JP2012131625A - Buffer device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a buffer device of an elevator capable of buffering an elevating body abnormally falling from an upper part of a hoistway at an early stage.SOLUTION: In the buffer device of the elevator buffering an elevating body (3) vertically suspended by a lope 5 and elevated and lowered in the hoistway 2, the buffer device of the elevator includes a detecting means (6) detecting the position and abnormality of the elevating body, a buffer housing space 8 positioned in an intermediate height position of the hoistway and formed in a region except a vertically projected surface of the elevating body, a movement buffer 9 disposed in the buffer housing space and a moving means 10 moving the movement buffer from the buffer housing space to the vertically projected surface of the elevating body. When the detecting means detects abnormality in the state that the elevating body is positioned in an upper part of the hoistway, the movement buffer is moved from the buffer housing space to the vertically projected surface of the elevating body via the moving means to buffer the elevating body in the intermediate position of the hoistway.

Description

  The present invention relates to an elevator buffer device that buffers abnormal lowering of an elevating body.

  Generally, in a rope type elevator in which a car is suspended by a plurality of ropes, an emergency brake device is provided as means for preventing the car from falling when the rope is cut. This emergency brake system presses the brake element against the guide rail via the governor rope gripping operation of the governor before the descent speed of the car exceeds 1.4 times the rated speed, and brakes the car by the friction force. Is. In addition, a buffer is provided at the bottom of the hoistway so that the car does not collide with the bottom. The stroke of this buffer is determined according to the rated speed of the elevator.

  However, the buffer provided at the bottom of the hoistway is a situation where the car starts to descend abnormally below the hoistway and reaches the pit before the descent speed exceeds 1.4 times the rated speed, Alternatively, the vehicle is provided with a buffering capacity that can mitigate the impact in a situation where the descent of the car cannot be fully decelerated even if the emergency brake device is operated. Therefore, for example, if for some reason the car starts to descend abnormally above the hoistway and the emergency brake device does not operate, it is impossible to absorb the impact with the buffer at the bottom of the hoistway. , Couldn't prevent a major accident.

  The present invention has been made from the above-described prior art, and an object of the present invention is to provide an elevator buffer device capable of buffering an elevator body that is abnormally lowered from above a hoistway at an early stage.

  In order to achieve the above object, the present invention provides an elevator buffer device that cushions a lifting body that is suspended by a rope and moves up and down a hoistway, a detection means that detects a position of the lifting body and an abnormality, and the lifting A buffer storage space formed outside the vertical projection plane of the lifting body, a moving buffer disposed in the buffer storage space, and the moving buffer from the buffer storage space; And moving means for moving within the vertical projection plane of the body.

  In the present invention configured as above, the moving buffer is normally located in a buffer storage space formed outside the vertical projection surface of the lifting body and does not hinder the lifting body from moving up and down. However, when the detecting means detects the abnormality while the lifting body is located above the hoistway, the moving buffer moves from the buffer storage space to the vertical projection plane of the lifting body via the moving means, and the lifting body Can be buffered at an intermediate position of the hoistway. Thereby, the lifting body that has abnormally lowered from above the hoistway can be buffered at an early stage.

  According to the present invention, even when the emergency brake device does not operate normally, the lifting body that has abnormally lowered from above the hoistway can be buffered at an early stage to prevent a major accident.

It is a schematic block diagram which shows one Example of the buffer apparatus of the elevator which concerns on this invention. It is a schematic block diagram which shows the state which moved the movement buffer to the buffer position.

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

  The elevator has a hoistway 2 formed in the building 1 and an elevating body that moves up and down the hoistway 2, that is, a car 3 and a car 3, and an intermediate position is wound around the hoisting machine 4. A rope 5 and a control device 6 for overall control of the elevator are provided.

  The buffer device according to this embodiment includes a normal buffer 7 disposed at the lower part of the hoistway 2 and a buffer storage that is located at an intermediate height position of the hoistway 2 and is formed outside the vertical projection plane of the car 3. A space 8, a moving buffer 9 disposed in the buffer storage space 8, and moving means 10 for moving the moving buffer 9 from the buffer storage space 8 into the vertical projection plane of the car 3 are provided. In addition, the position of the raising / lowering body mentioned above and the detection means which detects abnormality comprise the control apparatus 6, for example.

  In this embodiment, normally, the moving buffer 9 is located in the buffer storage space 8 formed outside the vertical projection plane of the car 3 and does not hinder the raising and lowering of the car 3. However, when the control device 6 detects an abnormality, for example, the disconnection of the rope 5 and the abnormality of the emergency brake device (not shown) when the car 3 is positioned above the hoistway 2, the control device 6 moves through the moving means 10. The buffer 9 is moved from the buffer storage space 8 into the vertical projection plane of the car 3 so that the car 3 can be buffered at an intermediate position of the hoistway 2. Note that the abnormal lowering of the car 3 that occurs below the buffer storage space 8 corresponds to the normal buffer 7 disposed in the lower part of the hoistway 2 as in the conventional case.

  According to this embodiment, even when the emergency brake device does not operate normally, the car 3 that has abnormally lowered from above the hoistway 2 can be buffered at an early stage to prevent a major accident.

  In the above-described embodiment, the moving buffer 9 is arranged at one position in the middle height position of the hoistway 2, but the present invention is not limited to this, and is arranged at a plurality of places according to the hoisting distance of the hoistway 2. You can also

DESCRIPTION OF SYMBOLS 1 Building 2 Hoistway 3 Car cage 4 Hoisting machine 5 Rope 6 Control device (detection means)
7 normal buffer 8 buffer storage space 9 moving buffer 10 moving means

Claims (1)

In an elevator buffer device that buffers a lifting body that is suspended by a rope and moves up and down a hoistway,
The position of the lifting body and detection means for detecting an abnormality, the buffer storage space formed at the intermediate height position of the hoistway and formed outside the vertical projection plane of the lifting body, and the buffer storage space And a moving means for moving the moving buffer from the buffer storage space into a vertical projection plane of the lifting / lowering body.

Images