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1. 发明专利

JP2000128455A HYDRAULIC ELEVATOR 失效
公开(公告)号：JP2000128455A
公开(公告)日：2000-05-09
申请号：JP30501498
申请日：1998-10-27
申请人： HITACHI LTD , HITACHI BUILDING SYS CO LTD , HITACHI MITO ENG KK
发明人： NAKAMURA HIDEHIRO , WATANABE HARUO , SUZUKI SEIYA , FUKUDA TAKASHI , NAKAMURA HIDEKAZU
IPC分类号： B66B9/04 , B66B5/02
摘要： PROBLEM TO BE SOLVED: To instantly detect abnormal action of a balancer weight caused by the vibration of a car and to reduce the service stop such as stoppage by inputting the behavior of the balancer weight detected by a vibration detecting means into a controller and by adding control sequence for issuing the appropriate driving command. SOLUTION: A detecting means may be installed anywhere in a machine system in a balancer weight side but should be installed in a fixing part with a building structure, namely, a pulley fixing girder 220 and a rope end fixing girder 221. It is so constituted that a hydraulic elevator pressurizes hydraulic fluid stored in an oil tank 107 by a hydraulic pump 103 driven by a motor 104 and the fluid is fed to a hydraulic cylinder 101 via a control valve 102 and a pipe so that a hydraulic plunger 113 raising/lowering the car 106 is driven. The hydraulic elevator with a balancer weight is provided with a balancer weight 203 supporting the load in the hydraulic plunger 113. A vibration detector 211 is provided in the end of a rope 211 of the balancer weight 203 so as to detect either of its displacement, the acceleration, or the tensile force. The vibration level is judged by the abnormal response of the balancer weight 203 and the signal of the detector 211.

2. 发明专利

JPH09142758A HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH09142758A
公开(公告)日：1997-06-03
申请号：JP29807295
申请日：1995-11-16
申请人： HITACHI LTD , HITACHI MITO ENG KK , HITACHI BUILDING SYST CO LTD
发明人： NAKAMURA HIDEHIRO , SUZUKI SEIYA , UENO AKIO , FUKUDA TAKASHI , TACHIBANA MAKOTO
IPC分类号： B66B9/04 , B66B1/04
摘要： PROBLEM TO BE SOLVED: To uniformize at once a temperature distribution in a hydraulic tank by provided a partition panel orthogonal to a side wall of the tank which extends in a same direction as that of a line connecting between the hydraulic oil inlet and outlet of the tank, and by forming the partition panel a stream line shape so that the curvature of either one of the front and rear surfaces thereof along the center line is greater than that of the other. SOLUTION: A partition panel 1 laid along the direction if a flow 2a from a tank inlet port 2, has a shape such that one of curvature along the center line is greater than the other, and accordingly, a difference is obtained between flowing speeds of hydraulic oil flowing in the upper lower part of the partition panel 1. Thus, the pressure of the upper flow 5 in which stream line are converged, is lower than that of the lower flow in which the stream lines are not dense. As a whole of the tank, a high pressure part 4 and a low pressure part 5 are generated temporarily so that the pressure difference is cancelled out. Thus, the hydraulic oil flow from the high pressure part to the low pressure part, and accordingly, the motion in the tank becomes prosperous so that the temperature distribution of the hydraulic oil 8 can be uniformized. With this arrangement, it is possible to enhance the agitation efficiency so as to enhance the control ability.

3. 发明专利

JPH08188357A HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH08188357A
公开(公告)日：1996-07-23
申请号：JP137595
申请日：1995-01-09
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： TACHIBANA MAKOTO , SASAKI HIDEKAZU , UENO AKIO , NAKAMURA HIDEHIRO , SUZUKI TOSHITERU , SUZUKI SEIYA , NAKAMURA HIDEKAZU , NAKADA HIROSHI
IPC分类号： B66B9/04 , B66B5/02 , B66B5/08 , B66B5/16
摘要： PURPOSE: To provide a hydraulic elevator which can respond to a specific story height error, as well as can prevent an excessive lowering of a plunger. CONSTITUTION: To guide rails 7 to guide a pulley bracket 14 connected to a pulley 6 which is provided to a plunger 4, stoppers 13 positioned at the lower side lower a specific distance than the engaged part 14a of the pulley bracket 14, when an elevator car hits to a buffer device, are provided, so as to compose plunger overlowering preventive devices 9.

4. 发明专利

JPH11322229A HYDRAULIC ELEVATOR AND CONTROL THEREOF 失效
公开(公告)号：JPH11322229A
公开(公告)日：1999-11-24
申请号：JP13323798
申请日：1998-05-15
申请人： HITACHI LTD , HITACHI BUILDING SYS CO LTD
发明人： NAKAMURA HIDEHIRO , SUZUKI SEIYA , MASUDA NAOKI
IPC分类号： B66B1/26 , B66B9/04
摘要： PROBLEM TO BE SOLVED: To reduce vibration generated at the time of opening and closing a hydraulic control valve controlling the hydraulic pressure of a hydraulic cylinder, and improve ride comfortableness. SOLUTION: This hydraulic elevator 10 provided with a hydraulic plunger 12 and a hydraulic cylinder 11 lifting up and down a car 20 by hydraulic pressure, a hydraulic pump 15 for feeding hydraulic oil to the hydraulic cylinder 11 through a hydraulic control valve 16, and an oil tank 19 involves a bypass circuit 22 which bypasses the hydraulic pump 15 from the hydraulic cylinder 11 to relieve the hydraulic oil to the oil tank 19, thus relieving the hydraulic oil by the bypass circuit 22 until the car 20 starts displacement from its resting state immediately before the elevator starts operating. The bypass circuit 22 involves a bypass valve 23 which relieves and shuts down the hydraulic oil during this process. It is thus possible to improve ride comfortableness using an inexpensive and simple apparatus.

5. 发明专利

JPH0826628A HYDRAULIC CONTROL DEVICE FOR HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH0826628A
公开(公告)日：1996-01-30
申请号：JP16668194
申请日：1994-07-19
申请人： HITACHI LTD , HITACHI BUILDING SYST ENG
发明人： NAKAMURA HIDEHIRO , SASAKI HIDEKAZU , SUGAWARA JIYUN , SAITO MITSUO , SUZUKI SEIYA , TAKAHOSHI TAKEO , YAMAMOTO KOJI
IPC分类号： B66B9/04
摘要： PURPOSE:To propose a hydraulic control device for hydraulic elevator manufactured at a low cost, in which the cleaning and the maintenance of a filter device can be carried out easily, and the elevator inoperative time in the cleaning or maintenance condition can be reduced. CONSTITUTION:A filter device 34 which can be mounted and demounted easily from the external side is provided between an electromagnetic pilot valve 30 and a stop valve 22 used for the hydraulic control. As a result, foreign matters in the filter device 34 can be removed easily at a low cost, without providing a new oil sealing mechanism, and the inoperative time of the elevator in a maintenance condition can be made in the necessary minimum period.

6. 发明专利

JPH07291556A HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH07291556A
公开(公告)日：1995-11-07
申请号：JP8816194
申请日：1994-04-26
申请人： HITACHI LTD
发明人： SUZUKI SEIYA
IPC分类号： B66B9/04
摘要： PURPOSE:To discharge dust remaining in a hydraulic apparatus to a tank by passing working oil through a filter when the working oil is sucked from an oil tank and returning directly the working oil without passing it through the filter when the working oil is returned to the oil tank. CONSTITUTION:When a hydraulic pump 4 is rotated forward by a motor to supply working oil to a hydraulic jack 9, the working oil is discharged to the hydraulic jack 9 from an oil tank 1 through a working oil suction pipe 5a with a filter of a connecting pipe 5, a check valve 5b for suction, a hydraulic pump 4, discharge pipe 6, flow path direction controlling valve 7 and a piping 8 to lift a cage 10. Then, dust included in the working oil is filtered when it passes through the working oil suction 5a with the filter. When a flow path direction controlling valve 7 is changed over to rotate reversely the hydraulic pump 4, the working oil in the hydraulic jack 9 is circulated to the oil tank 1 through the piping 8, flow path direction controlling valve 7, discharge pipe 6, hydraulic pump 4, discharging check valve 5c of a connecting pipe 5 and working oil discharging pipe 5d without a filter to lower the car 10.

7. 发明专利

JPH10291743A HYDRAULIC TYPE ELEVATOR 失效
公开(公告)号：JPH10291743A
公开(公告)日：1998-11-04
申请号：JP9555897
申请日：1997-04-14
申请人： HITACHI LTD
发明人： NAKAMURA HIDEHIRO , SUZUKI SEIYA
IPC分类号： B66B1/26 , B66B9/04
摘要： PROBLEM TO BE SOLVED: To simplify and stabilize the control in a low speed territory and improve reliability by controlling an elevator by combination of rotating speed of a pump and a control valve exclusive for low speed. SOLUTION: In ascending operation, the whole operation processes are performed as in the past. During respective operations of acceleration, steady state, and deceleration in descending operation, rotating speed of a hydraulic pump 4 is controlled as in the past, and at entering landing operation, operation of the pump 4 is stopped. The flow of hydraulic oil returning from a jack 2 to a tank 6 is controlled by an oil pressure control valve 7 for landing. Landing accuracy is insured by an position detecting mechanism 10 fitted to an elevator car 1. The oil quantity control at landing can be also performed by the use of a usual oil pressure control valve 3, instead of the oil pressure control valve 7 for landing. By this constitution, a complicated control system is unnecessary, and stable landing performance can be provided.

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