JP2013193877A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device capable of surely pulling up a connecting part of a pulling-up means, when a car descends at abnormal acceleration.SOLUTION: An elevator device includes a speed regulator pulley 4 of a speed regulator and a tension pulley 5 arranged in an opposed position of the speed regulator pulley 4, relatively pulls up the connecting part 7a to a car 3 by a difference between a descending speed of the car 3 and a moving speed of a speed regulator rope 6 when the car 3 descends at the abnormal acceleration, and operates an emergency stopping device 9 by a pulling-up part 7b in response to this. The elevator device includes a timing belt pulley 10 arranged on the same axis with the tension pulley 5, a timing belt tension pulley 11 arranged in an opposed position of the timing belt pulley 10, a timing belt 12 hooked in an endless shape between these timing belt pulley 10 and timing belt tension pulley 11, and a connecting body 13 for connecting the speed regulator rope 6 and the timing belt 12.

Description

  The present invention relates to an elevator apparatus provided with a speed governor that makes an emergency stop of a car when the car descends beyond a normal acceleration.

  In general, an elevator apparatus is provided with a governor that constantly monitors the ascending / descending speed of a car and emergency-stops the car when the car falls into a predetermined overspeed state.

  Specifically, the governor is a hoist that drives the car when the car's lifting speed exceeds the rated speed and reaches the first overspeed (usually not exceeding 1.3 times the rated speed). The car is safely stopped by shutting off the power source and the control device for controlling the hoisting machine.

  The governor was installed in the car when the car descending speed exceeded the first overspeed for some reason and reached the second overspeed (usually not exceeding 1.4 times the rated speed). The emergency stop device is operated to mechanically stop the car.

  Conventionally, as this type, a governor pulley of the governor, a tension pulley disposed at a position opposite to the governor pulley, a governor rope that is endlessly hung between these pulleys, The connecting portion is fixed to the governor rope, and has a lifting means for operating an emergency stop device mounted on the cage by the lifting portion. 2 When the overspeed is reached, the connection of the governor rope is pulled up relative to the car by stopping the movement of the governor rope by the governor rope gripping mechanism of the governor. In response to this, there are some which operate the emergency stop device by the lifting portion to emergency stop the car.

  According to this configuration, since the governor rope gripping mechanism operates after the second overspeed is reached, if an operation delay occurs in the governor rope gripping mechanism, the number of cars increases before the emergency stop device is operated. For this reason, when the cage descends at an abnormal acceleration by increasing the rotational inertial mass of at least one of the governor pulley and the tension pulley (see, for example, Patent Document 1), The speed governor is caused by the friction force between the speed governor rope and the speed governor pulley or the pulley on the side where the rotational inertia mass of the tension pulley is increased, causing a difference in the descent speed of the car and the speed of the speed governor rope. It is conceivable that the connecting portion fixed to the rope is lifted relatively to the car, and the emergency stop device is operated by the lifting portion in response to this to stop the car in an emergency.

JP-A-5-213556

  However, in the above-mentioned conventional one, the governor rope is simply hung between the governor pulley and the tension pulley. When descending, the governor rope slides on the pulley with the increased rotational inertial mass, so that there is no sufficient difference between the descending speed of the car and the speed of movement of the governor rope. There was a risk that the safety device would not operate due to the fact that it was not pulled up.

  The present invention was made from the actual situation in the above-described prior art, and an object thereof is to provide an elevator apparatus that can reliably lift the connecting portion of the lifting means in response to the car descending due to abnormal acceleration. is there.

  In order to achieve the above object, the present invention provides a governor pulley of a governor disposed in a hoistway, a tension pulley disposed at a position opposite to the governor pulley, and an endless arrangement between these pulleys. And a connecting portion fixed to the governor rope and a lifting means for operating an emergency stop device mounted on the cage by the lifting portion. When the vehicle descends at an acceleration, the connecting part is pulled up relative to the car due to the difference between the lowering speed of the car and the moving speed of the governor rope. In the elevator apparatus to be operated, a timing belt pulley that rotates on the same axis as the tension pulley, and a timing belt disposed at a position opposite to the timing belt pulley. A belt tension pulley, a timing belt that is endlessly hung between the timing belt pulley and the timing belt tension pulley, and a connecting body that connects the governor rope and the timing belt are provided. It is characterized by that.

  According to the present invention, it is possible to reliably pull up the connecting portion of the lifting means according to the fact that the car has been lowered due to the abnormal acceleration. It is possible to improve safety.

It is a front view which shows one Example at the time of normal raising / lowering of the elevator apparatus which concerns on this invention. It is a front view which shows one Example at the time of the overspeed fall of the elevator apparatus which concerns on this invention.

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

  As shown in FIG. 1, the elevator apparatus of the present embodiment is suspended from a hoistway 1 by a main rope 2, and a car 3 that moves up and down the hoistway 1 and a governor arranged at the top of the hoistway 1. The speed governor pulley 4, the tension pulley 5 below the hoistway 1 and disposed at a position facing the speed governor pulley 4, and endlessly hooked between the speed governor pulley 4 and the tension pulley 5. The speed governor rope 6 to be connected, the connecting portion 7a is fixed to the speed governor rope 6, and the lifting means 7 for operating the emergency stop device 9 mounted on the car 3 by the lifting portion 7b, the tension pulley 5; A timing belt provided on the same shaft via the shaft 8 and fastened to the tension pulley 5 so as to rotate in the same manner as the tension pulley 5, the additional rotary inertia mass body 14, and the hoistway 1. Pulley A timing belt tension pulley 11 disposed at a position opposite to the timing belt 10, a timing belt 12 hung endlessly between the timing belt pulley 10 and the timing belt tension pulley 11, and a governor rope 6; A connecting body 13 that connects the timing belt 12 is provided.

  In this embodiment, when the car 3 moves up and down during normal operation, the speed governor rope 6 connected to the car 3 via the connecting portion 7a and the speed governor rope 6 connected to the speed governor rope 6 via the connecting body 13 are connected. The timing belts 12 move in synchronization with each other.

  At this time, the timing belt 12 is wound around and driven by the timing belt pulley 10 provided on the same shaft as the tension pulley 5, and at this time, the additional rotary inertia mass body 14 also rotates in synchronization with the governor rope. Although the rotational inertia mass of the tension pulley 5 around which the belt 6 is wound is large, when the car 3 is lifted and lowered at the rated acceleration, the governor rope 6 and the timing belt 12 are moved according to the lifting and lowering of the car 3. It is set to a rotational inertial mass that can move synchronously.

  By the way, if for some reason, the speed governor detects that the ascending / descending speed of the car 3 exceeds the rated speed and has reached the first overspeed, the power source of the hoisting machine (not shown) that drives the car 3 and the hoisting machine The car 3 is stopped by shutting off the power sources of the control devices for controlling the car.

  Since the structure of the governor that detects that the car 3 has reached the first overspeed (usually not exceeding 1.3 times the rated speed) is well known, a detailed description will be given here. Omitted.

  On the other hand, for example, when the main rope 2 is interrupted and an overspeed occurs when the car 3 is freely dropped, the car 3 is lowered by the rotational inertia mass of the tension pulley 5, the timing belt pulley 10, and the additional rotary inertia mass body 14. There is a difference between the speed and the moving speed of the governor rope 6.

  In particular, in this embodiment, the timing belt 12 is wound around the pulley 10 for the timing belt provided on the same axis as the tension pulley 5 and driven, thereby adding to the frictional force between the governor rope 6 and the tension pulley 5. The governor rope 6 was prevented from sliding on the tension pulley 5 by the shearing force of the teeth of the timing belt pulley 10 and the timing belt 12.

  Then, due to the generated speed difference, as shown in FIG. 2, the connecting portion 7a fixed to the governor rope 6 is pulled up relatively with respect to the car 3, and the emergency stop device is lifted by the lifting portion 7b accordingly. 9 is operated and the car 3 is brought to an emergency stop.

  According to the present embodiment, the connecting portion 7a of the lifting means 7 can be reliably lifted in response to the car 3 being lowered at an abnormal overspeed, and thus the emergency stop device 9 can be accurately operated when necessary. The car 3 can be brought to an emergency stop, and safety can be improved.

  Further, according to the present embodiment, the emergency stop device 9 can be operated in accordance with the abnormal overspeed of the car 3 even before the second overspeed is reached. For example, the present invention can also be applied as a device for an inner car of a double deck elevator that can drive two inner cars installed inside the double deck elevator.

1 hoistway 2 main rope 3 car 4 governor pulley 5 tension pulley 6 governor rope 7 lifting means 7a connecting portion 7b lifting portion 8 shaft 9 emergency stop device 10 timing belt pulley 11 timing belt tension pulley 12 timing belt 13 Connecting body 14 Additional rotating inertial mass body

Claims (1)

A governor pulley of the governor disposed in the hoistway, a tension pulley disposed at a position opposite to the governor pulley, a governor rope that is endlessly hung between these pulleys, and a connecting portion Is fixed to the governor rope, and has a lifting means for operating an emergency stop device mounted on the car at the lifting portion, and when the car descends with an abnormal acceleration, the lowering speed of the car and the In the elevator apparatus in which the connecting part is pulled up relative to the car due to a difference with the moving speed of the governor rope, and the emergency stop device is operated by the lifting part according to this,
Timing belt pulley provided to rotate on the same axis as the tension pulley, timing belt tension pulley disposed at a position opposite to the timing belt pulley, timing belt pulley and timing belt tension An elevator apparatus comprising: a timing belt that is endlessly hung between pulleys; and a connecting body that connects the governor rope and the timing belt.