JPWO2005115905A1 - Elevator equipment - Google Patents

Abstract

In the elevator apparatus, the traveling speed of the car is monitored by the speed monitoring unit. The speed monitoring unit generates an abnormality detection signal when the raising speed of the car reaches a preset overspeed. The car is equipped with an upward emergency stop device that stops the raising of the car when an abnormality detection signal is generated. The upward emergency stop device includes an actuator that is driven according to whether an abnormality detection signal is generated and a braking member that is operated by the actuator.

Description

  The present invention relates to an elevator apparatus in which a car is guided up and down in a hoistway by being guided by a car guide rail.

For example, in the conventional elevator apparatus disclosed in Japanese Patent Application Laid-Open No. 2001-80840, when the traveling speed of the car reaches an abnormal speed, the emergency stop device is actuated by the speed governor and the car is emergency stopped. Specifically, when an abnormal speed of the car is detected by the speed governor, the speed governor rope is gripped by a rope gripping device built into the speed governor and is emergency-stopped via a safety link mounted on the car. The device is activated.
However, in the conventional elevator apparatus, since the operation force for operating the emergency stop device is mechanically transmitted, it takes time until the emergency stop device operates after the abnormal speed is detected, and the car stops. The braking distance up to is also increased.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator apparatus that can shorten the time from when an abnormal speed is detected until the car is stopped.
The elevator apparatus according to the present invention includes a car that is raised and lowered in the hoistway, a car guide rail that guides the raising and lowering of the car, and a speed that generates an abnormality detection signal when the ascending speed of the car reaches a preset overspeed. A monitoring unit and an actuator mounted on the car and driven according to whether or not an abnormality detection signal is generated and a braking member that is operated by the actuator, and guides the braking member when the abnormality detection signal is generated An upward emergency stop device is provided for engaging the rail to stop the raising of the car.

1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention,
FIG. 2 is a graph showing a set overspeed pattern stored in the abnormal speed determination unit of FIG.
FIG. 3 is a side view showing the upper emergency stop device of FIG.
4 is a side view showing a braking state of the upper safety device in FIG.
FIG. 5 is a sectional view taken along the line VV in FIG.
FIG. 6 is a side view showing an upward emergency stop device for an elevator apparatus according to Embodiment 2 of the present invention;
7 is a side view showing a braking state of the upper safety device in FIG.
FIG. 8 is a side view showing an upward emergency stop device for an elevator apparatus according to Embodiment 3 of the present invention;
9 is a side view showing a braking state of the upper safety device in FIG.
10 is a cross-sectional view taken along line XX 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 pair of car guide rails 2 are installed in a hoistway 1. The car 3 is raised and lowered in the hoistway 1 while being guided by the car guide rail 2.
The car 3 is suspended in the hoistway 1 together with a counterweight (not shown) by a plurality of main ropes (not shown). The main rope is wound around a drive sheave of a drive device (not shown). The car 3 and the counterweight are moved up and down in the hoistway 1 by the driving force of the driving device.
A pair of upper car guide shoes 4 that engage with the car guide rail 2 are provided on the upper part of the car 3. A pair of lower car guide shoes 5 that engage with the car guide rail 2 are provided at the lower part of the car 4.
In addition, a pair of upward emergency stop devices 6 for emergency stopping the ascending car 3 is mounted on the upper part of the car 3. A pair of downward emergency stop devices 7 for emergency stopping the descending car 3 are mounted on the lower part of the car 3.
The speed monitoring unit 8 monitors whether or not the speed of the car 3 has reached a preset overspeed (abnormal speed). The speed monitoring unit 8 is provided with a position detection unit 9 that detects the position of the car 3, a speed detection unit 10 that detects the speed of the car 3, and an abnormal speed determination unit 11 that compares the set overspeed and the car speed. ing.
A signal from the sensor 12 is input to the position detection unit 9. The sensor 12 generates a signal corresponding to the movement amount of the car 3. The position detection unit 9 obtains the car position based on the signal from the sensor 12. The speed detection unit 10 obtains the car speed from the time change amount of the car position.
As the sensor 12, for example, an encoder that outputs a pulse signal according to the rotation of a governor sheave (not shown) can be used. Alternatively, a detection roller that rolls along the car guide rail 2 may be mounted on the car 3 so that the encoder outputs a pulse signal in accordance with the rotation of the detection roller. In addition, as the sensor 12, various sensors such as a distance sensor that generates a signal corresponding to the distance to the car 3 are used as long as the sensor 12 generates a signal for detecting the position and speed of the car 3. be able to.
Specifically, the speed monitoring unit 8 is configured by a microcomputer. That is, the speed monitoring unit 8 includes a CPU (processing unit), a RAM, a ROM (storage unit), a timer, and the like. The CPU executes arithmetic processing for obtaining the car position and the car speed, arithmetic processing for comparing the car speed and the set overspeed, and the like. Calculation data is stored in the RAM. The ROM stores a program for obtaining the car position and car speed and comparing it with the set overspeed.
The CPU executes arithmetic processing based on a program stored in the ROM. The speed monitoring program is repeatedly executed every predetermined calculation cycle (for example, 5 msec).
If the abnormal speed discriminating unit 11 determines that the car speed is abnormal, an abnormality detection signal is output to the upward emergency stop operating means 13 or the downward emergency stop operating means 14 according to the traveling direction of the car 3. As a result, the upward emergency stop operating means 13 or the downward emergency stop operating means 14 is operated, and the car 3 is emergency stopped.
The speed monitoring unit 8 and the emergency stop operating means 13 and 14 may be provided in a control panel (not shown) for controlling the normal operation of the car 3, or may be provided separately from the control panel. Further, the speed monitoring unit 8 and the emergency stop operating means 13 and 14 can be mounted on the car 3.
FIG. 2 is a graph showing a set overspeed pattern stored in the abnormal speed determination unit 11 of FIG. When the car 3 travels at a normal speed (rated speed) from the lower terminal floor to the upper terminal floor, the speed pattern of the car 3 is a normal speed pattern 115. The first set overspeed pattern 116 is set higher than the normal speed pattern 115. The second set overspeed pattern 117 is set to be higher than the first set overspeed pattern 116.
The first and second set overspeed patterns 116 and 117 are set so as to be substantially equidistant from the normal speed pattern 115 in the entire lifting process. That is, the set overspeed patterns 116 and 117 change according to the car position. Specifically, the set overspeed decreases as the terminal floor is approached. Therefore, it is determined that the vicinity of the terminal floor is abnormal at a lower speed than the vicinity of the intermediate floor.
3 is a side view showing the upper safety device 6 shown in FIG. 1, FIG. 4 is a side view showing a braking state of the upper safety device 6 shown in FIG. 3, and FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG.
In the figure, an emergency stop frame 15 is fixed on the upper beam of the car 3. A pair of guide surfaces 15 a and 15 b (FIG. 5) facing the side surface of the car guide rail 2 are formed inside the emergency stop frame 15. The guide surfaces 15a and 15b are formed in a tapered shape so that the distance from the car guide rail 2 is increased upward.
A lower end portion of a pair of wedge members (braking members) 16 is disposed between the guide surfaces 15 a and 15 b and the car guide rail 2. The wedge member 16 can be displaced between the normal position shown in FIG. 3 and the braking position shown in FIG. When in the normal position, a predetermined distance is maintained between the wedge member 16 and the side surface of the car guide rail 2. Further, when in the braking position, the wedge member 16 is in contact with the side surface of the car guide rail 2.
An actuator 17 is disposed above the emergency stop frame 15. The actuator 17 is driven according to whether or not an abnormality detection signal is generated in the abnormal speed determination unit 11. The actuator 17 has a movable portion 18 that engages with the upper end portion of the wedge member 16 and an electromagnetic solenoid portion 19 that drives the movable portion 18.
In the normal state, the upper end portion of the wedge member 16 is engaged with the movable portion 18, and the wedge member 16 is held in the normal position. When electric power is supplied from the upward emergency stop operating means 13 in response to the occurrence of the abnormality detection signal, the electromagnetic solenoid portion 19 is excited and the movable portion 18 is separated from the wedge member 16. When the engagement with the movable portion 18 is released, the wedge member 16 falls to the braking position due to its own weight.
A spring receiver 20 is fixed to the upper portion of the actuator 17. Between the spring receiver 20 and the upper end portion of the wedge member 16, an auxiliary spring 21 that biases the wedge member 16 toward the braking position is provided. The auxiliary spring 21 is a biasing means for backup that forcibly displaces the wedge member 16 to the braking position when the wedge member 16 does not fall due to its own weight due to rust or the like.
Between the guide surfaces 15a, 15b and the wedge member 16, a guide roller device 22 (FIG. 5) for smoothly displacing the wedge member 16 to the braking position is provided.
The operation of the left and right upward emergency stop device 6 is synchronized by an electrical command signal.
Next, the operation will be described. During normal operation, the car speed is monitored by the speed monitoring unit 8. If the car speed is normal, the wedge member 16 is held in the normal position, and the wedge member 16 is separated from the car guide rail 2. When the car speed reaches the first set overspeed, the energization to the drive device is cut off, and the rotation of the drive sheave is braked by the brake device of the drive device. As a result, the car 3 is suddenly stopped.
Despite outputting a braking command to the drive device, if the increase in the car speed does not stop due to a failure or the like and the car speed reaches the second set overspeed, the abnormality detection signal is detected by the upward emergency stop actuating means 13 or the lower The car 3 is emergency-stopped by the upward-direction emergency stop device 6 or the downward-direction emergency stop device 7.
When an operation signal is input to the actuator 17 of the upward emergency stop device 6, the movable portion 18 is displaced to the right in FIG. 3 and the wedge member 16 falls. The falling wedge member 16 is displaced to the braking position while being guided by the guide surfaces 15a and 15b. When the wedge member 16 is displaced to the braking position, the wedge 3 is bitten between the guide surfaces 15 a and 15 b and the car guide rail 2 by the raising of the car 3. As a result, the car 3 is brought to an emergency stop.
When the upper emergency stop device 6 is returned to the normal state, the car 3 is slightly lowered to release the wedge member 16 and the upper end portion of the wedge member 16 is engaged with the movable portion 18. When the energization of the actuator 17 is interrupted, the movable portion 18 returns to the normal position shown in FIG. 3 by the spring force of a return spring (not shown) built in the actuator 17.
In such an elevator apparatus, when an abnormal speed is detected, a command signal is input to the actuator 17 of the upward emergency stop device 6 and mechanical transmission of the operating force is almost eliminated. The time from the detection to the stop of the car 3 can be shortened. Thereby, a braking distance can also be shortened.
Further, basically, since the wedge member 16 is displaced to the braking position by its own weight, the configuration can be simplified.
Furthermore, since the auxiliary spring 21 is provided, the operation speed of the braking operation can be increased, and the reliability and stability of the braking operation can be improved.
Furthermore, since the set overspeed is set smaller in the vicinity of the terminal floor than in the vicinity of the intermediate floor, the braking distance can be further shortened. In addition, the shock absorber can be miniaturized, and the pit depth and overhead dimensions can be reduced.
In the first embodiment, the electromagnetic solenoid unit 19 is excited to release the engagement of the movable unit 18 with the wedge member 16, but conversely, the electromagnetic solenoid unit 19 is energized. When cut off, the movable part 18 may be displaced by a spring or the like, and the engagement of the movable part 18 with the wedge member 16 may be released.
Embodiment 2. FIG.
Next, FIG. 6 is a side view showing an upward emergency stop device for an elevator apparatus according to Embodiment 2 of the present invention, and FIG. 7 is a side view showing a braking state of the upward emergency stop device in FIG.
In the figure, the actuator 17 is arranged side by side with the emergency stop frame 15 on the car 3. The movable portion of the actuator 17 is connected to the upper end portion of the wedge member 16 via the lever type connecting mechanism 23.
The actuator 17 includes a biasing spring (not shown) that biases the movable portion 18 toward both sides of the neutral point. For example, a disc spring is used as the biasing spring.
When the movable part 18 is displaced from the normal position shown in FIG. 6 to the braking position shown in FIG. 7, the electromagnetic solenoid part 19 is excited to displace the movable part 18 in the right direction in the figure. After passing, it is displaced to the braking position at once by the spring force of the urging spring. As a result, the lever type connecting mechanism 23 is swung counterclockwise about the shaft 23a, and the wedge member 16 is moved to the braking position.
On the contrary, when the movable part 18 is returned from the braking position to the normal position, the electromagnetic solenoid part 19 is excited to displace the movable part 18 in the left direction in the figure. It is displaced to the normal position at once by the spring force. As a result, the lever type connecting mechanism 23 is swung clockwise around the shaft 23a, and the wedge member 16 is returned to the normal position. When the wedge member 16 bites between the guide surfaces 15a and 15b and the car guide rail 2, the actuator 17 is driven while the car 3 is slightly lowered. Other configurations are substantially the same as those of the first embodiment.
In such an elevator apparatus, the return operation of the upward emergency stop device 6 to the normal state can also be performed by a remote command, and workability can be improved. In addition, an operation test of the upward emergency stop device 6 can be easily performed.
Further, since the actuator 17 and the wedge member 16 are connected via the lever type connecting mechanism 23, the displacement of the movable portion 18 can be enlarged and transmitted to the wedge member 16.
In the second embodiment, an actuator having a built-in urging spring is shown. However, the actuator may be one that displaces the movable part only by the electromagnetic force of the electromagnetic solenoid part.
Embodiment 3 FIG.
Next, FIG. 8 is a side view showing an upper emergency stop device for an elevator apparatus according to Embodiment 3 of the present invention, FIG. 9 is a side view showing a braking state of the upper emergency stop device in FIG. 8, and FIG. FIG. 8 is a cross-sectional view taken along line XX.
In the figure, the actuator 17 is installed on the car 3 at a distance from the emergency stop frame 15. A movable pulley support member 24 is fixed to the movable portion 18. The movable pulley support member 24 is provided with a plurality of movable pulleys 25. The movable pulley 25 is disposed symmetrically on both side surfaces of the movable pulley support member 24.
A stationary pulley support member 26 that is opposed to the movable pulley support member 24 is fixed between the emergency stop frame 15 on the car 3 and the actuator 17. The fixed pulley support member 26 is provided with a plurality of fixed pulleys 27. The fixed pulley 27 is disposed symmetrically on both side surfaces of the fixed pulley support member 26.
Wires 28 are alternately wound around the movable pulley 25 and the fixed pulley 27 on one side of the pulley support members 24 and 26. Wires 28 are alternately wound around the movable pulley 25 and the fixed pulley 27 on the other side of the pulley support members 24 and 26. Each wire 28 has a first end 28 a connected to the stationary pulley support member 26 and a second end 28 b connected to the upper end of the wedge member 16.
A pair of first guide pulleys 29 that guide the wire 28 to the wedge member 16 are disposed obliquely above the wedge member 16. The first guide pulley 29 is supported on the upper part of the emergency stop frame 15. A pair of second guide pulleys 30 for guiding the wire 28 to the first guide pulley 29 are provided between the emergency stop frame 15 on the car 3 and the fixed pulley support member 26. Other configurations are substantially the same as those of the first embodiment.
Next, the operation will be described. When an abnormality detection signal is input to the upward emergency stop actuating means 13 (FIG. 1), the actuator 17 is driven, and the movable pulley support member 24 is displaced toward the fixed pulley support member 26 side. That is, the interval between the movable pulley support member 24 and the fixed pulley support member 26 is narrowed. As a result, the wire 28 loses its tension, and the wedge member 16 is displaced to the braking position by its own weight.
When the wedge member 16 is displaced to the braking position, the wedge 3 is bitten between the guide surfaces 15 a and 15 b and the car guide rail 2 by the raising of the car 3. As a result, the car 3 is brought to an emergency stop.
Further, when the movable pulley support member 24 is separated from the fixed pulley support member 26 while the car 3 is slightly lowered, the bite of the wedge member 16 is released, and the wedge member 16 is further connected via the wire 28. Is pulled up and returned to the normal position.
In such an elevator apparatus, the return operation of the upward emergency stop device 6 to the normal state can also be performed by a remote command, and workability can be improved. In addition, an operation test of the upward emergency stop device 6 can be easily performed.
Further, wires 28 for transmitting the operating force of the actuator 17 to the wedge member 16 are alternately wound around the movable pulley 25 and the fixed pulley 27, and the distance between the movable pulley 25 and the fixed pulley 27 changes. Thus, the displacement of the movable portion 18 of the actuator 17 can be sufficiently enlarged and transmitted to the wedge member 16.
The configuration of the upward emergency stop device 6 as shown in the first to third embodiments can be applied to the downward emergency stop device 7 as it is or after a slight change.
In the above example, the speed monitoring unit in which the set overspeed changes depending on the car position is shown. However, the set overspeed may be constant regardless of the car position.
Furthermore, the actuator is not limited to an electromagnetic actuator, and may be various types as long as it is driven in response to generation of an abnormality detection signal, such as a motor having a rotating shaft, a linear motor, a hydraulic cylinder, or an air cylinder An actuator can be used.
Furthermore, the signal exchanged between the speed monitoring unit and the upward emergency stop device is not limited to an electrical signal, and may be, for example, an optical signal.

Claims (7)

A car that is raised and lowered in the hoistway,
A car guide rail that guides the raising and lowering of the car,
A speed monitoring unit that generates an abnormality detection signal when the ascending speed of the car reaches a preset overspeed, and an actuator that is mounted on the car and driven according to whether the abnormality detection signal is generated And an upward emergency stop device for stopping the raising of the car by engaging the braking member with the car guide rail when the abnormality detection signal is generated. Elevator equipment equipped. The elevator apparatus according to claim 1, wherein a set overspeed pattern that changes according to a car position is set in the speed monitoring unit. 2. The elevator apparatus according to claim 1, wherein when the abnormality detection signal is generated in the speed monitoring unit, the braking member falls by its own weight and engages with the car guide rail. The elevator apparatus according to claim 3, wherein the upward emergency stop device is provided with an auxiliary spring that assists the falling of the braking member. 2. The elevator apparatus according to claim 1, wherein the braking member is displaceable between a braking position that engages with the car guide rail and a normal position that separates from the car guide rail by a driving force of the actuator. . The elevator apparatus according to claim 5, wherein the actuator is connected to the braking member via a lever-type connection mechanism. Fixed pulley support member,
A plurality of fixed pulleys provided on the fixed pulley support member;
A movable pulley support member in which a distance between the fixed pulley support member and the fixed pulley support member can be changed by the driving force of the actuator;
A plurality of movable pulleys provided on the movable pulley support member; and the movable pulleys that are alternately wound around the fixed pulley and the movable pulley and connected to the braking member, and are driven by the actuator The elevator apparatus according to claim 1, further comprising a wire for enlarging the displacement of the support member and transmitting it to the braking member.

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