JP2001302145A - Pneumatic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pneumatic elevator capable of increasing the push-up force of a car by converting the pressure of an air bag effectively into push-up force. SOLUTION: In a pneumatic elevator provided with an air bag 2 arranged so as to be expanded vertically, the car 3 placed on the air bag 2 and an air supply means for raising and lowering the car 3 by supplying air to and exhausting air from the air bag 2, the bottom face 3a of the car 3 is made flat to contact the top face 2b of the air bag 2 with the bottom face 3a of the car 3 closely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a pneumatic elevator.

[0002]

2. Description of the Related Art In general, a pneumatic elevator is configured to push up a car by sending air into an airbag disposed under the car and inflating the airbag, to release the air in the airbag, and to release the air in the airbag. The basket is formed so that the basket can be lowered by contracting.

[0003]

However, as shown in FIG. 5, on the bottom surface 3a of the basket 30, equipment 31 such as a reinforcing member, a mounting bracket and a sensor is provided.
A non-contact surface s occurred between the airbag 32a and the airbag 32, and the upper surface of the airbag 32 did not adhere to the bottom surface 30a of the cage 30.

[0004] Since the force is proportional to the pressure receiving area at the same pressure, the non-contact surface s between the airbag 32 and the car 30 means that the pressure receiving area becomes small. Since the pushing force of the basket 30 by the airbag 32 becomes small, there is a problem that the pressure of the airbag 32 cannot be fully utilized.

It is an object of the present invention to provide a pneumatic elevator capable of solving the above-mentioned problems and effectively converting the pressure of an airbag into a pushing force of a car and maximally utilizing the force of the airbag. Make it an issue.

[0006]

In order to solve the above-mentioned problems, a pneumatic elevator according to the present invention comprises: an airbag having an airbag body vertically stacked and arranged to expand and contract in the vertical direction; A pneumatic elevator comprising a car disposed above and a blower for raising and lowering the car by supplying and exhausting air into and from the airbag to inflate and contract the airbag, wherein the bottom surface of the car is flattened. A pneumatic elevator wherein the upper surface of the airbag and the bottom surface of the car are brought into close contact with each other.

It is preferable that the shape of the airbag in a plan view and the shape of the basket in a bottom view be approximately the same size so that the pressure of the airbag reaches the entire bottom surface of the car.

[0008]

FIG. 1 is a perspective view showing an outline of a pneumatic elevator (hereinafter, referred to as an elevator) according to the present invention. In this elevator, an air bag 2 for lifting and lowering an elevator is provided on an upper surface of a base frame 1. The elevator car 3 is provided on the airbag 2. This basket is adapted to move up and down along columns 4 set at four corners of the base frame 1 by inflating or deflating the airbag 2.
Is connected via a pipe 6 to a blower 5 for supplying air.

The basket 3 is a box on which people move on the floor while riding.
It is movable up and down along a support 4 erected on the base frame 1 and has a flat bottom surface.

The airbag 2 has a configuration in which a bag-shaped airbag body 2a is vertically stacked in multiple stages, and adjacent airbag bodies 2a communicate with each other through communication holes (not shown) formed in the respective airbag bodies. Since the inside of each airbag body 2a is connected to each other by the respective communication holes, the airbag 2 is inflated upward by sending air into the lowermost airbag body 2a by the blower 5. The upper surface 2 of the airbag 2
b is fixed so as to be in close contact with the bottom surface 3 a of the cage 3.

As shown in FIG. 2A, a method of fixing the airbag 2 to the basket 3 is to provide a ring-shaped fixing member 10 in the airbag 2 and, as shown in FIG. The upper surface 2b of the airbag 2 is fixed to the bottom surface 3a of the
It is sufficient to make it adhere to.

The blower 5 is a blower driven by the electric motor 9 and is connected to the airbag 2 through a pipe 6.
By rotating the airbag, air can be supplied to the airbag 2 via the pipeline 6.

According to the elevator having the above structure, the motor 9
When the air is supplied to the airbag 2 by rotating the blower 5, the airbag 2 is inflated and pushes the basket 3 upward. At this time, the upper surface 2b of the airbag 2 is
The bottom surface 3a of the basket 3 is formed flat, so that there is no non-contact surface between the bottom surface 3a of the cage 3 and the top surface 2b of the airbag 2. Since the pressure is a force acting on a unit area, even if the pressure is the same, a large area will cause a large force.
b becomes effective, and the force for raising the basket 3 can be further increased.

As shown in FIG. 3, the upper part of the airbag 2 may be opened, and the periphery of the opening 12 may be directly attached to the bottom surface 3a of the cage 3 by a fixing member (not shown).

Next, FIG. 4 shows another example of the elevator, in which the contact area of the airbag 2 in contact with the bottom 3a of the car 3 is substantially equal to the area of the bottom 3a of the car 3. The shape of the airbag 2 in a plan view and the shape of the cage 3 in a bottom view are formed in rectangular shapes similar to each other.

According to this elevator, the bottom surface 3 of the car 3
Since the contact area of the airbag 2 in contact with a is larger than that of a circular or elliptical airbag, the push-up force increases in proportion to the contact area at the same air pressure. Can be further increased.

[0017]

According to the first aspect of the present invention, the non-contact surface is eliminated and the effective area of the airbag is not wasted, so that the pushing force for pushing up the car can be maximized.

According to the second aspect of the present invention, since the contact area of the airbag in contact with the bottom of the car is large, the force increases in proportion to the area at the same air pressure, so that the car is pushed up by the airbag. The power can be further increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pneumatic elevator according to the present invention.

FIGS. 2 (a) and 2 (b) are cross-sectional views of a main part showing a relationship between an airbag and a car of the pneumatic elevator, and a top perspective view of the airbag.

FIG. 3 is a front view of another example of the pneumatic elevator, in which main parts are cut away.

FIG. 4 is a bottom view showing still another example of the pneumatic elevator.

FIG. 5 is a front view of an essential part of a conventional pneumatic elevator, which is cut away.

[Explanation of symbols]

 2 Airbag 2a Airbag body 3 Basket 3a Bottom of basket 5 Blower

Claims (2)

[Claims] 1. An airbag arranged so that an airbag main body is vertically overlapped and expanded and contracted in a vertical direction, a basket disposed on the airbag, and air supply / exhaust into and out of the airbag. A pneumatic elevator comprising a blower that raises and lowers the car by inflating and contracting the airbag, wherein the bottom surface of the car is flattened, and the upper surface of the airbag and the bottom surface of the car are brought into close contact with each other. Type elevator. 2. The pneumatic elevator according to claim 1, wherein the shape of the airbag in plan view and the shape of the car in bottom view are approximately the same size.