JP2529049Y2 - 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 a mechanical parking system, and more particularly to a mechanical parking system having a soundproofing device.

[0002]

2. Description of the Related Art In an area where houses are densely located, such as in the city center, it is difficult to secure sufficient parking space due to a sharp rise in land prices, and therefore mechanical parking facilities are often used.

FIG. 5 shows an example of a mechanical parking facility as a background art of the present invention. Mechanical parking equipment 1 shown in FIG.
Is a so-called vertical circulation type, in which each cage 2 is connected to a pair of front and rear endless chains 4 via an attachment 3 as a vehicle mount, and the endless chain is driven by a parking facility driving means (not shown). 4 to drive and circulate, and the vehicle W
The vehicle can enter the cage 2a located at the vehicle entrance from the vehicle entrance 5.

[0004] The mechanical parking equipment is covered with an exterior panel 6 in order to protect the stored vehicle W from rain and wind and improve the appearance.

[0005]

However, as described above, the mechanical parking equipment circulates and moves a number of vehicles W mounted on the cage 2 as described above, so that the parking equipment driving means must be large-scale. The mechanical sound during the operation was also considerable.

[0006] As described above, mechanical parking facilities are often constructed in densely populated areas such as houses and buildings in the city center. However, in order to reduce the weight and reduce the construction cost, a thin exterior panel is used as the outer wall. As a result, internal noise leaks to the outside, and noise countermeasures for nearby residents have been a problem.

As a method of reducing this noise, a method of providing a soundproof wall between adjacent houses, a method of doubling a panel 6 of the outer wall and filling the inside with a soundproofing material, and a method of further increasing the thickness of the outer wall by thick concrete However, all of these methods have the drawback of extremely high construction costs, and also require a wider surrounding area, thus requiring a larger area of land for construction. There is a problem that the land cost becomes high and the installation place is limited.

Further, as shown in FIG. 6, when the mechanical parking facility 1 has already been constructed and the distance from the adjacent house 7 is extremely short, the above-mentioned method is no longer used. Could not cope.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a mechanical parking facility capable of reducing noise given to the surrounding residents by providing a simple soundproofing device.

[0010]

In order to achieve the above object, a mechanical parking system according to the present invention has an outer wall, in which a number of vehicle mounts are stored and transferred inside the outer wall. In a mechanical parking facility for entering and exiting a target vehicle from a vehicle entrance, noise detection means for detecting noise when the mechanical parking facility is operated, and for canceling the noise based on a signal from the noise detection means. Anti-phase signal generating means for generating a signal of the opposite phase, amplifying means for amplifying the signal from the anti-phase signal generating means, and sound wave generating means for receiving an output signal from the amplifying means and generating a sound wave for silencing And a noise prevention device comprising:

[0011]

The noise leaking from the outer wall during operation of the mechanical parking equipment is detected by the noise detecting means, and the anti-phase signal generating means generates a signal of the opposite phase at the timing of canceling the noise by the detection signal. Amplifying means amplifies the opposite phase signal and converts it into sound waves by sound wave generating means.

Since this sound wave has an opposite phase to the above-mentioned noise, the two interfere with each other to produce a noise-eliminating effect.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, but this does not limit the technical scope of the present invention.

The soundproofing device in the mechanical parking system according to the present invention utilizes a sound interference effect. As is well known, a sound wave is a longitudinal wave that propagates through a medium such as air, and when two types of waves are combined, the amplitude of the wave becomes the sum of the amplitudes of the original waves (wave interference). A striking feature of the wave interference effect is that when the bottom of one wave coincides with the apex of the other wave, and if the amplitudes of both waves are equal, cancellation occurs between both waves, Under the optimal conditions, the amplitude of the sound is 0, that is, the sound can be completely silenced.

FIG. 1 is a schematic diagram showing the configuration of a first embodiment of a soundproof device for a mechanical parking facility according to the present invention.

The soundproofing device 8 has a sound collecting microphone 9 installed outside the exterior panel 6 of the mechanical parking facility 1 as a noise detecting means, and receives a signal from the sound collecting microphone 9 to cancel the noise. An anti-phase signal generator 10 for generating an anti-phase signal at such timing, and the anti-phase signal generator 1
The amplifier 11 amplifies the signal from the microphone 0 and the signal from the microphone 9 so that the noise is minimized.
The volume controller 12 includes a volume controller 12 for controlling an amplification degree of 1, and a speaker 13 as a sound wave generating means for generating a sound wave in response to an output signal from the amplifier.

The speaker 13 further includes a moving coil section 13a as a vibration generating means, and a cone section 13b as a vibrator for generating a sound wave by the operation of the moving coil section 13a. As a result, vibration is given to the air in front, and a predetermined sound-absorbing sound wave 14 is emitted.

The speaker 13 is attached to a portion near the house 7 adjacent to the exterior panel 6, and its front portion is covered with a waterproof sheet 13d. Sound insulation cover 13c
Is provided.

The sound collecting microphone 9 is arranged in front of the speaker 13 by a support rod 9a.

FIG. 2 shows a preferred embodiment of the anti-phase signal generator 10. As shown in FIG.

The opposite phase signal generator 10 includes a waveform extracting circuit 10a for extracting only a necessary waveform signal from a signal detected by the sound collecting microphone 9, and an inverting circuit 10b for inverting the waveform signal and setting it to an opposite phase. , And a timing setting circuit 10c for setting the timing of transmission of the antiphase signal obtained to the amplifier 11. Note that what is described on the right side of each block shows a change in a waveform signal processed by the circuit. The operation of each circuit will be described below with reference to this waveform diagram.

First, since it is only the noise 15 generated from the direction of the parking facility 1 that the soundproofing device 8 wants to mute, it is desirable to use a microphone having high directivity as the sound collecting microphone 9. However, as shown in the waveform signal W1, various surrounding noises are still picked up.

[0023]

In view of this, the noise 15 unique to mechanical parking equipment
The frequency depends on the type and size of the parking facility, the exterior panel 6
Although it differs depending on the material of the
Can be determined experimentally by
I will ask for it. The waveform extraction circuit 10a collects
Apply a frequency filter to the waveform signal from the sound microphone 9
The noise characteristic of the mechanical parking equipment
Cut frequencies other than 15
ing.

In addition, the sound collecting microphone 9 is connected to the exterior panel 6.
Together closer to the threshold provided in the circuit, it is configured to cut the signal of the reference level or less of the sound, and is it possible to extract the waveform signal W2 of almost only noise 15 of the mechanical parking 1 .

However, in this case, if the sound collecting microphone 9 is brought closer to the exterior panel 6 than necessary, all the noises affecting the adjacent house 7 cannot be picked up, and there is a possibility that noises other than those near the sound collecting microphone 9 cannot be muted. Be careful.

Next, the waveform signal W2 is inverted by the inverting circuit 10b. This can be easily achieved by reversing the polarity of the waveform signal W2. The opposite-phase waveform signal W3 thus obtained is sent to the timing setting circuit 10c.

The timing setting circuit 10c is provided with a delay circuit therein. By changing the delay time according to various conditions, the timing is set so that the sound deadening effect of the soundproofing device 8 is maximized. The waveform signal W3 is sent to the amplifier 11. In other words, even if the noise 15 is detected by the sound collecting microphone 9 and the silencing sound wave 14 having the opposite phase is emitted in the same direction in real time, the detected noise 15
The sound wave is traveling ahead, and the noise 15 itself can no longer be silenced. Therefore, the timing setting circuit 10c
The delay time is adjusted so as to be transmitted in accordance with the next generation timing of the noise 15 having the same waveform. Most of the noise 15 of the mechanical parking system 1 is a mechanical sound that is generated regularly, so that it is possible to sufficiently cope with this method.

The setting of such a delay time can be set in advance according to the distance of the sound collecting microphone 9 from the exterior panel 6 and the period of the mechanical sound. The change in the delay time due to the change) can be achieved by performing feedback control based on the magnitude of the signal from the sound collecting microphone 9 directly input to the timing setting circuit 10c.

The signal from the sound collecting microphone 9 is also sent to the volume controller 12, and the noise after silencing is minimized, for example, 40 dB.
The signal amplification in the amplifier 11 is controlled as follows.

Since the noise 15 is actually generated from the entire exterior panel 6, it is impossible to completely suppress the noise 15 with the above soundproofing device 8. As shown in FIG. 1, by providing the nearest house 7 to the adjacent house 7 in question, it is possible to at least reduce the noise 15 applied to the house 7 to a level below the standard. If necessary, the exterior panel 6
May be increased in number.

FIG. 3 shows another embodiment for facilitating the timing setting in the above-mentioned anti-phase signal generator 10.

The feature of this embodiment is that the position of the sound collecting microphone for generating the opposite phase signal is provided closer to the outer panel 6 than the vibrating body of the sound wave generating means.

More specifically, a flat speaker 16 is employed as a sound wave generating means, and a vibrating body 16a on the front thereof is projected slightly outside the surface of the exterior panel 6 of the mechanical parking equipment 1, and a sound collecting microphone is provided. 9 is provided separately from a sound collecting microphone 17 dedicated to generating an inverted phase signal, and the sound collecting microphone 17 is installed in a state in which the microphone 17 is almost in close contact with the surface of the exterior panel 6.
The conventional sound collecting microphone 9 is connected only to the volume controller 12.

With such a configuration, the noise 15 can be detected and the sound-absorbing sound wave 14 can be transmitted almost simultaneously with the progress of the waveform of the noise 15.
0, the timing circuit 10c can be simply configured, and the timing circuit 10c can be made unnecessary by optimizing the installation conditions of the sound collecting microphone 17 and the flat speaker 16.

However, in the case of this embodiment, the sound collecting microphone 1
7 is close to the exterior panel 6, so that the noise 15 that can collect sound is limited to the vicinity thereof, and there is a possibility that all the noise 15 affecting the adjacent house 7 cannot be collected. A plurality may be provided and attached to different places, or a plurality of soundproofing devices 8 may be provided on the exterior panel 6 in the direction of the adjacent house 7.

The surface of the vibrating body 16a of the flat speaker 16 and the surfaces of the sound collecting microphones 9 and 17 are covered with, for example, a waterproof sheet (not shown) to be subjected to waterproof treatment. At the back of the flat speaker 16, a sound insulating cover 16b for preventing the silencing sound wave 14 from dissipating to the rear is provided.

FIG. 4 shows another embodiment of the sound wave generating means.

In the same figure, an outer panel is also used as a vibrating body of the sound wave generating means, a part of the outer panel is made thin, and this thin plate portion 6a is forcibly vibrated by an actuator 18 provided inside. This is a method of generating the silencing sound wave 14 from the exterior panel itself.

According to this method, in addition to the noise reduction effect due to the interference between the sound waves, a function of canceling the vibration of the exterior panel 6 itself is generated, and the noise can be effectively reduced. The actuator 18 may be of an electromagnet type, a pneumatic type or a hydraulic type cylinder,
It is also possible to use a piezoelectric element.

The type of the actuator 18 can be selected as necessary in consideration of cost and response to the frequency signal from the amplifier 11.

It should be noted that the soundproofing device of the present invention is not limited to the vertical circulation type mechanical parking equipment as shown in the background art, but also to the multilayer circulation type or the horizontal circulation type.
Alternatively, the present invention can be applied to all mechanical parking facilities in which noise is a problem, such as an elevator type.

[0043]

According to the structure of the present invention, the noise generated from the mechanical parking equipment is detected, and a sound wave for silencing having a phase opposite to that of the noise is generated at an appropriate timing. Can cancel each other and cancel each other out, so that a large-scale soundproof wall can be provided between adjacent houses, or the outer wall panels are doubled and soundproofing material is packed inside, It is not necessary to make the outer wall made of thick concrete, and it is possible to construct a low-cost mechanical parking facility with a soundproofing device in a conventional space. In addition, it can be easily installed even in a parking facility that has already been built, and the surrounding residents do not feel uncomfortable due to noise.

[Brief description of the drawings]

FIG. 1 is a first view of a soundproofing device of a mechanical parking system according to the present invention.
It is a figure which shows the Example of.

FIG. 2 is a diagram showing a configuration of an anti-phase signal generator of the soundproofing device in FIG.

FIG. 3 shows a second embodiment of the soundproofing device of the mechanical parking equipment according to the present invention.
It is a figure which shows the Example of.

FIG. 4 is a diagram showing another embodiment of the sound wave generator.

FIG. 5 is a diagram showing an example of a vertical circulation type mechanical parking facility as background art of the present invention.

6 is a diagram showing a relationship between the mechanical parking facility of FIG. 5 and an adjacent house.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mechanical parking equipment 6 Exterior panel 7 Adjacent house 8 Soundproof device 9, 17 Sound collection microphone, 10 Out-of-phase signal generator 11 Amplifier 12 Volume controller 13 Speaker 16 Flat speaker

Claims (3)

(57) [Scope of request for utility model registration] 1. A mechanical parking facility having an outer wall, in which a number of vehicle mounts are stored and transported inside the outer wall, so that a target vehicle enters and leaves from a vehicle entrance. Noise detection means for detecting noise during operation of the parking system; anti-phase signal generation means for generating an anti-phase signal for canceling the noise based on a signal from the noise detection means; and the anti-phase signal generation means A mechanical parking facility comprising: an amplifying unit that amplifies a signal from the unit; and a sound wave generating unit that receives an output signal from the amplifying unit and generates a sound-absorbing sound wave. 2. The mechanical parking facility according to claim 1, wherein the noise prevention device further includes a sound volume control unit that controls an amplification degree of the amplification unit in accordance with a level of the noise. 3. The sound wave generating means comprises: a vibrating body provided on the outer wall; and a vibration generating means for receiving an output signal from the amplifying means and applying a predetermined vibration to the vibrating body. The mechanical parking facility according to claim 1, wherein: