JPS608861A - Both-surface copying machine - Google Patents

Abstract

PURPOSE:To facilitate transportation and improve the efficiency of assembling operation by providing paper feeder for both-surface copying as an attachment to a copying machine body having a both-surface copying function, and varying its attitude and feeding copying form to the form conveyance path of the copying machine body. CONSTITUTION:When the device housing 70 of the paper feeder B for both-surface copying is drawn out of a cabinet 140 on which the copying machine body A is mounted to make a normal one-surface copy by using only the copying machine body A, a copied form C is discharged onto a paper discharge tray 121 immediately. Further, when the device housing 70 of the paper feeder B for both- surface copying is stored in the cabinet 140 to take a both-surface copy, the copy form discharged onto a tray 91 through a conveyance path switching device 80 is sent into the main body housing 30 again from the device housing 70 through between guide plates 106 and 107 to take a rear copying.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double-sided copying machine, and more particularly to a paper feeding device for double-sided copying.

[Prior art]

FIG. 1 shows a conventional double-sided copying machine.

In this copying machine, one sheet of copy paper 3 from a paper feed cassette 2 loaded in a lower side plate of a housing 1 is taken out by a paper feed roll 4, and is sent onto a transport belt 6 by a transport roll 5. The photoreceptor is transported to the photoreceptor 7 by.

The copy paper 3 thus conveyed to the photoreceptor 7 has the toner image thereon transferred thereto, and is further conveyed to the fixing roll 8 . The copy paper 3 that has passed through the fixing roll 8 is guided by a conveyance path switching device 9 to a posture change device 1°, where it is turned upside down with the copy side facing up and transferred to a conveyor belt 11 for double-sided copying. be guided. The copy paper 3 sent to the conveyor belt 11 is again sent by the belt to the first conveyance path, that is, the conveyor belt 6, and is again sent to the photoreceptor 7 with the back side of the copy paper 3 facing up.
A toner image corresponding to a written image on the other side of the document is transferred by the photoreceptor. The copy paper 3 copied in this manner is sent to the fixing roll 8, guided by the conveyance path switching device 9 to the paper ejection roll 12, and further ejected onto the paper ejection tray 14 by the ejection roll 13.

Further, when copying only one side of the copy paper 30 using this double-sided copying machine, the conveyance path switching device 9 may be set in the state indicated by the dotted line. That is, the copy paper 3 taken out from the paper feed cassette 2 by the paper feed roll 4 is sent to the photoreceptor 7 by the transport roll 5 and the transport belt 6.
There, it is copied and sent to the fixing roll 8, further guided to the paper ejection roll 12 by the transport path switching device 9, and ejected onto the paper ejection tray 14 by the paper ejection roll and the ejection roll 13.

In FIG. 1, numeral 15 is a platen, numeral 16 is a light source, numerals 17 and 18 are reflecting mirrors, and numerals 19 are lenses, and these platen 15, light source 16, and reflecting mirrors 17 and 18.
and lens 19 constitute an optical scanning system.

By the way, conventional double-sided copying machines, including the one mentioned above,
All mechanisms for double-sided copying are housed in one housing 1. Therefore, in conventional double-sided copying machines, the copying machine casing is large and requires time and effort to transport, which limits the ability to increase the efficiency of assembly work and reduce costs.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a double-sided copying machine that is easy to transport, increases assembly efficiency, and reduces costs.

[Structure of the invention]

In order to achieve such an object, the present invention provides a copying machine that is equipped with all the functions of copying one side of copy paper, and an attachment that changes the posture of the copy paper and connects it to the paper conveyance path of the copy machine main body. A paper feeding device for duplex copying that feeds the copy paper again is prepared, thereby making the main body of the copying machine common to a general single-sided copying machine, and a separate assembly process for the paper feeding device for duplex copying. This makes it possible to reduce costs and increase the efficiency of assembly work, as well as to allow separate transportation.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings. 2 to 5 show each mechanism of the double-sided copying machine according to the present invention.

This copying machine consists of a copying machine body A that has all the functions for single-sided copying, and a paper feeder B for double-sided copying that has auxiliary functions for double-sided copying.

The copying machine main body A includes an optical scanning means 4 on the upper part of the main body casing 30.
0, the copying means 50 is in the center, and the paper conveying means 60 is at the bottom.
are installed respectively. The light scanning means 40 includes a platen 41, a light source 42, a reflecting mirror 43, 44, a lens 45, etc., of which the light source 42 and the reflecting mirror 43 are connected to the platen 4.
It runs parallel to the platen below the platen 4.
The original on 1 is optically scanned, and the image of the original is transferred to the photoreceptor 5.
1. The copying means 50 includes a photoreceptor 51 and a photoreceptor 18.
152. Consisting of a transfer corotron 53, a cleaning device 54, etc., as the photoreceptor 51 rotates, a latent image formed on the photoreceptor 51 by optical scanning is developed by a developing device 52, and this toner image is copied by the transfer corotron 53. The image is transferred onto the paper C, and any remaining image or the like on the photoreceptor 51 thereafter is removed by the cleaning device 54. The paper transport means 60 includes a paper cassette 61, a paper feed roll 62, a guide grate 63, 64, 65, a registration storage opening roll 66, a vacuum transport 67, and a user 68.
, a discharge roll 69, etc., and the copy paper C in the paper cassette 61 loaded in the lower opening 31 of one of the main body casing 30 is passed through the photoreceptor 51 to the other lower opening of the main body casing 30. Convey up to 32. A paper feed roll 62 is positioned above the paper cassette 61, and separates and takes out copy paper C in the cassette one by one. The guide plate 63 extends from the bottom opening 33 of the main body housing 30 to below the photoreceptor 51, and the guide plate 64 extends from above the paper feed roll 62 to near the photoreceptor 51.
5 extends from below the paper feed port 61 a of the paper cassette 61 to near the registration roll 66 . The registration roll 66 is a guide plate 63.6
4, and the photoreceptor 51
Copy paper C is conveyed in synchronization with the above document image. The vacuum transport 67 peels off the copy paper C that has been brought into close contact with the photoreceptor 51 during transfer, and transports the copy paper C to the user 68. The vacuum transport 67 peels off the copy paper C that is in close contact with the photoreceptor 51 during transfer, and transports the copy paper C to the user 68. The paper C is attracted onto the belt 67b. The user 6B is installed immediately after the vacuum transport 67, and is connected to the transformer row? - The toner image on the copy paper C conveyed by the toner is fixed onto the paper.

The ejection roll 69 is installed between the user 68 and the side opening 32 of the main body housing 30, receives copy paper C from the user 68, and discharges the paper through the side opening 32 to the outside of the main body housing 30.

The double-sided copying paper feeding device B has its respective mechanisms installed within an L-shaped device housing 70. The device housing 70 has a copy paper ejecting lower 1 formed on its inner side plate, a copy paper ejecting lower 2 formed on its inner upper plate, and a first open lower lower 3 formed on its outer side plate. and a second open lower lower 4 is formed. This device housing 70 includes a conveyance path switching means 80. A paper posture changing means 90 and a paper conveying means 100 are provided, and a double feed prevention device 1 for copy paper C is provided.
10, paper discharge device 120 and paper alignment device 130 (third
(see figure) etc. are provided. The conveyance path switching means 80 is
The main element is a flag 81 that rotates at a certain angle, and the tip 81a of the flap 81 is attached to the device housing 70.
It is facing the lower 1 with copy paper. The paper posture changing means 90 has a tray 91 as its main element, and is installed with one end 91m of the tray facing the second opening lower 4 of the device housing 70. The paper conveyance means 100 includes an upper conveyance section 101 that conveys the copy paper C from the conveyance path switching means 80 to the paper attitude change means 90, and an upper conveyance section 101 that conveys the copy paper C from the paper attitude change means 90 to the copy paper output lower 2 of the apparatus housing 70. and a lower conveyance section 102 for conveyance. and,
The upper conveying part 101 has guide plates 103, 104
A conveyance path is formed by the conveyance path, and a paper discharge roll 105 is disposed at the lower end thereof, and a lower conveyance portion 102 is provided.
A conveyance path is formed by the guide plates 106 and 107, and conveyance rolls 108 are disposed at both ends and in the middle thereof. The double feed prevention device 110 includes a housing 111, a paper feed roll 112, a sorting roll 113, and a tray 91, each of which is pivotally supported by the housing.
As shown in FIG. It is interlocked with the sorting roll 113 by a driving gear 113a and a floating gear 115 installed between these gears. Further, in this tuple feed prevention device 110, a housing 111 is connected to an eccentric plate 117 via a link 116, and is connected to a power source such as a motor (not shown) via a shaft 118 of the plate. axis 119
It is also connected to a power source such as a motor (not shown). As shown in FIG. 2, the paper ejection device 120 includes a paper ejection tray 121 installed in the first open lower lower part 3 of the device housing 70, a paper ejection roll 122 installed at one end of the tray, and the roll. The copy paper C guided by the conveyance path switching means 80 is discharged to the paper discharge tray 121 through a guide grate 123 extending from the conveyance path switching means 80 to above the conveyance path switching means 80 .

The paper aligning device 130 shown in FIG.
31 and the rack 1 fixed to each of those grates.
32 and a binion 133 that is located between those racks and meshes with those racks 132. By rotating the binion 133, the rack 132 is moved toward the middle of the tray 91, and thereby the side grate 13
The distance between the copy sheets 1 and 1 approximately matches the distance 1] of the copy sheets C, thereby aligning the copy sheets C on the tray 91. The binion 133 is driven by a power valve such as a motor (not shown). In addition, in FIG. 3, reference numeral 82 is a shaft supporting the flag 81 of the conveyance path switching means 80, and this shaft 82 is connected to a cam follower 83 fixed to the shaft and the shaft 1.
It is interlocked with the shaft 118 via a cam 84 fixed to the shaft 118 .

The operation of the copying machine described above will be explained below, and its configuration will also be explained in more detail. After turning on the power of the copying machine, the first operation for double-sided copying is to operate the button D, and the drive motor (not shown) of the shaft 118 in FIG. The housing 111 of the double feed prevention device 110 is rotated in the direction of the arrow via the link 116 interlocked therewith, thereby separating the paper feed roll 112 from the tray 91. The rotational force of the shaft 118 also rotates the cam 84 in the direction of the arrow, and the cam operates the lower cuff 83 to rotate the shaft 82, thereby moving the flag 81 of the conveyance path switching means 80 in the direction of the arrow. Rotate. Next, when the paper cassette 61 containing copy paper C of an appropriate size is loaded into the opening 31 of the main body housing 30, the motor (not shown) of the paper alignment device 130 is driven based on the signal, and the paper cassette 61 containing copy paper C of an appropriate size is driven. is rotated, the rack 132 is moved, and the distance between the side grates 131 is adjusted to a width corresponding to the copy paper C.

In this way, the copying machine enters the first standby state for double-sided copying. Here, set the original on the platen 41,
When a start button (not shown) is operated, the light source 42 and reflecting mirror 43 of the optical scanning means 40 travel along the document on the platen 41, and image the document image on the photoreceptor 51. An electrostatic latent image is formed on the photoreceptor. This latent image is converted into a toner image by a developing device 52 as the photoreceptor 51 rotates. On the other hand, copy paper C in the paper drawer and trolley 1
is taken out by a paper feed roll 62, passed between guide plates 64 and 65, sent to a registration storage four roll 66, and conveyed to the lower part of the photoreceptor 51 by the roll. The copy paper C thus conveyed by the photoreceptor 511 is brought together with the toner image on the photoreceptor 51, and the toner image is transferred by the transfer corotron 53. Furthermore, this copy paper C is conveyed to a user 68 by a vacuum transport 67, and after the toner image is fixed there, it is discharged from the opening 32 of the main body casing 30 by an ejection roll 69 to the outside of the main body casing 30. The copy paper C ejected from the opening 32 in this manner is received from the input lower 1 of the device housing 70 of the double-sided copy paper feeding device B, and is guided by the fluff 681 of the conveyance path switching device 80 (103° 104). The output roll 1 is guided between the
05 onto the tray 91. The above operation is repeated as many times as the number of sheets of copy paper C to be copied, and the copied copy paper C is as shown in FIG.
As shown in FIG.

When single-sided copying for the set number of sheets is completed in this manner, the second operation button E for double-sided copying is operated. Then, the drive motor (not shown) of the shaft 118 in FIG. The housing 111 is rotated in the direction opposite to the arrow, whereby the paper feed roll 1
12 is brought into contact with the tray 91. At the same time, axis 1180
The rotational force rotates the cam 84 in the direction opposite to the arrow, and the cam operates the cam follower 83 to rotate the shaft 82, thereby causing the fluff '81 of the conveyance path switching means 80 to rotate.
Rotate in the opposite direction of the arrow. In this way, the copying machine enters the second standby state for double-sided copying. Here, when the original on the platen 41 is set on the other side to be copied and the start button (not shown) is operated, the drive motor (not shown) of the shaft 119 in FIG. 3 is activated.
A sorting roll 113 is rotated via the shaft, and a driving gear 113a, an idler gear 115, and a driven gear 11 are rotated.
Paper feed roll 112 is rotated via 2a. When the paper feed roll 112 and the sorting roll 113 are rotated in this way, the tray 9
The uppermost copy sheet C stacked on top of the copy sheet C is fed in the direction of the arrow by the paper feed roll 112 and delivered to the conveyance roll 108 of the lower conveyance section 102 as shown in FIG. 4(C). At this time, as the topmost copy paper C moves, the copy paper C' below it also tries to move, but this copy paper C' hits the handling plate 114 and is prevented from moving. If the copy paper σ is used together with the copy paper C, the processing roll 113 and the processing grate 114
Even when reaching the middle, the friction coefficient μl between the handling roll 113 and the copy paper C, the friction coefficient μ2 between the cutting paper C and the copy paper 07, and the friction coefficient μ3 between the copy paper C' and the cutting grate 114 are as follows. Since the distances are set to be μ2, μ3, and μm, respectively, the copy paper C' remains there, and only the copy paper C is sent to the transport roll 108.

In this way, the copy paper C sent to the transport roll 108 is guided by the guide sheet 106 in FIG.

107 to the copy paper output lower 2 of the device casing 70 by a transport roll 108, and from the exit to the copy paper output lower 2 of the device casing 70.
0 is ejected outside. This copy paper C is sent into the housing again from the opening 33 of the main body housing 30, and is sent to the guide sheet tray 3.
．． 65 to a registration roll 66, and is conveyed to a discharge roll 69 via a photoreceptor 51 in the same manner as in the one-sided copying described above. Of course, during this time, the toner image on the photoreceptor 51 of the copy paper C is transferred to the back side of the paper by the transfer corotron 53, and then fixed by the fuser 68. The main body casing 30 is
The copy paper C discharged to the outside is discharged onto the paper discharge tray 121 by the fluff "81 of the conveyance path switching device 80, and then by the paper discharge roller 122. The above-mentioned operation The process is repeated for the number of copies of the copy paper C, and the copy paper C with copies made on both sides is stacked on the paper discharge tray 121.

Next, a case will be described in which this double-sided copying machine is used to copy only one side of copy paper C like a general copying machine. In this case, by operating the single-sided copy button F of the copying machine, the fluff '8' of the conveyance path switching device 80 is activated.
1 toward the paper discharge roll 122. When the start button (not shown) is operated in this state, the copy paper C in the paper cassette 61 is taken out by the paper feed roll 62 and sent to the registration roll 66 through the guide gray) 64 and 65. Then, it is conveyed to the lower part of the photoreceptor 51 by the roll. The copy paper C conveyed to the photoreceptor 51 in this manner is combined with the toner image on the photoreceptor, and the toner image is transferred by the transfer corotron 53. Further, the paper C is conveyed to a fuser 68 by a vacuum transport 67, and after the toner image is fixed there, it is discharged from the opening 32 of the main body casing 30 to the outside of the main body casing 30 by an ejection roll 69. The copy paper C discharged from the opening 32 in this manner is received from the input lower 1 of the device housing 70 of the double-sided copying paper feeder B, and guided to the paper output roll 122 by the flap 81 of the conveyance path switching device 80. The paper is then discharged onto the paper discharge tray 121 by the paper discharge roll.

In addition, if you want to remove the paper feeder B for double-sided copying from this double-sided copying machine and use only the main body A of the copying machine to perform only normal one-sided copying, the main body housing 3
The paper discharge tray 121 may be installed in the opening 32 of 0. In that case, the copy paper C discharged by the paper discharge roll 69 will be immediately discharged onto the paper discharge tray 121.

FIG. 5 shows the appearance of the double-sided copying machine of this embodiment. In this copying machine, the device casing 70 of the double-sided copy paper feeding device B is placed in a cabinet 14 on which the copying machine main body A is placed.
The rails 75 fixed to both sides of the device casing 70 are received by guide rails (not shown) installed in the cabinet 140, thereby making the device casing 70 detachable. I support it. Further, a lever 76 is installed on the device casing 70, and the device casing 70 is pulled out from the cabinet 140 by this lever.

In the above-mentioned embodiments, the paper feeding device B for double-sided copying is shown as being equipped with various mechanisms, but in order to achieve the object of the present invention, the conveying path switching means 80 and the paper posture changing means 90 are required. and paper conveyance means 100. That is, when the double feed prevention means 110 copies one side of the copy paper C in the paper cassette 61 and then copies the back side of the paper without first loading the copy paper C on the tray 91, unnecessary. In this case, when the copy paper C on which one side has been copied is ejected onto the tray 91, it is immediately turned upside down and placed on the transport roll 10.
Leads to 8. Further, the paper ejecting device 120 is connected to the copying machine main body A.
It can be installed in the housing 30 of. In this case,
When the device casing 70 is set at a predetermined position on the main body casing 30, the flap 81 of the conveyance path switching means 80
What is necessary is just to position it so that it may face the conveyance path of 20. Furthermore, it goes without saying that the paper alignment device 130 is not necessary when the copy sheets C being conveyed are discharged onto the tray 91 without being disturbed, or when they are properly aligned during conveyance.

Further, the conveying path switching means 80, the paper posture changing means 90, and the paper conveying means 100 are not limited to those shown in the above embodiments, and various types of conventionally adopted ones can be adopted. 0 [Effects of the Invention] As described above, the duplex copying machine according to the present invention has the following functions:
A separate paper feeder for duplex copying is provided as an attachment that changes the orientation of the copy paper and feeds the copy paper back into the paper transport path of the copy machine body, so the copy machine body can be used as a general single-sided copy machine. It can be made common, thereby reducing costs and streamlining the assembly process.Moreover, since it can be separated and transported, transportation work is also extremely easy.

[Brief explanation of drawings]

Figure 1 is a conceptual diagram showing a conventional double-sided copying machine, Figure 2 is a conceptual diagram showing a double-sided copying machine according to the present invention, Figure 3 is a perspective view showing its main mechanism, and Figure 4 ( a), (b)
, (e) is a conceptual diagram showing the operation of the double-feed prevention device, and FIG. 5 is a perspective view showing the entire double-sided copying machine according to the present invention. A... Copying machine main body, B... Paper feeding device for double-sided copying, 3
()...Body housing, 31.32.33...Opening, 4
0... Optical scanning means, 41... Platen, 42...
Light source, 43.44...Reflection firing, 45...Lens, 50
. . . Copying means, 51 . . . Photoreceptor, 52 . ... Paper feed roll, 63 , 64 , 65 ・
・・Guide grade, 66・・Registration roll, 67・・Nonokyumu Transmash, 68・
... Fuser, 69... Paper discharge roll, 70... Device housing, 71... Copy paper inlet, 72... Copy paper outlet, 73... First opening, 74... Second opening of,
80... Conveyance path switching means, 81... Flap, 90
. . . Paper posture changing means, 91 . . . Tray, 100.
...Paper transport means, 101... Upper transport portion, 1()
2... Lower conveyance part, 103.104... Guide plate, 105... Paper discharge roll, 106.107...
・Guide grate, 108...conveyance roll, 110・
...Double feed prevention device, 111.../Using, 112... Paper feed roll, 113... Sorting roll, 114... Sorting play), 120... Paper ejection device, 121... Paper discharge tray, 122... Paper discharge roll, 123... Guide grate, 130... Paper alignment device, 131... Saip play), 132... Rack, 133... Binion.

Claims (1)

[Claims] An optical scanning means that optically scans the document on the platen and forms a calligraphic image of the document on a photoreceptor, and a device that develops the document image formed on the photoreceptor into a toner image and copies the toner image. A copying machine body including a copying means for transferring the image onto paper and a paper conveying means for conveying the copy paper from one side to the other via a photoreceptor, and a copy paper inlet and a copy paper outlet,
and between them, a double-sided copying paper feeding device having a conveyance path switching means, a paper posture changing means, and a paper conveyance means, the copy paper inlet being connected to the other side of the paper conveyance means of the copying machine main body, and the copy paper A double-sided copying machine characterized in that the outlet is detachably installed so as to communicate with one side of a paper conveyance means of the copying machine main body.