JP2001039657A - Hoist, elevator, and vibration and noise reducing method for hoist in elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid resonance with a building and effectively reduce the noise by providing a hoist body and a reinforcing member capable of changing the natural frequency of the hoist body and having fastening counterparts in an elevator arranging the hoist comprising a drive in a hoistway. SOLUTION: A hoist 17 has a traction sheave and a reinforcing member 17c attached to a face of a hoist body 17b in a side facing to a hoistway. The reinforcing member 17c is a cross-shaped plate body having four arms 21a-12d and attached to the hoist body 17b on fastening counterparts 22 formed in the tips of the respective arms. In operating the elevator, when the vibration noise of the hoist 17 coincides with the natural frequency of the building or the frequency in the hoistway easy to be amplified, bolts are inserted into the respective fastening counterparts 22 of the respective arms 21a-21c and respective fastening holes 23, 26 of the respective fastening counterparts 25 of the hoist body 17b, and nuts are installed to change the rigidity of the whole hoist 17 body, thereby avoiding the resonance of the building and reducing the noise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoist, an elevator, and a method of reducing vibration noise of the hoist in an elevator.

[0002]

2. Description of the Related Art In general, in a rope-type elevator, a machine room for installing a hoist and the like is formed at the top of a hoistway on which a car or the like moves up and down. However, since the machine room is provided on the roof of a building, the appearance of the building may be impaired, and problems such as the right to sunshine may occur.

Therefore, there has been proposed an elevator in which a hoisting machine or the like is disposed in the hoistway by making good use of the space in the hoistway and does not require a special machine room as in the prior art.

FIGS. 10 and 11 show a schematic configuration of an elevator in which the machine room is not required and a hoist is installed in a gap between a hoistway wall at the top of a hoistway and a projection surface of a car. A pair of left and right main guide rails 2 (only one of which is shown in the figure) for a car is provided on the inner wall of the hoistway 1.
And a pair of left and right auxiliary guide rails 3,
A car 4 is engaged with the main guide rail 2 so as to be able to move up and down along the main guide rail 2, while a counterweight 5 is attached to the auxiliary guide rails 3 and 3. It is engaged so as to be able to move up and down along 3,3.

A beam 6 extending in the horizontal direction is provided above the two auxiliary guide rails 3 and 3 for guiding the counterweight 5, and a hoisting machine 7 and a speed governor 8 are mounted on the beam 6. is set up. Traction sheave 7a of hoisting machine 7
Has a suspension rope 9 wound around it.
Is suspended downward by a turning sheave 10 provided at a lower part of the car 4 and extends upward, and a rope hitch 11 for a car provided at an upper part of the hoistway 1 is provided.
It is connected and held. The other end of the suspension rope 9 is wound around a turning sheave 12 provided on the counterweight 5, and its end is connected to and held by a rope hitch 13 for the counterweight.

When the hoisting machine 7 is driven and the car 4 is lifted by the suspending rope 9, the counterweight 5
Is lowered.

[0007]

However, in the elevator as described above, the hoisting machine 7 constituting the driving device is used.
Is disposed in the hoistway 1, so that the hoisting machine is more likely to transmit the vibration noise generated from the hoisting machine 7 to the car 4 than the elevator provided in the machine room. is there. Further, since the hoisting machine 7 is disposed in the hoistway 1, when the wavelength of the noise generated by the hoisting machine 7 or an integral multiple of the wavelength matches the width dimension of the hoistway 1, the noise is amplified. Could be done.

Therefore, when the vibration noise of the hoisting machine 7 coincides with the natural frequency of the building or the frequency which is easily amplified in the hoistway 1, measures against the noise such as providing a cover for covering the hoisting machine 7 are taken. It has been implemented.

[0009] However, in the above noise countermeasures,
In order to reduce noise, it is necessary to cut off the noise propagation path from the hoisting machine 7 to the car 4, and the size of the cover needs to be at least as large as the hoisting machine 7,
In addition, when the hoist 7 is completely covered by the cover, there is a problem that a measure against the temperature rise of the hoist 7 is required.

In view of the above, the present invention does not cut off the noise propagation path but changes the natural frequency of the hoist to avoid resonance with the building and to reduce the noise. An object of the present invention is to provide a method for reducing vibration noise of a hoist, an elevator, and a hoist in an elevator.

[0011]

The invention according to claim 1 is
A hoisting machine body, and a reinforcing member having a portion to be fastened that is capable of changing the natural frequency of the hoisting machine body by being fixed to the hoisting machine body attached to the hoisting machine body, A hoist comprising:

According to a second aspect of the present invention, there is provided a hoist main body having a flat structure, and the hoist main body attached to one axial side of the hoist main body and fixed to the hoist main body. And a reinforcing member having a fastened portion capable of changing the natural frequency of the hoisting machine.

The invention according to claim 3 is the invention according to claim 1 or 2
The hoist described above, wherein an elastic body is interposed between the portion to be fastened of the reinforcing member and the main body of the hoist.

According to a fourth aspect of the present invention, a car that moves up and down along a main guide rail provided in a hoistway and a balance that moves up and down along an auxiliary guide rail provided in the hoistway are provided in the hoistway. In an elevator that hangs on both sides of a hanging rope wound on a hoist installed on a hoisting machine and drives a car and a counterweight by the hoisting machine,
An elevator using the hoist according to any one of claims 1 to 3 as the hoist.

According to a fifth aspect of the present invention, in the elevator according to the fourth aspect, after the elevator is installed, the fastening portion of the reinforcing member previously attached to the main body of the hoist is fixed to fix the natural vibration of the hoist. This is a method for reducing vibration and noise of a hoist in an elevator, characterized by changing the number.

According to a sixth aspect of the present invention, after the elevator is installed, a reinforcing member is attached to the main body of the hoist, and a portion to be fastened of the reinforcing member is fixed to the main body of the hoist so that the natural frequency of the hoist can be increased. The vibration noise reduction method of the hoist in the elevator characterized by changing

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that FIG.
The same parts as those described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a view showing a schematic configuration of an elevator according to the present invention. A hoisting machine 17 is disposed on a beam 6 provided on the top of auxiliary guide rails 3 and 3, and this hoisting machine is provided. 1
7 is configured by attaching a traction sheep 17a and a reinforcing member 17c to a hoisting machine main body 17b. The hoisting machine main body 17b has a flat structure in which the axial length is shorter than the radial length, and one side in the axial direction, that is, the hoistway 1
The traction sheave 17a and the reinforcing member 17c are attached to the surface on the side facing inward. A hoisting machine body having a flat structure is disclosed in, for example, Japanese Patent No. 2593288.

As shown in FIG. 2, the reinforcing member 17c has four arms 21a, 21b, 21 extending in the radial direction.
c, a cross-shaped plate having 21 d
a, 21b, 21c, 21d, the hoisting machine body 17
A fastened portion 22 bent at a right angle to the direction b is formed, and a fastened hole 23 for inserting a bolt is provided in each fastened portion 22 of the upper and left and right arms 21a, 21b, 21c. ing. Further, the downwardly extending arm portion 21d is fixed to a lower portion of the front surface of the hoisting machine main body 17b by a screw 24,
Thereby, the reinforcing member 17c is attached to the hoisting machine main body 17b.

On the other hand, the upper and left and right arms 21a, 21a of the reinforcing member 17c are attached to the hoisting machine main body 17b.
At a position facing each of the fastened portions 22b and 21c at a predetermined interval, a fastened portion 25 capable of fixing the fastened portion 22 is protrudingly provided. Is
A fastening hole 26 is provided on the same axis as the fastening hole 23 of each of the parts 22 to be fastened. As will be described later, the fastening holes 26 and the fastening holes 23 are inserted through bolts and screwed together with nuts to connect the fastened portions 22 to the hoisting machine main body 17.
b.

However, in the initial state where the elevator is installed on site and the hoisting machine 17 is arranged in the hoistway 1,
As shown in FIG. 2, no bolt is inserted into the fastening holes 23 of the respective fastening portions 22 of the reinforcing member 17 c and the fastening holes 26 of the respective fastening portions 25 of the hoisting machine main body 17. And 25 are not connected.

Therefore, when operating the elevator,
When the vibration noise of the hoisting machine 17 matches the natural frequency of the building or the frequency that is easily amplified in the hoistway 1, as shown in FIG. The fastening portion 22 of the reinforcing member 17c is fixed to the hoisting machine main body 17b by inserting the bolt 27 and mounting the nut 28. Thereby, the rigidity of the entire hoisting machine 17 changes, and as shown in FIG. 4, the natural frequency of the hoisting machine 17 is changed with respect to the state before the fixed portions 22 of the reinforcing member 17c are fixed. Can be avoided, and resonance with the building can be avoided to reduce noise. In the initial state where the fastened portions 22 and 25 are not connected to each other, as shown in FIG. 5, the winding between the fastened portion 25 of the hoisting machine main body 17b and the fastened portion 22 of the reinforcing member 17c is performed. A gap S is provided to such an extent that they do not collide with each other due to the vibration of the upper machine 17.

Therefore, even when the hoisting machine 17 is driven in this initial state, the parts 25 and 22 to be fastened do not collide with each other due to the vibration of the hoisting machine 17, thereby preventing the generation of chatter noise. be able to.

On the other hand, when the fastened portion 25 of the hoisting machine main body 17b and the fastened portion 22 of the reinforcing member 17c are connected and fixed, as shown in FIG.
, And the two can be connected by a bolt 27 and a nut 28. Also in this case, the hoist 1
7 can be changed to reduce the generation of noise.

When a gap is formed between the fastened portions 25 and 22, an elastic body 30 may be interposed in the gap as shown in FIG. In this case, the contact between the hoisting machine main body 17b and the reinforcing member 17c at the time of occurrence of vibration is prevented by the elastic body 30, the occurrence of chatter can be prevented, and the gap between them can be reduced. Can also.

Further, as shown in FIG.
b or the fastened portion 22 of the reinforcing member 17c
The female screw 31 is provided in either one of the two (in the figure, the to-be-fastened portion 25), and when the two are fastened and fastened, the bolt 27 is simply screwed into the above-mentioned female screw 31 and the reinforcing member 17c is fastened to the hoisting machine main body 17b. The part 22 can be fixed. Further, as shown in FIG. 9, the fastened portion 2 of the hoisting machine main body 17b.
The male screw 32 may be provided upright on one of the fastening portions 22 of the reinforcing member 17c (the fastening portion 25 in the figure). In this case, the other fastening hole is fitted into the male screw 32, and the nut 28 is screwed onto the male screw 32 to fix the fastened portion 22 of the reinforcing member 17c to the hoisting machine body 17b. be able to. In addition, even when a force is applied to the reinforcing member 17c in a direction perpendicular to the male screw 32, the male screw 32 can be made to act as a stopper.

In the above-described embodiment, the reinforcing member 17c is previously attached to the hoisting machine body 17b. However, the reinforcing member 17c is installed after the elevator is installed.
Can be attached. In this case, as shown in FIG. 2 and the like, the hoisting machine main body 17b has a flat structure, a reinforcing member 17c is arranged on one side in the axial direction, and the fastened portion 22 of the reinforcing member 17c is connected to the hoisting machine main body 17b. By making it possible to attach the reinforcing member 17c to the hoisting machine main body 17b after installation on site, the fastening and release of the fastening may be performed.

In the above-described embodiment, the case where the hoist is installed in the upper part of the hoistway has been described. However, the present invention relates to the case where the hoist is installed in the lower part of the hoistway as in a so-called pit-place type. The same can be applied to.

[0029]

As described above, according to the present invention, the reinforcing member having the fastened portion capable of changing the natural frequency of the hoisting machine body is attached to the hoisting machine body. When the vibration noise of the hoist matches the natural frequency of the building or the frequency that is easily amplified in the hoistway, the above-mentioned fastened portion can be easily fixed to the main body of the hoist, and the state before the fixation. The natural frequency of the main body of the hoist can be changed. Therefore, resonance with the building can be avoided and noise can be reduced.

Further, the reinforcing member can be attached to the main body of the hoist after the elevator is installed on site, so that the vibration noise of the hoist after the elevator is installed on site can be easily reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an elevator according to the present invention.

FIG. 2 is a perspective view showing a hoist provided in the elevator of FIG.

FIG. 3 is a partial cross-sectional view of a fastening portion showing a state where a fastened portion of a reinforcing member is fastened to a fastened portion of the hoisting machine main body.

FIG. 4 is a diagram showing a change in noise characteristics of a hoist.

FIG. 5 is a partial view showing an embodiment of a fastening portion.

FIG. 6 is a sectional view of a fastening portion between the hoisting machine main body and the reinforcing member in the embodiment of FIG. 5;

FIG. 7 is a diagram showing another embodiment of a fastening portion.

FIG. 8 is a view showing still another embodiment of the fastening portion.

FIG. 9 is a view showing another embodiment of a fastening portion.

FIG. 10 is a diagram showing a schematic configuration of a conventional elevator.

FIG. 11 is a plan sectional view showing a schematic configuration of a conventional elevator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoistway 2 Main guide rail 3 Auxiliary guide rail 4 Riding car 5 Balancing weight 7, 17 Hoisting machine 9 Suspension rope 17b Hoisting machine main body 17c Reinforcement member 22 Fastened part 23, 26 Fastened hole 25 Fastened part 30 Elastic body 31 Female thread 32 Male thread

Claims (6)

[Claims] 1. A hoisting machine main body, and a fastened portion which is attached to the hoisting machine main body and fixed to the hoisting machine main body, whereby a natural frequency of the hoisting machine main body can be changed. And a reinforcing member having: 2. A hoisting machine main body having a flat structure, and a natural frequency of the hoisting machine main body is changed by being attached to one axial side of the hoisting machine main body and being fixed to the hoisting machine main body. And a reinforcing member having a portion to be fastened. 3. The hoist according to claim 1, wherein an elastic body is interposed between the fastened portion of the reinforcing member and the main body of the hoist. 4. A hoist installed in a hoistway, wherein a car that moves up and down along a main guide rail provided in the hoistway and a balance that moves up and down along an auxiliary guide rail provided in the hoistway are provided. Hanging on both sides of the hanging rope wrapped around the machine,
4. An elevator in which a car and a counterweight are driven up and down by the hoist, wherein the hoist according to claim 1 is used as the hoist. 5. After the elevator is installed, a portion to be fastened of a reinforcing member previously attached to the hoisting machine main body is fixed to the hoisting machine main body to change the natural frequency of the hoisting machine. The method for reducing vibration and noise of a hoist in an elevator according to claim 4. 6. The elevator according to claim 1, wherein a reinforcing member is attached to the main body of the hoist after the elevator is installed, and a portion to be fastened of the reinforcing member is fixed to the main body of the hoist to change the natural frequency of the hoist. 5. The method for reducing vibration and noise of a hoist in an elevator according to claim 4.