JPH0426029B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a double membrane retractable roof.

(Prior art) Conventionally, when opening and closing a roof, the entire roof was configured to be movable, or the roof was divided into multiple parts in the length direction and each roof member was configured to be movable, and each roof member was moved to one side. There is a structure in which the roofs are opened by being moved and placed one above the other.

However, the former requires extra space for the large roof that was moved, and the latter requires a large roof opening area by increasing the number of divisions and shortening the length of each roof member. Disadvantages include the fact that the height of the building becomes too high and the ceiling becomes low, reducing the effective area of the building.Also, since both move heavy roofs, the moving equipment becomes large and expensive. It was hot.

Therefore, for example, the upper opening of a building that is approximately circular in plan view, such as a baseball stadium or a trade fair hall, is covered with a membrane member, and low-pressure pressurized air is supplied inside to inflate the membrane member upward to form a roof. Those with lighter roofs, and those with membranes covering the top openings of rectangular buildings in plan view, such as arcades in shopping streets, and folding these membranes several times to create larger roof openings. be.

(Problems to be Solved by the Invention) If the roof made of a membrane member is inflated with pressurized air and supported by air pressure as described above, the roof cannot be opened or closed, so the roof cannot be opened or closed during good weather. There was a problem in that the roof could not be opened or folded down to prevent damage during strong winds or snowfall.

In addition, in the case of a retractable roof made of a single membrane member applied to shopping arcades, etc., it is not possible to apply a predetermined tension to the membrane member when the roof is closed, so the membrane member may wave. It tends to have an uneven shape, and when rainwater accumulates there, it becomes even more likely to ripple, and because it is difficult for sand and dust to be washed away by rainwater, it becomes easily dirty, resulting in a poor appearance.

Moreover, when this type of single-layer retractable roof is applied to a roof with a large span, the membrane member itself has almost no shape-retaining ability, so unless it is restrained with multiple shape-retaining materials, the membrane member will wave up and down greatly due to wind pressure. There is a problem that it will be damaged by the impact force and that the noise caused by flapping during undulation will be significant.

(Means for Solving the Problems) The double membrane type retractable roof according to the first invention of the present application is a retractable roof that can be freely opened and closed and covers a rectangular area in a plan view, and is arranged in parallel to each other at an appropriate span distance from the left and right. A pair of guide members extending in the front and rear directions are provided, and a membrane roof is provided in which a plurality of movable double membrane panels made of double flexible airtight membranes are connected in series in the front and rear direction over the entire span length. A plurality of shape-retaining support members are provided, which are joint edges in which heavy membrane panels are connected in series in the front-rear direction, and are fixed to the left-right joint edges, and both ends are guided and supported by left and right guide members. By moving multiple shape-retaining support members other than the shape-retaining support member fixed at the folded position along with the membrane roof back and forth along the guide member, the closed state covered with the membrane roof and the membrane roof folded position can be achieved. The movable double membrane panel is provided with an opening/closing means for opening and closing between the folded and open state, and a pressurized air supply means for supplying pressurized air into each movable double membrane panel.

The double membrane type retractable roof according to the second invention of the present application is a retractable roof that can be freely opened and closed to cover all or a part of a circular area in a plan view, and a guide member and a guide member covering the whole or part of the circumference. A central support member is provided above the center of curvature, and a plurality of sets of movable double membrane panels consisting of double flexible airtight membranes having a fan shape in plan view extending from the central support member to the guide member are arranged in a circumferential direction. The movable double membrane panels are provided with a membrane roof which is secured to the circumferentially oriented joint edges of the movable double membrane panels and which are attached to the radially oriented joint edges, with one end attached to the central support member and the other end attached to the guide member. A plurality of supported shape-retaining support members are provided, and the plurality of shape-retaining support members other than the shape-retaining support member fixed at the folded roof position are circumferentially moved together with the membrane roof along the guide member and the central support member. Pressure is provided to supply pressurized air into each movable double membrane panel by providing an opening/closing means that opens and closes the closed state where the membrane roof is covered and the open state where the membrane roof is folded to the roof folding position by moving the panel. It is equipped with an air supply means.

(Function) In the double membrane type retractable roof according to the first invention of the present application, the shape-retaining support member is a joint edge where the movable double membrane panels are connected in series in the front-rear direction, and is a joint edge facing in the left-right direction. Since both ends are guided and supported by the left and right guide members, the shape-retaining support member other than the shape-retaining support member in the roof folding position can be opened and closed along the guide member in the opposite direction from the roof folding position. When the membrane roof is moved in the direction, the membrane roof is expanded through the shape-retaining support member and the movable double membrane panel, and the roof is in a closed state, and from this closed state, the shape-retaining support member is guided by the opening/closing means. When moving along the member toward the roof folding position, each movable double membrane panel is folded into a folded shape through the shape-retaining support member, and the membrane roof is folded compactly to the roof folding position, opening the roof. The state will be as follows.

Then, when the membrane roof is expanded to close the roof and pressurized air is supplied into each movable double membrane panel by the pressurized air supply means, each movable double membrane panel expands with air pressure and the shape retaining support member It becomes a predetermined shape constrained by .

When the movable double membrane panel is inflated by air pressure, a predetermined tension is applied to the flexible airtight membrane, increasing the shape retention capacity of the membrane itself, and increasing the rigidity of the entire movable double membrane panel, increasing its shape retention capacity. becomes very large.

Since the membrane roof is restrained and supported by shape-retaining support members at appropriate intervals in the front and rear directions, the membrane roof remains stable as a whole even against large wind pressure, and the flexible airtight membrane of the movable double membrane panel It also becomes stable against wind pressure due to the action of tension.

In the double membrane type retractable roof according to the second invention of the present application, the shape-retaining support member is a joint edge where the movable double membrane panels are connected in the circumferential direction, and is fixed to the joint edge in the radial direction. Since both ends of the roof are guided and supported by the guide member and the central support member, by moving the shape-retaining support member in the roof folding position in the circumferential direction along the guide member using the opening/closing means,
In substantially the same way as the retractable roof of the first invention, the membrane roof can be opened and closed into a closed state by expanding it, and an open state by folding the membrane roof into the roof folding position.

The operation in the state in which pressurized air is supplied into each movable double membrane panel of the membrane roof to inflate it is substantially the same as that of the first invention.

(Effect of the invention) According to the double membrane retractable roof according to the first invention of the present application, as explained above, the movable double membrane panel expands due to the force of the shape retaining support part of the shape retaining support member and pressurized air. Because the structure makes effective use of the shape-retaining force of the membrane roof, the structure of the shape-retaining support member can be simplified and the cost can be reduced. It is possible to construct a roof with excellent drainage performance (exterior appearance when viewed from the inside), and the roof is stable against wind and wind pressure.
Depending on the structure of the movable double membrane panel, the shape-retaining support member, and the guide member, effects such as the ability to construct a large-span retractable roof can be obtained.

According to the double retractable roof according to the second invention of the present application,
In addition to the effects that are substantially the same as those of the first invention, the following effects can also be obtained. A membrane roof is provided in which multiple sets of movable double membrane panels that are fan-shaped in plan view are connected in the circumferential direction, and shape retaining support members oriented in the radial direction are fixed to the joint edges of the movable double membrane panels to provide shape retaining support. By guiding and supporting both the inner and outer ends of the member by the central support member and the guide member, respectively, it is possible to open and close all or part of the circular area in plan view, which was previously thought to be impossible. A completely revolutionary retractable roof can be put into practical use.

Furthermore, since the shape-retaining support member may have a simple structure as described above, the manufacturing cost of the retractable roof is also relatively low.

(Example) First, regarding the example of the first invention of the present application, FIG.
This will be explained based on FIG.

The double membrane retractable roof according to this example is shown in Figure 1.
As shown in Figure 2, the upper part of a rectangular building S or structure that is long in the front-rear direction when viewed from above, such as physical education facilities (gymnasiums, pools, tennis courts, etc.), shopping arcades, trade fair venues, and various event venues. It is a retractable roof that covers the opening and can be opened and closed.

As shown in FIG. 1, the membrane roof R is formed by connecting five movable double membrane panels 1 in series in the front-rear direction, each consisting of a double flexible airtight membrane spanning the entire length of the left-right span. In order to maintain the shape of this membrane roof R and to open and close it, the joining edges 2 along the left and right directions, which are the front and rear edges of each movable double membrane panel 1, are fixed to shape retaining support members 3. Both left and right ends are guided and supported by guide members 5 at the upper ends of the left and right side walls 4a of the building S.

After covering the upper opening with the membrane roof R by moving the shape-retaining support member 3 along the pair of guide members 5 which are opposed to each other on the left and right and extend back and forth, five sets of movable double membrane panels 1 are deployed. These movable double membrane panels 1 are used with pressurized air filled inside them.

In addition, when the weather is good, if necessary, as shown in FIG. The upper opening can be opened by moving the roof to the folding position and folding the five sets of movable double membrane panels 1.

The membrane roof R consisting of the five sets of movable double membrane panels 1 is composed of two flexible airtight membranes 1a stacked one above the other, and has a length extending over the entire length of the upper opening of the building. It may be formed by joining the entire length of the span at 5 equal parts in the front and rear direction and at the front and rear end positions, and by joining the left and right side edges, or by manufacturing 5 sets for each movable double membrane panel 1. It may be formed by overlapping and joining the joining edges 2 of the movable double membrane panel 1.

Flexible airtight membrane 1a for the movable double membrane panel 1
Examples include synthetic resin membrane materials with excellent weather resistance, membrane materials made of woven fabric made of synthetic resin fibers with excellent weather resistance and waterproof and airtight processing, or synthetic resins with excellent weather resistance reinforced with reinforcing fibers such as glass fibers. A membrane material or the like is used.

In addition, the flexible airtight membrane of the movable double membrane panel 1 used for a membrane roof R with a large span of 20 m or more is a membrane member reinforced with synthetic resin fiber rope wires at appropriate intervals in the front, rear, left and right directions. may also be used. In the case of movable double membrane panels used for a large span membrane roof R, each movable double membrane panel 1
may be divided into a plurality of sections by joints extending back and forth at appropriate intervals in the span direction.

As shown in FIGS. 1, 2, and 5, the guide member 5 has a C-shaped cross section with two upper and lower strips provided along the upper end of each left and right side wall 4a over the entire length of the side wall 4a. The shapes 5a and 5b are fixed to the pillars 5c of the building S.

The guide member 5 is for supporting both ends of the shape-retaining support member 3 and guiding it movably in the front-rear direction, and the openings of the respective shapes 5a and 5b are directed toward the inside of the building S. ing.

The shape-retaining support member 3 is shown in FIGS. 1 and 3 to 5.
As shown in the figure, the joint edge 2 at the front edge of the movable double membrane panel 1 on the frontmost side, the joint edge 2 between the movable double membrane panels 1, and the movable double membrane panel 1 on the rearmost side.
A total of six sets of shape-retaining support members 3 are provided at the joint edge 2 at the rear edge of the building S.
is fixed to the front wall 4b, while the other five shape-retaining support members 3 are movable in the front-rear direction along the left and right guide members 5.

Each of the above-mentioned shape-retaining support members 3 includes upper left and right shaped members 5
The upper wire 3a extending to the left and right lower sections 5
b, and suspension wires 3c connecting the upper wire 3a and the lower wire 3b at appropriate intervals in the span direction.
b is embedded in the joint edge 2 of the movable double membrane panel 1 and integrally joined, and the guide ring 7a at the upper end of the spacer rod 6 extending between the ends of the upper wire 3a and the lower wire 3b is connected to the upper profile member. A guide ring 7b at the lower end of the spacer rod 6 is installed freely in the lower section 5b, and a support ring 7c above the guide ring 7b runs along the upper surface of the section 5b. It's starting to roll around.

By applying a certain amount of tension to the upper wire 3a and the lower wire 3b and connecting the upper wire 3a and the lower wire 3b with the suspension wire 3c, the upper wire 3a is shaped like a gentle curve that swells downward, and the lower wire is 3b is formed in a gently curved shape that bulges upward, and by regulating the shape of the joining edge 2 of the movable double membrane panel 1 to the same shape as the lower wire 3b, when filled with pressurized air. The shape of the movable double membrane panel 1 is connected to the lower wire 3b.
Similarly, it can be restrained in a curved shape that bulges upward.

This facilitates drainage of rainwater that falls on the movable double membrane panel 1 and allows it to be maintained in a shape that is favorable in terms of appearance.

However, it is also possible to have a structure in which the lower wire 3b is disposed below the joint edge 2, and the joint edge 2 is connected to the middle part of the suspension wire 3c.

In addition, the reference numeral 8 is a bent link for regulating the width of each movable double membrane panel 1 in the front and rear direction when the movable double membrane panel 1 is unfolded and filled with pressurized air. , 10 are also used to regulate the width in the front-rear direction similarly to the bent link 8, and are connected to each upper wire 3a.
Note that a wire may be used instead of the bent link 8.

Each of the above-mentioned shape-retaining support members 3 is formed as a structure made of an upper wire 3a, a lower wire 3b, and a plurality of suspension wires 3c, but it may also be made of a synthetic resin rope or a metal structure. It may be constructed of a structural surface made of pipe material or molded material, or may be constructed of a thick membrane material similar to the flexible airtight membrane 1a.

Although the guide member 5 is constructed of the C-shaped cross-section shaped members 5a and 5b, it may also be constructed of a strongly stretched wire, a metal pipe, a rod, a square member, or the like. In short, the guide member 5 only needs to have a structure that can support the lateral and downward loads acting from the shape-retaining support member surrounding and guide the end portion of the shape-retaining support member 3.

The left and right side edges of each movable double membrane panel 1 are also joined as shown in FIG. 5, and an air chamber is formed therein.

The membrane roof R can be expanded to supply pressurized air into the movable double membrane panel 1, or the movable double membrane panel 1 can be expanded.
In order to discharge the pressurized air inside, it is constructed as follows.

That is, as shown in FIG. 5, the air chambers in adjacent movable double membrane panels 1 are connected to each other through one or more flexible communication pipes 11, and the movable double membrane panels on the frontmost side The air chamber within the membrane panel 1 is connected to the discharge port of a blower 13 through a supply/exhaust pipe 12 having an on-off valve (not shown).

When the above-mentioned on-off valve is opened and extremely low pressure pressurized air (for example, 5 to 50 mmHg) is supplied from the blower 13,
Pressurized air is supplied to the air chambers of all the movable double membrane panels 1 through the supply/exhaust pipe 12, the air chamber, and the communication pipe 11, and the pressurized air can be held by closing the on-off valve.

When removing the pressurized air, the blower 13
When the on-off valve is opened with the movable double membrane panel 1 stopped, the pressurized air inside the movable double membrane panel 1 is discharged to the outside via the supply/exhaust pipe 12.

In addition, since moisture in the air may condense inside each movable double membrane panel 1, it is desirable to provide a drain hole at the lowest position when each movable double membrane panel 1 is folded. .

Incidentally, the communication pipe 11 may be omitted and a communication path may be provided in the joint edge 2, or the air chamber within each movable double membrane panel 1 may be connected to the blower 13 by a bellows hose or the like.

In addition, when removing the pressurized air inside the movable double membrane panel 1, the blower 13
The air inside may be sucked out.

Opening/closing means for unfolding and folding the membrane roof R via the shape-retaining support member 3 are provided symmetrically to the left and right side walls 4a of the building S and the guide member 5 as follows.

That is, a plurality of sheaves 14 provided at the front end and rear end of the side wall 4a of the building S and the drum 15a of the motor 15.
At the same time, one loop-shaped wire 16 is wound in a double loop shape, and is run inside the upper section 5a and the lower section 5b, and this wire 16 is connected to the upper wire 3a of the shape-retaining support member 3 at the rearmost part. It is fixed to the guide wheel pivot 17a and the guide wheel pivot 17b of the lower wire 3b.

When the motor 15 is rotated clockwise in FIG. 5, the wires 16 in both the sections 5a and 5b run rearward, so that the left and right ends of the shape-retaining support member 3 at the rear end are pulled rearward by the wires 16. With this shape-retaining support member 3, the membrane roof R is ignited rearward from the folded state, and the upper opening of the building S is covered with the membrane roof R.

On the other hand, when the motor 15 is rotated counterclockwise, the wires 16 in both the shapes 5a and 5b run forward, so the shape-retaining support member 3 at the rear end is pulled forward, and this shape-retaining support member 3 As a result, the membrane roof R and other shape-retaining support members 3 are pushed forward and brought into a folded position at the front end of the building as shown in FIG.

However, if the total length of the membrane roof R is long, the membrane roof R may be divided into two parts in the front and back and folded into the front end and the rear end of the building S, or the membrane roof R may be folded toward the center of the building S in the longitudinal direction. It may also be folded from the front and rear.

However, the motor 15 may be omitted and the membrane roof R may be opened and closed manually via a wire or the like.

In the above configuration, when closing the double membrane retractable roof, the shape-retaining support member 3 at the rearmost portion is moved rearward by the opening/closing means as described above.
All the movable double membrane panels 1 are unfolded via the movable double membrane panels 1, the folded links 8, and the wires 9, 10, and the upper opening of the building S is closed with the membrane roof R.

Next, when pressurized air is supplied and held inside the movable double membrane panel 1 by the pressurized air supply means, each movable double membrane panel 1 is sufficiently expanded, and the tension causes the movable double membrane panel 1 to expand. The rigidity is increased and the shape retention property is improved, and the shape retention action of the shape retention support member 3 allows it to be held in a predetermined curved shape. In this state, the space between the shape-retaining support members 3 is
0 and the bent link 8.

Next, when folding the retractable roof, the pressurized air in the movable double membrane panel 1 is released to the outside as described above, or after that, the rearmost shape-retaining support member 3 is opened and closed by the opening/closing means. As it is moved forward, the other shape-retaining support members 3 are pushed forward, and each movable double membrane panel 1 is folded into a folded shape.
The retractable roof is in a folded state at the front end of the building S.

Next, regarding the embodiment of the second invention of the present application, FIGS.
This will be explained based on FIG.

As shown in FIG. 6, the double membrane type retractable roof according to this embodiment is a retractable roof that can open and close all or part of a circular area in plan view, such as a baseball field or other competition facility or a trade fair venue. It is.

FIG. 6 shows a state in which a double-membrane retractable roof installed, for example, in a building for a trade fair is being folded.

A guide member 22 (see FIG. 8) is disposed at the upper end of the circumferential wall 20, which is circular in plan view, over the entire circumference, and a central support 23 is erected high upward at the center of curvature of the circumferential wall 20. An upper guide member 24 is provided at the upper portion of the central column 23, and a lower guide member 25 is provided at a portion somewhat higher than the middle stage of the central column 23.

The membrane roof R is a double flexible airtight membrane 21a extending from the lower guide member 25 to the guide member 22 and having a fan shape in plan view.
For example, 24 sets of movable double membrane panels 21 are connected in the circumferential direction.

Flexible airtight membrane 21a of the movable double membrane panel 21
is made of the same membrane material as the flexible airtight membrane 1a of the movable double membrane panel 1 in the above embodiment.

A shape-retaining support member 27 made of wire is fixed to each of the joining edges 26 along the radial direction of the movable double membrane panel 21 and connecting the movable double membrane panels to each other, Each shape-retaining support member 27
Its lower end is supported and guided by a guide member 22, and its upper end is supported by an upper guide member 24 and a lower guide member 25.
You will be supported and guided.

Note that a shape-retaining support member 27 is also provided at the joining edge 26 on the free end side of each movable double membrane panel 21 at the circumferential end of the membrane roof R.

As shown in FIGS. 7 and 8, the shape-retaining support members 27 are connected from the upper guide member 24 to the guide member 2
2, and a lower wire 27b extending from the lower guide member 25 to the guide member 22.
and suspension wires 27c that connect the upper wire 27a and the lower wire 27b at appropriate intervals in the radial direction.
It is equipped with

A guide ring 28a connected to the upper end of the upper wire 27a is rotatably mounted in a guide groove of the upper guide member 24, while a guide ring 28b connected to the upper end of the lower wire 27b is attached to the lower guide member 24.
The upper wire 2
A guide ring 28c connected to the lower ends of the wire 7a and the lower wire 27b is rotatably mounted in the guide groove of the guide member 22.

To explain the opening/closing means for opening and closing the membrane roof R, as shown in FIG.
2, three ring-shaped wires 29a, 29b, 29c are arranged around the entire circumference, and these three wires 29a, 29b, 29c are moved in the roof closing direction ( It can be selectively moved both in the direction of arrow A in FIG. 6) and in the roof opening direction (in the direction of arrow B in FIG. 6).

Among the 25 shape-retaining support members 27, the first shape-retention support member 27 is fixed at the roof closed position, and the 25th shape-retention support member 27 is counted from the first shape-retention support member 27A in the direction of arrow A. If it is the leading shape-retaining support member 27, the first wire 29a of the wires
is fixed to the guide ring pivot 30 at the lower end of the eighth shape-retaining support member 27, the second wire 29b is fixed to the guide ring pivot 30 of the sixteenth shape-retaining support member 27, and the third wire 29c is fixed to the guide ring pivot 30 at the lower end of the eighth shape-retaining support member 27. 25 is fixed to the guide wheel pivot support 30 of the shape-retaining support member 27.

When the membrane roof R is unfolded and closed, the first to third wires 29a to 29c are moved at the same speed by the arrow A until the eighth shape-retaining support member 27 reaches a predetermined position.
direction, and then the second and third wires 29 until the sixteenth shape-retaining support member 27 reaches the predetermined position.
b and 29c at the same speed in the direction of arrow A, and then move the third wire 29 until the 25th shape-retaining support member 27 reaches a predetermined position (a position close to the first shape-retaining support member 27A).
It is sufficient to move c in the direction of arrow A.

When opening and folding the membrane roof R, the above-mentioned operation may be reversed.

Here, in order to prevent the upper end portion of the shape-retaining support member 27 from twisting around the central column 23 when the membrane roof R is opened and closed, the upper guide member 2 is attached as shown in FIG.
A ring gear 31 is attached to the central support 23 on the lower side of 4.
The ring gear 31 is rotatably mounted, and the ring gear 31 can be selectively rotated in forward and reverse directions by a pinion 32 driven by a motor 33.
The distal end of the arm 34 fixed to is connected to the upper end of the upper wire 27a of the twenty-fifth shape-retaining support member 27.

Also, on the lower side of the lower guide member 25, a ring gear 35, a pinion 36, and a motor 37 similar to those described above are provided.
and an arm 38, and the tip of this arm 38 is connected to the lower wire 27b of the 25th shape-retaining support member 27.
is connected to the upper end of the

As mentioned above, when opening and closing the membrane roof R, the ring gears 31, 35 and arms 34, 38 are rotated in the direction of arrow B or arrow A in synchronization with the movement of the 25th shape-retaining support member 27. It's summery.

In order to supply and discharge pressurized air into and out of the air chambers of all the movable double membrane panels 21 of the membrane roof R, a pressurized air supply pipe 39 connected to a blower is provided at the upper end of the peripheral wall 20. The air supply/exhaust pipe 40 branched from the pressurized air supply pipe 39 expands the membrane roof R and then connects the first, fourth, seventh,... 19th, and 22nd movable double membrane panels 21. connected to the pipe.

Then, pressurized air is supplied from the air chamber in the first movable double membrane panel 21 to the air chambers in the second and third movable double membrane panels 21 via the communication pipe 41,
Pressurized air is supplied to the other air chambers in the same manner as described above.

When discharging the above pressurized air from the air chamber,
The supply/exhaust pipe 40 may be separated from the connecting pipe on the movable double membrane panel 21 side.

It is also possible to provide a pressurized air supply system near the lower guide member 25 and supply pressurized air into the movable double membrane panel 21 from the upper end side of the membrane roof R. Since the upper end side of the membrane roof R has a small amount of movement during opening and closing, a somewhat longer supply/exhaust pipe made of a flexible pipe can be connected to the pressurized air supply system.

Next, a modification of the above embodiment will be briefly explained with reference to FIG. 9.

The double-membrane retractable roof according to this modified example covers about half of the circular stadium in plan view in a manner that can be opened and closed freely, and the remaining half of the stadium is covered by a dome-shaped fixed roof 42. covered with.

In the case of the above stadium, the central pillar 23 is located at the center.
Since the stadium cannot be erected, the central pillar 23A provided above the center of the stadium is supported by three arches 43.

In the figure, reference numeral R denotes a membrane roof, 21 a movable double membrane panel, 22 a guide member, and 27 a shape-retaining support member having a truss structure made of metal pipe material.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the first invention of the present application, in which Figure 1 is a perspective view of the building with the roof closed, Figure 2 is a perspective view of the building with the roof folded, and Figure 3 is a perspective view of the building with the roof folded. FIG. 1 is a sectional view taken along the line in FIG. 1, FIG. 4 is a sectional view taken along the line shown in FIG. 6 to 9 show an embodiment of the second invention of the present application, in which FIG. 6 is a perspective view of a building for an exhibition hall in the middle of folding the roof, and FIG. 7 is an illustration of the upper end support structure of the shape-retaining support member. FIG. 8 is a partially cutaway longitudinal cross-sectional view of the main part of the lower end support structure of the shape-retaining support member, and FIG. 9 is a perspective view of the stadium with the roof closed, relating to the deformed side. . R...Membrane roof, 1...Movable double membrane panel, 1a
. . . Flexible airtight membrane, 2 . . . Joint edge, 3 . …
...Blower, 14...Sheave, 15...Motor, 1
6... Wire, 17a, 17b... Guide wheel pivot, 21... Movable double membrane panel, 21a... Flexible airtight membrane, 23... Central column, 24... Upper guide member, 25... Lower part Guide member, 26... joint edge, 27... shape-retaining support member, 28a, 28b...
Guide wheel, 29a, 29b, 29c... wire,
31, 35... Ring gear, 32, 36... Pinion, 33, 37... Motor, 34, 38... Arm, 39... Pressurized air supply pipe, 40... Supply/exhaust pipe, 41... Communication pipe.

Claims (1)

[Scope of Claims] 1. A retractable roof that can be opened and closed to cover a rectangular area in a plan view, comprising: a pair of guide members extending front and back and parallel to each other with an appropriate span between them on the left and right; and two guide members extending over the entire length of the span. A membrane roof consisting of multiple sets of movable double membrane panels made of heavy flexible airtight membranes arranged in series in the front and back direction, and a joint edge made up of movable double membrane panels arranged in series in the front and rear direction on both sides. A plurality of shape-retaining support members that are fixed to the directional joint edge and whose both ends are guided and supported by the left and right guide members, and a plurality of shape-retention support members other than the shape-retention support member fixed at the roof folding position. an opening/closing means for opening and closing the membrane roof into a closed state covered by the membrane roof and an open state in which the membrane roof is folded to the roof folding position by moving the membrane roof back and forth along the guide member; A double membrane retractable roof characterized by comprising a pressurized air supply means for supplying pressurized air. 2 Each of the shape-retaining support members connects the wire provided between the guide members and the lower wire provided between the guide members and fixed to the joint edge of the movable double membrane panel with a suspension wire. A double membrane type retractable roof as set forth in claim 1, characterized in that the double membrane type retractable roof is connected with. 3. In a retractable roof that covers all or part of a circular area in plan view, a guide member covering all or part of the circumference and a central support member provided at least above the center of curvature of the guide member. , a membrane roof made up of a plurality of movable double membrane panels arranged circumferentially, each consisting of a double flexible airtight membrane having a fan shape in plan view extending from the central support member to the guide member; a plurality of shape-retaining support members, which are radially connected joint edges and are fixed to the radial joint edges, one end of which is guided and supported by a central support member and the other end of which is guided and supported by a guide member; and a folding roof. A closed state covered with a membrane roof by moving a plurality of shape-retaining support members other than the shape-retaining support member fixed in position in the circumferential direction along the guide member and the central support member together with the membrane roof; A double membrane characterized by comprising an opening/closing means for opening and closing the membrane roof to an open state in which the membrane roof is folded to a folded roof position, and a pressurized air supply means for supplying pressurized air into each movable double membrane panel. Retractable roof.