JP2013133183A - Elevator emergency stop device and elevator emergency stop method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator emergency stop device capable of reducing an impact on a passenger in a car during the emergency stop of the car.SOLUTION: The elevator emergency stop device includes: a governor sheave 81 performing the emergency stop when rotating speed exceeds a first predetermined value; a governor rope 7 wound around the governor sheave 81 and moving in cooperation with lifting/lowering of the car 2; an emergency stop device 11 performing the emergency stop of the car 2 by the emergency stop of the governor rope 7; a governor encoder 82 detecting the rotating speed of the governor sheave 81; a governor rope brake 9 performing the emergency stop of the governor rope 7; and a governor rope brake control device 10 controlling the governor rope brake 9. The governor rope brake control device 10 determines whether or not a main rope 4 is broken on the basis of the operating information of a hoisting machine 6 and the rotating speed information of the governor sheave 81, and performs the emergency stop of the governor rope 7 by the governor rope brake 9 when it is determined that the main rope 4 is broken.

Description

  The present invention relates to an elevator emergency stop device and an elevator emergency stop method in which an emergency stop device makes an emergency stop of a car by an emergency stop of a governor rope.

  Conventionally, a speed governor sheave that stops emergency when the rotational speed exceeds a predetermined value, and a speed governor sheave that is wrapped around the speed governor sheave and moves in conjunction with the raising and lowering of the car. Elevator emergency stop device provided with a speed governor rope that makes an emergency stop by an emergency stop device and an emergency stop device that is provided in the car and that makes the emergency stop of the car when the speed governor rope makes an emergency stop, and is connected to the car A slip detection device for detecting slip of the main rope with respect to the hoisting sheave by comparing the moving speed of the main rope and the rotational speed of the hoisting sheave around which the main rope is wound, and a slip detection device There is known an elevator emergency stop device including a governor rope brake for emergency stop of a governor rope when a slip of a main rope with respect to a hoisting sheave is detected. When the main rope slips with respect to the hoisting sheave, the governor rope is brought to an emergency stop by the governor rope brake, and the emergency stop device makes the car stop. Thus, when the main rope slips with respect to the hoisting sheave, the car can make an emergency stop before the rotational speed of the governor sheave exceeds the predetermined value. As a result, it is possible to reduce the impact given to passengers in the car when the main rope slips with respect to the hoisting sheave and the car makes an emergency stop (see, for example, Patent Document 1).

JP 2004-149231 A

  However, when the main rope breaks, the governor rope brake does not operate because the main rope does not slip with respect to the hoisting sheave. Therefore, the car does not make an emergency stop until the rotational speed of the governor sheave exceeds a predetermined value. That is, when the main rope breaks, the car cannot be emergency stopped before the rotational speed of the governor sheave exceeds a predetermined value. As a result, when the main rope breaks, there is a problem that the impact given to the passengers in the car when the car is brought to an emergency stop increases.

  The present invention provides an elevator emergency stop device and an elevator emergency stop method capable of reducing the impact given to passengers in a car when the car makes an emergency stop.

  The elevator emergency stop device according to the present invention is rotatably provided, and is wound around a governor sheave that stops emergency when the rotational speed exceeds a first predetermined value, and the governor sheave, A speed governor rope that moves in conjunction with the raising and lowering of the car and emergency stop by the emergency stop of the speed governor sheave, and the speed governor rope that is provided in the car and makes an emergency stop. An elevator emergency stop device having an emergency stop device for emergency stop, a governor encoder for detecting a rotational speed of the governor sheave, and a governor rope brake for emergency stop of the governor rope And a governor rope brake control device that controls the governor rope brake, and the governor rope brake control device includes operation information of a hoist that raises and lowers the car via a main rope, and The governor The main rope is broken based on the rotational speed information of the governor sheave detected by the encoder, and the governor rope brake is used to determine whether the main rope is broken. Emergency stop the speed rope.

  The elevator emergency stop method according to the present invention is configured such that when the rotational speed of the speed governor sheave around which the speed governor rope that moves in conjunction with the raising and lowering of the car exceeds a first predetermined value, An elevator emergency stop method in which the speed governor rope is brought to an emergency stop due to an emergency stop of the speed gear sheave and an emergency stop device emergency stops the car, and the rotational speed of the speed governor sheave is controlled. Detecting speed governor rotation speed detecting step, operation information of hoisting machine that raises and lowers the car via the main rope, and rotation speed information of the speed governor sheave detected in the speed governor rotation speed detecting step The main rope breakage determining step for determining whether or not the main rope is broken, and the governor rope brake is adjusted when the main rope breakage determining step determines that the main rope is broken. Speed control for emergency stop of the speed rope Rope emergency stop step, by the governor rope by the speed governor rope emergency stop process is emergency stop, the the emergency stop device and a squirrel-stop process to emergency stop the car.

  According to the elevator emergency stop device according to the present invention, a speed governor sheave that is rotatably provided and that makes an emergency stop when the rotational speed exceeds the first predetermined value, and the speed governor sheave wound around the speed governor sheave. A speed governor rope that moves in conjunction with the raising and lowering of the car and that comes to an emergency stop when the speed governor sheaves come to an emergency stop, and an emergency stop on the speed governor rope that stops the car Emergency stop device, governor encoder for detecting the rotational speed of the governor sheave, governor rope brake for emergency stop of the governor rope, and governor rope brake for controlling the governor rope brake The governor rope brake control device is based on the operation information of the hoisting machine that raises and lowers the car via the main rope and the rotational speed information of the governor sheave detected by the governor encoder. Determine whether the main rope is broken When it is determined that the main rope is broken, the governor rope is emergency stopped by the governor rope brake. Therefore, when the main rope is broken, the rotational speed of the governor sheave is a first predetermined value. The car can be brought to an emergency stop before exceeding. As a result, the impact given to the passengers in the car when the car makes an emergency stop can be reduced.

  According to the elevator emergency stop method according to the present invention, when the rotational speed of the speed governor sheave around which the speed governor rope moving in conjunction with the raising and lowering of the car exceeds the first predetermined value, An elevator emergency stop method in which an emergency stop device emergency stops the elevator when the governor sheave emergency stops due to the emergency stop of the governor sheave, and detects the rotational speed of the governor sheave. Based on the speed governor rotation speed detection step, the operation information of the hoist that raises and lowers the car via the main rope, and the rotation speed information of the speed governor sheave detected in the speed governor rotation speed detection step, The main rope rupture determination process for determining whether or not the main rope is broken, and the governor that causes the governor rope brake to stop the governor rope when the main rope breakage determination process determines that the main rope has broken Machine rope emergency stop process and governor rope non When the main rope breaks, the speed of the speed governor sheaves can be reduced when the main rope breaks. The car can be emergency stopped before the value exceeds the first predetermined value. As a result, the impact given to the passengers in the car when the car makes an emergency stop can be reduced.

1 is a configuration diagram illustrating an elevator apparatus according to Embodiment 1 of the present invention. It is a block diagram which shows the principal part of the elevator emergency stop apparatus which concerns on Embodiment 2 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding members and parts will be described with the same reference numerals.

Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, an elevator apparatus includes a car 2 that moves up and down the hoistway 1, a counterweight 3 that moves up and down the hoistway 1 in a direction opposite to the moving direction of the car 2, one end connected to the car 2, and the other end A main rope 4 having a portion connected to the counterweight 3, a hoisting machine 6 provided in the machine room 5 for moving the main rope 4, and a governor rope 7 moving in conjunction with the raising and lowering of the car 2. I have. In addition, the elevator apparatus emergency-controls the governor rope 7 when the speed of the car 2 exceeds the upper limit value, and when the main rope 4 breaks and the governor 8 that stops the governor rope 7 in an emergency stop. The speed governor rope brake 9 to be stopped, the speed governor rope brake control device 10 for controlling the speed governor rope brake 9, and the emergency stop device that makes the car 2 emergency stop by the emergency stop of the speed governor rope 7. 11.

  The hoisting machine 6 includes a hoisting machine sheave 61 around which the main rope 4 is wound, a hoisting machine encoder 62 that detects the rotational speed of the hoisting machine sheave 61, and the hoisting machine sheave 61 is stopped. A hoisting machine brake 63 for braking the hoisting machine sheave 61 is provided. The main rope 4 moves as the hoisting machine sheave 61 rotates. That is, the hoisting machine sheave 61 moves the car 2 up and down via the main rope 4. The hoisting machine sheave 61 and the hoisting machine brake 63 are controlled by an elevator control panel (not shown).

  The speed governor 8 includes a speed governor sheave 81 that is rotatably provided in the machine room 5 and on which the speed governor rope 7 is wound, and a speed governor encoder 82 that detects the rotational speed of the speed governor sheave 81. And a tension wheel 83 provided on the hoistway 1 and around which the governor rope 7 is wound. The governor sheave 81 is connected to the car 2 via the governor rope 7 and the emergency stop device 11. Therefore, the governor sheave 81 rotates in conjunction with the raising and lowering of the car 2. The governor sheave 81 is configured to make an emergency stop when the rotational speed of the governor sheave 81 exceeds a first predetermined value. The first predetermined value is the rotational speed of the governor sheave 81 when the car 2 moves up and down at the upper speed limit. In this example, the upper limit value of the speed of the car 2 is 1.4 times the rated speed. As a result, when the speed of the car 2 exceeds 1.4 times the rated speed, the governor sheave 81 is brought to an emergency stop. The upper limit value of the speed of the car 2 is not limited to 1.4 times the rated speed, and may be other values.

  The governor rope brake 9 is provided in the machine room 5. The governor rope brake 9 is displaced between a gripping position for gripping the governor rope 7 and a separated position away from the governor rope 7. The governor rope brake 9 causes the governor rope 7 to stop emergency by gripping the governor rope 7.

  The speed governor rope brake control device 10 receives rotation speed information (operation information) of the hoisting sheave 61 detected by the hoisting machine encoder 62 from the hoisting machine encoder 62. Further, the governor rope brake control device 10 is configured such that when the hoisting machine brake 63 brakes the hoisting machine sheave 61, the hoisting machine brake 63 is connected to the hoisting machine sheave. Operation information (operation information) indicating that 61 is braked is input. Further, the speed governor rope brake control device 10 receives from the speed governor encoder 82 the rotational speed information of the speed governor sheave 81 detected by the speed governor encoder 82.

  The speed governor rope brake control device 10 includes rotational speed information of the hoisting sheave 61 input from the hoisting machine encoder 62 and rotational speed information of the speed governor sheave 81 input from the speed governor encoder 82. Based on the above, whether or not the main rope 4 is broken is determined. Specifically, the governor rope brake control device 10 determines that the difference between the rotational speed of the hoisting sheave 61 and the rotational speed of the governor sheave 81 exceeds a second predetermined value. It is determined that the rope 4 is broken. The governor rope brake control device 10 displaces the governor rope brake 9 to the gripping position when determining that the main rope 4 is broken. As a result, the governor rope 7 comes to an emergency stop. As the second predetermined value, when the main rope 4 breaks, the speed governor rope brake 9 makes the speed governor rope 7 emergency before the rotational speed of the speed governor sheave 81 exceeds the first predetermined value. A value that can be stopped is set. Therefore, the speed governor rope 7 makes an emergency stop before the rotational speed of the speed governor sheave 81 exceeds the first predetermined value when the main rope 4 is broken.

  Further, the governor rope brake control device 10 determines the main rope based on the operation information input from the hoisting machine brake 63 and the rotational speed of the governor sheave 81 input from the governor encoder 82. 4 is determined whether or not there is a break. Specifically, the speed governor rope brake control device 10 is a case where operation information is input from the hoisting machine brake 63, and the rotational speed of the speed governor sheave 81 input from the speed governor encoder 82. Is determined to have exceeded the third predetermined value, it is determined that the main rope 4 has broken. Also in this case, the governor rope brake control device 10 displaces the governor rope brake 9 to the gripping position. As a result, the governor rope 7 comes to an emergency stop. As the third predetermined value, when the main rope 4 is broken and the car 2 starts to descend, the governor rope brake 9 is used before the rotational speed of the governor sheave 81 exceeds the first predetermined value. Is set to a value capable of emergency stop of the governor rope 7. Therefore, the speed governor rope 7 is in an emergency stop before the rotational speed of the speed governor sheave 81 exceeds the first predetermined value when the main rope 4 is broken while the hoisting sheave 61 is stopped. To do. Further, as this third predetermined value, there is a door opening protection device (not shown) that prevents the car 2 from traveling in the door open state when the main rope 4 is broken and the car 2 starts to descend. The value at which the governor rope brake 9 causes the governor rope 7 to stop emergency before the car 2 reaches the operating speed is set. Therefore, even when the car 2 cannot be stopped by the door-opening travel protection device due to the main rope 4 breaking, the car 2 is placed within the range in which the car 2 is stopped by the door-opening travel protection device. Emergency stop can be made.

  The emergency stop device 11 is connected to the governor rope 7. The emergency stop device 11 is displaced between an engagement position where it engages with a guide rail (not shown) for guiding the car 2 and a release position where the engagement with the guide rail is released. The emergency stop device 11 makes an emergency stop of the car 2 when the position of the emergency stop device 11 is in the engaged position. The emergency stop device 11 is displaced from the release position to the engagement position when the speed governor rope 7 comes to an emergency stop, and makes the car 2 stop the emergency.

  An elevator emergency stop device is constituted by the governor rope 7, the governor 8, the governor rope brake 9, the governor rope brake control device 10, and the emergency stop device 11.

  Next, the operation of the elevator apparatus will be described. First, the hoisting machine encoder 62 starts the detection of the rotational speed of the hoisting machine sheave 61 (the hoisting machine rotational speed detection step), and the speed governor encoder 82 detects the rotational speed of the speed governor sheave 81. The detection (governor rotational speed detection step) is started. Thereby, the rotational speed information of the hoisting machine sheave 61 and the rotational speed information of the governor sheave 81 are always input to the governor rope brake control device 10.

  Thereafter, when the main rope 4 is broken while the car 2 is being raised, the car 2 is decelerated and further lowered even though the hoisting machine sheave 61 is rotating in the direction of raising the car 2. As a result, the governor rope 7 moves in conjunction with the car 2.

  Thereafter, the governor rope brake control device 10 determines whether or not the main rope 4 is broken based on the rotational speed information of the hoisting sheave 61 and the rotational speed information of the governor sheave 81 (main Rope breakage determination process). When determining that the main rope 4 is broken, the governor rope brake control device 10 displaces the governor rope brake 9 to the gripping position. As a result, the governor rope brake 9 makes the governor rope 7 emergency stop (the governor rope emergency stop process).

  Thereafter, when the governor rope 7 is brought to an emergency stop, the emergency stop device 11 makes the car 2 emergency stop (car emergency stop process).

  Further, when the main rope 4 is broken while the car 2 is stopped, the car 2 starts to descend irrespective of the braking force applied to the hoisting sheave 61 by the hoisting machine brake 63. Thereby, the governor rope 7 starts moving in conjunction with the lowering of the car 2. In this case, since the hoisting machine brake 63 is braking the hoisting machine sheave 61, operation information is input to the governor rope brake control device 10 (operation information input process).

  Thereafter, the governor rope brake control device 10 determines whether or not the main rope 4 is broken based on the operation information of the hoisting machine brake 63 and the rotation speed information of the governor sheave 81 (main rope breakage). Judgment process). When determining that the main rope 4 is broken, the governor rope brake control device 10 displaces the governor rope brake 9 to the gripping position. As a result, the governor rope brake 9 makes the governor rope 7 emergency stop (the governor rope emergency stop process).

  Thereafter, when the governor rope 7 is brought to an emergency stop, the emergency stop device 11 makes the car 2 emergency stop (car emergency stop process).

  As described above, according to the elevator emergency stop device according to Embodiment 1 of the present invention, the governor sheave that is rotatably provided and that makes an emergency stop when the rotation speed exceeds the first predetermined value. 81 and the governor rope 7 that is wound around the governor sheave 81 and moves in conjunction with the raising and lowering of the car 2, and the emergency stop of the governor sheave 81 makes an emergency stop. The emergency stop device 11 for emergency stop of the car 2 by the emergency stop of the governor rope 7, the governor encoder 82 for detecting the rotational speed of the governor sheave 81, and the governor rope 7 A speed governor rope brake 9 for emergency stop and a speed governor rope brake control device 10 for controlling the speed governor rope brake 9 are provided. The speed governor rope brake control device 10 is connected to the car 2 via the main rope 4. Information on the hoisting machine 6 that raises and lowers Based on the rotational speed information of the governor sheave 81 detected by the speed governor 82, it is determined whether or not the main rope 4 is broken, and when it is determined that the main rope 4 is broken, the governor rope brake 9 Therefore, when the main rope 4 is broken, the car 2 can be emergency stopped before the rotational speed of the governor sheave 81 exceeds the first predetermined value. As a result, it is possible to reduce the impact given to the passengers in the car 2 when the car 2 makes an emergency stop, and to reduce discomfort to the passengers in the car 2.

  Further, according to the elevator emergency stop device, the hoisting machine 6 includes a hoisting machine sheave 61 around which the main rope 4 is wound, and a hoisting machine encoder 62 that detects the rotational speed of the hoisting machine sheave 61. The speed governor rope brake control device 10 uses the rotational speed information of the hoisting sheave 61 detected by the hoisting machine encoder 62 as the operation information of the hoisting machine 6, and uses the speed governor class. When the main rope 4 is broken when the difference between the rotation speed of the car 81 and the rotation speed of the hoisting sheave 61 exceeds the second predetermined value, the main rope 4 is broken. In addition, the car 2 can be brought to an emergency stop before the rotational speed of the governor sheave 81 exceeds the first predetermined value.

  Further, according to the elevator emergency stop device, the hoisting machine 6 includes the hoisting machine sheave 61 around which the main rope 4 is wound, and the hoisting machine brake 63 that brakes the hoisting machine sheave 61. The governor rope brake control device 10 uses the operation information of the hoisting machine brake 63 as the operation information of the hoisting machine 6, and the hoisting machine brake 63 brakes the hoisting machine sheave 61. In this case, when the rotational speed of the governor sheave 81 exceeds the third predetermined value, it is determined that the main rope 4 is broken, so that the main rope 4 is broken while the car 2 is stopped. In this case, the car 2 can be brought to an emergency stop before the rotational speed of the governor sheave 81 exceeds the first predetermined value.

  Further, according to the elevator emergency stop method according to Embodiment 1 of the present invention, the rotational speed of the governor sheave 81 around which the governor rope 7 that moves in conjunction with the raising and lowering of the car 2 is wound is the first. In the elevator emergency stop method, when the governor sheave 81 is emergency stopped when the predetermined value of 1 is exceeded, the governor rope 7 is emergency stopped, and the emergency stop device 11 makes the car 2 emergency stop. The speed governor rotational speed detecting step for detecting the rotational speed of the speed governor sheave 81 and the operation information and the speed governor rotational speed detecting step for the hoisting machine 6 that moves the car 2 up and down via the main rope 4. On the basis of the rotational speed information of the governor sheave 81 detected in step 1, it is determined that the main rope 4 has broken in the main rope break determination step and the main rope break determination step. When the governor rope brake 9 is A speed governor rope emergency stop process for emergency stop 7 and a car emergency stop process for the emergency stop device 11 to emergency stop the car 2 by emergency stop of the speed governor rope 7 in the speed governor rope emergency stop process. Thus, when the main rope 4 is broken, the car 2 can be emergency-stopped before the rotational speed of the governor sheave 81 exceeds the first predetermined value. As a result, it is possible to reduce the impact given to the passengers in the car 2 when the car 2 makes an emergency stop, and to reduce discomfort to the passengers in the car 2.

Embodiment 2. FIG.
FIG. 2 is a block diagram showing a main part of an elevator emergency stop device according to Embodiment 2 of the present invention. In the figure, the elevator apparatus further includes a current detection device 12 that detects a load current supplied to a hoisting motor (not shown) that rotates the hoisting sheave 61 when the car 2 moves up and down. . Load current information detected by the current detection device 12 is input to the governor rope brake control device 10.

  In this example, the elevator emergency stop device is composed of the governor rope 7, the governor 8, the governor rope brake 9, the governor rope brake control device 10, the emergency stop device 11, and the current detection device 12. .

  The hoisting sheave 61 (FIG. 1) moves the car 2 up and down under the control of an elevator control panel (not shown) when the governor rope brake 9 stops the governor rope 7 in an emergency stop. A trial run is planned. The trial operation in this case is an operation for raising and lowering the car 2 by about several centimeters, and is an operation for determining whether or not the governor rope 7 is broken after the car 2 is emergency stopped. When the speed governor rope 7 is in an emergency stop, the car 2 cannot be raised and lowered as in normal operation, but can be raised and lowered by about several centimeters.

  The governor rope brake control device 10 is used when the hoisting sheave 61 (FIG. 1) is slightly rotated by a trial operation when the governor rope 7 is in an emergency stop by the governor rope brake 9. It is determined whether or not the load current detected by the current detection device 12 exceeds a fourth predetermined value. The governor rope brake control device 10 is a load current when the governor rope 7 is emergency stopped by the governor rope brake 9 and the hoisting sheave 61 is slightly rotated by the trial operation. , The emergency stop of the governor rope 7 by the governor rope brake 9 is released. As the fourth predetermined value, the value of the load current necessary for raising and lowering the car 2 and the counterweight 3 is set. Other configurations are the same as those in the first embodiment.

  Next, the operation of the elevator apparatus when the emergency stop of the car 2 is released will be described. As described in the first embodiment, after the speed governor rope 7 is emergency stopped and the emergency stop device 11 makes the car 2 emergency stop, the elevator control panel starts a trial run, and the current detection device 12 is The load current supplied to the hoisting machine sheave 61 is detected (load current detection step).

  Thereafter, the governor rope brake control device 10 determines whether or not the load current exceeds a fourth predetermined value. When determining that the load current exceeds the fourth predetermined value, the governor rope brake control device 10 displaces the governor rope brake 9 to the separated position, assuming that the main rope 4 is not broken. Thereby, the emergency stop of the governor rope 7 is released, and the emergency stop of the car 2 is released (car emergency stop release process). Thereafter, the elevator control panel rotates the hoisting machine sheave 61 so that the car 2 is raised. Thereby, the safety device 11 is automatically displaced from the engagement position to the release position. Thus, the operation of the elevator apparatus when the emergency stop of the car 2 is released is completed.

  As described above, according to the elevator emergency stop device according to Embodiment 2 of the present invention, the load current supplied to the hoisting machine motor that rotates the hoisting machine sheave 61 when the car 2 moves up and down is obtained. The hoisting machine 6 is further equipped with a current detection device 12 for detecting the car 2 when the speed governor rope brake 9 stops the speed governor rope 7 in an emergency stop. The speed governor rope brake control device 10 is in the case where the speed governor rope 7 is in an emergency stop by the speed governor rope brake 9 and the load current during the trial operation exceeds the fourth predetermined value. Furthermore, since the emergency stop of the governor rope 7 by the governor rope brake 9 is released, the emergency stop of the car 2 can be automatically released when the car 2 is emergency stopped due to erroneous detection. As a result, the elevator apparatus can be automatically returned.

  In the second embodiment, the configuration in which the load current information detected by the current detection device 12 is input from the current detection device 12 to the governor rope brake control device 10 is described. The load current information may be input from the elevator control panel to the governor rope brake control device 10.

  Further, in each of the above embodiments, as the operation information of the hoisting machine 6, both the rotational speed information of the hoisting machine sheave 61 and the operation information of the hoisting machine brake 63 detected by the hoisting machine encoder 62 are used. However, only one of the configurations may be used.

  In each of the above embodiments, the governor rope brake control device 10 is based on the rotational speed information of the governor sheave 81 and the rotational speed information of the hoisting sheave 61 while the car 2 is moving up and down. Although the configuration for determining the breakage of the main rope 4 has been described, the speed governor rope brake control device 10 is not limited to this. The structure which determines the fracture | rupture of the main rope 4 based on the rotational speed information of the upper machine sheave 61 may be sufficient. In this case, the governor rope brake control device 10 may not determine whether the main rope 4 is broken based on the rotational speed information of the governor sheave 81 and the operation information of the hoisting machine brake 63.

  In each of the above-described embodiments, the configuration in which the operation information of the hoisting machine brake 63 is input from the hoisting machine brake 63 to the governor rope brake control device 10 has been described. The operation information of the hoisting machine brake 63 may be input to the governor rope brake control device 10 from the control panel.

  1 hoistway, 2 cages, 3 counterweights, 4 main ropes, 5 machine room, 6 hoisting machine, 7 governor rope, 8 governor, 9 governor rope brake, 10 governor rope brake control device 11 Emergency stop device, 12 Current detection device, 61 Hoisting machine sheave, 62 Hoisting machine encoder, 63 Hoisting machine brake, 81 Speed governor sheave, 82 Speed governor encoder, 83 Tensioner.

Claims (5)

A governor sheave that is rotatably provided and that makes an emergency stop when the rotational speed exceeds a first predetermined value;
A governor rope that is wound around the governor sheave, moves in conjunction with the raising and lowering of the car, and that makes an emergency stop due to an emergency stop of the governor sheave;
An elevator emergency stop device provided with an emergency stop device provided on the car and emergency stop of the car by the emergency stop of the governor rope,
A governor encoder for detecting a rotational speed of the governor sheave;
A governor rope brake for emergency stop of the governor rope;
A governor rope brake control device for controlling the governor rope brake;
The governor rope brake control device is based on the operation information of a hoisting machine that raises and lowers the car via a main rope and the rotational speed information of the governor sheave detected by the governor encoder. An elevator emergency stop device that determines whether or not a main rope has been broken and, when it is determined that the main rope has broken, causes the governor rope to emergency stop by the governor rope brake. The hoisting machine has a hoisting machine sheave around which the main rope is wound, and a hoisting machine encoder that detects a rotation speed of the hoisting machine sheave,
The speed governor rope brake control device uses the rotational speed information of the hoisting sheave as detected by the hoisting machine encoder as the operation information of the hoisting machine, and the rotational speed of the speed governor sheave 2. The elevator emergency stop device according to claim 1, wherein the main rope is determined to be broken when a difference between the rotation speed of the hoisting machine sheave exceeds a second predetermined value. The hoisting machine has a hoisting machine sheave around which the main rope is wound, and a hoisting machine brake that brakes the hoisting machine sheave,
The speed governor rope brake control device uses operation information of the hoisting machine brake as the operation information of the hoisting machine, and the hoisting machine brake is braking the hoisting machine sheave. The elevator emergency according to claim 1 or 2, wherein when the rotational speed of the governor sheave exceeds a third predetermined value, it is determined that the main rope is broken. Stop device. A current detection device for detecting a load current supplied to a hoisting machine motor that rotates the hoisting sheave when the car moves up and down;
The hoisting machine is configured to perform a trial run of raising and lowering the car when the governor rope brake makes the governor rope emergency stop.
The governor rope brake control device is a case where the governor rope is in an emergency stop due to the governor rope brake, and the load current at the time of the test operation exceeds a fourth predetermined value. The elevator emergency stop device according to any one of claims 1 to 3, wherein an emergency stop of the governor rope by the governor rope brake is released. When the speed governor sheave around which the speed governor rope that moves in conjunction with the raising and lowering of the car is wound exceeds the first predetermined value, the speed governor sheave is brought to an emergency stop. An elevator emergency stop method in which the governor rope is emergency stopped and an emergency stop device emergency stops the car,
A governor rotational speed detecting step for detecting the rotational speed of the governor sheave;
Based on the operation information of the hoist that raises and lowers the car via the main rope and the rotation speed information of the governor sheave detected in the speed governor rotation speed detection step, the breaking of the main rope A main rope breakage determination step for determining presence or absence;
A governor rope emergency stop step in which a governor rope brake makes an emergency stop of the governor rope when it is determined in the main rope break determination step that the main rope is broken;
An elevator emergency stop method comprising: a car emergency stop process in which the emergency stop device causes an emergency stop of the car by the emergency stop of the governor rope in the emergency stop process of the governor rope.

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