Roof structure

Abstract

To provide a roof structure capable of easily securing an effective space below a roof body.SOLUTION: A roof structure comprises: a roof body 10 inclined to both sides of a top part (a ridge line 10E); a support pole 20 supporting the roof body 10; and a plurality of tension materials 40 stretched from an upper end of the support pole 20 to a plurality of parts of a tip of the roof body 20.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a roof structure.

Background Art

[0002] The following Patent Document 1 shows a roof beam reinforcement structure for reinforcing a gable roof beam and a timber laid across the roof beam.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a roof structure in which a timber, which is a tension member, is laid across the tip ends of a roof beam as in the roof beam reinforcement structure of Patent Document 1 above, since the timber crosses the space, the effective space below the roof body is limited to below the timber.

[0005] In consideration of the above fact, an object of the present invention is to provide a roof structure that easily secures an effective space below the roof body.

Means for Solving the Problems

[0006] The roof structure according to claim 1 includes a roof body inclined to both sides of the top, a support column erected on a foundation, from below the top of the roof body a support column for supporting, and a plurality of tension members spanned from the upper end portion of the support column to a plurality of locations at the tip of the roof body. below the roof body

[0007] In the roof structure according to claim 1, the roof body is inclined to both sides of the top. For this reason, a thrust force due to its own weight and a load is applied to the roof body, and the roof body tends to open outward.

[0008] Here, in this roof structure, a plurality of tension members are spanned from the upper ends of the support columns that support the roof body to a plurality of locations at the tip of the roof body. Therefore, the thrust force acting on the roof body is processed by the tension members bearing the tensile force.

[0009] As a result, it is not necessary to provide a tie bar or the like for connecting the tip portions of the roof body to each other. Therefore, it is easy to secure an effective space below the roof body. The roof structure according to claim 2 is the roof structure according to claim 1, wherein the tension member is spanned from the upper end of one support column to a plurality of locations at both ends in the direction orthogonal to the ridge line of the roof body.

[0010] The roof structure according to claim 3 is a roof body inclined to both sides of the top, a support column standing on a foundation below the top of the roof body to support the roof body, and a plurality of tension members spanned from the upper end of the support column to a plurality of locations at the tip of the roof body. The support columns are respectively provided at two portions near the eaves of the roof body, and a compression member is spanned between the upper ends of the support columns.

[0011] Claim 3 In the roof structure of, two support columns are provided. Therefore, the tensile force acting on the support columns from the tension members can be dispersed. As a result, the dimensions of the support columns can be reduced.

[0012] Also, the two support columns are respectively provided at portions near the eaves of the roof body. Therefore, the upper end portions of the respective support columns are pulled by the tension members toward the central portion side of the roof body, that is, in the direction in which the respective upper end portions approach each other. However, since a compression member is spanned between the upper end portions of the support columns, it is possible to resist the tensile force acting on the upper end portions of the support columns. The roof structure according to claim 4 is the roof structure according to claim 3, wherein a force that causes the support columns to approach each other acts on each of the support columns due to the tensile force acting from the tension member, and the compression member is disposed below the roof body to resist the approaching force.

[0013] The roof structure according to claim 5 is a roof body inclined to both sides of the top, a support column standing on a foundation below the top of the roof body to support the roof body, and a plurality of tension members spanned from the upper end of the support column to a plurality of locations at the tip of the roof body. The tension member includes a bundled member protruding below the roof body and a lower chord member connected to the lower end portion of the bundled member, and has a convex shape on the lower side.

[0014] Claim 5 In the roof structure of, the tension member has a convex shape on the lower side with the bundled member and the lower chord member. As a result, a tensile force due to the deflection of the beam also acts on the lower chord beam in the tension member. Therefore, the thrust force can be processed efficiently.

Effect of the Invention

[0015] According to the present invention, it is possible to provide a roof structure that easily secures an effective space below the roof body.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0017] Hereinafter, the roof structure according to the embodiment of the present invention will be described with reference to the drawings. Components denoted by the same reference numerals in each drawing mean the same components. However, unless otherwise specified in the specification, each component is not limited to one, and a plurality of them may exist. In addition, descriptions of overlapping configurations and reference numerals in each drawing may be omitted. Note that the present invention is not limited to the following embodiments, and appropriate changes such as omitting configurations or replacing them with different configurations can be made and implemented within the scope of the object of the present invention.

[0018] In each figure, the directions indicated by the arrows X and Y are directions along the horizontal plane and are perpendicular to each other. Also, the direction indicated by the arrow Z is a direction along the vertical direction (up and down direction). In each figure, the directions indicated by the arrows X, Y, and Z are assumed to coincide with each other.

[0019] <Roof Structure> As shown in the exploded perspective view of FIG. 1, the roof structure according to the embodiment of the present invention is formed by including a roof body 10, support columns 20, struts 30, and tie beams 40.

[0020] (Roof Body) The roof body 10 is a roof (so-called gable roof) having two planes inclined downward from the ridge line 10E along the Y direction to both sides in the direction (X direction) perpendicular to the ridge line 10E. The roof body 10 is formed using truss beams 12 along the X direction in order to reduce the number of columns in the X direction. Further, the truss beams 12 adjacent to each other in the Y direction are connected by connecting beams 14. Furthermore, braces 16 are spanned across the rectangular frames surrounded by the truss beams 12 and the connecting beams 14.

[0021] (Support Columns) The support columns 20 are structural members respectively arranged at both ends (so-called gable surfaces) in the Y direction below the ridge line 10E of the roof body 10, and support the load of the roof body 10. As the support columns 20, various structural forms such as steel frame, reinforced concrete, and steel frame reinforced concrete can be applied.

[0022] Note that the columns supporting the load of the roof body 10 are not limited to these two support columns 20, and can be appropriately arranged below the roof body 10, for example, like the column 20A shown by the dashed line. In this embodiment, the support column 20 is the column provided on the outermost side in the Y direction among the columns supporting the roof body 10 below the ridge line 10E.

[0023] (Strut) The strut 30 is a beam spanned between the upper end portions of the support columns 20. A tensile force T acts on the support columns 20 from the tie bar 40 to be described later. As a result, the upper end portions of the two support columns 20 tend to move in a direction approaching each other. Thereby, a compressive force C acts on the strut 30 from the support columns 20. The strut 30 functions as a compression member that resists this compressive force C.

[0024] The strut 30 is formed using, for example, H-shaped steel. However, in order to suppress buckling due to the compressive force C, the strut 30 can be formed of a steel pipe, or the H-shaped steel strut 30 can be surrounded by a steel pipe for supplementary stiffening. Also, the strut 30 can be preferably formed using steel reinforced concrete or the like.

[0025] Note that when arranging other columns (for example, column 20A) for supporting the roof body 10 between the support columns 20, the strut 30 can also be connected to this column 20A. Note that the column 20A arranged between the support columns 20 may be an intermediate column.

[0026] (Tie bar) As shown in FIGS. 2 and 3, the tie bar 40 is a tension member that is inclined and spanned from the upper end portions of the support columns 20 to a plurality of locations at the tip of the roof body 10. As the tie bar 40, various steel materials such as PC steel bars, wires, H-shaped steel, T-shaped steel, channel materials, and angle materials can be used. Note that in FIGS. 2, 5, and 6, the illustration of the roof body 10 is simplified for easy understanding of the arrangement of the tie bar 40.

[0027] Here, the "upper end portion" of the support column 20 means, as shown in FIG. 3, the portion included in the range from the upper end of the support column 20 to (1 / 3) of the length of the support column 20, and at least the portion higher than the height H1 of the tip of the roof body 10. Further, this "upper end portion" preferably means the portion included in the upper half range E1 in the vertical dimension H2 of the roof (the Z-direction dimension from the tip of the roof body 10 to the ridge line 10E of the roof body 10).

[0028] Also, the "tip" of the roof body 10 refers to the tip of the roof body 10 in the X direction, but does not necessarily refer to the "foremost tip" in the X direction of the roof body 10, and includes the entire eaves portion. This "eaves portion" includes, for example, the range E2 from the column 20B or the center line of the outer wall provided most outward in the X direction below the roof body 10 to the foremost tip of the roof body 10 in the X direction. Note that the column 20B is a column that supports the vertical force acting from the roof body 10. The column 20B may be provided below the foremost tip of the roof body 10 (that is, a configuration without eaves).

[0029] Also, the "plural locations" at the tip of the roof body 10 refer to a plurality of locations along the Y direction at the tip of the roof body, as shown in FIG. 2. In the present embodiment, the tie beams 40 are bridged from the upper end portions of the respective support columns 20 to three locations (three locations on one side in the X direction; six locations on both sides) at the tip of the roof body, but the number of these locations is not particularly limited.

[0030] Here, it is preferable that at least one of the tie beams 40 extending from the respective support columns 20 is bridged at a position close to the center (the position indicated by the center line CLY) in the Y direction at the tip of the roof body 10. The "position close to the center" is the range generally included in approximately 1 / 3 at the center of the span of the support column 20.

[0031] The thrust force at a position "other than" near the center of the roof body 10, that is, at a position near the end, is transmitted to a structural body (not shown) near the gable surface via the horizontal braces (braces 16) forming the roof body. Therefore, the thrust force generated at a position near the center is larger than the thrust forces generated at other parts.

[0032] Also, as shown in FIG. 3, tie bars 40 extend from each support column 20 to both sides in the X direction. As a result, the tensile force T in the X direction acting on the support column 20 is offset, and the support column 20 is prevented from deforming or moving in the X direction.

[0033] <Function and Effect> In the roof structure according to the embodiment of the present invention, as shown in FIG. 3, the roof body 10 is inclined to both sides of the top (ridge line 10E). Therefore, a thrust force F due to its own weight and the load is applied to the roof body 10, and the roof body 10 tends to open outward.

[0034] Here, in this roof structure, as shown in FIG. 2, tie bars 40 as a plurality of tension members are spanned from the upper end portions of the support columns 20 that support the top of the roof body 10 to a plurality of locations at the tip of the roof body 10. Therefore, as shown in FIG. 3, the thrust force F acting on the roof body 10 is dealt with by the tie bars 40 bearing the tensile force T.

[0035] As a result, it is not necessary to provide tie bars that connect the tip portions of the roof body 10 to each other, that is, tie bars 100 and the like shown by the two-dot chain line in FIG. 3, which are comparative examples. Therefore, it is easy to secure an effective space below the roof body 10.

[0036] Also, in the roof structure according to the embodiment of the present invention, as shown in FIG. 1, two support columns 20 are provided. Therefore, the tensile force T acting on the support columns 20 from the tie bars 40 can be dispersed. As a result, the dimensions of each support column 20 can be reduced.

[0037] Further, the two support columns 20 are respectively provided at both ends of the roof body 10 in the Y direction. Therefore, the upper end portions of the respective support columns 20 are pulled by the tie bars 40 toward the central portion side of the roof body 10, that is, in the direction in which the respective upper end portions approach each other.

[0038] However, since the strut 30, which is a compression member, is spanned between the upper end portions of the support columns 20, it can resist the tensile force T acting on the upper end portions of the support columns 20, that is, the compressive force C acting between the support columns 20.

[0039] <Modification Example> (Modification Example of Tie Bar) In the above-described embodiment, the tie bar 40 is spanned from the upper end portion of the support column 20 to the tip of the roof body 10, but the embodiment of the present invention is not limited thereto. For example, instead of this tie bar 40, a cable-stayed beam 50 shown in FIG. 4 may be provided.

[0040] The cable-stayed beam 50 includes a bundled member 52 protruding downward from the roof body 10 and a lower chord member 54 connected to the lower end portion of the bundled member 52, and has a convex shape on the lower side. The lower chord member 54 is spanned from the upper end portion of the support column 20 to the tip of the roof body 10.

[0041] With this configuration, a tensile force is generated in the lower chord member 54 due to the deformation of the roof body 10 when a load acts on the roof body 10. This tensile force can resist the thrust force. Note that a tensile force PT may be introduced in advance into the lower chord member 54 at the stage of assembling the cable-stayed beam 50.

[0042] (Modification Example of Support Column) In the above-described embodiment, the two support columns 20 are respectively arranged at both ends of the roof body 10 in the Y direction and below the ridge line 10E, but the embodiment of the present invention is not limited thereto.

[0043] For example, like the support column 22 shown in FIG. 5(A), the support columns in the present invention can be respectively arranged near both ends of the roof body 10 in the Y direction (positions near the gable side).

[0044] Here, "near" the both ends means a portion included in a range E3 within approximately (0.25W) from the end in the Y direction when the dimension of the roof body 10 in the Y direction is defined as a length W. By arranging the support columns 20 within this range E3, the support columns can stably support the roof body 10.

[0045] Further, for example, as in the support column 24 shown in FIG. 5(B), the structure may be such that only one support column (the support column over which the tie bar 40 is spanned) is provided. In this case, the tie bars 40 extend from the support column 24 to both sides in the Y direction and both sides in the X direction. Thereby, the direction of the tensile force acting from the tie bars 40 on the support column 24 is dispersed. Also, the structure may be such that the strut 30 is not provided.

[0046] Furthermore, for example, as in the support column 26 shown in FIG. 5(C), the support columns may be provided in two in a portion other than below the ridge line 10E in the X direction. In this case, the tie bars 40 are spanned from the upper end portions of the respective support columns 26 to one tip in the X direction of the roof body 10.

[0047] Also, in this case, in addition to the strut 32 spanned along the Y direction between the upper end portions of the support columns 26, it is preferable to provide a strut 34 spanned along the X direction. Note that this strut 34 may be substituted with, for example, a wall body formed between the support columns 26 adjacent in the X direction. Thereby, it is possible to suppress the deformation or movement of the support columns 26 adjacent in the X direction in a direction away from each other.

[0048] (Other Modification Examples) In the above-described embodiment, the roof body 10 is supported by two support columns 20 or other columns including two support columns, but the support structure of the roof body 10 is not limited to this.

[0049] For example, as shown in FIG. 6(A), a wall body 60 may be arranged on the roof surface of the roof body 10 where the support columns 20 are installed.

[0050] In the above-described embodiment, the strut 30 resists the tensile force T acting on the support column 20, but the embodiment of the present invention is not limited thereto. For example, instead of the strut 30, a backstay 62 may be used as shown in Fig. 6(B).

[0051] The backstay 62 is a tension member having one end joined to the upper end of the support column 20, extending along the Y direction and outside the two support columns 20, and the other end fixed to the foundation G or the like.

[0052] In the above-described embodiment, the shape of the roof body 10 has been described as a roof having two planes inclined from the ridge line 10E to both sides (so-called gable roof), but the embodiment of the present invention is not limited thereto.

[0053] For example, the roof body may be a semi-cylindrical (vault shape, bell shape) roof that curves and slopes from the top 18E (the linear portion located at the uppermost part in the roof body 18) to both sides as shown in the roof body 18 of Fig. 6(C). Even in such a shape, by applying the tie bar 40 or the like, it is easy to secure the effective space below the roof body 18 while dealing with the thrust force.

[0054] Furthermore, roofs having the same shape as the roof bodies 10 and 18 may be integrally connected continuously in the Y direction to the roof bodies 10 and 18. At this time, the lower structure of the roof connected to the roof bodies 10 and 18 does not necessarily have to include the support columns 22 and the tie bar 40, and various structures capable of supporting the roof can be selected.

Explanation of Reference Numerals

[0055] 10 Roof body 18 Roof body 20 Support column 22 Support column 24 Support column 26 Support column 30 Strut (compression member) 40 Tie bar (tension member) 50 Tensioned beam 52 Bundle material 54 lower chord member

Claims

1. A roof body inclined to both sides at the top, support columns standing on a foundation and supporting the top of the roof body from below, and a plurality of tension members spanned below the roof body from the upper ends of the support columns to a plurality of locations at the tips of the roof body. A roof structure comprising the above.

2. The tension member is spanned from the upper end of one support column to a plurality of locations at both tips in the direction orthogonal to the ridge line of the roof body. The roof structure according to Claim 1.

3. A roof body inclined to both sides at the top, support columns standing on a foundation below the top of the roof body and supporting the roof body, and a plurality of tension members spanned from the upper ends of the support columns to a plurality of locations at the tips of the roof body. Comprising the support columns are respectively provided at two portions near the gable sides of the roof body, and a compression member is spanned between the upper ends of the support columns. A roof structure.

4. On each of the support columns, a force that causes them to approach each other acts due to the tensile force acting from the tension member, the compression member is disposed below the roof body and resists the approaching force. The roof structure according to Claim 3.

5. A roof body inclined to both sides at the top, support columns standing on a foundation below the top of the roof body and supporting the roof body, and a plurality of tension members spanned from the upper ends of the support columns to a plurality of locations at the tips of the roof body. Comprising the tension member a bundled member protruding below the roof body, and a lower chord member connected to the lower end of the bundled member. A roof structure having a convex shape on the lower side.

Images