JPH0433348B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a roof membrane in a cable membrane structure.

(Prior Art) Generally, the roof membrane of a building with an air membrane structure is made of glass fiber cloth coated with Teflon (trade name), but the weft yarns in this membrane are less rigid than the warp yarns and are therefore easier to stretch. For this reason, the tension of the roof membrane supported by air pressure is not uniform due to the material properties of the weft and warp yarns, and there is a problem that the outer shape of the roof membrane is not uniform. This is noticeable in roof membranes with so-called non-cable air membrane structures supported by cables.

(Problem to be Solved by the Invention) As a method to solve the above problem, it is possible to shape the roof by dividing the roof membrane into extremely small pieces. This increases the number of parts to be sealed, which creates new problems that require more effort and time to process.

An object of the present invention is to minimize processing effort and time to obtain a uniform tension curved surface on a roof membrane.

(Means for Solving the Problem) In the present invention, the roof membrane is divided into a plurality of parts in the circumferential and radial directions centering on the top of the roof membrane, and the number of divisions is sufficient to form an equal tension curved surface over the entire surface of the membrane. It is something. Among the membrane pieces formed by dividing the above membrane, in the four membrane pieces whose corners are joined to form one overlapping part, two membrane pieces arranged diagonally The corners of the membrane pieces are notched, and the sides created by the notches of the corners are overlapped in a state in which they are in contact with each other in a plan view, so that the overlapping portion is made into three layers.

(Function) The radial dividing lines suppress the expansion of the roof membrane toward the outer periphery, creating equal tension over the entire surface of the membrane. In the case of four membrane pieces whose corners are joined to form one overlapping part, by stacking the overlapping part with three layers, it is prevented from becoming thicker than when simply stacking four membranes. can.

(Example) Examples of the present invention will be described below.

In FIGS. 1 and 2, the roof membrane 1 is bulged into a spherical shape, and this roof membrane is in a non-cable membrane structure supported only by air pressure. The structure of this roof membrane is centered around the top part 2.
It is divided into six equal parts in the circumferential direction by a dividing line 3 extending in the radial direction, and further divided into four parts at approximately equal distances in the radial direction by a dividing line 4 that draws a hexagon with the apex as the center. has been done. A dividing line 4 partitioning in the radial direction suppresses the extension of the roof membrane 1 toward the outer periphery, so that a uniform tension is applied to the entire surface of the roof membrane.

The bonding state of each membrane piece constituting the roof membrane 1 will be explained using the section A in FIG. 1 as an example.

As the structure of the joint portion, those shown in FIGS. 3 to 5 can be proposed. That is, the four membrane pieces 11, 12, 13, and 14 in this membrane piece joining part A form an overlapping part D (portion shown in stippling in FIG. 4) in which the four membrane pieces overlap at mutual corners. That is, there is a membrane piece 1 between the upper membrane piece 11 and the lower membrane piece 13.
4 and 12 are located, and these membrane pieces are attached to the welding tape 1
5, 16, and 17, and the four membrane pieces are connected to each other in an overlapping state at the overlapping portion D in FIG.

In the present invention, in order to prevent the roof membrane from becoming partially thick due to the stacking of four overlapping portions D as described above, the structure shown in FIGS. 6 to 8, for example, is adopted. That is, the membrane pieces 11a, 12
Among a, 13a, and 14a, membrane pieces 12a and 14a
When the opposite corners of are cut out and the membrane pieces are overlapped, the membrane pieces 12a and 14a are set at the same level, and the sides 121a and 141a created by the notches are
are in contact with each other in plan view, and the overlapping portion D1
It is arranged so that three sheets are stacked on top of each other. That is, in the overlapping portion D1, the membrane pieces 12a and 14a overlap in a sandwich-like pattern between the membrane pieces 11a and 13a. 15a, 16a, and 17a are welding tapes.

Furthermore, as shown in FIG. 9, the end of the roof membrane 1 is attached to a support base 7 fixedly installed on a beam 5 with anchor bolts 6, elastic plates 8 and 9, and sealing sheets 10 and 1.
A presser body 12 formed of an angle is fixed via a bolt 13 and a nut 14 via a bolt 13 and a nut 14.

In addition, if the roof membrane is divided into six parts in the circumferential direction along the dividing line 3 as in the above example, the amount of labor can be reduced, and moreover, a well-shaped roof membrane can be obtained. However, the divided structure may be divided into eight parts in the circumferential direction, for example, and is determined as appropriate depending on the scale of the roof membrane, and is not limited to the above example as long as uniform tension is applied to the roof membrane.

(Effects of the Invention) According to the present invention, the extension of the roof membrane toward the outer periphery is suppressed by the dividing lines in the radial direction, and uniform tension is generated over the entire surface of the membrane. A well-organized roof membrane can be obtained. In addition, since the overlapping portion of the four membrane pieces is made of three layers, it is possible to prevent the thickness from becoming thicker in some areas compared to simply stacking four membranes, and the increase in thickness in this area prevents the This makes it possible to reduce stress concentration and provide a roof membrane with a uniform outer shape.

[Brief explanation of drawings]

Fig. 1 is a plan view showing one embodiment of the present invention, Fig. 2 is a plan view showing one embodiment of the present invention;
The figure is a partially cutaway front view of Figure 1, Figures 3 to 5 show commonly considered examples of the joining structure of the membrane pieces in part A, Figure 3 is a developed view, and Figure 4 is a plan view. Fig. 5 is an exploded view of part A, Figs. 6 to 8 show examples of the joining structure of the membrane pieces of part A in the present invention, Fig. 6 is a developed view, Fig. 7 is a plan view, and Fig. 8 is a FIG. 9, which is an exploded view of part A, is an enlarged sectional view showing the supported state of the end of the roof membrane. 1... Roof membrane, 2... Top, 3, 4... Parting line, 11a to 14a... Membrane piece, 121a, 141
a...side, D1...polymerization part.

Claims (1)

[Scope of Claims] 1. The membrane is divided into a plurality of parts in the circumferential and radial directions centering on the top of the roof membrane, enough to form an equal tension curved surface over the entire surface of the membrane, and the membrane pieces formed by the divisions are Among the four membrane pieces whose corners are joined to form one overlapping part, the corners of the two membrane pieces arranged diagonally are cut out, and the above-mentioned A roof membrane in a non-cable membrane structure, characterized in that the sides formed by the notches at the corners are overlapped in a state in which they are in contact with each other in a plan view, and the overlapping portion is made into a three-layered structure. 2. A roof membrane in a non-cable membrane structure according to claim 1, characterized in that the roof membrane is divided into six parts in the circumferential direction.