JP2013112432A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device that has a cage suspended in a hoistway by a main rope, and can shorten a time required for generating a braking force after the detection of an abnormality without causing the occurrence of a malfunction of an emergency stop device.SOLUTION: The elevator device includes: a wedge 20 as a braking member for braking a cage 3; a governor 6 which mechanically detects the abnormality of the elevator; a pull-up mechanism 19 as a mechanical transmission means of mechanically transmitting an operating force to the wedge 20 based on detection by the governor 6; a switch 11 which electrically detects the abnormality of the elevator and serves as an output section outputting an operation signal when the abnormality is detected; and an actuator 21 which receives the operation signal from the switch 11.

Description

The present invention relates to an elevator apparatus in which a car is suspended in a hoistway by a main rope.

In a conventional elevator apparatus, a speed governor is used to operate an emergency stop device mounted on a car. Japanese Patent Application Laid-Open No. 2001-80840 discloses a speed governor that detects an abnormality in the ascending / descending speed of a car and an emergency stop device that prevents a car from falling by pressing a wedge against a car guide rail that guides the car. . A governor rope that moves in synchronization with the raising and lowering of the car is wound around the sheave of the governor. The car is equipped with a safety link connected to the governor rope and interlocking with the wedge of the safety device. In the governor, when an abnormal speed of the car is detected, the governor rope is restrained. The safety link is operated by the restraint of the governor rope, and the wedge is pressed against the car guide rail. The car is prevented from falling by the braking force generated by this pressing.

Japanese Patent Laid-Open No. 2001-80840

However, in such an elevator apparatus, the governor rope is restrained and the operation of the safety link is interposed between the time when a speed abnormality of the car is detected by the speed governor and the time when the braking force of the wedge is generated. Due to the delay in the restraining operation of the governor rope at the speed machine, the expansion and contraction of the governor rope, the delay in the operation of the safety link, etc., it takes time from the detection of the speed abnormality of the car to the generation of the braking force. In addition, there is a method to improve a part of this problem by setting the wedge of the emergency stop device close to the guide rail in a normal state, but there is a problem that the emergency stop device is likely to malfunction.

The present invention has been made to solve the above-described problems, and provides an elevator apparatus that can shorten the time taken from detection of an abnormality to generation of braking force without causing malfunction of the emergency stop device. The purpose is to obtain.

An elevator apparatus according to the present invention includes a car guide rail that guides the raising and lowering of a car, a car guide rail that is mounted on the car and that brakes the car by abutting the car guide rail, Mechanical detection means for mechanically detecting an abnormality in the elevator, mechanical transmission means for mechanically transmitting an operating force to the braking member based on the mechanical detection means, and an abnormality in the elevator is detected electrically. An output unit that outputs an operation signal at the time of detection and an actuator unit that receives an operation signal from the output unit are provided. When the operation signal is input to the actuator unit, the braking member is operated by a mechanical transmission unit. Before, the brake member is displaced by the actuator portion so as to reduce the gap between the brake member and the car guide rail.

The present invention includes an output unit that electrically detects an elevator abnormality and outputs an operation signal when the abnormality is detected, and an actuator unit to which an operation signal is input from the output unit, and the operation signal is input to the actuator unit. Then, before the braking member is operated by the mechanical detection means, the braking member is displaced so as to reduce the gap between the braking member and the car guide rail, so that the emergency stop device does not malfunction. It is possible to realize an elevator apparatus that can shorten the time required from the detection of an abnormality to the generation of a braking force.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows typically the elevator apparatus in Embodiment 1 of this invention. It is a front view which shows the safety device of FIG. 1 in Embodiment 1 of this invention. It is a front view which shows the state at the time of the action | operation of the safety device of FIG. 2 in Embodiment 1 of this invention.

Embodiment 1 FIG.
1 is a block diagram schematically 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. A hoisting machine (not shown) for raising and lowering the car 3 and a counterweight (not shown) is disposed at the upper end of the hoistway 1. A main rope 4 is wound around the drive sheave of the hoisting machine. The car 3 and the counterweight are suspended in the hoistway 1 by the main rope 4. A pair of safety devices 5 serving as braking means are mounted on the car 3 so as to face the car guide rails 2. Each emergency stop device 5 is arranged in the lower part of the car 3. The car 3 is braked by the operation of each emergency stop device 5.
Further, a speed governor 6 that is a car speed detecting means for detecting the raising / lowering speed of the car 3 is arranged at the upper end of the hoistway 1. The governor 6 includes a governor body 7 and a governor sheave 8 that can rotate with respect to the governor body 7. A rotatable tensioning wheel 9 is disposed at the lower end of the hoistway 1. A governor rope 10 connected to the car 3 is wound between the governor sheave 8 and the tension wheel 9. The connecting portion with the car 3 is reciprocated in the vertical direction together with the car 3. As a result, the governor sheave 8 and the tension wheel 9 are rotated at a speed corresponding to the ascending / descending speed of the car 3.

The speed governor 6 operates the brake device of the hoisting machine when the ascending / descending speed of the car 3 reaches a preset first overspeed. The governor 6 has an output unit that outputs an operation signal to the emergency stop device 5 when the descending speed of the car 3 becomes the second overspeed (set overspeed) higher than the first overspeed. A switch unit 11 is provided. The switch portion 11 has a contact portion 16 that is mechanically opened and closed by an overspeed lever that is displaced according to the centrifugal force of the rotating governor sheave 8. The contact portion 16 is electrically connected to a battery 12 that is an uninterruptible power supply that can supply power even in the event of a power failure, and a control panel 13 that controls the operation of the elevator by a power cable 14 and a connection cable 15, respectively.
A control cable (moving cable) is connected between the car 3 and the control panel 13. The control cable includes an emergency stop wiring 17 electrically connected between the control panel 13 and each emergency stop device 5 together with a plurality of power lines and signal lines. The electric power from the battery 12 is supplied to each emergency stop device 5 through the power supply cable 14, the switch unit 11, the connection cable 15, the power supply circuit in the control panel 13 and the emergency stop wiring 17 when the contact portion 16 is closed. The The transmission means includes a connection cable 15, a power supply circuit in the control panel 13, and an emergency stop wiring 17.

2 is a front view showing the emergency stop device 5 of FIG. 1, and FIG. 3 is a front view showing the emergency stop device 5 in operation of FIG. In the figure, a support member 18 is fixed to the lower portion of the car 3. The emergency stop device 5 is supported by a support member 18. Further, at the lower part of the car 3, a lifting mechanism 19 is provided, one side of which is connected to a part of the governor rope 10 and transmits the pulling force of the governor rope 10. Each emergency stop device 5 has a wedge 20 as a pair of braking members that can be brought into and out of contact with the car guide rail 2, and a lifting mechanism 19 that is connected to the wedge 20 and displaces the wedge 20 with respect to the car 3. An actuator portion 21 that displaces the wedge 20 with respect to the car 3, and a pair of guide portions 22 that are fixed to the support member 18 and that guide the wedge 20 displaced by the actuator portion 21 in a direction in contact with the car guide rail 2. And have. The pair of wedges 20 and the pair of guide portions 22 are disposed symmetrically on both sides of the car guide rail 2. The actuator unit 21 is disposed below the wedge 20 on the side where the lifting mechanism 19 is provided.
The guide portion 22 has an inclined surface 23 that is inclined with respect to the car guide rail 2 so that the distance from the car guide rail 2 is reduced upward. The wedge 20 is displaced along the inclined surface 23. The actuator part 21 has a movable part 24 that can be expanded and contracted to raise the wedge 20 to a predetermined position on the upper guide part 21 side.
Energization of the actuator unit 21 is performed from the battery 12 (see FIG. 1) by closing the contact unit 16 (see FIG. 1), so that the movable unit 24 extends upward and pushes up the wedge 20. When the energization of the actuator unit 21 is interrupted by opening the contact unit 16 (see FIG. 1), the movable unit 24 contracts and returns to the original position. That is, when the actuator portion 21 is energized, the pair of wedges 19 are displaced upward with respect to the car 3 due to the movable portion 24 extending upward, and rise to a predetermined position on the upper guide portion 21 side. , Stop at a predetermined position. Here, the predetermined position is a position where the wedge 20 approaches or comes into contact with the inclined surface 23, but the contact between the wedge 20 and the inclined surface 23 is a slight contact and is not a strong contact. .

Next, the operation will be described. During normal operation, the contact portion 16 is open. As a result, no power is supplied from the battery 12 to the actuator unit 21. The wedge 20 is separated from the car guide rail 2 without being displaced (FIG. 1).
For example, when the speed of the car 3 increases due to cutting of the main rope 4 and the first overspeed is reached, the brake device of the hoisting machine is activated. Even after the brake device of the hoisting machine is actuated, when the speed of the car 3 further increases and becomes the second overspeed, the contact portion 16 is closed. Thereby, energization to the actuator part 21 of each emergency stop device 5 is started, and the wedge 20 is displaced upward with respect to the car 3 by the urging of the movable part 24. At this time, the wedge 20 is displaced along the inclined surface 23 while being in contact with the inclined surface 23 of the guide portion 22. When the wedge 20 is displaced to a predetermined position so as to reduce the gap between the wedge 20 and the car guide rail 2, the wedge 20 stops at that position. At this time, the wedge 20 and the car guide rail 2 are in a state of being in close proximity or slightly contacting each other (prepared state), but each emergency stop device 5 is not operating.

The speed of the car 3 is temporarily increased to the second overspeed, and after the wedge 20 is displaced upward with respect to the car 3 by the urging of the movable portion 24, the speed of the car 3 is increased to the second speed for some reason. When the speed drops below the overspeed and the speed governor 6 does not operate, the energization to the actuator unit 21 is cut off, and the movable unit 24 returns to the original position. As a result, the wedge 20 is pushed down by the pulling mechanism 19 and returns to the original position, so that a malfunction is not likely to occur.

On the other hand, when the speed of the car 3 reaches the second overspeed, the governor 6 operates and locks the governor rope 10. When the governor rope 10 is locked, the wedge 20 is pulled up by the pulling mechanism 19 connected to the governor rope and pressed against the car guide rail 2. Here, before the wedge 20 is pulled up to the lifting mechanism 19, the wedge 20 is pulled up to a predetermined position so as to reduce the gap with the car guide rail 2.

That is, since the wedge 20 and the car guide rail 2 are in a close state (prepared state), the distance (stroke) necessary for lifting the wedge 20 is changed from the normal position to the predetermined position. It has been reduced by the amount. Here, when the wedge 20 is further pulled up by the lifting mechanism 19, the wedge 20 is displaced from the predetermined position where it has already been lifted. Therefore, the lifting mechanism 19 only needs to be displaced by a smaller distance than in the prior art. Can be brought into contact with the car guide rail 2. As a result, the wedge 20 is further displaced upward and is engaged between the car guide rail 2 and the guide portion 22, thereby generating a large frictional force between the car guide rail 2 and the wedge 20. The brake is applied (FIG. 3). When releasing the braking of the car 3, the car 3 is raised without energizing the actuator part 21 by opening the contact part 16. As a result, the wedge 20 is displaced downward and separated from the car guide rail 2.

Since it comprised as mentioned above, it is mounted in the cage | basket | car 3 which guides raising / lowering of the cage | basket | car 3 in the hoistway 1, the cage | basket 3 and the cage | basket | car 3, and the cage | basket | car 3 by contact | abutting to the cage-guide rail 2 A wedge 20 as a braking member that brakes the elevator, a speed governor 6 that mechanically detects an abnormality in the elevator, and a mechanical transmission means that mechanically transmits an operating force to the wedge 20 based on the detection of the speed governor 6 A lifting mechanism 19, a switch unit 11 that is an output unit that electrically detects an abnormality of the elevator and outputs an operation signal when the abnormality is detected, and an actuator unit 21 to which an operation signal from the switch unit 11 is input, When the actuation signal is input to the actuator unit 21, the wedge 20 is actuated so as to reduce the gap between the wedge 20 and the car guide rail 2 before the wedge 20 is operated by the lifting mechanism 19. By being displaced by the part 21, it is possible to provide an elevator apparatus capable of very without causing a malfunction of the locking device, to reduce the time until the generation of the braking force from the abnormality detection.

In the emergency stop device 5 of the present application, the wedge 20 is pulled up by the lifting mechanism 19 to generate a braking force, which has the same configuration as the conventional one. That is, the actuator unit 21 receives an operation signal and displaces the wedge 20 to reduce the gap between the wedge 20 and the car guide rail 2 and provide a ready state. No action is provided for biting between the part 22 and the guide rail 2.

In addition, if the operation signal is not output from the switch unit 11 even though the car 3 has reached the second overspeed, the actuator unit 21 does not operate, and thus the preparation state cannot be provided. However, if the speed governor 6 is operating normally, the pulling mechanism 19 does not affect the conventional operation of lifting the wedge 20. With the configuration described above, an elevator in which the wedge 20 is braked by the operating force from the pulling mechanism 19 when an abnormality is detected by the speed governor 6 regardless of whether or not an operation signal is input to the actuator unit 21. An apparatus can be provided.

  1 hoistway, 2 guide rails, 3 cages, 4 main ropes, 5 emergency stop device, 6 governor, 7 governor body, 8 governor sheave, 9 tensioning vehicle, 10 governor rope, 11 switch, 12 battery , 13 Control panel, 14 Power cable, 15 Connection cable, 16 Contact part, 17 Power supply circuit and emergency stop wiring, 18 Support member, 19 Lifting mechanism, 20 Wedge, 21 Actuator, 22 Guide part, 23 Inclined surface, 24 movable parts, 25

  The present invention relates to an elevator apparatus in which a car is suspended in a hoistway by a main rope.

Claims (3)

Whether it is raised or lowered in the hoistway,
A car guide rail for guiding the raising and lowering of the car,
A braking member mounted on the car and braking the car by contacting the car guide rail;
Abnormality detecting means for mechanically detecting an abnormality of the elevator, mechanical transmission means for mechanically transmitting an operating force to the braking member based on detection of the abnormality detecting means,
An output unit that electrically detects an elevator abnormality and outputs an operation signal when the abnormality is detected;
An actuator unit to which an operation signal from the output unit is input,
When the operation signal is input to the actuator unit, the brake member is moved to reduce the gap between the brake member and the car guide rail before the brake member is operated by the mechanical transmission means. An elevator apparatus that is displaced by an actuator unit. Regardless of whether or not the operation signal is input to the actuator unit, when an abnormality is detected by the mechanical detection unit, the braking member is braked by an operation force from the mechanical detection unit. The elevator apparatus according to claim 1. 3. The actuator according to claim 1, wherein the actuator unit includes a movable part that can be expanded and contracted to raise the braking member to a predetermined position when the operation signal is input. 4. Elevator device.

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