JP2006199404A - Terminal safety device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal safety device for an elevator preventing a car provided with a foldable safety fence on an apex part from interferring with the uppermost part of a shaft or the lowermost part of the shaft and ensuring a working space for maintenance work at an upper part of the car and the lowermost part of the shaft. <P>SOLUTION: When switching to a maintenance mode by an on-car maintenance mode switching switch and maintenance operation is performed by an on-car maintenance operation switch, the operation is possible only when a folding detector 12 detects the standing state of the safety fence 11 and interference of the safety fence 11 and the uppermost part of the shaft is prevented. The car is lifted up/down between an action point of a maintenance operation upper limit switch 15 for ensuring the working space on the upper part of the car 6 and an action point of a usual operation lower limit switch for preventing interference of the car 6 passed through the lowermost floor with the lowermost part of the shaft. When the folding detector 12 detects the flat folded state of the safety fence 11, the car is not lifted up/down. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a terminal safety device for an elevator that prevents interference between the uppermost part of the hoistway or the lowermost part of the hoistway.

The top gap from the top of the car to the hoistway ceiling when the car is stopped on the top floor is set to a predetermined size to prevent the car from colliding with the top of the hoistway. In addition, the depth of the pit from the floor of the lowest floor to the floor of the bottom of the hoistway is set to a predetermined size necessary for installing a shock absorber corresponding to the speed of the car.
By the way, when carrying out maintenance inspection work on the car, the top gap may be too narrow. In addition, a safety fence may be provided on the car in consideration of work safety, and in such a case, a space larger than the top gap is required to prevent a collision between the safety fence and the hoistway ceiling. Become.

Therefore, when a safety fence that can be moved up and down is provided on a car, for example, a conventional elevator terminal safety device is configured to move together with a cam attached to the safety fence. When the safety fence is raised to work on the car, both the cams move upward, so that the limit switch can be operated in front by the amount corresponding to the moving distance to prevent the ascending operation. Thereby, the collision between the safety fence and the hoistway ceiling is avoided (Patent Document 1).
In addition, a folding fence is provided on the car, and when the folding fence is standing, it cannot be operated by either the normal operation switch or the in-car maintenance operation switch. In the case of the maintenance operation switch on the car, there is one that can be operated regardless of the ups and downs of the folding fence (Patent Document 2).
Furthermore, when the raising limit switch is pressed by the cam attached to the car in a state where the handrail device on the car stands up and the upright switch operates, the car stops before the car reaches the top floor landing. In some cases, this stop prevents the handrail device from colliding with equipment at the top of the hoistway (Patent Document 3).

JP 2002-145545 A (paragraph numbers 12 to 16, FIGS. 1 and 2) JP 2001-247272 A (paragraph numbers 11 to 17, FIGS. 2 and 3) JP 2002-96979 A (paragraph numbers 28 and 29, FIG. 7)

A conventional elevator terminal safety apparatus is configured as described above, and the apparatus described in Patent Document 1 can perform maintenance operation on a car regardless of the start-up of a safety fence. For this reason, when the ascending operation is performed without raising the safety fence, there is a problem that the car rises to a position approaching the hoistway ceiling, causing a problem in maintenance work on the car.
Moreover, since the thing of patent document 2 can drive | operate irrespective of the raising / lowering of a folding fence, when driving | operating with a maintenance operation switch on a cage | basket, the working space on a cage | basket | car is not ensured and it fully protects an operator. There was a problem that it was not possible.
Further, in the case of the one described in Patent Document 3, when the handrail device stands, the car stops in front, so that the collision between the handrail device and the equipment at the top of the hoistway is avoided, but the handrail device is raised and lowered. There is a problem that it is deficient in the protection of workers on the car because it can be operated regardless of the car.

  The present invention was made to solve the above-described problems, and prevents a car provided with a undulating safety fence at the top from interfering with the uppermost part of the hoistway or the lowermost part of the hoistway, It is an object of the present invention to provide an elevator terminal safety device that secures a work space for maintenance work on a car and at the lowermost part of a hoistway.

  The elevator end safety device according to the present invention is an elevator end safety device that prevents a car provided with a undulating work safety fence at the top from interfering with the upper part of the hoistway or the lower part of the hoistway. When the maintenance mode is switched to the maintenance mode with the on-car maintenance mode switch and the maintenance operation is performed with the on-car maintenance operation switch, the operation can be performed only when the undulation detector detects the standing state of the safety fence. The upper limit switch for maintenance operation that prevents interference between the safety fence and the uppermost part of the hoistway and secures a work space on the car, and the car passes over the lowest floor and the lower part of the hoistway It moves up and down between the operating points of the lower limit switch for normal operation to prevent interference, so that it does not move up and down when the undulation detector detects the flat state of the safety fence.

  In addition, when the car is maintained by the maintenance mode switch outside the hoistway and the maintenance operation switch outside the hoistway provided at the lowest floor hall, when the undulation detector detects the standing state of the safety fence, The lower part for maintenance operation which prevents the interference between the safety limit and the upper limit switch for maintenance operation to prevent the interference between the upper part of the hoistway and the lower part of the hoistway and secures the working space in the lower part of the hoistway The upper part for normal operation that prevents the car from passing over the top floor and interfering with the top of the hoistway when the undulation detector detects the flat state of the safety fence. It moves up and down between the operating point of the limit switch and the operating point of the lower limit switch for maintenance operation.

  In addition, when switching to maintenance mode with the in-car maintenance mode switch and performing maintenance on the car with the in-car maintenance operation switch, when the undulation detector detects the standing state of the safety fence, the safety fence and hoistway Between the operating point of the upper limit switch for maintenance operation that prevents interference with the top part and the operating point of the lower limit switch for normal operation that prevents the car from crossing the lowest floor and preventing interference with the lower part of the hoistway When the elevator detector moves up and down and detects the flat state of the safety fence, the operating point of the upper limit switch for normal operation that prevents the car from passing over the top floor and interfering with the top of the hoistway and normal operation It moves up and down between the operating points of the lower limit switch.

Since this invention is comprised as mentioned above, there exist the following effects.
When maintenance operation is performed using the on-car maintenance mode switch and on-car maintenance operation switch, maintenance operation is possible only when the safety fence is upright, so that workers on the car can be protected. Play.
Further, since the ascending operation is stopped by the operation of the upper limit switch for maintenance operation, there is an effect that it is possible to prevent the interference between the safety fence and the uppermost part of the hoistway and to secure the work space on the car.
Further, since the car can be lowered to the operating point of the lower limit switch for normal operation, there is also an effect that maintenance and inspection work can be performed over a wide range of the hoistway.

Also, when the car is maintained by the maintenance mode switch outside the hoistway and the maintenance operation switch outside the hoistway, the ascending operation is stopped by the operation of the upper limit switch for maintenance operation when the safety fence is standing. Therefore, there is an effect that interference between the safety fence and the uppermost part of the hoistway can be prevented.
In addition, when the safety fence is flat, it can be raised until the upper limit switch for normal operation is operated, so that the maintenance operation can be performed over a wide range of the hoistway.
Furthermore, in the descent operation, the descent operation is stopped by the operation of the lower limit switch for maintenance operation regardless of the undulation of the safety fence, so that interference with the lower part of the hoistway is prevented and the work space in the lower part of the hoistway is reduced. There is also an effect that it can be secured.

In addition, when performing maintenance operation of the car with the in-car maintenance mode switch and in-car maintenance operation switch, when the safety fence is up, the upward operation is stopped by the operation of the upper limit switch for maintenance operation. There is an effect that interference between the safety fence and the uppermost part of the hoistway can be prevented.
In addition, when the safety fence is flat, it can be raised until the upper limit switch for normal operation is operated, so that the maintenance operation can be performed over a wide range of the hoistway.
Furthermore, in the case of the descent operation, since it can be lowered to the operating point of the lower limit switch for normal operation regardless of the undulation of the safety fence, there is also an effect that a wide range of maintenance inspection work can be performed.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, and duplication of description was omitted.
Embodiment 1 FIG.
1 to 8 show Embodiment 1 of the present invention.
FIG. 1 is a vertical cross-sectional view of a hoistway showing the uppermost part of the hoistway 1 when a car 6 operating in a normal mode for transporting passengers reaches the uppermost floor 3. A landing door 5 is installed at the entrance 4 of the top floor 3. The car 6 is suspended by a main measure 22r wound around a deflecting wheel 22s attached to the hoistway ceiling 2. A car operation panel 7 is attached to the car 6 and an in-car maintenance operation panel 8 is incorporated. As shown in FIG. 5, the in-car maintenance operation panel 8 is always locked by a key 8a, and is opened and used during maintenance operation. The in-car maintenance operation panel 8 includes an in-car maintenance mode switch 9 and an in-car maintenance operation switch 10. The in-car maintenance mode switching switch 9 is selectively switched between a normal mode for transporting passengers and a maintenance mode for maintenance inspection. The in-car maintenance operation switch 10 includes an ascending operation button 10u that continues the ascending operation at a low speed and a descending operation button 10d that similarly continues the descending operation during the pressed period.

On the top of the car 6 is mounted a safety fence 11 that can be raised and lowered. The undulation of the safety fence 11 is detected by the undulation detector 12. During normal operation, the safety fence 11 is in a flat state, and the top fence Tc is separated from the safety fence 11 to the lower surface of the deflecting wheel 22s.
A cam 13 is attached to the side portion of the car 6 with its longitudinal direction directed in the vertical direction. Further, a normal operation upper limit switch 14 and a maintenance operation upper limit switch 15 which are operated by a cam 13 are attached to the side wall of the hoistway 1. The upper limit switch 14 for normal operation operates to face the cam 13 when the car 6 reaches the first upper fixed point Pu1 that is higher than the top floor 3 by a distance δu1. This distance δu1 is set to a value smaller than the top gap Tc. For this reason, the car 6 is prevented from rising by the upper limit switch 14 for normal operation, so the car 6 does not collide with the baffle 22s or the hoistway ceiling 2 constituting the uppermost part of the hoistway.

Further, the upper limit switch 15 for maintenance operation operates to face the cam 13 when the car 6 reaches the second upper fixed point Pu2 that is a distance δu2 before the top floor 3.
On the car 3, a car maintenance operation panel 16 is installed. As shown in FIG. 5, the on-car maintenance operation panel 16 is similar to the in-car maintenance operation panel 8, and includes an on-car maintenance mode switch 17 and an on-car maintenance operation switch 18. The car maintenance mode switching switch 17 switches the operation mode between the normal mode and the maintenance mode. The on-car maintenance operation switch 18 includes an ascending operation button 18u that continues the ascending operation at a low speed and a descending operation button 18d that similarly continues the descending operation during the pressed period.

FIG. 2 is a vertical cross-sectional view of the hoistway showing the lowermost part of the hoistway 1 when the car 6 during normal operation reaches the lowermost floor 24.
A shock absorber 20, a hoisting machine 22, and a control panel 23 are installed on the hoistway bottom surface 21. A maintenance operation panel 29 outside the hoistway is installed at the landing on the lowest floor 24. As shown in FIG. 5, the outside hoistway maintenance operation panel 29 is similar to the in-car maintenance operation panel 8, and includes an outside hoistway maintenance mode switching switch 30 and an outside hoistway maintenance operation switch 31. Yes. The outside hoistway maintenance mode change-over switch 30 switches the operation mode alternatively between the normal mode and the maintenance mode. The outside hoistway maintenance operation switch 31 includes an ascending operation button 31u that continues the ascending operation at a low speed and a descending operation button 31d that also continues the descending operation during the pressed period. A landing door 26 is installed at the entrance 25.
The shock absorber 20 having a stroke corresponding to the speed of the car 6 is selected. For this reason, the depth Pdo of the pit from the floor surface of the lowermost floor 24 to the hoistway bottom surface 21 is a depth that can accommodate the shock absorber 20, and the car 6 has landed on the lowermost floor 24. Sometimes, a predetermined travel margin Rbd is set from the lower surface of the car 6 to the upper surface of the shock absorber 20.

Further, a normal operation lower limit switch 27 and a maintenance operation lower limit switch 28 which are operated by the cam 13 are attached to the side wall of the hoistway 1. The lower limit switch 27 for normal operation operates to face the cam 13 when the car 6 reaches the first lower fixed point Pd1 that has traveled far below the lowermost floor 24 by the distance δd1. This distance δd1 is set to a value smaller than the travel margin Rbd. For this reason, since the car 6 is prevented from being lowered by the lower limit switch 27 for normal operation, the car 6 does not collide with the shock absorber 20 or the hoisting machine 22m constituting the lowest part of the hoistway.
The lower limit switch 28 for maintenance operation operates to face the cam 13 when the car 6 reaches the second lower fixed point Pd2 that is a distance δd2 before the lowest floor 24.

  FIG. 3 is a vertical cross-sectional view of the hoistway showing the car 6 that has risen to the vicinity of the uppermost part of the hoistway 1 and that has been stopped by the upper limit switch 15 for maintenance operation. The safety fence 11 stands and is tightened by the wing nut 11a to maintain the standing state. An operator 19 is on the safety fence 11 on the car 6. The upper limit switch 15 for maintenance operation is activated when the car reaches the second upper fixed point Pu2 lower than the floor surface of the uppermost floor 3, so that the car 6 is stopped. A work space on the car 6 is secured while preventing a collision with the deflecting wheel 22s constituting the vehicle.

FIG. 4 is a vertical cross-sectional view of the hoistway that shows the car 6 that has been lowered to the vicinity of the lowermost part of the hoistway 1 and has been stopped by the operation of the lower limit switch 28 for maintenance operation. When the car 6 reaches the second lower fixed point Pd2 higher than the floor surface of the lowermost floor 24, the lower limit switch 28 for maintenance operation operates to stop the car 6, so that the buffer installed at the lowermost part of the hoistway Collision with the machine 20, the hoisting machine 22m and the control panel 23 is prevented, and a working space at the lowermost part of the hoistway is secured.
In order to enter the pit, the worker 32 operates the outside hoistway maintenance operation panel 29 to raise the car 6 to a position higher than the second lower fixed point Pd2. The landing door 26 is manually opened and descended to the hoistway bottom surface 21. The working space can be arbitrarily adjusted by operating the outside hoistway maintenance operation panel 29 as necessary to raise and lower the car 6 and stop the car 6 above the second lower fixed point.

FIG. 5 is a control circuit connection diagram of the elevator terminal safety device.
The control panel 23 includes a microcomputer and a lift control device 23a. The microcomputer part includes a ROM 37, a RAM 38 and an input / output device 39 connected to the CPU 35 via a bus line 36. The ROM 37 stores the programs and fixed data shown in FIGS. 6 to 8, and the RAM 38 stores temporary data. The input / output device 39 is connected to an external device, and exchanges signals. The raising / lowering control apparatus 23a controls the winding machine 22m based on the calculation result from a microcomputer.
The in-car maintenance operation panel 8 is closed by a key 8a, and the outside hoistway maintenance operation panel 29 is closed by a key 29a. For this reason, the maintenance operation panel 8 in the car and the maintenance operation panel 29 outside the hoistway are not abused by unspecified persons.

6 to 8 are flowcharts of programs stored in the ROM 37. FIG. The processing shown in each flowchart is repeatedly executed at predetermined time intervals.
FIG. 6 is a flowchart showing the operation when the maintenance operation is performed by the on-car maintenance mode switching switch 17 and the on-car maintenance operation switch 18. In the figure, it is checked in step S11 whether the on-car maintenance mode switch 17 has been operated. When the operation mode is changed to the maintenance mode, the process proceeds to step S12 to check whether the on-car maintenance operation switch 18 is operated. If it is operated, the process proceeds to step S13, and it is checked whether the safety fence 11 on the car 6 is standing by the output signal of the undulation detector 12. If it is standing, the process proceeds to step S14.

  If the ascending operation button 18u is operated in step S14, the process proceeds to step S15 to check whether the upper limit switch 15 for maintenance operation is operating. If it is operating, the process proceeds to step S16, and a maintenance operation stop command is output to the elevation controller 23a. If the upper limit switch 15 for maintenance operation is not activated in step S15, the process proceeds to step S17, and a maintenance operation command in the upward direction is output.

  If the descending operation button 18d is operated in step S14, the process proceeds to step S18 to check whether the normal operation lower limit switch 27 is operating. If it is operating, the process proceeds to step S16, and a maintenance operation stop command is output to the elevation controller 23a. When the normal operation lower limit switch 27 is not activated in step S18, the process proceeds to step S17, and a maintenance operation command in the downward direction is output to the lifting control device 23a.

  In step S11, the mode has been switched to the maintenance mode, but if the maintenance operation switch 18 on the car is not operated in step S12, or the maintenance operation switch 18 on the car is operated, the safety fence is displayed in step S13. If 11 is flat, the process proceeds to step S16, and a maintenance operation stop command is output to the lifting control device 23a.

  If the car maintenance mode switch 17 is not operated in step S11 and the normal mode is selected, the process proceeds to step S19. If the maintenance mode changeover switch 30 outside the hoistway is operated and the maintenance mode is set in step S19, the processing shown in FIG. 7 is executed. If not, the process proceeds to step S20. In step S20, when the in-car maintenance mode switch 9 is operated to enter the maintenance mode, the process shown in FIG. 8 is executed. When it is not operated, it moves to procedure S21, the normal driving command which conveys a passenger is outputted towards the raising / lowering control apparatus 23a, and a process is complete | finished.

  Accordingly, the maintenance mode changeover switch 17 on the car is switched to the maintenance mode with the highest priority. The maintenance mode changeover switch 30 outside the hoistway can be switched to the maintenance mode when the on-car maintenance mode changeover switch 17 is not in the maintenance mode. The in-car maintenance mode switching switch 9 can be switched to the maintenance mode only when both the on-car maintenance mode switching switch 17 and the outside hoistway maintenance mode switching switch 30 are not in the maintenance mode.

FIG. 7 is a flowchart showing the operation when the outside hoistway maintenance mode changeover switch 30 is operated in step S19. In the figure, it is checked in step S31 whether the hoistway maintenance switch 31 is operated. If it has been operated, the process proceeds to step S32. If it is not operated, the process proceeds to step S34, and a maintenance operation stop command is output to the elevation controller 23a, and the process ends.
If the descending operation button 31d is operated in step S32, the process proceeds to step S33, and it is checked whether the maintenance operation lower limit switch 28 is operating. If it is operating, the process proceeds to step S34, and a maintenance operation stop command is output to the elevation controller 23a. When the maintenance operation lower limit switch 28 is not operated in step S33, the process proceeds to step S35, and a maintenance operation command in the downward direction is output to the lifting control device 23a.

If the ascending operation button 31u is operated in step S32, the process proceeds to step S36, and it is checked by the output signal of the undulation detector 12 whether the safety fence 11 on the car 6 is upright. If it is standing, the process proceeds to step S37 to check whether the upper limit switch 15 for maintenance operation is operating. If it is operating, the process proceeds to step S34, and a maintenance operation stop command is output to the elevation controller 23a. If the upper limit switch 15 for maintenance operation is not activated in step S37, the process proceeds to step S35, and a maintenance operation command in the upward direction is output.
If the safety fence 11 is flattened in step S36, the process proceeds to step S38 to check whether the upper limit switch 14 for normal operation is operating. If it is operating, the process proceeds to step S34, and a maintenance operation stop command is output to the elevation controller 23a. If the upper limit switch 14 for normal operation is not activated in step S38, the process proceeds to step S35, and a maintenance operation command in the upward direction is output to the lifting control device 23a.

FIG. 8 is a flowchart showing an operation when the in-car maintenance mode changeover switch 9 is operated in step S20. In the figure, it is checked in step S51 whether the in-car maintenance operation switch 10 is operated. If it has been operated, the process proceeds to step S52. When it is not operated, the process proceeds to step S54, and a maintenance operation stop command is output to the elevation controller 23a, and the process ends.
If it is determined in step S52 that the descent operation button 10d has been operated, the process proceeds to step S53. Here, it is checked whether the lower limit switch 27 for normal operation is operating. If it is operating, the process proceeds to step S54, and a maintenance operation stop command is output to the elevation controller 23a. If the lower limit switch for normal operation 28 is not activated in step S53, the process proceeds to step S55, and a maintenance operation command in the downward direction is output to the lifting control device 23a.

If it is determined in step S52 that the ascending operation button 10u has been operated, the process proceeds to step S56. Here, it is checked whether the safety fence 11 on the car 6 is erected by the output signal of the undulation detector 12. If it is standing, the process proceeds to step S57 to check whether the upper limit switch 15 for maintenance operation is operating. If it is operating, the process proceeds to step S54, and a maintenance operation stop command is output to the elevation controller 23a. If the upper limit switch 15 for maintenance operation is not activated in step S57, the process proceeds to step S55, and a maintenance operation command in the upward direction is output.
If the safety fence 11 is flattened in step S56, the process proceeds to step S58 to check whether the upper limit switch 14 for normal operation is operating. If it is operating, the process proceeds to step S54, and a maintenance operation stop command is output to the elevation controller 23a. If the upper limit switch 14 for normal operation is not activated in step S58, the process proceeds to step S55, and the maintenance operation command in the upward direction is output to the lifting control device 23a, and the process is terminated.

According to the first embodiment, when the maintenance operation is performed by the on-car maintenance mode switching switch 17 and the on-car maintenance operation switch 18, the maintenance operation can be performed only when the safety fence 11 is upright. The upper worker 19 can be protected.
Further, since the car 6 stops the ascending operation by the operation of the upper limit switch 15 for maintenance operation, the car 6 prevents interference between the safety fence 11 and the hoistway ceiling 2 constituting the uppermost part of the hoistway or the baffle 22s, A work space on the car 6 can be secured.
Furthermore, since the car 6 can be lowered to the operating point of the lower limit switch 27 for normal operation, maintenance and inspection work can be performed over a wide range of the hoistway 1.

Further, when the car 6 is subjected to maintenance operation by the outside hoistway maintenance mode switching switch 30 and the outside hoistway maintenance operation switch 31, when the safety fence 11 is upright, the operation of the upper limit switch 15 for maintenance operation is performed. Since the ascending operation is stopped, the interference between the safety fence 11 and the uppermost part of the hoistway can be prevented.
Further, when the safety fence 11 is flat, it can be raised until the upper limit switch 14 for normal operation operates, so that maintenance operation can be performed over a wide range of the hoistway 1.
Furthermore, in the case of the descent operation, the maintenance operation is blocked at the operating point of the maintenance operation lower limit switch 28 regardless of the undulation of the safety fence 11, so the shock absorber 20 or the hoisting machine 22m constituting the lowest part of the hoistway. A collision with the car 6 can be avoided and a working space at the lowermost part of the hoistway can be secured.

Further, when the car 6 is subjected to maintenance operation by the in-car maintenance mode changeover switch 9 and the in-car maintenance operation switch 10, when the safety fence 11 is raised, the operation is raised by the operation of the upper limit switch 15 for maintenance operation. Is stopped, it is possible to prevent interference between the safety fence 11 and the top of the hoistway.
Further, when the safety fence 11 is flat, it can be raised until the upper limit switch 14 for normal operation operates, so that maintenance operation can be performed over a wide range of the hoistway 1.
Further, in the case of the descent operation, the operation can be lowered to the operating point of the lower limit switch for normal operation 27, so that a wide range of maintenance and inspection work can be performed.

Furthermore, the maintenance mode changeover switch 17 on the car is switched to the maintenance mode with the highest priority according to the steps S11, S19 and S20. Therefore, when switching to the maintenance mode on the car 6, the maintenance operation panel outside the hoistway 29 and the maintenance operation panel 8 in the car are not subjected to maintenance operation. For this reason, since the car 6 does not move up and down carelessly, it is possible to thoroughly protect the worker 19 on the car 6.
Furthermore, since the maintenance mode changeover switch 30 outside the hoistway has priority over the maintenance mode changeover switch 9 in the car, it is possible to thoroughly protect the operator 32 as well.
Furthermore, the in-car maintenance mode switching switch 9 can be switched to the maintenance mode only when both the on-car maintenance mode switching switch 17 and the outside hoistway maintenance mode switching switch 30 are not in the maintenance mode. Therefore, it can be indirectly confirmed that maintenance work is not performed on the car 6 or in the pit.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view of the uppermost part of a hoistway to which an elevator terminal safety device according to Embodiment 1 of the present invention is attached. BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view of the lowermost part of the hoistway with which the elevator terminal safety device in Embodiment 1 of this invention was mounted | worn. The hoistway longitudinal cross-sectional view which shows the cage | basket | car 6 which the upper limit switch 15 for maintenance operation which comprises the terminal safety device of the elevator in Embodiment 1 of this invention act | operated and stopped. The hoistway longitudinal cross-sectional view which shows the cage | basket | car 6 which the lower limit switch 28 for maintenance operation which comprises the terminal safety device of the elevator in Embodiment 1 of this invention act | operated and stopped. FIG. 3 is a control circuit connection diagram of the elevator terminal safety device according to Embodiment 1 of the present invention. The flowchart which shows operation | movement in the case of performing maintenance operation | movement with the maintenance mode switch 17 and the maintenance switch 18 on a car of the terminal safety device of the elevator in Embodiment 1 of this invention. The flowchart which shows operation | movement in the case of performing maintenance operation by the outside hoistway maintenance mode change-over switch 30 and the outside hoistway maintenance operation switch 31 of the elevator terminal safety device in Embodiment 1 of this invention. The flowchart which shows operation | movement in the case of performing a maintenance driving | operation with the in-car maintenance mode switch 9 and the in-car maintenance operation switch 10 of the terminal safety device for elevators in Embodiment 1 of this invention.

Explanation of symbols

1 hoistway, 2 hoistway ceiling, 3 top floor, 4 doorway, 5 landing doors, 6 car, 7 car operation panel, 8 in-car maintenance operation panel, 8a key, 9 in-car maintenance mode switch, 10 in-car maintenance Operation switch, 11 Safety fence, 12 Relief detector, 13 Cam, 14 Upper limit switch for normal operation, 15 Upper limit switch for maintenance operation, 16 Car maintenance operation panel, 17 Car maintenance mode changeover switch, 18 Car maintenance Operation switch, 19 operator, 20 shock absorber, 21 hoistway bottom, 22m hoist, 22s baffle, 22r main measures, 23 control panel, 24 bottom floor, 25 doorway, 26 landing door, 27 lower part for normal operation Limit switch, 28 Lower limit switch for maintenance operation, 29 Outside hoistway maintenance operation panel, 30 Outside hoistway maintenance mode switch, 1 hoistway outside maintenance operation switch, 32 workers.

Claims (3)

  Ridge detection for detecting the undulation of the safety fence in the elevator end safety device that prevents the car with the safety fence for the undulating work provided on the top from interfering with the uppermost part of the hoistway or the lowermost part of the hoistway An upper limit switch for normal operation that operates when the car passes the top floor and reaches the first upper fixed point to stop the car and prevent interference with the top of the hoistway, and the car When the second upper fixed point lower than the top floor is reached, the car is stopped to prevent interference between the safety fence and the top of the hoistway and to secure a work space on the car. Upper limit switch for maintenance operation and lower limit for normal operation that operates when the car passes the lowest floor and reaches the first lower fixed point to stop the car and prevent interference with the lower part of the hoistway Sui And when the car reaches a second lower fixed point higher than the lowest floor, the car is stopped to prevent interference with the lower part of the hoistway and a work space in the lower part of the hoistway A lower limit switch for maintenance operation, which is provided on the car, and is operated by human operation to switch the operation mode to the maintenance mode, and a maintenance mode changeover switch on the car, which is provided on the car and enters the maintenance mode. A car maintenance operation switch that raises and lowers the car while it is being operated when operated manually, and the undulation detector is in the standing state of the safety fence. Is detected, the operating point of the upper limit switch for maintenance operation and the lower limit for normal operation are set by operating the maintenance operation switch on the car. The elevator end safety that prevents the elevator from going up and down even if the maintenance operation switch on the car is operated when the undulation detector detects the flat state of the safety fence. apparatus.   The elevator terminal safety device according to claim 1, wherein the elevator maintenance mode changeover switch and the maintenance operation switch on the cage are switched to the maintenance mode by being operated by human operation provided at the lowest floor landing. A hoistway outside maintenance mode changeover switch, and an outside hoistway maintenance operation switch for raising and lowering the car while being operated when operated manually when being switched to the maintenance mode provided at the lowest floor landing And when the undulation detector detects the standing state of the safety fence, the operation point of the upper limit switch for maintenance operation is determined by the operation of the maintenance operation switch outside the hoistway. When the elevator detector moves up and down between the operating points of the lower limit switch for maintenance operation and the undulation detector detects the flat state of the safety fence, normal operation Terminating safety device for an elevator which is adapted to lift between the operating point and the operating point of the lower limit switch for the maintenance operation of the upper limit switch. The elevator terminal safety device according to claim 1, wherein the elevator is provided in the car and is operated by human operation to switch the operation mode to the maintenance mode, instead of the car maintenance mode switching switch and the car maintenance operation switch. A maintenance mode switching switch; and a maintenance operation switch in the car that raises and lowers the car while being operated when operated manually when the maintenance mode switch is provided and switched to the maintenance mode. When the undulation detector detects the standing state of the safety fence, the operating point of the upper limit switch for maintenance operation and the lower limit switch for normal operation are When the undulation detector detects the flat state of the safety fence, it moves up and down between the operating points. Terminating safety device for an elevator which is adapted to lift between the operating point and the normal operation point of the lower limit switch for operating the switch.

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