JP3709607B2 - Roof frame - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roof frame particularly suitable for use in a large-span dome-shaped roof or the like.
[0002]
[Prior art]
Conventionally, as a roof frame when constructing a roof having a large span dome shape, an elliptical parabolic shell shape, or a composite curve thereof, for example, multiple cables introduced with tension between support members of the roof frame are mutually connected. It is known that these cables are erected in a direction orthogonal to each other and roof membranes are stretched in a single or double manner. In such a roof frame, the cable does not obstruct the field of view relatively, so there is an advantage that a bright space can be realized and the appearance is excellent, but the roof shape is maintained with the strength of only the cable. Because it is impossible to do so, it must be an air film structure that maintains the roof shape by applying a positive pressure to the inside, so that the interior space is limited to a sealed building, and the roof Since a uniform pressure acts on the entire surface of the membrane, there are certain restrictions on the roof shape.
[0003]
[Problems to be solved by the invention]
On the other hand, as another roof frame of this type, a steel frame member made of a large number of steel pipes or the like is laid in a lattice shape in a direction crossing each other so as to have the curved surface as a whole, and the frame A structure in which a roofing material is mounted on a member is also constructed. According to this roof frame, since the steel frame member can resist the axial force and the out-of-plane bending moment, there is an advantage that it can be applied to various buildings.
However, in the roof frame, since the full load is supported only by the frame members, the frame members are enlarged, and the frame members are installed in a lattice shape. Since the rigidity is low and therefore inferior in stability, it is necessary to use high rigidity as each frame member.As a result, the frame becomes heavy and inferior in economic efficiency, and further, the appearance also deteriorates, In particular, it was difficult to apply to a large span space.
[0004]
For this reason, as a means for solving the above-mentioned problem, a structure in which the grid pattern of the frame member is made triangular to increase the rigidity of the frame has been proposed. However, the number of the frame members is increased, which is uneconomical. Moreover, since the frame members are not arranged linearly, there is a problem that it is difficult to attach the roof membrane. In addition, the number of joints gathered at the joint increases to 6 and the structure of the joint becomes complicated, requiring a lot of labor for the construction. As a result, the manufacturing cost of the entire roof frame increases. There was a problem of becoming.
[0005]
The present invention has been made to effectively solve the problems of the conventional roof frame, and can obtain high rigidity with a lightweight member. Therefore, even when applied to a large span, it is light and high. An object of the present invention is to provide a roof frame that provides structural stability, is easy to erection, and is economical.
[0006]
[Means for Solving the Problems]
The roof frame according to the first aspect of the present invention includes a plurality of roof frames that are installed between the frame support members in a direction intersecting each other to form a curved roof surface composed of a plurality of lattices as a whole and to which the roof members are attached. A frame member, a connection member disposed at the intersection of the frame members and connected to both ends of the frame members constituting each of the lattices, and at least two diagonal directions of the lattice between the connection members Each of which has a cable introduced with tension, and the connecting member includes a main body to which an end of the frame member is connected, a bundle hanging from the main body, and the bundle provided at the lower portion, and at least two pairs of cable support member to grip each independently of the diagonal direction of the cable, Ri Na these cable supporting members and a fixing means for fixing to the beam member, or It said at least two pairs of cable support member is characterized in that is rotatably provided in each plane of extension of the cable.
[0007]
Here, the invention described in claim 2 is characterized in that the frame member is made of an H-shaped steel in which the flange portions at both ends are vertically positioned, and the invention described in claim 3 is further provided. The cable support member according to claim 1 or 2 is a pair of discs sandwiching the cable, and the fixing means is inserted into a central portion of the disc so that the disc is attached to the bundle member. Further, the cable is further stretched by two in the diagonal direction, and is sandwiched between opposing surfaces of the disk with the bolt interposed therebetween. To do.
[0008]
According to the invention of any one of claims 1 to 3, the frame member resists axial force and out-of-plane bending moment, and tension is introduced to stretch the frame member in both diagonal directions. In order to resist the in-plane shearing force by the formed cable, a lightweight and excellent structural stability is constructed. As a result, not only its own weight, but also sufficient proof stress and rigidity against unbalanced loads due to earthquakes, winds, snow, etc. are maintained, and the density of each grid can be reduced, that is, the total number of grids can be reduced. Therefore, the appearance is also excellent. In addition, as a result of being arranged in a lattice shape, the frame members are installed in a straight line, so that the roof membrane can be easily attached.
[0009]
In addition, the connecting member to which both ends of the frame member are connected has a small number of parts, so that the production thereof is simple, and the main body unit to which the end of the frame member is connected and the cable support member that holds the cable Since the bundle material is interposed between the two, the construction of the frame member and the cable tensioning operation do not interfere with each other, and the construction is facilitated.
In addition, since the two sets of cable support members are each rotatably provided in the plane in which the cable extends, by loosening the fixing means when introducing tension into the cable, The cable support member can be freely rotated and placed in accordance with the actual alignment of each cable, so that the tension acting between different cables is not significantly different, and a uniform rigidity is achieved. can get. Further, it is possible to prevent unnecessary bending stress and shear stress from being generated in the bundle member and the cable support member due to the mismatch with the cable alignment.
[0010]
Furthermore, since an independent cable support member is provided for each cable at the lower end of the bundle member, and this is fixed to the bundle member by the fixing means, the frame member at a location where reinforcement is required for strength is added. By arranging the cable support members in a stacked form, it is possible to add cables partially along the frame members.
[0011]
In particular, in the invention described in claim 2, H-shaped steel is used as the frame member, and the H-shaped steel is arranged with the strong axis in the out-of-plane direction and the weak axis in the in-plane direction. Since it is disposed, it is possible to obtain a high bending strength, and thus it is possible to construct a frame that is lighter and has excellent structural stability. Further, if a sound absorbing material is attached to the H-shaped steel web surface, the reverberation time in the internal space can be adjusted.
Further, according to the invention described in claim 3, since the two cables are stretched in the diagonal direction, and are sandwiched between the opposing surfaces of the disk with the bolts interposed therebetween. The diameter of each cable can be reduced. As a result, the disk is thinned and the cable support member is reduced in size, and the cable becomes less conspicuous in appearance and the appearance as a frame is further improved.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show an embodiment in which the roof frame according to the present invention is applied to a dome-shaped roof. In FIG. 4, reference numeral 1 is installed between support members 2 of the frame and is loose as a whole. It is a roof frame that forms a convex curved surface.
As shown in FIG. 3, the roof frame 1 is constructed in a direction orthogonal to each other, and a plurality of frame members 3, which form the roof curved surface composed of a plurality of square lattices as a whole, and these frame members 3. Connecting members 4 disposed at the intersections of the cables, and cables 5... Installed between the connecting members 4 and 4 in both diagonal directions of the lattice and introduced with tension. . As a result, the square lattice formed by the cables 5 is in a phase rotated by 45 ° with respect to the square lattice formed by the frame members 3.
Here, H-shaped steel is used as the frame member 3, and the flange portions at both ends of the web are positioned vertically. Two cables 5 are stretched in each diagonal direction.
[0013]
On the other hand, as shown in FIGS. 1 and 2, the connecting member 4 includes a main body 6 to which the end portions 3a of the frame members 3 constituting the respective lattices are connected, and a bundle depending from the main body 6. A material 7, two sets of cable support members 8 disposed at the lower end of the bundle material 7, a bolt 9 and a nut 10 that integrally connect the cable support member 8, the bundle material 7, and the main body 6. It is roughly composed.
The main body portion 6 is formed by closing both ends of a steel pipe having a dimension slightly longer than the height of the frame member 3 with disc-like lid bodies 6a and 6b, and in the center of the lid bodies 6a and 6b. A hole 11 through which the bolt 9 is inserted is formed. The bundle member 7 is a steel pipe having a predetermined length dimension and a diameter smaller than that of the main body portion 6, and is arranged with the main body portion 6 aligned with the axis.
[0014]
Further, the cable support member 8 is composed of two discs 12 and 12 each sandwiching two cables 5, and the bolts 9 are respectively provided at the centers of the discs 12 and 12. A hole 14 to be inserted is drilled. In addition, two grooves 13 and 13 into which the cables 5 and 5 are fitted are formed on opposite surfaces of the disks 12 and 12 with the hole 14 interposed therebetween. Then, the cables 5 are fitted into the respective grooves 13, whereby the two cables 5 are sandwiched between the disks 12 and 12. As a result, the two cables 5 and 5 stretched in different directions are sandwiched by the independent cable support members 8.
[0015]
In the cable support member 8 and the bundle member 7, the bolt 9 is inserted into the hole portion 11 of the main body portion 6 from the hole portion 14 side of the disk 12 through the bundle member 7, and the nut 10 is screwed into the head portion. By being combined, as shown in FIG. 2, the body portion 6 is integrally fixed. Here, the bolt 9 and the nut 10 constitute fixing means for fixing the cable support members 8 and 8 to the main body 6 via the bundle material 7. Incidentally, the cable support member 8 is rotatably provided around the bolt 9 in the plane in which the cable 5 extends in a state where the nut 10 is slightly loosened.
Furthermore, a dome-shaped roof is formed by attaching a belt-like roof membrane over a plurality of lattices on the outer periphery of the frame member 3 of the roof frame 1.
[0016]
According to the roof frame 1 having the above configuration, the frame members 3 can resist the axial force and the out-of-plane bending moment, and both the diagonal directions of the frame members 3 are introduced by the tension. In addition to being able to resist the in-plane shearing force by the cables 5 stretched on the H-shaped steel, the H-shaped steel is used as the frame member 3 and the strong shaft is in the out-of-plane direction. Since the weak axis is arranged along the in-plane direction, a high bending strength can be obtained, and thus a frame that is extremely lightweight and excellent in structural stability can be configured. Incidentally, it was confirmed that according to the frame composed of the frame members 3... And the cables 5..., The rigidity about 3 times that of the frame composed only of the frame members 3.
As a result, not only its own weight, but also sufficient proof stress and rigidity can be maintained against uneven loads due to earthquakes, winds, snow, etc., and the density of each grid is further reduced, in other words, the number of grids is reduced. Therefore, an excellent appearance can be obtained, and even when applied to a large span space, a homogeneous and bright space with excellent structural stability can be realized.
[0017]
In addition, if a sound absorbing material is attached to the H-shaped steel web surface, the effect of adjusting the reverberation time in the internal space can be obtained.
Further, two cables 5 are stretched in each diagonal direction, and the bolts 9 are sandwiched between the opposing surfaces of the disks 12, 12, so that the diameter of each cable 5 is Can be reduced. As a result, the thickness of the disk 12 can be reduced, and the cable support member 8 can be reduced in size, and the cable 5 becomes less conspicuous in appearance, thereby further improving the appearance of the frame.
[0018]
In construction, as a connecting member 4 to which both end portions 3a of the frame member 3 are connected, a main body portion 6 to which the end portion 3a of the frame member 3 is connected, and a bundle material 7 suspended from the main body portion 6; In addition, two sets of cable support members 8 and 8 that are provided at the lower end portion of the bundle member 7 and independently hold each of the diagonal cables 5 are integrated by bolts 9 and nuts 10. Therefore, the number of parts is small, so that the production is simple and the construction is easy.
Furthermore, since the bundle member 7 is interposed between the main body portion 6 to which the end portion 3a of the frame member 3 is connected and the cable support member 8 that holds the cable 5, the construction of the frame member 3 The installation work of the cable 5 does not interfere with each other, and the installation work becomes easier.
[0019]
In addition, in the state where the nut 10 is slightly loosened, the two sets of cable support members 8 and 8 are rotatably provided in the plane in which the cables 5 extend, respectively. For example, when the cable support members 8 and 8 are introduced, the cable support members 8 and 8 are freely rotated in the extending direction of the cable 5, so that the cables 5 can be arranged following the actual alignment of the cables 5. For this reason, unnecessary bending stress and shearing stress due to inconsistency with the alignment of the cables 5 are not generated in the bundle material 7 and the cable support member 8, and tension acting between different cables 5 is not generated. There is no significant difference. Note that after the cable support member 8 is aligned with the alignment of the cable 5, the nut 10 is firmly tightened so that the cable support member 8 does not rotate and the cable 5 is between the disks 12 and 12. Fix so that it does not slide.
[0020]
In the description of the above embodiment, two sets of cable support members 8, 8 are arranged at the lower end of the bundle member 7, and these cables are stretched in both diagonal directions of the lattice formed by the frame member 3. Although only the case where 5 is supported independently was demonstrated, it is not restricted to this, In the roof frame which concerns on this invention, about the frame member 3 of the location which needs reinforcement in intensity | strength among the whole frame further Is obtained by arranging an additional cable support member 8 in a laminated form at the lower end of the bundle member 7 and adding a cable 5 stretched along the frame member 3 in addition to the cable 5. The rigidity of the skeleton member 3 can be increased, and therefore, there is an advantage that the out-of-plane bending rigidity can be easily locally increased at a desired portion in terms of strength.
[0021]
【The invention's effect】
As described above, according to the invention described in any one of claims 1 to 3, it is possible to obtain a frame that is light in weight and excellent in structural stability, and is therefore sufficient even when applied to a large span space. In addition, it is possible to ensure a sufficient proof stress and rigidity, and it is possible to reduce the density of each lattice, so that the appearance is also excellent. In addition, as a result of being arranged in a lattice shape, the frame members are installed in a straight line, so that the roof membrane can be easily attached. In addition, since the connecting member has a small number of parts, it is easy to manufacture, and the bundle member does not interfere with the construction of the frame member and the cable tensioning operation, and these constructions are easy. Become.
In addition, the cable support members that independently support the cables in each direction can be arranged following the actual alignment of each cable, so that the tension acting between different cables is greatly different. And uniform rigidity is obtained.
[0022]
In particular, according to the invention described in claim 2, since the H-shaped steel is used as the frame member, a high bending strength can be obtained, and thus a frame that is lighter in weight and excellent in structural stability is configured. In addition, according to the invention described in claim 3, the diameter of each cable can be reduced, so that the disk is thinned and the cable support member is reduced in size. As a result, the cable is less noticeable in appearance and the appearance as a frame is further improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a structure of a connecting portion in an embodiment of a roof frame according to the present invention.
FIG. 2 is a perspective view showing the connecting portion.
FIG. 3 is a perspective view showing a main part of the roof frame according to the embodiment.
FIG. 4 is a schematic perspective view showing an overall configuration of the roof frame.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Roof frame 2 Support member 3 Frame member 3a End part 4 Connection member 5 Cable 6 Main body part 7 Bundling material 8 Cable support member 9 Bolt (fixing means)
10 Nut (fixing means)
12 disc

Claims (3)

Between the supporting members of the frame, they are installed in the direction intersecting each other to form a roof curved surface consisting of a plurality of lattices as a whole, and a plurality of frame members to which the roof members are attached, and arranged at the intersections of these frame members A connecting member in which both ends of the frame members constituting each of the lattices are connected, and a cable in which tension is introduced between the connecting members and is installed at least in both diagonal directions of the lattice. The connecting member is provided at a main body portion to which an end portion of the frame member is connected, a bundle member suspended from the main body portion, and a lower end portion of the bundle member, and the diagonal cable at least two pairs of cable support members each of which independently gripping, Ri name these cable supporting members and a fixing means for fixing to the beam member, and the at least two pairs of cable supporting portions The roof Frames and being provided freely each rotation in a plane of extension of the cable. 2. The roof frame according to claim 1, wherein the frame member is made of H-shaped steel with flange portions at both ends positioned vertically. The cable support member is a pair of discs that sandwich the cable, and the fixing means is a bolt that is inserted through a central portion of the disc and fixes the disc to the bundle. The roof according to claim 1, wherein two roofs are stretched in each diagonal direction, and are sandwiched between opposing surfaces of the disc with the bolt interposed therebetween. Frame.

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