JP3676587B2 - Building roof structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roof structure of a building, and more particularly to a roof structure of a building characterized by a joining structure between a girder roof truss and a corner tree in a steel house and a reinforcing structure of the roof truss.
[0002]
[Prior art]
In steel houses, a frame is made of grooved steel formed by roll forming a thin steel plate with a thickness of about 0.5mm to 2.3mm, and each frame is joined with a fixing bracket to construct a building frame. doing. In the steel house described above, there are still points to be improved in the reinforcing structure and the joining structure of the dormitory roof.
[0003]
Referring to FIGS. 5 and 6, the dormitory roof shown in each figure was developed separately by the present inventor (currently unpublished application), and this figure shows one of the wives on the dormitory roof. Has been. In the figure, thin steel sheet-shaped channel steel is used for each member, and two eaves girders 1 and 2 that are parallel to each other are assembled in a rectangular shape. Each eaves girder 1 and 2 is attached to the upper ends of a plurality of pillars 3 (shown in FIG. 7) for mounting the wall of the building. In the figure, a girder roof truss 6 located at the end of the isosceles triangle composed of a lower chord member 4 and two upper chord members 5 is shown.
[0004]
An eaves roof 16 is constructed from two eaves corners 15 where two eaves 1 and 2 arranged in two directions extend to the top 11 of the girder roof truss 6 to construct an inclined frame of the dormitory roof. Is done.
[0005]
[Problems to be solved by the invention]
The above-mentioned roof structure has problems in terms of securing the strength of the roof truss, ensuring workability and ensuring accuracy in the joint structure between the girder roof truss and the corner tree. An object of the present invention is to provide a roof structure that solves these problems.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a triangular girder roof truss composed of a lower chord material and an upper chord material, a corner tree, an eaves girder, and a rafter erected on them. In the roof structure in which the berth is built, the top of the girder roof truss formed of channel steel, the top of the truss top joining the right and left upper chords to the back of the web of the left and right upper chords A metal piece is brought into contact, and both members are joined by a fixing metal fitting such as a bolt penetrating the upper chord material and the joint metal piece. On the other hand, at the end portion of the corner wood formed of channel steel, The back surface of the reinforcing corner wood having the same cross-sectional shape as the corner wood is arranged with a joining plate so that one end portion protrudes from the edge portion of the corner wood, and each member is fixed by a fixing metal fitting penetrating the contact portion. The central part of the corner joint metal fitting It features a structure in which both members are joined with a fixing metal fitting in contact with a lath top joining metal piece, and a bent plate of the corner wood joining hardware and a joining plate protruding from the end of the corner wood are brought into contact and both members are joined with the fixing metal fitting. To do.
Further, the present invention is characterized in that instead of the corner wood, a corner truss upper chord material having the same cross-sectional shape as the corner wood is joined to the truss top joint metal corner wood with the same joining structure as the corner wood.
In addition, the present invention is a roof structure that is constructed by a triangular roof truss composed of a lower chord material and an upper chord material, a corner tree, an eaves girder, and a rafter erected on them. Then, at the top of the roof truss formed of channel steel, the back of the upper chord material of the left and right upper chord material is disposed on the back surface of the upper chord material of the same cross-sectional shape as the upper chord material. The structure is formed by abutting the truss top joint hardware to be joined and joining the respective members by a fixing metal fitting penetrating the part.
[0007]
According to the first and second inventions, the corner wood is reinforced by the reinforcing corner wood having the same cross-sectional shape as this, and the fixing bracket such as a bolt is provided via the joining plate, the corner wood joining hardware, and the truss top joining hardware. This allows girder roof trusses and corner trees to be joined with easy construction on site.
Further, according to the third invention, the upper chord material of the girder roof truss (the same applies to other king post roof trusses) is reinforced without changing anything else by back-to-back bonding with the reinforcing upper chord material of the same cross-sectional shape. it can.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 to 2 show a frame structure of a gable part of a dormitory roof as a first embodiment. Any one of the upper chord material 5 of the girder roof truss 26 located at the end of the gable direction, the corner wood 16 and the bundle member 12 is shown. Is also composed of channel steel made of thin steel plate. At the top 31 of the girder roof truss 26, the truss top joint 8a that joins between the left and right upper chords 5 is brought into contact with the back of the web 20 of the left and right upper chords 5, so that the upper chord 5 and the top joint 5 are joined. Both members are joined by a fixing metal fitting 25 such as a bolt penetrating 8a.
[0009]
Further, at the upper end portion of the corner wood 16 formed of channel steel, the rear surface of the web 20 of the reinforcing corner wood 27 having the same cross-sectional shape as the corner wood 16 is disposed on the rear surface of the left and right corner wood 16 from the upper end of the corner wood 16. Each member is joined by the fixing metal fitting 25 which is in contact with the protruding joining plate 28 and passes through the contact portion, and the contact surface 30 of the corner wood joint metal 29 is brought into contact with the truss top joint metal 8a. The member and the bundle member 12 are joined with a fixing metal fitting 25 such as a bolt, and the bent portion 32 of the corner metal fitting 29 and the joining plate 28 of the corner wood 16 are brought into contact with each other with a fixing metal fitting 25 such as a bolt. Join.
[0010]
According to the roof structure of the first embodiment, the joining plate 28 is attached in advance to the corner wood 16 and the reinforcing corner wood 27, and the joining plate 28, the corner wood joining hardware 29, and the truss top joining hardware 8a are easy to perform on-site construction. Since the bundling member 12 is joined at the same time by the fixing bracket 25 such as a simple bolt, the construction is remarkably simplified as compared with the prior art.
[0011]
FIGS. 3 and 4 show the frame structure of the end portion of the dormitory roof according to the second embodiment. In the second embodiment, in the girder roof truss 26, the back surface of the web 20 of the reinforcing upper chord member 33 having the same cross-sectional shape as the upper chord member 5 is disposed on the back surface of the left and right upper chord members 5. The above members are joined by fixing brackets 25 such as bolts that are in contact with each other with the truss top joint metal 8a that joins between the members 5 sandwiched therebetween and that penetrate both the upper chord material 5 and the truss top joint metal 8a. Further, the back surface of the web 20 of the reinforcing lower chord material 34 having the same cross-sectional shape as that of the lower chord material 4 is brought into contact with the back surface of the web 20 of the lower chord material 4 with the joining hardware 8 connecting the lower chord material 4 interposed therebetween. Each member is joined by a fixing metal fitting 25 such as a bolt penetrating the lower chord member 4 and the truss top joint fitting 8a.
[0012]
According to the second embodiment, the upper chord member 33 for reinforcement having the same cross-sectional shape is brought into contact with the back surface of the upper chord member 5 of the girder roof truss 26 through the truss top joint fitting 8a and joined by the fixing bracket 25. Therefore, the girder roof truss 26 does not increase the cross-section of the upper chord material 5, and the girder roof truss is not subject to eccentricity through the central axis in the width direction and is reinforced in a balanced manner. Is done. Although this reinforcing structure has been described for the girder roof truss 26, the same applies to the king post roof truss.
[0013]
【The invention's effect】
As explained above, according to the first and second inventions of the present invention, in the ridge portion of the dormitory roof, the grooved steel corner tree and the reinforcing corner tree having the same cross-sectional shape as the joint metal fitting are placed in the middle. In the field work, the joining plate protruding from the upper end of each corner and the corner metal fittings are fixed with bolts, etc., and the contact surfaces of the corner metal fittings are fixed to the left and right sides of the roof truss. Since it can be attached to the side of the truss top joint hardware that joins the upper chord material and the bundle member and can be joined using bolts, etc., it is easy to connect the girder roof truss and the cornerwood and to join the field, and to increase the construction accuracy. The width can be improved and the construction time can be greatly shortened.
[0014]
According to a third aspect of the present invention, a reinforcing upper chord material having the same cross-sectional shape is joined to the back surface of the upper truss material made of a grooved steel roof truss, and the bolts are joined back to back on both sides of the truss top joint hardware. Since the upper chord material is reinforced by connecting with a fixing tool such as the above, there is no problem of an increase in the cross section of the grooved steel or eccentricity as in the conventional case, and basically the upper chord material is not changed at all. The same member is simply added, and further, it is possible to easily cope with the reinforcement simply by increasing the thickness of the metal joint as necessary.
[Brief description of the drawings]
FIG. 1 is a cross-sectional plan view showing a connection structure with a corner tree at the top of a roof truss according to a first embodiment of the present invention.
FIG. 2 is a front view indicated by an arrow A in FIG.
FIG. 3 is a cross-sectional view showing a roof truss reinforcement structure according to a second embodiment.
FIG. 4 is a cross-sectional plan view showing a connection structure with a corner tree at a roof truss top portion according to a second embodiment.
FIG. 5 is a perspective view of a first construction process when building a dormitory roof.
FIG. 6 is a perspective view of the second step in the same manner.
FIG. 7 is a front view of a girder roof truss.
[Explanation of symbols]
1 Girder 2 Girder 3 Pillar 4 Lower chord material 5 Upper chord material 6 Garter roof truss 7 Building splice 8 Joint hardware 8a Truss top joint metal 10 Drill screw 11 Top 12 Bundle member 13 Lattice material 14 Ceiling joist 15 Corner 16 Corner 17 Rafter 18 Corner wood lower chord material 19 Bolt 20 Web 21 1st contact surface 22 2nd contact surface 23 Intermediate contact surface 24 Corner wood joint metal fitting 25 Fixing metal fitting 26 Girder roof truss 27 Reinforcement corner wood 28 Joint plate 29 Corner wood joint hardware 30 Central part 31 Top portion 32 Bending portion 33 Upper chord material for reinforcement 34 Lower chord material for reinforcement

Claims (3)

It is a roof structure where a dormitory is constructed by a triangular girder roof truss composed of lower chord material and upper chord material, corner girders, eaves girders, and rafters erected on them, located at the end of the wife In addition, at the top of the girder roof truss formed of channel steel, a truss top joint metal that joins between the left and right upper chord members is brought into contact with the back surfaces of the left and right upper chord members, and the upper chord member and the truss Both members are joined by a fixing metal fitting that penetrates the top fitting, and on the other hand, at the end of a corner formed of channel steel, on the back of the left and right corner wood, the back of the reinforcing corner wood having the same cross-sectional shape as the corner wood Are arranged with a joining plate sandwiched so that one end thereof protrudes from the end of the corner, and each member is joined by a fixing metal fitting penetrating the abutting portion, and the central portion of the corner joining hardware is connected to the truss. Both parts in contact with top joint hardware Roof construction of a building which is bonded between a fixed bracket, and wherein the configuration of the joint plate protruding from the Sumiki end of the the bent portion of the bonding hardware Sumiki joined in contact with both members fixing bracket. 2. The roof structure of a building according to claim 1, wherein instead of the corner wood, an upper chord material of a corner wood truss having the same cross-sectional shape as the corner wood is joined to the truss top joint hardware by the same joining structure as the corner wood. A roof structure constructed of a triangular roof truss composed of lower chord material and upper chord material, corner trees, eaves girders, and rafters erected on these, located at the end in the direction of the end of the wife. At the top of the roof truss formed by A roof structure of a building, which is in contact with a metal object, and the members are joined together by a fixture that passes through the contact portion.

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