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1. 发明专利

JPH1067482A ESCALATOR DEVICE AND TREAD FOR ESCALATOR 失效
公开(公告)号：JPH1067482A
公开(公告)日：1998-03-10
申请号：JP22598697
申请日：1997-08-22
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： KOJIMA WAHEI , SAITO CHUICHI , TAKEDA KAZUTOSHI , TAMATSU TOSHIYUKI
IPC分类号： B66B29/08
摘要： PROBLEM TO BE SOLVED: To provide an escalator device, by which a large-size wheelchair or a cart can be conveyed without changing a conventional installation dimension, by means of simple constitution. SOLUTION: In an escalator device in which a wheelchair mounting face is formed of three steps 7, 8, 9 of a stairs, mechanisms 16-18, which lift treads 8F, 9F of the two lower steps 8, 9 in the adjacent three steps 7, 8, 9 toward a tread 7F of the uppermost step 7, are arranged in the stairs, while means 14, 15 suppressing inclination of the treads 8F, 9F of the two steps 8, 9 are arranged in the two steps 8, 9.

2. 发明专利

JP2513745B2 失效
公开(公告)号：JP2513745B2
公开(公告)日：1996-07-03
申请号：JP31526987
申请日：1987-12-15
申请人： HITACHI LTD
发明人： TAKEDA KAZUTOSHI , SASAKI MAMORU , YAMAMOTO TAKEKI
IPC分类号： B66B11/02

3. 发明专利

JP2507403B2 失效
公开(公告)号：JP2507403B2
公开(公告)日：1996-06-12
申请号：JP7148987
申请日：1987-03-27
申请人： HITACHI LTD
发明人： SUGAYA EIJI , UEJIMA TAKAAKI , MURAMATSU SADAO , TAKEDA KAZUTOSHI
IPC分类号： B66B13/14

4. 发明专利

JPH05246646A 失效
公开(公告)号：JPH05246646A
公开(公告)日：1993-09-24
申请号：JP24947792
申请日：1992-09-18
申请人： HITACHI LTD
发明人： HAGITANI TOMOFUMI , ONODERA MINORU , TAKEDA KAZUTOSHI
IPC分类号： B66B5/02 , B66B5/12 , B66B5/28
摘要： PURPOSE:To provide a malfunction preventing device for a rope loosening detecting switch which can improve the work in the installation of an elevator and reduce the manufacturing cost. CONSTITUTION:As for an indirect type hydraulic elevator which is constituted so that a rope loosening detecting frame 11 which serves as the suspending part for a rope 9 is installed at the lower part of a cage 2, and a rope loosening detecting switch 13 is installed at a rope suspending part, and the rope loosening detecting frame 11 is turned downward by the loosening of the rope 9, and the rope loosening detecting switch 13 operates, a seat 15 having a collar is installed in the upper part of a buffer device 10 installed in the lower part of the cage 2, and when the cage 2 reaches the buffer device 10, the downward turn of the rope loosening detecting frame 11 is prevented, and a rope loosening detecting switch is prevented from malfunctioning.

5. 发明专利

JPH05229767A POWER UNIT FOR HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH05229767A
公开(公告)日：1993-09-07
申请号：JP3038092
申请日：1992-02-18
申请人： HITACHI LTD , HITACHI BUILDING SYST ENG
发明人： SASAKI HIDEKAZU , HAGITANI TOMOFUMI , SENDA KEIICHI , TAKEDA KAZUTOSHI
IPC分类号： B66B9/04
摘要： PURPOSE:To simplify piping layout in a machine room and shorten a piping passage. CONSTITUTION:In a power unit 1, an exit 8 of pipings is provided at a center of a surrounding surface. By thus shortening a piping passage, piping construction is facilitated, and because the whole length of the pipings is also shortened, pressure loss is not increased.

6. 发明专利

JPH03106787A CONTROL DEVICE FOR HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH03106787A
公开(公告)日：1991-05-07
申请号：JP24212389
申请日：1989-09-20
申请人： HITACHI LTD
发明人： SASAKI HIDEKAZU , TAKEDA KAZUTOSHI , ARAHORI NOBORU , SANO TSUTOMU , HIMENO YOJI , NAKAMURA ICHIRO
IPC分类号： B66B1/26 , B66B9/04
摘要： PURPOSE:To perform oil temperature warming up operation without operating an elevator and to reduce a cost by a method wherein an electromagnetic switching valve is mounted on an oil pressure circuit through which the vent part of a relief valve is coupled to a tank. CONSTITUTION:An electromagnetic switching valve 8 having a check valve is located in the middle between lines 6 and 7, a relief valve 10 is located in a branch circuit 9 branched from an oil pressure circuit 6 and coupled to a tank 3, and an electromagnetic switch valve 11 is located in the vent circuit of the relief valve 10. During oil temperature warming up operation, an electric motor 2 is run simultaneously with excitation of the electromagnetic switching valve 11, and a pump 1 is run so that working oil is sucked from a tank 3 and delivered to the relief valve 10 side. Pressure oil delivered from the pump 1 passes the relief valve 10 and is returned to the tank 3. This constitution causes working oil to generate heat to perform warming up operation. Since warming up operation is practicable by using the relief valve without locating a special switching valve, a control valve is prevented from being complicated and a cost is reduced.

7. 发明专利

JPH03106779A MALFUNCTION PREVENTING DEVICE FOR ROPE SLACK DETECTING SWITCH 失效
公开(公告)号：JPH03106779A
公开(公告)日：1991-05-07
申请号：JP24216589
申请日：1989-09-20
申请人： HITACHI LTD
发明人： HAGITANI TOMOFUMI , SASAKI HIDEKAZU , TAKEDA KAZUTOSHI
IPC分类号： B66B9/04 , B66B5/12
摘要： PURPOSE:To prevent malfunction of a rope slack detecting device during rest at a lowermost floor for a long time by a method wherein at a point of time when a passenger cage is lowered down to a buffer, a plate which brings a rope slack detecting plate into an inoperative state is pressed by the buffer. CONSTITUTION:A rope slack detecting preventing plate 16 is mounted to a buffer support frame 14 by means of a hinge 15 so that, during ordinary running, a rope slack detecting frame 11 is rotated downward around a fulcrum pin 12 under gravity due to the slack of a rope 9, a margin enough for operation of a rope slack detecting switch 13 is provided and a proper distance is ensured. A buffer 10 is mounted below the rope slack detecting preventing plate. By an effect in which the rope slack detecting preventing plate 16 is pushed up in a horizontal state by the buffer 10 against natural subsidence of a passenger cage occurring during rest for a long time, the rope slack detecting frame 11 is prevented from downward rotation, and useless operation of the rope slack detecting switch 13 due to natural subsidence of the passenger cage during rest for a long time is prevented from occurring.

8. 发明专利

JPH0356374A PULSE WIDTH MODULATION CONTROLLED HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH0356374A
公开(公告)日：1991-03-11
申请号：JP19147089
申请日：1989-07-26
申请人： HITACHI LTD , HITACHI ELEVATOR ENG & SERVICE
发明人： SENDA KEIICHI , TAKEDA KAZUTOSHI , SASAKI HIDEKAZU , ANDO TAKEYOSHI
IPC分类号： B66B1/04
摘要： PURPOSE:To lessen the action delay of a solenoid coil current to signals during the action of pilot valves and enlarge the effective region of a pulse width modulation rate by providing detectors for detecting the solenoid coil current and returning the solenoid coil current to solenoid coil current controllers, thus controlling the solenoid coil current. CONSTITUTION:During pulse width modulating action, ascending pilot valves 6, 7 perform the feedback control of the solenoid coil current of solenoid coils 6', 7' detected at solenoid coil current detectors 12', 13'. With such feedback control, the rising delay of the solenoid coil current to signals is lessened, and the change in action delay due to the fluctuation of solenoid coil voltage becomes less, as well as the effective range of a modulation rate is enlarged.

9. 发明专利

JPH0346976A FLOOR POSITION CORRECTING DEVICE FOR HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH0346976A
公开(公告)日：1991-02-28
申请号：JP17813689
申请日：1989-07-12
申请人： HITACHI LTD
发明人： SASAKI HIDEKAZU , HAGITANI TOMOFUMI , TAKEDA KAZUTOSHI , ARAHORI NOBORU , MASUDA KATSUTARO , NAKAMURA ICHIRO
IPC分类号： B66B1/04 , B66B1/44 , B66B9/04
摘要： PURPOSE:To correct the floor position of a cage easily by driving a sub-pump every time the cage stops and feeding delivery oil into a hydraulic jack or lowering the pressure in the hydraulic jack by a switching valve according to the stop position of the cage. CONSTITUTION:A hydraulic jack 6 is connected from a suction filter 3 in an oil tank 1 through a sub-pump 1, a duct 9, a check valve 4 and a duct 10. Every time a cage stops, the sub-pump 1 is operated to detect (12) the displacement of a cage 5 by a rope 18 and a pulley 19 and input it into a control device 16. When the cage 5 stops lower than the specified position, a switching valve 7 between the duct 9 and the oil tank 11 is operated by the output signal 15 of the control device 16 so as to feed oil pressure into the jack 6 through the check valve 4, thus moving the cage up. When the cage 5 is displaced higher, a switching valve 8 between the duct 10 and the oil tank 11 is controlled (14) to return oil into the tank 11. The stop position of the cage 5 is thereby corrected to the normal level without time delay.

10. 发明专利

JPH028185A JACK FOR HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH028185A
公开(公告)日：1990-01-11
申请号：JP15676788
申请日：1988-06-27
申请人： HITACHI LTD , HITACHI ELEVATOR ENG & SERVICE
发明人： SASAKI HIDEKAZU , TAKEDA KAZUTOSHI , MASUDA KATSUTARO , NAKADA TSUGUHIKO
IPC分类号： B66B9/04
摘要： PURPOSE:To facilitate the joint work of a plunger by jointing a divided plunger by the recessed fitting type joint having a shrink range in the title jack having a divided plunger. CONSTITUTION:A male joint 2 is welded to the lower part of an upper plunger 1 and a female joint 4 is respectively formed at the upper part of a lower plunger 3. The outer diameter of the male joint 2 is set in the shrink range slightly larger than the inner diameter of the female joint 4. In case of connecting the upper and lower plungers 1 and 3 the male joint 2 is fitted into the female joint 4, piercing is executed on the plunger side face and a pin 5 is driven, then the plunger surface is made smooth. Or, the diameter is enlarged by heating the female joint 4 side by a heater, the male joint 2 is fitted in and cooled. Consequently the joint work of the upper and lower plunger becomes easy.

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