JPH012988A - Hoisting machine for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a method for constructing bamboo relegation cages for high-rise buildings. The present invention relates to a lowering elevator machine, and particularly relates to a vibration absorbing device for reducing vibration noise of a car in this elevator hoisting machine.

(Prior Art) Generally, in an elevator winding machine equipped with a gear reduction mechanism, due to the meshing operation of the gear reduction mechanism, this becomes an excitation source of elastic wave vibration of the main rope, and this Vibration noise is generated in the car, which may cause passengers (users) to feel uncomfortable or anxious, making the ride uncomfortable.

This heel elevator hoist that has already been proposed is constructed as shown in FIGS. 3 to 5.

That is, in FIGS. 3 to 5, a worm wheel 2 is installed on a base 1 laid on the upper part of a high-rise building, and the worm wheel 4 is attached to a frame 3.
A main sheave 5 is coaxially mounted on a rotating shaft 6, and a worm 7 that meshes with the worm wheel 4 is connected via a brake drum 8 to the worm wheel 4. It is connected to an output shaft 9a of a drive motor 9 installed on the base 1. A main rope 10 is wound around the main sheave 5, and a car 11 or a shock absorber 12 is provided at one end 10a of the main rope 10. That is, as shown in FIG. 4, this shock absorber 12 connects a rod 3 to one end 10a of the main rope 10, and buffers a crushed body integral with the car 11 in the twenty lots 13. It is attached via a spring 15. Further, a counterweight 16 is attached to the other end 10b of the main rope 10.
is attached via a deflection sheave 17 provided on the base 1.

Therefore, in the elevator hoisting machine described above, by driving the drive motor 9, the output shaft 9a of the drive motor 9 rotates, and the main sheave 5 of the hoisting machine 2 connected to it rotates. By rotating forward or backward, the car 1 is raised and lowered via the main rope.

However, the worm gear mechanism 12 in the above-mentioned elevator hoisting machine has a worm 7 and a worm wheel 4.
This causes uneven rotation in the main sheave 5 due to the meshing error with the main sheave 5, which in turn excites the main rope 10, resulting in the generation of vibration noise in the car 1.

In particular, when the main rope 10 reaches a certain length, elastic wave vibration occurs, and when it resonates at the excitation frequency from the worm gear mechanism 12, the vibration noise of the car 11 increases rapidly.

This can be expressed numerically as shown below.

f −−X Z (Hz) However, the excitation frequency is f. The rated rotational speed of the binding and drive motor is Nrpm, and the number of teeth of the worm gear is Z.

Therefore, in order to reduce the transmission of the above-mentioned vibrations, the spring constant of the buffer spring 15 is set small, but due to the increase in deflection of the buffer spring 15 due to the load of the car 11, when the elevator stops, the floor Since there is a risk of creating a difference in the height between the height and the floor of the car 11, and there is a limit to reducing the constant of the buffer spring 15, as shown in FIG. A weight 18 is attached via a buffer spring 15, thereby changing the elastic properties of the main rope 10 and causing the main rope 9 to resonate at the excitation frequency.
A shortened version has been proposed.

(Problem to be Solved by the Invention) However, the vibration absorbing device in the above-mentioned elevator hoisting machine prevents the resonance phenomenon of the main rope 10 from occurring unless the car 11 crosses the top floor. Although it is possible to reduce the vibration noise of the car, in order to satisfy the above-mentioned conditions, the weight 18 must be approximately 200 kg.
It would have to be relatively heavy, and this would not be of practical use.

The present invention has been made in view of the above-mentioned circumstances, and is an elevator that improves the ride comfort of the car by reducing the vibration of the main sheave, which is the source of vibration of the car and the main rope. The purpose of this invention is to provide a machine for winding.

[Structure of the invention]

(Means for solving the problems and their effects) The present invention includes:
A hoist is installed on the second base, a main rope is wound around the main sheave of the hoist, a car is attached to one end of the main rope, and a counterweight is attached to the other end of the main rope. In an elevator hoisting machine equipped with a traction machine, a vibration absorption mechanism is installed on the rotating shaft of the main sheave to reduce the vibration of the main sheave, which is the source of vibration of the car and the main rope, and improve the ride comfort of the car. It is designed to achieve this goal.

(Example) Hereinafter, the present invention will be described with reference to an illustrated embodiment.

It should be noted that the present invention will be described with the same reference numerals attached to the same constituent parts (A) as in the above-described specific example.

In FIG. 1, reference numeral 1 is a foundation laid at the top of the hoistway of a high-rise building, and on this 1J board 1, a mud floor 2 is installed, and this hoisting 12 is attached to a frame 3. A worm wheel 4 and a main sheave 5 are integrally coaxially mounted on a rotating shaft 6, and the worm wheel 4 includes:
It is connected to an output shaft 9a of a drive motor 9 installed on the base plate 1 via a worm 7 or a brake drum 8 that meshes with this. The main sheave 5 also includes a main rope 10.
The main rope 10 is wound around one end 10a of the main rope 10 and is provided with a car 11 or a shock absorber 12 therebetween. That is, as shown in FIG. 4, this shock absorber 12 has a rod 13 connected to one end 10a of the main rope 10, and a frame integral with the car 11 attached to the rod 13. It is attached via a buffer spring 15. Further, a counterweight 16 is attached to the other end 10b of the main rope 10 via a deflecting sheave 17 provided on the base 1.

On the other hand, a vibration absorbing mechanism 19 is provided on the rotating shaft 6 of the main sheave 5, and this vibration absorbing mechanism 19 includes a weight 21 attached to each free end of a laminated plate-shaped elastic member 20. When the main sheave 5 rotates, the elastic portion 10'20
A vibration absorbing mechanism 19 using a weight 21 reduces the vibration of the main sheave 5 and prevents it from propagating to the main rope 10 of the car 11.

Therefore, the 11 elevators Aikai described in 1. By driving the drive motor 9, the output shaft 9a of the drive motor 9 rotates, and the main sheave 5 of the winding-F machine 2 connected thereto is rotated forward or reverse, thereby rotating the main rope] 0, while raising and lowering the car 11,
The vibration absorbing mechanism 19 reduces the vibration of the main sheave 5 and the vibration of the car 11, thereby improving the riding comfort of the car 110.

Next, the present invention will be explained using mathematical formulas as follows.

That is, when the spring constant in the deflection direction of the elastic part 20 is k, and the length from the rotating shaft 6 to which the elastic part 2o is fixed to its free end is ρ, it is determined by the formula EI.

Note that here, E represents Young's modulus, and ■ represents the second moment of area of the elastic member 20.

Further, the vibration absorption frequency f of the horizontal vibration absorber 19 is calculated by 1 according to the following formula.

However, W indicates the weight of the weight 21, and g indicates the acceleration of the assembly.

In this way, the vibration absorbing mechanism 19 can absorb the vibration frequency generated from the main sheave 5 and the like at the vibration absorption frequency f.

Next, another embodiment of the present invention shown in FIG.
A ring-shaped 1M21' is provided on the outer periphery of a ring-shaped elastic part 20' such as thread-proof rubber, and it has the same construction as the series of concrete examples. be.

〔Effect of the invention〕

As described in 14 above, according to the present invention, the winding J is attached to the base I L.
[2 is installed, and the main rope 1 is connected to the main sheave 5 of this hoisting machine 2.
0, a car 11 is provided at one end 10a of the main rope 10, and a counterweight 16 is attached to the other end 10b of the main rope 10. Since the vibration absorbing mechanism 19 is provided on the rotating shaft 6,
The rotation unevenness of the main sheave 5 caused by the mis-meshing 2 between the worm 7 and the worm wheel 4 is prevented by the vibration absorbing rock t7h.
19, and reduce the imaging of the main sheave 5, which is the source of vibration of the car] 1 and the main rope 10, and remove the above-mentioned car 11.
The ride comfort can be improved.

[Brief explanation of drawings]

FIG. 1 is a side view of an elevator machine according to the present invention, FIG. 2 is a diagram showing another embodiment of the present invention, and FIG. 3 is a side view of an elevator machine according to the present invention.
The side views of the already proposed 1-degree elevator machine, FIGS. 4 and 5, are l+L dog views of the chain circle A section of FIG. 3. 1. Wiping machine, 2.. 5 piston machine, 4.. Worm wheel, 5.. 7 sheaves, 6.. Rotating shaft, 7.. Worm, 10. Main rope, ] 1.. Riding Basket, 16...Balance weight,]9...Vibration absorption mechanism, 20...Elastic member, 21...
... Weight. Applicant's agent: Sato -Male Fig. 1 Male Fig. 2

Claims (1)

[Claims] 1. A hoist is installed on a base, a main rope is wound around the main sheave of the hoist, a car is provided at one end of the main rope, and a car is installed on the main sheave of the hoist. 1. An elevator hoisting machine having a counterweight attached to an end thereof, characterized in that a vibration absorbing mechanism is provided on the rotating shaft of the main sheave. 2. The elevator hoisting machine according to claim 1, wherein the vibration absorbing mechanism has a weight attached to the free end of the elastic member. 3. The elevator hoisting machine according to claim 1, wherein the vibration absorbing mechanism includes a ring-shaped weight provided on the outer periphery of a ring plate-shaped elastic member.