JP6027686B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus.

  In general, an elevator apparatus is provided with a governor that constantly monitors the ascending / descending speed of a car and makes an emergency stop of the car when the car falls into a predetermined overspeed state. Specifically, the speed governor, when the raising / lowering speed of the car exceeds the rated speed and reaches the first overspeed (usually about 1.3 times the rated speed), the power supply of the hoisting machine that drives the car and The power supply of the control device that controls the hoisting machine is shut off. Also, if the speed reducer of the car exceeds the first overspeed and reaches the second overspeed (usually about 1.4 times the rated speed) for some reason, the speed governor Operate and mechanically stop the car.

  By the way, in recent years, the speed and length of the elevator apparatus have been increased along with the increase in the number of buildings, and in such an elevator apparatus, a sudden change in atmospheric pressure occurs due to the raising and lowering of the car, and the passengers can hear it. Gives a steady sense of ear closure. Since the human ear is more adaptable to the side where the air pressure decreases, i.e. when the car rises, than the side where the air pressure rises, i.e. when the car descends, the rated speed in the down direction is lower than the rated speed in the up direction There is a need for an elevator device that is set low and reduces the feeling of ear closure.

  Patent Document 1 discloses a background art of such an elevator apparatus. Specifically, a speed control rope connected to the car, a sheave around which the speed control rope is wound, a first speed control mechanism that controls the rotational speed of the sheave, There is disclosed a speed governing device that is connected via a horizontal shaft and a clutch mechanism and includes a second speed governing mechanism that regulates the rotational speed of the sheave when the rotational force of the sheave is transmitted.

  Further, in Patent Document 1, the clutch mechanism transmits the rotational force of the sheave to the second speed control mechanism when the sheave rotates normally, that is, when the car descends, and cancels the transmission of the torque when the sheave reverses, that is, when the car rises. In this way, the first speed control mechanism detects the overspeed at the time of ascent, and the second speed control mechanism detects the overspeed at the time of lowering, and detects an overspeed having a different value depending on the moving direction of the car. I am doing so.

JP 2000-327241 A

  However, in the elevator apparatus described in Patent Document 1, no particular consideration is given to the operation control of the elevator when an abnormality occurs in the clutch mechanism. For example, the one-way clutch is used as the clutch mechanism. When the detection device detects an abnormality of the clutch, the actual situation is that the control is performed so that the emergency stop is performed during both the ascending operation and the descending operation of the car. When the car is stopped in an emergency as described above, the car carrying passengers often stops between the floors where the doors cannot be opened, and there is a problem that a so-called confinement occurs and places a heavy burden on the user. .

  The present invention has been made in consideration of the above points, and proposes an elevator apparatus capable of reducing confinement and improving usability while ensuring safety.

  In order to solve such a problem, the elevator apparatus according to the present invention controls the overall operation of the car so that the elevator is moved up and down in the hoistway and the raising and lowering speed is different between the raising and lowering of the car. A device, an encoder that detects a traveling direction of the car and outputs a detection signal indicating the traveling direction to the control device, a first speed governor that detects a traveling overspeed of the car, and a traveling overspeed of the car A second speed governor, and the clutch transmits the rotational operation of the sheave to the rotating body of the second speed governor during the descending operation of the car, and the second gear from the sheave during the ascending operation of the car. In the elevator apparatus that cancels the transmission of the rotational operation to the speed governor, the control device causes the clutch to operate during the ascending operation of the car based on the detection signal from the encoder and the detection signal detected by the second speed governor. Determine if it ’s abnormal, If the latch is judged as abnormal, and controls to switch the driving of the car in an emergency operation.

  According to the present invention, it is possible to improve the usability by reducing confinement while ensuring safety.

It is the whole elevator apparatus block diagram in this Embodiment. It is a front lineblock diagram of a governor. It is a flowchart which shows a 1st emergency operation process. It is a flowchart which shows a 2nd emergency operation process. It is a flowchart which shows a 3rd emergency operation process.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) 1st Embodiment FIG. 1: shows the whole elevator apparatus 1 structure in this Embodiment. In the elevator apparatus 1, a lifting body, that is, a car 30 and a counterweight 40 are connected to a hoistway 20 provided in the building 10 by a main rope 50 so that the car 30 can be lifted and lowered along the guide rail 60. Configured.

  In the machine room 70 formed in the upper part of the hoistway 20, a hoisting machine 80 around which the main rope 50 is wound, a control device 90 for controlling the hoisting machine 80, and a speed governor 100 are arranged. The The speed governor 100 includes an endless speed control rope 101 stretched over the entire lifting stroke in the hoistway 20, and a sheave 102 installed in the machine room 70 and wrapped around the speed control rope 101. Consists of The front configuration of the governor 100 viewed from the X1 direction will be described with reference to FIG.

  The car 30 is provided with an emergency stop device 201 that grips the guide rail 60 with a wedge in an emergency, and an operation lever 202 that drives the emergency stop device 201 and is pivotally supported on the side of the car 30.

  In addition, the elevator apparatus in this Embodiment is not limited to the structure shown in FIG. 1, For example, without providing the machine room 70 in the upper part of the hoistway 20, it is the top part of the hoistway 20, and is the guide rail 60. You may make it install the governor 100 in the top part.

  FIG. 2 shows a front configuration of the governor 100. The front configuration of the governor 100 in FIG. 2 is a front configuration when viewed from the X1 direction illustrated in FIG. 1.

  The speed governor 100 includes a speed control rope 101 connected to the car 30, a sheave 102 fixed to a horizontal shaft 104 supported by a frame 103 and wound around the speed control rope 101, and the rope. The first speed governor A that regulates the rotational speed of the car 102 and detects the overspeed is connected to the horizontal shaft 104 and the clutch 105, and the sheave 102 rotates during the descent operation of the car 30. A second governor B that regulates the speed and detects the descending overspeed and an encoder 106 attached to the horizontal shaft 104 are configured.

  The horizontal shaft 104 is supported by a frame 103 installed in the machine room 70 via a bearing, for example. The rotating body A1 of the first speed governor A is fixedly attached to one side of the horizontal shaft 104, and the rotating body B1 of the second speed governor B is attached to the other side of the horizontal shaft 104 via the clutch 105. It has been. As the clutch 105, for example, a cam-type one-way clutch is used. An inner ring of the cam-type one-way clutch is fixed to the horizontal shaft 104, and an outer ring is fixed to the rotating body B1. The clutch 105 transmits the rotating operation of the sheave 102 to the rotating body B1 of the second governor B when the car 30 is descending, and from the sheave 102 to the second governor during the ascending operation of the car 30. Release the transmission of rotational motion to B.

  The first speed governor A includes a rotating body A1, a pendulum (not shown) that is attached to the rotating body A1 and is displaced according to the rotation of the rotating body A1, and a car stop switch. The second speed governor B includes a rotating body B1, a pendulum (not shown) that is attached to the rotating body B1 and is displaced according to the rotation of the rotating body B1, and a car stop switch.

  The first governor A is configured such that the car stop switch in the first governor A is turned on by the displacement of the pendulum when the ascending / descending speed of the car 30 reaches 1.3 times the rated speed. Then, it is detected that the ascending speed of the car 30 has reached 1.3 times the rated speed. In the second governor B, when the descending speed of the car 30 reaches 1.3 times the rated speed, the car stop switch in the second governor B is turned on by the displacement of the pendulum. It is comprised, and it detects that the raising / lowering speed of the car 30 has reached 1.3 times the rated speed.

  As the first speed governor A and the second speed governor B, for example, a flyweight speed governor as described in Patent Document 1 is used, but is not limited thereto.

  In the elevator apparatus 1 according to the present embodiment, the rated speed in the descending direction is lower than the rated speed in the ascending direction in order to reduce the ear-closed feeling that the passenger's ears become tight due to a sudden change in atmospheric pressure due to the raising and lowering of the car 30. Is set low. In response to this, when the first speed governor A for lifting detects that the ascending / descending speed of the car 30 has reached 1.3 times the rated speed in the ascending direction, the hoisting machine that drives the car 30 The power source 80 and the power source of the control device 90 that controls the hoist 80 are cut off.

  On the other hand, when the second governor B for descent detects that the ascending / descending speed of the car 30 has reached 1.3 times the rated speed in the descending direction, the power supply of the hoisting machine 80 that drives the car 30 And the power supply of the control apparatus 90 which controls this hoisting machine 80 is interrupted | blocked, respectively. Further, when the descending speed of the car 30 reaches 1.4 times the rated speed for some reason, the second governor B operates the emergency stop device 201 provided in the car 30 to mechanically move the car 30. Emergency stop.

  That is, when the pendulum attached to the rotating body B1 is further displaced, for example, a mechanism as described in Patent Document 1 is used to sandwich the speed control rope 101 and stop the movement of the speed control rope 101. Then, as shown in FIG. 1, the operating lever 202 connected to the speed-control rope 101 that has stopped moving is pulled up by further lowering the car 30, and the emergency stop device 201 is operated by the pulled-up operating lever 202. The guide rail 60 is gripped by the wedge, and the car 30 is mechanically emergency-stopped.

  Note that the second speed governor B cancels transmission of the rotational motion from the sheave 102 by the clutch 105 during the ascending operation of the car 30 and stops speed control. Thus, in order to detect the predetermined overspeed in the upward direction and to detect the predetermined overspeed in the downward direction, the first speed governor A for increasing and the second speed governor B for decreasing The speed setting value is set to a different value.

  The control device 90 also monitors the soundness of the clutch 105 provided in the speed governor 100 that is one of the safety devices of the car 30 that moves up and down at different vertical speeds, and when an abnormality occurs in the clutch 105. In order to ensure safety, control is performed to reduce so-called confinement. Processing for reducing confinement by the control device 90 will be described with reference to FIGS.

  When determining whether or not an abnormality has occurred in the clutch 105, the control device 90 receives, for example, a detection signal indicating the upward direction from among the detection signals from the encoder 106 that detects the rotation direction of the speed adjusting rope 101. When the detection signal indicating that the pendulum is displaced is received from the second governor B in which the pendulum is displaced only when the car 30 is descending, an abnormality has occurred in the clutch 105. Judge that.

  FIG. 3 shows the procedure of the first emergency operation process. The first emergency operation process is a process executed by the control device 90 based on detection signals from the second governor B and the encoder 106, and the control device 90 detects that the clutch 105 is abnormal during the ascending operation of the car 30. It is executed at the timing when is detected.

  First, the control device 90 determines the operation direction of the car 30 based on the elevator operation command or the detection signal from the encoder 106, and determines whether or not the car 30 is currently in the ascending operation (SP1).

  Next, when the control device 90 obtains a negative result in the determination at step SP1, the control device 90 continues to determine the traveling direction of the car 30. On the other hand, if the control device 90 obtains a positive result in the determination at step SP1, whether or not the pendulum is displaced in the second governor B is determined based on the detection signal from the second governor B. Is determined (SP2).

  Next, when the control device 90 obtains a negative result in the determination at step SP2, the control device 90 proceeds to step SP1 and determines the operation direction of the car 30 again. On the other hand, when the control device 90 obtains a positive result in the determination at step SP2, it is normal that the pendulum of the second governor B is stopped when the car 30 is originally in the ascending operation. If there is a displacement without stopping, it is determined that an abnormality has occurred in the clutch 105 and emergency operation control is executed.

  As an emergency operation here, for example, the control device 90 decelerates the operation speed of the car 30 to a low-speed operation, and continues the operation only for ascent that can ensure safety in the operation of the elevator (SP3), and ends this processing. To do.

  Passengers in the car 30 can get off the car 30 on the next stopped floor. Then, the control device 90 stops the operation of the car 30 and notifies the abnormality to the outside.

  As described above, according to the present embodiment, the soundness of the clutch 105 is constantly monitored, and if an abnormality occurs in the clutch 105 during the ascending operation of the car 30 that can ensure safety in the operation of the elevator apparatus 1, the car immediately Instead of stopping the operation of the car 30, the car 30 is switched to the emergency operation and continuously operated so that the passenger can get off the car 30, so that it is possible to prevent so-called confinement. Therefore, it is possible to improve the usability of the elevator apparatus 1 by reducing confinement while ensuring safety.

  In addition, when monitoring the soundness of the clutch 105, the control device 90 determines the operating direction of the car 30 based on the detection signal of the encoder 106 attached to the horizontal shaft 104 of the governor 100. Control related to the speed governor 100 can be performed based on the state of the devices constituting the speed governor 100. Therefore, the control path can be simplified and the reliability can be improved.

  In the present embodiment, the operation direction of the car 30 is determined based on the detection signal of the encoder 106 attached to the horizontal shaft 104 of the speed governor 100. However, the present invention is not necessarily limited to this. The traveling direction of the car 30 may be determined based on a detection signal from an encoder (not shown) provided in the upper machine 80 or a control command from the control device 90. Further, the abnormality of the clutch 105 is determined on the basis of the displacement of the pendulum of the second governor B during the ascending operation of the car 30. However, the present invention is not limited to this. It may be detected based on this.

(2) Second Embodiment The second embodiment is different from the first embodiment in that when the control device 90 detects an abnormality of the clutch 105, the car 30 is raised to the registration floor. . In the second embodiment, a configuration different from the first embodiment will be described.

  FIG. 4 shows the procedure of the second emergency operation process. Since the processing of steps SP11 and SP12 is the same as the processing of steps SP1 and SP2 in the first emergency operation processing (FIG. 3), description thereof is omitted here. When the control device 90 obtains a positive result in the determination at step SP12, it determines that an abnormality has occurred in the clutch 105, and performs an emergency operation.

  As an emergency operation here, for example, the control device 90 decelerates the operation speed of the car 30 to a low-speed operation, stops the operation after driving to a pre-registered destination floor (SP13), and ends the present process.

  Passengers in the car 30 can get out of the car 30 after the car 30 stops on the destination floor. The control device 90 then notifies the outside of the abnormality.

  As described above, according to the present embodiment, even if an abnormality is detected in the clutch 105, the ascending operation is normal, so the operation of the car 30 is not stopped immediately, but the car 30 is Switching to the emergency operation and continuing the operation, the car 30 can be stopped after traveling to the passenger's destination floor, so that the confinement can be prevented. Therefore, the usability of the elevator apparatus 1 can be improved while ensuring safety.

(3) Third Embodiment The third embodiment is different from the first embodiment in that the control device 90 causes the car 30 to be lifted up to the nearest floor when the abnormality of the clutch 105 is detected. Different. In the third embodiment, a configuration different from the first embodiment will be described.

  FIG. 5 shows the procedure of the third emergency operation process. Since the processing of steps SP21 and SP22 is the same as the processing of steps SP1 and SP2 in the first emergency operation processing (FIG. 3), description thereof is omitted here. When the control device 90 obtains a positive result in the determination at step SP22, it determines that an abnormality has occurred in the clutch 105, and performs an emergency operation.

  As an emergency operation here, for example, the control device 90 reduces the operation speed of the car 30 to a low speed operation, stops after driving to the nearest floor (SP13), and ends this processing.

  Passengers in the car 30 can get off the car 30 after the car 30 stops at the nearest floor. The control device 90 then notifies the outside of the abnormality.

  As described above, according to the present embodiment, even if an abnormality is detected in the clutch 105, the ascending operation is normal, so the operation of the car 30 is not stopped immediately, but the car 30 is Switching to the emergency operation and continuing the operation, the car 30 can be stopped after operating to the nearest floor, so that the confinement can be prevented. Therefore, the usability of the elevator apparatus 1 can be improved while ensuring safety.

  In the description of each of the embodiments described above, the control device 90 is provided in the machine room 70 to control the hoisting machine 80, and an example in which abnormality determination of the cam clutch is performed has been described. As a device 90, an electronic safety base for determining the abnormality of the cam clutch is provided in another location, and when the electronic safety base determines that the cam clutch is abnormal, a signal indicating that the cam clutch is abnormal is output. In addition, the control device 90 can be configured by a control mechanism such as a control base installed at a plurality of locations so that the abnormal signal is transmitted to a control portion that controls the hoisting machine 80.

DESCRIPTION OF SYMBOLS 1 Elevator apparatus 30 Car 101 Speed control rope 102 Sheave 104 Horizontal shaft 105 Clutch 106 Encoder A 1st speed governor B 2nd speed governor

Claims (4)

The hoisting machine is moved up and down in the hoistway, the hoisting machine raising and lowering the car up and down via the main rope, and the hoisting machine so that the hoisting speed is different between the ascending operation and the descending operation of the car. A control device that controls and controls the operation of the car; an encoder that detects a direction of operation of the car and outputs a detection signal indicating the direction of operation to the control device; and a speed-control rope connected to the car And a sheave fixed to a horizontal shaft and wrapped around the speed-control rope, and connected to the horizontal shaft, and during the ascending operation of the car, the rotational speed of the sheave is adjusted to adjust the speed of the car. The first speed governor for detecting the overspeed is connected to the horizontal shaft and the clutch. During the descent operation of the car, the rotational speed of the sheave is adjusted to reduce the overspeed of the car. A second governor for detecting the clutch, and the clutch During the descending operation, the rotational operation of the sheave is transmitted to the rotating body of the second governor, and during the ascending operation of the car, the rotational operation is transmitted from the sheave to the second governor. In the elevator device that releases
The control device includes:
Based on the detection signal from the encoder and the detection signal detected in the second governor, it is determined whether or not the clutch is abnormal during the ascending operation of the car, and the clutch is abnormal An elevator apparatus characterized by controlling so that the operation of the car is switched to emergency operation when it is determined. The controller is
2. The elevator apparatus according to claim 1, wherein as the emergency operation, the operation speed of the car is reduced to a low speed operation, and control is performed so as to continue the operation only for ascent. The controller is
2. The elevator apparatus according to claim 1, wherein, as the emergency operation, the operation speed of the car is reduced to a low speed operation, and control is performed so as to stop after driving to a pre-registered destination floor. The controller is
2. The elevator apparatus according to claim 1, wherein, as the emergency operation, the operation speed of the car is reduced to a low speed operation, and control is performed so as to stop after driving to the nearest floor.

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