JP2770127B2 - Vibration control structure of mechanical parking equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a vibration damping structure of a mechanical parking facility, and more particularly to a vibration damping measure in a case where a steel structure vibrates with a base portion as a node and an upper portion as a belly.

[0002]

2. Description of the Related Art FIGS. 13 and 1 show mechanical parking facilities.
As shown in FIG. 4, there is known one in which a parking device is installed in a parking tower 101 erected on the ground. Parking tower 101
, A plurality of columns 103, 103,...
, And a plurality of diagonal members 107, 107,..., And an outer wall 111 attached to the outer surface of the steel structure 109. The receiving beams 10 are provided at two opposing positions on the upper part of the steel structure 109.
5a, 105a are erected, and the two receiving beams 105a, 105a
When a driving device 113 is installed to drive a parking device in the vehicle, for example, to circulate a pallet for mounting on a vehicle, the driving device 113 serves as a vibration source and serves as a vibration source.
9 is forcibly vibrated, and the steel structure 109 is attached to the outer wall 11.
1 is vibrated. The outer wall 111 acts as a diaphragm, vibrating the atmosphere to generate low-frequency sound, and a building 115 such as a building or an apartment adjacent to the mechanical parking facility may vibrate.

[0003] One of the vibration modes of the steel structure 109 is a vibration mode in which the base part 119 is a node and the upper part is an antinode (see phantom lines in FIGS. 13 and 14). The natural frequency of this vibration mode is approximately 2 to 4 Hz, depending on the height of the steel structure 109, and the low-frequency sound generated from the outer wall 111 also includes this frequency component. Therefore, the natural frequency in the adjacent building 115 such as a building is 2-4.
If there is something that is at Hz and vibrates very easily at this frequency, the low-frequency sound will sway.

Conventionally, the following measures have been taken to solve the problem of shaking of a building due to such low-frequency sound. That is, the driving speed of the parking device is reduced to reduce the vibration of the steel structure.

[0005] A steel structure for supporting the outer wall is newly separated and independent from the steel structure supporting the parking device, so that the vibration of the inner steel structure is not transmitted to the outer steel structure. 4-330177).

[0006]

However, in the above-mentioned conventional method, since the parking device is operated slowly, it takes a long time to enter and exit the parking lot, resulting in poor entrance / exit efficiency.

[0007] In the latter method, since the steel structure is provided inside and outside, a large site area must be ensured by that amount, which is not a good idea at present when land prices are soaring. Further, such a double steel structure is very difficult to apply to existing mechanical parking facilities.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and an object of the present invention is to provide a proper natural frequency when a steel structure vibrates with a base part as a node and an upper part as an antinode. By installing the member with the appropriate position, the vibration of the steel structure that causes the vibration of the building can be effectively suppressed without lowering the warehouse entrance / exit efficiency and increasing the site area, and low frequency sound To solve the problem.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a steel structure supporting a parking device, and a driving device for driving the parking device installed on an upper portion thereof. The following solutions were applied to the vibration damping structure of a mechanical parking facility in which the body vibrates with the base as a node and the upper part as a belly.

That is, a solution of the present invention is to provide a dynamic vibration absorbing means at at least one location above the steel structure. Then, as this dynamic vibration absorbing means, one having a mass body and an elastic body interposed between the mass body and the steel frame structure to support the mass body to the steel frame structure is adopted. Also,
The dynamic vibration absorbing means has a natural frequency substantially equal to the natural frequency of the steel structure, and absorbs the vibration of the steel structure. Further, the mass body of the dynamic vibration absorbing means is supported on the steel structure by a silicon damper. The silicon damper is characterized in that a damping force is generated by viscous resistance caused by the horizontal vibration of the mass body, and the vibration energy of the steel structure is attenuated.

[0011]

With the above arrangement, according to the solution of the present invention, the vibration having the base part of the steel structure as a node and the upper part as an antinode is absorbed by the dynamic vibration absorbing means having substantially the same natural frequency as the steel structure. Therefore, the resonance of the steel structure at the natural frequency is prevented, the vibration of the natural vibration mode having the base portion as a node and the upper portion as an antinode is suppressed, and low-frequency sound pollution is prevented.

Further, since the dynamic vibration absorbing means is provided on the upper part of the steel structure, that is, on the antinode with a large amplitude,
The vibration of the steel structure is more effectively suppressed.

Further, since the vibration of the steel structure is suppressed by the provision of the dynamic vibration absorbing means, the driving speed of the parking device does not have to be reduced as a measure for damping vibration, so that it does not take much time to enter and exit the parking lot, and the entrance and exit efficiency is reduced. Does not decrease. In addition, two steel structures
It is not necessary to have a heavy structure, and there is no need to secure a large site area. Furthermore, since it is only necessary to install the dynamic vibration absorbing means, it can be easily applied to existing mechanical parking facilities.

In addition, since the vibration of the steel structure is transmitted to the mass of the dynamic vibration absorbing means via the silicon damper, the vibration energy of the steel structure is more effectively attenuated by the silicon damper during this time. In addition, the silicon damper generates a damping force due to viscous resistance generated by the horizontal vibration of the mass body, thereby suppressing vibration in a wide range of frequencies including the natural frequency of the steel structure.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show a vertical circulation parking facility as a mechanical parking facility to which a vibration damping structure according to one embodiment of the present invention is applied. This vertical circulation type parking facility includes a rectangular parallelepiped parking tower T and a parking device 3 provided in the parking tower T. The parking tower T includes a steel structure 1 installed on the ground, and the steel structure 1 is provided between a plurality of columns 5, 5,... And two adjacent left and right columns 5, 5. , And a plurality of upper and lower beams 7, 7,..., And diagonal members 9, 9, which are installed diagonally between two adjacent upper and lower beams 7, 7, and are constructed as described above. The device 3 is the steel structure 1
It is supported by. The parking tower T has an outer wall 13, which is attached to the steel structure 1 via the vertical rim 11 (see FIG. 2).

The parking device 3 is provided with a pair of upper and lower sprockets 15, 15, which are installed in front and rear of the parking tower T at upper and lower positions closer to the upper end and lower end, respectively. Endless chain 17
Are hung on the front and rear two endless chains 17, 17 by a plurality of attachments 19, 19,.

As shown in FIG. 3, on the upper part between two adjacent right and left columns 5, 5 of the steel structure 1, receiving beams 7a, 7a are provided.
Are arranged one by one so as to face each other in front and rear.
a and 7a include a driving device 23 for driving the parking device 3;
Is installed. .. Are transmitted to the upper sprocket 15 to circulate the cages 21, 21,... Vertically in a vertical plane by chain driving. In addition, the steel structure 1 is configured to vibrate by driving the driving device 23 with the base portion 29 as a node and an upper portion near the installation position of the driving device 23 as an antinode (see FIG. 14). The resonance curve of the vibration or low-frequency sound of the steel structure 1 at this time is shown by the solid line in FIG. The natural frequency of the vibration mode of the steel structure 1 is f and has a peak M.

As one of the features of the present invention, a total of four dynamic vibration absorbers 31 as dynamic vibration absorbing means are installed on the front and rear receiving beams 7a, 7a at the upper part of the steel structure 1,
As shown in detail in FIGS. 11 and 12, each of the dynamic vibration absorbers 31 is provided with a mass body 37, and a support beam 7a of the mass body 37 and the steel frame structure 1 (actually, provided on the support beam 7a). And a rectangular annular rubber elastic body 39 interposed between the mounting plate 40) and the mass body 37 supported by the receiving beam 7a.

The mass body 37 includes a plurality of weight plates 43, 43,... Stacked vertically and a plurality of mass adjustment liners 45, 45,. , 41,... Are configured in a block shape, and the mass of the mass body 37 is finely adjusted by changing the number of the mass adjustment liners 45. Although the elastic body 39 is shown in a simplified manner as a single material in FIGS. 11 and 12, a rubber plate and a metal plate are alternately laminated and vulcanized and bonded. As it goes, the displacement in the horizontal direction increases, and the mass body 37 installed on the upper surface vibrates in the horizontal direction.

Then, the four dynamic vibration absorbers 31, 31,
, Each of the mass bodies 37, 37,... Vibrate at the same frequency and in the same phase, and have a natural frequency substantially equal to the natural frequency of the steel structure 1. In addition, these masses 3
The total sum of the masses of 7, 37,... Is set to a magnitude necessary and sufficient to suppress the vibration mode of the steel structure 1, and the vibration of the steel structure 1 is absorbed. I have. Thereby, as shown in FIG. 5, the natural frequency of the dynamic vibration absorber 31 is changed to the natural frequency f of the vibration mode of the steel structure 1.
5, the peak M falls as shown by the dashed line in FIG. 5 to form a valley, and is divided into two peaks N and N on both sides thereof. Therefore, when the frequency of the vibration source is constant at f, the vibration of the steel structure 1 is suppressed.

As described above, in this embodiment, the base 29
At the installation position of the drive unit 23 of the steel structure 1 which vibrates with the node as a node and the upper part (the installation position of the drive unit 23) as an antinode, four dynamic vibration absorbers having a natural frequency substantially equal to the natural frequency of the steel structure 1 Are installed, the vibration of the steel structure 1 can be effectively absorbed and the resonance of the steel structure 1 at the natural frequency can be prevented. It is possible to suppress the vibration in the natural vibration mode with the antinode of the (drive device 23 installation location) antinode, and to reliably prevent low-frequency sound pollution.

In this embodiment, four dynamic vibration absorbers 3
Are provided on the upper part of the steel structure 1 (location where the driving device 23 is installed), that is, on the antinode with a large amplitude.
Vibration of the steel structure 1 can be more effectively suppressed.

Further, in this embodiment, since the vibration of the steel structure 1 is suppressed by the dynamic vibration absorber 31, it is necessary to reduce the operating speed of the parking device 3 so that the steel structure 1 does not vibrate. In this way, it is possible to prevent a decrease in the entrance / exit efficiency without hindering entrance / exit. Further, it is not necessary to make the steel structure a double structure so that vibration is not transmitted to the outer steel structure, and it is possible to prevent an increase in the site area by that much. Furthermore, the dynamic vibration absorber 3
By simply installing 1 on the receiving beam 7a, it can be easily applied to existing mechanical parking facilities.

In this embodiment, a plurality of dynamic vibration absorbers 31 are installed, and the mass 3 of these dynamic vibration absorbers 31, 31,.
Since the vibration of the steel structure 1 is absorbed by the sum of the masses of 7, 37,..., Each dynamic vibration absorber 31 is light in weight, easy to handle, and has a large mass. Even if it is necessary to increase the mass of the dynamic vibration absorber 31 corresponding to the structure 1, the dynamic vibration absorber 31
There is an advantage that loading and installation can be facilitated.

As another feature of the present invention, the mass body 37 of each of the dynamic vibration absorbers 31 is supported on the steel structure 1 by a silicon damper 49. Specifically, silicon dampers 49, 4 are provided at two locations on both sides of the dynamic vibration absorber 31.
Each of the silicon dampers 49 includes a container 51 filled with silicon, and the containers 51 are set on the setting plate 40 on the receiving beam 7a. The lower end of an L-shaped resistance plate 53 is inserted into the container 51, and the upper end of the resistance plate 53 is connected to the end surface of the lowermost weight plate 43 of the mass body 37 with a bolt 55. Then, the resistance plate 53 moves in the silicon along with the horizontal vibration of the mass body 37, and a viscous resistance is generated when the resistance plate 53 moves, so that a damping force is generated and the vibration energy of the steel structure 1 is attenuated. Has become.

By attaching the silicon dampers 49, 49 to the dynamic vibration absorber 31, the peak N is also suppressed low as shown by a two-dot chain line in FIG. 5, and a gentle curve is formed around f.

Therefore, in this embodiment, the vibration of a wide range of frequencies including the natural frequency of the steel structure 1 can be suppressed by the damping function of the silicon dampers 49, 49.

Next, several modified examples of this embodiment will be described. These modified examples are merely examples in which the arrangement, the installation location, and the number of the dynamic vibration absorbers 31 are changed, and the present invention is not limited to this, and it goes without saying that one may be provided. Further, even if the arrangement or the like is changed, the same operation and effect as in the first embodiment can be obtained.

FIG. 6 shows a first modified example, in which four dynamic vibration absorbers 31, 31,... Are provided two by two on longitudinal beams 7, 7, respectively.

FIG. 7 shows a second modification, in which a lateral receiving beam 7 is provided.
a, 7a is provided with an intermediate beam 7b, and four dynamic vibration absorbers 31,
This is an example in which 31,... Are installed on the intermediate beam 7b in a single row.

FIG. 8 shows a third modification, in which four dynamic vibration absorbers 31, 31,... Are provided two by two on the uppermost lateral beam 7, 7, respectively.

FIG. 9 shows a fourth modification, in which four dynamic vibration absorbers 31, 31,... Are installed one by one on four pillars 5, 5,.

FIG. 10 shows a fifth modified example, in which eight dynamic vibration absorbers 31, 31,... Are respectively installed on two upper and lower horizontal beams 7, 7 and two receiving beams 7a, 7a. .

In these modifications, the dynamic vibration absorbers 31, 31,... Are installed above the steel structure 1 having a large amplitude.
Also, it is sufficient that the total weight of the installed dynamic vibration absorbers 31, 31, ... is sufficient to absorb the vibration of the steel structure 1. In these modifications, although not shown, a silicon damper 49 having an attenuation function is additionally provided.

Further, instead of the rubber elastic body 39 employed in the above-described embodiment and each modified example, a high-damping laminated rubber having both a damping function and an elastic function may be used. May be used to connect the mass body 37 to the receiving beam 7a (or the beam 7).

In the above-described embodiment and each modified example, the case where the mechanical parking equipment is a vertical circulation parking equipment is shown. However, the present invention can be applied to, for example, an elevator parking equipment. .

[0038]

As described above, according to the present invention,
A dynamic vibration absorbing means having a natural frequency substantially equal to the natural frequency of the steel structure is provided at at least one position on the upper part of the steel structure vibrating with the base part as a node and the upper part as an antinode. Since the vibration of the steel structure is absorbed, the vibration of the steel structure can be effectively suppressed without lowering the entrance / exit efficiency and increasing the site area, and low vibration generated from the outer wall of the parking facility due to the vibration. Wave noise pollution can be reliably prevented. Furthermore, since the mass body of the dynamic vibration absorbing means is supported on the steel structure by the silicon damper which generates a damping force by viscous resistance generated by the horizontal vibration, not only the natural frequency of the steel structure but also the vibration around the steel structure. The vibration of the steel structure can be suppressed in the range of the number.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a vertical circulation type parking facility to which a vibration damping structure according to an embodiment is applied.

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

FIG. 3 is a longitudinal sectional view of the steel structure showing a state where the dynamic vibration absorber is installed in the embodiment.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 shows characteristics of a resonance curve of a low-frequency sound of vibration of a steel structure, a resonance curve of a low-frequency sound when a dynamic vibration absorber is provided, and a resonance curve of a low-frequency sound after being attenuated by a silicon damper. FIG.

FIG. 6 is a diagram corresponding to FIG. 4 of a first modified example.

FIG. 7 is a diagram corresponding to FIG. 4 of a second modified example.

FIG. 8 is a diagram corresponding to FIG. 3 of a third modified example.

FIG. 9 is a view corresponding to FIG. 3 of a fourth modified example.

FIG. 10 is a view corresponding to FIG. 3 of a fifth modified example.

FIG. 11 is a front view of the dynamic vibration absorber used in the example.

FIG. 12 is an enlarged view of a portion A in FIG. 11;

FIG. 13 is an explanatory diagram showing a low-frequency propagation state in a conventional mechanical parking facility and a house around it.

FIG. 14 is an explanatory diagram showing vibration in a natural vibration mode of a steel structure in a conventional mechanical parking facility.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel structure 3 Parking device 23 Drive device 29 Base part 31 Dynamic vibration absorber (dynamic vibration absorbing means) 37 Mass body 39 Elastic body 49 Silicon damper

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04H 6/14 604 E04H 9/02 341

Claims (1)

(57) [Claims] 1. A mechanical parking device that supports a parking device, and a driving device that drives the parking device includes a steel structure installed on an upper portion, and the steel structure vibrates with a base portion as a node and an upper portion as an antinode. a damping structure for equipment, at least one portion of the upper portion of the steel structure, rubber allowed to support the mass body, the interposed by mass between the mass body and steel structure in the steel structure An elastic body, and a dynamic vibration absorbing means for absorbing vibration of the steel structure having a natural frequency substantially equal to the natural frequency of the steel structure is provided , and the mass of the dynamic vibration absorbing means is By silicon damper
The silicon damper is supported by the steel structure, and the horizontal vibration of the mass body is provided.
The damping force is generated by viscous drag generated by
A vibration damping structure for a mechanical parking facility, which is configured to attenuate vibration energy of a structure.