JPH04102357U - electrophotographic facsimile machine - Google Patents

Abstract

(57) [Summary] [Purpose] In an electrophotographic facsimile machine that is a page printer using an electrophotographic method with a fax function added, part or all of the transmission original path and transfer paper path are common, and the Standardize paper rolls and timing sensors to prevent equipment from increasing in cost and size. [Structure] A transfer paper 12 and a transmission document 17 are fed from a first paper feeding means E and a second paper feeding means F, respectively, of an electrophotographic facsimile device P which is a page printer with a facsimile communication function added. A merging portion 20 for the transfer paper 12 and the transmission original 17 is provided on the upstream side of the transfer position of the conveyance path 21 that leads the transfer paper 12 to the fixing position via the transfer position. A reading device R for reading information on the transmission original 17 is provided at the transfer position, and reads the information when the transmission original 17 passes through the transfer position.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an electrophotographic facsimile device, and particularly to a page printer. An electrophotographic type of so-called plain paper facsimile machine with added facsimile communication function. Regarding facsimile devices (PPF).

0002

[Conventional technology]

FIG. 5 shows an example of a plain paper facsimile device. This device has the page shown in Figure 6. Most of the printer functions of the printer are applied as is. That is, Figures 5 and 6 To explain the printer function parts using the same reference numerals, transfer paper is pushed from the paper feed cassette 51. The transfer paper 53 pushed up by the lifting member 52 is transferred to the downstream side by the paper feed roll 54. The paper is fed to the printer and placed on standby at the registration roll 56 via the reversing guide 55. So The information of the fax document entered into the fax communication department (not shown) is For example, the print head 57 including an LED head or the like is uniformly charged with a charger 58. The information is recorded as optical information on the surface of the photoreceptor drum 59, forming an electrostatic latent image. This stillness The electrostatic latent image is developed by a developing device 60, transferred to a transfer paper 53 by a transfer device 61, and then transported. It is guided by a feed guide 62 and fixed on the transfer paper 53 by a fixing device 63. The transfer paper 53 is The paper is ejected to a paper ejection tray section 66 via a paper guide 64 and a paper ejection roll 65. Also, A cleaner 67 is provided near the photoreceptor drum 59, so that the photoreceptor drum 59 can be cleaned after transfer. Toner remaining on the surface of the drum 59 is cleaned. Printer features like this On the other hand, in the facsimile machine shown in Fig. 5, A document table 68 serves as a communication function section on which a transmission document is placed, and a document table 68 serves as a communication function section for guiding the document to a reading section 69. An introduction guide 70, paper feed roll 71, paper ejection roll 72, etc. are provided for A document tray 73 is suspended so that it can be used on a desk.

0003 When sending the original, insert the original in the direction of arrow 74 and The reading section 69 uses a mirror or lens to focus light onto the CCD. The optical signal is converted into an electrical signal by a CCD and transmitted to the other party's facsimile machine. Ru.

0004 Also, when receiving, transfer the transfer paper 53 loaded in the paper cassette 51 one by one. It is fed to the printer function section, printed using electrophotographic methods, and output as a visible image. Ru.

[0005] Feeding originals and transfer paper, driving and stopping various rolls, and adjusting timing as described above. The controllers are installed near the document reading section 69, the paper feed section of the printer section, etc. This is done using different types of sensors.

[0006]

[Problems with conventional technology]

However, with the conventional plain paper facsimile machine as mentioned above, when sending There are separate paths for originals to be sent and transfer paper to be received. Paper rolls, timing sensors, etc. are placed in various places, so the number of parts is limited. This increases the cost and increases the size of facsimile machines.

[0007]

[Purpose of invention]

In view of the above-mentioned circumstances, this invention is designed to improve the manuscript passage when sending and when receiving. Make part or all of the transfer paper path common, and share the paper feed roll and timing sensor. An electrophotographic facsimile machine that is easy to use and does not require high costs or large size. The purpose is to provide a

[0008]

[Key points of the idea]

In order to achieve the above purpose, this invention is a page printer using an electrophotographic method. Transfer paper is used in electrophotographic facsimile machines equipped with fax communication functions. A first paper feeding means for feeding the original, a second paper feeding means for feeding the transmission original, and a transfer A confluence of the transfer paper and the transmission original is formed upstream of the copying position, and the transfer paper and the transmission original are fed. A conveyance path that leads the original document to the fixing position via the transfer position, and a confluence of the conveyance path and the transfer position. and a reading means for reading the information of the transmitted original document which is provided between the It is characterized by

[0009]

【Example】

Embodiments of the present invention will be described in detail below with reference to the drawings. Figure 1 shows the electrophotographic page printer of this invention with a fax communication function added. FIG. 2 shows an enlarged sectional view of the main parts of the facsimile machine P, and FIG. 2 shows a schematic diagram of the overall configuration. ing.

0010 As shown in FIG. 2, the facsimile device P has a rotatable section approximately in the center that can be freely rotated in the direction of the arrow. A charger 2 that uniformly charges the photoreceptor drum 1 disposed in the fax communication section ( The fax document information input into the fax machine (not shown) is transferred to the surface of the photosensitive drum 1 as optical information. A print head 3 including an LED head etc. for recording, a developer 4, a transfer device 5, and a printer. A liner 6, a conveyance guide 7, a fixing device 8, etc. are provided, and the developing device 4 drives the photoreceptor. The toner image formed on the film 1 is transferred to a transfer paper at a transfer position equipped with a transfer device 5, The transfer paper 12 is fixed at a fixing position equipped with a fixing device 8, and the transfer paper 12 after fixing is transferred to a paper discharge guide 9, The paper is discharged onto a tray 11 via a paper discharge roll 10.

[0011] Further, the transfer paper feeding means E for feeding the transfer paper 12 is, for example, a paper feed cassette 13. It includes a paper feed roll 14 that feeds transfer paper 12 one sheet at a time, and a reversing guide 15. It is configured to feed paper up to Stroll 16, but it is also possible to manually feed the paper. Wear.

0012 Furthermore, document feeding means F for feeding the transmission document 17 is provided. figure smell Then, attach the manual feed stand 18 to the reversing guide 15, and insert the original from the manual feed stand 18. Although it is designed to feed the paper, an automatic paper feeder (APF) device may also be used. example For example, an automatic paper feeder (APF) (not shown) may be installed in the manual feed slot 19 of the manual feed table 18. It may also be used together with a manual feed stand.

[0013] Transfer paper 12 fed by the transfer paper feeding means E and original feeding means F or upstream of the transfer position so as to guide the transmission document 17 through the transfer position to the fixing position. A conveyance path 21 having a confluence section 20 formed therein is provided. And the above registrar The roller 16 is provided on the downstream side of the merging section 20, and the transfer paper 12 and the feeder are provided at appropriate locations. A sensor (not shown) is provided to control the conveyance of the transmission document 17.

[0014] The reading means R for reading the information of the transmission document 17 is located at the confluence section 2 of the conveyance path 21. 0 and the transfer position. The reading means R shown in FIG. 1 is an embodiment provided at the above transfer position, and is an LED Aim the ray 22, SELFOC lens 23, and CCD 24 toward the photosensitive drum 1. The fax is transferred from the transmission document 17 that advances along the surface of the photoreceptor drum 1. It is designed to read information. In addition, instead of the above Selfoc lens 23, Lenses and mirrors can also be used.

[0015] Further, the reading means R' shown in FIG. A notch hole 26 is provided in the lower guide plate 25, and a contact image sensor 27 is inserted into the notch hole 26. This is an embodiment in which a light source 28 is provided.

[0016] In addition to the above-mentioned embodiments, the reading means advances in a stable state with the original in close contact with it. If it is a part, it can be provided at an appropriate position. Further, the registration roll 16 is connected to the LED array 22, the CCD 24, the transfer It is synchronized with the device 5, and when a certain amount of documents are sent out, each starts its operation. are equipped with various sensors, etc.

[0017] The operation of this embodiment configured as described above will be explained. When sending a document, insert the document 17 into the manual feed slot 18 and the document will be merged. 20 to the registration roll 16, and the registration roll 16 rotates. As a result, the transmission document 17 enters the transfer position area. At the transfer position, FIG. In the example of the reading means R shown in FIG. For example, the transmission document 17 is electrostatically attracted to the surface of the photoreceptor drum 1 by corona discharge. Close contact. Then, the light from the LED array 22 hits the surface of the transmission document 17, and The reflected light enters the SELFOC lens 23, is condensed, hits the CCD 24, and the CCD The CD 24 converts the optical signal into an electrical signal and outputs the specified facsimile by the control unit 29 (Fig. 2). A signal is sent electronically to the Simili device. The reading means R' shown in FIG. signals can be transmitted electronically.

[0018] On the other hand, when receiving, the electrical signals sent from other facsimile machines are The photoreceptor 1 is rotated in the direction of the arrow and is uniformly charged by the charger 2. The toner image is written as an electrostatic latent image and developed by the developing device 4.

[0019] In the above, the transfer paper 12 loaded in the paper feed cassette 13 is transferred to the paper feed roll 14. The resist roll 16 is fed into the resist roll 16, and the resist roll 16 Since the toner image on the photosensitive drum 1 is synchronized with the drum 1 and the transfer device 5 at the transfer position, is transcribed. At this time, the LED array 22 and CCD 24 are in an OFF state. Yes, it doesn't work. Thereafter, the transfer paper 12 on which the toner image has been transferred is placed at the fixing position. The transferred image is fixed by the fixing device 8 and discharged onto the tray 11.

[0020] In the above embodiment, since the transfer paper 12 and the transmission original 17 share a common transport path, Since the transmission document 17 passes through the fixing section, the transmission document 17 is also heated in the conventional fixing section. It is crimped. Therefore, when the original to be sent 17 is fed, it is not fed at the fixing position. It is desirable to avoid heating the document 17 in order to protect it.

[0021] FIG. 4 shows an example of such a fixing unit, which is in pressure contact with the heat roll 30 of the fixing device 8. Among the rolls 31, for example, the shaft 32 of the pressure roll 31 is inserted into the bearing hole 34 of the frame 33. The tip of an arm 36 is movably supported on the shaft 3 and has one end pivotally connected to the pivot joint 35. 2 and provided between the guide plate 37, the pressure roll 31 is urged in the direction of the heat roll 30. Then, a solenoid is connected to the arm 36. The movable shaft 40 of 39 is connected, and when the original passes through the fixing section, the control section The solenoid 39 is turned on under the control of the controller, and the arm 36 is pulled in the direction of the arrow. , the pressure roll 31 is separated from the heat roll 30. In addition, at this time In some cases, it may be sufficient to simply weaken the pressure contact force. In this case, the pressure roll 31 Even if they are separated, the original is transported by the conveyor roll 42 (see FIG. 2) provided downstream of the fixing device 8. There will be no problem in transporting the documents.

[0022] This embodiment is configured as described above, and is attached to a page printer using an electrophotographic method. Conveys transfer paper or originals to the fixing position via the transfer position with added fax function. A convergence point between the transfer paper and the transmission original is provided on the upstream side of the transfer position in the transmission path, and the The path for originals and the path for receiving transfer paper are partially or completely shared, making it easier to feed The cost of facsimile machines has increased due to the standardization of paper rolls and timing sensors. In addition, if a reading means is provided at the transfer position, the original can be exposed to light. The distance between the document and the CCD can be set with high accuracy because it can be placed in close contact with the body drum. Furthermore, if a reading means is provided on the lower guide plate near the downstream of the registration roll, the original The document is closely spaced and advances stably, improving the accuracy of document reading and receiving. This has the advantage that the resolution of printed characters can be improved and the quality of the printed characters is excellent.

[0023] In the above embodiment, one of the pair of rolls of the fixing device 8 is configured to move, but the document transport At the time of feeding, the heater of the heat roll 30 may be controlled to be turned off, and the above-mentioned It is also possible to control the heater at the same time as controlling the roll movement. Wear.

[0024]

[Effect of the idea]

As described above, according to the present invention, a page printer using an electrophotographic method can Added a transfer function that allows you to change the path of originals when sending and the path of transfer paper when receiving. Because some or all of them are made common, paper feed rolls and timing sensors can be made common. This prevents high cost and size, and also eliminates the transmission source between the transfer position and the merging area. Since a document reading means is provided, the document can be brought into close contact with the photoreceptor drum. The distance between the transmitted document and the CCD can be set with high accuracy, which improves the reading accuracy of the transmitted document. It has the advantage of increasing the print quality and improving the resolution of the received print. Ru.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the main parts of an electrophotographic facsimile apparatus according to the present invention.

FIG. 2 is a schematic configuration diagram of an electrophotographic facsimile apparatus of the present invention.

FIG. 3 is a sectional view showing another embodiment of the reading means.

FIG. 4 is a sectional view showing an example of a fixing section.

FIG. 5 is a schematic configuration diagram of a conventional facsimile device.

FIG. 6 is a schematic configuration diagram of a conventional page printer.

[Explanation of symbols]

1 Photoreceptor drum 5 Transfer device 12 Transfer paper 17 Transmission manuscript 20 Confluence 21 Conveyance path E Transfer paper feeding means F Original feeding means R, R' reading means P facsimile machine

Claims (1)

[Scope of utility model registration request] 1. An electrophotographic facsimile device in which a facsimile communication function is added to a page printer using an electrophotographic method, comprising: a first paper feeding means for feeding transfer paper;
A second paper feeding means that feeds the transmission original, and a confluence part of the transfer paper and the transmission original is formed upstream of the transfer position, and the fed transfer paper and the transmission original pass through the transfer position to a fixing position. 1. An electrophotographic facsimile apparatus comprising: a conveying path for guiding the conveying path; and a reading means provided between a confluence of the conveying path and a transfer position for reading information on a transmitted document being conveyed.