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41. 发明专利

JP2002247298A METHOD FOR CONTROLLING DRIVING OF SCANNER UNIT 失效
公开(公告)号：JP2002247298A
公开(公告)日：2002-08-30
申请号：JP2001036967
申请日：2001-02-14
申请人： SHARP KK
发明人： IEMURA HIROTOSHI , KIMURA MASAHARU , YOSHIKAWA HIDEO , KANEKO HIDETOSHI , KUBO TAKASHI
IPC分类号： H04N1/04
摘要： PROBLEM TO BE SOLVED: To prevent deviation of the moving amount of a scanner unit and to always and precisely read an original image by the scanner unit when a rocking is occurred in a copying device main body by torque at the time of acceleration when a carriage reciprocates in an image forming part. SOLUTION: In areas (between O and P, between Q and R, between S and U, between V and W and between X and Y) where the moving speed of the carriage 21 changes, a current value to a scanner motor M1 is raised from (i) to I, and the torque of the scanner motor M1 is increased. Thus, the moving quantity of the scanner unit 12 is not deviated in the scanner unit 12 due to the rocking occurred in the upper part of the copying device 10 by the reciprocation of the carriage 21, and the forming state of a copied image is not affected even if the reading processing of the original image is simultaneously performed in an original reading part 1 during forming process of an image in the image forming part 2.

42. 发明专利

JP2002229133A SUPPORT STRUCTURE OF SCANNER UNIT 失效
公开(公告)号：JP2002229133A
公开(公告)日：2002-08-14
申请号：JP2001026927
申请日：2001-02-02
申请人： SHARP KK
发明人： YOSHIKAWA HIDEO , KANEKO HIDETOSHI , MORIMOTO AKINORI , IEMURA HIROTOSHI , KUBO TAKASHI , MURAI HIROYUKI , ISHII HIROSHI , NAGAI YOSHIYUKI , TANAKA TOMOYOSHI
IPC分类号： G03G15/00 , G03B27/50 , G03F1/00 , H04N1/00 , H04N1/04
摘要： PROBLEM TO BE SOLVED: To provide a support structure of scanner unit which prevents vibrations of a scanner unit when the vibrations are generated on an image forming device main body and can precisely read an image of original by means of the scanner unit. SOLUTION: A bearing 16 is disposed on the front side of a scanner unit 12 and a first guide shaft 14a is penetrated through the bearing 16. A support part 15 is extended to the back surface side of the scanner unit 12 and a braking member 17 is stuck on the bottom surface of the support part 15. The support part 15 is brought into contact with the upper part of a second guide shaft 14b across the braking member 17 by the own-weight. The braking member 17 is elastically contracted by the pressing with the second guide shaft 14b and is brought into contact with the second guide shaft 14b in a prescribed nip width b. When the vibrations are generated on an original reading part 1 which is positioned on the upper part of the image forming device 10, as soon as the back surface side begins to vibrate with respect to the second guide shaft 14b by centering the front surface side, the braking force for the vibration movement is operated by the braking member 17 and the scanner unit does not cause vibrations.

43. 发明专利

JPH0761628A PAPER FEEDING AND CARRYING DEVICE 失效
公开(公告)号：JPH0761628A
公开(公告)日：1995-03-07
申请号：JP15220293
申请日：1993-06-23
申请人： SHARP KK
发明人： KANEKO HIDETOSHI , MATSUDA HIDEO , MASUDA YOSHIAKI , OGIDA TOSHIKI
IPC分类号： B65H3/06 , B65H3/54 , G03G15/00
摘要： PURPOSE:To prevent the oblique feed of a paper sheet and obtain a copy image of high quality by providing a load application means at a position off a feed roller over the predetermined distance toward an upstream direction, and off a sheet reference point with one end of the sheet taken as reference for applying a load to the upper surface thereof in contact state. CONSTITUTION:A plate type weight 29 strengthens the flexibility of a thin film sheet 30, and has such length as prohibiting the turning motion thereof between a paper guide (upper) 10 and a paper guide (lower) 11. The weight 29 is pasted to the sheet 30 with a pressure sensitive adhesive, while one end of the sheet 30 is pasted and fixed to the paper guide (upper) 10 with a pressure sensitive adhesive, thereby holding the weight 29. In this case, a gap between the end of the weight 29 and the curled section of the sheet 30 is formed to be minimum possible for allowing the smooth vertical travel of the weight 29. According to this construction, the weight 29 can be prevented from being pulled outside, when a sheet is drawn out at the time of the occurrence of a jam.

44. 发明专利

JPH06247573A PAPER FEED DEVICE 失效
公开(公告)号：JPH06247573A
公开(公告)日：1994-09-06
申请号：JP3335893
申请日：1993-02-23
申请人： SHARP KK
发明人： TAKAHIRA HIROSHI , KANEKO HIDETOSHI , KONO SATOSHI , KUBO TAKASHI , MASUDA YOSHIAKI , KAWAI YASUTOSHI
IPC分类号： B65H3/06 , G03G15/00
摘要： PURPOSE:To transport a paper sheet only by means of a paper feed roller so as to prevent dispersion of transport. CONSTITUTION:A semicircular paper feed roller 32 is rotated at the nearly same speed as the rotating speed of a photosensitive body 5. The circunferential length of the paper feed roller 32 is set longer than the length of a transport passage 31. During one rotation of the paper feed roller 32, a paper sheet 22 is transported to the photosensitive body 5. When the paper feed roller 32 is stopped, the paper sheet 22 is brought in contact with a paper sheet transport assisting body 33 in the transport passage 31. The paper sheet 22 is smoothly transported without any resistance.

45. 发明专利

JPH06202516A OIL APPLYING DEVICE FOR FIXING DEVICE 失效
公开(公告)号：JPH06202516A
公开(公告)日：1994-07-22
申请号：JP30090692
申请日：1992-11-11
申请人： SHARP KK
发明人： ONO YASUHIRO , OGIDA TOSHIKI , KANEKO HIDETOSHI , KUBO TAKASHI
IPC分类号： G03G15/20
摘要： PURPOSE:To uniformly apply (supply) an offset preventive liquid to the surface of a fixing roller. CONSTITUTION:Liquid drops 36 of silicone oil (offset preventive liquid) are ejected from an ejection head part 33 which is made to travel along two pieces of guide rails 31 disposed in the rotating axis direction of the upper fixing roller 22 of a fixing device 20 opposite to the fixing roller 22 in order to apply the silicone oil to the fixing roller. These liquid drops are supplied and applied to the surface of the upper fixing roller 22. The liquid drops 36 are ejected to the upper fixing roller 22 during traveling of the carriage 32, by which the specified amt. of the silicone oil is stuck to the surface of the upper fixing roller 22 and an oil film is formed on the surface of the upper fixing roller 22. The silicone oil is stored in a tank part 35 and is supplied via an oil supply part 34 to the ejection head part 33.

46. 发明专利

JPH0651663A FIXING DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH0651663A
公开(公告)日：1994-02-25
申请号：JP20802892
申请日：1992-08-04
申请人： SHARP KK
发明人： ONO YASUHIRO , MATSUDA HIDEO , KANEKO HIDETOSHI , MASUDA YOSHIAKI
IPC分类号： B65H29/20 , G03G15/00 , G03G15/20
摘要： PURPOSE:To enable smooth copying in either case of selecting black-and-white copying, or selecting full-color copying by making angles for inserting sheets from respective upper and lower fixing parts to paper ejecting rollers equal. CONSTITUTION:The rollers are arranged so that the bisector 214 of an internal angle gamma made by a straight line between the center point 201a of an upper heat roller 201 and the center point 202a of an intermediate heat roller 202 and a straight line between the center point 202a of the intermediate heat roller 202 and the center point 203a of a lower heat roller 203 may be overlapped on a tangent line 30b at the abutting part 30a of the paper ejecting rollers 30. Then, the paper insertion angle alpha becomes equal to the paper insertion angle beta. The sheet ejected from the upper fixing part 212 and the sheet ejected from the lower fixing part 213 can be inserted at the equal angle with reference to the tangent line 30b of the abutting part 30a of the paper ejecting rollers 30. Thus, the occurrence ratios of paper jamming by the sheets ejected from respective fixing parts 212 and 213 and near the paper ejecting rollers 30 are made equal.

47. 发明专利

JPH0627842A ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH0627842A
公开(公告)日：1994-02-04
申请号：JP17856492
申请日：1992-07-06
申请人： SHARP KK
发明人： KUBO TAKASHI , MATSUDA HIDEO , OGIDA TOSHIKI , KANEKO HIDETOSHI
IPC分类号： G03G15/00 , G03G15/01 , G03G15/20 , G03G21/00
摘要： PURPOSE:To take an optimum fixing action for a full color image and a black- and-white image, without complicatedly controlling a fixing device by controlling so as to first, form a monochrome image on one surface of a sheet at the time of taking a monochrome/full color both-side image forming action, and then, the full color image on the other surface. CONSTITUTION:When a black-and-white/full color both-side copy is selected by a copy selecting key, and then, a copy starting button is turned on, a black- and white copy is made on one surface of the form, and then, a full color copy is made on the other surface of the form. At this time, in the fixing device 200, a fixing action in the full color copy is taken in an upper fixing part between an upper heating roller 201 and a middle heating roller 202, and the fixing action in the black-and-white copy is taken in a lower fixing part between the middle heating roller 202 and a lower heating roller 203. Thus, the fixing conditions of the upper and lower fixing parts can be set according to the black-and-white and full color copies, respectively and independently.

48. 发明专利

JPH05249856A 失效
公开(公告)号：JPH05249856A
公开(公告)日：1993-09-28
申请号：JP5176292
申请日：1992-03-10
申请人： SHARP KK
发明人： MATSUDA HIDEO , OGIDA TOSHIKI , KUBO TAKASHI , MASUDA YOSHIAKI , YOSHINAKA SHUICHI , KANEKO HIDETOSHI , ONO YASUHIRO , KAWAI YASUTOSHI
IPC分类号： G03G15/01 , G03G15/20
摘要： PURPOSE:To simplify the structure of a member disposed on the outside circumference of a heat roller, to prolong the life of the heat roller and to reduce a running cost accompanied with it. CONSTITUTION:A first fixing part is formed at the press-contact part of the upper heat roller 201 and the intermediate heat roller 202 and a second fixing part is formed at the press-contact part of the roller 202 and the lower heat roller 203. Then, a sheet on which an unfixed toner image is formed is carried to the first fixing part and the second fixing part from a sheet carrying device. The roller 202 is held so as to be made to press-contact with the upper or the lower roller 201 or 203. At this time, the left heat roller other than both heat rollers which are made to press-contact with each other is separated from the roller 202.

49. 发明专利

JPH05134566A ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH05134566A
公开(公告)日：1993-05-28
申请号：JP29423491
申请日：1991-11-11
申请人： SHARP KK
发明人： KUBO TAKASHI , YOSHINAKA SHUICHI , KANEKO HIDETOSHI , KAWAI YASUTOSHI
IPC分类号： G03G15/16
摘要： PURPOSE:To suppress transfer failure by preventing paper from being obliquely feeded, etc. CONSTITUTION:In a full color copying machine, top side and bottom side resist rolls 26a and 26b to match a leading tip of the paper 15 fed from feeding rolls 23 and 23 and a transfer roll 27 to pressurize the paper 15 and and an intermediate transfer belt 12 to transfer an image on the intermediate transfer belt 12 are attached to the same unit frame 25 of a roll transfer device 24. Therefore, operations such as cleaning and exchange of the top side and bottom side resist rolls 26a and 26b can be carried out easily and thus, the maintenance function of the full color copying machine can be improved. Furthermore, relative positioning of the transfer roll 27 and the top side and bottom side resist rolls 26a and 26b can be carried out well.

50. 发明专利

JPH0561373A TRACKING CORRECTING DEVICE FOR BELT 失效
公开(公告)号：JPH0561373A
公开(公告)日：1993-03-12
申请号：JP22179191
申请日：1991-09-02
申请人： SHARP KK
发明人： KAWAI YASUTOSHI , ONO YASUHIRO , MASUDA YOSHIAKI , YOSHINAKA SHUICHI , KANEKO HIDETOSHI
IPC分类号： B65H5/02 , G03G15/00 , G03G15/20
摘要： PURPOSE:To prevent the deterioration of image quality accompanied with the correction of the tracking of a fixing belt. CONSTITUTION:An entrance side sensor S1 is arranged on the entrance side of a belt fixing device, and a paper electing sensor S2 is arranged at the ejecting position of a fixing part. On the other hand, a tracking detecting sensor 30 detecting the tracking of a belt 10 is arranged on a turning plate 17 supporting the part of the downstream side of the belt 10. Detecting signals from these sensors S1, S2 and 30 are given to a CPU 60, and when the CPU 60 is located in the entrance and exit sides of the fixing part of a form 20, that is, during a nonfixing action, a tracking correction executing/commanding signal is issued to a belt driving mechanism 61, to correct the tracking.

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