JPH0692568A - Safety device for elevator - Google Patents

Abstract

PURPOSE:To provide the safety device of an elevator preventing the elevator from being set to the operation stop state while passengers are confined in a cage when such cause of the operation stop of the elevator can be predicted that a speed controlling rope is extended due to the aging change to operate a detector. CONSTITUTION:If acceleration or deceleration is applied to an elevator cage 1 by the operation of an elevator when a speed governor rope 9 is extended due to the again change and a tension wheel 11 reaches a position just before the operation of a detector 17, the elastic speed governor rope 9 is expanded or shrunk by the inertial force due to the mass of a speed governor 8, the tension wheel 11, and the speed governor rope 9. If the tension wheel 11 is vertically moved by the spring effect of the speed governor rope 9 and the detector 17 is instantaneously operated, it is judged that the operating time of the detector 17 is the preset time or below and the speed controlling rope 9 is extended by the aging change, the elevator is operated to move the elevator cage 1 to the nearest floor, and the elevator is stopped after passengers get out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator safety device, and more particularly to an elevator safety device using a tensioning wheel that applies tension to a governor rope that detects the speed of an elevator car. is there.

[0002]

2. Description of the Related Art A technique disclosed in Japanese Utility Model Laid-Open No. 62-147673 can be cited as one related to a conventional safety device for an elevator of this type.

FIG. 5 is an overall configuration diagram showing a conventional elevator safety device. In the figure, 1 is an elevator car,
2 is disposed in the hoistway (not shown), and the elevator car 1
A guide rail for guiding the lifting and lowering of 3 is a hoisting rope having one end fixed to the elevator car 1 and the other end fixed to the counterweight 4,
5 is a sheave of a hoisting machine around which the hoisting rope 3 is wound, 6 is a sheave that can hoist the hoisting rope 3 and let it go to a predetermined position, 7 is a control panel that controls the movement of the elevator car 1, 8 Is a speed governor for detecting the ascending / descending speed of the elevator car 1, and 9 is a speed governor rope arranged endlessly over the entire height of the hoistway,
It is connected to the elevator car 1 by a connecting fitting 10. Numeral 11 is arranged near the bottom 12 of the hoistway, and is a tensioning wheel around which the governor rope 9 is wound, 13 is a support arm that rotatably supports the tensioning wheel 11, 14 is fixed to the guide rail 2, and support arm 13 Is fixed to the support arm 13 by a pin 15 so as to be rotatable in one direction, 16 is a weight attached to the opposite side of the support arm 13 to apply a predetermined tension to the speed governor rope 9, and 17 is a roller-shaped contact portion 17a. Is a detector whose power is shut off by being pushed by the support arm 13, and 18 is a mount for fixing the detector 17.

The conventional elevator safety device is constructed as described above, and the sheave 5 of the hoisting machine is rotated by a control signal sent from the control panel 7 and wound around the sheave 5. When the elevator car 1 fixed to one end of the hoisting rope 3 moves up and down, the governor rope 9 connected to the elevator car 1 via the connecting fitting 10 also moves in synchronization with the up and down movement of the elevator car 1. The movement of the speed governor rope 9 is transmitted to the speed governor 8 by a frictional force generated between the speed governor rope 9 and the pulley of the speed governor 8 around which the speed governor rope 9 is wound. The frictional force generated between the speed governor rope 9 and the pulley of the speed governor 8 around which the speed governor rope 9 is wound changes depending on the tension of the speed governor rope 9, and the movement of the speed governor rope 9 is accurately performed. The frictional force to be transmitted to the speed governor 8 is the pin 1 of the tension wheel 11.
It is obtained from the rope tension of the speed governor rope 9 and the weight of the speed governor rope 9 which are obtained from the rotational moment of rotation about 5.

Further, the speed governor rope 9 extends due to secular change, and the weight 16 attached to the tip of the support arm 13 comes into contact with the hoistway bottom portion 12 to rotate about the pin 15 of the tension wheel 11. When the speed governor rope 9 does not occur, the rope tension of the speed governor rope 9 decreases, so the frictional force generated between the speed governor rope 9 and the pulley of the speed governor 8 decreases, and the speed governor rope 9 and Slip occurs between the speed governor 8 and the pulley, and the movement of the speed governor rope 9 cannot be transmitted to the speed governor 8. Therefore, before the weight 16 comes into contact with the hoistway bottom portion 12 due to an abnormality such as extension of the governor rope 9 or breakage of the governor rope 9, the contact portion 17a of the detector 17 is supported by the supporting arm. 13 and the contact portion 17a is moved so that the detector 17
Is turned off, the safety circuit (not shown) of the elevator is cut off, and the operation of the elevator is stopped.

[0006]

In the conventional elevator safety device as described above, there is a secular change when the detector 17 is switched from the ON state to the OFF state due to an accident such as breakage of the governor rope 9. The speed governor rope 9 is extended by the detector 1
Without distinguishing from the case where 7 turned from the ON state to the OFF state, the elevator safety circuit (not shown) was cut off to stop the elevator operation. Therefore, tension is applied to the governor rope 9, and it is not necessary to stop the operation immediately for safety reasons.
Was extended and the detector 17 was turned off from the on state, the elevator operation was immediately stopped.

For this reason, while the passenger is in the elevator car 1 and the elevator is in operation, the speed governor rope 9 extends due to aging and the detector 17 is about to change from the ON state to the OFF state. When the detector 17 is moved up and down and the detector 17 is switched from the ON state to the OFF state, the passenger in the elevator car 1 is in the elevator car 1 because the operation of the elevator is stopped. Passengers were unable to get out of elevator car 1 until they were confined to and rescue operations were carried out.

Therefore, according to the present invention, when it is possible to predict the cause of the operation stop of the elevator such that the governor rope 9 stretches due to aging and the detector 17 operates, the elevator is driven to the nearest floor. An object of the present invention is to provide an elevator safety device that does not put an elevator into a stopped state while keeping passengers in the car by stopping the elevator in the car and then stopping the elevator.

Further, even when the elevator is driven by the above-mentioned predictable cause, the speed governor rope 9 is approaching an abnormal state, so that the elevator is operated at a speed lower than the rated ascending / descending speed. Therefore, it is an object to provide a safety device for an elevator that can increase safety when operating the elevator.

Further, whether the speed governor rope 9 is extended and the detector 17 is activated due to aging, or the speed governor rope 9 is operated.
If it is judged after the elevator is stopped whether the detector is broken and the detector 17 is activated, it is possible to more accurately determine the state in which the speed governor rope 9 is extended and the detector 17 is activated. It is an object to provide a reliable elevator safety device.

Further, when the elevator stops due to the above-mentioned predictable cause, passengers and the like are informed that the elevator is out of order by a predetermined means so that the service to the customer can be improved. It is an object to provide a device.

[0012]

According to a first aspect of the present invention, there is provided a safety device for an elevator, wherein a tension wheel is pivotally supported on the other end of an arm body, one end of which is pivotally attached to a fixed body. Governor rope to which tension is applied, a detector that operates when the rotation angle of the arm exceeds a predetermined value, operation time detection means that detects the operation time of the detector, and the operation time. Is within a predetermined time, the elevator car is driven to the nearest floor, and the elevator control is stopped after the passengers in the car are lowered.

According to a second aspect of the present invention, there is provided an elevator safety device including a tension wheel, a speed governor rope,
In addition to the detector and the operating time detecting means, when the operating time of the detector is within a predetermined time, the elevator car is operated to the nearest floor at a speed slower than the rated speed, and after the passenger in the car is lowered, the elevator car is lowered. The operation control means for stopping the operation of 1) is provided.

According to a third aspect of the present invention, there is provided an elevator safety device in which, in addition to the tension wheel, the speed governor rope, the detector and the operating time detecting means, which are the same as those in the first and second aspects, the detector operates. Then, the elevator car is temporarily stopped, and then, when the operation time of the detector is within a predetermined time, the elevator car is operated to the nearest floor, and the elevator car is stopped after the passengers in the car are lowered. The operation control means is provided.

According to a fourth aspect of the present invention, there is provided an elevator safety device including a tension wheel, a speed governor rope, a detector, an operating time detecting means, and the same as in the first to third aspects.
In addition to the operation control means similar to the above, a failure notification means for notifying the failure of the elevator after the operation of the elevator car is stopped is provided.

[0016]

In the elevator safety device according to the first aspect of the present invention, the operating time of the detector that detects that the tensioning wheel that applies tension to the governor rope is at a predetermined position is detected,
If the operating time of the detector is within the specified time, the elevator car that is in operation will be driven to the nearest floor, the elevator will be stopped after the passengers in the car have been lowered, and so the governor When the rope stretches due to secular change and the tensioning wheel reaches just before the detector operates, the tensioning wheel moves up and down due to the spring effect of the governor rope and the detector momentarily operates, and the governor rope disconnects. If the speed governor rope stretches due to secular change, it is necessary to stop the elevator operation immediately without distinguishing it from the case where the tension wheel falls below a predetermined position and the detector does not return. , Drive the elevator car to the nearest floor, remove passengers and then stop the elevator.

In the elevator safety device according to the second aspect of the present invention, when the detector for detecting the position of the tension vehicle operates and the elevator can be operated, the operating speed of the elevator car is slower than the rated speed. Since the elevator is then driven, the elevator can be driven in consideration of the fact that the governor rope is approaching an abnormal state even when the elevator is driven for a predictable cause.

In the elevator safety device according to the third aspect of the present invention, after the detector for detecting the position of the tension vehicle is activated, the elevator car is temporarily stopped, and then the operating time of the detector is within a predetermined time. In this case, the elevator car is driven to the nearest floor, and the elevator is stopped after the passengers in the car are lowered.Therefore, whether the speed governor rope stretched due to secular change and the detector operated, It can be determined after stopping the elevator whether the speed governor rope breaks and the detector has operated, the difference in the operating time of the detector can be accurately detected, and the speed governor rope extends more accurately and the detector You can determine the operating state.

In the elevator safety device according to a fourth aspect of the present invention, when the detector for detecting the position of the tension vehicle operates and the elevator can be operated, the elevator car in operation is driven to the nearest floor. However, after the passenger in the car is lowered and the operation of the elevator car is stopped, the failure of the elevator is notified, so that the passenger or the like can be notified that the elevator is stopped due to the failure.

[0020]

Embodiments of the present invention will be described below. <First Embodiment> FIG. 1 is an overall configuration diagram showing an elevator safety device according to a first embodiment of the present invention. In the figure, the same reference numerals and symbols as those of the above-mentioned conventional example indicate the same or corresponding components as those of the above-mentioned conventional example. 2A and 2B are time charts for explaining the traveling state of the elevator car and the operating state of the movement detector of the tension vehicle. FIG. 2A shows the relationship between the elevator speed and time, and FIG. 2B shows the vertical movement amount of the tension vehicle. The relationship with time is shown, and (c) shows the operating time of the detector.

In the figure, reference numeral 19 indicates a count of the operation time t17 when the detector 17 is OFF, a part for storing a preset time T2, and a length of the operation time t17 of the detector 17 and the stored and set time T2. Is a microcomputer for invalidating the function of the detector 17 in accordance with the result of comparison between times t17 and T2. Other than this microcomputer 19, it has the same configuration as the conventional device.

In the elevator safety device of this construction, when the governor rope 9 is stretched over time and the tensioning wheel 11 is lowered and the support arm 13 reaches the position just before the detector 17 is in the operating position, When the acceleration / deceleration acts on the elevator car 1 by the operation of the elevator as shown in a), the elastic speed governor rope 9 is moved by the inertia force due to the mass of the speed governor 8, the tension wheel 11, and the speed governor rope 9. Expand and contract. Due to the spring effect of the speed governor rope 9, the tension wheel 11 moves up and down as shown in FIG. 2B, and the tension wheel 11 moves below the distance L from the stop position to the operating position of the detector 17. During the period, the detector 17 is activated and turned off as shown in FIG. 2 (c). Therefore, in this embodiment, the detector 17 is turned off.
The time t17 of the state is compared with the time T2 which is previously set and stored in the microcomputer 19 by a test or the like, and the operation of the elevator is appropriately controlled. Elevator car 1 in that case
The operation control operation of is shown in FIG.

FIG. 3 is a flow chart for explaining the operation control operation of the elevator when the detector for detecting the movement of the tension vehicle of the elevator safety device according to the first embodiment of the present invention is activated. In the figure, first, in step S1, the operating state of the detector 17 is determined. Detector 17 is activated and OF
In the case of the F state, it is determined in step S2 whether the elevator car 1 is running or stopped. Detector 17 is OF
If it is F and the elevator car 1 is traveling, the length of the operating time t17 of the detector 17 and the time T2 stored in advance in the microcomputer 19 are compared and determined in step S3. If the operating time T17 of the detector 17 is shorter than the preset time T2, the process proceeds to step S4,
The operation of the detector 17 is disabled in order to prevent the detector 17 from detecting the OFF state again due to the wobbling of the tension vehicle 11 that occurs while the elevator car 1 is running. Then, in step S5, the elevator car 1 is driven to the nearest floor to land properly, and after stopping the elevator car 1, the elevator car 1 and the door of the elevator hall (not shown) are opened in step S6, and the elevator car 1 is opened. Unload passengers in car 1. In step S7, the doors of the elevator car 1 and the elevator hall (not shown) are closed to prevent passengers from getting into the elevator car 1 again after a predetermined time has passed since the door was opened. Thereafter, in step S8, it is determined whether or not the door open button in the elevator car 1 has been pressed, and it is determined whether or not there are any passengers left in the elevator car 1. If the door open button of the elevator car 1 is not pressed, the elevator stops operating in step S9. Thus, after stopping the operation of the elevator, an alarm device or the like automatically notifies that an abnormality has occurred in the elevator in step S12.

On the other hand, if the detector 17 remains off due to the break of the governor rope 9 in step S3, the operating time t17 of the detector 17 is longer than the preset time T2. Therefore, it is determined to be abnormal, the process proceeds to step S10, the safety circuit of the elevator is activated, and the elevator is stopped in an emergency in step S11.

As described above, the elevator safety device according to the present embodiment includes the tension wheel 11 which is pivotally supported on the other end of the arm body such as the support arm 13 whose one end is pivotally attached to the fixed body such as the fixing bracket 14. A speed governor rope 9 to which a predetermined tension is applied by the tension wheel 11, a detector 17 that operates when the rotation angle of the support arm 13 (arm body) exceeds a predetermined value, and the detector 17
When the operating time t17 is within a predetermined time T2, the elevator car 1 is driven to the nearest floor and passengers in the car are detected. Operation control means for performing the operations of steps S3 to S9 in FIG. 3 for stopping the operation of the elevator after the vehicle is unloaded is provided.

That is, the elevator safety device of this embodiment detects the operation time of the detector 17 which detects that the tensioning wheel 11 for applying tension to the speed governor rope 9 has reached a predetermined position, and detects it. If the operation time of the container 17 is within a predetermined time, the elevator car 1 in operation is driven to the nearest floor, the passengers in the car are lowered, and then the operation of the elevator is stopped.

Therefore, when the speed governor rope 9 stretches due to secular change and the tension wheel 11 reaches just before the operation of the detector 17, when the acceleration / deceleration acts on the elevator car 1 during operation of the elevator, the speed governor 8 , Tension vehicle 11, speed governor rope 9
In the case where the elastic governor rope 9 expands and contracts due to the inertial force due to the mass, and the tensioner 11 moves up and down due to the spring effect of the governor rope 9, the detector 17 momentarily operates. It is determined that the operation time of 17 is less than or equal to a predetermined time, and the governor rope 9 extends due to secular change,
The elevator is operated, the elevator car 1 is driven to the nearest floor, the passenger is lowered, and the elevator is stopped. In addition, when the speed governor rope 9 is cut or the tension wheel 11 is below a predetermined position and the detector 17 does not operate and does not return, it is determined to be abnormal and the safety circuit of the elevator is activated. , Stop the elevator in an emergency.

As a result, the speed governor rope 9 changes with time.
When it is possible to predict the cause of the elevator stoppage that causes the detector 17 to operate, the elevator is driven to the nearest floor, the passengers in the car are lowered, and then the elevator is stopped. Since the elevator is not stopped while the passengers are kept inside, anxiety and dissatisfaction with the passengers can be eliminated, and the service is improved.

<Second Embodiment> FIG. 4 illustrates another operation control operation of the elevator when the detector for detecting the movement of the tension vehicle of the elevator safety device according to the second embodiment of the present invention is activated. It is a flowchart. In the figure, the same reference numerals and symbols as those in the first embodiment denote the same or corresponding components as those of the first embodiment. Since FIGS. 1 and 2 are common to the first embodiment, the description thereof is omitted here.

In this embodiment, step S30 is added after step S4. In step S30, the elevator car 1 is operated at a speed lower than the rated speed. That is, in the first embodiment, the speed at which the elevator car 1 is driven to the nearest floor is not specified, but in this embodiment, the driving speed to the nearest floor is lower than the rated speed. Is configured to. The rest of the configuration is the same as that of the first embodiment.

As described above, the elevator safety device according to the present embodiment includes the tension wheel 11 pivotally supported on the other end of the arm body such as the support arm 13 whose one end is pivotally attached to the fixed body such as the fixing bracket 14. A speed governor rope 9 to which a predetermined tension is applied by the tension wheel 11, a detector 17 that operates when the rotation angle of the support arm 13 (arm body) exceeds a predetermined value, and the detector 17
A counter (operating time detecting means) of the microcomputer 19 for detecting the operating time t17 of the elevator car, and when the operating time t17 is within a predetermined time T2, the elevator car 1 is operated at a speed lower than the rated speed to the nearest floor. (Step S30 in FIG. 4), and operation control means for performing the operations in steps S3 to S9 in FIG. 4 for stopping the operation of the elevator after lowering the passengers in the car.

That is, the safety device for an elevator according to the present embodiment detects the operation time of the detector 17 which detects that the tensioning wheel 11 for applying tension to the governor rope 9 is in a predetermined position, and detects the operation time. If the operation time of the container 17 is within a predetermined time, the elevator car 1 in operation is driven to the nearest floor at a speed slower than the rated speed, and the passengers in the car are lowered,
The operation of the elevator is stopped.

Therefore, even when the elevator is operated for a predictable cause, it is possible to operate the elevator taking into consideration that the governor rope 9 is approaching an abnormal state. As a result, the speed governor rope 9 is stretched, and the elevator that is operated in an abnormally close state can be operated more safely, which further increases safety.

<Third Embodiment> FIG. 4 illustrates another operation control operation of the elevator when the detector for detecting the movement of the tension vehicle of the elevator safety device according to the third embodiment of the present invention is activated. It is a flowchart. In the figure, the same reference numerals and symbols as those of the first and second embodiments indicate the same or corresponding constituent parts as those of the first and second embodiments. Note that FIG.
Since FIG. 2 and FIG. 2 are common to the first and second embodiments, the description thereof will be omitted here.

In this embodiment, step S20 is added before the determination in step S3.
At 0, elevator car 1 is stopped. That is, in the first embodiment described above, the determination in step S3 is performed while the elevator car 1 is traveling, but in this embodiment, if the elevator car 1 is traveling in step S2, step S2 is performed.
After stopping the elevator car 1 at 0, step S
3, the operation time t17 of the detector 17 and the time T2 stored in advance in the microcomputer 19 are compared and determined. The rest of the configuration is the same as that of the first embodiment.

As described above, the elevator safety device according to the present embodiment has the tension wheel 11 pivotally supported on the other end of the arm body such as the support arm 13 whose one end is pivotally attached to the fixed body such as the fixing metal fitting 14. A speed governor rope 9 to which a predetermined tension is applied by the tension wheel 11, a detector 17 that operates when the rotation angle of the support arm 13 (arm body) exceeds a predetermined value, and the detector 17
The counter (operating time detecting means) of the microcomputer 19 that detects the operating time t17 of the elevator car 1 and the elevator car 1 are temporarily stopped when the detector 17 operates (see FIG. 4).
Step S20) of the above, after that, when the operation time t17 of the detector 17 is within the predetermined time T2, the elevator car 1 is driven to the nearest floor, and the elevator is stopped after the passengers in the car are lowered. 4 and operation control means for performing the operations of steps S3 to S9.

That is, in the elevator safety device of this embodiment, the elevator car is operated after the detector 17 for detecting that the tensioning wheel 11 for applying tension to the governor rope 9 is in a predetermined position. 1 is temporarily stopped, and thereafter, when the operation time of the detector 17 is within a predetermined time, the elevator car 1 is operated to the nearest floor, the passengers in the car are lowered, and then the operation of the elevator is stopped. .

Therefore, it is determined after the elevator is stopped whether the speed governor rope 9 is extended and the detector 17 is operated due to aging, or the speed governor rope 9 is broken and the detector 17 is operated. The detector 1
It is possible to accurately detect the difference in the operating time of No. 7. As a result, it is possible to more accurately determine the state in which the speed governor rope 9 extends and the detector 17 operates, so that the rate of erroneous determination decreases and the reliability increases.

<Fourth Embodiment> FIGS. 3 and 4 explain the operation control operation of an elevator when a detector for detecting the movement of a tension wheel of an elevator safety device according to a fourth embodiment of the present invention is activated. It is a flowchart to do. In the figure, the same reference numerals and symbols as those of the above-mentioned respective embodiments indicate the same or corresponding constituent parts as those of the above-mentioned respective embodiments. 1 and 2
Is common to each of the above-mentioned embodiments, and therefore its explanation is omitted here.

As shown in FIGS. 3 and 4, in this embodiment, after the operation of the elevator car 1 is stopped in step S9, a failure of the elevator is notified in step S12. The other configurations are the same as those of the above-described embodiments.

As described above, the elevator safety device according to the present embodiment includes the tension wheel 11 which is pivotally supported on the other end of the arm body such as the support arm 13 whose one end is pivotally attached to the fixed body such as the fixing bracket 14. A speed governor rope 9 to which a predetermined tension is applied by the tension wheel 11, a detector 17 that operates when the rotation angle of the support arm 13 (arm body) exceeds a predetermined value, and the detector 17
When the operating time t17 is within a predetermined time T2, the elevator car 1 is driven to the nearest floor and passengers in the car are detected. Operation control means for performing the operations of steps S3 to S9 of FIG. 3 or FIG. 4 for stopping the operation of the elevator after unloading, and FIG. 3 or FIG. 3 for notifying the failure of the elevator after stopping the operation of the elevator car 1. And a failure notification means for performing the operation of step S12 of 4.

That is, in the elevator safety device according to the present embodiment, when the detector 17 for detecting the position of the tensioning wheel 11 that applies tension to the governor rope 9 operates and the elevator can be operated, The elevator car 1 being operated is driven to the nearest floor, passengers in the car are lowered, and the elevator car 1 is stopped, and then the elevator is informed of failure.

Therefore, when the elevator stops due to a predictable cause, passengers and the like can be informed that the elevator is out of order by a predetermined failure notification means, and service to customers can be improved. Moreover, it is possible to promptly notify the elevator maintenance department and shorten the time until the elevator is restored to operation. As a result, services for elevator users and managers are improved.

[0044]

As described above, the elevator safety device according to the invention of claim 1 comprises a tensioning wheel, a governor rope,
A detector, an operation time detection means, and an operation control means, which detects the operation time of the detector that detects that the tensioning wheel that applies tension to the governor rope has reached a predetermined position, If the operating time of is within the specified time, drive the operating elevator car to the nearest floor, lower the passengers in the car, and then stop the elevator operation. If you can predict the cause of the elevator shutdown, which causes the detector to operate, the elevator will be driven to the nearest floor, the passengers in the car will be dropped, and the elevator will be stopped. The elevator will not be stopped while the passengers are kept inside, and the anxiety and dissatisfaction with the passengers can be eliminated and the service will be improved.

An elevator safety device according to a second aspect of the present invention includes a tension vehicle, a governor rope, a detector, an operating time detecting means, and an operation control means, and detects the position of the tension vehicle. When the elevator operates and the elevator can be operated, the elevator car is operated at a slower speed than the rated speed, even when the elevator is operated for a predictable cause. Since the elevator can be operated taking into consideration that the governor rope is approaching an abnormal state, it is possible to safely drive an elevator that is operated in a state where the governor rope extends and is in an abnormal state. , The safety is further increased.

An elevator safety device according to a third aspect of the present invention comprises a tension vehicle, a governor rope, a detector, an operating time detecting means, and an operation control means, and detects the position of the tension vehicle. After the operation of the elevator, the elevator car is temporarily stopped, and then, when the operating time of the detector is within the predetermined time, the elevator car is operated to the nearest floor, the passengers in the car are lowered, and then the elevator is operated. By stopping the, it can be determined after stopping the elevator whether the speed governor rope stretches due to aging and the detector operates, or whether the speed governor rope breaks and the detector operates. The difference in operating time can be accurately detected, and the state in which the governor rope is extended and the detector is operating can be more accurately determined, so the rate of erroneous determination is reduced and reliability is increased.

An elevator safety device according to a fourth aspect of the present invention comprises a tension vehicle, a governor rope, a detector, an operating time detection means, an operation control means, and a failure notification means. If the detector that detects the position is activated and the elevator can be operated, the elevator car in operation is driven to the nearest floor, the passengers in the car are lowered, and the elevator car is stopped. By notifying the failure, passengers and the like can be notified that the elevator has stopped due to a failure, so that the service to the elevator user and the manager is improved.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a safety device for an elevator that is an embodiment of the present invention.

FIG. 2 is a time chart explaining an operating state of a detector for detecting the traveling of the elevator car and the movement of the tension vehicle, for explaining the elevator safety device according to each embodiment of the present invention.

FIG. 3 is a flow chart for explaining an operation control operation of the elevator when a detector for detecting movement of the tension vehicle of the elevator safety device according to the first and fourth embodiments of the present invention is activated.

FIG. 4 is a flowchart illustrating another operation control operation of the elevator when the detector that detects the movement of the tension vehicle of the elevator safety device according to the second to fourth embodiments of the present invention is activated. is there.

FIG. 5 is an overall configuration diagram showing a conventional elevator safety device.

[Explanation of symbols]

 1 elevator car 2 guide rail 3 hoisting rope 4 counterweight 5 sheave 6 sheave wheel 7 control panel 8 speed governor 9 speed governor rope 10 connecting bracket 11 tensioning wheel 12 hoistway bottom 13 support arm 14 fixing bracket 15 Pin 16 Weight 17 Detector 17a Contact part 18 Mounting base 19 Microcomputer

Front page continuation (72) Inventor Motoo Shimoaki 1 Hishimachi, Inazawa, Aichi Prefecture Inazawa Works, Mitsubishi Electric Corporation

Claims (4)

[Claims] 1. A tension wheel having one end pivotally supported by the other end of an arm body pivotally attached to a fixed body, a governor rope to which a predetermined tension is applied by the tension wheel, and a rotation of the arm body. A detector that operates when the angle exceeds a predetermined value, an operation time detection unit that detects the operation time of the detector, and when the operation time is within a predetermined time, drive the elevator car to the nearest floor. An elevator safety device, comprising: an operation control unit that stops the operation of the elevator after the passengers in the car are lowered. 2. A tension wheel having one end pivotally supported by the other end of an arm body pivotally attached to a fixed body, a speed governor rope to which a predetermined tension is applied by the tension wheel, and a rotation of the arm body. A detector that operates when the angle exceeds a predetermined value, an operation time detection unit that detects the operation time of the detector, and an elevator car to the nearest floor when the operation time is within a predetermined time. An elevator safety device, comprising: an operation control unit that operates at a slower speed and stops the operation of the elevator after unloading passengers in the car. 3. A tensioning wheel having one end pivotally supported by the other end of an arm body pivotally attached to a fixed body, a speed governor rope to which a predetermined tension is applied by the tensioning wheel, and rotation of the arm body. A detector that operates when the angle exceeds a predetermined value, an operation time detection unit that detects an operation time of the detector, and when the detector operates, temporarily stops the elevator car, and then the detector. When the operating time of is within a predetermined time, the elevator car is driven to the nearest floor, and operation control means for stopping the operation of the elevator after lowering passengers in the car is provided. apparatus. 4. A tensioning wheel having one end pivotally supported by the other end of an arm body pivotally attached to a fixed body, a governor rope to which a predetermined tension is applied by the tensioning wheel, and rotation of the arm body. A detector that operates when the angle exceeds a predetermined value, an operation time detection unit that detects the operation time of the detector, and when the operation time is within a predetermined time, drive the elevator car to the nearest floor. , An operation control means for stopping the operation of the elevator after lowering the passengers in the car, and a failure notification means for notifying the failure of the elevator after stopping the operation of the elevator car, Safety device.