JPH01169072A - Method for maintaining tension in opening and closing type film structure - Google Patents

Abstract

PURPOSE:To maintain the tension of a film material hung down from suspension materials by a method in which after suspension materials and a pressing cable are tensed, guiders are fixed to supporters to support the suspension materials. CONSTITUTION:Suspension cables are set in parallel at a given interval, and a film material is hung down through a hanging metal from strut cables hung down from the suspension cables. A pressing cable 13 is set on the film material in parallel between the suspension cables. Both ends of the cable 13 are connected movably along guide rails 25 on the tip of the horizontal beam 17. After the cable 13 is tensed by a jack 36, the rails 25 are erstrained to a fixed state by stoppers.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a novel composite membrane structure suitable for relatively large-span buildings, and more specifically to a suspension membrane structure in which the membrane material can be opened and closed. It concerns how tension is maintained in the body.

(Prior art and its problems) At present, the forms of membrane structures that are popular in shells include air membrane structures, suspension membrane structures, and framework membrane structures.

However, with the air membrane structure, it is necessary to constantly blow air to maintain the membrane surface shape, making maintenance extremely complicated and costly, making it economically unsuitable for buildings with small to medium spans of 100 m or less. have a problem

In addition, in the case of a strut type suspension membrane structure, the struts may get in the way depending on the application, and in the case of a single arch type, the stability of the arch may be affected due to unbalanced tension distribution on both sides of the arch. There is also the problem that it becomes difficult to obtain the independence of the support frame.

Next, FIG. 13 shows an example of the above-mentioned frame membrane structure, in which a membrane material 3 is stretched over the upper surface of a self-supporting frame l such as a three-dimensional truss via a secondary member 2.

In such a frame-type membrane structure, when the membrane surface made of the membrane material 3 is stretched on the grid of the three-dimensional truss type frame 1 as in the example shown in FIG. Since the applied wind pressure is borne by the frame 1 via the point support, it is difficult to expect sufficient strength.In addition, when using a line support method along the frame 1, it is difficult to maintain the shape of the membrane surface. In order to prepare for deformation contact, an extra secondary member 2 is required, which makes it difficult to obtain economic efficiency from the frame material, and furthermore,
The membrane material 3 is small in size and curvature as a structural membrane, and rather serves as a translucent finishing material such as glass or acrylic, which only has the function of covering the upper surface of the frame l as a structural material, which the membrane structure should originally have. There is a problem in that it cannot be said that the tension resistance system by the membrane surface is fully utilized.

In addition, in the above-mentioned conventional membrane structure structures, improvements have been made to improve the lighting conditions by devising the material of the membrane material, but the openness of the space especially when used as a sports facility has been improved. I had a problem with this.

The present invention was developed in view of the above-mentioned conventional problems, and combines the advantages of each of the above-mentioned membrane structures. The purpose of this invention is to provide a method for maintaining tension in a suspension membrane structure in which the membrane material can be opened and closed, based on a novel composite membrane structure.

(Means for Solving the Problems) In order to achieve the above object, a method for maintaining tension in a retractable membrane structure according to the present invention includes suspension members arranged approximately parallel or radially, and each suspension member. A membrane material suspended downward from multiple locations of the material by wire members,
A holding cable is provided on the membrane material in the same direction as each suspension material at an intermediate position between the suspension materials, and applies tension to the membrane material, and the membrane material is opened and closed by a predetermined drive device. The suspension members and both ends of the Meishin cable are movable along guide members connected to support members at both ends and continuous in the column direction, and a predetermined tension device is used to tighten the guide members to the membrane. An opening/closing type in which tension is introduced into the membrane material by moving it in a direction perpendicular to the opening/closing direction of the membrane material and tensioning either or both of the suspension material and the holding cable connected to the guide member. A method for maintaining tension in a retractable membrane structure, characterized in that, in the membrane structure, the tension of the membrane material is maintained by fixing the guide member to the support member at the moved position after tensioning. .

(Example) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 to 10 show an embodiment of the present invention, FIG. 1 is a perspective view of a main part of a membrane structure according to this embodiment, and FIG. 2 is a plan view showing a schematic configuration of the membrane structure. , FIG. 3 is a side view of FIG. 2, FIG. 4 is a sectional view taken along line 8-Δ, and FIG. 5 is an end view showing the planar configuration of the membrane material.

As shown in FIG. 1, the suspension membrane structure according to this embodiment includes a suspension cable 10 as a suspension material, a strut cable 11 as a wire material,
It comprises a membrane material 12 and a holding cable 13.

The suspension cables 10 are arranged in parallel at predetermined intervals, and have a downwardly curved arc shape as shown in FIGS. 1 and 4.

From each suspension cable 10, in this embodiment, 7
A plurality of strut cables 11 are suspended downward, and a membrane material 12 is suspended by each strut cable 11 via a hanging fitting 11a.

Further, at an intermediate position between each suspension cable 10, a holding cable 13 is disposed on the membrane material 12 in parallel with the suspension cable 10, and each suspension cable 10 and each holding cable 13 are connected at their terminal portions. Tension is introduced into the membrane material 12 by applying tension to one or both of them.

Further, in FIGS. 2 to 5, reference numeral 14 indicates a girder arranged in the direction of the column at both ends of the suspension cable 10, and reference numeral 15 indicates a truss arranged at both ends of the structure in the direction of the column, which resists horizontal force. The type of stiffeners 16 are pillars placed at both ends of each suspension cable 10, and from the pillars 16, horizontal members 17 and auxiliary pillars 18 are arranged to protrude outward. A first reinforcing wire 19 and a second reinforcing wire 20 are arranged to form a truss as shown in FIG.

In addition, as shown in FIGS. 3 and 5, the presser cable 13
Beam members 2 installed between the columns 16 and 16 are located at both ends of the column.
1 are arranged between the upper and lower ends of the pillar material 16 and the beam materials 21 at both ends of the holding cable 13, respectively.
23 is stretched.

Further, as shown in FIG. 5, wire members 24 are stretched between the beam members 21 at both ends of the holding cable 13 and the tip of the horizontal member 17.

Therefore, in this embodiment, each suspension cable 10
A sliding device and a tensioning device as shown in FIGS. 6 to 8 are attached to both ends of the holding cable 13 and both ends of each holding cable 13.

That is, taking the example of the end of the holding cable 13 as shown in FIG. It is placed protrudingly in the holding position.

Further, in FIGS. 6 to 8, 25 is a guide rail as a sliding device, and the guide rail 25 includes a roller 27 that engages with a protruding rail 26, a rotating shaft 28 thereof,
It is connected to the holding cable 13 via a connecting member 29 and a connecting tool 30 connected to the rotating shaft 28.

Therefore, the presser cable 13 is movable along the longitudinal direction (row direction) of the guide rail 25 by sliding of the roller 27.

Further, the guide rail 25 is connected to the tip portion 1 of the horizontal member 17.
At the position 7a, the horizontal member tip 17 is moved by each sliding member 31.
It is slidably fixed in the axial direction of a.

That is, as shown in FIG. 8, the sliding member 31 is fitted into and abuts a gripping portion 32 that grips the outer peripheral portion of the guide rail 25 and the outer peripheral surface of the horizontal member tip portion 17a made of a round steel pipe. The distal end portion 1 of the horizontal member is provided with a ring-shaped slide portion 33, which is pulled in the left direction in FIG.
It is slidable along the outer peripheral surface of 7a.

Note that, as shown in FIG.
6, a clearance L sufficient to apply a predetermined tension to the holding cable 13 is secured, as will be described later.

Next, a gusset plate 3 is attached to the outer end of the gripping portion 32.
4 are integrally formed, and a tension bolt 35, one end of which is joined to the plate 34, is slidably passed through the column 16. Electric center hole jack 36 as a tensioning device placed on the outer horizontal member 17 of
It passes through the inside of the jack 36 and projects outward by a predetermined distance.

Therefore, the holding cable 13 can be tensioned and relaxed by remote control from the ground position via the tension bolt 35 and the guide rail 25 by the jack 36.

In this embodiment, as conceptually shown in FIG. 10, the ends of the pair of L-shaped stopper members 38 are
The stopper member 38 is rotatably mounted on both sides of the stopper member 38 in FIG.
In a), it can be rotated in the vertical direction in the figure from the ground position.

Therefore, when moving the presser cable 13 to open and close the membrane material 12, the stopper member 38 is positioned at the position shown by the imaginary line in FIG. close the membrane material 12 and
When tensioning the holding cable 13 at a predetermined position, the stopper member 3
8 downward to fix the guide rail 25 to the tip end 17a of the horizontal member at the tensioned movement position, as shown by the solid line in Figure 1O(a), and release the tension of the jack 36. Even if the guide rail 25 is moved, it can be restrained by the tensile force from the presser cable 13 so that it does not move.

Further, the guide rail 25 includes a first guide rail 25
a and the second intermediate portion between each node 1 guide rail 25a.
It is separated from the guide rail 25b and joined by a pin 37.

Further, in this embodiment, the horizontal member 17 is arranged in advance so as to be inclined with respect to the horizontal direction so as to match the inclination angle θ that the presser cable 13 makes with respect to the horizontal direction during tensioning, and the horizontal member 17 is arranged so as to be inclined with respect to the horizontal direction. It is set so that undesirable stress such as bending moment does not act on the rail 25, sliding member 31, jack 36, etc.

Note that the configurations of the guide rail 25, tension device 35, etc. described above are the same at the end portions of the suspension cable 10 (not shown).

Further, in this embodiment, by driving the stiffener 15 disposed at one end in the column direction in the column direction by a predetermined drive device, the membrane material 15 along with each suspension cable 10 and presser cable 13 is It can be opened and closed freely.

In the suspension membrane structure according to this embodiment having such a configuration, first, when the suspension cable IO or the presser cable 13 is tensioned, the guide rail 25 is moved by the jack 36 to the position shown by the solid line in FIG. By pulling and moving outward from the position along the horizontal member tip 17a to the tensioned position shown by the imaginary line in the figure, the suspension cable 10, the suspension cable 10, and the holding cable 13 connected to the guide rail 25 are removed. I try to add tension to one or both of them.

Therefore, the design capacity of the jack 36 can be set economically by restraining the guide rail 25 by the stopper member 38 and fixing it at the same time as the tensioning work by the jack 36 is completed.

That is, regarding the performance of the jack 36, if only tension is introduced into the suspension cable 10 or the holding cable 13, in this embodiment, it is sufficient that the jack 36 can withstand a tensile force of, for example, about 3 to 4 tons. However, during snowfall or strong winds, a large load is applied to the membrane material 12, and at this time, a very large tensile force acts on the jack 36 via the suspension cable 10 and the holding cable 13, and in this example, the tensile force is 40 tons. degree), the jack 36 is required to have sufficient performance to maintain the tensile capacity to withstand this.

However, with the configuration of this embodiment, the jack 36 only needs to have the performance necessary for introducing the tension during tension, and after the guide rail 25 is fixed with the stopper member 38, the Since the stopper member 38 can counteract the snow load and wind front type,
Regarding the jack 36, there is no problem even if the tensile force is released, and an extremely economical design is possible. Furthermore, since the stopper member 38 can be operated from the ground position, the opening/closing operation can be simplified.

Note that the structure of the stopper member 38 is not limited to the above embodiment, and for example, a rod-shaped bottle that can be electrically operated in the vertical direction is disposed inside the guide rail 25 so that the stopper member 38 can be operated when the membrane material 12 is opened or closed. Alternatively, during tensioning work using the tensioning device 36, the bin may be stored in the horizontal member 17 as a support member, and after tensioning, the bin may be protruded to fix the guide rail 25 in a restrained state. Other suitable configurations can be adopted.

Further, although the above embodiment shows an example in which the suspension cables 10 are arranged parallel to each other, there are other cases in which the suspension cables 10 are arranged parallel to each other, for example, as in the embodiment shown in FIGS. 11 and 12. It is also possible to arrange them approximately radially; in this case, the cables 13 may be arranged in the same direction as the suspension cables 10 at an intermediate position between the suspension cables 10.

Further, the tensioning device 36 and the stopper member 38 may be placed at either end of the suspension cable 10 and the holding cable 13 instead of being installed at both ends.

Further, as the suspension material, instead of the cable 10, a beam material having rigidity such as a single steel pipe may be used, or other suitable materials may be used.

Furthermore, the present invention is not limited to the above embodiments,
It is understood that various modifications are possible without departing from the gist of the present invention, such as the spacing and span between each suspension cable 10, the number of strut cables, etc., which can be changed as appropriate according to design conditions. Needless to say.

(Effects of the Invention) The present invention is configured as described above, and when the suspension material or the holding cable is tensioned.

A tension device is used to move the guide member in a direction perpendicular to the opening/closing direction of the membrane material, and tension is applied to the membrane material by tensioning either or both of the suspension material described in 1iiJ and the holding cable connected to the guide member. In addition, by fixing the guide member to the support member at the position after tensioning and maintaining the tension of the membrane material, the load required on the tensioning device is reduced, and the tension required for the tensioning device is reduced. There is no problem even if the tensioning force of the tensioning device is released.
This allows extremely economical design.

7th note')? What a theory! 4. Details of FIGS. 1 to 9 1j An embodiment of the present invention is shown, FIG. 1 is a perspective view of a main part of a membrane structure according to this embodiment, and FIG. 2 is a perspective view of the membrane structure. Fig. 3 is a side view of Fig. 2, Fig. 4 is a sectional view taken along line 8-Δ, Fig. 5 is an end view showing the planar structure of the membrane material, and Fig. 6 is a sliding view. A conceptual diagram showing an example of a device and a tension device, FIG. 7 is a plan view of FIG. 6, FIG. 8 is an enlarged view of the main part of the activity device, FIG. 9 is an enlarged view of the main part of the guide material,
10(a) and 10(b) are conceptual diagrams each showing an example of the structure of a stopper member, FIGS. 11 and 12 are conceptual diagrams showing other embodiments of the present invention, and FIG. 13 1 is a conceptual diagram showing an example of a conventional framework membrane structure.

10... Suspension material, 11... Wire material (strut cable), 12...
Membrane material, 13... Holding cable.

16... Column body, 17... Horizontal member, 17a... Horizontal member tip, 25... Guide rail, 27... Roller, 35... Tension bolt, 36... Jacket , 37...pin.

38...One stopper member.

Claims (1)

[Claims] Suspension members arranged approximately parallel or radially; membrane members suspended downward from multiple locations of each suspension member by wire members; a holding cable disposed on the membrane material in a direction and applying tension to the membrane material, the membrane material can be opened and closed by a predetermined drive device, and both ends of each of the suspension members and each holding cable are provided. is movable along guide members connected to support members at both ends and continuous in the column direction, and moves the guide member in a direction perpendicular to the opening/closing direction of the membrane material by a predetermined tension device, and In the retractable membrane structure, in which tension is introduced into the membrane material by tensioning either or both of the suspension material and the holding cable connected to the member, the guide is placed in the movement position after tensioning. A method for maintaining tension in a retractable membrane structure, characterized in that the tension in the membrane material is maintained by fixing the member to the support member.