JPH0735672B2 - Method of introducing tension in openable membrane structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of introducing tension to a film material in a suspension film structure capable of opening and closing the film material.

(Prior Art and Problems to be Solved by the Invention) At present, there are an air membrane structure, a suspension membrane structure, and a skeleton membrane structure as the form of the membrane structure that is generally popular.

Such a conventional structure having a membrane structure has been improved so as to improve the lighting conditions by devising the material of the membrane material, but the openness of the space is particularly important when used as a sports facility. Had a problem with.

Therefore, recently, a structure has been proposed in which the roof surface of the membrane structure can be opened and closed as needed, but in a suspension type membrane structure, it is important to fully utilize the tension resistance of the membrane material. In the method of folding the membrane material itself to the open state and stretching the membrane material to the original closed state, it is necessary to introduce tension into the membrane material every time the open state is returned to the closed state. Become.

Therefore, in the above-mentioned method of opening and closing the film material itself,
Rationality and ease of operation are required for the structure for introducing tension into the membrane material.

The present invention was developed in view of the above-mentioned conventional problems, and provides a tension introducing method for a retractable membrane structure based on a novel composite membrane structure, which combines the advantages of each of the above membrane structures. The purpose is to

(Means for Solving the Problems) In order to achieve the above-mentioned object, a tension introducing method in an opening / closing type membrane structure according to the present invention includes a suspension member arranged substantially in parallel or substantially radially, and each suspension member. A film material hung downward from a plurality of locations by a lifting material, and a presser which is arranged on the film material in the same direction as each suspension material at an intermediate position between the suspension materials and applies a tension force to the film material. In an openable membrane structure including a cable, a continuous linear member is arranged along the suspension member, a first pulley is arranged at the upper end of each lifting member, and each lifting member is lifted. A pair of second pulleys each fixed to the suspension material is arranged at a position directly above the material, and the linear material is provided from one of the second pulleys to the second of the other via the first pulleys. Engage with pulley So that the ends of the filament material are connected to tensioning devices arranged at both ends or one end of the suspension material, and the tensioning device winds the filament material. Thus, each of the lifting members is simultaneously pulled up by a predetermined distance to introduce a predetermined tension to the film material.

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

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

As shown in FIG. 1, the suspension membrane structure according to this embodiment includes a suspension cable 10 as a suspension material and a strut cable 11 as a lifting material.
A film material 12 and a presser cable 13.

The suspension cables 10 are arranged in parallel at a predetermined interval and have an arc shape curved downward as shown in FIGS. 1 and 4.

In this embodiment, seven strut cables 11 are suspended from each suspension cable 10, and a film material 12 is suspended by each strut cable 11 via suspension metal fittings 11a.

In addition, at the intermediate position between each suspension cable 10,
A pressing cable 13 is arranged on the membrane material 12 in parallel with the suspension cable 10 on a plane, and each suspension cable 10 is provided with a tensioning means described later so that the tension force is applied to the membrane material 12 via the strut cable 11. It gives power.

Further, in FIGS. 2 to 5, 14 is a girder member arranged in the girder direction at both end positions of the suspension cable 10,
15 is a truss type stiffening material that is arranged at both ends of the structure in the column direction and that opposes the horizontal force, and 16 is a pillar material that is arranged at both end positions of each suspension cable 10. The horizontal member 17 and the auxiliary column member 18 are arranged so as to project outward, and the first reinforcing wire 19 and the second reinforcing wire 20 are arranged on this to form a truss as shown in FIG.

Further, as shown in FIGS. 3 and 5, at both ends of the presser cable 13, beam members 21 installed between the pillars 16 and 16 are arranged, and the upper and lower ends of the pillar members 16 and the presser foot are held. Brace members 22 and 23 are stretched between the beam members 21 at both ends of the cable 13.

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

Further, in this embodiment, both end portions of each suspension cable 10 and both end portions of each holding cable 13 are supported by a predetermined sliding device (not shown) at both ends (for each suspension cable 10, the girder member 14, each holding cable 13). Can be slid along the beam 21) in the girder direction.

Therefore, in this embodiment, by driving the stiffening member 15 arranged at one end in the column direction toward the other end in the column direction by a predetermined driving device, each suspension cable 10 and the presser foot are pressed. The film material 12 can be opened and closed together with the cable 13.

Thus, in this embodiment, the tension introducing means for the film material 12 as shown in FIGS. 6 and 7 is provided.

That is, one continuous line member 30 is arranged along the suspension cable 10, and the first strut cable 11 is provided at the upper end thereof with a rotary shaft 31 and a shaft support rod 32, respectively.
A pulley 33 is rotatably arranged.

A support member 34 is fixed to the suspension cable 10 at a position directly above each strut cable 11, and a pair of bearing plates 35 and a rotating shaft 36 that are integrally formed with the support member 34 make a pair of first and second support plates 35 and 35, respectively. Two pulleys 37 are rotatably arranged.

At the position of each strut cable 11, the linear member 30 is hung down after engaging with one of the second pulleys 37 as shown in the drawing, and then hung down via the respective first pulleys 33 to the second respective second pulleys 37.
Sequentially extended to engage the pulley 37, and
The ends of the linear member 30 are connected to predetermined tensioning devices arranged at both ends of the suspension cable 10.

In the present embodiment, the tensioning device is composed of a forward / reverse rotatable motor 40 and a winding pulley 42 coaxially arranged along its rotation shaft 41 as shown in FIG. Material 30
Is connected to the winding surface of the pulley 42,
Is remotely controllable from the ground position.

Therefore, as shown in FIG. 6, by winding the filament material 30 in the direction of the arrow in the drawing by the tensioning device, the filament material 30
The strut cables 11 through the first pulleys 33.
When both are simultaneously pulled up by a predetermined distance, a tension force is applied to the suspension cable 10 and the pressing cable 13, so that a predetermined tension can be introduced into the membrane material 12 by the strut cable 11.

Further, when the film material 12 is opened, the tension of each suspension cable 10 and the presser cable 13 is released to release the film material.
It is necessary to loosen 12 and then move each suspension cable 10 and presser cable 13 together with the membrane material 12 in a predetermined direction.

In this case, if the motor 40 of the tensioning device is rotated in the reverse direction of the above tensioning, each strut cable 11 moves downward due to the weight of the film material 12, the presser cable 13, etc., and each suspension cable 10 and presser foot is pressed. The tension of the cable 13 can be released and the film material 12 can be relaxed.

Incidentally, when the film material 12 is changed from the open state to the closed state again, the tension may be applied to the film material 12 again in the same manner as the initial tension introduction described above.

As described above, in the present embodiment, the work of introducing the tension to the membrane material 12 can be efficiently performed in a short time, and further, can be performed by remote control from the ground position.

Further, except when the film material 12 is opened and closed, since the film material 12 is always tensioned by the tensioning device via each strut cable 11 as a result of the aging creep phenomenon or the like occurring in the film material 12. Also, the tension of the membrane material 12 does not relax, so that it is not necessary to re-tension the membrane material 12 as in the conventional membrane structure, which is rational and economical in terms of maintenance management.

Note that the wire member 30 may be provided with tensioning devices at both ends thereof as in the above embodiment, or only one end may be operated by the tensioning device.

Further, in the above-described embodiment, an example in which the suspension cables 10 are arranged in parallel with each other has been shown. However, in addition to this, for example, as shown in FIGS. 9 and 10, the suspension cables 10 are mutually connected. It is also possible to arrange them substantially radially, and in this case, each holding cable 13 may be arranged in the same direction as the suspension cable 10 at an intermediate position between the suspension cables 10.

Further, as the tensioning device, other than the one shown in the above-described embodiment, an appropriate tensioning device capable of exhibiting the same effect can be used, and as the suspension material, a predetermined material other than the cable material 10 is formed. A cable material or the like having rigidity can be used.

Further, the present invention is not limited to the above-mentioned embodiment, and the material of the linear member 30, the distance between the suspension members, the span, the number of strut cables, and the like can be appropriately changed according to the design conditions. Needless to say, various modifications can be made without departing from the scope of the present invention.

(Advantages of the Invention) The present invention is configured as described above, in which one continuous linear member is arranged along the suspension member, and the first pulley is arranged at the upper end of each lifting member. A pair of second pulleys fixed to the suspension member are arranged directly above the hoisting members, and the linear member extends from one of the second pulleys to the other of the second pulleys via the first pulleys. The tension members are sequentially extended so as to be engaged with the respective second pulleys, and the ends of the linear member are connected to tensioning devices arranged at both ends or one end of the suspension member. By winding the wire material, the lifting materials are simultaneously lifted upward by a predetermined distance to introduce a predetermined tension into the film material, thereby shortening the work of introducing tension into the film material. Something that can be done efficiently in time is there.

Further, even when a creep phenomenon occurs in the membrane material, it is not necessary to re-tension the membrane material, which makes the maintenance and management rational and economical.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention, FIG. 1 is a perspective view of an essential part showing a membrane structure according to this embodiment, and FIG. 2 is a plan view showing a schematic structure of the membrane structure. Fig. 3, Fig. 3 is a side view of Fig. 2, Fig. 4 is a sectional view taken along the line AA, Fig. 5 is an end view showing the planar constitution of the film material, and Fig. 6 is a tension introduction according to this embodiment. FIG. 7 is a conceptual diagram showing an example of a tensioning device, FIG. 7 is a conceptual diagram showing a main part of the tension introducing device, FIG. 8 is a conceptual diagram showing an embodiment of a tensioning device, and FIGS. It is a conceptual diagram which shows the other Example of this. 10 ... Suspension material, 11 ... Lifting material (strut cable), 12 ... Membrane material, 13 ... Presser cable. 16 ... Pillars, 30
... linear member, 33 ... first pulley, 34 ... support member, 37 ... second pulley, 40 ... motor, 42 ... hoisting pulley.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenzo Shinkubo 3-10-1 Iwamotocho, Chiyoda-ku, Tokyo Mitsui Construction Co., Ltd.

Claims (1)

[Claims] 1. Suspension members arranged substantially in parallel or substantially in a radial pattern, a film member suspended from a plurality of positions of each suspension member by a suspension member, and an intermediate position between each suspension member. In an openable membrane structure including a suspension material and a pressing cable that is arranged on the film material in the same direction and applies a tension force to the film material, one continuous linear member is provided along the suspension material. And a first pulley is arranged on the upper end of each hoisting member, and a pair of second pulleys fixed to the suspension member is arranged directly above each hoisting member. The members are sequentially extended from one of the second pulleys so as to engage with the other second pulleys via the first pulleys, and the ends of the linear member are connected to both ends of the suspension member. Or at one end By connecting to the tensioning device provided, and by winding the filament material by the tensioning device, the respective lifting members are simultaneously pulled upward by a predetermined distance so that a predetermined tension is introduced into the film material. A method for introducing tension in a retractable membrane structure, comprising: