JP5087700B2 - Paper feeding device and image forming system - Google Patents

Description

The present invention relates to a sheet feeding apparatus and an image forming system Ru is attached to the image forming apparatus such as a printer or a copying machine.

  Mass feeding devices that can store a large amount of paper and are supplied to a printing machine, a copier, or the like and supply the paper are well known. For example, Patent Document 1 and Patent Document 2 include a mass feeding device and the same. A mounted copier is disclosed.

  Conventionally, in a printing machine or a high-speed copying machine, in order to enable high-speed and large-volume printing and copying / printing, a large-capacity paper feeding unit is provided inside the printing machine or copying machine or the like. A paper feed table was installed at the bottom of the screen. Therefore, the total height of the apparatus is inevitably increased.

  In the case of an electrophotographic image forming apparatus, a fixing device for fixing unfixed toner is provided. However, in the case of a high-speed machine, the number of fixings per unit time is large. And a fixing device having a large diameter increases the size of the fixing device. Furthermore, a large-capacity toner bottle must be accommodated in the apparatus, and in particular in the case of a full-color apparatus, a three-color or four-color toner bottle is necessary, and the total height of the apparatus must be further increased. .

  Usually, a printing machine or a copier has a document reading device, and an automatic document feeder (ADF) is often mounted on the document reading device.

  However, as described above, the overall height of large and high-speed printers and copiers is large, and the operability of the document reading device or ADF placed at the top of the device is reduced, or in the case of a large machine, the document reading In some cases, it may be difficult to install the device or the ADF. A large-volume paper feeding device is mounted on an image forming apparatus such as a printing machine or a copier. Conventionally, it merely supplies paper, which improves the operability of the image forming apparatus or the image forming system. It did not contribute.

  Also, many copiers and the like are provided with a manual paper feed unit on the side of the apparatus as shown in FIG. When a mass feeding device is mounted on such an image forming apparatus, as shown in FIG. 1 of Patent Document 2, in order to avoid a manual tray that protrudes from the apparatus side surface or is pulled out from the apparatus side surface, A wasteful space is generated in the paper device, and the entire width of the mass feeding device is increased, and the height of the mass feeding device is restricted by a manual feed tray, thereby limiting the amount of paper loaded.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems and to provide a paper feeding device and an image forming system that are excellent in operability and paper loading efficiency at a low cost.

According to the present invention, there is provided a paper feeding device that does not have an image forming unit and is connected to the image forming device, and the image reading device and the manual paper feeding device can be selectively attached to and detached from the same mounting portion. The mounting portion is solved by being positioned above the transport port that receives the sheet-like paper transported from the manual sheet feeding device when the manual sheet feeding device is mounted .

Further, it is preferable that the image reading device is mounted via an auxiliary frame, and the manual sheet feeding device is mounted without using the auxiliary frame .

Further, it is preferable that a transport path for receiving sheet-like paper transported from the manual paper feed device is detachably provided when the manual paper feed device is mounted .

In addition, according to the present invention, the above problem is solved by an image forming system comprising an image forming apparatus and the paper feeding device according to any one of claims 1 to 3 connected to the image forming apparatus. Is done.

Further, it is preferable that a plurality of the paper feeding devices are connected.
Further, it is preferable that the image reading device is mounted on a main body frame of one of the plurality of connected paper feeding devices.

  Further, it is preferable that the main body frame is mounted with the image reading device via a removable auxiliary frame.

Further, it is preferable that another one of the plurality of connected sheet feeding apparatuses does not include the auxiliary frame .
Further, it is preferable that the other one of the plurality of connected sheet feeding apparatuses has the manual sheet feeding apparatus mounted on the main body frame .

According to the paper feeding device and the image forming system of the present invention , it is possible to realize both excellent operability and high functionality as an image forming system by suppressing the overall height of the image forming device.

In addition, a function according to the user's needs can be mounted on the sheet feeding device and connected to the image forming apparatus, and an image forming system having various configurations can be realized at low cost. In addition, function expansion is easy. Further, it shared a configuration of the main body portion also in the sheet feeding device you mount additional devices of different functions, it is possible to reduce the cost of the paper feeder.

1 is a configuration diagram illustrating an example of an image forming system according to the present invention. 1 is a cross-sectional view illustrating an internal configuration of a printer device of an image forming system. It is sectional drawing which shows schematic structure of a 1st paper feeder. It is an exploded view of a 1st paper feeder. FIG. 4 is a partial side view of the upper part of the first sheet feeding device as viewed from the right direction in FIG. 3. FIG. 6 is an exploded view of FIG. 5. It is sectional drawing which shows schematic structure of a 2nd paper feeder. It is a front view which shows a mode that the 1st paper feeder and the 2nd paper feeder were connected. It is sectional drawing which shows another example of a 1st paper feeder. It is sectional drawing which shows another example of a 2nd sheet feeder. It is sectional drawing which shows another example of the 2nd sheet feeder. It is sectional drawing which shows another example of the 1st sheet feeder. FIG. 6 is an enlarged view showing in detail a sheet conveyance path at a connection portion between a first sheet feeding device and a second sheet feeding device. It is sectional drawing which shows another example of the 2nd sheet feeder. It is sectional drawing which shows another example of the 1st sheet feeder. It is a block diagram showing a system example in which a second paper feeding device is connected to a printer device. It is the top view and front view which show the roller separation mechanism with which a conveyance roller pair is provided. It is a schematic diagram for demonstrating the problem in the mass supply apparatus of a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram showing an example of an image forming system according to the present invention. As shown in this figure, the image forming system of this example includes a printer apparatus 10 as an image forming apparatus, and first and second sheet feeding apparatuses 40 and 50 that are mass feeding apparatuses.

First, the printer apparatus 10 will be described with reference to FIGS.
The printer device 10 is a full-color printer that uses toner of four colors of yellow (Y), cyan (C), magenta (M), and black (K), and as shown in detail in FIG. In addition, four image forming units 1Y, 1M, 1C, and 1K that perform image formation with respective color toners are arranged side by side. Since the configuration and operation of each of the image forming units 1Y, 1M, 1C, and 1K are substantially the same, the image forming units will be described by omitting the symbols (Y, M, C, and K) that indicate colors. . In the image forming unit 1, a charger 3, a developing device 4, a cleaning device 5, and the like are disposed around a photosensitive drum 2 as an image carrier. An exposure means 7 is disposed above the photosensitive drum 2.

  Below the four image forming units 1Y, 1M, 1C, and 1K, an intermediate transfer belt 8 wound around a plurality of support rollers is disposed. The intermediate transfer belt 8 is driven to run in the direction of arrow A when one of the support rollers is rotationally driven by a driving means (not shown). A transfer roller 6 serving as a primary transfer unit is disposed so as to face the photosensitive drum 2 of each image forming unit with the intermediate transfer belt 8 interposed therebetween.

  In each image forming unit 1, the photosensitive drum 2 is rotationally driven counterclockwise in the drawing, and the surface of the photosensitive member is uniformly charged to a predetermined polarity by the charger 3. Next, the charged surface is irradiated with a light-modulated laser beam emitted from the exposure means 7, whereby an electrostatic latent image is formed on the photosensitive drum 2. The electrostatic latent image is developed with toner applied from the developing device 4 and visualized as a toner image. The yellow, cyan, magenta, and black color toner images formed by the image forming units are sequentially superimposed on the intermediate transfer belt 8 and transferred.

  On the other hand, a sheet feeding unit 14 having sheet feeding trays 14 a and 14 b is provided at the lower part of the apparatus main body, and the first and second sheet feeding devices 40 and 50 mounted on the sheet feeding unit 14 or the printer device 10. For example, transfer paper is fed as a recording medium. The fed transfer paper is conveyed toward the registration roller 11 as indicated by an arrow B.

  The transfer paper that has been stopped by being abutted against the registration roller 11 is sent from the registration roller 11 in time with the toner image on the intermediate transfer belt 8, and the secondary transfer roller 9 and the intermediate transfer belt 8 come into contact with each other. It is sent to the secondary transfer section. A voltage having a polarity opposite to the charging polarity of the toner is applied to the secondary transfer roller 9, whereby the superimposed toner image (full color image) on the intermediate transfer belt 8 is transferred onto the transfer paper. The transfer paper after transfer of the toner image is conveyed to the fixing device 13 by the conveyance belt 12, and the toner is fixed to the transfer paper by heat and pressure in the fixing device 13. The transfer sheet after the toner image is fixed is discharged out of the apparatus as indicated by an arrow C, and is discharged onto a discharge tray (not shown).

  In the case of single-sided printing, when the paper is discharged from the back side (face-down paper discharge), the paper is reversed outside by being discharged through the paper reversing unit 15 as indicated by an arrow C. In the case of double-sided printing, the fixed sheet is re-fed to the registration roller 11 through the re-feeding path 17 through the double-side reversing unit 16, and the toner image is transferred from the intermediate transfer belt 8 to the back side of the sheet. The paper after the toner image transfer is fixed by the fixing device 13, and as indicated by an arrow C from the fixing device 13 as in the case of single-sided printing, or after passing through the paper reversing unit 15, as shown by an arrow C. The paper is discharged and discharged onto a paper discharge tray (not shown). Switching claws 18 and 19 for switching the paper transport direction are appropriately arranged.

  In the case of monochrome printing, the printer apparatus 10 of this example forms a toner image using only the black (K) image forming unit 1K, and transfers the toner image onto the transfer paper via the intermediate transfer belt 8. . The handling of the paper after fixing the toner image is the same as in the case of full-color printing.

As shown in FIG. 1, a toner bottle setting unit 20 for setting each color toner bottle 21 storing toner to be supplied to the developing device 4 of each image forming unit is provided on the upper surface of the apparatus main body. An operation unit 24 having a display unit 22 and an operation panel 23 is also provided on the upper surface of the apparatus main body. Further, on the right side surface in the drawing of the apparatus main body, a paper carry-in portion D from the large-volume paper feeding device (the first paper feeding device 40 in the image forming system shown in FIG. 1) is provided. In the sheet carry-in section D, a open hole for receiving a sheet, the conveying means to convey the sheet is provided.

Next, the first paper feeding device 40 that is a mass paper feeding device will be described.
FIG. 3 is a cross-sectional view illustrating a schematic configuration of the first paper feeding device 40. As shown in this figure, the first paper feed device 40 includes two stages of paper feed trays 41 and 42, and for example, transfer paper P is stored in the paper feed trays 41 and 42 as a recording medium. . Paper feeding means 43 and 43 for feeding transfer paper from the paper feeding trays 41 and 42 are provided, and the transfer paper from the paper feeding trays 41 and 42 passes through the paper transport path 44 and is supplied to the first paper supply path. The paper is delivered from the carry-out part E1 of the paper device 40 to the paper carry-in part D of the printer device 10.

  The first paper feeding device 40 includes a paper feeding path (first paper feeding path) 44 that collects the paper from the paper feeding trays 41 and 42 in one place and sends the paper to the printer device 10, as well as the second paper feeding. When the apparatus 50 is connected, a relay conveyance path (second paper conveyance path) 45 and a relay conveyance path 45 that can relay the sheet from the second sheet feeding device 50 and join the first sheet conveyance path 44 are provided. A vertical conveyance path (third paper conveyance path) 46 that merges with the first paper conveyance path 44 is provided. In each paper transport path 44, 45, 46, a transport roller pair 47 as a paper transport means is appropriately arranged. However, in order to avoid the complexity of the drawing, one transport roller pair 47 in the paper transport path 44 is excluded. The reference numerals of the conveying roller pairs are not shown. In this example, each paper transport path 44, 45, 46 is provided as a unit. A part 45a of the relay conveyance path 45 is configured to be able to be pulled out in the front direction of the apparatus (the direction perpendicular to the drawing and upward), and the jam handling property at the part is improved. In addition, you may comprise so that the whole relay conveyance path 45 can be pulled out.

  The upstream end of the relay conveyance path 45 is configured as a paper carry-in part E2. The paper carry-out part E1 and the paper carry-in part E2 are provided at the same height, and the height is the same as that of the paper carry-in part D of the printer device 10.

  An image reading device 60 is disposed above the first paper feeding device 40, and an automatic document feeder (ADF) 70 is disposed on the image reading device 60. The image data of the document read by the image reading device 60 is transmitted from the first paper feeding device 40 electrically connected by a connector (not shown) to the printer device 10. Since the configurations and operations of the image reading device 60 and the ADF 70 are the same as those conventionally known, descriptions of portions that are not the gist of the present invention are omitted. Note that the image reading device 60 and the ADF 70 can be used for existing image reading devices and automatic document feeders.

4 is an exploded view of the first paper feeder 40, FIG. 5 is a partial side view of the upper portion of the first paper feeder 40 as viewed from the right in FIG. 3, and FIG. 6 is an exploded view of FIG. It is.
As shown in these drawings, the first paper feeding device 40 of this example is configured such that the image reading device 60 and the ADF 70 are mounted on the main body 49 via the auxiliary frame 90. The auxiliary frame 90 has image reading device holding portions 91 and 91 which are fixed plates for holding the image reading device 60 in the inner portion of the frame. The bottom surface portion of the holding portion is image reading device mounting portions 91a and 91a for mounting the image reading device 60. In addition, on the outside of the back side of the auxiliary frame 90, hinge holding portions 92 and 92 for mounting a hinge that supports the ADF 70 so as to be openable and closable with respect to the image reading device 60 are provided. The upper surfaces of the hinge holding portions 92 and 92 are hinge mounting surfaces 92a on which the hinges 72 and 72 are mounted.

  The auxiliary frame 90 is mounted on the upper portion of the first paper feeding device 40 so that the image reading device holding portions 91 and 91 of the auxiliary frame 90 are inserted into the main body frame 48 of the first paper feeding device 40. 3 and 5, the auxiliary frame 90 is fixed to the main body frame 48 with the fixing screw 30 a. Then, the image reading device 60 is mounted on the image reading device holding portions 91, 91 of the auxiliary frame 90, and the fixing portion 61 (FIG. 6) provided protruding from the bottom surface of the image reading device 60 is fixed by the fixing screw 30b. The image reading device 60 is fixed to the auxiliary frame 90 by screwing to the holding portion 91 (the mounting portion 91a). Thereby, the image reading device 60 is fixed to the main body frame 48 of the first paper feeding device 40 via the auxiliary frame 90.

  Further, the hinge 72 of the ADF 70 is screwed and fixed to the hinge mounting surface 92a of the hinge holding portion 92 on the back side of the auxiliary frame 90 with the fixing screw 30c. As a result, the ADF 70 is fixed to the main body frame 48 of the first paper feeding device 40 via the auxiliary frame 90 and supported so as to be openable and closable with respect to the image reading device 60. With this configuration, it is possible to disperse excessive weight when the ADF 70 is opened and closed in the main body frame 48, and to realize a hinge holding portion with high hardness and improve reliability.

Next, the second paper feeding device 50 that is a mass paper feeding device will be described.
The second paper feeding device 50 shown in FIG. 7 is configured by mounting a manual paper feeding device 51 on a main body 49. The main body 49 is the same as the main body 49 of the first paper feeding device 40, and redundant description is omitted. Note that the manual sheet feeder 51 can be an existing manual sheet feeder.

  In the second paper feeding device 50 shown in FIG. 7, the downstream end of the first paper transport path 44 is configured as a paper carry-out section F1, and the upstream end of the relay transport path 45 (second paper transport path) is the paper. It is comprised as the carrying-in part F2. The paper carry-out part F1 and the paper carry-in part F2 are provided at the same height, and the heights thereof are the paper carry-in part D of the printer device 10 and the paper carry-out part E1, the paper carry-in part of the first paper feed device 40. It is the same as E2.

  A sheet feeding means 53 is provided for feeding a recording medium such as transfer paper from the sheet feeding tray 52 of the manual sheet feeding device 51, and a transfer roller pair 55 is appropriately arranged for the transfer sheet from the sheet feeding tray 52. The paper passes through the paper transport path 54 and is transferred to the vertical transport path 46 of the main body 49. The transfer sheet is further delivered from the relay conveyance path 45 (the conveyance path 45b) through the first sheet conveyance path 44 to the sheet carry-in section E2 (FIG. 3) of the first sheet feeder 40 from the carry-out section F1. . Further, the transfer paper from the paper feed trays 41 and 42 included in the main body 49 of the second paper feed device 50 passes through the first paper transport path 44 and the paper carry-in portion E2 of the first paper feed device 40 from the carry-out portion F1. It is handed over to. The transfer paper from the second paper feeding device 50 delivered to the first paper feeding device 40 passes through a relay conveyance path (second paper conveyance path) 45 of the first paper feeding device 40 (first paper feeding). The paper is transferred from the carry-out portion E1 of the first paper feed device 40 to the paper carry-in portion D of the printer device 10 through the first paper conveyance path 44 (of the device 40).

  The second paper feeding device 50 also includes a relay conveyance path (second paper conveyance path) 45, and another first paper feeding device 40 or a second paper feeding device 50 is added to the second paper feeding device 50. It is configured so that it can be connected. In this case, the transfer paper from the subsequent paper feeding device is transferred from the paper carry-in portion F2 to the second paper feed device 50 from the paper carry-in portion F2.

  Since the main body 49 of the second paper feeder 50 is the same as the main body 49 of the first paper feeder 40, the order of the first paper feeder 40 and the second paper feeder 50 is changed, and the printer It is also possible to connect to the device 10. That is, the second paper feeding device 50 may be connected next to the printer device 10 and the first paper feeding device 40 may be connected next to the second paper feeding device 50.

  As described above, in the image forming system of the present embodiment, the first paper feeding device 40 and the second paper feeding device 50 that are two large-volume paper feeding devices are connected to the printer device 10 as the image forming device. Therefore, a large amount of paper can be continuously supplied, and a large amount of printing, copying and printing can be realized at high speed.

  Even if the printer apparatus 10 has a high-speed fixing device (having a fixing roller having a large diameter and a pressure roller) and a toner bottle having a large capacity, the overall height of the apparatus tends to be large. An image reading device 60 necessary for formation and an ADF 70 for automatically supplying a document at a high speed are provided on the first paper feeding device 40 side, and further, a manual paper feeding device 51 for enabling various paper feeding. Is provided in the second paper feeding device 50, the overall height of the printer device 10 is suppressed, the operability of the operation panel 23 provided on the upper surface of the device is prevented from being lowered, and the bottle replacement work to the toner bottle setting unit 20 is performed. It is possible to achieve both high functionality and excellent operability in the image forming system.

  Further, in the present embodiment, the height of the upper surface of the printer device 10 (the height of the portion that performs normal operation on the printer device), the image reading device 60 and the ADF 70 in the first paper feeding device 40 and the second paper feeding device 50, and manual feed. Since the height of the sheet feeding device 51 (the height of the portion where normal operation is performed on them) is substantially equal, the manuscript setting and removal for the image reading device 60 and the ADF 70 are performed together with the operability for the printer device 10. It is possible to provide a highly functional image forming system with excellent operability that can easily perform operations such as manuscript setting and removal operations on the manual paper feeder 51 and can perform from high-speed and large-scale printing to high-speed copying and manual printing / copying. it can.

  Incidentally, as described with reference to FIG. 4, the first paper feeding device 40 is configured to mount the image reading device 60 and the ADF 70 on the main body 49 via the auxiliary frame 90. The second paper feeding device 50 is configured to directly mount the manual paper feeding device 51 on the main body 49 instead of the auxiliary frame 90 (without using the auxiliary frame). With this configuration, a vertical difference is generated between the paper discharge tray 71 of the ADF 70 (located at substantially the same height as the contact glass surface (not shown) of the image reading device 60) and the manual paper feeder 51 (a step is provided). Even if the first paper feeding device 40 and the second paper feeding device 50 using the same main body frame 48 are installed side by side (as shown in FIG. 1), they protrude from the first paper feeding device 40 to the side. The first paper feeding device 40 and the second paper feeding device 50 can be arranged side by side without the interference between the document discharge tray 71 and the manual paper feeding device 51 to be performed.

  If the image reading device 60 and the ADF 70 are mounted directly on the upper part of the main body frame 148 without using the auxiliary frame as in the first paper feeding device 140 shown in FIG. The position of the manual sheet feeding device 51 of the second sheet feeding device 150 to be used becomes high, and as a result, the document discharge tray 71 and the manual sheet feeding device 51 interfere with each other, and the first sheet feeding device 140 and the first sheet feeding device 51 are interfered with each other. The two paper feeders 150 cannot be juxtaposed. Note that the height of the upper surface of the ADF 70 of the first paper feeder 140 is the same as that of the first paper feeder 40 of the embodiment of the present invention.

  If the first paper feed device 140 and the second paper feed device 150 are to be arranged in parallel, the first paper feed device 140 and the second paper feed device 150 have different main body frames (of different heights). Different body frames) must be used, and cost reduction due to the common use of members cannot be obtained.

  Furthermore, since the height position of the manual sheet feeder 51 in the second sheet feeder 150 is increased, the conveyance of the vertical conveyance path 46 on the main body side from the pair of the most downstream conveyance rollers of the sheet conveyance path 54 of the manual sheet feeder 51 is performed. The distance L to the roller pair increases, and a small-size sheet cannot be conveyed. Further, since the height position of the manual sheet feeding device 51 in the second sheet feeding device 150 is increased, the cost is increased due to an increase in the size of the frame and the exterior cover.

  However, in the present embodiment, the first paper feeding device 40 and the second paper feeding device 50 have the configuration in which the image reading device 60 and the ADF 70 are mounted on the main body 49 via the auxiliary frame 90 as described above. By using the same main body 49, the height of the frames 48, 48 of the main body is the same (even if the top surfaces of the frames 48, 48 of the two paper feeders installed side by side are the same). ), The interference between the paper discharge tray 71 of the first paper feeder 40 and the manual paper feeder 51 of the second paper feeder 50 is eliminated, and the first paper feeder 40 and the second paper feeder 50 can be arranged in parallel. It is said.

  In addition, by using the same main body 49 in the first paper feeding device 40 and the second paper feeding device 50, it is possible to reduce the cost by sharing the members and preventing the device from being enlarged. In addition, a plurality of large-volume paper feeders can be connected to the image forming apparatus, and a large amount of paper can be continuously supplied.

  Further, the image reading device 60 and the ADF 70 and the manual paper feeding device 51, which are components for realizing the high functions of the image forming system, are arranged above the first paper feeding device 40 and the second paper feeding device 50, respectively. Thus, for example, a dead space is not generated in the large-volume sheet feeder due to, for example, a manual feed tray, and the height of the second sheet feeder 50 is limited by the sheet discharge tray 71 of the first sheet feeder 40 as described above. Therefore, the first paper feeding device 40 and the second paper feeding device 50, which are large-volume paper feeding devices, achieve high paper loading efficiency.

  Further, in the second paper feeding device 50, the manual paper feeding device 51 is directly mounted on the main body 49 without an auxiliary frame, so that the second paper feeding device 50 is separated from the most downstream conveyance roller pair in the paper conveyance path 54 of the manual paper feeding device 51. The distance to the pair of conveying rollers in the vertical conveying path 46 on the main body side does not increase, and even a small-sized sheet can be fed from the manual sheet feeding device 51.

  Note that the first paper feeding device 40 and the second paper feeding device 50 of this example use the same main body portions 49 and 49, and the exterior cover GC is also shared as shown in FIG. Thereby, the apparatus cost is further reduced. Further, as the image reading device 60 and the ADF 70 and the manual paper feeding device 51, the existing image reading device, the ADF and the manual paper feeding device can be used, and the device cost of the mass paper feeding device can be further reduced.

Next, another example of the first paper feeding device 40 and the second paper feeding device 50 will be described with reference to FIGS. 9 and 10.
When only the first paper feeding device 40 in FIG. 3 is connected to the printer device 10 (only one first paper feeding device 40 is used as the mass paper feeding device), or a plurality of mass paper feeding devices are used. The relay transport path (second paper transport path) 45 is not necessary for the most upstream large-volume sheet feeder when connecting to the printer 10 (when the first sheet feeder 40 is connected to the most upstream side). Absent.

  Therefore, the first paper feeding device 40B shown in FIG. 9 is configured not to have the conveyance path 45a which is a part of the relay conveyance path. Except that the conveyance path 45a is not provided, it is the same as the first paper feeding device 40 in FIG. Originally, the conveyance path 45a is configured to be able to be pulled out in the front direction of the apparatus (the direction perpendicular to the drawing and upward) as described above. Therefore, it is extremely easy to omit the conveyance path 45a.

  In the first sheet feeding device 40B of this example, the conveyance path 45a which is a part of the relay conveyance path is omitted, so that the apparatus configuration is simplified and the apparatus cost can be reduced. Even in such a case, when only one first sheet feeding device 40B is used as the large volume sheet feeding device, or when the first sheet feeding device 40B is connected to the most upstream side even when a plurality of large volume sheet feeding devices are used. Can provide a function that is not different from that of the first paper feeding device 40 of FIG.

  Since the image reading device 60 and the ADF 70 included in the first paper feeding device 40 do not convey the sheet as a recording medium, the entire relay conveyance path 45 (second sheet conveyance path) and the vertical conveyance path ( A configuration in which the third sheet conveyance path) 46 is omitted may be employed. In that case, the number of parts can be further reduced.

  Similarly, in the case of the second paper feeding device 50, only the second paper feeding device 50 shown in FIG. 7 is connected to the printer device 10 for use (only one second paper feeding device 50 is used as a mass paper feeding device). In the case of connecting a plurality of mass feeding devices to the printer device 10 and connecting the second paper feeding device 50 to the most upstream side, the relay conveyance path (second paper conveyance path) 45 Some conveyance paths 45a are not necessary.

  Therefore, the second paper feeding device 50B illustrated in FIG. 10 is configured not to include the conveyance path 45a which is a part of the relay conveyance path. Except that the conveyance path 45a is not provided, it is the same as the second paper feeding device 50 in FIG. Originally, the conveyance path 45a is configured to be able to be pulled out in the front direction of the apparatus (the direction perpendicular to the drawing and upward) as described above. Therefore, it is extremely easy to omit the conveyance path 45a.

  In the second sheet feeding device 50B of the present example, since the conveyance path 45a, which is a part of the relay conveyance path, is omitted as described above, the apparatus configuration is simplified and the apparatus cost can be reduced. Even in such a case, when only one second sheet feeding device 50B is used as the large amount sheet feeding device, or when the second sheet feeding device 50B is connected to the most upstream side even when a plurality of large number sheet feeding devices are used. Can provide a function that is not different from that of the second paper feeding device 50 of FIG.

Next, still another example of the first paper feeding device 40 and the second paper feeding device 50 will be described with reference to FIGS. 11 and 12.
First, another example of the second paper feeding device 50 will be described. A second paper feeding device 50C shown in FIG. 11 adds a straight conveyance path 45c to the relay conveyance path 45 (second sheet conveyance path) to form a second sheet conveyance path with the conveyance paths 45a to 45c. The skew feeding path 46b is added to the vertical conveying path 46 (third sheet conveying path), and the third sheet conveying path is configured by the conveying paths 46a and 46b. The other configuration is the same as that of the second paper feeding device 50 in FIG.

  The height position of the paper carry-out portion F3 in the skew conveyance path 46b is provided to be the same height position as the paper carry-in portion F4 in the straight conveyance path 45c. In addition, a switching claw 56 is provided for switching the conveyance direction of the sheet fed from the manual sheet feeding device 51 to the vertical conveyance path 46a or the skew conveyance path 46b. By switching the position of the switching claw 56 with a solenoid (not shown) or the like, the conveyance direction of the manually fed paper is switched.

  A first paper feeding device 40C shown in FIG. 12 is configured by adding a straight conveyance path 45c to the relay conveyance path 45 (second sheet conveyance path) to form a second sheet conveyance path with the conveyance paths 45a to 45c. The skew feeding path 46b is added to the vertical conveying path 46 (third sheet conveying path), and the third sheet conveying path is configured by the conveying paths 46a and 46b. Other configurations are the same as those of the first paper feeding device 40 in FIG. 3, and redundant description is omitted.

  The height position of the paper carry-out part E3 in the skew conveyance path 46b is provided to be the same height position as the paper carry-in part E4 in the linear conveyance path 45c. In the first paper feeding device 40C, it is not necessary to transport the sheet as a recording medium from the image reading device 60 and the ADF 70, and therefore it is not necessary to provide the skew feeding path 46b and the paper carry-out portion E3. The skew feeding path 46b and the paper carry-out part E3 are still provided for sharing with the two paper feeding devices 50C. The switching claw 56 has been removed.

  When the second paper feeding device 50C is connected to the subsequent stage of the first paper feeding device 40C of the present example configured as described above, the first paper feeding device 40C is enlarged as shown in FIG. The paper carry-in part E2 and the paper carry-out part F1 of the second paper feed device 50C are connected, and the paper carry-in part E4 of the first paper feed device 40C and the paper carry-out part F3 of the second paper feed device 50C are connected. Is done. Then, by switching the switching claw 56 of the second paper feeding device 50C to the position shown in the figure, the paper fed from the manual paper feeding device 51 passes through the skew feeding path 46b from the feeding path 54 to the first feeding. It is delivered to the straight conveyance path 45c of the paper device 40C. As a result, the sheet from the manual sheet feeding device 51 is conveyed through the first sheet feeding device 40C through the relay conveyance path 45 (second sheet conveyance path) and further to, for example, the printer apparatus 10 connected to the subsequent stage. Supplied with.

  Since the sheet from the manual sheet feeding device 51 is sent to the first sheet feeding device 40C in the previous stage without passing through the vertical conveyance path 46a and the first sheet conveyance path 44, the number of bent portions in the sheet conveyance path is reduced. Further, the margin in the sheet conveyance is increased, and the sheet conveyance reliability can be improved.

  Further, since the paper conveyance path length from the manual paper feeding device 51 can be shortened, the paper conveyance control from the manual paper feeding device 51 can be prevented from being complicated, and the paper conveyance reliability can also be improved in this respect.

  That is, when paper is fed from the manual paper feeder 51 via the vertical conveyance path 46a and the first paper conveyance path 44 without using the skew conveyance path 46b, the paper is fed from the paper feed trays 41 and 42. Compared to this, the length of the paper transport path becomes longer. As a result, when paper is fed from the manual paper feeder 51, it may be necessary to control the paper pick-up timing to be earlier than the image forming timing in the printer device 10. In this case, the paper feed trays 41 and 42 need to be controlled. Therefore, a control different from the paper conveyance control in the paper feeding from the printer is required. This complicates the control program related to paper conveyance. However, as described above, the paper conveyance path length can be shortened by feeding paper through the oblique conveyance path 46b, and the same paper pick-up timing as the paper feeding from the paper feed trays 41 and 42 can be achieved. Control complexity can be prevented.

Next, still another example of the first paper feeding device 40 and the second paper feeding device 50 will be described with reference to FIGS. 14 and 15.
When only the second paper feeding device 50C in FIG. 11 is connected to the printer device 10 or when a plurality of mass paper feeding devices are connected to the printer device 10, the second paper feeding device 50C is placed on the most upstream side. In the case of connection to a part of the transport path 45a and 45c of the relay transport path (second paper transport path) 45, it is not necessary.

  Therefore, the second paper feeding device 50D shown in FIG. 14 is configured not to include the transport paths 45a and 45c which are part of the relay transport path. Except that the conveyance paths 45a and 45c are not provided, the second paper feeding device 50C is the same as the second paper feeding device 50C in FIG. As described with reference to FIG. 13, in the case of a system configuration capable of feeding paper from the manual paper feeder 51 through the conveyance paths 46b and 45c, a configuration in which the entire relay conveyance path 45 is omitted is also possible. .

  Then, since the image reading device 60 and the ADF 70 included in the first paper feeding device 40C of FIG. 12 do not carry the paper as the recording medium, the first paper feeding device 40D shown in FIG. A configuration in which the third sheet conveyance path 46 is omitted may be employed. The first paper feed device 40D is the same as the first paper feed device 40C in FIG. 12 except that the third paper transport path 46 is not provided, and redundant description is omitted.

  Further, when only the first paper feeding device 40D is connected to the printer device 10 or when a plurality of mass paper feeding devices are connected to the printer device 10, the first paper feeding device 40D is used as the most upstream mass feeding device. When one sheet feeding device 40D is connected, the relay conveyance path (second sheet conveyance path) 45 is not necessary. Therefore, a configuration without the transport paths 45a and 45c which are part of the relay transport path may be employed. Or the structure which abbreviate | omitted the relay conveyance path 45 whole is also possible.

  By the way, many image forming apparatuses such as printers are provided with a paper lateral registration correction mechanism (a mechanism for correcting the paper position in a direction orthogonal to the paper transport direction). Normally, in order to improve the correction operation during the horizontal registration correction operation, a conveyance roller separation mechanism for bringing the paper into a free state is generally provided together with the horizontal registration correction mechanism.

  However, in a conventional image forming apparatus having such a lateral registration correction mechanism and a conveyance roller separation mechanism, the size in the width direction of the image forming apparatus is increased (roller) when it is possible to handle a long sheet. Increasing the number of transport rollers provided with a separation mechanism). Accordingly, the apparatus becomes larger, and the cost increases due to the increase in the size of components such as the exterior cover. Further, the installation area of the image forming apparatus and the system increases due to the increase in the apparatus size.

Therefore, in the present invention, it is proposed that the image forming apparatus and the mass feeding device connected to the image forming apparatus be configured so that lateral registration correction can be performed on a long sheet.
The image forming system shown in FIG. 16 is configured by connecting a second paper feeding device 50E, which is a mass paper feeding device, to a printer device 10B as an image forming device. The printer device 10B has the same basic configuration as the printer device 10 described in FIG. The second paper feeding device 50E has the same basic configuration as the second paper feeding devices 50 to 50D described with reference to FIG. Each overlapping description is omitted, and different points are mainly described.

  In FIG. 16, the conveyance roller 25 immediately upstream of the registration roller 11 of the printer apparatus 10B is provided with a lateral registration correction mechanism (not shown). As the lateral registration correction mechanism, a known mechanism can be used. For example, a jogger system or a skew roller system can be adopted.

  In the printer apparatus 10B, among the conveyance rollers positioned upstream of the conveyance roller 25 provided with the lateral registration correction mechanism, three conveyance rollers 26-1 to 26-3 denoted by reference numerals in FIG. A roller separation mechanism 28 shown in FIG. 17 is provided. Each of the transport rollers 26-1 to 26-3 is provided with a sensor 27 that is a sheet detection unit at a position immediately downstream thereof. FIG. 17A is a plan view of the roller separation mechanism, and FIG. 17B is a front view.

  The roller separation mechanism 28 of this example enables the driven rollers 26b of the transport rollers 26-1 to 26-3 to be in contact with and separated from the driving roller 26a. That is, in FIG. 17, the lower end portion of a swing member 32 supported so as to be swingable about the shaft 33 is connected to the tip of the arm 31 a of the solenoid 31. A swinging claw 34 is arranged so that one side is in contact with the upper end of the swinging member 32. The swing claw 34 is a member fixed to the shaft 35 and supported so as to be swingable. A pressing member 36 is mounted on a shaft 35 and supported so as to be swingable so as to be coaxial with the swinging claw 34. The pressing member 36 is brought into contact with the driven roller shaft 29 supporting the driven side roller 26b in the vicinity of the upper end portion thereof. The driven roller 26b is pressed against the driving roller 26a by a biasing member (not shown).

  In such a roller separation mechanism 28, when the solenoid 31 is turned on, the arm 31a is drawn, and the swinging member 32 is rotated to a position indicated by a two-dot chain line in the drawing. Then, the upper end portion of the swinging member 32 pushes the swinging claw 34 and rotates it to a position indicated by a two-dot chain line in the drawing. As a result, the shaft 35 rotates, and the pressing member 36 also rotates to the position indicated by the two-dot chain line in the drawing. The driven roller shaft 29 is pressed by the rotated pressing member 36, and the driven roller 26b is separated from the driving roller 26a. When the solenoid 31 is turned off, each member is returned to the position indicated by the solid line by the action of a biasing member (not shown) that presses the driven roller 26b. As a result, the driven roller 26b is pressed against the driving roller 26a.

  Next, the second paper feeder 50E includes first to third paper transport paths 44 to 46. Conveying rollers are appropriately disposed in the respective sheet conveying paths. Further, the manual sheet feeding device 51 includes a paper conveyance path 54, and three conveyance rollers 54-1 to 54-3 are arranged in the paper conveyance path 54. Among the conveyance rollers arranged in each of these sheet conveyance paths, four conveyance rollers 44-1, 44-2, 45-1, 46-1 in the second sheet feeder main body, which are denoted by reference numerals in FIG. Each of the three transport rollers 54-1 to 54-3 of the manual sheet feeder 51 includes a roller separation mechanism 28 shown in FIG. In addition, each transport roller including the roller separation mechanism 28 includes a sensor 27 serving as a sheet detection unit at a position immediately downstream.

  In the image forming system of the present example configured as described above, the lateral registration correction of the paper is performed by the lateral registration correction mechanism at the time of image formation. Further, during the lateral registration correction operation, each conveyance roller 26 provided with the roller separation mechanism 28 in the printer apparatus 10B, or each conveyance roller 26 in the printer apparatus 10B and the roller separation mechanism 28 in the second paper feeding device 50E are provided. The roller separation mechanism 28 is operated (each solenoid 31 is turned on) such that the driven roller 26b is separated from the driving roller 26a. Thereby, the lateral registration correction operation can be performed satisfactorily. When the lateral registration correction operation is completed (in this example, when the sensor 27 attached to each conveyance roller detects passage of paper), the solenoid 31 is sequentially turned off in each conveyance roller, and the driven roller 26b is driven. It is pressed against the side roller 26a.

  Here, when the sheet to be subjected to the lateral registration correction is fed from the paper feed trays 14a and 14b included in the printer apparatus 10B, and even when the sheet is fed from the second paper feeding apparatus 50E, the lateral registration correction is performed. In the case of paper of a size that is possible in the printer 10B, the transport roller (in the main body and the manual paper feeder 51) of the second paper feeder 50E does not need to operate the roller separation mechanism 28. It is preferable to keep the roller separation mechanism 28 of the conveyance roller of the paper feeding device 50E off.

  As can be seen from FIG. 16, the two paper feed trays 41 and 42 provided in the second paper feed device 50E accommodate and feed paper having a size larger than the paper feed trays 14a and 14b provided in the printer device 10B. Is possible. Further, a longer sheet can be fed from the manual sheet feeding device 51. In the image forming system of this example, when a long sheet is fed from the sheet feeding trays 14a and 14b and the manual sheet feeding device 51 (a sheet of a length that cannot be subjected to lateral registration correction only in the printer device 10B). The roller separation mechanism 28 is operated so that each of the conveyance rollers 26 in the printer apparatus 10B and each of the conveyance rollers including the roller separation mechanism 28 in the second paper feeding device 50E is separated from the driving side roller 26a. (Each solenoid 31 is turned on). As a result, the lateral registration correction operation can be satisfactorily performed even with a long sheet.

  Even when, for example, a 2 m long sheet is fed from the manual sheet feeding device 51, all the conveyance rollers on the upstream side of the conveyance roller 25 provided with the lateral registration correction mechanism are in the separated state during the lateral registration correction operation (the driven side). Since the roller 26b is separated from the driving roller 26a), the sheet is in a free state, so that it is possible to perform good lateral registration correction and good printing.

  Further, since the configuration is such that the lateral registration correction operation is performed on a long sheet including not only the printer apparatus 10B but also a large-volume sheet feeding apparatus (here, the second sheet feeding apparatus 50E) connected to the printer apparatus 10B, the printer apparatus Without increasing the device width of 10B, the size of parts such as exterior covers and the size of the main body of the image forming apparatus can be prevented, cost increases can be suppressed, and an image forming system that can handle long sheets can be made inexpensive. Can be provided. Further, the installation space for the printer device and the image forming system is not increased.

As mentioned above, although this invention was demonstrated by the example of illustration, this invention is not limited to this.
For example, the number of paper feed trays mounted on the mass paper feeder is arbitrary, and one or three or more trays may be provided. The location of the paper transport path (relay transport path) for relaying the paper from the large-volume paper feeder connected to the rear stage to the front stage apparatus is not limited to the upper part of the apparatus, for example, between a plurality of paper feed trays It is also possible to have a configuration in which a relay conveyance path is arranged in

  Also, the names of the first paper feeding device and the second paper feeding device in the image forming system of the illustrated example are given for convenience according to the order of connection to the image forming device. The order and the number of items can be set as appropriate within the connectable range.

  Arbitrary configurations can be employed for the image reading device, automatic document feeder (ADF), and manual paper feeder that are mounted on the mass paper feeder. Further, the apparatus for expanding or supplementing the functions of the image forming apparatus mounted on the large-volume sheet feeding apparatus is not limited to the image reading apparatus, automatic document feeder (ADF), and manual sheet feeding apparatus shown in the drawings. Appropriate ones can be mounted. For example, an editor board for performing complicated and high-precision editing, a large display device, and the like can be considered.

  The image forming method in the image forming apparatus is arbitrary. As the color image forming apparatus, a tandem direct transfer method, a method in which a plurality of developing devices are arranged around one image carrier, or a rotary developing device is used. A method can also be adopted. Moreover, a monochrome apparatus may be sufficient. Appropriate configurations can be employed for each part such as a fixing device and an optical writing device. Further, the image forming method is not limited to electrophotography, and any method such as an ink jet method can be adopted. A device having a facsimile function is also possible.

DESCRIPTION OF SYMBOLS 10 Printer apparatus 11 Registration roller 28 Roller separation mechanism 40 1st paper feeder (mass paper feeder)
41, 42 Paper feed tray 44 Paper transport path (first paper transport path)
45 Relay transport path (second paper transport path)
45c Straight conveyance path 46 Vertical conveyance path (third paper conveyance path)
46b Inclined transport path 50 Second paper feeding device (mass feeding device)
60 Image reader 70 Automatic document feeder (ADF)
90 Auxiliary frame 91 Image reading device holding portion 92 Hinge holding portion 49 Main body portion 48 Main body frame 51 Manual paper feeding device GC Exterior cover

JP-A-6-250455 JP 2005-239351 A

Claims (9)

A paper feeding device that does not have an image forming unit and is connected to the image forming device ,
The image reading device and the manual paper feeding device are configured to be selectively detachable from the same mounting site,
The sheet feeding device, wherein the attachment portion is located above a conveyance port that receives a sheet-like sheet conveyed from the manual sheet feeding device when the manual sheet feeding device is mounted . The sheet feeding device according to claim 1, wherein the image reading device is mounted via an auxiliary frame, and the manual sheet feeding device is mounted without using the auxiliary frame . Wherein the conveying path for receiving a sheet-like paper the manual sheet feeder is conveyed from the該手sheet feeder when it is mounted is removably mounted, the sheet according to claim 1 or 2 Paper device. Image forming system comprising an image forming apparatus, in that it is composed of a sheet feeding apparatus according to any one of claims 1 to 3 connected to the image forming apparatus. The image forming system according to claim 4 , wherein a plurality of the sheet feeding devices are connected. The image forming system according to claim 5 , wherein the image reading device is mounted on a main body frame of one of the plurality of paper feeding devices connected. The image forming system according to claim 6 , wherein the image reading apparatus is mounted on the main body frame via a removable auxiliary frame. The image forming system according to claim 7 , wherein another one of the plurality of connected sheet feeders does not include the auxiliary frame. Wherein the plurality of connected sheet feeding other one of the sheet feeding device of the apparatus, characterized in that it is equipped with the manual sheet feeder to the body frame, any one of claims 6 to 8 1 The image forming system according to item.

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