JPS63171970A - Inflating method of film roof in air film structure - 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 method for inflating a membrane roof in an air membrane structure, and more specifically, when constructing a low rise cable reinforced air membrane structure, the invention relates to a method for deflating and assembling a membrane roof in an air membrane structure. The present invention relates to a method for inflating a membrane roof, which allows the membrane roof to be inflated safely.

``Prior art'' The low-rise cable reinforced air membrane structure is, for example, as shown in Fig. 3, in which cables 2 are stretched from a combrella silane ring l provided around the building according to the scale of the building. A membrane material 3 is stretched between the cables 2 to form an n+ membrane roof, and a pressure greater than the weight per unit area of the membrane roof (for example, 25 kg/r+f) is applied to the chamber to pneumatically pressurize the membrane roof. The structure is supported by

In the above structure, the tensioning of the membrane material 3 is usually done by cutting the ends of the membrane material 3 into the area recessed by the cable 2 on two wires of the cable. .

For example, as shown in FIG.
At the same time, insert and fix the holding plate 5 into the large aluminum channel 6.
is used as a plate part for the membrane material fixing point, and on this plate part, the end part of the membrane material 3.3 having the rope f-shift, 7 is held down with bolts by the aluminum hardware 8.8, so that the membrane material 3 is It is fixedly attached to the cable 2. In FIG. 4, 9 indicates a gasket, 10 indicates waterproof neoprene rubber, and 11 indicates a condensation catcher.

``Problems to be solved by the invention'' By the way, with such a conventional air membrane structure, as shown in Figure 2, when trying to inflate a membrane roof that has been assembled by deflating, there is one problem. A free mode is generated as shown by the one-dashed line and the two-dot chain line.

This mode is theoretically an unstable state, and if an unfavorable mode as shown by the two-dot chain line occurs, the cable deformation will not follow suit and the cable will locally kink (see Figure 2). There was a problem that the membrane material could be damaged due to (part (a)).

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for inflating a membrane roof that can safely inflate a membrane roof that has been deflated and assembled.

"Means for Solving the Problems" In order to achieve the above object, the method for inflating a membrane roof according to the present invention includes the following steps when inflating a membrane roof in a low rise cable reinforced air membrane structure from a deflated state: It is characterized in that the membrane mounting hardware side and the cable side are inflated in a separated state, and after this inflation is completed, the membrane mounting hardware side and the cable side in the separated state are fixed.

"Operation" According to the above method, during the inflation of the membrane roof, the membrane material and the cable behave freely relative to each other, so that the membrane roof is inflated in a good mode.

"Example" An embodiment of the present invention will be described below based on the accompanying drawings.

As shown in FIG. 1, in carrying out the present invention, some structural changes are made in the above-mentioned membrane material alignment section. First, bolt insertion holes 12 are bored in the center of the large aluminum channel 6 constituting the membrane mounting hardware at predetermined intervals (corresponding to the mounting pitch of the U-bolts 4) in the longitudinal direction.

Next, in the illustrated example in which the connecting bolt 13 is integrally erected from the center of the holding plate 5 of the U-bolt 4 for attaching the cable 2, the lower end of the connecting bolt 13 is screwed into the mounting hole 5a of the holding plate 5. ing.

In the illustrated example in which the membrane mounting hardware (large aluminum channel 6) and the coupling bolt 13 are connected by a rope 14, the upper end of the rope 114 is connected to the bolt insertion hole 12 of the large aluminum channel 6 and above the bolt insertion hole 12. After passing through the retaining nuts 15 and 16 arranged in the row 114, it is machined to prevent it from coming out (see processed part 17), and after the lower end of the row 114 penetrates the through hole 18 drilled in the connecting pole 13. Since the other configurations are the same as those shown in FIG. 4, such as being processed to prevent slipping out (see processed portion 19), the same members as in FIG. 4 are given the same reference numerals and detailed explanations are omitted.

With this structure, when the membrane roof is inflated from the deflated state, the nut 16 is first tightened on the coupling bolt 13, and the roof is inflated while the protective mounting hardware side and the cable side are fixed.

Next, when an initial kink phenomenon occurs in a part of the membrane roof near the recursion point, the bonded pol H3
The membrane mounting hardware side and the cable side are separated by unfastening the nut 16, and inflation is performed in this state. At this time, the behavior of the membrane material 3 and cable 2 is different from each other at the kink occurrence site. As a result, a good mode of the membrane roof as shown by the dashed line in Fig. 2 is obtained, and the occurrence of a kink at the end of the cable 2 (see part (a) in Fig. 2). ) is avoided.

After the inflation is completed, the rope 14 is pulled from the upper part of the membrane at the kink occurrence site, and the connecting bolt 1
3 into the bolt insertion hole 12 of the large aluminum channel 6 and tighten the nut 16.

In addition, in the above embodiment, if the location where kink occurs in the membrane roof can be predicted in advance, the membrane mounting hardware side and the cable side may be separated from the beginning at that location and inflated. In this case, the above-mentioned structural change of the membrane joint can be made only at the location where the kink occurs.

"Effects of the Invention" As explained above, according to the present invention, the n+ membrane roof is inflated with the I cost mounting hardware side and the cable side separated, and after the inflation is completed, the membrane number hardware side in the separated state. Since the cable side and the cable side are fixed, the behavior of the membrane material and cable are mutually free during inflation, resulting in a good mode of the membrane roof, and preventing the occurrence of local kings in the cable. can.

[Brief explanation of the drawing]

Fig. 1 is a structural diagram of a membrane joint part showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the mode of the membrane roof, Fig. 3 is an overall plan view of the air membrane structure, and Fig. 4 is a conventional FIG. 3 is a structural diagram of a membrane material jisting portion. 2... Cable, 3... Membrane material, 4... U bolt, 6... Large aluminum channel, 12... Bolt insertion hole, 13... Connection bolt, 1
4... Rope, 16... Nut Figure 1 Figure 2

Claims (1)

[Claims] When inflating a membrane roof in a low-rise cable-reinforced air membrane structure from a deflated state, the membrane mounting hardware side and cable side are inflated in a separated state, and after this inflation is completed, the membrane is installed in the separated state. A method for inflating a membrane roof in an air membrane structure characterized by fixing a hardware side and a cable side.