JP3882313B2 - Multi-stage dome structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multistage dome structure, for example.
[0002]
[Prior art]
In general, the dome structure is generally a dome-shaped roof frame with a light roof membrane, and has a structure that rises from the periphery of the building with a certain rise (startup = muclide).
[0003]
An example of a dome structure provided with a ventilation opening is a ventilation dome roof disclosed in Japanese Patent Publication No. 49-43409. This dome roof is a dome-shaped roof skeleton with a large number of ring-shaped roof boards arranged to wrap up and down with gaps. This roof board prevents rain and at the same time opens the gaps between the roof boards. It is a thing. This eliminates the need for air conditioning for ventilation.
[0004]
[Problems to be solved by the invention]
However, in the conventional dome structure, the roof surface rises as a continuous surface from the periphery of the building, and it is difficult to provide an opening for ventilation in the middle part, and air conditioning equipment for ventilation is provided. It was necessary.
[0005]
On the other hand, in the above-mentioned dome roof provided with ventilation openings, a large number of roof boards are arranged in a shelf shape, and dust tends to accumulate in this part, so it is necessary to clean regularly, it is an altitude work, In addition, since there are many roof boards, there is a disadvantage that a large amount of cost is required for cleaning management and the maintenance cost is expensive.
[0006]
Further, in the case of an ordinary cable dome, if the rise is increased, the bundle material becomes too long, so that there is a drawback that the ceiling height cannot be sufficiently obtained for the size of the building volume.
[0007]
The present invention solves the above-mentioned drawbacks, and the object of the present invention is to use a cylindrical truss member as an opening portion for ventilation, thereby eliminating the need for air conditioning equipment for ventilation and providing dust in the opening portion. Therefore, it is an object of the present invention to provide a multistage dome structure that can greatly reduce the maintenance cost.
[0008]
It is another object of the present invention to provide a multi-stage dome structure that can take a sufficient ceiling height to become a central portion by being multi-stage by combining with a tubular truss member. .
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises an upper chord material and a lower chord material, and the upper chord material includes a plurality of radial lattice materials and a plurality of concentric circumferential lattice materials intersecting with each radial lattice material. And in the dome roof constituted by the bundle material arranged vertically at the intersection of the circumferential lattice material and the radial lattice material, the dome roof is divided into a plurality of concentric shapes from the center of the top, Connected with a cylindrical part between the eaves side edge and the ridge side edge of the divided roof part to form a multi-stage dome roof shape, and a substantially trapezoid partitioned by each radial lattice material and circumferential lattice material Stiffening parts are arranged on each of the surfaces, and the stiffening parts have poles standing at the center of the trapezoidal lattice frame, and the upper and lower ends of this pole and the four rounds of the lattice frame. Apply pretension between the corners. Characterized in that it is a unit having two pairs of cables stretched Te.
[0010]
Therefore, in the present invention, by allowing the vertical surface of the tubular portion to be opened or opened as a ventilation opening, the ventilation portion can be a vertical surface, and ventilation inside and outside the structure can be secured without collecting dust. In the present invention, a sufficient ceiling height can be obtained according to the rising height of the cylindrical portion.
[0011]
Further, in the present invention, the inclined cable that connects the lower end of the bundle and the upper end of another bundle adjacent to the bundle in the radial direction, and the lower end of each bundle and the bundle are adjacent to each other in the circumferential direction. A circumferential cable connecting the lower end of another bundle can be provided. In this case, since the reinforcing member is a cable, the weight is reduced, and the shortage of the ceiling height, which is a weak point of the cable dome structure, is solved.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0013]
1 and 2 are a half sectional plan view and a half sectional side view of a cable dome structure according to the present invention.
[0014]
In the figure, a dome structure 10 is arranged radially with a center compression ring 1 as a center, and a plurality of radial lattice materials 2 curved upward with the compression ring 1 as a vertex, and a compression ring inside the radial lattice material 2 A plurality of circumferential lattice materials 3 arranged concentrically around 1, a plurality of bundle members 4 arranged perpendicular to the intersections of each circumferential lattice material 3 and radial lattice material 2, and An inclined cable 5 connecting the lower end of the bundle 4 and the upper end of another bundle 4 adjacent to the bundle 4 in the radial direction, and the lower end of each bundle 4 and the bundle 4 are adjacent to each other in the circumferential direction. A circumferential cable 7 that connects the lower end of another bundle 4 is provided.
[0015]
In addition, in this embodiment, the dome roof 10 is divided into a central roof portion 12, an intermediate roof portion 14, and a peripheral roof portion 16 concentrically from the center thereof, and a tension ring 12a on the eaves side of the central roof portion 12 is formed. (Outer circumferential circumferential lattice material) and a compression ring 14a (inner circumferential circumferential lattice material) on the ridge side of the intermediate roof portion 14 are extended from the bundle material 4 and vertically raised. A plurality of vertical members 18a constituting the portion 18 are connected, and similarly, the eaves side tension ring 14b of the intermediate roof portion 14 and the ridge side tension ring 16b of the peripheral roof portion 16 are connected by a number of vertical members 18a. The intermediate roof portion 14 is lifted from the peripheral roof portion 16 by the height of the rising, and the central roof portion 12 is lifted from the intermediate roof portion 14 so that the overall height of the building is higher than that of a general dome structure. Becomes ability also can reduce the roof 12a by giving tension to the inclined cable 5, 14a, 14b, 16a, the stress applied to 16b.
[0016]
Further, the vertical members 18a are connected by a brace material 18b to reinforce the cylindrical portion 18.
[0017]
In FIG. 1, the bundle 4 is indicated by a dot, and the arrow indicates the direction of tension applied to the inclined cable 5. Reference numeral 16b in the drawing denotes a tension ring on the eaves side of the peripheral roof portion 16.
[0018]
The stiffening parts 20 can also be arranged on the substantially trapezoidal surfaces defined by the radial lattice material 2 and the circumferential lattice material 3 of the dome structure constituted by the members described above.
[0019]
As shown in an enlarged view of a part of FIG. 1, this stiffening part has a pole 24 erected at the center of a trapezoidal lattice frame 22, and the upper and lower ends of the pole 24 and the four rounds of the lattice frame 22. This is a unit including two pairs of cables 26 stretched by applying a pretension between the corner portions.
[0020]
In addition, it is also possible to use this stiffening part 20 with a light membrane roof or the like stretched from the beginning, or after constructing all the stiffening parts 20, the entire surface may be covered with a roof membrane. .
[0021]
As described above, in the structure in which the entire structural surfaces of the upper chord members 2 and 3 are covered with the stiffening parts 20, the entire structure can obtain a stiffening effect on the structure of the upper chord members 2 and 3, so that the horizontal direction This will increase the yield strength.
[0022]
Next, the assembly procedure of the cable dome structure 10 having the above configuration will be described with reference to FIGS. First, FIG. 3 conceptually shows the intermediate roof portion 14 in an exploded manner. The lower chord member 6 and the upper chord members 2 and 3 of the above cable strut structure are separated for easy understanding on the drawing. Although it is shown in the drawing, the structural unit of the donut-shaped intermediate roof portion 14 having a central opening is constructed by assembling simultaneously and integrally.
[0023]
FIG. 4 shows that the structural unit of the intermediate roof 14 is assembled to the upper surface of the central opening of the structural unit of the peripheral roof 16 constructed in the same manner, and further the center is formed on the upper surface of the central opening of the structural unit of the intermediate roof 14. The case where the structural unit of the roof part 12 is assembled | attached is shown. In this case, the upper end of the vertical member 18a formed by lengthening the bundle member 24 attached to the opening edge of the peripheral roof portion 16 and raising the upper portion above the opening edge is joined to the tension ring 14b of the intermediate roof portion 14. By doing so, the two can be joined.
[0024]
Moreover, the attachment structure of the center roof part 12 with respect to the intermediate | middle roof part 14 is also the same, and becomes a frame structure shown in FIG. 5 in an assembly state.
[0025]
It is preferable that a diagonal member 18b is attached between the adjacent vertical members 18a and 18a to form a truss structure.
[0026]
The tubular portion 18 can be ventilated inside and outside the structure through the tubular portion 18 without opening a roof membrane, and an openable shutter or curtain is disposed as necessary. The structure can be shielded and ventilated. In any case, since the opening surface is a vertical surface, dust due to air circulation does not stagnate in each part, and cleaning management becomes easy.
[0027]
In the present embodiment, the configuration is shown in which the roof is divided into the three roof portions of the center, the middle, and the periphery. However, it is only necessary to divide the roof into two, and it is of course possible to further divide into multiple stages as necessary. It is.
[0028]
【The invention's effect】
As apparent from the above description, in the dome structure according to the present invention, by using the vertical surface of the cylindrical portion as a ventilation opening, natural ventilation inside and outside the structure is possible, and the conventional shelf Compared with the case of using a plate-shaped gap to ventilate, dust is less likely to accumulate and the maintenance cost can be reduced. In addition, stiffening parts are arranged on the substantially trapezoidal surfaces defined by each radial lattice material and circumferential lattice material, and the stiffening parts are arranged at the center of the trapezoidal lattice frame. The unit is equipped with two pairs of cables that are stretched by applying pretension between the upper and lower ends of the pole and the corners of the four circumferences of the lattice frame. The stiffening effect on the structure is obtained and the proof stress in the horizontal direction increases.
[0029]
Moreover, in this invention, ceiling height can be ensured high enough by setting it as a multistage roof type | mold via a cylindrical part.
[0030]
Furthermore, if the reinforcing member is a cable, the weight is reduced and the shortage of the ceiling height, which is a weak point of the cable dome structure, is solved.
[Brief description of the drawings]
FIG. 1 is a half sectional plan view of a multistage dome structure according to the present invention.
FIG. 2 is a side view of the same half cross section.
FIG. 3 is an exploded view showing an assembly structure of an intermediate roof portion.
FIG. 4 is an exploded view showing an assembly structure of each roof portion.
FIG. 5 is a perspective view showing the assembled frame.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Center compression ring 2 Radial lattice material 3 Circumferential lattice material 4 Bundle material 6 Lower chord material 10 Dome structure 12 Central roof part 14 Middle roof part 16 Peripheral roof part 18 Cylindrical part (18a vertical material, 18b diagonal material)
20 Stiffening parts

Claims (3)

Composed of upper chord material and lower chord material, the upper chord material is divided into a plurality of radial lattice materials, a plurality of concentric circumferential lattice materials intersecting with each radial lattice material, a circumferential lattice material and a radial lattice material. In the dome roof made up of vertically arranged bundles,
The dome roof is divided into a plurality of concentric shapes from the center of the top, and is connected between the eaves side edge and the ridge side edge of each divided roof part with a cylindrical part, to form a multi-stage dome roof shape ,
Stiffening parts are arranged on the substantially trapezoidal surface partitioned by each radial lattice material and circumferential lattice material,
The stiffening part has a pole erected at the center of a trapezoidal lattice frame, and is stretched by applying pretension between the upper and lower ends of the pole and the corners of the four circumferences of the lattice frame. A multi-stage dome structure characterized by being a unit having a pair of cables .   2. The multistage dome structure according to claim 1, wherein the vertical surface of the cylindrical portion can be opened or opened as a ventilation opening.   An inclined cable that connects the lower end of the bundle and the upper end of another bundle adjacent to the bundle in the radial direction, the lower end of each bundle and the lower end of another bundle adjacent to the bundle in the circumferential direction The multi-stage dome structure according to claim 1, further comprising a circumferential cable connecting the two.

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