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1. 发明专利

JPH06348078A POWER FEEDING SYSTEM FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH06348078A
公开(公告)日：1994-12-22
申请号：JP13483593
申请日：1993-06-04
申请人： HITACHI KOKI KK
发明人： HONDA TAKEHIRO , YOKOGAWA HIDEHO , NAKAJIMA ISAO
IPC分类号： G03G15/20 , G03G15/00
摘要： PURPOSE:To provide a power feeding system which can be easily changed just by replacing only a power source device without changing connection even when the power feeding system for an electrophotographic device is changed. CONSTITUTION:The power source device for a three-phase and three-wire system 1 and the power source device for a three-phase and four-wire system are connected to have the identical number of terminals in a terminal block 3. Besides, a terminal block 6 provided with interchangeability for both the power source device for a three-phase and three-wire system 1 and the power source device for a three-phase and four-wire system is provided on the input side of a relay box 4.

2. 发明专利

JPH0262372A PAPER FOLDING FAILURE DETECTOR 失效
公开(公告)号：JPH0262372A
公开(公告)日：1990-03-02
申请号：JP21269888
申请日：1988-08-26
申请人： HITACHI KOKI KK
发明人： HONDA TAKEHIRO , HIRASAWA MASAHIRO , TSUCHIYA KIYOMI , KIKUCHI YASUO , OGAWA TOSHITAKA , NAMIKAWA OSAMU , SHIRAKAWA JUNJI
IPC分类号： B65H45/101
摘要： PURPOSE:To keep off any false detection of a paper folding failure due to flapping of printing paper by lowering a table once as far as the specified extent and making the paper folding failure so as to be redetected when the printing paper has come to leave an interspace between a light emitter and a light receiver of a paper folding failure detector intercepted intact. CONSTITUTION:In the case where printing paper 101 being fed out of an upper part has come to leave light between a light emitter 104 and a light receiver 105 intercepted intact, a fact that if a table 106 is lowered as far as the specified extent, the printing paper 101 intercepting the space between the light emitter 104 and the light receiver 105 is dropped and thereby light of the emitter 104 is incident on the light receiver 105 is eyed, so that in this case, the table 106 is once lowered as far as the specified extent, and a paper folding failure is redetected. In consequence, any false detection of the paper folding failure is preventable.

3. 发明专利

JPH09325660A CLEANING DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH09325660A
公开(公告)日：1997-12-16
申请号：JP14382796
申请日：1996-06-06
申请人： HITACHI KOKI KK
发明人： HONDA TAKEHIRO , TAKANO MASAHARU , OGAWA TOSHITAKA
IPC分类号： G03G21/10
摘要： PROBLEM TO BE SOLVED: To decrease the cost by reducing the number of parts in the unit of the cleaning device of an electrophotographic device. SOLUTION: Untransfered toner 2 remaining on the photoreceptor 1 of the electrophotographic device is electrostatically attracted by a conductive brush 3 having a bias voltage V1. A bias voltage V2 is applied to the conductive brush contact part of a screw rotary body 4, so that it has an electrostatic force holding potential (V2-V1) for reattracting toner captured by the electrostatic brush 3. On the sides of the conductive brush contact part and diagonal position of the rotary body 4, a bias potential is made 0V, that is, connection to the ground with respect to the bias potential is attained. The screw rotary body 4 electrostatically attracts the toner of the conductive brush 3 in the conductive brush contact part. On the other hand, the electrostatically attracted toner is electrostatically released at the nearly diagonal position of the conductive brush contact part. The released toner is discharged to a recovering part, side by making use of the rotational force of the screw rotary body 4.

4. 发明专利

JPH0954512A FIXING DEVICE 失效
公开(公告)号：JPH0954512A
公开(公告)日：1997-02-25
申请号：JP20584395
申请日：1995-08-11
申请人： HITACHI KOKI KK
发明人： TAKAYASU HIDENORI , YOKOGAWA HIDEHO , NAKAJIMA ISAO , AIDA SATOSHI , HONDA TAKEHIRO , SHIRATA HIROSHI
IPC分类号： G03G15/20 , B05C1/08 , B05C1/14 , B05D3/00
摘要： PROBLEM TO BE SOLVED: To keep the feeding speed of a belt-like body constant, to use the belt-like body having the same length as a conventional length for a long period and to reduce a cost by providing a detecting means detecting the rotational speed of the internal belt-like body feeding roll of a pair of rolls holding the belt-like body and controlling the feeding speed of the belt-like body, based on the output of the detecting means. SOLUTION: A rotational speed detector 16 detecting the rotational speed is provided on a felt subsidiary roll 13. At this time, the rotational speed detector 16 is composed of a photocoupler 17 and a sensor plate 18. The sensor plate 18 is in such a shape that one pulse is generated for every one rotation of the felt subsidiary roll 13. The generation period of the pulse is measured to detect the rotational speed of the felt subsidiary roll 13. Since the rotational speed of the roll 13 is detected by the rotational speed detector 16, the rotational speed of a stepping motor 15, that is, the rotational speed of a felt main roll 14 is controlled with the detected rotational speed.

5. 发明专利

JPS63249175A FIXING DEVICE 失效
公开(公告)号：JPS63249175A
公开(公告)日：1988-10-17
申请号：JP8345387
申请日：1987-04-03
申请人： HITACHI KOKI KK
发明人： HONDA TAKEHIRO , NAMIKAWA OSAMU , TSUCHIYA KIYOMI
IPC分类号： G03G15/20
摘要： PURPOSE:To facilitate rotation and driving of a heat roll, by increasing the duty of a servo motor driving current until a heat roll driving system is sufficiently heated preparatorily. CONSTITUTION:At the time of power-on, the signal obtained by increasing the pulse width of an open rotation control signal in the open rotation state from 25% duty to 50% duty is outputted from a control circuit part 112. The open rotation control signal is outputted as a servo motor rotation control signal to a servo motor driver 111 through an OR circuit. When the heat roll reaches a control temperature, a heat roll temperature detection signal is outputted to a heat roll temperature controller 202, and this controller 202 outputs a heat roll temperature command signal to a servo motor controller 112, and the heat roll is driven with the servo motor driving current of low duty. Thus, the heat roll is easily rotated and driven even in case of a heavy load.

6. 发明专利

JPH08146073A MOUNTING CONFIRMATION METHOD OF ELECTRONIC CIRCUIT BOARD IN PRINTER 失效
公开(公告)号：JPH08146073A
公开(公告)日：1996-06-07
申请号：JP28542794
申请日：1994-11-18
申请人： HITACHI KOKI KK
发明人： HONDA TAKEHIRO , YOKOGAWA HIDEHO , AIDA SATOSHI , WATANABE ISAO
IPC分类号： G01R31/04 , G01R31/28 , G06F1/18
摘要： PURPOSE: To provide a mounting confirmation system for an electronic circuit board in a printer which can automatically confirm the erroneous connection and non-insertion of an electronic circuit board. CONSTITUTION: The respective connection terminals of AID-N or the like connected across a main control panel 7 and respective control panels 1-3 through a mother board 5 are connected to the pins of the respective control panels 1-3 in the correspondence of 1:1. The connection positions of connectors 4a, 4b, 4c with the mother board 5 are changed at every pin of the control panels 1-3 and, on the basis of the presence of the connection of the control panels 1-3, the change of the output level of a signal line is detected by the substrate connection detection control circuit 8 of the main control panels 7 to automatically perform the confirmation of the errogenous connection and non-insertion of an electronic circuit board.

7. 发明专利

JPH0830136A ELECTROPHOTOGRAPHIC DEVICE AND FIXING DEVICE USED THEREFOR 失效
公开(公告)号：JPH0830136A
公开(公告)日：1996-02-02
申请号：JP16215294
申请日：1994-07-14
申请人： HITACHI KOKI KK
发明人： WATANABE ISAO , TSUJI HOKYO , YOKOGAWA HIDEHO , OKADA KENJI , HONDA TAKEHIRO
IPC分类号： G03G21/14 , G03G15/20
摘要： PURPOSE:To provide a fixing device for an electrophotographic device capable of remarkably prolonging the motor life by eliminating the problem due to the counter electromotive force of the heat roll driving motor at the time of non-printing and to provide an electrophotographic device capable of smoothly controlling a fixing device in the series of printing operation, even the reference signal at the time of executing the printing differs at the time of non-printing. CONSTITUTION:The device is provided with the reference signal generating means 27 for generating the different referent signal at the time of executing the printing from that at the time of non-printing, the heat roll driving motor 24 rotary controlled basing on the output of the reference signal generating means, the motor speed detecting means for generating the signal basing on the rotary speed of the motor 24 and the phase shift means 31 for shifting the phase of the motor speed detecting signal at the time of non-printing, and moreover the motor 24 is rotary driven in approximately proportion to the delayed portion when the phase of the output signal from the motor speed detecting means and the phase shift signal 31 delay corresponding to the phase of the reference signal E of the non-printing time.

8. 发明专利

JPH07298482A CONTROL CIRCUIT FOT SYNCHRONOUS MOTOR 失效
公开(公告)号：JPH07298482A
公开(公告)日：1995-11-10
申请号：JP8481994
申请日：1994-04-22
申请人： HITACHI KOKI KK
发明人： AIDA SATOSHI , YOKOGAWA HIDEHO , OGAWA TSUKASA , HONDA TAKEHIRO
IPC分类号： H02H7/085 , H02H7/08 , H02P21/04 , H02P21/36 , H02P23/00 , H02P23/03 , H02P25/022 , H02P25/10 , H02P7/36
摘要： PURPOSE:To provide a synchronous motor control circuit capable of preventing overcurrent burn of motor windings. CONSTITUTION:Whether a combination of the monitor results of an output (drive frequency of a synchronous motor 4, MOTOR CLK-P) of a reference clock generating circuit 1 by a reference clock monitor portion 6 and the monitor results of an output voltage of a drive power source 2 by a drive voltage monitor portion 7 is normal, is judged by AND gate 11 and motor power feeding is turned off if the output ERR-P of the AND gate 11 indicates an abnormal state.

9. 发明专利

JPH0347773A PAPER AFTER-TREATMENT DEVICE FOR PRINTER 失效
公开(公告)号：JPH0347773A
公开(公告)日：1991-02-28
申请号：JP18345589
申请日：1989-07-14
申请人： HITACHI KOKI KK
发明人： HONDA TAKEHIRO
IPC分类号： B41J15/04 , B65H20/20 , B65H23/16 , G03G15/00
摘要： PURPOSE:To inhibit the flutterning of paper to feed the paper in a stable state by providing a rod-form member on the side of a paper after-treatment device so that it is in parallel to the folding line of the paper. CONSTITUTION:A rod-form member 9 is swingably suspended by wire materials 8 so as to be in parallel to a folding line 2a of paper. Paper 2 delivered from a paper discharge part 1a of a printer 1 abuts on the rod-form member 9 at a slack part 2c, thereby being applied with approximately a fixed load by the own weight of the rod-form member 9. Thus, the fluttering of the paper 2 accompanying the intermittent or continuous paper feed action can be prevented. On the other hand, even if the paper 2 comes to rather a tensile state in its feed action, the rod-form member 9 is pressed up by its pendulum motion without forcibly pressing down the paper 2, thus preventing the breakage of the paper.

10. 发明专利

JPH0850429A ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH0850429A
公开(公告)日：1996-02-20
申请号：JP18455394
申请日：1994-08-05
申请人： HITACHI KOKI KK
发明人： UENO HIROSHI , TSUJI HOKYO , YOKOGAWA HIDEHO , TAKAHASHI KUNITOMO , NAKAJIMA ISAO , HIROSE YOJI , TAKANO KAZUO , HONDA TAKEHIRO , AIDA SATOSHI , WATANABE ISAO , DOI KOJI , ONOSE TSUKASA , SAWAHATA AKIRA
IPC分类号： B41J15/04 , G03G15/23 , G03G21/00
摘要： PURPOSE:To eliminate the discrepancy of a printing speed in tandem printing and single printing by switching/setting the printing speed at the time of connecting plural devices and printing or independently printing. CONSTITUTION:In the tandem printing, a paper sheet fed from the electrophotographic device A of the head is turned over by a paper reversing device and a toner image is formed on the other side of the paper by the succeeding electrophotographic device B as well. In the device B, the toner images after being fixed by the device A of the head and the device B are formed on the front surfaces of the paper sheet facing a preheater and the paper sheet on the opposite side respectively. At this time, the temperature of the preheater is switched to a glass transition temp. or below, not to soften the toner image again. Therefore, printing speed switching devices are connected to the controllers 22a and 22b of the electrophotographic devices A and B respectively, to enable the printing under optimum conditions in accordance with the selection of the single printing or the tandem printing.

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