Truss roof structure and wooden building

Abstract

To provide a roof structure and a wooden building that can obtain sufficient wind resistance properties even if cross members are omitted.SOLUTION: Wind-resistant columns 200 are built extending from beams 210 to an upper part of a truss structure, thus extension parts 202 are formed. The extension parts 202 are interposed between truss structures 150. Specifically, truss structures 150A and 150B are adjacent to each other, and the extension parts 202 are interposed between upper chord members 152A, 152B and lower chord members 154A, 154B of the truss structures. In this way, the truss structures 150A, 150B serve as fulcrums for deflection at the upper part of the wind-resistant columns 200, making it possible to omit cross members.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to roof structures and wooden buildings, and in particular to improvements in wind-resistant structures suitable for use with truss-structured roof units. [Background technology]

[0002] In conventional wooden buildings, wind-resistant beams are provided on columns to reinforce exterior walls and window glass so that they do not break when the wind blows. An example is shown in Fig. 4, in which a horizontal member 110 is hung horizontally on a vertically erected column 100, which serves as a support for the column. A number of beams 120 are vertically attached at appropriate intervals to the horizontal member 110. A ridge beam 130 and a purlin 132 are provided at the top of the beams 120 in parallel to the horizontal direction, and a number of rafters 140 are provided at appropriate intervals in a direction perpendicular to the ridge beams 130 and purlins 132. The beams 120 are arranged so that their lengths gradually decrease from the center to both ends, creating a slope in the rafters 140, which becomes the slope of the roof.

[0003] For the above-mentioned roof structure, the applicant of the present application has also proposed a truss structure, as disclosed in, for example, the following patent document. As shown in FIG. 5, a beam 162 is provided in a direction perpendicular to a vertically erected column 160 and is supported by the column 160. A required number of truss structures 150, which are roof units of the truss structure, are provided in parallel at appropriate intervals on the beam 162. In the illustrated example, the truss structure 150 is a double-how truss, and is composed of an upper chord member 152, a lower chord member 154, and web members 156 and 158 that support them. A web member 158 is provided diagonally between the web members 156, thereby forming a truss. The upper chord member 152, the lower chord member 154, and the web members 156 and 158 are joined by, for example, nail plates. A large number of truss structures 150 are arranged at appropriate intervals. A ceiling panel 170 is attached to the lower chord member 154 of the truss structure 150. On the other hand, the length of the web members 156 gradually decreases from the center toward both ends, which creates a slope in the upper chord member 152. A sheathing board 172 is provided on the upper chord member 152. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-35624 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, even the truss roof structure of the background art described above can provide the necessary wind resistance, but it would be advantageous if the wind resistance could be further improved.

[0006] The present invention focuses on the above-mentioned points, and its object is to provide a roof structure and a wooden building which can obtain sufficient wind resistance even when the cross members are omitted when the roof unit is of a truss structure. [Means for solving the problem]

[0007] The truss roof structure of the present invention is a truss roof structure in which a plurality of truss frames arranged in parallel are supported by columns, and is characterized in that at least one of the columns is extended to provide an extension portion, and the extension portion is sandwiched and connected by any of the truss frames. In a main form, the extension portion is sandwiched by at least one of the upper chord, web member, and lower chord of the truss frame, or by the upper chord and lower chord. For example, nails or screws are used to connect the extension portion to the upper chord, web member, and lower chord. For example, two-by-four lumber is used as the upper chord, web member, and lower chord.

[0008] The present invention relates to a wooden building having a truss roof structure as described above, and is characterized in that it omits the cross members. The above and other objects, features, and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings. Effect of the Invention

[0009] According to the present invention, the extension portion of the wind-resistant column is sandwiched between the truss structure, so that even if the cross member is omitted, not only is sufficient strength obtained, but also further improvement in wind resistance can be achieved. [Brief description of the drawings]

[0010] [Figure 1] 1 is a diagram showing a roof structure in Example 1 of the present invention, in which (A) shows the main part of the roof structure, (B) is a view from the direction of the arrow FB, and (C) is a view from the direction of the arrow FC. [Diagram 2] 1(A) is a diagram showing an example of nail driving in the embodiment 1. FIG.1(A) corresponds to FIG.1(C), and FIG.1(B) is a diagram showing FIG.1(A) as viewed from the direction of the arrow FD. [Diagram 3] FIG. 11 is a diagram showing a roof structure in a second embodiment of the present invention. [Figure 4] FIG. 1 is a diagram showing a conventional roof structure. [Diagram 5] FIG. 1 is a diagram showing a conventional truss roof structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a mode for carrying out the present invention will be described in detail based on examples. In the following description, the pillar having the extension part of the present invention will be referred to as a "wind-resistant pillar" in order to distinguish it from the pillar of the background art described above. EXAMPLES

[0012] Fig. 1(A) shows a roof structure in one embodiment of the present invention, and Fig. 1(B) and (C) show the roof structure as viewed from the arrows FB and FC, respectively. In these figures, a vertically erected wind-resistant column 200 is provided with parallel beams 210 in a direction perpendicular to the column. The beams 210 are fastened to the side of the wind-resistant column 200 with metal fittings or tenons. The above-mentioned truss structure 150 is installed parallel to the wind-resistant column 200 at appropriate intervals across it.

[0013] In this embodiment, as shown in detail in FIG. 1(C), the wind-resistant column 200 extends from the beam 210 to the upper part of the truss frame, forming an extension part 202. The extension part 202 is sandwiched by the truss frame 150. That is, the truss frames 150A and 150B are adjacent to each other, and the extension part 202 is sandwiched between the upper chord members 152A and 152B and the lower chord members 154A and 154B. The upper chord members 152A and 152B or the lower chord members 154A and 154B are connected and fixed to the extension part 202 by, for example, nailing. The tip 204 of the extension part 202 is an inclined surface that follows the inclination of the upper chord members 152A and 152B.

[0014] An example of nailing is shown in Figures 2(A) and (B). As shown in these figures, multiple nails or screws 180 are driven at right angles (perpendicular to the side surface) at appropriate intervals from the side surface of the upper chord members 152A and 152B toward the side surface of the extension part 202 of the wind-resistant column 200.

[0015] In this way, when the wind-resistant column 200 is extended and the extension portion 202 is sandwiched between the truss structures 150A and 150B, the truss structures 150A and 150B become the fulcrum of the deflection of the upper part of the wind-resistant column 200. Therefore, according to this embodiment, the cross member can be omitted. In the conventional structure shown in FIG. 4, the cross member 110 is used as the fulcrum of the deflection of the upper part of the wind-resistant column, but this cross member 110 needs to be long and large in cross section when the building is large. In contrast, if the truss structures 150A and 150B are used as the fulcrum of the deflection of the upper part of the wind-resistant column as in this embodiment, there is an advantage that the cross member with a large cross section and long is not required. EXAMPLES

[0016] Next, a second embodiment of the present invention will be described with reference to FIG. 3. The above embodiment is an example in which a wind-resistant column is sandwiched between the upper and lower chord members of a truss frame, but this embodiment is an example in which a wind-resistant column is also sandwiched between a web member. FIG. 3(A) is an example in which a wind-resistant column 300 is extended from a beam 310 to the upper part of the truss frame, and an extension part 302 is formed. The tip 304 of the extension part 302 is an inclined surface that follows the inclination of the upper chord members 352A and 352B. The extension part 302 is sandwiched between the upper chord members 352A and 352B, the lower chord members 354A and 354B, and the web members 356A and 356B of the truss frames 350A and 350B, respectively, and they are connected and fixed by nails or screws 380, as in the above embodiment.

[0017] The example in the same figure (B) is an example for the case of an above-water side, single-slope building, in which a wind-resistant column 400 is extended from a beam 410 to the top of the truss structure, forming an extended portion 402. A tip 404 of the extended portion 402 forms an inclined surface that follows the inclination of upper chord members 452A, 452B. The extended portion 402 is sandwiched between upper chord members 452A, 452B, lower chord members 454A, 454B, and web members 456A, 456B of truss structures 450A, 450B, respectively, and these are joined and fixed with nails or screws 480, as in the previous embodiment.

[0018] <Other Examples> The present invention is not limited to the above-described examples, and various modifications can be made without departing from the scope of the present invention. For example, the following are also included. (1) The shapes and structures shown in the above embodiments are merely examples, and the present invention is not limited to them in any way. (2) There are various types of roof structures, such as gable, hip, and slope, but the present invention is applicable to all of them. (3) The structure of the truss frame is similar. In addition to the double Howe truss mentioned above, various types are known, such as the fink truss, scissor truss, and attic truss, and any of these may be applied. (4) In the above embodiment, the tip of the column is sandwiched by the truss structure, but for example, one end of the truss structure may be a wind-resistant column and the other end may be a bundle, and each may be sandwiched by the truss structure. Also, the column may be sandwiched in the middle of the truss structure, not at both ends. (5) When multiple truss structures are provided, it is not necessary for all of the truss structures to sandwich wind-resistant columns or beams, and truss structures that do not sandwich wind-resistant columns may be provided between truss structures that sandwich wind-resistant columns. (6) The wood used for the upper chord, web, and lower chord of the truss structure may be various known materials such as SPF and white wood. Also, two-by-four lumber may be used as the size. [Industrial Applicability]

[0019] According to the present invention, the extension part of the wind-resistant column is sandwiched between the truss structure, so that even if the cross member is omitted, not only is sufficient strength obtained, but further improvement in wind resistance can be achieved, making it suitable for wooden buildings that use truss roof structures. [Explanation of symbols]

[0020] 100: Pillar 110: Cross beam 120: Bunch 130: Ridge pole 132: Main house 140: Rafter 150, 150A, 150B: Truss structure 152,152A,152B:Top chord material 154, 154A, 154B: Lower chord 156, 158: Web material 160: Pillar 162: Beam 170: Ceiling panel 172: Field board 180: Nail (Screw) 200: Wind-resistant pillar 202: Extension section 204: Tip 210: Beam 300: Wind-resistant pillar 302: Extension section 304: Tip 310: Beam 350A, 350B: Truss structure 352A, 352B: Top chord material 354A, 354B: Lower chord 356A, 356B: Web material 380: Nail (Screw) 400: Wind-resistant pillar 402: Extension section 404: Tip 410: Beam 450A, 450B: Truss structure 452A, 452B: Top chord material 454A, 454B: Lower chord 456A, 456B: Web material 480: Nails (Screws)

Claims

1. A truss roof structure in which a plurality of truss frames arranged in parallel are supported by columns, At least one of the columns is extended to provide an extension portion; A truss roof structure characterized in that the extension portion is sandwiched and connected between any of the truss structures.

2. The truss structure includes an upper chord, a web member, and a lower chord, 2. A truss roof structure as claimed in claim 1, wherein the extension of said column is sandwiched between at least one of said upper chord, web member and lower chord.

3. The truss structure includes an upper chord, a web member, and a lower chord, 2. A truss roof structure according to claim 1, wherein the extension portion of the column is sandwiched between at least the upper chord member and the lower chord member.

4. 3. A truss roof structure according to claim 2, wherein at least one of the upper chord, web member and lower chord member is connected to the extension portion of the column by means of nails or screws.

5. 3. A truss roof structure according to claim 2, wherein the upper chord, web member and lower chord are made of two-by-four members.

6. A wooden building comprising a truss roof structure according to any one of claims 1 to 5, characterized in that a cross member is omitted.

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