding to the installation and maintenance thereof. The present invention corrects the posture of the paper,
The purpose is to improve transportability and image quality.

As a reference, an object of the present invention is to improve the convenience by realizing paper feeding from the outside. The present invention
It is collectively transmission line such aims to improve the appearance and reliability.

[0009]

In order to solve the problems] for the above purpose achievement, use
After the paper is conveyed to the recording unit and an image is recorded on one side,
A paper transport device that can be attached to a recording device that ejects paper
It is located above the recording device
Therefore, the paper output tray that receives the discharged paper and the above-mentioned
Conveys the paper ejected by the recording device to the paper ejection tray
A first transport path, the paper discharge tray, and the recording device
Between the recording device and the recording device.
The second transport path for transporting the paper to be printed substantially horizontally,
Located on the side of the recording device is the third transport path for transporting paper.
And a fourth part which is located below the recording device and conveys a sheet.
It has a transport path and discharges paper by the recording device.
The paper to be transported to the first transport path or the second transport
With a switching means for switching whether to convey to the route,
The sheet conveyed to the fourth conveying path is conveyed in the recording unit in the conveying direction.
Circulating means for re-feeding paper to the upstream side for circulation, and said circulating means
To the third transfer path or the fourth transfer path
Flip the repositioned paper positioned to connect
And a reversing means .

In the present invention , a positioning means for positioning the recording device with respect to the circulation means may be provided, and the recording device may be detachably attached to the recording device . The present invention is characterized in that at least the conveying path of the circulation means located below the recording device is arranged in a frame in which the recording device can be installed.

According to the present invention, in the case where the recording device ejects a recorded sheet to the upper part, the recording device is rotatably supported on the downstream side in the sheet ejection direction by the circulation means. It is characterized in that a transport path located above is provided. The present invention is characterized in that the circulation means is provided with a correction means for correcting skew of a sheet to be conveyed.

According to the present invention , there is provided a paper cassette having a paper cassette on which paper can be stacked and a paper feeding device for separating and feeding the paper one by one from the inside of the conveying path of the circulation means located below the recording device. The apparatus may be detachably arranged, and the circulation means may include a feeding means for feeding the paper fed from the paper feeding device to the upstream side in the transport direction of the recording unit.

The present invention is characterized in that a gripping portion for gripping an electric wire connected to the recording apparatus is provided. Here, the side means the front, rear, left and right sides with respect to the recording apparatus.

[0014]

According to the present invention , when an image is recorded on both sides of a sheet, the sheet having the image recorded on one side in the recording apparatus and discharged is conveyed by the circulation means and conveyed in the conveying path below the recording apparatus. It is circulated and circulated, and is reversed by the reversing means at the side of or below the recording apparatus, and then is re-fed at the upstream side in the conveyance direction of the recording unit. Therefore, the other side of the sheet is set as the recording side, and the sheet is re-fed to the recording unit to record images on both sides. In addition, the circulation means of the sheet conveying device is provided with a conveying path below the recording apparatus for re-conveying the sheet and a conveying path corresponding to the discharge position of the recording apparatus. Since it is provided on the side or below, even if the recording apparatus ejects the recorded sheet to the upper side, even if the load applied to the recording apparatus is applied, only the conveying path above it is provided.

In the present invention , at least the conveying path of the circulation means located below the recording device is arranged in the frame in which the recording device can be installed. Therefore, the recording device and the transport path are attached to the frame that is not deformed by the load, and the transport path is not deformed by the load.

In the present invention , in the case where the recording apparatus ejects a recorded sheet to the upper side, the circulation means is provided with a conveying path located above the recording apparatus, and this conveying path is the sheet discharging direction. The downstream side is rotatably supported. Therefore, even if a load is applied to the recording apparatus, only the conveying path above the recording apparatus is provided, and the upper side is opened when the recording apparatus is installed or maintained by rotating the conveying path. can do.

In the present invention , the circulation means is provided with the correction means for correcting the skew of the conveyed paper. Therefore, the posture of the sheet is corrected when it is re-conveyed to the recording unit. According to the present invention , a detachable sheet feeding device including a sheet cassette and a sheet feeding unit is disposed below the conveying path of the circulation unit located below the recording apparatus, and the sheet feeding unit is stacked in the sheet cassette and separated by the sheet feeding unit. The fed sheet may be fed to the upstream side of the recording unit of the recording apparatus in the conveyance direction by the feeding unit of the circulation unit. Therefore, it is possible to feed sheets of different sizes from the outside and record images on one side or both sides.

In the present invention , a gripping portion for gripping the electric wires connected to the recording apparatus is provided. Therefore, it is possible to hold the electric wires and the like on the side of the sheet conveying device and to collect them.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 6 are views showing a first embodiment of a sheet conveying apparatus according to the present invention and are views showing an example applied to an image recording apparatus. First, an example of the image recording apparatus to which this embodiment is attached will be described.

In FIG. 1, reference numeral 10 denotes an image recording apparatus for recording an image on one surface side of the paper P. The image recording apparatus 10 has the re-conveying device 60 of this embodiment attached as a so-called option, on the other surface side of the paper P. It is also a standard machine that can record images. This image recording device (hereinafter, simply referred to as a standard machine) 10 is configured to form an optical writing unit 12 that scans a laser beam L on a photoconductor drum 11 to form an electrostatic latent image, and a latent image on the photoconductor drum 11. An image forming means (recording section) 13 for forming an image by transferring the developed toner image onto the conveyed paper P;
Conveying means 17 that separates and feeds the paper P from the paper cassette 14 or the paper table 15 to the image forming means 13 one by one, and discharges the paper P on which the toner image is transferred to the discharge tray 16, and the paper before the discharge. The fixing means 18 fixes the toner image by heating and pressing P.

The optical writing means 12 is a polygon motor which is arranged below the photosensitive drum 11 and deflects a laser beam L emitted from a light source (not shown) by a polygon mirror 21a.
21, a plurality of optical lenses 22 for shaping the laser light L deflected by the polygon motor 21 and bending the laser light L on the photoconductor drum 11 by irradiating the laser light L onto the photosensitive drum 11 and a reflecting mirror 23. I have it.

The image forming means 13 includes a photoconductor drum 11 which rotates counterclockwise in the figure, a charging means 25 which charges the photoconductor drum 11, and a toner 26 which supplies toner 26 onto the photoconductor drum 11. Developing means 27 for forming a toner image in which the electrostatic latent image formed by 12 is visualized, and a transfer device 28 for transferring the toner image on the photoconductor drum 11 to the conveyed paper P.
And a cleaning device 29 for collecting the transferred toner remaining on the photosensitive drum 11.

The conveying means 17 rotates in the sheet feeding direction while contacting the uppermost sheet P stacked in the sheet cassette 14, and prevents the multi-feeding by the separating pad 31 in pressure contact, so that one sheet P is conveyed. Paper feed roller 32 that feeds each separately
Similarly to the paper feed roller 32, the paper feed roller 33 that separates and feeds the paper P from the paper table 15 one by one, and the nip portion abuts against the leading end of the paper P that is fed to bend the paper P. After correcting the skew, the registration roller pair 34 that conveys the sheet P by feeding in the image forming means 13 by rotating in the conveying direction in synchronization with the formation of the image, and the toner image is formed by the image forming means 13. By rotating the sheet P, whose image has been fixed by the fixing means 18 and has been conveyed, in the sheet discharge direction, from the sheet discharge port 36 opened between the exterior covers 35a and 35b of the standard machine 10 onto the sheet discharge tray 16. And a paper discharge roller pair 37 for discharging the paper, and is rotationally driven based on detection signals of the paper P by a paper sensor 38a on the front side of the registration roller pair 34, a paper sensor 38b upstream of the paper discharge roller pair 37, and the like. And carry the paper P It has become.

Note that the paper cassette 14 is provided with a spring (not shown), and an arm 14a that is biased upward in the drawing loads the paper P on the leading end side of the intermediate plate 14b (standard machine 10).
(The front side of the sheet) is pressed to press the uppermost sheet P against the sheet feeding roller 32, and the sheet table 15 is moved to the spring 15a.
The upper end of the intermediate plate 15b on which the sheets P are stacked is lifted and the uppermost sheet P is pressed against the paper feed roller 33. When the sheet cassette 14 is pulled out in the direction of arrow A in the figure, the intermediate plate 14b is automatically moved. Further, the paper table 15 can push down the intermediate plate 15b to load paper P of different sizes. Further, the paper discharge tray 16 is provided with a removable paper stopper 39 that regulates and aligns the front end of the discharged paper P, and this paper stopper 39 is indicated by an arrow B in the figure.
It can be pulled out in any direction and removed.

Further, the fixing means 18 is provided with a fixing roller 42 having a built-in heater 41 and a pressure roller 43 which is in pressure contact with the fixing roller 42 via the paper P, and is rotated by the paper in the conveying direction. P is heated and pressure-contacted, and a conveyance means
The sheet is conveyed to a pair of paper ejection rollers 37. Each of these means 12-18
Is internally supported by the exterior cover.
As shown in FIG. 2, an exterior cover 35a on the front side (right side in the figure) on the front side of the apparatus, which is the operation surface side, is rotatably supported by a rotation fulcrum 45, and a part of the discharge tray 16 is supported. The exterior cover 35b from the sheet discharge port 36 to the vicinity of the center of the upper part is rotatably supported by a rotation fulcrum 46. The exterior covers 35a and 35b are rotated so that both of them are opened to open the photosensitive drum 11 of the image forming means 13 or the developing means.
The paper P after the replacement work of 27 and the transportation path of the transportation means 17 are opened.
Maintenance work such as jam clearance processing can be performed.

In the figure, 51 is an operation panel for inputting and displaying various information, 52 is a toner remaining amount detecting sensor for detecting the presence or absence of toner 26 in the developing means 27, 53 is a power source 53a, controller board 53b and engine. A control unit 54 for controlling the drive of the respective means 12 to 17 etc. in which the electrical equipment and control parts such as the driver board 53c are housed in the case on the rear side of the device (left side in the figure).
Is an exhaust fan disposed on the side surface of the apparatus (the rear surface side in the drawing) to prevent an excessive temperature rise inside, and 55 is deformed by abutting the leading edge of the paper P fed from the paper table 15. It is a guide film that forms a path to the registration roller pair 34 by doing so.

Next, the present embodiment mounted on the standard machine 10 will be described. In FIG. 3, reference numeral 60 denotes a re-conveying device that constitutes the present embodiment, and the re-conveying device 60 has an interface connector on the connector 53d of the controller board 53b of the standard machine 10.
The host computer and external devices (not shown) are connected via 56a and its cable 56b. This re-transporter 60
The exchange of the control signal between the standard machine 10 and the standard machine 10 is performed via the connectors 10c and 60b shown in FIG.

The re-conveying device 60 discharges the paper P carried out from the paper discharge port 36 of the standard machine 10 to a paper discharge tray 63 from a paper discharge port 62 opened between the outer covers 61a and 61b. In order to guide the paper path R1 (first transport path) and the paper P carried out from the paper exit 36 of the standard machine 10 to the rear of the standard machine 10, the standard machine
10 A substantially horizontal transport path R2 (second transport path) formed between the guides 64a and 64b located above the upper discharge tray 16 and below the discharge path R1 and the paper P from the transport path R2
The reverse path R formed between the guides 65a and 65b located at the rear of the standard machine 10 for reversing and guiding substantially vertically upward.
3 (reversing means) and a guide located behind the standard machine 10 for guiding the paper P from the reversing path R3 substantially vertically downward.
The transport route R4 (the third transport path) formed between 66a and 66b.
And road), the guide 67a is located below the standard machine 10 in order to guide the distal end side of the paper cassette 14 of the standard machine 10 paper P from the conveying path R4, the conveying path of substantially horizontal formed between 67b R5 (Fourth transport route) and these routes R
1 to R5 are, for example, the conveyance route R so that they smoothly continue.
Both ends of the guides 67a and 67b forming 5 are curved.

The re-conveying device 60 is provided with the paper discharge port 36 of the standard machine 10.
The switching claw 68, which rotates the discharge direction of the paper P discharged from the sheet P about the rotation fulcrum 68a, is formed by the discharge path R1 or the conveyance path R2.
In the paper discharge path R1, the paper discharge roller pair 71 rotates in the paper discharge direction to discharge the paper P from the paper discharge port 62 to the paper discharge tray 63, and In the transport paths R2, R4, and R5, the pair of transport rollers 72 to 78 rotate in the transport direction to guide (transport) the sheet P from the sheet discharge port 62 to above, behind, and below the standard machine 10 and front side of the standard machine 10. Then, the sheet is re-fed and circulated through the conveying path on the front side of the registration roller pair 34 via the conveying path R6 formed on the leading end side of the sheet cassette 14 on the side. At this time, the reversing rollers 79 rotate clockwise in the figure, so that the driven rollers 80a, 80 press the paper P guided along the transport path R2 to symmetrical positions.
It is nipped with b and guided to the reversing path R3 and driven roller 80
The rear end side of the sheet P is conveyed to the position where the rear end side of the sheet P is clamped, and then the rear end side of the sheet P is conveyed as the front end side by so-called switchback. The sheet P is inverted and guided into the conveyance path R4 so that an image is formed on the back surface side (other surface side) of the sheet P on which the sheet is formed. That is, the conveying paths R2, R4, R5 and the conveying roller pairs 72 to 78 constitute the circulation means, and the reversing path R3 and the reversing roller 79 and the driven rollers 80a and 80b constitute the reversing means.

The transport path R6 of the paper cassette 14 is
Although not shown in detail, it is possible to smoothly re-feed the paper P sent from the carrying path R5 to the registration roller pair 34 located upstream of the image forming means 13 in the standard machine 10 in the carrying direction. The sheet cassette (14) has guides that open toward the front end side and that face at least the front and rear sides of the standard machine (10). Reference numeral 81 is a guide film that forms a continuous path when the leading edge of the sheet P conveyed from the conveyance path R2 to the reversal path R3 or from the reversal path R3 to the conveyance path R4 is abutted and deformed.

Further, as shown in FIG. 4, the conveying paths R2 to R5 can be opened by rotating one side of the guide, and a sheet sensor (not shown) appropriately arranged for each of them. Thus, the occurrence of a jam is detected, a warning is displayed on the operation panel 51, and the paper P can be easily removed when the driving is stopped. The conveyance path R2 is an exterior cover rotatably supported around a rotation fulcrum 82 that coincides with the center of the reversing roller 79.
By rotating 61a and 61b, the guide 64b side can be rotated upward to open, and the guide 64a side can also be separately rotated upward to open the upper side of the standard machine 10. Has become. Similarly, the conveyance paths R4 and R5 can also be opened by rotating the guides 66b and 67a side around the rotation fulcrums 83 and 84 at positions (doorways) close to each other. Here, since the conveyance route R5 is located below the standard machine 10, the guides 67a and 67b and the conveyance roller pairs 75 to 78 are provided in a frame 85 having a strength capable of mounting the standard machine 10.
Etc. are arranged in the unit 86, and when they are opened, they are pulled out from the frame 85 and then the guide 67a side is rotated. The paper discharge path R1 is the paper discharge port 36 of the standard machine 10.
Since the distance from is short, even if a jam occurs on the discharged paper P, it can be easily removed, and the reversing path R
Since a pair of rollers for nipping and conveying the sheet P is not provided in the sheet 3, the sheet P is not jammed and is not jammed as it is generated.

As shown in FIG. 5, the conveyance of the sheet P on the routes R1 to R5 is performed by a drive system which is divided into substantially routes, and the routes R1 to R3 are driven forward and backward. The driving force of the driving motor 91 drives one of the pair of conveying rollers 71 to 73 and the reversing roller 79.
Is rotated at the time of reversing / re-conveying the sheet P and at the time of discharging the sheet, and in the paths R4 and R5, one driving roller of the pair of conveying rollers 74 to 77 is rotated at the time of re-conveying the sheet P by the driving force of the drive motor 92. In the route R5, one driving roller of the conveying roller pair 78 is rotated by the driving force of the driving motor 93 when the sheet P is re-conveyed and when the sheet P is conveyed (paper feeding) from the sheet feeding device 100 described later. . The driving force of the motor 91 is the pulleys 72a, 73a, 79a, 79 integrally formed with the pair of conveying rollers 72, 73 and the reversing roller 79, respectively.
b, belts 94a and 94b are wound around and transmitted together with an output shaft pulley 91a, and a transmission gear in which a belt 94b is wound around a transmission gear 71a formed integrally with the conveying roller pair 71.
95b is meshed and transmitted. Further, the driving force of the motor 92 is transmitted by meshing the transmission gear 74a of the output shaft with the transmission gear 74a integrated with the conveying roller pair 74, and the transmission gear 75a integrated with the transmission roller 74 together with the transmission gear 74a. Belt 94c
The transmission gear 95c is wound around and is transmitted, and the transmission roller pair 76, 77 is integrated with the pulleys 76a, 77a.
A belt 94d is wound around and transmitted with 75a. Further, the driving force of the motor 93 is transmitted by the transmission gear 78a, which is integral with the conveying roller pair 78, wound around the belt 94e together with the pulley 93a of the output shaft. A transmission gear 95c meshing with the transmission gear 75a of the conveying roller pair 75 is rotatably supported on one end side with the center of the conveying roller pair 74 as a fulcrum of rotation, and is attached to the front (rightward in the figure) by a spring 96. Biased lever
It is rotatably installed on the other end side of 97 and has a transport path R5.
When the unit 86 is inserted into the frame 85 after the opening, the driving force of the motor 92 is transmitted to the transmission gear 75a by pressure contact with the transmission gear 75a at a predetermined pressure or more to maintain the axial distance. In the figure, reference numeral 98 denotes a plurality of rollers for regulating the driving positions (paths) of the belts 94b and 94d and applying a tension of a predetermined value or more so that the driving force can be transmitted.

The motor 92 is driven at a timing for correcting the skew of the sheet P, like the registration roller pair 34, when the inverted sheet P is nipped by the conveying roller pair 74. The leading edge of P is brought into contact with the nip portion of the transport roller pair 74 and slightly bent to correct the skew, and then the sheet is driven to start the transport of the sheet P.
That is, the correcting means is constituted by the pair of conveying rollers 74. In addition, the correction of the skew of the paper P is performed by other methods such as
It may be constituted by a pair of conveying rollers 78. In this embodiment, since the motors 91 to 93 are provided for each path, the drive control can be performed independently of each other, and the sheet P can be skewed at any position. Can be corrected.

By the way, the re-conveying device 60 has a structure shown in FIG.
As shown in (b), positioning guides 60a and 60c formed in a predetermined shape and position corresponding to the positioning holes 10a and 10b provided on the lower surface of the standard machine 10 are provided. When the machine 10 is installed on the frame 85, a clamp part (grasping part) 85a for gripping a cable (transmission line) 99 connecting the controller board 53b and an external device (not shown) is formed on the frame 85. . Then, in order to attach the re-conveyor 60 to the standard machine 10, as shown in FIG.
As shown in FIGS. 6A to 6C, first, the paper stopper 39 and the paper cassette 14 are removed from the standard machine 10 and the outer covers 61a and 61b of the re-conveying device 60 are rotated about the rotation fulcrum 82. After opening the upper side of the frame 85, the standard machine 10 is placed on the frame 85 so that the positioning guides 60a and 60c are aligned with the positioning holes 10a and 10b, and the cable 99 is gripped by the clamp portion 85a. I will put together with the standard machine 10. After that, the outer covers 61a and 61b are rotated in the opposite directions to align the transport path R2 (paper discharge path R1) with the discharge port 36 of the standard machine 10, and then the paper cassette 14 is returned to the standard machine 10 and the rear end thereof is returned. The portion 14c (shown in FIG. 1) is housed in the case 57 and the paper stopper 39 is attached to the exterior cover 61b, and the installation work is completed. That is, the re-conveying device 60 uses the positioning guides 60a and 60c as positioning means.
Is provided so that the standard machine 10 can be positioned and removed, and the connectors 10c and 60b can be easily and surely engaged while being guided by the positioning guides 60a and 60c, resulting in problems such as damage to pins of the connector. Can also be prevented (this positioning and the relationship of connectors are common between the standard machine 10 and the re-conveying device 60 and between the re-conveying device 60 and the sheet feeding device 100). Further, by rotating the outer covers 61a and 61b of the re-conveying device 60, the outer cover 35b of the standard machine 10 is allowed to rotate, so that the maintenance work can be facilitated. Further, the paper cassette 14 is housed in the case 57, and the cable 99 is configured to be compact by being held by the clamp portion 85a so as to be compact, so that the cable 99 is not caught or rubbed and damaged. . Needless to say, the positioning guides 10a and 10c arranged on the frame 85 may be guide holes into which the protrusions (feet) on the lower surface of the standard machine 10 fit.

Further, the re-conveying device 60 includes a frame 85.
The paper feed mechanism of the conveyance means 17 included in the standard machine 10 on the lower surface side of the paper cassette 114, the separation pad 131,
Paper feeding means consisting of a paper feeding roller 132 and a conveying roller pair 178
110 is configured so that it can be positioned and attached by a positioning hole and a positioning guide (not shown), and the paper feeding device 100 is connected to the control component group 58 by a cable (not shown). Thus, the paper P having a size different from that of the paper cassette 14 and the paper table 15 can be fed to the standard machine 10. And the re-transporter 60
The frame 85 and the unit 86 are provided with a conveyance route R7 formed by guides 101a and 101a, which is substantially similar to the conveyance route R6 of the paper cassette 14, and is fed from the paper feeding device 100 via the conveyance route R7. The sheet P is conveyed by the conveying roller pair 78 to the conveying path on the front side of the registration roller pair 34 via the conveying path R6. That is, the sheet feeding device 100 constitutes a sheet feeding device including the sheet cassette 114 and the sheet feeding means 110 disposed below the transporting path R5 located below the standard machine 10, and the transporting roller pair 78 of the re-transporting device 60 is configured. Constitutes a feeding means for feeding the paper P fed from the paper feeding device 100. In addition, this paper feeding device 100,
Not only can the sheet be attached to the re-conveying device 60, but the sheet P can be fed by attaching it to the lower surface of the standard machine 10 through the positioning holes 10a and 10b. Further, when the sheet P shorter than the distance between the pair of conveying rollers 78 and 178 is fed and conveyed, it can be dealt with by, for example, assembling a pinch roller near the entrance of the conveying route R6.

In the present embodiment as well, in order to form images on both sides of the sheet P, the sheet P is reversed after the first side during the re-conveyance, the image is recorded on the other side, and the sheet is discharged. However, it is necessary to perform control for aligning the page order, and this may be performed by known control, so it will not be described in detail here. For example, image information for a plurality of pages for image recording is stored in a storage unit (not shown). The order of image information to be transferred may be reversed on the front and back of the paper P.

As described above, in this embodiment, when images are recorded on both sides of the sheet P, the sheet P which is image-recorded on one side and discharged from the sheet discharge port 36 of the standard machine 10 is conveyed by the conveying means 17. The pair of rollers 72 to 78 conveys and circulates the inside of the conveying paths R2 to R5 located above, behind and below the standard machine 10 and guides them into the reversing path R3 by the reversing rollers 79 between the conveying paths R2 and R4. After being scraped off, the rear end side is switched back (reversed) with the front end as the front end and is re-conveyed to the conveyance path on the front side of the registration roller pair 34 of the standard machine 10, so that the image of the paper P is recorded on the other side and the both sides are printed. An image is formed, and thereafter, the carry-out direction is switched by the switching claw 68, and the pair of paper discharge rollers 71
As a result, the sheet is conveyed in the sheet discharge path R1 and discharged from the sheet discharge port 62 onto the sheet discharge tray 63. Inversion route R3 of this conveying means 17
And the reversing roller 79 is arranged at the rear (side) of the standard machine 10, and the load applied to the standard machine 10 is located on the route R1 located above,
Exterior cover that supports only the R2 side and supports them
Since one ends of 61a and 61b are supported by the rotation fulcrum 82, the load applied to the standard machine 10 is small and the transport path in the standard machine 10 is not distorted. Therefore, the standard machine 10
No need to reinforce, and the reversing means for reversing the paper P from the standard machine 10 can be omitted. As a result, the standard machine
The 10 transportation paths can be simplified and the cost can be reduced.

Further, when the sheet P is conveyed by the pair of conveying rollers 74, the sheet P is conveyed after the leading end thereof is brought into contact with the nip portion and straightening is performed, so that the posture of the sheet P is corrected. Then, it is re-transported to the standard machine 10. Therefore, the transportability of the paper P is improved, and a high-quality image is formed on the other side of the paper P. Further, the exterior covers 61a and 61b that support the paper discharge route R1 and the transport route R2 are pivot points.
The transport route R1 to R5 is rotatably supported by 82, and the transport routes R1 to R5 are not provided on the front side of the standard machine 10. The transport route R5 is a drawable unit 86 in a frame 85 on which the standard machine 10 can be mounted. Since the frame 85 is provided with positioning guides 60a and 60c for positioning the standard machine 10, the transport route R5 is not deformed by the load of the standard machine 10, The installation accuracy is also improved and the transportability of the paper P is improved. Further, this re-conveying device 60 can be easily and quickly attached to and detached from the standard machine 10, and when double-sided recording is not necessary, it can be omitted to reduce the cost of the recording device alone. Further, the maintenance work of the standard machine 10 can be easily performed by rotating the exterior covers 61a and 61b, and the transport route R
One of the guides 1 to R5 can be opened by rotating one of the guides, and the operability when removing the jammed paper P is improved.

The paper cassette 14 of the standard machine 10 is shown in FIG.
Even if it is long, the rear end portion 14c is housed in a case 57 that houses the control component group 58, and the cable 99 connected to the standard machine 10 is clamped by the clamp portion 85a. Since they can be put together in a space, they are compact and have an excellent appearance, and it is possible to prevent the cable 99 from being caught or rubbed and damaged, thereby improving reliability.

Further, the paper feeding device 100 can be attached / detached under the frame 85 as needed, and the paper P is conveyed from the paper cassette 114 to the conveyance path on the front side of the registration roller pair 34 of the standard machine 10. Therefore, it is possible to increase the paper feed amount of the paper P to reduce complicated operations such as replenishment and replacement of the paper P, and feed paper P of different sizes in accordance with a recording image to one side or both sides. Images can be recorded and convenience can be improved.

Next, FIGS. 7 and 8 are views showing a second embodiment of the sheet conveying apparatus according to the present invention. Since this embodiment is constructed in substantially the same manner as the above-mentioned embodiment, the same construction is provided. Are denoted by the same reference numerals and description thereof will be omitted. 7 and 8, reference numeral 260 denotes a re-conveying device that constitutes the present embodiment, and the re-conveying device 260 includes the paper discharge path R1 and the conveyance path R.
The sheet P, which is provided with 2, R4 and R5, is conveyed through the conveyance paths R4 and R5 as it is without being reversed after being conveyed through the conveyance path R2 after being conveyed from the discharge port 36 of the standard machine 10. Instead of the reversing roller 79 and the reversing path R3 of the above-described embodiment on the exit side of the conveying path R5, the conveying path R5
Reversing roller that reverses the paper P from the bottom and pulls it below
279 and an inversion path R23 formed by a guide 265 located below the transport path R5 are provided in a unit 86 that can be pulled out from the frame 85.

The reversing roller 279 is nipped between the driven rollers 280a and 280b which presses the paper P guided by rotating clockwise in the drawing in symmetrical positions, and guides it to the reversing path R23 to be driven. The paper P is reversed by a switchback in which the rear end side of the paper P is conveyed as the front end side by rotating counterclockwise after being fed to a position where the rear end side is nipped with the roller 280b, and then conveyed. It is designed to send to roller pair 78. That is, the reversing roller 279, the driven rollers 280a and 280b, and the reversing path R23 constitute a reversing means.

Therefore, between the conveying roller pairs 73 and 74,
Pulleys 273a, 273 formed integrally with one of the driving rollers
A belt 91a of the motor 91 and pulleys 72a and 73a of the pair of conveying rollers 72 and 73 are wound around belts 94a and 94b, and are rotated by the driving force of the motor 91.
3, the reversing roller 279 rotates forward / reversely as the pulley 93a of the motor 93 and the pulley 78a of the conveying roller pair 78 are wound around the belt 94e so that the driving force of the motor 93 is transmitted. It is supposed to do. Therefore, in this embodiment, the motor 93 is driven forward and backward.

In the figure, reference numeral 281 is a continuous path when the leading edge of the sheet P conveyed from the conveying path R5 to the reversing path R23 or from the reversing path R23 to the conveying path of the standard machine 10 is abutted and deformed. It is a guide film for forming. Thus, in this embodiment, the transport routes R2, R4,
R5 and reversing roller R27 and reversing roller 27
Since 9 is arranged in the lower part, it is possible to obtain the same effect as that of the above-mentioned embodiment.

In the first and second embodiments described above, an example in which the invention is applied to the image recording apparatus 10 that discharges the paper P from the paper discharge port 36 on the front side to the upper discharge tray 16 is described. The present invention can also be applied to a recording apparatus that ejects the paper P from a paper ejection port provided on the rear (side) side or the rear surface (side), and in this case, the upper conveyance path R2 can be omitted. Further, only the case where the paper P is re-conveyed has been described, but the image is recorded on one surface side without being re-conveyed, and then the paper discharge tray.
It goes without saying that the paper can be discharged onto the 63.

[0046]

According to the present invention, even if a load is applied to the recording apparatus, the weight of only a part of the conveying path is added to the upper portion, so that the conveying path in the recording apparatus is distorted. There is no need to reinforce. Also,
Since the sheet is reversed outside the recording device, the reversing means can be omitted from the recording device. Therefore, the transport path of the recording apparatus can be simplified, and the cost can be reduced.

According to the present invention, when the recording device is positioned,
It may be easily detachable, and one-sided recording or two-sided recording can be selected as necessary, and the sheet conveying device can be omitted if not necessary. Therefore, the cost of the recording device can be reduced. According to the present invention, since the recording device is installed in the frame having sufficient strength and the conveying path is internally provided, the assembling accuracy of the recording device and the conveying path can be maintained and improved, and the conveying property is improved.

According to the present invention, since the conveying path located above the recording device rotatably supports the downstream side of the paper in the paper discharge direction, the upper part can be opened during installation or maintenance of the recording device. it can. Therefore, the operability is improved. Starting
According to Ming, since the skew of the sheet to be re-conveyed is corrected, the sheet with the corrected posture can be fed to the recording unit. Therefore, the transportability is improved and the quality of the recorded image is improved. According to the present invention, a detachable sheet feeding device may be provided and the sheets to be separated and fed from within the sheet cassette may be fed to the upstream side of the recording unit of the recording apparatus in the conveying direction. Paper can be fed from the outside to record an image. Therefore, the number of sheets that can be fed can be increased, and the sheets to be conveyed can be switched according to the recorded image, which improves convenience.

According to the present invention, since the electric wires connected to the recording apparatus can be grasped, the electric wires can be put together on the side of the sheet conveying apparatus, and the damage due to being caught or rubbing can be prevented. Therefore, it is intended to improve the appearance and reliability.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an image recording apparatus to which a first exemplary embodiment of a sheet conveying apparatus according to the present invention is applied, and is an overall configuration diagram thereof.

FIG. 2 is an explanatory diagram illustrating maintenance work of the image recording apparatus.

FIG. 3 is an overall configuration diagram showing a state in which the image recording apparatus of the first embodiment is installed.

FIG. 4 is an explanatory diagram illustrating opening of a transport path according to the first embodiment.

FIG. 5 is a system diagram illustrating a drive system of the first embodiment.

FIG. 6 is an explanatory diagram illustrating installation of the image recording apparatus in the first embodiment.

FIG. 7 is a diagram showing a second embodiment of the sheet conveying device according to the invention, and is an overall configuration diagram thereof.

FIG. 8 is a system diagram illustrating a drive system of a second embodiment.

[Explanation of symbols]

10 Standard machine (recording apparatus) 10a, 10b Positioning hole 12 Optical writing means 13 Image forming means (recording section) 14, 114 Paper cassette 15 Paper table 16 Paper ejection tray 17 Conveying means 18 Fixing means 35, 35a, 35b Exterior cover 36 Paper ejection port 39 Paper stopper 51 Operation panel 60 Re-conveying device (paper conveying device) 60a, 60c Positioning guide (positioning means) 61, 61a, 61b Exterior cover 62 Paper ejection port 63 Paper ejection trays 64a, 64b to 67a, 67b, 101a, 101b, 265 Guide 68 Switching claw 71 Paper discharging roller pair 72, 73, 75 to 77, 273 Conveying roller pair (circulating means) 74 Conveying roller pair (circulating means, correction means) 78 Conveying roller pair (circulating means, feeding means) Sending means) 79,279 Reversing rollers (reversing means) 80a, 80b, 280a, 280b Driven rollers (reversing means) 82-84 Rotation fulcrum 85 Frame 85a Clamping part (grasping part) 86 Unit 91-93 Motor 94a-94e Transmission Belt 95b, 95c Transmission gear 96 spring 97 the lever 99 cable (transmission line) 100 paper feeding device 110 the sheet feeding means P Paper R1 sheet discharging path (second transport path constituting a circulating means) (first transport path constituting a circulating means) R2 transport path R4 Transport route (third transport route constituting circulation means) R5 transport route (fourth transport route constituting circulation means) R3, R23 Inversion route (inversion means) R6, R7 transport route

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-28677 (JP, A) JP-A-4-39274 (JP, A) JP-A-6-312549 (JP, A) Actual Kaihei 4- 31150 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65H 85/00 B65H 29/58

Claims (5)

(57) [Claims] 1. A sheet of paper is conveyed to a recording unit and an image is recorded on one side.
Attached to a recording device that ejects the paper after recording
A sheet conveying device, which is located above the recording device and ejected by the recording device.
An output tray for receiving the paper to be printed and a paper output tray for the paper output by the recording device.
A first transport path for transporting to a sheet, the discharge tray, and the recording
The recording device is positioned in a substantially horizontal state between the recording device and the recording device.
A second transport path for transporting the discharged paper substantially horizontally,
A third transport for transporting a sheet located on the side of the recording device
Conveys the paper on the path and below the recording device.
And a fourth transport path that
Whether the sheet to be discharged is conveyed to the first conveyance path
2 has a switching means for switching between transporting to the transport route
The paper conveyed to the fourth conveyance path to the recording unit.
A circulation means for re-feeding and circulating the upstream side in the conveyance direction, and the third conveyance path or the third conveyance path forming the circulation means.
4 Paper to be re-fed so as to be connected to the transport path
And a reversing means for reversing the sheet. 2. The sheet carrying device is provided in the fourth carrying path.
The third transfer path is moved in a direction parallel to the surface to be installed.
The sheet conveying apparatus according to claim 1, wherein the sheet conveying apparatus is separable from the sheet conveying apparatus. 3. The second transport path is separated from the recording device.
Is rotatably supported on the side of the third transport path so that
The sheet conveying apparatus according to claim 1 or 2, wherein 4. The third conveyance path is a skewed sheet to be conveyed.
With a straightening means for straightening the line, this straightening means comprises a pair of straightening means.
The sheet conveying device according to claim 1, wherein the sheet conveying device is constituted by a roller . 5. A wire for connecting to the recording device is gripped.
The sheet conveying device according to claim 1 , further comprising a grip portion .