JPS61169580A - Connection joint of metal film structure roofing material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a joining joint for a flexible membrane structure roofing material using thin metal plates.

[Conventional technology]

Recently, membrane structures have been developed as new roof structures.

Membrane structures can be broadly classified into air membrane structures and tension membrane structures. An air membrane structure is a closed structure that normally has zero air pressure.
．． By increasing the air pressure by about 25%, tension is applied to the membrane to form a stable curved surface.The tension membrane structure is made up of a support structure and a membrane to which tension is applied, making it possible to create complex shapes. It has a unique structure.

This membrane structure allows for large closed spaces to be built without pillars, and the construction period is shorter than conventional construction methods.

Because it is advantageous in terms of construction costs, it is attracting attention for its application in sports facilities, shopping centers, etc.

Membrane materials used for the membrane structure include fiber membranes made of glass fiber, nylon, etc. coated with fluororesin, silicone resin, etc., and metal membranes made of thin stainless steel plates. Compared to fiber membranes, metal membranes are nonflammable, It has the advantage of being highly durable.

FIG. 9 is a perspective view showing a conventional sealed structure using a metal membrane as shown in Japanese Patent Publication No. 52-17332, and in the figure (1) is a flexible membrane roof formed of a metal membrane. , (2) are a plurality of segments made of thin metal plates constituting the flexible membrane roof (1), (3) is a central segment, and (4)
is a support structure formed under the flexible membrane roof (1), (5
) is the vertical wall of the support structure (4), (6) is the support structure (
4).

A conventional sealed structure using a metal membrane is constructed as described above, and the flexible membrane roof (1) is supported by air pressure or suspended from the outside thereof.

This flexible membrane roof (1) is made by assembling a plurality of segments (2) and a central segment (3) in a flat state as shown in the plan view of Fig. 10, and forming a curved surface by applying air pressure from the bottom, for example. . When forming this curved surface, since the plurality of segments (2) form a substantially trapezoidal shape, as shown in FIG. Separate and also the inner end (7) of segment (2)
) and the central segment (3).

Therefore between each segment (2) and segment (2)
It is necessary to use an expansion joint between the central segment (3) and the central segment (3).

Figure 12 is a cross-sectional view of a conventional expansion joint. In the figure, (8) has an Ω-shape when the flexible roof (1) is in a flat state, and is made of an elastic thin metal plate. It is an expansion joint. This expansion joint (8) is connected between adjacent segments (2) and between segments (2) and the central segment (3).
) are joined between.

When the flexible roof (1) forms a curved surface and tension is applied to the expansion joint (8), the expansion joint (8) expands into a flat shape as shown in FIG. When the flexible roof (1) returns to its flat state after removal, etc., it is desirable for the expansion joint (8) to recover to its original shape in order to maintain tension in the sheet metal segments.

[Problem that the invention seeks to solve]

The expansion joints (8) used in conventional flexible roofs (1) as described above are subject to large distortions when forming the curved surface of the flexible roof (1), and air vents sometimes do not return to the original shape. Since it is desired that the steel be recovered to its normal state, it is necessary to use high-strength materials such as stainless steel and spring steel, and to perform heat treatment, which results in high costs. Furthermore, when internal pressure is applied, the surface does not become perfectly curved, and the tension generated at this time is also uniform.
Therefore, there is also the problem that stress management during the design and construction of the flexible roof (1) is not easy.

The present invention was made to solve these problems, and its purpose is to provide an expansion joint for metal membrane roofing materials that has a simple structure and can form a stable curved surface under uniform tension. That is.

[Means for solving problems]

The joining joint for a metal membrane structure roofing material according to the present invention consists of a plurality of cylindrical joints and a holding plate. The cylindrical joint is made of an elastic thin metal plate having a circular, oval or U-shaped cross section with slits. The holding plate is inserted into each end of the slit of the cylindrical joint and held therein.

[Effect]

In this invention, by arranging a plurality of cylindrical joints between each segment of the flexible roof, uniform tension can be applied to each segment when forming the curved surface of the flexible roof.

〔Example〕

FIG. 1 is a perspective view showing an embodiment of the present invention, in which (G) is a cylindrical joint made of an elastic thin metal plate, such as a steel plate or a stainless steel plate, and having an oval cross section with a slit; A is a holding plate with one end U-bent, and both slit ends of the cylindrical joint αQ are inserted into the bent part and held. This retaining plate α force places a U-bend between adjacent segments (2) of the flexible roof, and the flat part at the other end is K-jointed to each segment (2).

The first operation during construction of the joint configured as above is explained in the second section.
Shown in Figures (a) to (c). Before the cylindrical joint α1 is held on the side of the holding plate α, both ends of the slit are overlapped due to the elasticity of the cylindrical joint αQ, as shown in FIG. 2(a). Both ends of the slit of this cylindrical joint α1 are widened, and as shown in FIG. 2(b), it is inserted into the U-bent portion of the holding plate (11) welded to each adjacent segment (2) and held. As a result, when the flexible roof becomes a curved surface, the cylindrical joint αQ expands as shown in FIG. 2(c), applying tension to each segment (2). In addition, Fig. 2 (b), (c
), (6) is a sealing material attached between adjacent segments (2).

When holding the cylindrical joint α1 by the holding plate α (g) and forming a flexible roof, the cylindrical joint αQ is held in the longitudinal direction as shown in the back view of Fig. 6 and the side view of Fig. 4. Either the cylindrical joints (G) are divided into two parts and held with zero clearance between them, or the cylindrical joints (1) with a trapezoidal longitudinal section are held as shown in Fig.
0A) between the cylindrical joint (10A)→
By providing this, bending deformation in the circumferential direction of the segment (2) is not restricted. In addition, in Figure 6 (3)
is the central segment.

Further, when holding the cylindrical joint αq separately, the stroke amount and rigidity of the cylindrical joint αQ are used depending on the location of the cylindrical joint α1. In other words, when the flexible roof forms a curved surface, the cylindrical joint α1 with high rigidity is arranged at the outer periphery where the separation interval between adjacent segments (2) is narrow, and the segments (2)
The inner periphery, where the separation between the two is wide, has less rigidity.
A relatively soft cylindrical joint αQ is arranged. The rigidity of this cylindrical joint α1 can be determined by changing the size and plate thickness of the cylindrical joint Q11, or by changing the size and plate thickness of the cylindrical joint Q11, or by using a multilayer cylindrical joint (10
By using B), you can freely select between K and K.

By applying a predetermined air pressure to the inside of the flexible roof configured as described above, the flexible roof can be made into a curved surface with uniform tension distribution.

In the above embodiment, the cross section of the cylindrical joint α1 is oval, but as shown in FIG. 7, the cross section is circular, or as shown in FIG. A similar effect can be achieved by using the cylindrical joint α1. Furthermore, although the above embodiments have been described in the case where the present invention is applied to an air membrane structure, the same effect can be achieved even when applied to a tension membrane structure.

〔Effect of the invention〕

As explained above, in this invention, a plurality of cylindrical joints can be arranged separately between each segment of a flexible roof, so that uniform tension can be applied to each segment when forming a curved surface of a flexible roof. can be used to stabilize flexible roofs. Furthermore, since the cylindrical joint and the holding plate can be formed by press molding, there is also the effect that the cost of the joining joint can be reduced.

[Brief explanation of drawings]

Figure 1 is a perspective view showing an embodiment of this invention, Figure 2 (1)
~(C) is an explanatory diagram of the operation process during construction of the above embodiment, Fig. 6 is a rear view showing a part of the flexible roof using the above embodiment, and Figs. 4 and 5 are each a flexible roof. Fig. 6 is a front view of the multilayer cylindrical joint of the above embodiment;
7 and 8 are cross-sectional views showing six other embodiments, and FIG.
The figure is a perspective view of a conventional sealed structure using a metal membrane.
Figure 0 is a plan view of a conventional flexible roof in a flat state, Figure 11 is an explanatory diagram of a conventional flexible roof, Figure 12 is a sectional view of a conventional expansion joint, and Figure 16 is a conventional expansion joint. FIG. (1)...Flexible roof, (2)...Segment, (
3)...Central segment, α0, (IOA),
(10B)... Cylindrical joint, α... Holding plate.

Claims (2)

[Claims] (1) In a roofing material with a flexible membrane structure using a plurality of segments made of thin metal plates, a plurality of cylindrical joints made of elastic thin metal plates having a circular, oval or U-shaped cross section with slits; A joining joint for metal membrane structure roofing materials, characterized by comprising holding plates that insert and hold both ends of the slit of a cylindrical joint. (2) The cylindrical joint is divided in the longitudinal direction to provide a gap between the cylindrical joints, or a cylindrical joint with a trapezoidal longitudinal section is used and a V-shaped slit is provided between the cylindrical joints. A joining joint for a metal membrane structure roofing material according to item 1.