JPH0322447Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial Application Field" This invention relates to a mechanism for introducing tension at the end of a membrane on a beam in a suspension membrane structure.

``Prior art'' In a suspension membrane structure, the membrane is passed between beams and the membrane ends are fixed on the beams, but as a means for fixing the membrane ends so that the tension can be adjusted, there is generally a third method.
As shown in Figures a and b, the ends of the membrane material 1 are folded back and welded 2 to form a bag 3, a pipe 4 etc. is passed through the bag 3 to form a reinforcing edge frame, and the edges are installed at appropriate pitches. Attach the retractor 5 to the cutout 6,
The retractor 5 is moved in the tension application direction by rotating a threaded rod 5a attached to the beam attached to the retractor 5.

``Problems that the invention attempts to solve'' However, the narrative structure has the following difficulties.

The stronger the degree to which the pipe 4 is pulled in (the greater the membrane tension), the more force is generated that tries to separate the welded membrane material 1 at the portion A. In this case, the welded part 2 shows breakage properties due to peeling, but in the case of polytetrofluoroethylene coated glass fiber cloth, the peeling strength of the welded part is extremely low, so this method poses a problem when the membrane tension is large. .

Due to the presence of the notch 6, it has the disadvantage that it is difficult to shut it off from the rain.

``Means for solving problems'' and ``effects'' This proposal was made in view of the circumstances described above, and its gist is to erect a plate of bolt threading material on the top of the beam, and A bolt receiving plate that penetrates and receives the tip of the bolt is erected on the side where the membrane material is present, a bolt is installed between the plate and the bolt receiving plate, and the bolt is freely mounted on the upper end of the bolt receiving plate. A fixed nut is screwed and assembled to the lower surface of the membrane end fixing plate as a pass-through material, and a holding plate that is crimped with a holding bolt is placed on the membrane end fixing plate. is folded back to form a bag portion and welded, a rope is enclosed in this bag portion to form a souped edge, and the membrane end is held between the membrane end fixing plate and the holding plate, and the membrane is attached by bolt operation. Tension can be introduced by adjusting the movement of the end fastening plate, and it is possible to introduce tension into the membrane while ensuring the maximum strength of the membrane edge that can be considered at present, and it is possible to introduce tension into the membrane. It is extremely easy to operate, highly reliable, and there is little concern about rainwater.

"Example" This will be described in detail below based on the drawings. Figure 1 is a longitudinal cross-sectional view of the proposed mechanism, Figure 2 is Figure 1 A-A
In the arrow-oriented view, 7 indicates a steel pipe of the upper chord of the girder, and a plate 8 for bolt attachment is erected by welding 9 on the top of the steel pipe 7.

Since the plate 8 is a through material, the bolt is inserted through the bolt by locking the head thereof. Reference numeral 10 denotes a bolt receiving plate located on the side where the membrane material to which tension is to be introduced is located, facing the plate 8 and provided at a predetermined spacing in accordance with the bolt to receive the bolt; The plate 8 is erected on the steel pipe 7 by welding 12 via rib members 11 on both sides.

Further, the upper end is bent and horizontally processed 10a for a membrane end fixing plate to be mounted on the upper end, which will be described later. 13 is the above-mentioned bolt passed between plates 8 and 10, as shown in FIG.
13a
is a locking nut added to the bolt 13 for fixation. A membrane end fixing plate 14 is mounted on the plate 10. The plate 14 is a through material. There is a nut 15 on the inside of the lower surface of the plate 14.
is fixed by welding, and this is the bolt 13
be assembled into.

Thus, by rotating the bolt 13, the plate 14 can be displaced from side to side in FIG. 1, and tension can be introduced with an extremely simple operation. After the tension is introduced, when the locking nut 13a is tightened against the plate 8, the rotation of the bolt 13 is stopped.

In this case, the end portion of the membrane material 1 fixed on the plate 14 is different from that shown in FIG. 3. That is, the end portion of the membrane material 1 is folded back to form a bag portion and welded, and a rope is enclosed in this bag portion to form a rope edge 1a without a notch.

A bolt penetration hole is drilled in the welded portion of the rope edge 1a, and the welded portion is clamped by a presser plate 16 which also has a hole, thereby creating a stopping structure in which the rope edge 1a is locked. In the figure, 17 is a holding bolt.

With the above configuration, there is no peeling effect on the welded part, so there is no fear of damage caused by this, and since there is no notch at the membrane edge and it is crimped and sealed, it can be sealed in the rain. There is no need to worry about this.

In the figure, reference numeral 18 denotes a gasket in the space at the end of the membrane, which is made up of a chloroprene rubber seal 18a whose one end is stopped by a presser plate 16, and whose other end is chucked 18c to a chloroprene rubber block 18b.

Therefore, in the case of the proposed mechanism, the bolt 13 is rotated with a spanner to introduce a predetermined tension, and then fixed with the nut 13a, and then the gasket 18 is set to complete the construction, and the tension is reintroduced by This is done by removing the gasket 18 to open it, loosening the nut 13a, and then rotating the bolt 13 in the tension introducing direction.

"Effects of the Invention" As described above, according to the present invention, it is possible to introduce tension, including re-introduction, with an extremely simple operation while ensuring the strength of the membrane end, and it is easy to shut off the membrane from rain.

[Brief explanation of the drawing]

Figures 1 and 2 are longitudinal sectional views of the proposed mechanism, Figure 1A
-A arrow view, Figures 3a and b are planes of the conventional mechanism;
FIG. 1... Membrane material, 2... Welded part, 3... Bag, 4...
Pipe, 5... Retracting tool, 6... Notch, 7...
Steel pipe, 8... Plate, 9... Welding, 10... Bolt receiving plate, 11... Rib material, 12... Welding, 13... Bolt, 14... Plate, 15...
...Nut, 16... Holding plate, 17... Holding bolt, 18... Gasket.

Claims (1)

[Scope of utility model registration request] At the top of the beam, a plate of bolt threading material is erected,
A bolt receiving plate that penetrates and receives the tip of the bolt is erected on the side where the membrane material is present, and a bolt is installed between the plate and the bolt receiving plate, and the bolt is freely attached to the upper end of the bolt receiving plate. A fixed nut is screwed onto the lower surface of the mounted membrane end fixing plate as a through member, and a holding plate crimped with a holding bolt is placed on the membrane end fixing plate, and on the other hand, The membrane end is folded back to form a bag portion and welded, a rope is enclosed in this bag portion to form a souped edge, and the membrane end is held between the membrane end fixing plate and the holding plate. Mechanism for introducing tension at the end of the membrane on the beam in the characteristic suspension membrane structure.