JPH04323184A - Speed gavernor for elevator - Google Patents

Abstract

PURPOSE:To provide the speed controller of an elevator facilitating maintenance and inspection work by improving the structure difficult to conduct the work because of the space of the machine room of the elevator. CONSTITUTION:A sheave part consisting of a sheave 6 rotated by a speed controller rope 8, and a cover part consisting of fly weights 9, 9a to which rotation is transmitted by a shaft 7 fixed to the sheave 6 and a switch 14 operated by the displacement of the fly weights 9, 9a are separated at a determined interval. Thus, the maintenance and inspection work to the sheave, fly weights and switch is facilitated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an elevator governor that detects overspeed of a car by the displacement of flyweights caused by centrifugal force in response to the rotation of a sheave.

0002

2. Description of the Related Art FIG. 6 is a perspective view showing the structure of a conventional elevator speed governor and its surroundings. In FIG. 6, 1 is a hoisting machine to which the rotation of a motor 2 is transmitted via a speed reduction mechanism to raise and lower a main rope on which a car and a counterweight are suspended, 3 is a machine stand, and 4 is a hoist that rotates according to the car speed. This is a speed governor that detects overspeed of the car using the centrifugal force of the flyweights.

FIG. 7 is a partial sectional view showing the main parts of a conventional elevator governor disclosed in, for example, Japanese Utility Model Publication No. 64-9971. In the figure, 5 is the speed governor main body, 6 is a sheave rotatably fitted and supported on a shaft 7 fixed to the main body 5,
A governor rope 8 is wound around the sheave 6, and one end thereof is held by an elevator car (not shown). 9 and 9a are a pair of flyweights whose one end is pivotally connected to the sheave 6, and which are disposed at opposing positions on both sides of the shaft 7 and are displaced in a direction perpendicular to the axial direction of the shaft 7; 10 is a flyweight 9; , 9a, and is pivotally connected to both flyweights 9, 9a so as to move in the same direction.

11 is a spring whose one end is connected to one of the flyweights 9 and the other end is connected to the sheave 6 to resist centrifugal force; 12 is an actuator consisting of a bolt screwed into the center of gravity of one of the flyweights 9; 13 is a claw provided on the opposite side of the flyweight 9 to which the actuator 12 is provided; 14;
is an actuating arm 1 attached to the main body 5 and facing the actuator 12.
4a, a car stop switch 15 is a ratchet wheel pivotally supported on the shaft 7, and the pawl 13 is turned off only when the sheave 6 rotates in one direction.
The ratchet wheel 15 is also connected to a mechanical emergency stop (both not shown) via a brake mechanism.

In the conventional elevator governor configured as shown in FIG. 7, the sheave 2 rotates as the governor rope 8 moves in synchronization with the elevator car's ascent and descent. For this reason,
The flyweights 9, 9a revolve together with the sheave 6 and are displaced by centrifugal force corresponding to the rotational speed of the sheave 6, that is, the speed of the car. When the elevator car reaches a first overspeed exceeding a predetermined value (usually about 1.3 times the rated speed), the actuator 12 moves the car stop switch 14 due to the displacement of the flywheels 9 and 9a due to centrifugal force. operating arm 14 of
a to rotate the operating arm 14a and operate the switch 14 to cut off the power to the elevator drive device (not shown) and stop the car.

Furthermore, even if the drive device stops due to, for example, the main rope of the elevator breaking, the car continues to descend without stopping, resulting in a second overspeed (usually about 1.4 times the rated speed). ), the sheave 6 corresponding to this speed
The flyweights 9 and 9a are displaced by the centrifugal force caused by the rotation of the flyweights 9 and 9a, and the claws 13 engage with the ratchet wheel 15. Therefore, the governor rope 8 is braked by the braking mechanism connected to the ratchet wheel 15,
The emergency stop device installed in the car operates and the car suddenly stops.

[0007]

[Problems to be Solved by the Invention] In the conventional elevator governor configured as described above, the amount of movement of the fly weights 9, 9a which are pivotally connected to the sheave 6 and move according to the car speed, and the fly weight 9 , 9a in the centrifugal direction and the car stop switch, etc., it is easier to adjust the speed governor if it is located close to the wall of the machine room or the hoisting machine. There was a problem that complete maintenance could not be performed.

[0008] This invention was made in order to solve the above-mentioned problems, and provides a speed control system for an elevator that allows easy maintenance and inspection even when installed in a machine room with limited space. The purpose is to obtain an opportunity.

[0009]

[Means for Solving the Problems] The speed governor for an elevator according to the present invention includes a sheave portion that rotates around which a rope connected to the car at one end is wound, and an overspeed of the car by the rotation of the sheave. The flyweight to be detected and the cover part consisting of switches and the like are separated at a predetermined interval.

0010

[Operation] In this invention, since the sheave part and the cover part are separated at a predetermined interval, the separated space can be used for maintenance and inspection of the sheave, flyweight, switch, etc. Work becomes easier.

[0011]

Embodiment FIG. 1 is a perspective view showing a schematic configuration of an elevator governor according to an embodiment of the present invention, FIG. 2 is a front view showing the overall configuration, FIG. 3 is a plan view of FIG. 2, and FIG. A in Figure 2
-A sectional view, and FIG. 5 is a view taken in the direction of arrow B in FIG. 2 showing the cover portion.

In FIGS. 1 to 5, parts having the same reference numerals as those in the conventional example shown in FIG. 7 are the same or corresponding parts. Reference numeral 21 denotes a rotary plate to which the flyweights 9 and 9a are pivotally attached, and is fixed to the shaft 7, and the rotation of the sheave 6 fixed to the other end of the shaft 7 is transmitted. Reference numeral 22 designates an operating lever that rotates about a pin 22a, 23 a link that is connected to the operating lever 22 by a pin 23a, and 24 a spring-operated lever that rotates about a pin 24a, which is connected to the link 23 by a pin 24b. has been done. 25 is a push spring, and the spring seat 2 is normally
The spring seat 25a is held by the tip 24c of the spring actuated lever 24, which locks the spring seat 25a via the lever 5a, and is in a biased state. 26 is a tension spring that urges the link 23 to the left in the figure. 27 is a square metal fixed to the governor body side, 28 is a wedge, 29 is a square metal 27 and wedge 2
This is the roller installed between the 8 and 8.

In the elevator governor constructed as described above, the sheave 6 is rotated by the movement of the governor rope 8, one end of which is connected to the car, as the car moves up and down, and the sheave 6 is fixed. The rotating plate 22 rotates via the shaft 7 that is attached to the rotating shaft 7. A pair of flyweights 9, 9a provided on the rotating plate 22 are normally operated by centrifugal force.
The rotation of a in the centrifugal direction is suppressed by the spring 11, but when the car speed exceeds a predetermined value, the rotation angle increases further against the suppressing force of the spring 11, and the car stop switch 14 is turned off. When the car hits the operating arm 14a and activates the car stop switch, the elevator drive device (not shown)
Cut off the power to the car and stop the car.

Furthermore, in the case where the main rope of the elevator breaks, for example, the car will continue to descend even if the power to the drive device described above is cut off. The actuator 22 shown is pressed by the flyweight 9 and rotates counterclockwise around the pin 22a, so that the spring-operated lever 24 rotates clockwise around the pin 24a via the link 23. With this rotation, the tip 24c that locks the spring seat 25a comes off, and the push spring 25 presses the wedge 28, and the braking action of this frictional force causes the sheave 6 to stop suddenly, and the governor rope 8
Stop the car connected to the position end.

[0015] In the above-mentioned elevator speed governor, even if the cover section composed of the flyweights 9, 9a, etc. is installed close to the machine room wall surface due to space constraints in the machine room, etc. By utilizing the space between the cover section and the sheave section, the flyweights 9, 9a
Since the adjustment work of the car stop switch 14, springs, etc. becomes easy, complete maintenance and inspection can be performed.

[0016]

[Effects of the Invention] As described above, according to the present invention, the cover section and the sheave section are separated at an appropriate interval, and rotation is transmitted by the shaft provided between them. Therefore, it is possible to obtain an elevator speed governor that has a reliable emergency stop function when the car overspeeds and can be easily operated during maintenance and inspection.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a front view showing the overall configuration of the invention.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a sectional view taken along line AA in FIG. 2;

FIG. 5 is a view taken along arrow B in FIG. 2;

FIG. 6 is a perspective view showing the configuration of a conventional elevator speed governor and its surroundings.

FIG. 7 is a front view showing a configuration example of a conventional elevator speed governor.

[Explanation of symbols]

6 Sheave 7 axis 8 Governor rope 9,9a Fly weight 14 Car stop switch 21 Rotating plate

Claims (1)

[Claims] Claim 1: A sheave part consisting of a sheave, etc., which rotates around which a rope connected to a cage at one end is wound, and a rotary plate, to which rotation is transmitted via a shaft fixed to the sheave. 1. A speed governor for an elevator, characterized in that a cover portion comprising a switch or the like that operates according to the displacement of the flyweight when the car overspeeds is separated at a predetermined interval.