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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

JPH11343082A FLUID PRESSURE ELEVATOR 失效
公开(公告)号：JPH11343082A
公开(公告)日：1999-12-14
申请号：JP17057998
申请日：1998-06-03
申请人： HITACHI LTD , HITACHI BUILDING SYS CO LTD , HITACHI MITO ENG KK
发明人： SHUDO KATSUHARU , NAKAMURA ICHIRO , WATANABE HARUO , SASAKI SATORU , NAKAMURA HIDEKAZU
IPC分类号： B66B9/04 , B66B5/12
摘要： PROBLEM TO BE SOLVED: To facilitate the installation of a rope-loosening detecting device for rope of a counter weight, and obtain high safety during traveling of a car and during maintenance and checking operations, in a fluid pressure elevator in which the counter weight for compensating the dead weight of the car is provided. SOLUTION: In a fluid pressure elevator in which a car is indirectly supported by a fluid pressure cylinder 2 through a first rope 5 and a counter weight 3 is directly or indirectly connected to a car 1 through a second rope 6 and a pulley 8 provided at a fixed member 10 on the top of a hoistway, a rope- loosening detecting device 15 is provided on the fixed member 10 at the top of the hoistway or on the periphery of the pulley to detect the changes in tensile force of first and/or second rope 5, 6, and a transmission line 15a for transmitting detected signals is wired to the fixed member 10 at the top of the hoistway and a strut member 100 in the hoistway.

3. 发明专利

JPH11301950A HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH11301950A
公开(公告)日：1999-11-02
申请号：JP10898598
申请日：1998-04-20
申请人： HITACHI LTD , HITACHI MITO ENG KK , HITACHI BUILDING SYS CO LTD
发明人： WATANABE HARUO , NAKAMURA ICHIRO , SHUDO KATSUHARU , SASAKI HIDEKAZU , NAKAMURA HIDEHIRO , UENO AKIO , NAKAMURA HIDEKAZU , FUKUDA TAKASHI , KOJIMA SHIGETO
IPC分类号： B66B9/04 , B66B7/06
摘要： PROBLEM TO BE SOLVED: To make the plane sizes of a car and a hoistway when a balance weight is provided equal to those when no balance weight is provided by providing the balance weight, and arranging a pulley to be hooked with a rope for suspending the balance weight inclinatorily against the axis of the hoistway plane. SOLUTION: If a moving pulley 14 is arranged in parallel with the axis Y of a hoistway plane without changing the hanging point C3 of a balance weight rope fitted to a beam 101, the hanging points of the moving pulley 14 and a fixed pulley 9A are drifted, the pulleys 14, 9A are twisted, and the balance weight rope is apt to be disconnected. A fixed pulley 9 to be hooked with the balance weight rope or the moving pulley 14 is arranged inclinatorily against the axis Y of the hoistway plane to prevent this problem, therefore the plane size of a car 1 and the plane size of a hoistway 100 can be made equal to those when no balance weight is provided without drifting the hanging point C3 of the balance weight rope.

4. 发明专利

JPH11209022A ELEVATOR WITH EMERGENCY STOP DEVICE 失效
公开(公告)号：JPH11209022A
公开(公告)日：1999-08-03
申请号：JP772198
申请日：1998-01-19
申请人： HITACHI LTD , HITACHI BUILDING SYS CO LTD
发明人： SASAKI SATORU , NAKAMURA ICHIRO , WATANABE HARUO , HAGITANI TOMOFUMI
IPC分类号： B66B9/04 , B66B5/02 , B66B5/16 , B66B7/06
摘要： PROBLEM TO BE SOLVED: To prevent malfunction of an elevator emergency stop device which operates upon detecting a loosening in a rope tension. SOLUTION: An emergency stop device 8 comprises a car 5 which is suspended by a rope 4 and runs along a guide rail 6, a tension detector 7 arranged in the car 5 for detecting the tension of the rope 4, a lever 7a which is displaced by amplifying the displacement of the tension detector 7, and a braking member 8c which holds the guide rail 6 by the operation of the lever 7a. The device 8 further comprises a playably engaged part 10 arranged between the lever 7a of the tension detector 7 and the breaking member 8c which operates by the lever 7a, so that the playably engaged part 10 can play only within a certain section. This has an effect such that when the rope tension fluctuates due to shaking by the passengers or the like, malfunction of the emergency stop device is reduced, for preventing trapping passengers, unnecessary stopping of the elevator, and the like.

5. 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.

6. 发明专利

JPH11301949A HYDRAULIC ELEVATOR DEVICE 失效
公开(公告)号：JPH11301949A
公开(公告)日：1999-11-02
申请号：JP11171698
申请日：1998-04-22
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： ARAHORI NOBORU , MATSUDO TAKASHI , UENO AKIO , NAKAMURA ICHIRO , WATANABE HARUO
IPC分类号： B66B9/04
摘要： PROBLEM TO BE SOLVED: To prevent the buffer collision of a balance weight by allowing the stopper of a plunger to hit a cylinder before the balance weight collides with a buffer when the balance weight is lowered excessively. SOLUTION: The length of a rope 8 is set so that the stopper 41 of a plunger 4 hits a cylinder 3 to prevent the plunger from rising any more before a car 1 hits the apex of a hoistway 10 or a beam 11 when an elevator rises excessively due to some abnormality. A balance weight 2 is located at a position not to collide with a buffer 6 at this time, i.e., the length of a rope 9 on the balance weight 2 side is set so that a gap set in advance is kept between the balance weight 2 and the buffer 6 when the stopper 41 of the plunger 4 hits the upper section of the cylinder 3. Even if the elevator rises excessively due to some abnormality, the stopper 41 is prevented from hitting the car 1, and the buffer collision of the balance weight 2 can be avoided.

7. 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.

8. 发明专利

JPH11292421A FLUID PRESSURE ELEVATOR 失效
公开(公告)号：JPH11292421A
公开(公告)日：1999-10-26
申请号：JP10082098
申请日：1998-04-13
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： UENO AKIO , SASAKI HIDEKAZU , NAKAMURA ICHIRO , WATANABE HARUO
IPC分类号： B66B9/04 , B66B5/02
摘要： PROBLEM TO BE SOLVED: To detect an abnormality and immediately stop an elevator by providing a pressure sensor between a control valve and a fluid pressure jack in the fluid pressure elevator. SOLUTION: A car 2 is operated by roping via a sheave 5 provided at the apex of a rope 4 and a fluid pressure cylinder 3 by the fluid pressure cylinder 3 in a hoistway. A balance weight sheave 10a and a rope 60 are fixed, and a balance weight 6 installed to compensate the tare weight of the car 2 is connected via a balance weight sheave 10b. A pressure sensor 106 is arranged in a pipe path between a control valve 102 and the fluid pressure jack 3 against abnormal conditions. The pressure sensor 106 detects a pressure change at the time of an abnormality against the pressure value during a normal travel, feeds back the pressure change to master and slave microcomputers serving as a controller 107 and a current controller, and stops a motor 100. The abnormality is detected as the fluid pressure change and fed back to the controller, thereby the safety of the whole system can be easily secured by a simple structure.

9. 发明专利

JPH10279220A FLUID PRESSURE ELEVATOR 失效
公开(公告)号：JPH10279220A
公开(公告)日：1998-10-20
申请号：JP8951597
申请日：1997-04-08
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： WATANABE HARUO , NAKAMURA ICHIRO , SASAKI HIDEKAZU , UENO AKIO , SHUDO KATSUHARU , KOJIMA SHIGETO
IPC分类号： B66B9/04 , B66B5/12
摘要： PROBLEM TO BE SOLVED: To reduce offset load of a car and detect loosening of a rope on a fluid pressure cylinder side only. SOLUTION: This elevator consists of a car 1 arranged in a hoistway 100 in such a manner that it can be lifted and lowered, a support frame attached to the car, a first rope 3 whose one end is fixed in the hoistway and whose other end is fixed to the support frame through a pulley 4 provided in a top part of a fluid pressure cylinder 2, and a second rope 6 whose one end is fixed to a balance weight 5 and whose other end is fixed to the support frame through a pulley 7 for balance weight provided in a top part of the hoistway. In this case, the support frame consists of a first support frame 200 which fixes the first rope 3 and a second support frame 201 which fixes the second rope 6, the first rope 3 and the second rope 6 are fixed to each support frame mutually at substantially the same position, and the second support frame 201 is overlapped on the first support frame 200.

10. 发明专利

JPH10338434A HYDRAULIC ELEVATOR 失效
公开(公告)号：JPH10338434A
公开(公告)日：1998-12-22
申请号：JP14630797
申请日：1997-06-04
申请人： HITACHI LTD , HITACHI MITO ENG KK , HITACHI ELEVATOR ENG
发明人： TOBA TAKAHISA , NAKAMURA ICHIRO , WATANABE HARUO , SASAKI HIDEKAZU , UENO AKIO , SHUDO KATSUHARU , KOJIMA SHIGETO
IPC分类号： B66B9/04 , B66B5/12
摘要： PROBLEM TO BE SOLVED: To detect seizure of a counterweight and a rail for guiding the counterweight and abnormalities such as cutting of a rope for the counterweight, in a hydraulic elevator provided with the counterweight and the rope for the counterweight. SOLUTION: In a hydraulic elevator, a car 1 and a counterweight 5 are connected by a counterweight rope 6. A displacement sensor 26 for detecting the displacement of a thimble rod spring 22 is attached to the connection part 20 for the counterweight rope 6 and a suspending frame 1a of the car 1. The abnormality of tension of the counterweight rope 6 is detected from the output of the displacement sensor 26.

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