JPH06263359A - Elevator governor - Google Patents

Abstract

(57) [Abstract] [Purpose] In the flyball type governor for speed control of elevators, the centrifugal speed is determined with respect to the weight rotation speed, and the outer shape of the adjustment spring is limited, so the rated speed range is applied. Is narrowing. The present invention is to obtain a flyball type governor applicable to a wide range of rated speeds. [Structure] The fly ball is screwed to the arm,
The fixed position can be adjusted, and by adopting a structure in which small weights are stacked, the weight can be easily selected, and the set value of the operating speed of the governor can be easily adjusted over a wide range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a governor for speed control of an elevator.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional elevator governor.
This will be described with reference to FIG.

As a safety device for an elevator, a governor 2 which operates according to the traveling speed of a car 1 is installed in a machine room 3,
An emergency stop device 4 interlocking with this is provided in the car. on the other hand,
A buffer 5 is installed on the pit floor of the hoistway.

When the car 1 is in an overspeed state, the governor 2 turns off the power of the drive system of the car and acts on the car emergency stop device 4 so that the emergency stop device 4 grasps the guide rail 6 to remove the car. Brake. The pit floor buffer 5 acts as a shock absorber to prevent the car from colliding directly with the pit.

The overspeed of the car in which the governor 2 operates is determined by the law in accordance with the rated speed of the elevator. In general, the governor has a function of finely adjusting the operating speed and a different rated speed. It has a structure.

An example of a flyball type governor 2 used in a high speed elevator will be described (see FIG. 3).

The rotation of a governor sheave 8 around which a governor rope 7 traveling along with the car 1 is rotated is a pair of bevel gears 9, 9.
The spindle 10 is rotated via the and the fly ball 11 is rotated. The coil spring 12 is an adjusting spring for adjusting the operating speed of the fly ball 11 by its spring force.

The traveling speed of the car is transmitted to the governor sheave 8 via the governor rope 7, and the fly ball 11 fixed to the arm 13 via the bevel gears 9 and 9 is attached to the spindle 1.
Rotate around 0. Since the arm 13 moves up and down on a vertical plane around the fulcrum 14, the flyball 11 moves toward the arm 1
It moves up and down with respect to the fulcrum 14 of 3. Therefore,
As the speed of the car increases, the speed of rotation of the fly ball increases, causing the centrifugal force to move in a position that balances the initial pressure of the adjusting spring.

The operation of turning off the drive power source and the operation of the safety device utilize the movement of the fly ball at that time.

Therefore, in order to set the operating speeds according to the difference in the rated speeds, the speed is set by changing the initial value of the adjusting spring or changing the spring itself to one having a different spring constant. .

[0011]

In order to set speeds for different rated speeds, it is necessary to change the adjusting spring. However, since the external dimensions of the spring to be attached are limited, the initial pressure, There was a problem that the spring constant or compression length could not be selected and the speed setting range was narrow.

The present invention has been made in consideration of the above problems in a fly ball type governor, and an object thereof is to obtain a governor having a wide speed setting range and easy adjustment.

[0013]

For this reason, a screw is provided on each of the arm and the fly ball, and they are fixed by screwing. Further, the fly ball is formed by laminating a plurality of weights.

[0014]

The governor operating speed can be variously set by fixing the fly ball at an arbitrary position with respect to the arm and by appropriately adjusting the weight of the fly ball by increasing or decreasing the number of weights.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on the embodiments shown in FIGS.

The arm 16 to which the flyball 15 is attached is threaded to make a screw hole in the flyball 15. The fly ball 15 is a small disk formed by stacking a plurality of small weights 17 each having a screw hole at the center. This is screwed into the arm 16 and attached. At this time, if a plurality of weights 17, 17, ...

The governor having such a configuration has the following functions.

When the conventional one is applied to a speed setting range which is initially determined and further to a high rated speed, the initial value pressure of the spring is increased to open the fly ball (start the fly ball rising). The speed must be increased, but if the initial deflection of the spring is too large, there is a problem that the working stroke is insufficient. On the other hand, by making the center of gravity of the flyball closer to the spindle (center of rotation) or reducing the weight of the flyball to reduce the centrifugal force, the initial deflection of the spring can be reduced, and the flyball opens faster. Can handle the speed of the stock.

[0019]

According to the present invention, since the governor can cope with a wide rated speed range and can easily change the operation setting speed for the adjustment at the installation site, the workability can be remarkably improved. Becomes

[Brief description of drawings]

FIG. 1 is a front view of a governor according to the present invention.

2 is a partial perspective view of FIG. 1,

FIG. 3 is a front view of a conventional governor,

FIG. 4 is a schematic diagram of an elevator configuration.

[Explanation of symbols]

 1 ... Basket 2 ... Governor 10 ... Spindle 11, 15 ... Flyball 13, 16 ... Arm 17 ... Small weight

Claims (2)

[Claims] 1. An elevator governor in which a flyball is attached to a spindle that interlocks with a car speed via an arm, and the car speed is controlled according to a displacement of the flyball due to a centrifugal force. The flyball is attached to one end of the arm. On the provided screw,
An elevator governor characterized by being screwed in and fixed. 2. The elevator governor according to claim 1, wherein the fly ball is formed by stacking a plurality of weights having screw holes.