JP6931558B2 - Roof frame - Google Patents

Description

The present invention relates to a roof frame .

Conventional beam materials whose structural members are all made of steel or concrete are heavy and unattractive. Therefore, in recent years, the beam material may be composed of wooden structural members from the viewpoint of design and weight reduction. For example, Patent Document 1 and Patent Document 2 disclose a structure in which the upper chord material constituting the beam material is made of wood.

Japanese Unexamined Patent Publication No. 2004-143838 Japanese Unexamined Patent Publication No. 10-373882

However, as disclosed in Patent Document 1 and Patent Document 2, when the upper chord material constituting the beam material is made of wood, the strength of the beam material is insufficient and the upper chord material may be laterally buckled.

In view of the above facts, an object of the present invention is to provide a beam material having high design and capable of suppressing lateral buckling of the upper chord material.

The beam member according to the first aspect includes a steel-framed upper chord member whose both ends are supported by a pillar member, a lower chord member provided below the upper chord member and supported by the pillar member, the upper chord member, and the above. It has a connecting member for connecting the lower chord member and a wooden stiffener provided on the upper chord member to suppress lateral buckling of the upper chord member.

According to the above configuration, by using a wooden stiffener for suppressing the lateral buckling of the steel-framed upper chord member, it is possible to enhance the design while suppressing the lateral buckling of the upper chord member.

The beam material according to the second aspect is the beam material according to the first aspect, and the stiffener is a wooden ceiling material fixed between the adjacent upper chord members.

According to the above configuration, the number of parts can be reduced by using the wooden ceiling material as a stiffener for suppressing lateral buckling of the upper chord material. Moreover, since the ceiling material is made of wood, the design can be enhanced.

The beam material according to the third aspect is the beam material according to the first aspect or the second aspect, the upper chord material is T-shaped steel, and the stiffeners arranged on both sides of the web of the upper chord material are , Connected with a through bolt penetrating the web.

According to the above configuration, the upper chord member made of T-shaped steel and the stiffeners arranged on both sides of the web of the upper chord member are connected by through bolts penetrating the web. Therefore, the upper chord member can be sandwiched and held by the stiffener, and the lateral buckling of the upper chord member can be further suppressed.

According to the present invention, it is possible to provide a beam material having a high design property and capable of suppressing lateral buckling of the upper chord material.

It is a perspective view which shows the state which fixed the ceiling material between the upper chord beams of the beam material in 1st Embodiment. It is a perspective view which shows the state before fixing the ceiling material between the upper chord beams of the beam material in 1st Embodiment. FIG. 5 is a cross-sectional view taken along the line AA in FIG. It is sectional drawing corresponding to FIG. 3 which shows the beam material in 2nd Embodiment.

<First Embodiment>
Hereinafter, the beam material according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

(composition)
As shown in FIGS. 1 and 2, the beam member 10 of the present embodiment includes an upper chord member 12, a lower chord member 14, a plurality of connecting members 16 erected between the upper chord member 12 and the lower chord member 14, and a plurality of connecting members 16. Both ends of the upper chord member 12 and the lower chord member 14 are supported by the pillar member 18, respectively. Further, the roof frame 20 is composed of a plurality of beam members 10 arranged in parallel.

As shown in FIG. 3, the upper chord member 12 is made of T-shaped steel (cut T) having a T-shaped cross section. On the other hand, the lower chord member 14 is made of a tension member such as a tension rod, and as shown in FIGS. 1 and 2, the lower chord member 14 extends in the same direction as the upper chord member 12 below the upper chord member 12. Further, a plurality of connecting plates 22 are attached to the lower chord member 14 at intervals in the length direction.

The connecting member 16 is made of, for example, a round bar made of steel, and its lower end is joined to the connecting plate 22 of the lower chord member 14. The upper end portion of the connecting member 16 extends obliquely upward from the connecting plate 22 and is joined to the lower surface of the upper chord member 12, and the upper chord member 12 and the lower chord member 14 are connected to each other by the connecting member 16.

Further, as shown in FIG. 1, a ceiling member 24 as a stiffener is fixed between the upper chord members 12 of the adjacent beam members 10. The ceiling material 24 is a wooden rectangular plate-shaped member, and specifically, is an orthogonal laminated lumber (CLT, Cross Laminated Timber) made of a plurality of lamina materials laminated and bonded so that the fiber directions are orthogonal to each other. It is configured. The ceiling material 24 may be made of a veneer laminated material (LVL, Laminated Veneer Lumber) that is laminated and bonded so that the fiber directions are aligned.

As shown in FIG. 3, the ceiling material 24 is arranged on both sides of the web 12A of the upper chord member 12, and the web 12A of the upper chord member 12 and one end of the pair of ceiling members 24 are connected to each other by a penetrating bolt 26. Has been done.

Specifically, the ceiling material 24 is formed with a recess 28 that opens on the upper surface and an insertion hole 30 that horizontally penetrates the recess 28 and one end surface of the ceiling material 24. On the other hand, the web 12A of the upper chord member 12 is formed with a through hole 32 that penetrates the web 12A in the thickness direction.

Further, the through bolt 26 is inserted into the insertion hole 30 of the ceiling material 24 and the through hole 32 of the web 12A, penetrates the washer 25 in contact with the wall surface of the recess 28, and is fastened with the nut 34. As a result, the ceiling member 24 is attracted so as to sandwich the web 12A of the upper chord member 12 from both sides. Of the pair of ceiling materials 24, one of the ceiling materials 24 (on the right side in FIG. 3) is formed with an escape groove 35 extending from the recess 28 in the direction opposite to the insertion hole 30.

Further, a plurality of fixing plates 38 extending in a direction orthogonal to the web 12A and having bolt holes 36 formed at the upper ends are joined to both sides of the web 12A of the upper chord member 12. The fixing plate 38 is a member for fixing the roof support member 42 that supports the roof material 40, and is provided so as to avoid the ceiling material 24 and to be spaced apart from each other in the length direction of the upper chord member 12.

The roof support member 42 is made of, for example, H-shaped steel, is arranged on the ceiling member 24 at intervals with respect to the ceiling member 24, and extends in a direction orthogonal to the upper chord member 12. Further, a bolt hole 44 is formed at one end of the web 42A of the roof support member 42, and the fixing plate is formed by the bolt hole 44 of the roof support member 42 and the bolt 46 inserted into the bolt hole 36 of the fixing plate 38. One end of the roof support member 42 is fixed to 38, respectively.

The roofing material 40 is, for example, a corrugated folded plate roof, and is placed on the upper part of the roof supporting member 42. The roofing material 40 is not limited to a folded plate roof, and may be a tiled roof, a roof made of a tarpaulin, or the like.

(How to build a roof frame)
When constructing the roof frame 20 using the beam member 10 of the present embodiment, first, the upper chord member 12, the lower chord member 14, and the connecting member 16 of the beam member 10 are pre-assembled as a unit on the ground. Then, as shown in FIG. 2, a plurality of beam members 10 are lifted and erected on the column members 18, respectively.

Next, as shown in FIG. 1, the ceiling member 24 is arranged between the upper chord members 12 of the beam member 10. Specifically, as shown in FIG. 3, ceiling members 24 are arranged on both sides of the web 12A of the upper chord member 12. At this time, the through bolt 26 is inserted in advance into the relief groove 35 formed in the ceiling material 24 on one side (right side in FIG. 3).

Then, the through bolt 26 is moved from the inside of the escape groove 35 to the inside of the insertion hole 30 through the recess 28, and the through bolt 26 is inserted into the insertion hole 30 of the pair of ceiling materials 24 and the through hole 32 of the web 12A. After that, in the recess 28, nuts 34 are fastened to both ends of the through bolts 26 that penetrate the washer 25. After fastening the nut 34, the recess 28 is closed with a filler 48 such as grout.

By the above steps, the roof frame 20 shown in FIG. 1 can be constructed. After that, the roof support member 42 and the roof material 40 shown in FIG. 3 are arranged on the upper part of the roof frame 20. The above procedure is an example, and the order may change.

(Action, effect)
According to the present embodiment, in the beam member 10 having the upper chord member 12, the lower chord member 14, and the connecting member 16, wooden ceiling members 24 are fixed on both sides of the web 12A of the steel-framed upper chord member 12. Therefore, by sandwiching and holding the upper chord member 12 by the ceiling material 24, the lateral buckling of the upper chord member 12 can be suppressed, and compared with the configuration in which the upper chord member 12 is stiffened with concrete or a steel frame, The weight of the beam material 10 can be reduced.

Further, by using the ceiling material 24 as the stiffener of the upper chord member 12, the number of parts can be reduced as compared with the configuration in which the ceiling material is provided separately from the stiffener. Further, since the ceiling material 24 is made of wood, it is possible to enhance the design when looking up from below.

In particular, in the present embodiment, since the ceiling material 24 is made of orthogonal laminated lumber, it is possible to bear the force in two directions (horizontal direction and front-rear direction in FIG. 3) orthogonal to each other by the ceiling material 24. Therefore, the shearing force, the compressive force, the long-term bending, and the like applied to the upper chord member 12 at the time of an earthquake can be efficiently borne by the ceiling member 24, and the lateral buckling of the upper chord member 12 can be further suppressed.

Further, according to the present embodiment, the upper chord member 12, the lower chord member 14, and the connecting member 16 of the beam member 10 are assembled in advance as a unit on the ground, and then lifted and erected on the pillar member 18. Therefore, as compared with the configuration in which the upper chord member 12 and the lower chord member 14 are erected on the pillar member 18, the work in a high place can be reduced and the work efficiency can be improved.

<Second Embodiment>
Hereinafter, the beam material according to the second embodiment of the present invention will be described with reference to FIG. The illustration and description of the same configuration as that of the first embodiment will be omitted.

(composition)
Similar to the first embodiment, the beam member 50 of the present embodiment shown in FIG. 4 is erected between the upper chord member 52 made of T-shaped steel, the lower chord member (not shown), and the upper chord member 52 and the lower chord member. It is a stretched chord beam having a connecting member 54, and the roof frame 82 is composed of a plurality of beam members 50.

Further, wooden square timbers 56 as stiffeners extending in the same direction as the upper chord member 12 are arranged on both sides of the web 52A of the upper chord member 52 of the beam member 50. The square lumber 56 is preferably made of orthogonal laminated lumber, like the ceiling lumber 24 of the first embodiment.

An insertion hole 58 is formed in the square lumber 56, a through hole 60 is formed in the web 52A of the upper chord member 52, and the through hole 60 is inserted into the insertion hole 58 of the square lumber 56 and the through hole 60 of the web 52A. A pair of square timbers 56 are fixed to both sides of the upper chord member 52 by the through bolts 64 to which the above chord members 52 are fastened.

Further, a plurality of small beams 66 are joined to the square lumber 56, respectively. The beam 66 is provided at intervals in the length direction of the upper chord member 52, and extends in a direction orthogonal to the upper chord member 52. The beam 66 is preferably made of orthogonal laminated lumber, like the square lumber 56.

Further, a wooden plywood 68 as a ceiling material is attached to the lower surface of the beam 66. Further, on both sides of the web 52A of the upper chord member 52, a plurality of fixing plates 70 extending in a direction orthogonal to the web 52A and provided at intervals in the length direction of the upper chord member 52 are joined. ..

A bolt hole 72 is formed in the fixing plate 70, and as in the first embodiment, the bolt hole 76 formed in the roof support member 74 and the bolt 78 inserted into the bolt hole 72 of the fixing plate 70 are used. , One end of the roof support member 74 is fixed to the fixing plate 70, respectively. As in the first embodiment, the roofing material 80 made of a folded plate roof is placed on the upper part of the roof supporting member 74.

(How to build a roof frame)
When the roof frame 82 is constructed using the beam member 50 of the present embodiment, the upper chord member 52, the lower chord member, and the connecting member 54 of the beam member 50 are pre-assembled as a unit on the ground as in the first embodiment. Place each on a pillar material (not shown).

Next, the square timbers 56 are arranged on both sides of the web 52A of the upper chord member 52 of the beam member 50, and the through bolts 64 are inserted into the insertion holes 58 of the pair of square timbers 56 and the through holes 60 of the web 52A. After that, the square lumber 56 is fixed to the upper chord member 52 by fastening the nuts 62 to both ends of the through bolt 64. The roof frame 82 can be constructed by the above steps.

After that, the beam 66 is joined to the square lumber 56 with a bolt or the like (not shown), and the plywood 68 is attached to the lower surface of the beam 66. Further, the roof support member 74 and the roof material 80 are arranged on the upper part of the roof frame 82.

(Action, effect)
According to this embodiment, wooden square timbers 56 are fixed to both sides of the web 52A of the upper chord member 52 of the beam member 50. Therefore, as in the first embodiment, the upper chord member 52 can be sandwiched and held by the square lumber 56, and the lateral buckling of the upper chord member 52 can be suppressed.

Further, the square lumber 56 as a stiffener, the plywood 68 as a ceiling material, and the beam 66 supporting the plywood 68 are each made of wood. Therefore, the weight of the beam member 50 and the roof frame 82 can be reduced as compared with the structure in which the square timber 56, the plywood 68, and the beam 66 are made of concrete or steel frame, and the weight of the beam member 50 and the roof frame 82 can be reduced when looking up from below. The design can be enhanced.

<Other Embodiments>
Although an example of the embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and various other embodiments are possible within the scope of the present invention.

For example, in the first and second embodiments, the beam members 10 and 50 are tension beams, but they may be truss beams. Further, it may be a three-dimensional stretched chord beam or a three-dimensional truss beam in which two upper chord members and one lower chord member are connected by a bundle member or a diagonal member.

Further, in the first and second embodiments, the fixing plates 38 and 70 are joined to the upper chord members 12 and 52, and the roofing materials 40 and 80 and the roof supporting members 42 and 74 are fixed via the fixing plates 38 and 70. rice field. However, the fixing plates 38 and 70 and the roof support members 42 and 74 may not be provided, and the roofing materials 40 and 80 may be directly placed on the ceiling material 24 or the beam 66.

Further, the method of fixing the upper chord members 12 and 52 to the ceiling material 24 and the square lumber 56 is not limited to the above embodiment. For example, a method of bolting the ceiling material 24 and the square lumber 56 to the flanges of the upper chord members 12 and 52, or forming a locking recess in the ceiling lumber 24 and the square lumber 56 and forming a locking protrusion formed on the upper chord lumbers 12 and 52. The upper chord members 12 and 52, the ceiling material 24, and the square lumber 56 may be fixed by any method such as a method of fitting them into the locking recesses.

Further, in the first and second embodiments, the ceiling lumber 24 and the square lumber 56 as stiffeners are provided on both sides of the webs 12A and 52A of the lumbers 12 and 52, but the webs 12A of the lumbers 12 and 52 , 52A may be provided with a stiffener on at least one side. By providing the stiffener on one side of the webs 12A and 52A of the upper chord members 12 and 52, the lateral buckling of the upper chord members 12 and 52 can be suppressed as compared with the configuration in which the stiffener is not provided. ..

Further, in the first and second embodiments, T-shaped steel is used as the upper chord members 12 and 52, but H-shaped steel or the like may be used. Further, the beam members 10 and 50 of the present invention can be used not only for roof frames 20 and 82 but also for floor frames.

10, 50 Beam material 12, 52 Upper chord material 12A, 52A Web 14 Lower chord material 16, 54 Connecting material 18 Pillar material 24 Ceiling material (example of stiffener)
26, 64 Penetration bolt 56 Square lumber (example of stiffener)

Claims (3)

Steel-framed upper chords with both ends supported by pillars,
A lower chord member provided below the upper chord member and supported by the pillar member,
A connecting material that connects the upper chord member and the lower chord member,
A wooden stiffener that is attached to the web of the upper chord lumber and suppresses lateral buckling of the upper chord lumber.
Have ,
The stiffener is a plate-shaped ceiling material arranged across the webs of the adjacent upper chord members.
Roof frame . Steel-framed upper chords with both ends supported by pillars,
A lower chord member provided below the upper chord member and supported by the pillar member,
A connecting material that connects the upper chord member and the lower chord member,
A wooden square lumber as a stiffener that extends in the same direction as the upper chord member and is attached to the web of the upper chord member to suppress lateral buckling of the upper chord member.
A wooden beam that extends in a direction orthogonal to the square timber and is joined to the square timber,
A wooden and plate-shaped ceiling material attached to the lower surface of the beam,
Roof frame with. Before Symbol the stiffener that is disposed on both sides of the web of the top chord material, the are connected by through-bolts passing through the web, roof Frame according to claim 1 or 2.

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