JP2009263015A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device allowing installation of a speed detection means on a governor without enlarging a hoistway. <P>SOLUTION: A tension pulley 13 is provided such that it becomes a lower side than a position where a car 8 is contacted with a shock absorber 30 provided on a pit 50, and a U shape bracket 20 having one piece mounted to a bracket 19 provided on a fixed shaft 18 of the tension pulley 13 and the other piece straddling an upper side of the tension pulley 13 and positioned at an opposite projection side of the fixed shaft 18 is provided. Whereas, on the tension pulley 13, a connection body 22 provided with a rotation shaft 24 projected to an opposite fixed shaft side is provided, and further, on the other piece of the U shape bracket 20, an encoder 16 for detecting rotation of the rotation shaft 24 and detecting a position or a speed of the car is provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention particularly relates to an elevator apparatus having means for detecting the position or speed of a car.

  In a conventional elevator apparatus, there is provided a means for detecting the position or speed of a car via a roller brought into contact with the governor pulley (see, for example, Patent Document 1), or on the same axis as the governor pulley. Some have a means for detecting the position or speed of the car (for example, see Patent Document 2).

JP-A-6-144734 Japanese Utility Model Publication No. 61-154267

  In recent years, so-called machine room-less elevators without a machine room have increased. In this machine room-less elevator, the size of the hoistway is suppressed as much as possible and the hoistway is narrowed as much as possible with respect to the outside size of the car. And in a machine room-less elevator, it is common to arrange a governor at a position that passes by a car in a hoistway.

  For this reason, when the speed governor is provided with speed detection means as in the prior art, the hoistway is narrow, and there may be a case where there is not enough clearance between the elevator and other tower equipment. Yes, we had to widen the hoistway.

  The objective of this invention is providing the elevator apparatus which can provide a speed detection means in a speed governor, without making a hoistway wide.

  In order to achieve the above-mentioned purpose, an endless governor rope that is connected to an emergency stop device mounted on the car, is moved up and down in the hoistway, and moves along with the raising and lowering of the car, and the governor rope A tension pulley that applies tension, a fixed shaft that supports the tension pulley through a bearing, a weight that is attached to the protruding side of the fixed shaft, and a speed control rope that grips the governor rope when the car exceeds the specified speed. In an elevator apparatus equipped with a speed governor for operating a stopping device, the tension pulley is provided below the position where the car contacts the shock absorber provided in the pit, and is provided on the fixed shaft of the tension pulley. One piece is attached to the bracket, and the other piece extends over the tension pulley and is provided with a U-shaped bracket located on the opposite side of the fixed shaft. To Li, a connecting shaft having a rotating shaft protruding in opposite to the fixed shaft side is provided, further, the other piece of the U-shaped bracket comprises an encoder for detecting the position or speed of the car by detecting the rotation of the rotating shaft.

  The tension pulley is provided so that the cage is positioned below the shock absorber provided in the pit, and one piece is attached to the bracket provided on the fixed shaft of the tension pulley, and the other piece is located above the tension pulley. A U-shaped bracket located on the anti-projection side of the straddling fixed shaft is provided. On the other hand, the tension pulley is provided with a connecting shaft provided with a rotating shaft that protrudes on the anti-fixed shaft side. Since the encoder that detects the rotation or rotation of the shaft to detect the position or speed of the car is provided, it is possible to solve problems such as widening the hoistway without causing interference with other devices in the hoistway. .

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall configuration diagram showing an elevator apparatus according to an embodiment of the present invention, FIG. 2 is a vertical sectional view of a hoistway showing the positional relationship between a governor and a car in FIG. 1, and FIG. 3 is a detailed view of a tension pulley portion. (A cross section in FIG. 1).

  In the figure, the elevator apparatus winds the main rope 2 around the drive sheave 1 of the hoisting machine, and connects the car 8 and the counterweight 9 to the both ends of the main rope 2 via the pulleys 3 to 7 in a suspending manner. is doing. Then, by rotating the drive sheave 1, the wound main rope 2 is moved to raise and lower the car 8 along a guide rail (not shown). 30 is a shock absorber, and 10 is a governor. An endless speed governor rope 12 is wound around the pulley 11 of the speed governor 10, and a car 8 is in contact with a shock absorber 30 provided in the pit 50 at the lower end of the speed governor rope 12. A tension pulley 13 is provided so as to be lower than the above position.

  A portion of the car 8 and the governor rope 12 are connected via a lever (not shown) for pulling up the safety devices 14 and 15, and the governor is operated at the speed of the car 8 in normal operation. When the specified overspeed is detected for some reason when the pulley 11 is driven to rotate, the lever is operated by the governor rope 12 to operate the emergency stop devices 14 and 15 and the car 8 is emergency stopped. It is comprised so that it may be made. The tension pulley 13 is provided with an encoder 16 as means for detecting the position or speed of the car.

  The attachment structure of the encoder 16 will be described in detail with reference to FIG.

  The tension pulley 13 is supported by a fixed shaft 18 via a bearing 17. The fixed shaft 18 has a protruding portion supported by a bracket 19, and the bracket 19 is attached to a bracket (not shown) fixed to a rail (not shown) so that it can slide freely or vertically. ing. A weight (not shown) is attached to the bracket 19 in order to apply tension to the governor rope 12. Further, one piece of the U-shaped bracket 20 is fixed to the bracket 19 by a bolt 21, and the other piece of the U-shaped bracket 20 is positioned on the opposite side of the fixed shaft 18. An encoder 16 is provided. Reference numeral 22 denotes a connecting body fixed to the tension pulley 13 by means of a bolt 23. The connecting body 22 is provided with a rotating shaft 24 so as to protrude on the opposite side of the fixed shaft 18, and the rotation of the rotating shaft 24 is detected by the encoder 16. The position or speed of the car is detected. A cover 25 protects the encoder 16.

  As shown in FIG. 2, in the hoistway 100, the car 8 does not descend to the position where the tension pulley 13 is disposed. Therefore, an encoder 16 that detects the position or speed of the car may be provided on the same axis as the tension pulley 13. There is no interference with other devices.

  Further, since the position and speed of the car can be detected by the encoder 16 provided on the tension pulley 13, it can be applied to the terminal floor forced reduction device.

  In addition, since the encoder 16 is provided on the opposite side of the fixed shaft 18 of the tension pulley 13, the encoder 16 can be easily installed and easily inspected.

  In addition, although the example which has arrange | positioned the speed governor 10 to the hoistway top part 40 was shown, arrangement | positioning of the speed governor 10 is not limited to this, For example, you may arrange | position to the pit 50.

It is a whole lineblock diagram showing the elevator device which is one embodiment of the present invention. It is a hoistway longitudinal cross-sectional view which shows the positional relationship of a speed governor and a cage | basket | car of FIG. FIG. 2 is a detailed view of a tension pulley portion (cross section A in FIG. 1).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drive sheave of hoist 2 Main rope 3-7, 11 Pulley 8 Car 9 Balance weight 10 Speed governor 12 Speed governor rope 13 Tension pulley 14, 15 Emergency stop device 16 Encoder 17 Bearing 18 Fixed shaft 19 Bracket 20 U-shaped bracket 22 connector 24 rotating shaft 25 cover 30 shock absorber 40 descending top 50 pit 100 hoistway

Claims (1)

An endless governor rope that is connected to an emergency stop device mounted on the car, and moves up and down the car, and a tension pulley that applies tension to the governor rope. The fixed shaft that supports the tension pulley via a bearing, the weight attached to the protruding side of the fixed shaft, and the governor rope is gripped when the car exceeds a specified speed, and the emergency stop device is operated. In an elevator apparatus equipped with a governor,
The tension pulley is provided below the position where the car contacts the shock absorber provided in the pit, and one piece is attached to a bracket provided on a fixed shaft of the tension pulley, and the other piece is the tension. A U-shaped bracket is provided across the top of the pulley and located on the anti-projection side of the fixed shaft. On the other hand, the tension pulley is provided with a connecting shaft provided with a rotating shaft that protrudes on the anti-fixed shaft side. An elevator apparatus comprising an encoder for detecting the position or speed of the car by detecting the rotation of the rotating shaft on the other piece of the bracket.

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