JP2775465B2 - Opening / closing method of membrane material in openable / closable membrane structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rational opening / closing method of a membrane material in a suspension membrane structure capable of opening / closing a membrane material.

(Prior Art and Problems to be Solved by the Invention) At present, the types of membrane structures that are widely used include an air membrane structure, a suspension membrane structure, and a skeleton membrane structure.

In such a structure having the conventional film structure, the lighting conditions are improved by devising the material of the film material, but the openness of the space particularly when used as a sports facility is improved. Had problems.

In recent years, there has been proposed a membrane structure in which the roof surface can be opened and closed as necessary. It is demanded to prevent such a situation from occurring and to take a rational opening and closing method.

The present invention has been developed in view of the above-mentioned conventional problems, and an object of the present invention is to provide a method of opening and closing a membrane material in an openable / closable membrane structure based on a novel composite membrane structure.

(Means for Solving the Problems) In order to achieve the above object, according to the present invention, in the openable / closable membrane structure in which the membrane material can be opened and closed in a folded manner, the tension of the suspension material is reduced when the membrane material is opened. The film material is moved while gradually loosening it, and when closing the film material, the film material is moved while gradually increasing the tension of the suspension material. The tension is always ensured.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 to 6 show an embodiment of the present invention. The suspension film structure according to this embodiment includes a suspension cable 10 as a suspension material as shown in FIG.
And a strut cable 11 as a suspending material, and 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 FIG. 1 and FIG.

From each suspension cable 10, in this embodiment, 7
The strut cables 11 are suspended downward, and the strut cables 11 are used to suspend the membrane material 12 via the suspending fittings 11a.
Is suspended.

At an intermediate position between the suspension cables 10, a holding cable parallel to the suspension cable 10 is provided.
13 is provided on the film material 12.

In FIGS. 1 to 3, reference numeral 14 denotes a girder material as a support member disposed in the row direction at both ends of the suspension cable 10, and 15 denotes a horizontal force disposed at both ends in the row direction of the structure. A truss-type stiffening material 16 is disposed at both ends of each suspension cable 10, and a horizontal member 17 and an auxiliary column member 18 protrude outward from the column member 16. A first reinforcing wire 19 and a second reinforcing wire 20 are disposed on the truss to form a truss as shown in FIG.

Further, beam members 21 as support members provided between the pillars 16 are provided at both ends of the holding cable 13.

Further, as shown in FIG. 3, 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, respectively.

Further, in this embodiment, both ends of each suspension cable 10 and both ends of each holding cable 13 are slidable in the row direction along the supporting members at both ends by a predetermined sliding device (not shown), and Suspension cable
A predetermined tensioning device such as an electric jack is arranged at both ends of the 10 so that a predetermined tension can be introduced into the film material 12 or the tension can be released.

That is, this embodiment is provided with a means for introducing tension to the film material 12 as shown in FIGS.

A single linear member 30 continuous along the suspension member 10
At the upper end of each strut cable 11, a first pulley 33 is disposed rotatably via a rotation shaft 31 and a shaft support rod 32.

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

At the position of each strut cable 11, the linear material 30 is hung down after engaging with one of the second pulleys 37 as shown in FIG. The ends of the linear material 30 are connected to predetermined winding devices (not shown) provided at both ends of the suspension material 10.

The hoisting device includes, for example, a motor (not shown) that can be rotated forward and backward and a hoisting pulley that is coaxially arranged along the rotation axis of the motor, and the end of the linear material 30 is attached to the hoisting surface of the pulley. Connected, the motor can be remotely controlled from the ground position.

Therefore, as shown in FIG. 4, the wire member 30 is wound in the direction of the arrow in the drawing by the winding device, whereby the wire member 30 simultaneously connects the strut cables 11 through the first pulleys 33. When each of them is pulled upward by a predetermined distance, a tension is applied to the suspension member 10 and the holding cable 13, so that a predetermined tension can be introduced to the film member 12 by the strut cable 11.

Further, in the present embodiment, the stiffener 15 provided at one end in the row direction is used as a drive member, and the stiffener 15 is driven in the row direction by a predetermined driving device (not shown). Suspension cable 10 and presser cable 13
At the same time, the film material 12 can be freely opened and closed.

In the suspension membrane structure according to the present embodiment having such a configuration, when the membrane 12 is opened, the suspension cables 10, 10 are moved from the closed state of the membrane 12 shown in FIG. Strut cable 11, holding cable
The sliding member 13 is moved, for example, to the left in the figure by the above-described sliding means, so that the film material 12 is sequentially folded as shown in FIGS. 6 (b) and 6 (c).

Thus, in this embodiment, each suspension cable 1
0, according to the moving speed of the strut cable 11 and the holding cable 13, the tension of the hoisting device arranged at the end of each suspension cable 10 is gradually reduced.

That is, if the tension of the winding device is relaxed at a stroke prior to the movement of the suspension cable 10 or the like, wrinkles and slacks occur in the membrane material 12 as the film material 12 moves closer to the folded state. If the tension is gradually relaxed at a predetermined rate in accordance with the moving speed, the film material 12 always has a minimum tension that does not cause wrinkling or slack during movement.

Then, as shown in FIGS. 6 (a) to 6 (c), a vertical distance L between the hanging point position 11a and the holding cable 13 is determined.
Gradually increases, and the film material 12 moves.

In this manner, the film material 12 can be shifted to the final folded state while keeping the minimum introduction into the film material 12 according to the folded state and preventing the film material 12 from being wrinkled or sagged.

When the membrane 12 is shifted from the open state to the closed state, the suspension cable 10
While gradually increasing the tension of the film material at a predetermined rate,
By moving to the closed position shown in FIG. 9A, wrinkles and slack of the film material 12 can be similarly prevented.

Thus, in the present embodiment, it is possible to reliably prevent wrinkles and sagging from occurring in the film material 12 at the time of opening and closing, and to prevent the film material 12 from becoming an unstable shape at the time of opening and closing. .

In this embodiment, an example in which a drive device is attached to the stiffener 15 is shown. However, when the stiffener 15 is not provided due to design conditions, the drive device is disposed at one end in the row direction instead. Attach the drive unit to one or both of the suspension cable 10 and the holding cable 13 that has been
These can be used as drive members.

Furthermore, the present invention is not limited to the above-described embodiment, and the gist of the present invention is such that the interval and span between each suspension material, the number of strut cables, and the like can be appropriately changed according to design conditions. It goes without saying that various modifications can be made without departing from the scope of the invention.

(Effect of the Invention) The present invention is configured as described above, and moves the film material while gradually relaxing the tension of the suspension material when the film material is opened, and gradually reduces the tension of the suspension material when the film material is closed. By moving the membrane while raising it, the minimum tension that does not cause wrinkles or slack in the membrane during opening and closing is always ensured, so that the membrane becomes unstable when opening and closing It is possible to effectively prevent the occurrence of a long-term proof stress.

[Brief description of the drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is a perspective view of a main part of a film structure according to the present embodiment, and FIG. 2 is a conceptual diagram showing a basic structure of the film structure. , FIG. 3 is a plan view of the membrane structure, FIGS. 4 and 5 are explanatory views of the tension introducing device, respectively, and FIGS. 6 (a) to 6 (c) are states when the membrane material is opened and closed, respectively. FIG. 10 ... suspension material, 11 ... hanging material (strut cable), 12 ... membrane material, 13 ... holding cable, 15 ... stiffening material.

Claims (1)

(57) [Claims] 1. A suspension member arranged substantially in parallel or substantially radially, a film member suspended from a plurality of positions of each suspension member by a suspension member, and an intermediate position between the suspension members. A holding cable disposed on the membrane in the same direction as each suspension material and applying tension to the membrane material, wherein each suspension material and each holding cable are slidable along the support members at both ends of each. age,
By driving a driving member arranged at one end in the girder direction toward the other end in the girder direction by a predetermined driving device, the membrane material is opened and closed in a folded manner together with each suspension material and the holding cable. In the openable / closable membrane structure, when the membrane is opened, the membrane is moved while gradually relaxing the tension of the suspension, and when the membrane is closed, the tension of the suspension is gradually increased while the membrane is closed. A method of opening and closing a film material in an openable / closable membrane structure, wherein the minimum tension is always maintained so that wrinkles and sagging do not occur in the film material at the time of opening and closing.