专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 发明专利

JPH0441375A FLUID PRESSURE ELEVATOR 失效
公开(公告)号：JPH0441375A
公开(公告)日：1992-02-12
申请号：JP14626190
申请日：1990-06-06
申请人： HITACHI LTD
发明人： NAKAMURA ICHIRO , WATANABE HARUO , SHUDO KATSUHARU , SASAKI HIDEKAZU
IPC分类号： B66B1/40 , B66B1/04 , B66B1/44 , B66B9/04
摘要： PURPOSE:To improve the cage position control precision by compensating flotation of a cage by feedback control pf a quantity of pressure fluid supplied to or discharged from a fluid pressure cylinder by a signal generated corresponding to fluctuation of flotation when the cage is stopped. CONSTITUTION:A position compensating device 3 is composed of a fluid pressure source comprising a pump 31a, an accumulator 35, a pressure switch 36, etc., and control valves 30a, 30b. The accumulator 35 accumulates high pressure fluid from the pump 31a for an auxiliary fluid pressure souce to supply a large flow instantaneously. A control device 37 accumulates pressure fluid at more than a predetermined pressure in the accumulator 35 by a signal from the pressure switch 36, detects the position of a cage 10, supplies pressure fluid at the control valve 30a to a cylinder 1 or discharges pressure fluid at the control valve 30b from the cylinder 1 in comparison to the quantity of sedimentation or flotation of the cage 10, and compensates the position of the cage 10. The position of the cage 10 can thus be controlled at a good precision.

62. 发明专利

JPH03204489A MULTISTAGE VALVE 失效
公开(公告)号：JPH03204489A
公开(公告)日：1991-09-06
申请号：JP48290
申请日：1990-01-08
申请人： HITACHI LTD
发明人： SHUDO KATSUHARU , NOGAMI TADAHIKO , NAKAMURA ICHIRO , MAENO ICHIRO , SHIMOGAMA HIRONORI
IPC分类号： F16K31/122
摘要： PURPOSE:To enhance precision of control and miniaturize a device by directly rotating a valve element with electromagnetic force, allowing the valve element and a casing to perform relative motion, and controlling flow of fluid. CONSTITUTION:When the valve element 1 of a pilot valve rotates so that the supply port 54 of a main valve and the control port 22 of the pilot valve are connected, fluid enters a pressure chamber 64. Also, when the valve element 1 rotates in the reverse direction, the port 54 connects with the control port 23 of the pilot valve, and fluid enters into a pressure chamber 65. A main valve spool 50 moves to the direction of an arrow 75 when fluid acts on the pressure chamber 64, and opens control orifices 73, 74, when fluid enters into a control port 58 passing through the control orifice 74, and the fluid in a control port 57 is discharged from the control orifice 73. Since the passage from the pilot valve to the pressure chambers 64, 65 of the main valve is made short and the device is made to be rotary valve having simple passages, the fluid becomes dispensable in small volume, the propagation delay time of pressure becomes short, and response of the spool 50 is excellent.

63. 发明专利

JPH01239719A FLUID PRESSURE DRIVING DEVICE 失效
公开(公告)号：JPH01239719A
公开(公告)日：1989-09-25
申请号：JP6336888
申请日：1988-03-18
申请人： HITACHI LTD
发明人： NAKAMURA ICHIRO , SHUDO KATSUHARU , KAYANO SHUJI , TAKEDA YASUHIDE
IPC分类号： H01H33/30 , F16K31/12 , H05K1/03
摘要： PURPOSE:To carry out the fluid pressure driving effectively by controlling the breaking and the linking of the fluid at one end of the outer periphery and at one end of the inner periphery of a valve body, receiving the pilot fluid pressure at the other end, and providing a toggle mechanism to contact balls to receive spring force to a groove furnished to the outer periphery of the valve body. CONSTITUTION:When a pilot valve 5 is operated and the pressure fluid in a fluid chamber 26 is exhausted, a valve body 22 is operated to the left by the fluid pressure acting to a fluid chamber 25 and positioned higher than the center line. As a result, flow ways 8 and 9 are cut off, flow ways 9 and 10 are linked, and the high pressure fluid in a fluid chamber 15 of a cylinder is released to the outside. In this case, since the flow way 9 is linked to a low pressure of tank, some liquid leakage from the pilot valve 5 is exhausted through a throttle 31, and the fluid chamber 26 is never made to a high pressure condition. Furthermore, since balls 34 of a toggle mechanism 32 is geared to the groove 38a of the valve body 22, the valve body 22 is maintained at the position. Moreover, by feeding a high pressure fluid to the fluid chamber 26 by the operation of a pilot valve 6, the valve body is operated to the right by the fluid pressure, positioned at the lower side from the center line, and returned to the original condition.

64. 发明专利

JPS63171785A ELEVATOR 失效
公开(公告)号：JPS63171785A
公开(公告)日：1988-07-15
申请号：JP162087
申请日：1987-01-09
申请人： HITACHI LTD
发明人： NAKAMURA ICHIRO , SHUDO KATSUHARU , NARA TOSHIHIKO
IPC分类号： B66B9/00 , B66B9/02 , B66B9/04

65. 发明专利

JP2003155181A RAILWAY STATION FACILITY 审中-公开
公开(公告)号：JP2003155181A
公开(公告)日：2003-05-27
申请号：JP2001356509
申请日：2001-11-21
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： SHUDO KATSUHARU , ONODERA MINORU , UENO AKIO , SUZUKI TOKUO
IPC分类号： E01F1/00 , B66B9/00
摘要： PROBLEM TO BE SOLVED: To provide a railway station facility enabling even a small station to have an elevator only if it has a passengers' overpass connecting platforms by staircases. SOLUTION: The facility comprises platforms 1 provided in parallel with a railway 2, a passengers' overpass 3 bridging the railway 2, staircases 4 connecting the bridge 3 and the platforms 1, elevators 5 provided near the staircases 4 with their upper-floor entrances 7 positioned on the side of the bridge 3, and passages 8 added for connecting the entrances 7 and the bridge 3.

66. 发明专利

JPH11301952A FLUID PRESSURE ELEVATOR 失效
公开(公告)号：JPH11301952A
公开(公告)日：1999-11-02
申请号：JP10807098
申请日：1998-04-17
申请人： HITACHI LTD
发明人： WATANABE HARUO , SHUDO KATSUHARU , MATSUDO TAKASHI , NAKAMURA HIDEHIRO , KOJIMA SHIGETO
IPC分类号： B66B9/04 , B66B5/02
摘要： PROBLEM TO BE SOLVED: To provide a fluid pressure elevator capable of quickly stopping a car without overrunning when an abnormal situation such as power interruption or the like occurs during low-speed descending. SOLUTION: This elevator is provided with a fluid pressure pump 212 whose flow rate is controllable, a fluid pressure cylinder 201, a check valve 209 provided between the fluid pressure pump 212 and the fluid pressure cylinder 201 so as to be opened, and a car 204 directly/indirectly supported on the top part of the fluid pressure cylinder. The speed of the fluid pressure cylinder 201 is controlled by controlling the flow rate of hydraulic fluids supplied or discharged from the fluid pressure pump 212 through the check valve 209 to the fluid pressure cylinder 201, and the speed of the car 204 is controlled. In this case, a change-over valve 214 is provided so as to have a capacity smaller than the check valve 209 for discharging the hydraulic fluids directly from the fluid pressure cylinder to a storage tank 213 and, during low-speed descending, the change-over valve 214 is opened to control the speed of the cage 204.

67. 发明专利

JPH11189379A HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH11189379A
公开(公告)日：1999-07-13
申请号：JP35798997
申请日：1997-12-25
申请人： HITACHI LTD , HITACHI BUILDING SYS CO LTD
发明人： WATANABE HARUO , NAKAMURA ICHIRO , SHUDO KATSUHARU , SASAKI HIDEKAZU , ARAHORI NOBORU , SASAKI SATORU
IPC分类号： B66B1/26 , B66B9/04
摘要： PROBLEM TO BE SOLVED: To suppress shocks at over-speed restraint or at emergency stoppage of a hydraulic elevator being lowered that has a large pressure ratio expressed as the cylinder pressure at the full load divided by that at the zero load. SOLUTION: In series with a check valve 100, a two-way valve 300 is arranged which is designed not to fully close or to have its maximum opening angle while an elevator is operated normally and its minimum opening angle at over-speeding or emergency including a service interruption while the elevator is lowered. At an emergency including a service interruption during such lowering operation, the closing action of the check valve 100 is retarded from the switching action of the two-way valve 300 from the maximum opening angle to the minimum opening angle, or the overall passage area of these two valves or the check valve 100 and two-way valve 300 is phased as long as the check valve 100 is fully closed.

68. 发明专利

JPH11106152A FLUID PRESSURE ELEVATOR 失效
公开(公告)号：JPH11106152A
公开(公告)日：1999-04-20
申请号：JP27278397
申请日：1997-10-06
申请人： HITACHI LTD
发明人： SHUDO KATSUHARU , NAKAMURA ICHIRO , WATANABE HARUO , KOJIMA SHIGETO
IPC分类号： B66B9/04 , B66B1/04
摘要： PROBLEM TO BE SOLVED: To prevent abnormal negative pressure even while stopping of a car before traveling as well as while traveling of the car by limiting a speed command value of car speed to a value smaller than rated speed at the time when a detected value of fluid temperature or both of a pressure detected value and a temperature detected value come to be lower than a specified value. SOLUTION: Speed control of a motor 4 is carried out to reduce a flow rate of a fluid pressure pump 3 by changing a speed command value to a passenger cage 1 when lowering of pressure is detected by pressure detectors 20, 21. Consequently, it is possible to make pressure of the fluid pressure pump 3 higher than a set value and furthermore, it is possible to raise pressure of a fluid pressure cylinder 2, and generation of negative pressure is prevented. Additionally, in the case when generation of abnormal negative pressure is predicted, temperature of fluid is detected before lowering drive traveling, and in the case when its detected value is higher than previously set critical set temperature, it is regarded possible to carry out normal traveling and speed command is made a rated speed command value. Additionally, in the case when the detected value of fluid temperature is lower than critical set value temperature, a speed command value is output by lowering it lower than rated speed.

69. 发明专利

JPH10167622A HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH10167622A
公开(公告)日：1998-06-23
申请号：JP32413196
申请日：1996-12-04
申请人： HITACHI LTD , HITACHI MITO ENG KK , HITACHI ELEVATOR ENG
发明人： WATANABE HARUO , NAKAMURA ICHIRO , SHUDO KATSUHARU , SASAKI HIDEKAZU , UENO AKIO , KOJIMA SHIGETO , TOBA TAKAHISA
IPC分类号： B66B9/04
摘要： PROBLEM TO BE SOLVED: To maintain a rated speed during a descending operation without a load by forcing valve control on the basis of a pressure signal from a pressure sensor during the descending operation, and controlling the opening of a fluid control valve at two or more steps depending on a descending operation load condition. SOLUTION: During the ascending operation of a car 201, a fluid delivered from a hydraulic pump 1 is fed to a hydraulic cylinder 200 via the main valve of a solenoid selector valve 100, on the operation of a control device 5. On the other hand, the pilot valve of the solenoid selector valve 100 is controlled at the time of a descending operation, and the main valve is forced open for descending operation control. In this case, when the pressure of a pump port flow passage 222 becomes approximately equal to cylinder pressure on the operation of the control device 5, the first pilot valve is excited to close. Also, control is made so that one of the second and third normally close pilot valves opens in accordance with the closure of the the first pilot valve. In addition, the opening of the main valve is adjusted at two steps. thereby performing the descending operation of the car 201 at a rated speed.

70. 发明专利

JPH09227035A FLUID PRESSURE ELEVATOR 失效
公开(公告)号：JPH09227035A
公开(公告)日：1997-09-02
申请号：JP3459196
申请日：1996-02-22
申请人： HITACHI LTD
发明人： SHUDO KATSUHARU , NAKAMURA ICHIRO , WATANABE HARUO
IPC分类号： B66B1/26 , B66B1/04 , B66B9/04
摘要： PROBLEM TO BE SOLVED: To improve the comfortableness of a fluid pressure elevator at a low cost by reducing vibrations in the whole area of a start, acceleration/ deceleration, a normal travel, and a stop with good responsiveness without impairing reliability. SOLUTION: An instruction is fed to a flow control valve 7 when a fluid pressure pump 5 is started, the car displacement signal is converted into velocity or acceleration and amplified by a control device when a car 1 starts traveling, and it is fed to the flow control valve 7 as the instruction corresponding to the flow. When vibrations occur on the car 1, the flow leaked to a tank from the flow control valve 7 is controlled, vibration damping is applied in the whole area from the start to the stop of a fluid pressure elevator.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式