JP2009211020A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly efficient image forming apparatus with an inexpensive configuration which is applicable to various printers. <P>SOLUTION: A lower fixing section has transfer paper and a transfer paper conveying part. An upper movable section has an image forming apparatus. This lower fixing section is connected with the upper movable section on a shaft. Thereby, if transfer paper jams, a paper feed path is opened by one touch operation, thereby facilitating the removal of the jam. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

Technology field

  The present invention relates to an image forming apparatus such as a copying machine or a printer applied to an electrophotographic system.

  Electrophotographic photocopiers, printers, etc. have been on the market for a considerable period of time, during which technical progress is fast and there is almost no problem other than paper jam. Therefore, replacement of consumables and the like has been performed by an operator in the past, but especially for a small printer or the like, it is necessary to perform transportation problems as efficiently as possible considering the method to be performed on the factory side including maintenance.

  In the market, image forming apparatuses, toner, and the like are sold as consumables, and the consumables are recycled and each manufacturer disassembles and reuses them.

  In this way, if the main part is reused as a consumable item, it is economically advantageous for the user to perform the entire printer in the factory. There are various methods for distribution channels even if the same factory is used.

  For that purpose, an efficient packing method is required first.

Hereinafter, a description will be given with reference to FIG. In FIG. 1, A is a lower fixed part and B is an upper movable part.
The lower part A is provided with a paper feeding unit 1 provided with paper feeding and a transfer paper conveying part 2, and the upper movable part B is provided with image forming devices 4, 5, 6, 7 and LED exposure devices 8, 9, 10, 11 A few mm thick air is contained in the paper feed path between the movable part B and the lower fixed part A to protect the main part and to prevent slight toner leakage near the lower part of the photosensitive drum of the image forming layer apparatus. Special protective paper 12 was put. This can provide an efficient packing method.

JP 7/72777 A JP-A-9-43912 JP-A-11-174744 Japanese Patent Laid-Open No. 11-174879 JP-A-11-327218 JP 11-327220 A Japanese Patent Application No. 2004-303549 Japanese Patent Application No. 2005-269085 Japanese Patent Application No. 2007-24815

  The conventional image forming apparatuses described above have the following problems.

  The present invention is intended to solve the problems of such a conventional configuration, and an object of the present invention is to perform jam processing very quickly from an image forming apparatus.

  In order to achieve the above object, the present invention includes a paper feed unit and a transfer paper transport unit provided with a paper feeding device in the lower fixed part, and an image forming device and an LED exposure device <or laser ROS> in the upper movable unit. Opening and closing is facilitated by being connected with an axis outside the paper feed transport path that is transported to the U-shape by the paper transport device and fed into the transfer paper transport unit and below the paper feed surface. .

  When jam processing can be performed without any problem, replacement of consumables and the like has been performed by a user in the past. In particular, a small printer or the like may be a method that is performed on the factory side including maintenance. It is therefore necessary to carry out transportation problems as efficiently as possible.

  In the above, air of several millimeters in thickness is used to protect the main part in the sheet feeding / conveying path of the upper movable part and the lower fixed part and to prevent slight toner leakage in the vicinity of the lower part of the photosensitive drum of the image forming apparatus. Easy to put special protective paper.

  In this way, if the main part is reused as a consumable item, it is more efficient and economical for the user to perform the entire printer itself at the factory. There are various ways of distribution even if the same factory is used.

  As described above, the image forming apparatus of the present invention can be widely used from a single color machine to a full color machine, from a small machine to a large machine.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  A conventional image forming apparatus will be described with reference to FIG. The transfer paper 11 is sent by the transfer paper feed rollers 13 and 14 sent from the transfer paper feed roller A12 and sent to the internal conveyance section C. The main components of the internal conveyance section C are composed of a conveyance belt roller A, a conveyance belt roller B17, and a pressure roller 18, and the transferred transfer paper is transferred by the transfer paper pressing roller 15 to the image forming apparatus A (red) and the image forming apparatus B < The pressure roller 18 presses the photosensitive drum in the image forming apparatus from the back of the belt, is fixed to the transfer paper by the transfer paper fixing roller 22 and the pressure roller 23, and is discharged by the paper discharge rollers 24 and 25. When a power failure or jam occurs, it is necessary to open the upper cover E, remove the LED exposure device 6 and the image forming devices A and B, and remove the transfer paper. When the transfer paper is coming out at the fixing unit, the pressure roller 23 is opened by opening the side cover 33. <Not shown> The transfer paper can be pulled out, but the end of the transfer paper is still in contact with the photosensitive drum. Life will be shortened.

  FIG. 2 shows the transfer of the transfer paper 11 as shown in FIG. 1 except that the lower fixing unit 300 includes a paper feeding unit 301 and a transfer paper transport unit 302 provided with a paper feeding device, and the upper movable unit 303 includes an image forming device 304. 305, 306, 307, LED exposure device <or leather ROS> 308, 309, 310, 311 and operation unit 312, each of which is conveyed to a U-shape by a sheet feeding unit 301 equipped with a paper feeding device, and a transfer paper conveyance unit A shaft 313 is provided and connected to the outside of the paper feed conveyance path sent to 302 and below the paper feed surface.

  FIG. 3 assumes a case where a power failure and a jam occur. In the conveyance path from the entrance to the exit of the transfer paper 314, the lower part of the conveyance path excluding the fixing unit is an integrated structure, so the upper movable part 303 is opened and closed. By doing so, the jam processing can be easily performed.

  FIG. 3 relates to the opening and closing of the paper feed path, and the transfer paper narrow portion of the fixing device can also be opened and closed.

  FIG. 4 shows that when the upper movable portion 303 is opened, the lower guide 357 and the upper guide 368 are prevented from directly touching the surfaces of the heat fixing roll 350 provided in the upper movable portion 303 and the pressure roller 356 provided in the lower fixed side plate 361. Jam processing can be performed easily by covering automatically.

  FIG. 5 shows a state in which the upper movable portion 303 is opened. A state in which the upper guide 368 and the lower guide 357 cover the surface of the heat fixing roll 350 provided in the upper portion and the surface of the pressure unit provided in the lower fixing portion 300.

  In FIG. 6, only the toner cartridge 369, the toner waist bottle 370, and the belt toner waist bottle 371 that are frequently used are easily replaced. In addition, each image forming apparatus 304, 305, 306, 307, etc. can be prevented from being touched by an operator, and only the factory side can be opened / closed, and screws 372 (including special screws) necessary for opening / closing, etc. Is sealed with a sealing material 373, and this sealing material 373 is used as a cautionary note.

  FIG. 7 shows that replacement of the image forming apparatuses 304, 305, 306, and 307 including the toner cartridge 369, the toner waist bottle 370, and the belt toner waist bottle 371, which are frequently performed, is necessary for the opening and closing of the factory. Screws 372 (including special screws) and the like are sealed with a sealing material 373, and this sealing material 373 is used as a cautionary note.

  8 and 9 show that the user <or agent> performs maintenance using the packing material 374 designated by the manufacturer <or factory> or the sales company when the factory side and this related company perform maintenance etc. (including the recycling method). Is placed in the paper feed path.

FIG. 10 shows the state of use. The upper guide 368 shown in FIG. 10 is located above the heat fixing roll by the rack A 352 provided in the rack box 351 and the rack gear 353 at the center of the heat fixing roller 350, and is in an open state (FIG. 11). Rotate clockwise. The purpose of the stay 355 is to open the peeling claw 354 in contact with the heat fixing roll 350 in an open state (FIG. 11). In the present situation, it is not in contact with the peeling claw 354 but is regulated and pressed by the upper guide 354. The lower guide 357 can be operated by a rack gear 358 and a rack B359 at the center of the pressure roller 356, and the rack A352 and the rack B359 are connected by springs 375 and 376, respectively. In FIG. 10A, the operation of the upper guide 368 and the lower guide 357 uses a sector gear A 377 and a sector gear 378 instead of the rack A 352 and the rack 359. The sector gear A377 is engaged with the upper movable portion 303 by a spring 379, and is received by a receiving metal fitting A380 from the lower fixed portion.
The sector gear B378 is engaged with the lower fixed portion 300 by a spring 381, and is received by the receiving metal fitting B382 from the upper movable portion 303.

  FIG. 11 shows a state in which the upper movable portion 303 is opened. When the upper movable portion 303 is opened, the rack A 352 and the rack B 359 are actuated by the rack springs 375 and 376, and the upper guide 354 covers the heat fixing roller 350 and the stay 355 regulated by the upper guide 368 is released and the spring 360 is released. The upper peeling claw 354 is separated from the upper heating roller 350.

  The pressure roller 356 is attached to the lower movable side plate 362 via a bearing, and the lower movable measuring plate 362 is supported by the lower fixing fixed side plate 361 by a fulcrum shaft 363 and a pressure spring 364, and the vertical movable range is clawed by the lower movable side plate 362. 366 is regulated by the elongated hole 383 of the lower fixing fixed side plate 361.

  When the upper movable portion 303 in FIG. 11 is opened from the use state in FIG. 10, the pressure roller 356 being pressed by the heat fixing roller 350 is moved upward about the fulcrum shaft 363 by the pressure spring 364. Thus, the lower peeling claw 367 can be separated from the pressure roller 356 by the shaft 365 fixed to the lower fixing fixing side plate 361.

  As described above, the image forming apparatus according to the present invention is used for a full-color printer because the jam processing, which is the basis of the image forming apparatus, is extremely simplified. Can be used widely for full color machines.

  FIG. 1 shows a conventional image forming apparatus.   Image forming apparatus 1 showing an embodiment of the present invention   Image forming apparatus 2 according to an embodiment of the present invention   Image forming apparatus 3 according to an embodiment of the present invention   Image forming apparatus showing an embodiment of the present invention, part 4   Image forming apparatus 5 showing an embodiment of the present invention   Image forming apparatus 6 showing an embodiment of the present invention   Image forming apparatus 7 according to an embodiment of the present invention   8 is an image forming apparatus illustrating an embodiment of the present invention.   Image forming apparatus 9 according to an embodiment of the present invention   Image forming apparatus 10 according to an embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum axis | shaft 19 Fixed metal fitting 2 Photosensitive drum 20 Spring 3 Supporting shaft 21 Drive motor 4 Side plate A 22 Fixing roller 5 Side plate B 23 Pressure roller 6 LED exposure apparatus 24 Paper discharge roller 7 Developing device 25 Paper discharge roller 7-1 Development roller 30 Magnet 7-2 Developing roller blade 31 Fixed stopper 7-3 Toner supply roller 32 Iron piece 7-5 Toner cartridge 23a Pressure unit 8 Charging roller H Receiving unit 9 Cleaning device 34 Upper shaft 9-1 Cleaner blade 35 Center shaft 9- 2 Waist toner feed shaft 36 Lower shaft 9-3 Toner prevention blade 37 Support spring 10 Eraser lamp 38 Fixed shaft A Image forming device <red> 39 Pressure spring B Image forming device <black> 40 Pressure roller A
C Internal conveying part 41 Pressure roller B
D Conveying belt 42 Pressurizing spring E Upper cover 43 Pressure adjusting screw F U groove 44 Support point G U groove 45 Intermediate shaft 11 Transfer paper 46 Stay 12 Transfer paper feed roller A 47 Arm stay 13 Transfer paper feed roller B 48 Arm a
14 Transfer paper feed roller C 49 Arm b
15 Transfer paper pressing roller 16 Conveyor belt roller A
17 Conveyor belt roller B
18 Pressure roller 300 Lower fixing part 366 Claw 301 Paper feeding part 367 Lower peeling claw 302 Transfer paper transport part 368 Upper guide 303 Upper movable part 369 Toner cartridge 304 Image forming apparatus 370 Toner waist bottle 305 Image forming apparatus 371 Belt toner waist bottle 306 Image forming device 372 Screw <Opening and closing only>
307 Image forming apparatus 373 Sealing material 308 LED exposure apparatus 374 Packing material 309 LED exposure apparatus 375 Rack spring 310 LED exposure apparatus 376 Rack spring 311 LED exposure apparatus 377 Fan-shaped gear A
312 Operation section 378 Fan-shaped gear B
313 Shaft 379 Spring 314 Transfer paper 380 Receptacle A
315 Fixing device 381 Spring 350 Thermal fixing roll 382 Receptacle B
351 Rack box 383 Long hole 352 Rack A
353 Rack gear 354 Peeling claw 355 Stay 356 Pressure roller 357 Lower guide 358 Rack gear 359 Rack B
360 Spring 361 Lower fixed side plate 362 Lower movable side plate 363 Support shaft 364 Pressure spring 365 Axis

Claims (10)

The lower fixed part is provided with a paper feeding unit and a transfer paper conveying part, and the upper movable part is provided with an image forming device and an LED exposure device <or laser ROS>, respectively, and is conveyed in a U shape by the paper feeding device. An image forming apparatus, characterized in that the image forming apparatus is connected to an outer side of a paper feed conveyance path that is fed into a transfer paper conveyance unit and has a shaft below a paper feed surface. An image forming apparatus according to claim 1, wherein the sheet feeding path is opened and closed with one touch. Corresponds to the image forming device, LED exposure device <or laser ROS> and heat fixing roll in the upper movable part, and the paper feeding unit, transfer paper transport part, and the above heat fixing roll with the paper feeding device in the lower fixed part A pressure unit (a pressure roll with a heat source, a pressure roll with a pressure belt heat source, a pressure belt, etc.), which is conveyed from the paper feeding device to a U shape and sent to the transfer paper conveyance unit. An image forming apparatus, characterized in that it is connected with a shaft outside the paper feed conveyance path that is inserted and below the paper feed surface. In the apparatus, when the upper movable part is opened, the guide automatically covers the heat fixing roll provided in the upper movable part and the surface of the pressure part provided in the lower fixed part so as not to be directly touched. An image forming apparatus. An image forming apparatus according to claim 1, wherein the narrower portion of the transfer sheet of the fixing device is also opened and closed in association with the opening and closing of the paper feed path. 2. An image forming apparatus according to claim 1, wherein the upper movable portion is provided with an operation portion and is efficiently integrated. An image forming apparatus according to claim 1, wherein only the toner cartridge and the toner waist bottle are easily replaced. An image forming apparatus for facilitating replacement of image forming apparatuses each including a toner cartridge and a toner waist bottle. In the above apparatus, the user cannot replace the image forming apparatus including the toner cartridge and the toner waist bottle, and the factory side seals the opening and closing screws necessary for the replacement with a sealing material. An image forming apparatus for displaying. In the above apparatus, when the factory side performs reproduction processing or the like, the user makes a reproduction request using a packing material designated by a manufacturer or a sales company.

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