JPH0368978B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suspension structure for a large structure, and more particularly to a suspension structure that introduces tension into a panel or wire in the ceiling of a structure.

Hitherto, suspension structures have not been widely used in large structures such as athletic stadiums.

The reason for this is that building with rigid building materials increases their own weight, making the support structure difficult.

However, recently, air membrane structures have been developed that use lightweight membrane materials for ceilings that cannot withstand bending and compression.

This air membrane structure uses a membrane material that can only withstand tension and air as a compression material, so it does not require columns inside and is extremely convenient for use in large event venues and sports stadiums.

However, this air membrane structure also had the following drawbacks.

In other words, there are two types of air membrane structure: a single-layer membrane structure in which pressurized air slightly higher than atmospheric pressure is sealed inside, and a double-layer structure in which a pair of membrane materials defines a sealed space and high-pressure air is sealed inside. There is a multi-layer membrane structure, but the former single-layer structure requires the use of a special structure for the entrance and exit as it is necessary to isolate the entire structure from the outside, and also has the problem of not being able to ventilate the interior. It was hot.

On the other hand, the latter double air membrane structure does not have the above-mentioned problems, but in order to seal the membrane material and define a closed space, multiple expensive membrane materials are required, which increases costs and increases the cost. It was difficult to create a leak-free closed space due to the large number of joints between the materials.

This invention was made in view of the above-mentioned problems, and its purpose is to eliminate the need for a complicated entrance/exit mechanism, to simplify internal ventilation, and to achieve relatively low cost. To provide a suspension structure for a large structure that can be constructed at low cost and can also follow deformation.

In order to achieve the above object, the present invention provides a plurality of tensile members, each consisting of a pair of upper and lower tension members, whose ends are fixed by an annular beam and which are disposed so as to span within the beam. , a plurality of tension imparting members are provided at appropriate locations between the pair of upper and lower tension members, and extend and contract in the vertical direction to introduce tension to the tension members, and the tension members are made to protrude in a convex shape in the vertical direction. It is a hanging structure that introduces a predetermined tension into each of the tensile members, and the tension applying member connects at the base a pair of equilateral triangles or regular triangular pyramids to which the pair of upper and lower tensile members are fixed at the apexes in the vertical direction. a plurality of rod-like bodies having an outer shell shape, and hinged to each other on sides other than the base of the equilateral triangle or triangular pyramid, and between the rod-like bodies located on the base. It is characterized by consisting of a suspended counterweight or a spring member that connects the two.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show a first embodiment of a suspension structure for a large structure according to the present invention.

The suspension structure shown in the figure constitutes a part or the whole of the ceiling of the structure, and has both ends fixed to the annular beam 1, and is suspended so as to span within the annular beam 1. annular beam 1
Upper and lower tensile members 2 and 3 are arranged symmetrically in the vertical direction of the surface, and a plurality of upper and lower tensile members 2 and 3 are arranged between the tensile members 2 and 3 and extend and contract in the vertical direction to introduce tension to the tensile members 2 and 3. It is roughly composed of tension imparting members 4, 4, . . . .

In this embodiment, straight steel wires are used as the tensile members 2 and 3, but they may also be made of, for example, a synthetic resin film such as Teflon, a metal film, or a composite film that is a combination of these. good.

Further, as shown in FIG. 1, the tension imparting members 4, 4, etc. are made in height so that the center part of the annular beam 1 is the highest, and the height decreases as they approach the peripheral edge of the beam 1. Tensioning material 4 of the same height is
It is arranged so as to be located concentrically with the annular beam 1, and when tension is introduced into the tension members 2 and 3,
The upper tensile member 2 and the lower tensile member 3 are projected in a convex shape in the vertical direction so as to be spaced apart from each other.

That is, the cross-sectional shape of the annular beam 1 in the radial direction is shaped like a convex lens.

Each of the tension imparting members 4, 4, .

The tension imparting member 4 shown in the figure is formed in the shape of a substantially parallelogram outer shell formed by connecting a pair of triangles at the base, and four rod-shaped bodies 5 are hinged to each part of this outer shell shape. , 5..., and a counterweight 7 is connected in a suspended state between one of the opposing vertices by a wire rod, and the other opposing apex is connected to the tension member 2 and the lower tension member. 3, respectively.

In the tension imparting member 4 having such a structure, when a compressive force is applied between the tension members 2 and 3 in the direction of the arrow in FIG. 3, for example, as shown by the dotted line in the figure,
3 is deformed so that the vertices on the side where it is not fixed are separated from each other, and this compressive force and the counterweight 7
It stops in a state where the gravity acting on the tension members 2 and 3 is balanced, and when a tension force that separates the tension members 2 and 3 is applied, the behavior is in the opposite direction.

Therefore, even if the tension members 2 and 3 are expanded or contracted due to a temperature difference or deformed due to an external force, they will expand and contract accordingly, maintaining the suspension structure in the above-mentioned convex lens cross section, and stabilizing the structure. let

Now, in the case of the suspension structure of a large structure with the above-mentioned configuration, there is no need to separate a closed space like in the conventional air membrane structure, and therefore the entrance/exit structure can also be used as a normal building. The same one can be used.

Further, ventilation within the structure can also be arbitrarily provided at locations other than the hanging structure.

Furthermore, in order to prevent rain during rainy weather, it is sufficient to use a membrane material only on the upper tensile member 2,
Unlike conventional double air membranes, costs do not increase.

Furthermore, since the tension imparting material 4 can expand and contract to follow the deformation of the hanging structure, the structure can be stabilized.

FIG. 4 shows another example of the tensioning material 4', and only its features will be described below.

The tension imparting member 4' shown in the figure is formed in the shape of an outer shell in which a pair of triangular pyramids are connected to each other at the base part, and
The rod-shaped bodies 5, 5... of books are connected to each other by a hinge 6,
Each rod-shaped body 5, 5... is arranged on each ridgeline of the outer shell shape, and three spring members 8, 8 are arranged so as to form an equilateral triangle on the connecting bottom surface of this triangular pyramid. It is constructed by connecting bodies 5, 5, and so on.

The rod-like bodies 5, 5 located at the opposite vertices of the triangular pyramid are fixed to the upper tensile member 2 and lower tensile member 3, respectively.

The tension imparting member 4' configured in this manner has the same function as the above-mentioned parallelogram-shaped tension imparting member 4, and since each of the rod-shaped bodies 5, 5, etc. connected to the hinge 6 is located on the ridgeline of the triangular pyramid, , it can follow external forces in all directions, further improving the stability of the hanging structure.

In this embodiment, the same effect can be obtained even if the counterweight 7 is used in place of the spring member 8 described above.

The member indicated by the reference numeral 10 in FIG. 2 is an upper tie beam that connects the upper end portions of the tension imparting member 4 in an annular manner, and has the following functions.

That is, for example, when a membrane material is attached to the upper tensile member 2, the membrane material is bent between the tensile members 2 due to its own weight.

At this time, if the membrane material is locked to the tie beam 10,
The rise of the membrane material in the circumferential direction can be made constant.

As described above in detail in the embodiments, the structure for suspending a large structure according to the present invention can be used to suspend a structure in a large space without separating a closed space unlike the conventional air membrane structure. Excellent effects such as being easily and economically obtainable can be achieved. Also,
In the hanging structure of the present invention, the tension imparting material is composed of a plurality of rod-shaped bodies and a counterweight or spring material, so it is relatively lightweight, and tension can be easily introduced into the tension material using the counterweight or spring material. can do.

[Brief explanation of drawings]

FIG. 1 is a plan view of essential parts according to an embodiment of the present invention, FIG. 2 is a sectional view of FIG. 1, FIG. 3 is an explanatory diagram of an example of a tensioning material, and FIG. It is an explanatory diagram of an example. 1... annular beam, 2... upper tension member, 3...
Lower tensile material, 4...Tension imparting material, 5... Rod-shaped body,
6...Hinge, 7...Counterweight, 8...
Spring material, 10...Top tie beam.

Claims (1)

[Claims] 1 In the ceiling part of a large structure, the ends of which are fixed by an annular beam, and the tension members consisting of a pair of upper and lower members arranged to span within the beam, and the tension members between the upper and lower pairs of the tension members. A plurality of tension imparting members are provided at appropriate locations and extend and contract in the vertical direction to introduce tension to the tension member, and the tension member is made to protrude in a convex shape in the vertical direction to apply a predetermined tension to each of the tension members. The tension imparting material has an outer shell shape in which a pair of equilateral triangles or triangular pyramids are joined at the base to which the pair of upper and lower tension members are fixed to the apexes in the vertical direction, and , a plurality of rod-like bodies are arranged on sides other than the base of the equilateral triangle or equilateral triangular pyramid, and the rod-like bodies located on the base are suspended so as to connect them. A suspension structure for a large structure characterized by comprising a counterweight or a spring material.