Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/0043—Devices enhancing safety during maintenance
  • B66B5/005—Safety of maintenance personnel
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B17/00—Hoistway equipment
  • B66B17/34—Safe lift clips; Keps

Definitions

• the present invention is used for an elevator apparatus in which an operation mode is switched to a maintenance operation mode on a car during a maintenance operation on a car, and the elevator apparatus for the elevator.
• the present invention relates to a car movement restricting device for mechanically restricting the movement of a car.
• FIG. 7 is a plan view showing a car movement restricting device of the conventional elevator apparatus disclosed in, for example, Japanese Patent Publication No. 2000-200373
• FIG. 8 is a car movement restricting device of FIG. FIG.
• a pair of guide rails 3 for guiding the car 2 up and down are installed in the hoistway 1.
• a fixed plate 4 having an engagement hole 4 a is fixed to the guide rail 3.
• a bracket 6 is attached to the upper beam 5 of the car 2.
• a lock rod 7 is supported on the bracket 6.
• the lock rod 7 is manually operated to have an engagement position (the two-dot chain line in the figure) whose leading end is passed through the engagement hole 4a, and a storage position (the solid line in the figure) retracted on the car 2. Is reciprocated linearly between
• the bracket 6 is provided with a holding plate 9 for holding the hook bar 7 at the engagement position and the storage position.
• the holding plate 9 is provided with first and second grooves 9a: 9b into which the operation levers 8 are respectively inserted when the lock bar 7 is in the engagement position and the storage position.
• the bracket 6 is provided with a limit switch 10 that is closed when the lock bar 7 is in the storage position.
• the operation unit 10 a of the limit switch 10 is operated by the rear end of the lock bar 7.
• the hoist 11 that raises and lowers the car 2 is controlled by the controller 12.
• Control device The power supply circuit 13 for supplying electric power to the hoisting machine 11 is provided at 12.
• the limit switch 10 is connected to the power supply circuit 13. When the limit switch 10 is closed, the power supply circuit 13 is on, and when the limit switch 10 is open, the power supply circuit 13 is off.
• the present invention has been made to solve the above-described problems, and can perform finer control in accordance with the position of a movable member for restricting the movement of a car.
• An object of the present invention is to provide an elevator device and a car movement restricting device capable of improving workability of maintenance work.
• a car movement restricting device of an elevator apparatus is a car elevator apparatus including a car that is raised and lowered in a hoistway, a driving device that raises and lowers the car, and a control device that controls the driving device. Used to mechanically regulate the movement of the car during maintenance work on the car.
• a fixing member fixed to one of the hoistway and the car and having a fixed-side engaging portion; a movable-side engaging portion engaged with the fixed-side engaging portion;
• a movable member that is provided on the other side of the road or in the car and that can be displaced between a storage position and an engagement position where the movable-side engaging portion is engaged with the fixed-side engaging portion.
• a switch device that is connected to the control device, and that detects whether the movable member is in the storage position, the engagement position, or the intermediate position between the storage position and the engagement position. Things.
• the elevator apparatus is a car that is raised and lowered in a hoistway, a driving device that raises and lowers the car, a fixing member that is fixed to one of the hoistway and the car, and that has a fixed-side engaging portion A movable-side engaging portion that engages with the fixed-side engaging portion.
• the movable-side engaging portion is provided in the hoistway and / or the car, and the storage position and the movable-side engaging portion are fixedly engaged. Which position of the movable member, the movable member is displaceable between the engagement position engaged with the portion, the movable member is in the storage position, the engagement position, and the intermediate position between the storage position and the engagement position.
• a switch device for selectively detecting between a plurality of operation modes, including a normal mode and an on-car maintenance mode, to control the drive device and to input a signal from the switch device. It has a control device, and the control device When the movable mode is in the car maintenance operation mode, the operation of the car is enabled when it is detected that the movable member is in the stowed position, and the operation of the car is performed when it is detected that the movable member is in the middle position. It is to prevent.
• FIG. 1 is a configuration diagram showing a car movement restricting device of an elevator apparatus according to an example of an embodiment of the present invention
• FIG. 2 is a configuration diagram showing a state in which the arm of FIG. 1 is rotated to an intermediate position
• FIG. 3 is a configuration diagram showing a state in which the arm of FIG. 2 is rotated to an engagement position
• FIG. 4 is a configuration diagram showing a state where the car of FIG. 3 is raised
• FIG. 5 is a flowchart showing the operation of the control device in FIG. 1 in the normal operation mode.
• FIG. 6 is a flowchart showing the operation of the control device in the car maintenance operation mode in FIG. 1.
• FIG. 7 is a plan view showing an example of the conventional car movement restricting device of the elevator apparatus, and
• FIG. 8 is a front view showing the car movement restricting device of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
• FIG. 1 is a configuration diagram showing a car movement restricting device of an elevator apparatus according to an example of an embodiment of the present invention.
• an engaging plate 21 as a fixing member is fixed to a fixed portion in a hoistway such as a guide rail.
• the engagement plate 21 is provided with an engagement hole 21a as a fixed engagement portion.
• An arm 23 as a movable member is mounted on the car 22 which is raised and lowered in the hoistway.
• the arm 23 is rotatable about a shaft 24 between a storage position (FIG. 1) and an engagement position (FIGS. 3 and 4).
• the distal end of the arm 23 is provided with a hook portion 23a as a movable side engaging portion that engages with an outer peripheral portion of the engaging member 21a.
• a cam 25 is fixed to the arm 23.
• the car 22 is equipped with a first switch 26 operated by a cam 25.
• the first switch 26 has a normally closed contact 26a, and is closed when the arm 23 is in the storage position, and the arm 23 is in the middle position between the storage position and the engagement position (see FIG. 2) and operated by the cam 25 when it is in the engaged position and released.
• the first switch 26 is mechanically operated by the arm 23. It is arranged to be forcibly closed.
• a second switch 27 operated by the engagement plate 21 is mounted on the arm 23.
• the second switch 27 has a normally open contact 27a, and is opened when the arm 23 is in the storage position and the middle position, and is closed when the arm 23 is in the engagement position.
• the switch device 28 has a first switch 26 and a second switch 27, and detects which of the arm 23 is in the storage position, the engagement position, and the middle position.
• the car 22 is raised and lowered by the driving force of the driving device 29.
• the driving device 29 is controlled by the control device 30.
• the control device 30 operates in the normal mode and the car maintenance mode.
• the driving device 29 is controlled by selectively switching a plurality of operation modes including the following.
• the first switch 26 is connected in series to a safety circuit (not shown), when the normally closed contact 26a is opened, the power supply to the drive unit 29 is cut off. Therefore, when the arm 23 is in the engaged position, the driving device 29 can operate the car 22, but when the arm 23 is in the middle position or the engaged position, the car 22 can be operated. Is blocked.
• a bypass switch (not shown) for opening and closing a bypass circuit for short-circuiting (bypassing) the first switch 26 together with an on-car operation switch for operating the car 22. Is provided. Therefore, even when the arm 23 is in the engaged position, the car 22 can be raised and lowered at a low speed by operating the on-car operation switch while operating the bypass switch to close the bypass circuit.
• the first switch 26 is operated by the cam 25, and the first switch 26 is released. Also, the second switch 27 is open because it does not abut against the engagement plate 21.
• the movement of the car 22 is mechanically controlled within the range of the engagement hole 21a even if the brake device (not shown) of the drive device 29 is released. Regulated. For example, when the braking device is released with the counterweight (not shown) heavier than the car 22, the car 22 is raised, but as shown in FIG. By engaging the upper edge of the hole 21a, the elevation of the car 22 is restricted.
• the operation mode is switched to the on-car maintenance operation mode, and the car 22 is moved to the predetermined maintenance position at a low speed. . After this, the arm 23 is rotated to the engagement position,
• the arm 23 is returned to the storage position, and the operation mode is returned to the normal operation mode.
• the hook 23a is in contact with the periphery of the engaging hole 21a
• the bypass switch and the on-car operation switch are simultaneously operated to operate the car 22. Is raised or lowered slightly, and the position of the hook portion 23a with respect to the engagement hole 21a is returned to the position shown in FIG. 3, and then the arm 23 is rotated to the storage position.
• FIG. 5 is a flowchart showing the operation of the control device 30 of FIG. 1 in the normal operation mode.
• the normal operation mode first, it is checked whether the arm 23 is at the storage position (step S1). If the arm 23 is not at the storage position, the operation of the car 22 is blocked (step S 2). Thereby, the interference of the arm 23 with the hoistway device is more reliably prevented.
• step S3 When it is confirmed that the arm 23 is at the storage position, it is confirmed whether the arm 23 is at the engagement position (step S3). Normally, if the arm 23 is in the stowed position, the second switch 27 is open, so it is confirmed that the arm 23 is not in the engaged position, and the car 22 can be operated. (Step S 4). However, if it is detected that the arm 23 is in the engagement position in spite of the detection that the arm 23 is in the storage position, it is determined that a failure has occurred in the switch device 28, and the abnormality is detected. A detection signal is output (step S5).
• FIG. 6 is a flowchart showing the operation of the control device 30 of FIG. 1 in the on-car maintenance operation mode.
• the on-car maintenance operation mode it is first checked whether the arm 23 is at the storage position (step S1). When it is confirmed that the arm 23 is in the stowed position, it is confirmed whether the arm 23 is in the engaged position. S3).
• step S If it is confirmed that the arm 23 is not in the engagement position, it is determined that the arm 23 is in the storage position and there is no abnormality in the switch device 28, and the car 22 can be operated (step S). Four ) . Therefore, even in the on-car maintenance operation mode, when the arm 23 is at the storage position, the operation of the car 22 is possible, and the car 22 can be moved to the predetermined maintenance position.
• step S5 If it is detected that the arm 23 is at both the storage position and the engagement position, it is determined that the switch device 28 has failed, and an abnormality detection signal is output (step S5).
• step S6 it is confirmed whether the arm 23 is at the engagement position. If it is detected that the arm 23 is neither at the storage position nor at the engagement position, it is determined that the arm 23 is at the middle position, and the operation of the car 22 is blocked (step S7).
• Step S8 If it is detected that the arm 23 is not at the storage position but at the engagement position, the operation of the car 22 is prevented, and the release command signal of the brake device of the drive unit 29 can be output. (Step S8). As a result, the brake device can be released, and maintenance work can be performed with the brake device released. Further, as described above, if the bypass switch and the on-car operation switch are simultaneously operated, the car 22 can be operated at a low speed.
• the switch device 28 can detect the arm 23 in the storage position, the engagement position, or the intermediate position to detect the arm 23 in the different position. Therefore, finer control can be performed according to the position of the arm 23, and the workability of maintenance work on the car can be improved.
• the arm 23 is closed when the arm 23 is in the storage position, and the arm 23 is in the middle position and A first switch 26 that is opened when in the engaged position, and a second switch that is opened when the arm 23 is in the storage position and the middle position, and is closed when the arm 23 is in the engaged position. Since the switch device 28 having the switch 27 is used, the storage position, the engagement position, and the middle position can be detected separately with a simple configuration.
• the first switch 26 is arranged so as to be operated by the arm 23 and forcibly closed when the arm 23 is returned to the storage position, the first switch 26 The first switch 26 can operate normally even when the switch does not self-recover.
• the arm 23 is provided with a cam 25 for operating the first switch 26 when the arm 23 is at the middle position or the engagement position, so that the first switch 26 can be more securely operated. Can be operated.
• the operation mode is the car-on-maintenance operation mode
• the controller 23 detects that the arm 23 is in the stowed position
• the controller 30 enables the operation of the car 22, and the arm 23 is moved to the middle position or
• the operation of the car 22 is prevented, so that maintenance work on the car 22 can be performed more safely.
• control device 30 prevents the operation of the car 22. Can be more reliably prevented.
• the release command signal for the brake device is output, so that the brake device can be released more safely.
• the car 22 when the bypass switch is closed by operating the bypass switch when the arm 23 is in the engaged position, the car 22 can be operated by operating the on-car operation switch, so that the arm 23 is engaged.
• the car 22 can be raised and lowered even when in the position, and the engaged state of the arm 23 can be easily released.
• the engagement plate 21 is fixed in the hoistway, and the arm 23 is mounted on the car 22.
• the fixing member may be fixed to the car, and the movable member may be provided in the hoistway.
• the rotatable arm 23 is shown as the movable member, but a movable member that can be slid as shown in FIGS. 7 and 8 may be used.

Landscapes

• Maintenance And Inspection Apparatuses For Elevators (AREA)
• Elevator Control (AREA)

Priority Applications (6)

Applications Claiming Priority (1)

Publications (1)

Family

ID=11737374

Family Applications (1)

Country Status (6)

Cited By (7)

Families Citing this family (11)

Citations (3)

Family Cites Families (3)

• 2001
  • 2001-05-30 WO PCT/JP2001/004566 patent/WO2002098780A1/ja active IP Right Grant
  • 2001-05-30 KR KR10-2003-7000920A patent/KR100506476B1/ko active IP Right Grant
  • 2001-05-30 EP EP01934433A patent/EP1437320B1/en not_active Expired - Lifetime
  • 2001-05-30 CN CNB018134629A patent/CN1184127C/zh not_active Expired - Lifetime
  • 2001-05-30 JP JP2003501782A patent/JP4896370B2/ja not_active Expired - Fee Related
  • 2001-05-30 DE DE60125990T patent/DE60125990T2/de not_active Expired - Lifetime

Patent Citations (3)

Non-Patent Citations (1)

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