JP5191907B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus having a safety monitoring unit that detects an abnormal situation related to driving based on signals from a plurality of sensors.

  In the conventional elevator apparatus, when the car is lifted and lowered with the car door opened, the wedge-type emergency stop device is electrically braked by signals from the car door opening / closing sensor and the car speed sensor. As a result, the time until the braking force is generated is reduced (for example, see Patent Document 1).

WO2004 / 083091

  However, the braking force of the emergency stop device is set so as to correspond to the sum of the weight of the car and the loaded weight when the main rope is cut. When the stopping device is braked, the impact during deceleration increases. On the other hand, in the conventional elevator apparatus, it is not possible to set in detail what kind of braking method is selected according to the type of abnormal situation, and there is a risk of stopping the car with an unnecessarily large deceleration. It was.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain an elevator apparatus capable of stopping a car with an appropriate braking force according to the type of abnormal situation.

  An elevator apparatus according to the present invention relates to a car that is raised and lowered in a hoistway, a plurality of types of braking devices that decelerate and stop a car, a plurality of sensors that detect states of a plurality of elevator devices, and driving based on signals from the sensors. A safety monitoring unit that detects an abnormal situation and selectively brakes the braking device according to the type of the abnormal situation is provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a block diagram which shows in detail the relationship between the hoisting machine brake of FIG. 1, a main brake control apparatus, and a deceleration reduction brake control apparatus. It is a circuit diagram which shows the control circuit of the hoisting machine brake of FIG. It is a block diagram which shows the emergency stop apparatus of FIG. It is sectional drawing which follows the VV line of FIG. It is a flowchart which shows the braking device selection operation | movement of the safety monitoring part of FIG. It is explanatory drawing which shows the relationship between the state of the various sensors of FIG. 1, and the braking device selected by the safety monitoring part. It is a block diagram which shows the elevator apparatus by Embodiment 2 of this invention. It is a flowchart which shows the braking device selection operation | movement of the safety monitoring part of FIG. It is explanatory drawing which shows the relationship between the state of the various sensors of FIG. 8, and the braking device selected by the safety monitoring part. It is a flowchart which shows the braking device selection operation | movement of the safety monitoring part by Embodiment 3 of this invention. It is explanatory drawing which shows the relationship between the state of the various sensors in Embodiment 3, and the braking device selected by the safety monitoring part. It is a flowchart which shows the braking device selection operation | movement of the safety monitoring part by Embodiment 4 of this invention. It is explanatory drawing which shows the relationship between the state of the various sensors in Embodiment 4, and the braking device selected by the safety monitoring part. It is a block diagram which shows the elevator apparatus by Embodiment 5 of this invention. It is a flowchart which shows the braking device selection operation | movement of the safety monitoring part of FIG.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a car 1 and a counterweight 2 are suspended in a hoistway by a main rope 3 and are raised and lowered in the hoistway by a driving force of a hoisting machine 4. In the hoistway, a pair of car guide rails 9 (FIG. 4) for guiding the raising and lowering of the car 1 and a pair of counterweight guide rails (not shown) for guiding the raising and lowering of the counterweight 2 are installed. ing.

  The hoisting machine 4 includes a driving sheave 5 around which the main rope 3 is wound, a motor 6 that rotates the driving sheave 5, and a hoisting machine brake 7 that serves as a braking device that brakes the rotation of the driving sheave 5. . The car 1 is equipped with an emergency stop device 8 as a braking device that holds the car guide rail 9 and brakes the car 1. The hoisting machine brake 7 and the emergency stop device 8 are electrically operated in response to a braking command signal.

  The motor 6 is provided with a hoisting machine speed detector 15 that generates a signal corresponding to the rotational speed of its rotating shaft, that is, the rotational speed of the drive sheave 5. As the hoisting machine speed detector 15, for example, an encoder or a resolver is used.

  Electric power is supplied to the motor 6 from a power converter 16 such as an inverter. The hoisting machine brake 7 is controlled by a main brake control device 17. The power conversion device 16 and the main brake control device 17 are controlled by the operation control device 18. The operation control device 18 controls the power conversion device 16 and the main brake control device 17 in accordance with a signal from the hoisting machine speed detector 15.

  Further, the braking force of the hoisting machine brake 7 can be controlled by the deceleration reduction brake control device 19. When a command for suddenly stopping the car 1 is generated, the deceleration reduction brake control device 19 monitors the deceleration of the car 1 based on a signal from the hoisting machine speed detector 15 and determines the deceleration of the car 1. The braking force of the hoisting machine brake 7 is controlled so as to keep it below a predetermined value.

  The emergency stop device 8 is controlled by the emergency stop control device 20. The power conversion device 16, the main brake control device 17, and the emergency stop control device 20 are controlled by the safety monitoring unit 22. The safety monitoring unit 22 detects an abnormal situation (dangerous event) related to driving based on signals from a plurality of sensors that detect states of a plurality of elevator devices, and the hoisting machine brakes 7 and 7 according to the type of the abnormal situation. The emergency stop control device 20 is selectively braked. Further, when an abnormal situation is detected, the safety monitoring unit 22 cuts off the power supply to the motor 6 by the power conversion device 16.

  The sensor used in the first embodiment includes a plurality of landing door switches 23, a car door switch 24, and a governor speed detector 25. Each landing door switch 23 detects opening / closing of a corresponding landing door. The car door switch 24 detects opening and closing of the car door. The governor speed detector 25 generates a signal corresponding to the rotational speed of the governor sheave 26 that rotates in conjunction with the raising and lowering of the car 1. Further, instead of the governor speed detector 25, a signal from the hoisting machine speed detector 15 may be input to the safety monitoring unit 22.

  The operation control device 18, the main brake control device 17, the deceleration reduction brake control device 19, the emergency stop control device 20, and the safety monitoring unit 22 are an arithmetic processing unit (CPU, etc.), a storage unit (ROM, RAM, hard disk, etc.) and Each computer has a signal input / output unit. The functions of the operation control device 18, the main brake control device 17, the deceleration reduction brake control device 19, the emergency stop control device 20, and the safety monitoring unit 22 can be realized by calculation processing by a computer.

  FIG. 2 is a block diagram showing in detail the relationship between the hoisting machine brake 7, the main brake control device 17 and the deceleration reduction brake control device 19 of FIG. The hoisting machine brake 7 includes a brake shoe 12 that is brought into contact with and separated from a brake wheel 10 that is rotated integrally with the drive sheave 5, a brake spring 13 that presses the brake shoe 12 against the brake wheel 10, and a brake shoe against the brake spring 13. 12 is a friction brake device having a brake coil 14 that dissociates 12 from the brake wheel 10.

  The main brake control device 17 controls the hoisting machine brake 7 in accordance with a command from the operation control device 18. That is, during normal operation, when an activation signal is received from the operation control device 18, energization to the brake coil 14 is started and the hoisting machine brake 7 is released. When the car 1 is stopped at the stop floor, a stop signal is received from the operation control device 18, the energization to the brake coil 14 is cut off, the hoisting machine brake 7 is braked, and the car 1 is kept stationary.

  Even when a command for suddenly stopping the car 1 is issued from the safety monitoring unit 22, the main brake control device 17 cuts off the power supply to the brake coil 14 and causes the hoisting machine brake 7 to perform a braking operation.

  At this time, if the deceleration of the car 1 estimated based on the signal from the hoisting machine speed detector 15 exceeds a predetermined value, the deceleration reduction brake connected to the brake coil 14 in parallel with the main brake controller 17. Independently of the main brake control device 17, the control device 19 starts energization of the brake coil 14 of the hoisting machine brake 7, reduces the braking force, and controls the car deceleration to approach a predetermined value. Then, the car 1 is decelerated and stopped. Thereby, the deceleration shock when the hoisting machine brake 7 performs a braking operation can be reduced, and the influence on the passenger can be reduced.

  FIG. 3 is a circuit diagram showing a control circuit of the hoisting machine brake 7 of FIG. A main brake control device 17 and a deceleration reduction brake control device 19 are connected to the brake coil 14 in parallel. That is, if power is supplied from at least one of the main brake control device 17 and the deceleration reduction brake control device 19, the braking force of the hoisting machine brake 7 is released.

  The main brake control device 17 supplies power to the brake coil 14 from the first power supply 28 by closing the pair of main contacts 27. A first semiconductor switch 29 such as a MOS-FET is connected between the first power supply 28 and the main contact 27. The first semiconductor switch 29 generates an average voltage corresponding to the ratio of ON-OFF time by switching at high speed (step-down chopper). The first semiconductor switch 29 is controlled by a command signal generated by a computer of the operation control device 18.

  The first reflux diode 30 is connected to the first power supply 28 in parallel with the brake coil 14. The first freewheeling diode 30 protects the circuit from the counter electromotive force generated in the brake coil 14.

  The deceleration reduction brake control device 19 supplies power to the brake coil 14 from the second power supply 32 by closing the pair of deceleration control contacts 31. A second semiconductor switch 33 such as a MOS-FET and a resistor 34 as a current limiting resistor are connected between the second power supply 32 and the deceleration control contact 31. The second semiconductor switch 33 generates an average voltage corresponding to the ratio of ON-OFF time by switching at high speed (step-down chopper). The second semiconductor switch 33 is controlled by a command signal generated by a computer of the deceleration reduction brake control device 19.

  The resistor 34 limits the current flowing through the brake coil 14 even when an ON failure occurs in the second semiconductor switch 33. The second reflux diode 35 is connected to the second power supply 32 in parallel with the brake coil 14. Further, the second freewheeling diode 35 protects the circuit from the counter electromotive force generated in the brake coil 14.

  A circuit in which a diode 36 and a resistor 37 are connected in series is connected to the brake coil 14 in parallel. The circuit including the diode 36 and the resistor 37 quickly consumes the back electromotive force generated in the brake coil 14 when the main contact 27 or the deceleration control contact 31 is opened.

  4 is a block diagram showing the safety device 8 of FIG. 1, and FIG. 5 is a cross-sectional view taken along line VV of FIG. An attachment frame 47 is attached to the car 1. An upper guide rod 48 a and a lower guide rod 48 b are attached to the attachment frame 47. The upper and lower guide rods 48a and 48b are arranged in parallel and horizontally with a space in the vertical direction.

  A housing 42 is provided inside the mounting frame 47. Slide guides 42 a to 42 d are provided above and below the housing 42. An upper guide rod 48a passes through the slide guides 42a and 42c. A lower guide rod 48b passes through the slide guides 42b and 42d. Thereby, the housing 42 can slide to the left and right with respect to the mounting frame 47 along the guide rods 48a and 48b.

  A movable rail 41 is mounted on one side of the housing 42 with respect to the car guide rail 9 while ensuring a predetermined gap with respect to the car guide rail 9. 41 per movable rail is rotatably attached to a main shaft 43 attached to the housing 42.

  The outer peripheral portion on the car guide rail 9 side with respect to the rotation center Cn of the movable rail 41 is centered on the upper cylindrical surface 41a centered on the position Pup offset upward from the rotation center Cn and the position Pdn offset downward. The lower cylindrical surface 41b and the rail contact part 41c which connects between these cylindrical surfaces 41a and 41b are provided. An upper braking shoe 44a is provided adjacent to the upper end of the upper cylindrical surface 41a. Further, a lower braking shoe 44b is provided adjacent to the lower end of the lower cylindrical surface 41b.

  The center Pup of the upper cylindrical surface 41a is located near the Y axis in the second quadrant of the XY coordinate centered on the center Cn, and the center Pdn of the lower cylindrical surface 41b is located near the Y axis in the third quadrant. ing.

  On the other side of the car guide rail 9 of the housing 42, 45 per fixed rail is mounted with a predetermined clearance with respect to the car guide rail 9. 41 per movable rail and 45 per fixed rail face each other across the car guide rail 9. A pressing element 46 is provided on the side of the anti-car guide rail 9 that is 45 per fixed rail. The pressing element 46 has a plurality of disc springs, for example, and is fixed to the housing 42.

  A plurality of elastic elements 49 a and 49 b are provided between the slide guides 42 a and 42 b and the left end portion of the mounting frame 47. As the elastic elements 49a and 49b, for example, coil springs surrounding the guide rods 48a and 48b are used.

  On the side of the mounting frame 47 opposite to the housing 42, a holding / release mechanism 50 (FIG. 5) for the elastic elements 49a, 49b is provided. The structure of the holding / release mechanism 50 is as follows. That is, the fixed iron core 52 is fixed to the mounting frame 47. A coil 51 is incorporated in the fixed iron core 52. A movable iron core 53 is disposed at one end of the fixed iron core 52. The fixed iron core 52, the coil 51, and the movable iron core 53 constitute an electromagnetic magnet 54.

  A push pin 55 is fixed at the center of the movable iron core 53. The push pin 55 passes through the center of the fixed iron core 52. A plurality of adjustment nuts 58 are screwed onto the push pin 55. By adjusting the position of the adjustment nut 58, the size of the gap between the movable iron core 53 and the fixed iron core 52 can be set to a predetermined value.

  Further, a holding lever 57 that can swing is connected to the fixed iron core 52 via a rotation support pin 56. A clearance distribution adjusting bolt 59 is screwed to the side of the housing 42 opposite to the car guide rail 9. The front end of the holding lever 57 is in contact with the gap distribution adjusting bolt 59.

  Under normal conditions, the emergency stop controller 20 excites the electromagnetic magnet 54 and keeps the movable iron core 53 attracted to the fixed iron core 52. For this reason, the push pin 55 is held so as not to move in the axial direction, and the swinging of the holding lever 57 in the clockwise direction in FIG. 5 is restricted.

  The housing 42 is biased by the elastic elements 49 a and 49 b toward the side where the movable rail 41 comes into contact with the car guide rail 9, but the gap distribution adjusting bolt 59 attached to the housing 42 is attached to the holding lever 57. Due to the contact, the displacement of the housing 42 in the direction in which the movable rail 41 comes into contact with the car guide rail 9 is restricted.

  Here, the holding force of the electromagnetic magnet 54 is set so that the force that prevents the holding lever 57 from swinging by the push pin 55 overcomes the urging force of the elastic elements 49 a and 49 b against the housing 42.

  When an abnormality detection signal is received from the safety monitoring unit 22, the emergency stop control device 20 cuts off the energization of the coil 51 of the electromagnetic magnet 54, and the holding force of the electromagnetic magnet 54 is lost. Thereby, the restriction on the displacement of the movable iron core 53 and the push pin 55 is released, and the housing 42 is displaced rightward in FIG. 4 by the pressing force of the elastic elements 49a and 49b, and the holding lever 57 is moved to the timepiece of FIG. Is swung in the direction.

  When the rail contact portion 41c of the movable rail 41 comes into contact with the car guide rail 9 due to the displacement of the housing 42, the movable rail 41 is rotated in the direction corresponding to the traveling direction (up or down) of the car 1. . For example, when the car 1 is descending, the movable rail per 41 is rotated counterclockwise in FIG.

  When the movable rail contact 41 is rotated counterclockwise, the center Pdn of the lower cylindrical surface 41b approaches the car guide rail 9 side, so that the movable rail 41 itself contacts the car guide rail 9 together with the housing 42 as shown in FIG. It is displaced to the left side. When the rotation of the movable rail 41 further proceeds, the fixed rail 45 starts to contact the car guide rail 9 and the pressing element 46 is compressed.

  Thereafter, when the movable rail 41 further rotates, the lower brake shoe 44b comes into contact with the car guide rail 9 and comes into contact with the surface. At this time, the car guide rail 9 is gripped between the lower brake shoe 44 b and the fixed rail contact 45 by a predetermined pressing force of the pressing element 46. For this reason, the car 1 is decelerated and stopped with a desired braking force.

  When the car 1 is raised, the rotation direction of the movable rail per 41 after contacting the car guide rail 9 is the clockwise direction in FIG. 4, and the subsequent operation is almost the same as when the car is lowered.

  According to the emergency stop device 8 as described above, the braking operation can be started earlier by an electrical signal and the operation time can be increased as compared with the emergency stop device that holds and governs the governor rope of the governor. Compared with the machine brake 7, it can be improved to an extent comparable to that of the machine brake 7. Moreover, even if the traveling direction of the car 1 is either up or down, braking can be performed with one mechanism.

  FIG. 6 is a flowchart showing the braking device selection operation of the safety monitoring unit 22 of FIG. The safety monitoring unit 22 constantly monitors the speed based on the signal from the governor speed detector 25, and continues the monitoring when the car speed is zero (step S1). When the car speed is not zero, that is, when the car 1 is moving, the state of the landing door switch 23 is confirmed (step S2).

  If even one landing door is open, the state of the car door switch 24 is confirmed (step S3). If the car door is also open, an abnormality detection signal is output to the emergency stop control device 20. That is, when at least one landing door and car door are open, the emergency stop device 8 is selected, and the emergency stop device 8 is operated ignoring the deceleration regardless of the car speed.

  If the car door is closed, an abnormality detection signal is output to the main brake control device 17. That is, if at least one landing door is open but the car door is closed, it is expected that there will be passengers in the car 1, so that it is important to consider the deceleration regardless of the speed of the car 1. Select the upper brake 7

  The safety monitoring unit 22 also checks the state of the car door switch 24 even when the landing door is closed (step S4). When both the landing door and the car door are closed, the safety monitoring unit 22 determines that the elevator apparatus is normal, and continues monitoring without outputting an abnormality detection signal.

  If the landing door is closed but the car door is open, it is checked whether the car speed is greater than a predetermined speed. If the car speed is equal to or lower than the predetermined speed, an abnormality detection signal is output to the emergency stop control device 20. That is, in this case, the emergency stop device 8 is selected on the assumption that there is little influence on the human body because the car 1 is instantaneously stopped even if a large deceleration occurs.

  When the car speed is higher than the predetermined speed, an abnormality detection signal is output to the main brake control device 17. That is, in this case, the hoisting machine brake 7 is selected with an emphasis on deceleration.

  FIG. 7 is an explanatory diagram showing the relationship (selection table) between the states of the various sensors in FIG. 1 and the braking device selected by the safety monitoring unit 22. In addition, the state in which at least one landing door is open is indicated as “open”. In addition, with respect to each of the car door and the landing door, the open state includes not only the fully open state but also a state where the door is open even a little. This is because the car door switch and the landing door switch actually detect the all-doors closed state.

  In such an elevator device, a braking device suitable for the type of abnormal situation is automatically selected, so that the car can be stopped with an appropriate braking force according to the type of abnormal situation, reducing the deceleration. And shortening the stop distance can be suitably realized with a good balance.

Embodiment 2. FIG.
Next, FIG. 8 is a block diagram showing an elevator apparatus according to Embodiment 2 of the present invention. In the figure, the car 1 is provided with a loading state detection device 38 as a sensor for detecting the loading state in the car 1. As the loading state detection device 38, for example, a weighing device installed on the car floor, a weighing device provided on the rope stop of the main rope 3, or a photographing device (ITV camera or the like) installed in the cage is used. Can do.

  A signal from the loading state detection device 38 is input to the safety monitoring unit 22. The safety monitoring unit 22 determines whether the car 1 is manned or unmanned based on a signal from the loading state detection device 38.

  In the second embodiment, when the safety monitoring unit 22 detects the occurrence of an abnormal situation from the signals from the landing door switch 23, the car door switch 24 and the loading state detection device 38, the power conversion device 16 supplies power to the motor 6. The supply is shut off, the motor 6 is stopped, and an abnormality detection signal is output to the main brake control device 17 or the emergency stop control device 20. Other configurations are the same as those in the first embodiment. The signal from the governor speed detector 25 can be directly input to the emergency stop control device 20.

  FIG. 9 is a flowchart showing a braking device selection operation of the safety monitoring unit 22 of FIG. When the car 1 is moving and at least one landing door and the car door are open, the safety monitoring unit 22 outputs an abnormality detection signal to the emergency stop control device 20 and causes the emergency stop device 8 to perform a braking operation.

  Further, when the car 1 is moving and at least one landing door is open, but the car door is closed, it is determined whether the car 1 is manned based on a signal from the loading state detection device 38. Judgment is made (step S6). If the inside of the car 1 is unmanned, an abnormality detection signal is output to the emergency stop control device 20 giving priority to the stop distance, and the emergency stop device 8 is braked. Also, if the car 1 is manned, an abnormality detection signal is output to the main brake controller 17 with an emphasis on deceleration, and the hoisting machine brake 7 is braked.

  Further, although the car 1 is moving and all landing doors are closed, it is determined whether the car 1 is manned even when the car doors are open (step S6). If the car 1 is unmanned, the emergency stop device 8 is selected. If the car 1 is manned, the hoisting machine brake 7 is selected.

  FIG. 10 is an explanatory diagram showing the relationship (selection table) between the states of the various sensors in FIG. 8 and the braking device selected by the safety monitoring unit 22.

  In such an elevator device, a braking device suitable for the type of abnormal situation is automatically selected, so that the car can be stopped with an appropriate braking force according to the type of abnormal situation, reducing the deceleration. And shortening the stop distance can be suitably realized with a good balance.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described. In the third embodiment, when the occurrence of an abnormal situation is detected from the signals of the landing door switch 23 and the car door switch 24, the safety monitoring unit 22 cuts off the power supply to the motor 6 by the power converter 16 and the motor 6 And an abnormality detection signal is output to the main brake control device 17 or the emergency stop control device 20. Other configurations are the same as those in the first embodiment.

  FIG. 11 is a flowchart showing a braking device selection operation of the safety monitoring unit 22 according to the third embodiment. When the car 1 is moving, the safety monitoring unit 22 checks the state of the landing door switch 23 and the state of the car door switch 24 (steps S7 and S8). When at least one landing door and car door are open, an abnormality detection signal is output to the emergency stop control device 20 and the main brake control device 17, and the emergency stop device 8 and the hoisting machine brake 7 are connected. At the same time, the braking operation is performed.

  If all landing doors and car doors are closed, the safety monitoring unit 22 determines that the elevator apparatus is normal, and continues monitoring without outputting an abnormality detection signal. If either the landing door or the car door is open, it is checked whether the car door is open (step S9).

  When the car door is open, an abnormality detection signal is output to the emergency stop control device 20, and the emergency stop device 8 is braked. Further, when the car door is closed, that is, when the landing door is open, an abnormality detection signal is output to the main brake control device 17, and the hoisting machine brake 7 is braked.

  FIG. 12 is an explanatory diagram showing the relationship (selection table) between the states of various sensors and the braking device selected by the safety monitoring unit 22 in the third embodiment.

  In such an elevator device, a braking device suitable for the type of abnormal situation is automatically selected, so that the car can be stopped with an appropriate braking force according to the type of abnormal situation, reducing the deceleration. And shortening the stop distance can be suitably realized with a good balance. In addition, since the flow is simple compared to the first and second embodiments, it is suitable for configuring the safety monitoring unit 22 with a circuit that processes analog signals.

Embodiment 4 FIG.
Next, FIG. 13 is a flowchart showing a braking device selection operation of the safety monitoring unit 22 according to the fourth embodiment of the present invention. When the car 1 is moving, the safety monitoring unit 22 checks the state of the car door switch 24 (step S10). When the car door is open, an abnormality detection signal is output to the emergency stop control device 20, and the emergency stop device 8 is braked.

  If the car door is closed, it is checked whether the landing door is open (step S11). When at least one landing door is open, an abnormality detection signal is output to the main brake control device 17 to cause the hoisting machine brake 7 to perform a braking operation. On the other hand, if all landing doors and car doors are closed, the safety monitoring unit 22 determines that the elevator apparatus is normal, and continues monitoring without outputting an abnormality detection signal.

  FIG. 14 is an explanatory diagram showing the relationship (selection table) between the states of various sensors and the braking device selected by the safety monitoring unit 22 in the fourth embodiment.

  In such an elevator device, a braking device suitable for the type of abnormal situation is automatically selected, so that the car can be stopped with an appropriate braking force according to the type of abnormal situation, reducing the deceleration. And shortening the stop distance can be suitably realized with a good balance. In addition, since the flow is simple compared to the first and second embodiments, it is suitable for configuring the safety monitoring unit 22 with a circuit that processes analog signals. Furthermore, since the event that the emergency stop device 8 and the hoisting machine brake 7 are applied at the same time is eliminated as compared with the third embodiment, a reduction in deceleration can be realized.

Embodiment 5 FIG.
Next, FIG. 15 is a block diagram showing an elevator apparatus according to Embodiment 5 of the present invention. In the figure, a termination operation switch 39 as a sensor is installed in the vicinity of the vertical termination position of the hoistway. The terminal operation switch 39 is separated from the upper and lower limit positions of the safe stop possible range in the hoistway by the longest stop distance in the vertical direction when the emergency stop device 8 is operated with the main rope 3 connected to the car 1. It is installed at the position. Further, the termination operation switch 39 outputs an ON signal when the car 1 is positioned closer to the termination side of the hoistway than the termination operation switch 39.

  In the fifth embodiment, when the safety monitoring unit 22 detects the occurrence of an abnormal situation while the termination operation switch 39 is ON, the safety monitoring unit 22 cuts off the power supply to the motor 6 by the power conversion device 16 and stops the motor 6. And outputs an abnormality detection signal to the emergency stop control device 20. Other configurations are the same as those in the first embodiment. In FIG. 15, illustration of the landing door switch 23 and signal lines therefrom are omitted.

  FIG. 16 is a flowchart showing a braking device selection operation of the safety monitoring unit 22 of FIG. In the selection operation of the fifth embodiment, when it is determined in the first embodiment that an abnormality detection signal is output to the main brake control device 17, it is confirmed whether or not the termination operation switch 39 is ON (steps S12 and S13). ). If the terminal operation switch 39 is ON, an abnormality detection signal is output to the emergency stop control device 20, and the emergency stop device 8 is braked. If the termination operation switch 39 is OFF, an abnormality detection signal is output to the main brake control device 17 to cause the hoisting machine brake 7 to perform a braking operation.

  In such an elevator device, a braking device suitable for the type of abnormal situation is automatically selected, so that the car can be stopped with an appropriate braking force according to the type of abnormal situation, reducing the deceleration. And shortening the stop distance can be suitably realized with a good balance. In addition, in the vicinity of the terminal floor, a sudden stop with an emphasis on the stop distance is possible.

In the first to fifth embodiments, the function of the safety monitoring unit 22 is realized by a computer, but may be realized by an analog circuit.
In the first to fifth embodiments, the deceleration reduction brake control device 19 is not necessarily used.
Further, the sensors are not limited to the landing door switch 23, the car door switch 24, the governor speed detector, the loading state detection device 38, and the termination operation switch 39.
Furthermore, the braking device is not limited to the hoisting machine brake 7 and the emergency stop device 8, but may be a rope brake for gripping the main rope, a car brake mounted on the cage separately from the emergency stop device, or the like. Good.
Further, there may be three or more types of braking devices that can be selected.

Claims (3)

A car that is raised and lowered in the hoistway,
A hoisting machine having a hoisting machine brake capable of controlling a braking force, and moving the car up and down;
An emergency stop device mounted on the car and holding the car guide rail to brake the car,
Multiple landing door switches that detect opening and closing of landing doors,
A car door switch that detects the opening and closing of the car door,
A speed detector for detecting the speed of the car, and
Based on signals from the landing door switch, the car door switch, and the speed detector, an abnormal situation related to driving is detected, and the hoisting machine brake and the emergency stop device are selectively selected according to the type of the abnormal situation. with a safety monitoring section for braking operation,
The emergency stop device includes an electromagnetic magnet and a movable rail that comes into contact with the car guide rail when power to the electromagnetic magnet is interrupted, and the traveling direction of the car is either up or down. Even if there is, it is possible to brake the car with one mechanism,
The safety monitoring unit
When the car is moving and the car door is open, the emergency stop device is braked,
An elevator apparatus for braking the hoisting machine brake when the car is moving, the car door is closed, and at least one landing door is open . A car that is raised and lowered in the hoistway,
A hoisting machine having a hoisting machine brake capable of controlling a braking force, and moving the car up and down;
An emergency stop device mounted on the car and holding the car guide rail to brake the car,
Multiple landing door switches that detect opening and closing of landing doors,
A car door switch that detects the opening and closing of the car door,
A speed detector for detecting the speed of the car, and
Based on signals from the landing door switch, the car door switch, and the speed detector, an abnormal situation related to driving is detected, and the hoisting machine brake and the emergency stop device are selectively selected according to the type of the abnormal situation. with a safety monitoring section for braking operation,
The emergency stop device includes an electromagnetic magnet and a movable rail that comes into contact with the car guide rail when power to the electromagnetic magnet is interrupted, and the traveling direction of the car is either up or down. Even if there is, it is possible to brake the car with one mechanism,
The safety monitoring unit
When the car is moving, at least one of the landing doors is open, and the car door is open, the emergency stop device is braked,
When the car is moving, at least one of the landing doors is open and the car door is closed, the hoisting machine brake is braked,
When the car is moving, all the landing doors are closed, and the car doors are open, if the car speed is below a predetermined speed, the emergency stop device is braked and the car speed is set to the predetermined speed. An elevator device for braking the hoisting machine brake if larger . A car that is raised and lowered in the hoistway,
A hoisting machine having a hoisting machine brake capable of controlling a braking force, and moving the car up and down;
An emergency stop device mounted on the car and holding the car guide rail to brake the car,
Multiple landing door switches that detect opening and closing of landing doors,
A car door switch that detects the opening and closing of the car door,
A speed detector for detecting the speed of the car,
Termination operation switch installed near the termination position of the hoistway, and
Based on signals from the landing door switch, the car door switch, the speed detector, and the terminal operation switch, an abnormal situation related to driving is detected, and the hoisting machine brake and the emergency stop are set according to the type of the abnormal situation. Equipped with a safety monitoring unit that selectively brakes the device ,
The emergency stop device includes an electromagnetic magnet and a movable rail that comes into contact with the car guide rail when power to the electromagnetic magnet is interrupted, and the traveling direction of the car is either up or down. Even if there is, it is possible to brake the car with one mechanism,
The safety monitoring unit
When the car is moving, at least one of the landing doors is open, and the car door is open, the emergency stop device is braked,
When the car is moving, at least one of the landing doors is open, and the car door is closed, the car is positioned closer to the end of the hoistway than the end operation switch. If the emergency stop device is braked, and the car is not located on the end side of the hoistway from the end operation switch, the hoisting machine brake is braked,
When the car is moving, all the landing doors are closed, the car doors are open, and the car speed is below a predetermined speed, the emergency stop device is braked,
When the car is moving, all the landing doors are closed, the car doors are open, and the car speed is greater than a predetermined speed, the car is at the end of the hoistway rather than the end action switch. An elevator device that causes the emergency stop device to perform a braking operation if it is positioned on the side, and performs a braking operation to the hoisting machine brake if the car is not positioned on the end side of the hoistway with respect to the end operation switch .

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