JP2014015275A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device capable of reducing a stopping distance of an elevator car at the time of emergency braking without increasing cost.SOLUTION: An elevator device includes: a guide device which is provided at an elevator car or a balance weight, and which guides moving up/down of the elevator car or the balance weight by moving along a guide rail 3; and a guide roller 17 which is provided at the guide device and which rotates on the surface of the guide rail 3. The guide device includes a power generator 20 in which a rotation shaft rotates to generate power. The power generator 20 is connected to the guide roller 17 in such a manner that the rotation of the guide roller 17 when the elevator car or the balance wight moves up/down is transmitted to the rotation shaft.

Description

  The present invention relates to an elevator apparatus.

  In general, an elevator wraps a rope around a sheave of a hoist installed in a machine room or a hoistway, and raises and lowers a car by a frictional force between the sheave and the rope. In this case, when an emergency braking such as a power failure occurs, if the rope slip occurs between the sheave and the rope, the stopping distance may be increased. Also, in recent years, there is also a legal restriction on the door-opening travel protection device that provides for the moving distance of the car in an abnormal state where the elevator travels with the door open, so that the stopping distance can be reduced. Is even more important.

  In order to reduce the stopping distance, conventionally, the weight of the cage suspended at one end of the rope and the mass of the counterweight suspended at the other end are both increased. In this way, the ratio of the tension of the rope on the cage side to the tension of the rope on the counterweight on the sheave is reduced to reduce the rope slip and prevent the stop distance from increasing.

  As another technique for reducing the rope slip, for example, Patent Literature 1 discloses a braking control device that controls the braking force of the hoisting machine.

  Patent Document 2 discloses a braking device that prevents rotation of the guide roller in order to prevent vibration.

JP 2004-231355 A Japanese Utility Model Publication No. 40-008979

  As described above, in order to reduce the stopping distance of the car during emergency braking, both the car and the weight of the counterweight must be increased. However, if the weight of the car and the counterweight is increased, the cost will increase. Therefore, it is necessary to reduce the stopping distance without increasing the weight of the car and the counterweight.

  Further, for example, when the technology for controlling the braking force of the hoisting machine as disclosed in Patent Document 1 is used, the car speed as the rope speed and the hoisting machine motor speed as the sheave speed are constantly measured. There is also a need for a means for controlling the brake torque. Therefore, with this technique, the apparatus becomes complicated, and there is a possibility that the cost will increase.

  For example, in the technology for preventing the rotation of the guide roller as disclosed in Patent Document 2, the guide roller is pressed by a lever to prevent the rotation of the guide roller, and the guide roller and the guide rail are rubbed. For this reason, it is expected that the lever, the guide roller, and the guide rail are worn, and maintenance is required to check the degree of wear and replace worn parts. Therefore, this technique may increase the time and cost for maintenance and inspection.

  The objective of this invention is providing the elevator apparatus which can reduce the stop distance of the car at the time of emergency braking, without increasing cost.

  The elevator apparatus according to the present invention has the following features. A guide device that is provided on the elevator car or counterweight and moves along the guide rail to guide the raising or lowering of the car or the counterweight, and is provided on the guide device and rotates on the surface of the guide rail. The guide device includes a generator that generates electric power by rotating a rotating shaft, and the generator rotates the guide roller when the car or the counterweight moves up and down. Is connected to the guide roller so as to be transmitted to the rotating shaft.

  In the elevator apparatus according to the present invention, the stopping distance of the car during emergency braking can be reduced without increasing the cost.

It is a figure which shows the structural example of the elevator apparatus by the Example of this invention. It is a partial top view of a car side guide device or a counterweight side guide device. It is a partial side view of a passenger car side guide device or a counterweight side guide device.

  In the elevator apparatus according to the present invention, the generator is attached to the guide apparatus that guides the car and the counterweight with respect to the guide rail. The generator is connected to the guide roller so that the rotation of the guide roller is transmitted, and generates power during emergency braking. Since the power generated by the generator generates a resistance force that decelerates the car, the stopping distance of the car during emergency braking is reduced. By configuring the elevator apparatus in this way, the stopping distance of the car during emergency braking can be reduced with a simple apparatus configuration in which a generator is attached to an existing guide apparatus. Therefore, the elevator apparatus according to the present invention can reduce the stop distance of the car during emergency braking without increasing the mass of the car and the counterweight, and thus without increasing the cost. In addition, maintenance and maintenance inspection are easy.

  If the guide roller and the generator are connected at all times, for example, resistance will occur even when accelerating or traveling at the rated speed, causing extra load on the elevator motor, or between the sheave and the rope. It may be necessary to have extra traction capability. Therefore, by switching the connection state between the guide roller and the generator according to the traveling state, that is, disconnecting the guide roller and the generator during normal traveling and connecting them during emergency braking, the generator can generate power. Alternatively, it may act as a resistance force for braking the car only during emergency braking.

  A resistor may be connected to the generator. By adjusting the resistance value of the connected resistor, the torque generated in the generator can be adjusted, and the stopping distance of the car can be adjusted.

  The electric power generated by the generator may be transmitted to an external device as an electric signal. By transmitting the electrical signal, it is possible to notify the outside of the management room or the like that emergency braking has occurred.

  Embodiments of an elevator apparatus according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration example of an elevator apparatus according to an embodiment of the present invention. The elevator apparatus frictionally drives the main rope 7 via the hoisting machine sheave 8 by the power of the motor of the hoisting machine 9 to raise and lower the car 1 that is suspended from the main rope 7. A total of four car-side guide devices 2 are attached to the car 1, two at the top and two at the bottom. The car-side guide device 2 moves up and down along the car-side guide rail 3 to guide the car 1, so that the car 1 moves up and down.

  A car top pulley 11 and a counterweight top pulley 12 are provided at the top of the elevator apparatus. A car lower pulley 10 is provided on the left and right of the lower part of the car 1. The car top pulley 11, the counterweight top pulley 12, and the car lower pulley 10 are wound around the main rope 7 and function to change the direction of the main rope 7.

  On the side opposite to the car 1 with respect to the hoisting machine sheave 8, the counterweight 4 is suspended from the main rope 7 via the counterweight top pulley 12 and the counterweight pulley 13. A total of four counterweight-side guide devices 5 are attached to the counterweight 4, two at the top and two at the bottom. When the counterweight-side guide device 5 moves in the vertical direction along the counterweight-side guide rail 6 to guide the counterweight 4, the counterweight 4 moves up and down.

  The car-side guide device 2 attached to the upper portion of the car 1 is provided with a base 14 at the lower part of the car-side guide device 2. Further, the car-side guide device 2 attached to the lower part of the car 1 is provided with a base 14 at the upper part of the car-side guide device 2. Similarly, the counterweight-side guide device 5 has a base 14 provided at the lower portion of the counterweight-side guide device 5 in the counterweight-side guide device 5 attached to the upper portion of the counterweight 4. The counterweight-side guide device 5 attached to the lower portion is provided with a base 14 on the upper portion of the counterweight-side guide device 5. The car-side guide device 2 and the counterweight-side guide device 5 are attached to the car 1 and the counterweight 4 by a base 14, respectively.

  2A and 2B are views showing a part of the car-side guide device 2 or the counterweight-side guide device 5. FIG. 2A is a top view of the car-side guide device 2 or the counterweight-side guide device 5, and FIG. 2B is a side view of the car-side guide device 2 or the counterweight-side guide device 5. Below, FIG. 2A and FIG. 2B demonstrates as what shows a part of the passenger car side guide apparatus 2. FIG. 2A and 2B show the car-side guide device 2 attached to the upper part of the car 1 as an example. That is, the base 14 is provided in the lower part of the car-side guide device 2.

  As shown in FIGS. 2A and 2B, the car-side guide device 2 includes a base 14, a lever 16, a guide roller 17, a guide roller 27, a generator 20, and an electromagnetic clutch 22. The lever 16, the guide roller 17, the guide roller 27, the generator 20, and the electromagnetic clutch 22 are attached to the base 14.

  The lever 16 is supported with respect to the base 14 so as to be rotatable about the lever shaft 15 as a rotation axis. A roller shaft 17 ′ is attached to the lever 16.

  The guide roller 17 is supported by the roller shaft 17 ′ so as to be rotatable about the roller shaft 17 ′, and rolls on the rail upper surface of the car-side guide rail 3.

  The guide roller 27 is supported by the roller shaft 28 so as to be rotatable about the roller shaft 28 as a rotation shaft, and rolls on the rail side surface of the car-side guide rail 3. The roller shaft 28 is attached to a bracket 26 provided on the base 14.

  A rod 18 is attached to the base 14, and a spring 19 is attached to the rod 18. The spring 19 presses the lever 16 in the rotation direction of the lever 16 (toward the direction in which the car-side guide rail 3 is present). The guide roller 17 is pressed against the car-side guide rail 3 by the spring 19 pressing the lever 16.

  The generator 20 can be an existing generator that generates electric power by rotating a rotating shaft, for example, a DC generator such as a commutator generator (dynamo) or an AC generator such as a three-phase AC generator. A pulley B24 is attached to the rotating shaft of the generator 20.

  Furthermore, a pulley A23 is attached to the base 14 on an extension line in the longitudinal direction of the roller shaft 17 '. A belt 25 is wound around the pulley A23 and the pulley B24. Therefore, when the pulley A23 rotates, the pulley B24 rotates and the rotating shaft of the generator 20 also rotates.

  The electromagnetic clutch 22 is provided between the guide roller 17 and the generator 20 and has a role of connecting and disconnecting the guide roller 17 and the generator 20. An abnormality detection device 30 is connected to the electromagnetic clutch 22, and the electromagnetic clutch 22 can be connected or disconnected using the abnormality detection device 30. When the electromagnetic clutch 22 is connected, the roller shaft 17 'and the shaft of the pulley A23 can be connected. When the electromagnetic clutch 22 is disconnected, the roller shaft 17' and the shaft of the pulley A23 can be disconnected. An existing electromagnetic clutch 22 can be used.

  The electromagnetic clutch 22 separates the roller shaft 17 ′ and the pulley A23 during normal operation, and when the abnormality detection device 30 detects an elevator abnormality such as door-opening traveling, the roller shaft 17 ′ and the pulley A23 shaft are disconnected. Connecting. That is, during normal operation, the roller shaft 17 'and the shaft of the pulley A23 are separated from each other, but when the abnormality detection device 30 detects an abnormal state and performs emergency braking, the electromagnetic clutch 22 is connected to the roller shaft 17'. The shaft of the pulley A23 is connected.

  When the roller shaft 17 ′ and the shaft of the pulley A23 are connected, the rotational force of the guide roller 17 is applied to the rotating shaft of the generator 20 via the roller shaft 17 ′, the pulley A23, the belt 25, and the pulley B24. Communicated. The generator 20 generates electric power by rotating the rotation shaft, and the torque of the generator 20 generated during power generation becomes a resistance force that suppresses the rotation of the guide roller 17. That is, the rotation of the guide roller 17 is suppressed by the power generation of the generator 20, and the speed of rolling on the rail upper surface of the car-side guide rail 3 is reduced. Therefore, at the time of emergency braking, it is possible to generate a resistance force that decelerates the car 1 by power generation by the generator 20, and to reduce the stopping distance of the car 1. Thus, the elevator apparatus according to the present embodiment brakes the car 1 using the resistance generated by the power generation of the generator 20.

  Instead of the pulley A23, the pulley B24, and the belt 25 for transmitting the rotational force, other transmission mechanisms such as a combination of a sprocket and a chain may be used.

  In the configuration shown in FIG. 2, the generator 20 is connected to a resistor 21. The resistor 21 consumes the electric power generated by the generator 20 during emergency braking. By adjusting the resistance value of the resistor 21 to be connected, the torque generated in the generator 20 is adjusted, the resistance force for suppressing the rotation of the guide roller 17 is changed, and the stopping distance of the car 1 can be adjusted. it can. For example, when the resistance value of the resistor 21 is reduced, the torque generated in the generator 20 can be increased, and the stopping distance of the car 1 can be reduced. The resistor 21 can be provided at an arbitrary place, and can be provided, for example, inside the car-side guide device 2 or inside an elevator control panel (not shown).

  Further, by transmitting the electric power generated by the generator 20 as an electric signal to an external management room or the like, it is possible to notify the outside that emergency braking has occurred in the elevator. For example, if the generator 20 is connected to the receiving device of the management room with a signal line and a warning is issued when the receiving device receives an electrical signal from the generator 20, an emergency braking has occurred in the elevator in the management room. Can be recognized.

  In the configuration shown in FIG. 2, the generator 20 is connected to the guide roller 17 that rolls on the rail upper surface of the car-side guide rail 3 via the electromagnetic clutch 22. The generator 20 may be connected to a guide roller 27 that rolls on the rail side surface of the car-side guide rail 3. In this case, the electromagnetic clutch 22 connects or disconnects the roller shaft 28 of the guide roller 27 and the shaft of the pulley A23.

  A plurality of generators 20 may be provided, and the generator 20 may be connected to each of a guide roller 17 that rolls on the rail upper surface of the car-side guide rail 3 and a guide roller 27 that rolls on the rail side surface. . That is, the generator 20 can be connected to any one or a plurality of guide rollers that roll on the rails of the car-side guide rail 3.

  In the configuration shown in FIG. 1, four car-side guide devices 2 are attached to the car 1, but the generator 20 can be provided in one or more car-side guide devices 2. When the generator 20 is provided in the plurality of car-side guide devices 2, in order to balance the car 1 in the horizontal direction (the left-right direction in FIG. 1), the car-side guide at a symmetrical position in the horizontal direction. The device 2 is preferably provided with a generator 20.

  2A and 2B show the car-side guide apparatus 2 attached to the upper part of the car 1, and the base 14 is provided at the lower part of the car-side guide apparatus 2 (FIG. 1). See). When the generator 20 is provided in the car-side guide device 2 attached to the lower part of the car 1, the generator 20 is attached under the base 14. Other parts such as the lever 16, the guide roller 17, the guide roller 27, and the electromagnetic clutch 22 are also attached under the base 14.

  Further, the generator 20 may be provided in the counterweight-side guide device 5 that moves along the counterweight-side guide rail 6. Since the configuration and effects when the generator 20 is provided in the counterweight side guide device 5 are the same as those when the generator 20 is provided in the car side guide device 2, description thereof is omitted.

  DESCRIPTION OF SYMBOLS 1 ... Ride car, 2 ... Ride side guide device, 3 ... Ride side guide rail, 4 ... Balance weight, 5 ... Balance weight side guide device, 6 ... Balance weight side guide rail, 7 ... Main rope, 8 ... Winding Upper machine sheave, 9 ... Hoisting machine, 10 ... Car lower pulley, 11 ... Car top pulley, 12 ... Counterweight top pulley, 13 ... Counterweight pulley, 14 ... Base, 15 ... Lever shaft, 16 ... Lever, 17 ... guide roller, 17 '... roller shaft, 18 ... rod, 19 ... spring, 20 ... generator, 21 ... resistor, 22 ... electromagnetic clutch, 23 ... pulley A, 24 ... pulley B, 25 ... belt, 26 ... Bracket, 27... Guide roller, 28... Roller shaft, 30.

Claims (5)

A guide device that is provided on the elevator car or counterweight and moves along the guide rail to guide the raising or lowering of the car or the counterweight, and is provided on the guide device and rotates on the surface of the guide rail. In an elevator apparatus comprising a guide roller that
The guide device includes a generator that generates electricity by rotating a rotating shaft;
The elevator apparatus, wherein the generator is connected to the guide roller so that rotation of the guide roller when the car or the counterweight moves up and down is transmitted to the rotating shaft. The guide device includes an electromagnetic clutch between the guide roller and the generator,
The elevator apparatus according to claim 1, wherein the electromagnetic clutch disconnects the guide roller and the generator during normal operation, and connects the guide roller and the generator during emergency braking.   The elevator apparatus according to claim 2, wherein the electromagnetic clutch is connected to an abnormality detection device, and when the abnormality detection device detects an abnormality of the elevator, the guide roller and the generator are connected.   The elevator apparatus according to claim 1, wherein the generator is connected to a resistor that consumes the generated power.   The elevator apparatus according to any one of claims 1 to 4, wherein the generator transmits generated electric power as an electric signal to an external apparatus.

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