JP4390396B2 - Levitation travel device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a levitating device, and is an improvement of an air pad for levitating a vehicle from a track surface.
[0002]
[Prior art]
For example, in airports, business parks, shopping centers, resort facilities, etc. as sophisticated and complicated urban spaces, low-noise, low-vibration, and safe transportation for short distances is required. In order to meet this demand, there is a horizontal elevator as shown in FIG. In FIG. 6, the vehicle 1 is not provided with wheels for running on the raceway surface 2, but is provided with levitation means for levitating the vehicle 1 from the raceway surface 2 instead.
[0003]
As shown in FIG. 7, the levitation means includes a blower 4 provided on the chassis 3 for pumping air, an air pad 5 for jetting the air pumped from the blower 4 to the track surface 2 and supporting the vehicle 1 while levitating. It is made up of. The air pad 5 is composed of a pad hub 5a and a pad rubber 5b. When air is ejected from the ejection hole 5c of the pad rubber 5b, the vehicle 1 is levitated and between 0.02 and 0.02. A thin air film of 03 mm is formed, and the vehicle 1 can move smoothly in the horizontal direction.
[0004]
FIG. 5 shows the structure of the driving means for driving the vehicle 1 that has floated in this way. A rope 7 is wound between a pair of turning sheaves 6a and 6b, and tension is applied by hydraulic cylinders 8a and 8b and tension sheeps 9a and 9b. The central portion of one rope 7 is wound around the driven sheave 13 2 to 3 times, and is wound around the driving sheave 14 below the driven sheave 13. The driving sheave 14 is attached to the output shaft 15 a of the electric motor 15. The rope 7 is driven back and forth by an electric motor 15, and the vehicle 1 is coupled to the rope 7 via a hitch plate 16 as shown in FIG. 6.
[0005]
[Problems to be solved by the invention]
However, when a large number of passengers ride on the vehicle 1 and a load applied to each air pad 5 is large, a squealing phenomenon in which a sound like a whistle is generated from the air pad 5 occurs. This sound is very loud and unpleasant.
[0006]
Then, an object of this invention is to provide the levitation travel apparatus which solved such a subject.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided an air pad provided at a lower portion of a vehicle, the air pad being connected to a lower surface of the vehicle, and a pad rubber covering the lower surface of the pad hub. And a bottom plate that connects the center portion of the pad rubber to the pad hub, and an ejection hole formed in the pad rubber around the bottom plate, and is pumped from the ejection hole toward the raceway surface. In the levitation travel device in which the vehicle levitates and travels by jetting air , the outer surface of the bottom plate positioned on the upstream side of the flow path of the pressure-fed air to the bottom plate It is characterized by sticking a sound absorbing material whose diameter is larger than φ70mm ,
The structure of the levitation travel device according to claim 2 is characterized in that, in claim 1, a sponge is used as the sound absorbing material .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the levitation traveling apparatus according to the present invention will be described below. Since this embodiment is an improvement of the pad rubber of an air pad in a conventional horizontal elevator, the same parts as those of the conventional one are denoted by the same reference numerals and the description thereof will be omitted, and only different parts will be described.
[0009]
(A) Embodiment 1
First, the first embodiment will be described with reference to FIG.
[0010]
As shown in the figure, a sponge 18 as a sound absorbing material is adhered to the inner surface of the pad rubber 5b. The sponges 18 are arranged radially at intervals of 60 ° with the center of the pad rubber 5b as the center. As the sponge used as the sound absorbing material, a soft material for sound absorption is used, and a hard rubber-based material is excluded.
[0011]
In the horizontal elevator using the air pad having the pad rubber 5b, squealing did not occur at all.
[0012]
(B) Embodiment 2
Next, the second embodiment will be described with reference to FIG.
[0013]
In this embodiment, as shown in the figure, the sponge 18 to be attached to the inner surface of the pad rubber 5b is attached along a circle centered on the center of the pad rubber 5b.
[0014]
Since the configuration and operation of the sponge 18 are the same as those of the first embodiment, description thereof is omitted.
[0015]
(C) Embodiment 3
Next, Embodiment 3 will be described with reference to FIG. In this embodiment, the sponge 18 is adhered to the outer surface of the pad rubber 5b.
[0016]
As shown in the figure, a circular bottom plate 5d is fixed to the center of the lower surface of the pad rubber 5b, and a sponge 18 having an outer diameter slightly smaller than the outer diameter of the bottom plate 5d is attached to the lower surface of the bottom plate 5d. Has been. The outer diameter of the sponge 18 is φ221 mm, and the thickness t is t = 5 mm.
[0017]
Even in the horizontal elevator using the air pad having the pad rubber 5b, no squealing occurred.
[0018]
When the outer diameter of the sponge 18 was set to φ70 mm, squealing did not occur easily, but a certain degree of occurrence was observed. From this, it is considered that squealing occurs at φ70 mm or less.
[0019]
On the other hand, assuming that vibration sound is generated because the pumped air directly hits the bottom plate 5d, a φ18mm sponge 18 was stuck inside the bottom plate 5d, but squealing occurred immediately. . From this, it is considered that there is no vibration sound source upstream of the bottom plate 5d in the air flow.
[0020]
(D) Embodiment 4
Finally, the fourth embodiment will be described with reference to FIG.
[0021]
As shown in the figure, a sponge 18 having an outer diameter substantially the same as the outer diameter of the bottom plate 5d is attached to the entire lower surface of the bottom plate 5d.
[0022]
Even in the horizontal elevator using the air pad having the pad rubber 5b, no squealing occurred.
[0023]
When sticking to the whole lower surface of the bottom plate 5d, squealing did not occur even when a sponge for filling a gap was stuck. From this, it seems that it is most effective to attach a sound absorbing material to the entire lower surface of the bottom plate 5d.
[0024]
In addition, although Embodiment 1-4 showed about the case where this invention is applied to the horizontal elevator which is one of the levitation travel apparatuses, it is not restricted to a horizontal elevator, It has a structure which floats and travels while having an air pad. It can be applied to anything. Further, the sound absorbing material is not limited to sponge, and various materials can be considered.
[0025]
【The invention's effect】
As can be seen from the above description, according to the levitation travel device according to claims 1 and 2 , the outer diameter dimension is provided on the lower surface of the bottom plate located upstream of the flow path of the air pressure-fed to the bottom plate. Since a sound-absorbing material larger than φ70 mm is pasted, the occurrence of a squealing phenomenon that occurs when the load per air pad is large is prevented. Therefore, stopping and traveling by the levitation traveling device are performed quietly and comfortably.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 relates to a pad rubber according to a first embodiment of a floating traveling apparatus according to the present invention, wherein (a) is a plan view and (b) is a front view.
FIGS. 2A and 2B relate to a pad rubber showing a floating traveling apparatus according to a second embodiment of the present invention, wherein FIG. 2A is a plan view and FIG. 2B is a front view;
FIGS. 3A and 3B relate to a pad rubber showing a floating traveling apparatus according to a third embodiment of the present invention, wherein FIG. 3A is a front view and FIG. 3B is a bottom view;
FIGS. 4A and 4B relate to a pad rubber showing a floating traveling apparatus according to a fourth embodiment of the present invention, wherein FIG. 4A is a front view and FIG. 4B is a bottom view;
FIG. 5 is a perspective view showing the overall configuration of a horizontal elevator.
FIG. 6 is a perspective view of a vehicle in a horizontal elevator as viewed from below.
FIG. 7 is a perspective view showing a main part of a horizontal elevator.
[Explanation of symbols]
5 ... Airpad
5a ... Pad hub 5b ... Pad rubber
5c ... ejection hole
5d ... Bottom plate 18 ... Sponge (sound absorbing material)

Claims (2)

An air pad is provided at the bottom of the vehicle ,
The air pad is formed on a pad hub coupled to a lower surface of a vehicle, a pad rubber covering the lower surface of the pad hub, a bottom plate coupling a central portion of the pad rubber to the pad hub, and the pad rubber around the bottom plate. And the blowout holes made,
In the levitation traveling device in which the vehicle is levitated and traveled by jetting air sent from the ejection hole toward the raceway surface ,
A levitation travel device characterized in that a sound-absorbing material having an outer diameter larger than φ70 mm is attached to the lower surface of the bottom plate located on the upstream side of the flow path of the pressure-fed air with respect to the bottom plate .   The levitation traveling apparatus according to claim 1, wherein a sponge is used as the sound absorbing material.

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