Technical field
[0001]
　The present invention relates to a safety device that performs an emergency stop when a car reaches an abnormal speed, and an elevator including the safety device.
Background technology
[0002]
　As a background art in this technical field, there is Patent Document 1. According to claim 1 of Patent Document 1, "an emergency stop device which is provided on an elevating body and generates a braking force for the elevating body by rotation around an operating axis, and an emergency stop device which is provided on the elevating body are provided. A safety device for an elevator, comprising: an assist motor that generates a torque for returning, and a power transmission unit that transmits the torque generated by the assist motor to the operating shaft.
Prior art documents
Patent literature
[0003]
Patent Document 1: JP 2012-148883 A
Summary of the invention
Problems to be Solved by the Invention
[0004]
　However, the emergency stop device (safety device) of the elevator described in Patent Document 1 uses an assist motor as a means for generating a torque for returning the emergency stop device, and uses a power transmission means such as a gear. It has a structure to return the emergency stop device. Therefore, in order to operate the emergency stop, a device other than the assist motor, such as a speed governor, a speed governor rope or a device for grasping the speed governor, is required, which raises a problem of increasing the cost of the elevator.
[0005]
　Therefore, an object of the present invention is to provide an elevator safety device that can operate and easily return to the emergency stop device with a relatively simple configuration without using a speed governor or the like.
Means for solving the problems
[0006]
　In order to solve the above-mentioned problems, the safety device of the present invention, when the vertical movement of the car reaches an abnormal speed, engages the wedge and the safety device to hold the guide rail, and stops the car. In the above, an abnormal speed detection device that detects an abnormal speed of the car, a drive shaft that interlocks with the wedge, an actuator that applies a drive force to the drive shaft, and a spring that applies a biasing force to the drive shaft, When the car is below an abnormal speed, the wedge and the safety device are disengaged from each other by the driving force of the actuator against the biasing force of the spring. When the car reaches an abnormal speed, the actuator is de-energized, and the wedge and the safety device are brought into an engaged state by the biasing force applied by the spring to grip the guide rail.
Effect of the invention
[0007]
　ADVANTAGE OF THE INVENTION According to this invention, the safety device of the elevator which can operate|move and can return easily the emergency stop device with a comparatively simple structure which does not use a speed governor etc. can be provided.
Brief description of the drawings
[0008]
FIG. 1 is a schematic configuration diagram showing a steady state of the safety device according to the first embodiment.
FIG. 2 is a schematic configuration diagram showing a power failure state of the safety device of the first embodiment.
FIG. 3 is a schematic configuration diagram showing a steady state of the safety device according to the second embodiment.
FIG. 4 is a schematic configuration diagram showing a power failure state of the safety device according to the second embodiment.
FIG. 5 is a schematic configuration diagram showing an elevator of the present invention.
MODE FOR CARRYING OUT THE INVENTION
[0009]
　Embodiments of the present invention will be described below with reference to the drawings.
Example 1
[0010]
　First, the overall structure of the elevator of the present invention will be outlined using the schematic configuration diagram of FIG. As shown in FIG. 5, the elevator of the present invention includes a car 1, a counterweight 40, a main rope 50, a traction sheave 60, a guide rail 70, and a safety device 80.
[0011]
　The car 1 installed in the hoistway 110 of the building 100 has a plurality of guide devices (not shown), and is slidably engaged with the guide rail 70. Therefore, the car 1 is guided by the guide rail 70 to move up and down in the hoistway 110.
[0012]
　On the main rope 50, the car 1 and the counterweight 40 are suspended. The traction sheave 60 is arranged in a machine room 120 provided in the building 100. The main rope 50 is wound around the traction sheave 60. Further, a drive device (not shown) that drives and brakes the traction sheave 60 is arranged in the machine room 120. The drive device frictionally drives the main rope 50 by rotating the traction sheave 60 to raise and lower the car 1 and the counterweight 40.
[0013]
　The safety device 80 is installed separately on the upper part and the lower part of the car 1, and when the hoisting speed of the car 1 reaches an abnormal speed, the safety device 80 grips the guide rail 70 in an emergency to move the car 1 up and down. Gives braking force to.
[0014]
　Next, the safety device 80 of the first embodiment will be described by comparing the steady state and the abnormal state with reference to the schematic configuration diagrams of FIGS. 1 and 2.
[0015]
　FIG. 1 shows a main configuration of a safety device 80 installed on the upper portion of the car 1. As shown here, a battery 2 is mounted on the ceiling of the car 1, and an actuator 3 driven by the battery 2 is supported. A motor or a solenoid may be used as a power source of the actuator 3, but it is preferable to use a motor in order to reduce the size of the actuator 3.
[0016]
　A gear 4 is coupled to the rotary shaft of the actuator 3. A drive shaft 5 having teeth meshing with a gear 4 is supported on the ceiling of the car 1 so as to be vertically movable, and is urged upward by a spring 6.
[0017]
　The drive shaft 5 extends below the car 1, and one end of a V-shaped lever 7 is connected to the lower end of the drive shaft 5. The V-shaped lever 7 is a lever whose two sides have a fixed angle, and is freely supported in a rotating direction by a rotating shaft 7A provided below the car 1.
[0018]
　A linear lever 8 is provided at the bottom of the car 1, and the other end of the V-shaped lever 7 and one end of the lever 8 are connected by a link 9. As a result, the lever 8 is interlocked with the V-shaped lever 7, and the rotation direction is freely supported by the rotation shaft 8A provided at the lower portion of the car 1.
[0019]
　Furthermore, the other end of the V-shaped lever 7 is connected to the upper end of the pulling rod 10a, and the lower end thereof is connected to the wedge 11a. The pulling rod 10a passes through an emergency stop device 12a supported and fixed to the lower portion of the car 1, and the lower end portion thereof is fixed to the wedge 11a.
[0020]
　Similarly, the other end of the lever 8 is connected to the upper end of the pulling rod 10b, and the lower end thereof is connected to the wedge 11b. The pulling rod 10b passes through an emergency stop device 12b supported and fixed to the lower portion of the car 1, and the lower end portion thereof is fixed to the wedge 11b.
[0021]
　As can be understood from the above description, the urging force of the spring 6 is transmitted to the wedges 11a and 11b via the drive shaft 5, the V-shaped lever 7, the lever 8, the link 9, the pulling rods 10a and 10b, and other link devices. Therefore, the wedges 11a and 11b are always urged upward.
[0022]
　However, in the steady state shown in FIG. 1, when the actuator 3 rotates counterclockwise as indicated by the arrow, the gear 4 of the actuator 3 acts on the teeth of the drive shaft 5 and is driven against the biasing force of the spring 6. Since the shaft 5 is pushed downward, the wedges 11a and 11b and the safety devices 12a and 12b are kept disengaged.
[0023]
　Next, the operation of the safety device 80 when the ascending/descending speed of the car 1 reaches an abnormal speed will be described with reference to FIG.
[0024]
　When the abnormal speed detection device 16 installed in the machine room 120 or the like detects that the raising/lowering of the car 1 reaches an abnormal speed (for example, 1.3 times the rated speed), the power supply to the actuator 3 is stopped. , Electrically de-energize.
[0025]
　When the actuator 3 loses electricity, the force for holding the drive shaft 5 at the lower position against the spring 6 is lost, so that the drive shaft 5 is pulled up by the restoring force of the spring 6, as shown in FIG. As a result, the V-shaped lever 7 rotates clockwise about the rotation shaft 7A, and the pull-up rod 10a connected to the V-shaped lever 7 is pulled up, as a result, the wedge 11a is pulled up and the emergency stop device 12a is engaged. To meet.
[0026]
　Further, the clockwise rotation of the V-shaped lever 7 is transmitted to the lever 8 by the link 9 and rotates the lever 8 counterclockwise about the rotation shaft 8A. As a result, the pulling rod 10b is pulled upward, and as a result, the wedge 11b engages with the safety device 12b.
[0027]
　As described above, when the car 1 reaches the abnormal speed, the wedge 11 and the safety device 12 are engaged with each other, so that the safety device 80 can hold the guide rail 70, and the braking force is applied to the car 1. As a result, the car 1 is stopped.
[0028]
　On the other hand, when returning from the state of FIG. 2, power is supplied to the actuator 3, the gear 4 is rotated in the direction of the arrow in FIG. Since the locking device 12 can be brought into the non-engaged state, the grip of the guide rail 70 by the safety device 80 can be released.
[0029]
　The operation of returning from FIG. 2 to FIG. 1 will be described in detail. The V-shaped lever 7 is rotated counterclockwise about the rotation shaft 7A, and the pull-up rod 10a connected to the V-shaped lever 7 is pushed downward, so that the wedge 11a is released from the safety device 12a. Further, the counterclockwise rotation of the V-shaped lever 7 is transmitted to the lever 8 by the link 9 and rotates the lever 8 clockwise around the rotation shaft 8A. Therefore, the pull-up rod 10b is pushed down, the wedge 11b is released from the safety device 12b, and the state shown in FIG. 1 is again obtained.
[0030]
　In the configuration of this embodiment, since the actuator 3 includes the battery 2, the actuator 3 can be operated even when the commercial power source is in a power failure state, and thus the stopped car 1 can be moved. It can be returned to and can be rescued by moving to the nearest floor.
[0031]
　The above-mentioned embodiment shows a principle configuration, and the present invention is not limited to the configuration shown in the drawings. In any case, a spring 6 is provided with a link device that is biased in a raised state so as to engage the wedges 11a and 11b with the emergency stop devices 12a and 12b. When the wedges 11a and 11b are held in the disengaged state from the stoppers 12a and 12b, and when the abnormal speed detection device 16 detects an abnormal speed of the car 1, the actuator 3 is de-energized and the spring 6 connects the link devices. The wedges 11a and 11b are pulled up so as to be engaged with the safety devices 12a and 12b via.
[0032]
　According to such a configuration, since the wedges 11a and 11b are biased in the pulling direction by the spring 6, it is possible to operate the wedges 11a and 11b by using the spring force with a simple configuration. Further, since it is not necessary to engage the emergency stop devices 12a and 12b and the wedges 11a and 11b via the speed governor rope as in the conventional art, on-site installation work using the speed governor rope becomes unnecessary. , The work can be simplified.
[0033]
　In this embodiment, the actuator 3 is installed on the upper part of the car 1, and the battery 2 for driving the actuator 3 at the time of power failure is installed on the upper part of the car 1. With such a configuration, even if the actuator 3 or the battery 2 fails, access to the upper portion of the car 1 facilitates restoration or replacement of parts by a worker, and reliability can be improved.
[0034]
　According to the elevator safety device of the present embodiment described above, since the wedge is urged in the pull-up direction by the spring, it is possible to operate the wedge using the spring force with a simple configuration. .. In addition, since it is not necessary to engage the emergency stop device and the wedge via the speed governor rope as in the past, on-site installation work using the speed governor rope is not required and the work is simplified. can do.
Example 2
[0035]
　Next, a steady state and an abnormal state of the elevator safety device 80 according to the second embodiment will be described with reference to the schematic configuration diagrams of FIGS. 3 and 4.
[0036]
　FIG. 3 shows the main configuration of the safety device 80 installed in the lower part of the car 1. As shown here, in this embodiment, the actuator 3, the gear 4, and the battery 2 are arranged in the lower part of the car 1. Here is an example. The other configurations are similar to those of the above-described first embodiment, and thus the description thereof will be omitted.
[0037]
　By arranging the actuator 3, the gear 4 and the battery 2 in the lower part of the car 1 as described above, the height of the upper side of the car 1 can be reduced and the overhead height of the hoistway can be shortened.
[0038]
　It should be noted that these inventions are not limited to the above-described embodiments, but include various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Further, part of the configuration of the embodiment can be replaced with the configuration of another embodiment.
Explanation of symbols
[0039]
1 car, 2 battery, 3 actuator, 4 gear, 5 drive shaft, 6 spring, 7 V-shaped lever, 8 lever, 7A, 8A rotating shaft, 9 link, 10, 10a, 10b pull-up rod, 11, 11a, 11b Wedge, 12, 12a, 12b emergency stop device, 16 abnormal speed detection device, 40 counterweight, 50 main rope, 60 traction sheave, 70 guide rail, 80 safety device, 100 building, 110 hoistway,
120 machine room
claims
[Claim 1]
　A safety device for engaging the wedge and the safety device to hold the guide rail and stopping the car when the vertical movement of the car reaches
　an abnormal speed, which is an abnormality that detects the abnormal speed of the car. a speed detecting device,
　a drive shaft interlocked with the wedge,
　the actuator providing a driving force to the drive shaft,
　and a spring providing a biasing force to said drive shaft
　includes a
　case the car is less than abnormal speed Keeps the wedge and the safety gear disengaged against the biasing force of the spring by the driving force of the
　actuator, and loses the actuator when the car reaches an abnormal speed. A safety device for an elevator, characterized in that the wedge is engaged with the safety device by an urging force applied by the spring to hold the guide rail.
[Claim 2]
　When the car reaches the abnormal speed, a elevator safety device for stopping the cage is engaged with the safety device by pulling wedges,
　raising to engage the wedge to the safety gear by a spring A link device biased in the direction is provided, and in a
　steady state, the actuator pulls down the emergency stop device from the safety device to the disengaged state to hold the wedge,
　while the car reaches an abnormal speed. At this time, the actuator is de-energized, and the spring pulls up the wedge via the link device to engage the safety device with the safety device.
[Claim 3]
　The elevator safety device according to claim 1 or 2, further comprising a battery for driving the actuator.
[Claim 4]
　The elevator safety device according to claim 3, wherein the actuator and the battery are installed in an upper portion of the car.
[Claim 5]
　The elevator safety device according to claim 3, wherein the actuator and the battery are installed in a lower portion of the car.
[Claim 6]
　A car, a
　counterweight installed in the hoistway,
　a main rope suspending the car and the counterweight,
　a traction sheave wound around the main rope, and
　a drive device for braking the traction sheave. ,
　a guide rail for guiding the vertical movement of the car,
　the elevator, characterized in that it comprises a safety device according to claim 1 or claim 2.