JP2520636B2 - Hybrid tension membrane structure - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a hybrid tension membrane structure used in a building.

[Prior art]

A suspension membrane structure is a typical example of the hybrid tension membrane structure. This suspension membrane structure is a structure that suspends a wide area of membrane material on a frame such as steel material to cover the space, the roof weight is lighter than conventional buildings, and it can be easily constructed. It has become widely used as a sports facility and an exhibition facility.

One of the important requirements for this suspension membrane structure is to prevent the suspended membrane material from wrinkling. If wrinkles are generated in the film material, stress concentrates on the wrinkles, and the film is likely to be repeatedly subjected to repeated loads, resulting in early damage of the film. Further, this is because the wrinkle convex portion is apt to be worn by friction and the concave portion is apt to attach dirt.

For this reason, when cutting the film material for suspension from the flat film material web prior to the sewing process, it is necessary to predict and carefully perform the film surface shape after the film material is attached to the frame. Therefore,
A highly skilled draping engineer was required, which was a cause of increasing the production cost.

Also, what is important in the suspension membrane structure is that the suspended membrane surface must not have a horizontal surface. If there is a horizontal surface, rainwater will collect and this will cause an eccentric load, which will lead to elongation of the membrane material and shorten the service life.

[Object of the Invention]

An object of the present invention is to solve the conventional problems described above,
It is an object of the present invention to provide a hybrid tension membrane structure which can be attached so as not to cause wrinkles on a membrane material even if it is not subjected to a high degree of steric cutting, and moreover, does not form a horizontal plane.

[Structure of Invention]

The hybrid tension membrane structure of the present invention for achieving the above object has a folded plate structure consisting of a large number of polygonal folded plates inscribed in a virtual cylinder as a basic form, and the ridges of this folded plate structure are frame members. The fold plate skeleton structure obtained by replacing the above is provided as a skeleton. Further, a unit panel is taken for each unit frame corresponding to the polygonal folded plate in the folded plate frame structure, and the unit panel is constructed by affixing a film material to a frame member having an outer shape similar to the unit frame in a tension state. It was done like this.

In this way, the membrane material is attached to the frame member whose outer shape is similar to the unit frame of the folded plate frame structure to form a unit panel, and the unit panel is assembled to the frame structure. No cutting is required, and it is possible to mount it so that it does not cause wrinkles and does not form a horizontal surface because it is simply cut.

In the present invention, the polygonal folded plate refers to a plate-shaped body obtained by bending a planar polygonal plate so that the diagonal line that divides the plate into two equal parts is inclined to both sides thereof. As a polygon forming such a polygonal folded plate, a quadrangle, preferably a square, a hexagon, preferably a regular hexagon or
A rhombus or the like having an angle of 60 degrees is preferably applied.

In the present invention, the folded plate structure means that a large number of polygonal folded plates as described above are arranged such that their bisected diagonal fold lines are arranged in the same direction and the sides of adjacent ones are shared with each other. It means a polyhedron that is formed when it is inscribed and inscribed in a virtual cylinder. That is, it refers to a polyhedron formed by folding lines and sides of the second equidiagonal line as edges.

In this way, when the folded plate structure is inscribed in the virtual cylinder, a polygonal shape having a plurality of bisected diagonal fold lines as its sides is formed inside thereof. That is, when projected onto a plane orthogonal to the center line of the virtual cylinder, it becomes a polygon. The number of corners of this polygon can be variously set by appropriately selecting the size of the polygonal folded plate serving as a unit, but the polygons applied to the present invention include regular triangles, squares, regular pentagons. , Regular hexagon, regular octagon, regular dodecagon, regular dodecagon, regular dodecagon, regular dodecagon, regular dodecagon, regular twenty square, regular thirty-two hexagon, regular thirty-six hexagon, It is preferable that the shape is a regular 40-sided polygon, a regular 48-sided polygon, or a regular 50-sided polygon.

The folded plate frame structure of the present invention is a folded plate structure composed of a polyhedron as described above as a basic body, and refers to a frame structure formed by replacing the edges thereof with a frame member, and further used as a frame structure of a hybrid tension membrane structure. At this time, the plane including the central axis of the virtual cylinder inscribed by the folded plate frame structure or the plane parallel to this plane is configured as the bottom surface.

The hybrid tension membrane structure of the present invention is such that a unit panel is assembled for each unit frame corresponding to a polygonal folded plate in such a folded plate frame structure, and the unit panel has an outer shape approximate to the unit frame. The frame material is attached to the frame material in a tensioned state. Such a unit panel can be easily manufactured by first bending a polygonal frame member having a planar shape along a diagonal line and attaching a film material to the bent frame member. Therefore, the film material only needs to be cut into the above panel, and the same template can be repeatedly used. Further, since the film material is simply attached to the frame material having a simple shape as described above, it is extremely simple without causing wrinkles, and the film surface formed here becomes a hyperboloid to form a horizontal surface. It does not form.

As the film material, a cloth made of a synthetic fiber such as polyester or nylon, an inorganic fiber such as glass, or a natural fiber such as cotton as a base cloth, and coated with a waterproof resin or the like is preferably used. At this time, it is preferable that the waterproof coating film is applied to both front and back surfaces of the base fabric and has three or more layers as a whole. A transparent or semitransparent plastic film may be used as the film material. This plastic film may be a single layer or a laminate of a plurality of sheets. Further, this plastic film may be combined with a reinforcing material such as a cord or cloth.

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

1 to 3 show a framework of a hybrid tension membrane structure according to an embodiment of the present invention, showing a state before the unit panel is assembled.

The skeleton of the hybrid tension membrane structure is composed of a large number of unit skeletons Ub to form a folded plate term structure 1. The unit frame structure 1 is configured. The unit frame Ub is formed of four frame members 3, 3, 3, 3 having four sides, and one frame member 4 is formed diagonally through the frame members Ub. Are combined in a multi-faceted manner.

The unit skeleton Ub has a shape as shown in FIGS. 7A, 7B and 7C, and the diagonal skeleton member 4 serves as an axis, and the skeleton members 3, 3; It is bent at an angle α from the plane state shown by the imaginary line. That is,
When this is regarded as a plate-like body, the polygonal folded plate referred to in the present invention is formed. The plurality of unit frames Ub have diagonal frame members 4 arranged in the same direction in a plan view, and the frame members 3 on the sides are arranged side by side so as to be shared with each other and inscribed in the virtual cylinder C. Plate frame structure 1
Is composed. That is, the frame nodes of the folded plate frame structure 1
5, ..., 5 are inscribed in the virtual cylinder C.

In this way, the folded plate frame structure 1 inscribed in the virtual cylinder C is
When projected onto a plane orthogonal to the central axis O of the virtual cylinder C, it becomes as shown in FIG. 1, and the diagonal frame members 4, ..., 4 form a polygon (regular octagon). In this embodiment, a regular octagon is formed, but if the size of the unit frame Ub is set to be appropriately different, it can be another polygon as described above. The folded plate frame structure 1 in this embodiment is configured such that the surface including the center line O of the virtual cylinder C is the bottom surface FL. Of course, this bottom surface FL is a virtual cylinder C
You may make it comprised by the other surface parallel to the surface containing the central axis O of.

4 to 6 show a hybrid tension membrane structure according to the present invention in which a unit panel Up is assembled to each unit frame Ub of the folded plate frame structure 1 configured as described above. The unit panel Up has a shape that is almost the same as the unit frame Ub as a whole. Moreover, as shown in FIGS. 8A, 8B, and 8C, a polygonal frame member 6 made of a steel pipe or the like is laminated with a film member 7 also cut into a polygonal shape.

In such a unit panel Up, first, the frame member 6 is formed into a plane shape as shown by an imaginary line, bent so as to form an angle α at a diagonal line portion, and is made into a solid line to obtain the frame member. It can be obtained by sticking the film material 7 to the frame material 6 so that the outer edge of the film material 7 is rolled up. The unit panel Up manufactured in this way has no wrinkles on the film surface, and does not form an inclined surface to form a horizontal surface.

As shown in FIG. 9, a movable frame 8 may be attached to the outer surface of the frame member 6 on the unit panel Up so that the position of the movable frame 8 can be adjusted by an adjusting bolt 9 or the like as shown by an arrow. By adjusting the position of the movable frame 8, the tension of the film material 7 can be adjusted. The tension adjustment of the film material 7 by the movable frame 8 can be used not only when the film is first assembled, but also when the tension of the film material that is loose after long-term use is corrected.

In the present invention, the means for assembling the unit panel Up to the unit frame Ub may be arbitrary, but as an example, the means shown in FIG. 10 can be preferably applied.

The assembling means shown in FIG. 10 has a bifurcated mounting frame 11 fixed to the upper surface of the frame member 3 of the unit frame Ub, and the left and right mounting portions 11a,
The frame members 6 and 6 of the unit panels Up and Up are fixed to 11b so as to be adjacent to each other. A rain gutter 12 is attached to the bifurcated mounting frame 11 in the middle portion, and a cap-shaped lid plate 13 is provided on the upper surface of the bifurcated mounting frame 11. Can be installed. Further, a ventilation hole may be provided in the mounting frame 11 instead of the rain gutter.

The hybrid tension membrane structure described above can be effectively used as various structures such as sports facilities such as tennis, volleyball, and basketball, a gathering facility for a large number of people, an exhibition facility such as an exhibition.

〔The invention's effect〕

As described above, in the hybrid tension membrane structure of the present invention, the unit panel to which the membrane material is attached is assembled to the folded plate frame structure, and it is possible to form a horizontal plane without generating wrinkles. It can be installed so that it does not exist. Since the film material of the unit panel may be of one type, it can be easily prepared even by a cutting technician having a special skill.

In addition, since the unit panel can be manufactured by repetitive work, it is easy to improve the quality accuracy, and a highly reliable structure can be obtained. Further, even if a breakage should occur, it is possible to repair it by exchanging only part of it, so that the maintenance can be extremely simplified.

Further, in the hybrid tension membrane structure of the present invention, although the membrane material forms a substantially cylindrical ceiling, the membrane surface shape does not concentrate the reflected sound of the room sound on the center axis of the cylinder. Therefore, it is possible to reduce the phenomenon that the sound is amplified and reverberated to form an echo.

On the other hand, the skeleton of the folded plate frame structure is a three-dimensional frame composed of a linear frame member (called a sigle layer in the architectural world).
Since it is mainly used, the structure of the nodes and the assembling thereof can be simplified as compared with the space truss frame having two or more layers. In addition, this folded plate frame structure is based on a polygonal folded plate, and the longest frame member is located at a position lower than the adjacent frame members. It will be supported naturally, and it will be very easy to build. Further, since the folded plate frame structure has the same pattern repeated, there are few kinds of assembling members, which facilitates the assembling accuracy.

Further, since the skeleton exists inside the unit panel, a ventilation device, a lighting device, etc. can be easily attached to the skeleton, and a special pedestal can be unnecessary for the attachment.

[Brief description of drawings]

1 to 3 show a framework of a hybrid tension membrane structure according to an embodiment of the present invention, and FIGS. 4 to 6 show a hybrid tension membrane structure after a unit panel is assembled to the framework. The above-mentioned FIG. 1 is a front view of the same frame, and FIG.
The figure is a side view taken along the line II in Fig. 1, and Fig. 3 is the line II in Fig. 1.
FIG. 4 is a plan view of the hybrid tension membrane structure of FIG. 4, FIG. 5 is a side view of FIG. 4 along arrow V, and FIG. 6 is a plan view of FIG. 4 along arrow VI. Is. Seventh
FIGS. A, B, and C are unit frames of polygonal folded plates that form the above frame. FIG. 7A is a plan view, FIG. 7B is a front view, and FIG. 7C.
Is a side view. 8A, B, and C are unit panels, FIG. 8A is a plan view, FIG. 8B is a front view, and FIG. 8C is a side view. FIG. 9 is a view showing a partial cross section of a main part of a unit panel according to another embodiment, and FIG. 10 is a cross sectional view of a main part of a unit panel attached to a skeleton. 1 ... Folded plate frame structure, 3 ... (side) frame member, 4 ...
Frame members (diagonal), 5 ... Nodal points, 6 ... Frame members, 7 ...
… Membrane material, 11 …… Mounting frame, 12 …… Rain gutter.

Claims (7)

(57) [Claims] 1. A multiplicity of polygonal folded plates whose bisectors are fold lines are formed by arranging the fold lines in the same direction and arranging them so that their sides are shared by each other and inscribed in a virtual cylinder. A polygonal folded plate structure is used as a basic form, and a folded plate frame structure is formed by replacing the ridge of this folded plate structure with a frame member,
A unit panel is assembled for each unit frame corresponding to the polygonal folded plate in this folded plate frame structure, and the film member is attached in a tension state to a frame member having an outer shape similar to the unit frame. A hybrid tension membrane structure characterized in that 2. The hybrid tension membrane structure according to claim 1, wherein the polygonal folded plate is a quadrangle, a hexagon, or a rhombus having an angle of 60 degrees. 3. The hybrid tension membrane structure according to claim 1, wherein the polygonal folded plate is a square or a regular hexagon. 4. The hybrid tension membrane structure according to claim 1, wherein a rain gutter is arranged between the unit panels adjacent to each other. 5. The hybrid tension membrane structure according to claim 1, wherein an electric wire cable or a water supply pipe is arranged between the unit panels adjacent to each other. 6. A polygonal structure formed by ridges when a folded plate structure inscribed in a virtual cylinder is projected onto a plane orthogonal to the central axis of the virtual cylinder, the polygon being a regular triangle, a square, a regular pentagon, a regular hexagon, Regular octagon, regular dodecagon, regular dodecagon, regular dodecagon, regular dodecagon, regular dodecagon, regular dodecagon, regular dodecagon,
The hybrid tension membrane structure according to claim 1, wherein the hybrid tension membrane structure is in the shape of a regular hexagon, a regular 40, a regular 48, or a regular 50. 7. The hybrid tension membrane structure according to claim 1, wherein the bottom surface is a surface including the central axis of the virtual cylinder or a surface cut parallel to the center axis.