JPH0427063B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air levitation traveling device that eliminates frictional resistance and facilitates the transportation of objects as a substitute for wheels or crawlers.

[Conventional technology]

Vehicles such as hovercrafts that levitate using air and move forward using the propulsion force of propellers are known, but such air-levitating mechanisms can be made smaller and installed in place of cart wheels, or require movement. If it is installed on the legs of audience seats, stages, etc., it can be conveniently moved by hand with little effort.

Conventionally, there is a circular type as shown in FIG. 7, which is equipped with such an air floating traveling mechanism.

This is a running body 4 in which a skirt-like lip part 3 made of a soft material such as rubber is provided on the lower surface of a disk body 2 on which an air injection pipe 1 for injecting high-pressure air from a compressor or the like is erected.

When such a traveling body 4 is attached to the lower surface of an object and high-pressure air is blown from the air injection pipe 1 to the bottom of the disc body 2, the air is blown out from the lower end of the lip part 3 pressed against the floor surface, and the air is blown out from the lower end of the lip part 3 pressed against the floor. and the floor surface.

As a result, the upper object becomes floating via the traveling body 4, and can be pushed forward with a slight force.

In the conventional device shown in FIG. 7, both the disc body 2 and the lip portion 3 are circular. In particular, the lip portion 3 is made circular to prevent the tip from opening too much outward due to air pressure.

However, if the object on the top is large or loaded with a large amount of weight, and if the surface in contact with the floor is long and narrow and the running width is narrow, a large number of relatively small running bodies 4 may be lined up. This is extremely inefficient.

On the other hand, in Japanese Utility Model Publication No. 61-34322, etc., an annular diaphragm for blowing out air is provided on the lower surface.

In Japanese Utility Model Publication No. 54-569, which is described as a prior art for this Publication of Utility Model Publication No. 61-34322, a supporting member and an annular diaphragm are provided on the lower surface of the platform, but in Japanese Utility Model Publication No. 61-34322, Furthermore, a skirt portion for air retention is attached to the support member, and this skirt portion is suspended from the support member.

In this way, Utility Model Publication No. 61-34322 discloses that by providing a skirt portion, the air discharged from the portion where the bottom of the diaphragm contacts the floor surface is directed outward through the skirt portion having an appropriate weight. Emissions are blocked to a minimum and the air is temporarily retained in the air reservoir.

As a result, the amount of pressurized air discharged to the outside is reduced and the levitation force is increased.

However, even the method shown in Publication of Utility Model Publication No. 61-34322 requires that the floor surface be flat. For example, if the flooring material is uneven, such as sand grains or jutan, there will be a gap between the skirt part and the floor surface. Gaps are created or the amount of air escaping into the jacket material is too large to provide adequate buoyancy.

Although the necessary buoyancy can be obtained by increasing the pressure of the high-pressure air sent in, the direction in which the air is blown out from the skirt section becomes uneven, leading to a very unstable situation. Moreover, since the pressure is high, the skirt section itself may be pushed wide open, and its elasticity against vertical movement may be lost.

Particularly, if the entire skirt is circular, the expansion of the skirt can be suppressed to some extent, but if the traveling body is made into a horizontally long rectangle to match the object to be attached, it becomes difficult to prevent the skirt from opening too much.

In contrast, an air levitation conveyance device that combined a rotating belt and a diaphragm was developed in 1983.
-69390 (Utility Model Application Publication No. 57-182553).

According to this, a diaphragm is expanded by blowing compressed air through a sealing port, and a small amount of air leaks to push a rotary band-shaped belt against a floor surface and cause a conveyance platform to float.

Since there is a rotating belt-like belt between the conveyance device and the floor surface, even if there is a groove in the floor surface, there is no loss of compressed air escaping through the groove.

[Problem to be solved by the invention]

Said Utility Application No. 56-69390 (Utility Application No. 182553, 1987)
It is true that the rotating strip belt prevents the outflow of compressed air, so the levitation force is improved, but it is still not perfect, and the diaphragm and rotation may occur due to slight irregularities in the floor surface or slight irregularities in the belt. There is a possibility that a gap will occur between the belt and the belt, and air may flow out from there.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
Even if the floor surface is uneven, air leakage from the skirt is prevented as much as possible and effective buoyancy is obtained.
Moreover, it is an object of the present invention to provide an air-based floating traveling device which can satisfy both the flexibility of the skirt portion against vertical movement and the prevention of outward opening, and which is not limited to a circular shape.

[Means to solve the problem]

In order to achieve the above object, the present invention has an air injection pipe erected on the upper surface of the oblong closed box body, and an air injection hole in the center of the lower surface that is continuous, slit-shaped, or has a large number of small holes arranged in a longitudinal direction. The lower surface of the box body is airtightly covered with a sheet made of synthetic resin, etc., and the sheet is attached so that it can swell with slack, thereby forming a skirt. A large number of small air outlets are arranged in the longitudinal direction of the center, and an endless belt made of a durable sheet can move the entire longitudinal direction of the oblong closed box body, which has a skirt section at the bottom. In addition, an airtight ultra-thin sheet is placed between the skirt portion and the endless belt so that the center part is fixed on the skirt portion side or the endless belt side, and the end of the airtight ultra-thin sheet is attached to the skirt portion. The gist of this is that it is brought out from between the endless belt and the endless belt.

[Effect]

According to the present invention, high-pressure air injected into the box body from the air injection pipe comes out from the bottom surface of the box body and is ejected from the inside of the skirt portion to the outer periphery, thereby creating buoyancy.

At that time, there is a sheet that is an endless belt under the skirt, and air is blown out from between the endless belt and the skirt, so it is possible to reduce unevenness on the floor surface and the amount of air escaping into the flooring. I can do it.

The ultra-thin airtight sheet is attracted by the high-speed air and further narrows the gap between the skirt and the endless belt at the lower end of the outer periphery of the skirt. Prevents air from flowing out even on uneven surfaces.

As a result, leakage of high-pressure air is halved and frictional resistance is also reduced by 40%.

Additionally, since the sheet below the skirt is belt-shaped, there is no need to lay the sheet over the entire floor.

Furthermore, the straight skirt part tries to push the seat upward as the air tries to escape, but since the seat is expanded by air pressure from inside, it can be prevented from being pushed up more than necessary. .

〔Example〕

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

Fig. 1 is a vertical sectional front view showing the first embodiment of the air-based floating traveling device of the present invention, Fig. 2 is an external perspective view of the same, and 5 in the figure is a horizontally elongated metal square pipe formed by closing both ends. A closed box is shown.

Air injection pipe 1 is installed on the upper surface of the oblong closed box body 5.
A continuous slit-like air jet hole 6 or an array of small holes 6 is formed in the longitudinal direction in the center of the lower surface.

The lower surface of the box body 5 is airtightly covered with a sheet 7 made of synthetic resin or the like, and the sheet 7 is attached with slack so that it can expand, thereby forming a skirt portion 8. The material of the seat 7 is Teflon-treated to make it easy to skid.
or something similar is suitable.

Further, a large number of small air ejection holes 9 are arranged in the central longitudinal direction of the sheet 7. 10 in the figure is
This is a presser for airtightly fixing the end of the sheet 7 to the side surface of the box body 5.

An endless belt 14 made of a durable sheet is movably wound around the entire longitudinal direction of the oblong closed box body 5 having the skirt portion 8 at the lower part.
It forms something like a crawler track (trade name: Catapira).

The width of the endless belt 14 is at least as large as the width when the skirt portion 8 is expanded, and is larger than the width of the box body 5, but a mountain-shaped belt guide 11 is set up on the top surface of the box body 5. , the belt 14 was wound over this to prevent it from sagging. Furthermore, supporting plates 12, 12' are provided on both sides of the belt guide 11.
, and the belt 14 is attached to this support plate 1.
2 and 12'.

Furthermore, as shown in FIG. 4, an extremely thin sheet 15 with an airtightness of, for example, about 0.2 m/m or less is provided below the skirt portion 8.

In this case, the centers of the sheets 7 and 15 are fixed to the bottom surface of the box 5 so that air can easily circulate to the endless belt 14, and the air injection hole 6 at the center of the bottom surface of the box 5 is connected to the air injection hole 9 of the sheets 7 and 15. and 9′
At the same time, an air jet hole 6' is also provided near the end of the lower surface to inflate the sheet 7.

Then, the ultra-thin sheet 15 is extended outward along the skirt portion 8, and the end portion is made to come out from the skirt portion 8. Further, high pressure air is prevented from entering between the sheet 7 and the ultra-thin sheet 15.

Next, the usage and operation will be explained. As shown in FIG. 3, the traveling device of the present invention is attached to a machine or other large object 13 in a sled shape as a substitute for wheels etc. via supporting plates 12, 12'. Install.

In this case, the number of attached running bodies of the present invention can be changed depending on the weight of the object 13 or the weight of the load on the object 13, and the small pressure can be changed.Furthermore, wheels etc. can be used in combination. good.

Although not shown, from the air compressor
When high-pressure air of approximately 0.2Kg/ ^cm2 to 5Kg/ ^cm2 is sent into the box body 5 through the air injection pipe 1, the first
As shown in the figure, this air is ejected from the air ejection holes 6 and inflates the sheet 7 to form a skirt portion 8. Further, while inflating the seat 7 as described above, the high-pressure air is ejected from the air injection hole 9 to the center of the lower surface of the seat 7, and is ejected from between the seat 7 and the endless belt 14 to the outside to levitate the entire seat. In addition, the center of the sheet 7 can be drawn toward the box body 5 and attached.

The object 13 may be moved by other power or human power, and since the bottom surface of the endless belt 14 is in contact with the floor 16, it is dragged by the floor 16 and rotates as the object 13 moves. When the injection of high-pressure air is stopped, the sheet 7 is simply pressed against the box body 5 and there is no risk of deformation.

In addition, as shown in Figure 5, high pressure air is
5 and attempts to exit from between the belt 14 and the end of the ultra-thin sheet 15 at the lower end position of the outer periphery of the skirt portion 8.

As a result, slight irregularities on the floor or the belt 14
Even when the surface is slightly uneven, the ultra-thin sheet 15 is attracted by the high-velocity air at the edge, and the 1
The gap between 5 and 16 is further narrowed, the leakage of high-pressure air is halved, and the frictional resistance is also reduced by 40%.

Furthermore, as another embodiment, as shown in FIG. 6, it is also possible to attach the ultra-thin sheet 15 to the lower belt 14 and allow air to flow out from the upper side of the ultra-thin sheet 15.

〔Effect of the invention〕

As described above, even if the floor surface is uneven, the air-based levitation traveling device of the present invention has an airtight ultra-thin sheet and an endless belt under the skirt, so the endless belt narrows the gap and allows the air to flow. In addition, the airtight ultra-thin sheet is attracted by the high-speed air and further narrows the gap between the skirt and the endless belt at the lower end of the outer periphery of the skirt, so it can be used to prevent slight irregularities or unevenness on the floor. It is possible to prevent air from flowing out even if the endless belt has slight irregularities.

As a result, leakage of high-pressure air is halved, frictional resistance is also reduced by 40%, and buoyancy can be efficiently generated.

In addition, the skirt section exhibits elasticity due to the bulge caused by air pressure, ensuring flexibility against vertical movement, and this bulge prevents high-pressure air from coming out from the skirt section and the floor and pushing the skirt section apart. This can further increase buoyancy.

In this manner, the present invention allows the overall shape to be not only circular but also elongated and linear.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing a first embodiment of the air-based floating traveling device of the present invention, Fig. 2 is a perspective view of the same, Fig. 3 is an explanatory view showing an example of use, and Fig. 4 is a
FIG. 5 is an enlarged view of the essential parts of the same, FIG. 6 is a partial front view of the third embodiment, and FIG. 7 is a front view of the conventional example. 1...Air injection pipe, 2...Disc body, 3...
...Rip portion, 4... Traveling body, 5... Oblong closed box body, 6, 6', 9, 9'... Air outlet, 7...
Seat, 8...Skirt part, 10...Press fitting, 11...Belt guide, 12, 12'...Supporting plate, 13...Object, 14...Endless belt,
15...Ultra-thin sheet, 16...Floor surface.

Claims (1)

[Claims] 1. An air injection pipe is erected on the upper surface of the horizontally long closed box, and an air outlet in the center of the lower surface is formed in the longitudinal direction in the form of a continuous slit or with a large number of small holes arranged. The lower surface is airtightly covered with a sheet made of synthetic resin, etc., and the sheet is installed with slack so that it can expand, thereby forming a skirt, and a large number of small holes are formed in the longitudinal direction of the center of the sheet. An endless belt made of a durable sheet is movably wound around the entire longitudinal direction of an oblong closed box body having air jet holes arranged therein and having a skirt portion at the lower part, and
An airtight ultra-thin sheet is installed between the skirt portion and the endless belt so that the center part is fixed on the skirt portion side or the endless belt side, and the end of the airtight ultra-thin sheet is inserted between the skirt portion and the endless belt. A levitation traveling device using air, which is characterized by being brought out to the outside.