JP2511662B2 - Inflating method for membrane roof in air membrane structure - Google Patents

Description

TECHNICAL 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, deflating and assembling it. The present invention relates to a method for inflating a membrane roof that can safely inflate the membrane roof.

“Prior Art” A low-rise cable-reinforced air membrane structure means, for example, as shown in FIG. 3, a cable 2 is stretched from a compression ring 1 provided around a building in accordance with the building scale,
The membrane material 3 is stretched between the cables 2 to form a membrane roof, and a pressure (for example, 25 kg / m ² ) larger than the weight per unit area of the membrane roof is applied to the room to support the membrane roof with air pressure. It is a structure.

In the above structure, the stretching of the film material 3 is usually performed by jointing the ends of the cut film material 3 to the area surrounded by the cable 2 on the cable 2.

In the joint, as shown in FIG. 4, for example, the U-bolt 4 and the pressing plate 5 are attached to the cable 2 at predetermined intervals, and the pressing plate 5 is inserted and fixed in the large aluminum channel 6 to fix the large aluminum channel 6. It is not a plate part for the film material joint, and the end part of the film material 3,3 having rope edges 7,7 on this plate part is pressed with aluminum metal pieces 8,8 with bolts, so that the film material 3 Is fixed to the cable 2. In FIG. 4, 9 is a gasket, 10 is a waterproof neoprene rubber, and 11 is a condensation receiver.

"Problems to be Solved by the Invention" By the way, in such a conventional air film structure,
As shown in FIG. 2, when an attempt is made to inflate a membrane roof that has been deflated and assembled, free modes such as the one-dot chain line and the two-dot chain line occur.

This mode is theoretically unstable, and if an unfavorable mode as indicated by the chain double-dashed line occurs, the deformation of the cable does not follow well and the cable locally kinks (see Fig. 2). There is a problem that the film material is damaged due to (a).

By the way, as a means to solve such problems,
A pair of connecting hardware that is sufficiently longer than the diameter of the cable is hung at a distance larger than the diameter of the cable from the membrane mounting hardware, and a rolling roller is installed between the lower ends of both of the connecting hardware, and between the connecting hardware. Although it has been proposed that the cable behaves freely during inflation by passing it through a rolling roller and receiving it with a rolling roller (Shokai Sho 60-8936).
No. 7), this allows the cable to move even after the inflation is completed, and the wind causes fluttering in the film material, which causes impact, wear, damage, noise, short life, etc. And cause inconvenience that it adversely affects other places.

Therefore, the present invention makes it possible to safely, reasonably, and accurately inflate a deflated and assembled membrane roof by connecting the membrane mounting hardware side and the cable side via a rope of an appropriate length. After the inflation is completed, the rope is pulled to pull the membrane mounting hardware side and the cable side together so that they can be easily and easily combined and fixed. It is intended to wipe out.

"Means for Solving Problems" To achieve the above object, the present invention provides a membrane roof in a low-rise cable reinforced air membrane structure with a membrane mounting hardware side and a cable side when inflating from a deflated state. By connecting via an appropriate length of rope, inflate in a state where both are freely separated, and after this inflation is completed, pull the rope to draw the membrane mounting hardware side and the cable side in the separated state above. It is characterized by connecting and fixing.

When the undesired mode such as the local kink in the inflation of the membrane roof occurs or is likely to occur, it may be applied to the occurrence site. At the location, the rope has an appropriate length, bendability, etc. to ensure a freely separated state between the membrane attachment hardware side and the cable side during inflation, so that the behavior of the membrane material and the cable is Free each other and the membrane roof inflate in good mode.

The rope after the completion of inflation enables easy pulling between the membrane mounting hardware side and the cable side in a separated state by pulling, and enables simple and easy coupling and fixing between the two.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, in carrying out the present invention, the above-mentioned membrane material joint portion is slightly modified. First, at the center of the large aluminum channel 6 which constitutes the membrane mounting hardware, at a predetermined interval (U bolt 4) in the longitudinal direction.
The bolt insertion holes 12 are formed at a distance from each other (corresponding to the mounting pitch).

Next, presser plate 5 for U bolt 4 for mounting cable 2
A coupling bolt 13 is integrally erected from the center of the. In the illustrated example, the lower end of the coupling bolt 13 is screwed into the mounting hole 5a of the pressing plate 5.

And the above-mentioned metal fittings (large aluminum channel 6)
Connect between the connecting bolt 13 and the connecting bolt with a rope 14. In the illustrated example, the upper end of the rope 14 is a bolt insertion hole of the large aluminum channel 6.
12 and a lock nut 15 arranged above the bolt insertion hole 12
After the nut and the nut 16 have been inserted, it is processed to prevent removal (processing part 17
(See), the lower end of the rope 14 is inserted into the joint bolt 13 through the through hole 18 and then processed to prevent it from coming off (processed portion).
19). Since other configurations are the same as those in FIG. 4, the same members as those in FIG. 4 are denoted by the same reference numerals and detailed description thereof will be omitted.

With such a configuration, when inflating the membrane roof from the deflated state, first, the nut 16 is fastened to the coupling bolt 13 to inflate the membrane mounting hardware side and the cable side in a fixed state.

Next, if the initial kink phenomenon occurs in a part of the membrane roof near the inflection point of the membrane roof, at that part, the connecting bolt
Untighten 13 and nut 16 to separate the membrane mounting hardware side and the cable side, and inflate in this state. At this time, at the kink generation site, the behaviors of the membrane material 3 and the cable 2 are mutually free, and thus, a favorable mode of the membrane roof as shown by the one-dot chain line in FIG. 2 is obtained, The occurrence of an extreme kink in the cable 2 (see the part (a) in FIG. 2) is avoided.

Then, after the inflation is completed, the rope 14 is pulled from the upper part of the membrane at the kink generation site, and the connecting bolt 13
It is sufficient to bring in to the bolt insertion hole 12 of the large aluminum channel 6 and tighten the nut 16.

In the above-mentioned embodiment, when the kink occurrence point on the membrane roof can be predicted in advance, the membrane attachment hardware side and the cable side may be separated and inflated from the beginning at that portion. In addition, in the above case, the structure change of the membrane material joint portion described above can be performed only in the kink occurrence portion.

[Advantages of the Invention] According to the present invention, when inflating a membrane roof from a deflated state, when an undesired mode such as a local kink occurs, or when there is a fear of such an undesired mode occurring, It can be conveniently applied, and since the membrane mounting hardware side and the cable side are connected via a rope of an appropriate length, it is possible to attach the membrane by appropriate length and bendability of the rope. It is very easy to ensure a freely separated state between the hardware side and the cable side, and this allows the membrane roof to be inflated while the membrane-attached hardware side and the cable side are movably separated. During inflation, the behaviors of the membrane material and the cable are mutually free, a good mode of the membrane roof can be obtained, and it is possible to prevent the occurrence of undesired modes such as local kink in the cable, which is safe. It is possible to inflate properly and reasonably.

Furthermore, after the inflation is completed, the rope is pulled to pull the separated membrane mounting hardware side and the cable side together to fix them together, so that the membrane material after the completion of inflation does not flap due to wind or the like. No, of course
There is no impact, wear, damage, noise, short life, etc. due to flapping, and there is no adverse effect on other parts. And
The coupling and fixing can be performed simply and easily, and completely, reasonably and accurately.

[Brief description of drawings]

FIG. 1 is a structural view of a membrane material joint portion showing an embodiment of the present invention, FIG. 2 is an explanatory view of a mode of a membrane roof, FIG. 3 is an overall plan view of an air membrane structure, and FIG. 4 is a conventional plan view. It is a structural drawing of a membrane material joint part. 2 ... Cable, 3 ... Membrane material, 4 ... U bolt, 6 ... Large aluminum channel, 12 ... Bolt insertion hole, 13 ... Coupling bolt, 14 ... Rope, 16 ... Nut

Front page continuation (72) Inventor Yoshimitsu Uehara 8-21-1, Ginza, Chuo-ku, Tokyo Takenaka Corporation Tokyo Main Store (56) References

Claims (1)

(57) [Claims] 1. When inflating a membrane roof in a low rise cable reinforced air membrane structure from a deflated state,
By connecting the membrane mounting hardware side and the cable side via a rope of an appropriate length, the two are inflated in a state in which they can be freely separated, and after the inflation is completed, the rope is pulled to pull out the membrane in the separated state. A method for inflating a membrane roof in an air membrane structure, characterized in that the mounting hardware side and the cable side are pulled together and fixed together.