JP3061514B2 - Governor device for elevator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Generally, an elevator detects the speed of a car or a counterweight when the speed of the car or the counterweight exceeds a specified speed, and operates an emergency stop device provided on the car or the counterweight. A governor device for stopping the car or the counterweight is provided.

A conventional elevator governor is shown in FIGS.
Referring to FIG. 8, a case where a governor is provided on the car side will be described.

In FIG. 6, one end of an elevator car 1 is shown.
The car 1 is suspended by the main rope 3 having the other end connected to the counterweight 2, and the hoist 4 lifts the car 1 and the counterweight 2 in a fishing bottle manner. The governor rope 5 is connected endlessly to the operation mechanism of the emergency stop device (not shown) of the car 1 to form an endless shape, and the main wheels of the governor 7 provided on the machine room floor 6 and the hoistway 8 It is wound around the tension device 9 provided at the bottom.

7 and 8, the governor 7 has a governor main wheel (sheave) 10 which is rotated by a governor rope 5 in synchronization with the traveling of the car 1. Car 1 runs and governor rope 5
When the sheave 10 rotates, the flyweight 11 provided on the sheave 10 opens outward due to centrifugal force. If the speed of the car 1 exceeds the specified speed in the descending direction,
A part of the fly weight 11 is connected to the ratchet 12, the hook 13 is operated, the rope catching head 14 at the tip of the lever 16 of the rope catching device, which is held by being hooked, is removed and dropped by its own weight. , The lower governor rope 5 is restrained and held between the rope receiver 15.

The rope catch device 18 comprises a rope catch 18a and a rope receiver 15, and the rope catch 18a further comprises a rope catch head 14, a lever for supporting the same, a pressing spring 19 for pressing the 16 head, and the like. .

[0007] The rope catch head 14 is attached to the tip of the lever 16 by a loose fit so as not to fall off, and a gap is provided to move back and forth in the direction of the lever center line. The lever 16 is supported by a shaft 17. A pressing spring 19 pressing the rope catching head 14 is fitted to the lever 16 to generate a holding force when the governor rope 5 is restrained. With this configuration, the emergency stop device operating mechanism of the car 1 is operated to stop the car 1 in an emergency.

[0008]

However, the governor 7 constructed as described above has the following problems.

When the car 1 descends at an excessive speed and the rope catching head 14 falls, and the descending governor rope 5 is restrained by the rope receiver 15, the rising governor rope 5 located opposite to the sheave 10 has its own inertia. The governor rope 5 is lifted by the force, and thus separates from the sheave 10. The cover 20 is provided to prevent the governor rope 5 from falling off from the sheave 10, but the height of the hoistway 8 becomes large and the weight of the governor rope 5 is large, or the rated speed of the elevator is large and the prescribed regulation is required. When the speed of the speed unit 7 is high, the inertia force of the governor rope 5 becomes very large, and the governor rope 5 jumps violently.
As shown in (2), the governor rope 5 may be caught between the cover 20 and the sheave 10, and the governor rope 5 and the sheave 10 may be damaged. In such a case, a great deal of labor is required for the recovery. Further, the governor rope 5 falls off the sheave 10 over the cover 20, and the state shown in FIG. 10 is required, and the governor rope 5 needs to be replaced or the governor rope 5 cannot be restrained, which may affect the emergency stop of the car 1. There is a problem to do.

An object of the present invention is to solve such a problem and to obtain a governor device which prevents a governor rope from falling off a sheave and ensures a normal governor rope holding operation.

[0011]

Means for Solving the Problems A conventional first rope catching device for restraining the governor rope on the descending side when the descending speed of the car or the counterweight becomes excessively high, and further restraining the governor rope on the ascending side. A second rope catch device is provided.

That is, the levers forming the first rope catch and the second rope catch are supported by a rotating shaft in the middle of one rod, and are formed by levers that move up and down in opposite directions. A second rope catch. The first rope catch head may be heavier than the second rope catch head or the lever may be longer. Further, pressing springs for generating the holding force of the governor rope are fitted respectively.

[0013]

When the car or the counterweight becomes too fast, the first rope catch and the second rope catch simultaneously restrain and hold both the descending side and the ascending side of the governor rope.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the embodiments shown in FIGS.

A case where a speed governor 21 is provided on a car will be described with reference to FIGS.

A pair of first rope catches 22 and rope receivers 15 for restraining the governor rope 5 on the descending side to the governor 21 and a pair of second rope catches 24 and rope receivers 15 for restraining the governor rope 5 on the upward side are restrained. 25 are provided.

The levers of the first rope catch 22 and the second rope catch 24 support a single rod 26, and two levers 26a, 2
6b.

Further, a pressing spring 28 serving as a holding force when the first rope catch 22 holds the governor rope 5 is provided between the first rope catch 22 and the shaft 27. Similarly, a pressing spring 29 is provided between the second rope catch 24 and the shaft 27. The joints of the heads 14 and 23 of the first and second rope catches with the levers 26a and 26b are loose fits, and a gap is also provided to prevent the head from coming off in the axial direction.
In normal times, the head 14 and the lever 26a of the first rope catch are in close contact with each other by the springs 28 and 29. Further, the first rope catch 22 is heavier than the second rope catch 24, and the moment around the shaft 27 is larger on the first rope catch 22 side, so that the rope catch 2
The rotation directions of 2 and 24 are such that the governor rope 5 is restrained on both the descending side and the ascending side.

When the speed of the car 1 is lower than a predetermined speed, the hook 13 is disengaged by the same operation as the conventional governor 7, and the first rope catch 22 is dropped. Then, as shown in the governor operation state diagram in FIG. 3, the governor rope 5 is restrained by the first rope catch 22 and the rope receiver 15, and the second rope catch 24 is
The governor rope 5 is lifted with the fulcrum 7 as a fulcrum, and the governor rope 5 is restrained and held.

At this time, the heads 14 and 2 are separated from the rope catches, and the holding force of the governor ropes 5 and 5 on the descending and ascending sides is obtained by the pressing springs 28 and 29. in this way,
Since the governor rope 5 is held by the governor rope 5 on the ascending side, the lifting due to the inertia force of the governor rope 5 does not occur at the sheave 10, and the governor rope 5 does not separate from the sheave 10, and therefore does not fall off from the sheave 10. Absent.

According to the speed governor 21 of the present invention, the governor rope is reliably prevented from falling off the sheave, the governor rope and the sheave are prevented from being damaged, and the rope is restrained at two points on the descending side and the ascending side of the governor rope. By doing so, holding power and reliability are improved.

Another embodiment of the present invention will be described.

Another Embodiment 1 (refer to FIG. 4) The first and second rope catches 22,
The length of the first rope catch (downward side) is increased by changing the length of the lever 24. As for the position of the shaft 31, the distance to the first rope catch 22 is larger than the distance to the second rope catch 24. Thereby, the pressing spring 32 on the first rope catch 22 side is made longer than the pressing spring 33 on the second rope catch 24 side. According to the speed governor 30, the first rope catch 22
However, the speed at which the second rope catch 24 restrains the governor rope 5 becomes faster than the speed at which the second rope catch 24 restrains the governor rope 5, and a speed difference is obtained. Larger than the rope catch 24 side. According to the speed governor 30, in addition to the effects described above, the first rope catch 22 and the second rope catch 24 generated when the governor ropes 5, 5 on the descending side and the ascending side are held are caused to jump up and down. The jumping of the governor ropes 5, 5 is not skipped, and the governor rope 5 can be more reliably held.

Second Embodiment of the Present Invention (See FIG. 5) Pressing spring 3 on first rope catch 22 side of governor 34
5 is larger than the spring constant of the pressing spring 36 on the second rope catch 24 side, and the pressing spring 36 on the second rope catch 24 side is
7, and the pressing springs 35 and 36 can be individually adjusted and set. Thereby, the first rope catch 24 side can reach the regular rope holding force earlier than the second rope catch 24 side. According to the speed governor 34, in addition to the above-described effects, the sheave 1 by holding the governor rope 5 at two places, the first rope catch 22 and the second rope catch 24.
There is also an effect that the load applied to zero can be reduced by delaying the generation of the regular holding force on the second rope catch 24 side. In each of the above-described embodiments, the car 1
Although an example using a governor on the side is shown, the same applies when a governor is used on the counterweight 2 side.

[0025]

According to the present invention, the governor rope can be prevented from falling off the sheave and the governor rope and the sheave can be prevented from being damaged.
Furthermore, by simultaneously holding both the descending side and the ascending side of the governor rope, the reliability and the holding force of the operation of the governor rope are improved, and the governor rope holding operation can be always ensured.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an operation explanatory diagram of FIG. 1;

FIG. 4 is a front view of another embodiment of the present invention;

FIG. 5 is a front view of still another embodiment of the present invention.

FIG. 6 is a schematic diagram of an elevator,

FIG. 7 is a front view of a conventional governor,

8 is a sectional view taken along line VIII-VIII in FIG. 7;

9 is an operation state diagram of FIG.

FIG. 10 is an operation state diagram of FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Basket 5 ... Governor rope 7.21 / 30/34 ... Governor 10 ... Sheave 14 ... Rope catch 15 ... Rope receiver 16/26 ... Rod 17.27 / 31 ... Shaft 19/28/29/32/33 / 35, 36, 37: press spring 20: cover 22, 24: first and second rope catches 23, 25: first and second rope catches

Claims (3)

(57) [Claims] 1. A rope connected to a car or a counterweight, and provided between a descending side of a governor rope circulating around a governor main wheel and a tension sheave and a corresponding rising side rope. When the lowering speed of the car exceeds the set speed, the action of the flyweight of the speed governor causes the rope catch of the rope catching device to move between the rope catch and the rope receiver together with the operation of the pressing spring. In an elevator governor device that restrains a governor rope and operates an emergency stop device of a car or a counterweight connected to the governor rope, two levers are formed by dividing a rod into two parts on the left and right sides using the center of one rod as a fulcrum. Configure the rope catch respectively,
An elevator governor device comprising a first rope catch for a descending side and a second rope catch device for an ascending side for simultaneously restraining the descending side and the ascending side of the governor rope. 2. The speed governor for an elevator according to claim 1, wherein the length of the lever of the first rope catch is longer than the length of the lever of the second rope catch. 3. The elevator governor according to claim 1, wherein the spring constant of the pressing spring of the first rope catch is larger than the spring constant of the pressing spring of the second rope catch. .