JPH061561A - Governor for elevator - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a speed governor for an elevator in which the shaft on which the sheave is fixed and the rotating sheave do not contact each other. [Structure] Base (1) supporting the shaft (4) of the sheave (5) and the sheave
Arrange a ratchet wheel (13) that operates at abnormal times due to excessive displacement of the flyweight provided in (5), and mount a cylindrical body (21) that fits with a gap formed in the shaft (4) on the base (1). It is fixed and the ratchet wheel (13) is pivotally supported by the outer surface of the cylindrical body (21). For this reason, the claw wheel (13) and the sheave
Relative rotation with both shafts (4) of (5) contacting each other,
There is no misalignment between them. [Effect] Stabilize operation and facilitate maintenance. Also,
Simplify assembly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed governor for an elevator, which operates by detecting an excessive speed of a lifting body to operate a safety gear.

[0002]

2. Description of the Related Art FIG. 3 and FIG.
It is a figure which shows the conventional governor for elevators shown by 3388 publication. In the figure, (1) is a base having a U-shaped cross section, and (2) is a bearing installed on the side wall of the base (1).
Bearing box with (3), (4) bearings on both ends (3)
A shaft pivotally supported on the shaft, (5) is a sheave fixed to the shaft (4), and (6) is arranged on the side surface of the sheave (5) facing each other via the shaft (4). A flyweight pivotally attached to the sheave (5) and whose weight side is rotationally displaced in a direction orthogonal to the axis of the shaft (4), (7)
The one end is engaged with the anti-weight side of the flyweight (6) and the other end is engaged with the side surface of the sheave (5), respectively, and the displacement action of the flyweight (6) by the centrifugal force when the sheave (5) is rotated. Counterbalancing spring, (8) is an operating pawl provided on the same side of the flyweight (6) as the engaging side of the balance spring (7), and (9) is screwed into the weight side of the flyweight (6). Both ends of the actuator (10) are pivoted to both flyweights (6), and the pivotal portions are arranged on opposite sides of the pivot point of the flyweight (6) itself. It is a link made.

Reference numeral (11) is a stop switch mounted on the base (1) and having an operating portion (12) facing the actuator (9), and (13) is an axis.
A ratchet wheel pivotally mounted on (4) and arranged to face the operating pawl (8),
The lower end of (14) is pivotally attached to the base (1) and the braking arm (15) is attached in the middle, and (16) one end is pivotally attached to the edge of the ratchet wheel (13). A threaded rod at the other end of the actuation rod is movably inserted into the upper end of the braking arm (14), and a spring receiver (17) is held by a nut (18) at the insertion end. (19) is a compression coil spring fitted between the screw rod part of the braking rod (16) and arranged between the braking arm (14) and the spring bearing (17), and (20) is wound around the sheave (5). Although not shown in the drawing, the rope is a speed governing rope, one side of which is held by a lifting body such as a car of an elevator device provided in a hoistway.

The conventional speed governor for an elevator is constructed as described above, and the sheave (5) is driven and rotated by the speed governing rope (20) moving together with the lifting body. The flyweight (6) revolves together with the sheave (5) due to the rotation of the sheave (5), and also the rotation displacement of the sheave (5), that is, the centrifugal displacement according to the ascending / descending speed of the lifting / lowering body causes the flyweight (6) to rotate. To do. Then, when the ascending / descending speed of the ascending / descending body reaches the first overspeed (usually about 1.3 times the rated speed) exceeding the predetermined value, the balance spring (7) by centrifugal force
Due to the rotational displacement of the flyweight (6) against the urging force of the actuator, the actuator (9) presses the operating portion (12) of the stop switch (11). As a result, the stop switch (11) is actuated to shut off the power source of the drive device of the elevator device (not shown) to stop the lifting body and prevent the accident caused by the first overspeed occurrence. It is configured.

However, in the event of an accident such as breakage of the main rope (not shown) of the elevator device, the lifting body continues to descend even if the drive device stops. At this time, if the speed of the lifting body reaches the second overspeed (usually about 1.4 times the rated speed),
Due to the rotational displacement of the flyweight (6) against the biasing force of the balance spring (7) due to the centrifugal force, the operating pawl (8) engages the pawl of the ratchet wheel (13). As a result, the ratchet wheel (13) rotates in the same direction as the sheave (5), so that the braking rod (16) is displaced and the braking arm (14) moves through the compression coil spring (19). It operates in the 5) direction, the braking piece (15) presses the speed governing rope (20) against the sheave (5), and the descent of the speed controlling rope (20) is braked. Then, the elevating body emergency stop device is activated by the braking of the speed-control rope (20), so that the elevating body is brought to an emergency stop.

[0006]

In the conventional elevator balance weight device as described above, the shaft (4) of the sheave (5) that rotates during normal operation of the elevator device is stationary on the shaft (4) of the elevator device during normal operation. Claw wheels to be held in position (13)
Is being held. Therefore, if the relative rotation between the shaft (4) and the ratchet (13) is hindered, the elevator governor may malfunction, or the shaft (4) and the ratchet (13) may not rotate. There is a problem that the sliding portion is worn away.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain an elevator governor in which a ratchet wheel is not directly pivoted on a shaft on which a sheave is fixed and which rotates. And

[0008]

In an elevator governor according to the present invention, a base that pivotally supports a shaft fixed to a sheave, and a shaft that is pivotally supported by the sheave and rotates with respect to the sheave. , Fixed to the base, and a flyweight that revolves around the shaft, a pawl wheel that is rotatably arranged with respect to the shaft, and that operates abnormally due to excessive displacement of the flyweight due to overspeed rotation of the sheave. A cylindrical body is provided, which is arranged in a fitted state with a gap formed in the shaft, and which has an outer surface pivotally supporting the ratchet wheel. Further, there is provided a cylindrical body which is fixed to the base and fitted to the shaft, has an outer surface for pivotally supporting the ratchet wheel, and an inner surface provided with a bearing for pivotally supporting one end of the shaft of the sheave.

[0009]

The claw wheel of the elevator governor constructed as described above is pivotally supported by the cylindrical body fixed to the base, regardless of the shaft of the sheave.

[0010]

【Example】

Example 1. FIG. 1 is a diagram showing an embodiment of the present invention. The configuration is similar to that of FIG. 3 except for FIG.
In FIG. 1, (1) is a base having a U-shaped cross section, (2) is a bearing box provided with bearings (3) arranged on the side wall of the base (1), and (4) is both ends. Shafts, each of which is pivoted on a bearing (3),
(5) is a sheave fixed to the shaft (4), and (21) is a cylindrical body with a collar that is fitted in the shaft (4) with a gap, and is inserted into the side wall of the base (1). The flange portion is fixed to the side wall of the base (1), and the bearing box (2) is attached to the flange portion. Reference numeral (13) is a ratchet wheel which is pivotally supported on the outer surface of the cylindrical body (21) and is arranged so as to face the operating pawl (8).

In the elevator governor constructed as described above, the ratchet wheel (13), which is held stationary during normal operation of the elevator apparatus, is pivotally supported by the stationary cylindrical body (21). Therefore, relative rotation in which the ratchet wheel (13) contacts the shaft (4) does not occur. Therefore, when the ratchet wheel (13) comes into contact with the shaft (4) and the relative rotation is impeded, malfunction of the speed governor for the elevator occurs, or between the shaft (4) and the ratchet wheel (13). It is possible to eliminate the occurrence of obstacles such as wear of the sliding portion. As a result, the operation of the governor for an elevator can be stabilized, reliability can be improved, and maintenance work can be facilitated.

Example 2. FIG. 2 is a diagram showing another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 indicate the corresponding parts, and (21) is a cylindrical body fitted on one side with a gap formed in the shaft (4) and inserted into the side wall of the base (1) so that the base is inserted. A bearing (3) is fixed to the side wall of the base (1), and the inner surface on the other side is mounted with a bearing (3) for pivotally supporting one end of the shaft (4). Reference numeral (13) is a ratchet wheel which is pivotally supported on the outer surface on one side of the cylindrical body (21) and is arranged so as to face the operating pawl (8).

Also in this embodiment, since the ratchet wheel (13) is pivoted on the stationary cylindrical body (21), a detailed description thereof will be omitted, but the embodiment of FIG. 2 is similar to the embodiment of FIG. It is clear that such an effect can be obtained. Also, in the embodiment of FIG.
Since the bearing (3) and the ratchet wheel (13) are arranged in the cylindrical body (21), the bearing (3) and the ratchet wheel (13) will not be misaligned with each other, and the number of assembly steps will be reduced. It is possible to easily obtain high-precision products without using them.

[0014]

As described above, according to the present invention, a base which pivotally supports a shaft fixed to a sheave, and a shaft which is pivotally supported by the sheave and rotates about the sheave and revolves around the shaft. A flyweight, a pawl wheel that is rotatably arranged with respect to the shaft, and operates at abnormal times due to excessive displacement of the flyweight due to overspeed rotation of the sheave, and is fixed to the base to form a gap in the shaft. And a cylindrical body that is arranged in a fitted state and that has a ratchet wheel pivotally supported by the outer surface. Further, a cylindrical body is provided, which is fixed to a base and fitted to the shaft, pivotally supports a ratchet wheel by an outer surface, and has an inner surface provided with a bearing for pivotally supporting one end of the shaft of the sheave.

As a result, the ratchet wheel, which is held stationary during normal operation of the elevator apparatus, is pivoted by the cylindrical body fixed to the base without contacting the shaft of the sheave.
Therefore, the relative rotation of the ratchet wheel on the shaft does not occur, and the relative rotation of the shaft and the ratchet wheel on each other is impeded, which causes malfunction of the elevator governor, and The sliding parts between the ratchet wheels are not worn away. Therefore, there is an effect that the operation of the governor for an elevator is stabilized and maintenance work is facilitated. Further, by disposing the bearing and the ratchet on the cylindrical body, there is no misalignment between the bearing and the ratchet, and there is an effect that the number of assembling steps is reduced and the accuracy of the product is improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention and will be described later with reference to FIG.
Corresponding figure.

FIG. 2 is a diagram showing a second embodiment of the present invention, and FIG.
Corresponding figure.

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

FIG. 4 is a view conceptually showing a part of the right side surface of the vertical section of FIG. 3 omitted.

[Explanation of symbols]

 1 Base 3 Bearing 4 Shaft 5 Sheave 6 Flyweight 13 Claw 21 Cylindrical body

Claims (2)

[Claims] 1. A base supporting a shaft fixed to a sheave,
A flyweight that is pivotally supported by the sheave, rotates about the sheave, and revolves around the shaft; and a flyweight that is rotatably arranged with respect to the shaft and is rotated by the overspeed of the sheave. The flywheel is provided with a ratchet wheel that operates abnormally due to excessive displacement, and a cylindrical body that is fixed to the base and is arranged in a fitted state with a gap formed in the shaft, and that has an outer surface that pivotally supports the ratchet wheel. Elevator governor. 2. A base which pivotally supports a shaft fixed to the sheave,
A flight weight that is pivotally supported by the sheave, rotates about the sheave, and revolves around the shaft, and is rotatably arranged with respect to the shaft. A claw wheel that operates at abnormal times due to excessive displacement of the fly weight,
A cylindrical body which is fixed to the base and fitted into the shaft with a gap formed therein, and which has an outer surface for pivotally supporting the ratchet wheel and an inner surface for which a bearing for pivotally supporting one end of the shaft of the sheave is mounted; Elevator governor equipped with.