JP2007284153A - Vibration-proof structure for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration-proof structure for an elevator capable of enhancing vibration-proofing performance without changing the structure at a large scale. <P>SOLUTION: In the vibration-proof structure for reducing transmission of vibration to a building side by supporting a vibration generation source 16 for generating vibration accompanying with lifting of a car 11 through elastic bodies 41, 42, the elastic body is made to the one in which a first elastic body 41 and a second elastic body 42 having different kinds are arranged in parallel. While ensuring load-resistant property by making spring constant of the first elastic body high, transmission of vibration from the vibration generation source to the support means can be reduced by making spring constant of the second elastic body low. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vibration-proof structure for an elevator, and more particularly, to a technique for preventing vibration generated in a hoisting machine, a deflecting sheave, and the like from propagating to a building side when a car is raised and lowered.

Conventionally, a so-called machine room-less elevator having no machine room above the hoistway has been developed.
For example, in the machine roomless elevator shown in FIG. 6, the car 1 is guided by a pair of left and right car side guide rails 2L and 2R to move up and down in the hoistway, and the counterweight 3 is a pair of left and right weight side guides. Guided by the rails 4L and 4R, the hoistway is raised and lowered.
Further, the hoisting machine 6 is supported by a hoisting machine support beam 5 spanned between the left guide rails 2L and 4L at the lower part of the hoistway through a vibration isolating rubber (not shown). Yes.
Further, a car-side deflecting sheave 8 and a weight-side deflecting sheave 9 are each provided with a vibration isolating rubber (not shown) on the sheave support beam 7 spanning the guide rails 2L, 4L, 4R at the top of the hoistway. Is supported through.
One of the main ropes 10 wound around the main sheave 6a that is rotationally driven by the hoisting machine 6 is wound around the car-side deflecting sheave 8 and the car-side sheaves 6a and 6b and is locked to the hitch portion 2a. The other is wound around the weight-side deflecting sheave 9 and the weight-side sheave 3a and locked to the hitch portion 7a (see Patent Document 1 below).

In the machine roomless elevator shown in FIG. 7, the car 11 is guided by a pair of left and right car side guide rails 12L and 12R to move up and down in the hoistway, and the counterweight 13 is a pair of front and rear weight side guide rails 14f. , 14r and ascend and descend in the hoistway.
Further, the hoisting machine 16 is supported on the hoisting machine support beam 15 spanned by the weight side guide rails 14f and 14r at the top of the hoistway through vibration-proof rubber (not shown).
One of the main ropes 18 wound around the main sheave 17 that is rotationally driven by the hoisting machine 16 is wound around the car sheaves 19L and 19R and locked to the hitch portion 12a, and the other is on the weight side. It is wound around the sheaves 13a and 13b and locked to the hitch portion 14a (see Patent Document 2 below).

On the other hand, FIG. 8 shows a conventional guide rail fixing structure, in which a building side bracket 21 is fixed to the inner wall surface (building) 20 of the hoistway by bolts 22, and a guide rail side bracket 24 is fixed to the guide rail 23. It is fixed by a clip 25 and a bolt nut 26.
The guide rails 23 are firmly fixed to the building by connecting both brackets together by welding or using bolts and nuts.

On the other hand, in the guide rail fixing structure shown in FIG. 9, the hoisting machine 31 is supported by the guide rail 32, and the guide rail side bracket 33 is formed in a U shape in plan view.
And the guide rail side bracket 33 is connected to the building side bracket 35 fixed to the inner wall surface (building) 34 of the hoistway through a vibration isolating rubber 36 (see Patent Document 3 below).

JP 2003-137487 A JP 2004-115161 A JP 2003-160285 A

By the way, in the above-described support structure for the hoisting machine, the deflecting sheave, and the guide rail, the vibration generated in the hoisting machine, the deflecting sheave, and the guide rail along with the lifting and lowering of the car and the counterweight is not propagated to the building side. Anti-vibration rubber is interposed in the middle of the vibration propagation path.
However, in order to withstand the load applied from the hoist or the deflector sheave, the spring constant of the anti-vibration rubber must be increased, and its natural frequency increases and low-frequency vibration propagates to the building side. There is a fear.

In order to solve this problem, a method of increasing the number of anti-vibration rubbers interposed to reduce the load load per anti-vibration rubber and reducing the natural frequency to improve the anti-vibration performance can be considered. .
However, in order to increase the number of interposed anti-vibration rubbers, the shape of the hoisting machine support beam, sheave support beam, guide rail bracket, etc. must be changed, and the redesign and dimensions of these structural parts must be made. Major structural changes such as changes, review of the arrangement structure, and equipment changes on the hoistway side will occur.

  Accordingly, an object of the present invention is to provide an anti-vibration structure for an elevator that can solve the above-described problems of the prior art and can improve the anti-vibration performance without a major structural change.

According to a first aspect of the present invention for solving the above-described problem, the vibration generated from the support means is supported by a support means via an elastic body that generates vibrations when the car is raised and lowered. Anti-vibration structure to reduce the propagation of
The elastic body is characterized in that a first elastic body and a second elastic body of different types are arranged in parallel.
The vibration generating source includes a hoisting machine, a deflecting sheave, and a guide rail, and the supporting means includes a hoisting machine supporting beam, a deflecting sheave supporting beam, a guide rail bracket, and the first and second The elastic body includes an anti-vibration rubber and a metal spring such as a coil spring, a disc spring, and a leaf spring.
Further, the first elastic body can be a metal spring and the second elastic body can be a vibration-proof rubber.
Furthermore, different types of metal springs can be combined, for example, the first elastic body is a disc spring and the second elastic body is a coil spring, and not only the combination of two types of springs but also three types of springs are combined. You can also.
In addition, the support means can be formed from a damping steel plate, or a damping paint can be applied to the support means.

That is, since the vibration isolating structure for an elevator according to claim 1 is provided with first and second elastic bodies of different types between the vibration generating source and the supporting means, the first elastic body It is possible to reduce the propagation of vibration from the vibration generating source to the support means by lowering the spring constant of the second elastic body while securing the load resistance by increasing the spring constant.
Further, by making the spring constants of the first and second elastic bodies different, it is possible to insulate the propagation of vibration from the vibration generating source to the support means over a wide frequency range.

Further, according to a sixth aspect of the present invention for solving the above-described problem, an elastic body is interposed between a pair of brackets for fixing the guide rail of the elevator to the building side, so that the building is separated from the guide rail. An anti-vibration structure that reduces the propagation of vibration to the side,
A spring constant adjusting means for adjusting a spring constant of the elastic body is provided.
When the elastic body is an anti-vibration rubber, the spring constant adjusting means includes a screw member that penetrates the pair of brackets and integrally connects the brackets, and the screw member and the pair of brackets. A plurality of anti-vibration rubbers having different spring constants may be combined.
In addition, when the elastic body is a metal coil spring, the spring constant adjusting means has a base end fixed to one of the pair of brackets and a distal end at a portion in the middle of the expansion / contraction direction of the coil spring. The engaging member can be engaged to change the effective number of turns.
In addition, the pair of brackets can be formed from a damping steel plate, or a damping paint can be applied to the pair of brackets.

That is, in the elevator vibration-proof structure described in claim 6, the spring constant of the elastic body interposed between the pair of brackets for fixing the elevator guide rail to the building can be adjusted by the spring constant adjusting means. It is what I did.
Thereby, the spring constant of an elastic body can be optimally adjusted according to the frequency of the vibration which wants to interrupt the propagation among the vibrations which propagate from a guide rail to the building side.

According to another aspect of the present invention, there is provided an anti-vibration device that reduces vibration propagation from a component by attaching an anti-vibration device to a support beam that supports the component of the elevator. Structure,
The support beam has a space capable of storing the vibration isolating means,
The anti-vibration means is attached to the support beam inside the space.
The components of the elevator are, for example, a hoisting machine, a car sheave, and a deflecting sheave, and the support beams that support these components are a hoisting machine support beam and a sheave support beam.
Moreover, a dynamic vibration absorber, a hood damper, and an active vibration damping device can be used as the vibration isolating means.
Furthermore, the support beam can be formed from a pair of beam members extending in parallel to each other with a gap between them, and a steel material having a space in the inside thereof is used like a cross-section C-shaped or U-shaped steel. You can also.

That is, the vibration isolating structure for an elevator according to claim 11 is one in which the vibration isolating means is mounted in the space inside the support beam that supports the hoisting machine, the sheave or the like.
Thereby, it is possible to arrange the vibration isolation means without affecting the arrangement of the hoisting machine and the sheave.
In addition, when vibration occurs in the hoisting machine or sheave due to the raising or lowering of the car or counterweight, the vibration can be attenuated in the supporting beam supporting the hoisting machine or sheave. Propagation of vibration to the car frame, guide rail, and building side can be reduced.

  As is apparent from the above description, according to the present invention, it is possible to provide a vibration isolating structure for an elevator that can improve the vibration isolating performance without a large structural change.

Hereinafter, with reference to FIG. 1 thru | or FIG. 5, each embodiment of the vibration-proof structure of the elevator which concerns on this invention is described in detail.
In the following description, the same reference numerals are used for the same parts including the above-described prior art, and a duplicate description is omitted.

1st Embodiment First, with reference to FIG. 1 and FIG. 2, the vibration-proof structure of the elevator of 1st Embodiment is demonstrated.

The elevator vibration isolation structure 40 shown in FIG. 1 is an improvement of the vibration isolation structure of the hoisting machine 16 in the elevator shown in FIG. 7, and includes a base 16a of the hoisting machine 16, a hoisting machine support beam 15, and the like. In between, a coil spring 41 as a first elastic body and an anti-vibration rubber 42 as a second elastic body are interposed in parallel.
The coil spring 41 and the vibration isolating rubber 42 can be disposed in an existing space between the base 16a of the hoisting machine 16 and the hoisting machine support beam 15, so that the hoisting machine 16 and the hoisting machine There is no need to change the shape, structure, or dimensions of the support beam 15.

At this time, the spring constant of the anti-vibration rubber 42 as the second elastic body is lowered while the load constant is secured by increasing the spring constant of the coil spring 41 as the first elastic body. As shown in FIG. 2, a transfer function having two types of frequency bands can be obtained.
Thereby, propagation of vibration from the hoisting machine 16 as the vibration generating source to the hoisting machine support beam 15 as the supporting means can be insulated in a wide range from a low frequency to a high frequency.
One method is to lower the spring constant of the coil spring 41 as the first elastic body and to increase the spring constant of the anti-vibration rubber 42 as the second elastic body.

In addition to the coil spring, the first elastic body 41 may be a metal spring such as a disc spring or a laminated leaf spring.
In addition, a metal spring can be used for both the first and second elastic bodies 41 and 42.
Furthermore, it is not limited to 2 types of elastic bodies, For example, it can use combining 3 types of elastic bodies.
Furthermore, in the elevator shown in FIG. 6, a similar vibration-proof structure can be adopted for the portion that supports the sheaves 8 and 9 by swinging with the sheave support beam 7.
In addition, by forming the base 16a of the hoisting machine 16, the hoisting machine support beam 15, and the sheave support beam 7 from a vibration-damping steel plate, or applying a vibration-damping paint, the hoisting machine 16, the deflecting sheave 8, The propagation of vibration from 9 to the building side can be further better insulated.

2nd Embodiment Next, with reference to FIG. 3, the vibration-proof structure of the elevator of 2nd Embodiment is demonstrated.

The elevator vibration isolation structure 50 shown in FIG. 3 is an improvement of the guide rail vibration isolation support structure shown in FIG. 8, and the first bracket 51 is attached to the guide rail 23 by a rail clip (not shown). Yes.
Further, a second bracket 53 is integrally fixed to a fastener 52 fixed to the inner wall surface (building) 20 of the hoistway by welding or the like.

A first anti-vibration rubber plate 55 is interposed between the first and second brackets 51, 53 through which the screw member 54 penetrates in the horizontal direction, and the head 54a of the screw member 54 and the second bracket are inserted. A second anti-vibration rubber plate 56 is interposed between the first nut 51 and a double nut 54 b screwed into the screw member 54 and the first bracket 51. Is intervening.
Accordingly, the guide rail 23 is elastically supported by the building 20 in a vibration-proof manner.

At this time, by changing the spring constants of the first to third anti-vibration rubber plates 55, 56, and 57, the entire spring constant of the anti-vibration rubber plate can be easily changed.
Further, by adjusting the tightening degree of the screw member 54 and the double nut 54b, the entire spring constant of the vibration-proof rubber plate can be easily adjusted.
The second bracket 53 is welded to the fastener 52 on the building 20 side after the first to third vibration-proof rubber plates 55, 56, 57 are attached and the tightening degree of the screw member 54 and the double nut 54b is adjusted. Alternatively, it may be fixed integrally with a screw member (not shown).

That is, according to the vibration isolating structure 50 of the second embodiment, the spring constant for elastically isolating and supporting the guide rail 23 with respect to the building 20 can be easily adjusted.
In other words, the first to third anti-vibration rubber plates 55, 56, 57 and the screw member 54 constitute a spring constant adjusting means.
Further, the vibration isolating structure 50 can resist the shearing force of the screw member 54 when receiving a horizontal load in a direction perpendicular to the illustrated paper surface when an earthquake occurs.
Furthermore, the vibration isolating structure 50 can insulate the vibration generated in the hoist 16 in two stages by using it together with the part of the anti-vibration structure 40 that supports the hoist 16 shown in FIG. Therefore, it is possible to reliably insulate the propagation of the vibration generated in the hoist 16 to the building 20 side.
In addition, by forming the first and second brackets 51 and 53 from a vibration-damping steel plate or applying a vibration-damping paint, the propagation of vibration from the guide rail 23 to the building 20 side is further better insulated. be able to.

3rd Embodiment Next, with reference to FIG. 4, the vibration-proof structure of the elevator of 3rd Embodiment is demonstrated.

The elevator vibration isolation structure 60 shown in FIG. 4 is a structure that elastically supports the guide rail 23 against the building 20 in the same manner as the elevator vibration isolation structure 50 of the second embodiment described above. The first bracket 61 is attached to the guide rail 23 by a rail clip (not shown).
A second bracket 63 is integrally fixed to a fastener 62 fixed to the inner wall surface (building) 20 of the hoistway by welding or the like.

A coil spring 65 is interposed between the first and second brackets 61, 63 through which the screw member 64 penetrates in the horizontal direction, and between the head 64 a of the screw member 64 and the second bracket 63. A fourth anti-vibration rubber plate 66 is interposed, and a fifth anti-vibration rubber plate 67 is interposed between the double nut 64 b screwed into the screw member 64 and the first bracket 67. Yes.
Accordingly, the guide rail 23 is elastically supported by the building 20 in a vibration-proof manner.

At this time, an engaging member 68 that engages with a portion 65 a in the expansion / contraction direction of the coil spring 65 is fixed to the upper end portion of the vertical wall portion 63 a of the second bracket 63.
The engaging member 68 transmits the reaction force of the coil spring 65 to the second bracket 63 by engaging the front end of the engaging member 68 with the intermediate portion 65 a of the coil spring 65.
Thus, the spring constant of the coil spring 65 is changed by changing the value of the distance S between the first bracket 61 and the intermediate portion 65a of the coil spring 65, in other words, the value of the effective number of turns of the coil spring 65. Can be adjusted.

Further, by changing the spring constants of the fourth and fifth vibration isolating rubber plates 66 and 67, the overall spring constant of the vibration isolating structure 60 can be easily changed.
Further, by adjusting the tightening degree of the screw member 64 and the double nut 64b, the entire spring constant of the vibration-proof rubber plate can be easily adjusted.

That is, in the vibration isolating structure 60 of the third embodiment, the coil spring 65, the engaging member 68, the fourth and fifth vibration isolating rubber plates 66 and 67, and the screw member 64 constitute spring constant adjusting means. Thus, the spring constant for elastically supporting the guide rail 23 with respect to the building 20 can be easily adjusted.
Note that the attachment of the fourth and fifth vibration-proof rubber plates 66 and 67, the adjustment of the tightening degree of the screw member 64 and the double nut 64b, and the adjustment of the engagement position of the engagement member 68 and the coil spring 65 are completed. After that, the second bracket 63 may be welded to the fastener 62 on the building 20 side or fixed integrally with a screw member (not shown).

Further, the second bracket 63 and the engaging member 68 can be integrally welded and fixed, but by using a screw member screwed to both, the value of the effective number of turns of the coil spring 65 can be easily obtained. Can be adjusted.
In addition, by forming the first and second brackets 61 and 63 from a damping steel plate or applying a damping paint, the propagation of vibration from the guide rail 23 to the building 20 side is further better insulated. be able to.

4th Embodiment Next, with reference to FIG. 5, the vibration-proof structure of the elevator of 4th Embodiment is demonstrated.

The elevator vibration isolating structure 70 shown in FIG. 5 is for isolating the sheave support beam 19 that supports the pair of left and right car sheaves 19L and 19R in the elevator shown in FIG.
The sheave support beam 19 is formed of a pair of beam members 19a and 19b extending in parallel to each other with a gap between them, and a thin plate is provided in the vicinity of the car sheaves 19L and 19R inside the space 19c therebetween. -Shaped dynamic vibration absorbers 71 and 71 are respectively disposed.

These thin plate-like dynamic vibration absorbers 71 and 71 are thin steel plates bent in an inverted L shape with a cross-sectional shape, and the vertical wall portion 71a is closely fixed to the vertical wall surfaces of the beam members 19a and 19b. .
Further, the horizontal wall portion 71b has a plate thickness and a shape so as to have a natural frequency equal to the frequency of the vibration generated in the sheave support beam 19 by the rotation of the car-side sheaves 19L and 19R when the car 11 is raised and lowered. Is set.
As a result, the vibration energy generated in the sheave support beam 19 as the car 11 moves up and down is canceled by the resonance of the horizontal wall portions 71b of the thin plate-like dynamic vibration absorbers 71 and 71. The vibration propagating to the upper beam 11a is reduced, the vibration and noise inside the car 11 are reduced, and the comfort is improved.

That is, since the vibration isolating structure 70 for the elevator according to the fourth embodiment has the thin plate-like dynamic vibration absorbers 71 and 71 mounted in the space 19c of the sheave support beam 19, a pair of left and right car-side sheaves 19L. , 19R and the arrangement of the upper beam 11a of the car frame is not affected.
In addition, since the dynamic vibration absorbers 71 and 71 can be disposed in the vicinity of the pair of left and right car sheaves 19L and 19R, vibration generated in the pair of left and right car sheaves 19L and 19R as the car 11 is raised and lowered. It can be attenuated before propagating to the upper beam 11a of the car frame.
Furthermore, since the shapes of the dynamic vibration absorbers 71 and 71 can be freely set inside the space 19c of the sheave support beam 19, the vibration generated in the sheave support beam 19 can be reliably damped.
Note that the number of the dynamic vibration absorbers 71 and 71 can be increased, and a hood damper or an active vibration damping device can be provided in place of the dynamic vibration absorbers 71 and 71.
Further, a support beam for supporting the hoisting machine 16 can be formed in the same manner, and these vibration isolating means can be mounted in the space inside.

As mentioned above, although each embodiment of the vibration isolator structure of the elevator which concerns on this invention was described in detail, it cannot be overemphasized that this invention is not limited by embodiment mentioned above and a various change is possible.
For example, the above-described embodiments have been described by taking a machine roomless elevator as an example, but it goes without saying that the present invention can also be applied to an elevator having a machine room.

The side view which shows typically the vibration proof structure of the elevator of 1st Embodiment. The graph which shows the transfer function obtained in the vibration proof structure shown in FIG. Sectional side view which shows the vibration-proof structure of the elevator of 2nd Embodiment. Sectional side view which shows the vibration-proof structure of the elevator of 3rd Embodiment. Sectional side view which shows the vibration-proof structure of the elevator of 4th Embodiment. The perspective view which shows the machine room less elevator described in Unexamined-Japanese-Patent No. 2003-137487. The perspective view which shows the machine roomless elevator described in Unexamined-Japanese-Patent No. 2004-115161. The figure which shows the anti-vibration structure described in Unexamined-Japanese-Patent No. 2003-160285. The (a) side view and (b) top view which show the vibration proof structure described in Unexamined-Japanese-Patent No. 2003-160285.

Explanation of symbols

11 Car 14 Guide rail 15 Hoisting machine support beam 16 Hoisting machine 17 Main sheave 18 Main rope 19 Sheave support beam 19a, 19b Beam member 19c Space 19L, 19R Car side sheave
20 Inner wall of the hoistway (building)
23 Guide rail 40 Anti-vibration structure for elevator according to first embodiment 41 Coil spring (first elastic body)
42 Anti-vibration rubber (second elastic body)
50 Antivibration Structure for Elevator of Second Embodiment 51 First Bracket 52 Fastener on Building Side 53 Second Bracket 54 Screw Member 55, 56, 57 Antivibration Rubber Plate 60 Antivibration Structure for Elevator of Third Embodiment 61 1st bracket 62 Building-side fastener 63 2nd bracket 64 Screw member 65 Coil spring 66, 67 Anti-vibration rubber plate 68 Engaging member 70 Anti-vibration structure of elevator according to fourth embodiment 71 Thin plate-like dynamic vibration absorber

Claims (12)

A vibration-proof structure that reduces propagation of vibration from the support means by supporting a vibration generation source that generates vibration when the car is raised and lowered to the support means via an elastic body,
A vibration-proof structure for an elevator, wherein the elastic body is a structure in which a first elastic body and a second elastic body of different types are arranged in parallel.   2. The vibration-proof structure for an elevator according to claim 1, wherein the first elastic body is a vibration-proof rubber and the second elastic body is a metal spring.   The vibration isolating structure for an elevator according to claim 1, wherein the first elastic body and the second elastic body are different types of metal springs.   The vibration-proof structure for an elevator according to any one of claims 1 to 3, wherein the supporting means is formed from a vibration-damping steel plate.   The vibration-damping structure for an elevator according to any one of claims 1 to 4, wherein a vibration-damping paint is applied to the support means. An anti-vibration structure that reduces the propagation of vibration from the guide rail to the building side by interposing an elastic body between a pair of brackets for fixing the guide rail of the elevator to the building side,
A vibration isolating structure for an elevator, comprising spring constant adjusting means for adjusting a spring constant of the elastic body. The elastic body is an anti-vibration rubber;
And the spring constant adjusting means is
A screw member that penetrates the pair of brackets and integrally connects the brackets;
The vibration isolating structure for an elevator according to claim 6, wherein a plurality of vibration isolating rubbers having different spring constants interposed between the screw member and the pair of brackets are combined. . The elastic body is a metal coil spring;
And the spring constant adjusting means is
The proximal end is fixed to one of the pair of brackets, and the distal end is an engaging member that engages with a middle portion of the coil spring in the expansion / contraction direction to change the effective number of turns. The elevator vibration-proof structure according to claim 6.   The vibration-proof structure for an elevator according to any one of claims 6 to 8, wherein the bracket is formed from a vibration-damping steel plate.   10. The vibration-proof structure for an elevator according to claim 6, wherein the bracket is coated with a vibration-damping paint. An anti-vibration structure that reduces the propagation of vibrations from the component by attaching anti-vibration means to a support beam that supports the component of the elevator,
The support beam has a space capable of storing the vibration isolating means,
And the said vibration isolating means is attached to the said support beam inside the said space, The vibration isolating structure of the elevator characterized by the above-mentioned.   12. The vibration-proof structure for an elevator according to claim 11, wherein the vibration-proof means is a thin plate-like dynamic vibration absorber that is fixed to the support beam and vibrates integrally within the space.

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