JPH11236745A - Roof truss - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a roof truss capable of reducing on-site work, improving construction accuracy of eave ceilings, and effectively utilizing building materials. SOLUTION: It is composed of a pair of upper chord materials 2, 2, lower chord material 3, and an inner member 4 disposed in a triangular frame surrounded by the upper chord materials 2, 2 and the lower chord material 3. In a roof truss in which the lower chord material 3 is stretched between the pair of eaves girder 5 and 5 and fixed, at least one of the pair of upper chord materials 2 and 2 forms an eaves ceiling outside the eave girder 5. And a base forming material 6 for eaves ceiling below the extending portion 2a.
Are provided integrally with the extension 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof truss, and more particularly, to a roof truss capable of reducing work on site, improving construction accuracy of eave ceilings, and effectively utilizing building materials.

[0002]

2. Description of the Related Art Conventionally, an eave ceiling in a wooden building is constructed by disposing a base material under a eave and then covering the base material with a ceiling material such as a wooden material or a slate material. Had been completed. However, conventionally, since the above-mentioned base material was fixed in the work on site, much work and time were required for fixing the base material and adjusting the base surface. Also,
There was a certain limit to the eaves ceiling construction accuracy because the way of delivery at the eaves was influenced by the skills of the workers.

Further, a roof truss composed of a pair of inner members such as upper chord material, lower chord material and diagonal material is bridged at predetermined intervals between a pair of eaves girder arranged in parallel with each other to form a shed. In addition to the advantage that a large indoor space can be ensured, this method has the advantage that the on-site work can be reduced by using a roof truss manufactured in a factory or the like. However, there is still room for improvement from the viewpoint of reducing on-site work and improving construction accuracy, since the base material is fixed to the lower part of the eave and the eave ceiling is formed during the on-site work. Was to leave. Furthermore, the conventional method has room for improvement from the viewpoint of effective utilization of building materials.

[0004] Accordingly, an object of the present invention is to provide a roof truss capable of reducing the on-site work, improving the construction accuracy of the eave ceiling, and effectively utilizing building materials.

[0005]

According to a first aspect of the present invention, there is provided a pair of upper chords, a lower chord, and a diagonal member disposed in a triangular frame surrounded by the upper chord and the lower chord. In the roof truss comprising the inner members such as the above, and the lower chord material is laid between a pair of eaves girder, and at least one of the pair of upper chord materials, the eave ceiling portion is provided outside the eave girder. The roof truss is provided, wherein the base forming material for the eaves ceiling is disposed integrally with the extension below the extension. Thereby, the above object has been achieved.

According to a second aspect of the present invention, the base forming material is horizontally disposed below the extension, one end of which is fixed to the end of the upper chord, and the other end of which is fixed to the upper chord. The object is achieved by providing the roof truss according to claim 1, wherein the roof truss is fixed to the upper chord member via a connecting member.

According to a third aspect of the present invention, there is provided a roof truss according to the second aspect, wherein the connecting member is disposed in a vertical direction. It is.

According to a fourth aspect of the present invention, the base forming material is fixed to the lower surface of the extending portion while being inclined at the same angle as the upper chord material. The object has been achieved by providing a roof truss.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. Here, FIG. 1 is a front view showing a roof truss according to the first embodiment of the present invention, and FIG. 2 is a partially enlarged view of the roof truss of FIG. 1 after erection.

As shown in FIGS. 1 and 2, the roof truss 1 according to the first embodiment includes a pair of upper chords 2, 2 and a lower chord 3, a pair of upper chords 2, 2, and a lower chord 3. A roof truss comprising an inner member 4 disposed in an enclosed triangular frame body, wherein the lower chord member 3 is stretched between a pair of eaves girders 5 and 5 and fixed. I have. Each of the pair of upper chord members 2 has an extension 2a forming an eaves ceiling outside the eaves girder 5, and a base of the eaves ceiling is provided below the extension 2a. The forming material 6 is provided integrally with the extension 2a.

Hereinafter, the roof truss 1 of the first embodiment will be described in more detail. The pair of upper chords 2 and 2 in the roof truss 1 are joined to each other at the top to form a mountain shape, and are connected to each other by the lower chord 3 horizontally arranged at a position near the lower end. A plurality of diagonal members 4 are arranged in a triangular frame formed by the upper chord members 2 and 2 and the lower chord member 3 to form a truss structure that supports a roof load with the triangular basic skeleton. ing. The upper chord 2, the lower chord 3 and the inner member 4 constituting the roof truss 1 are wood materials such as wood, laminated wood and the like, respectively.
As in a conventional roof truss.

Thus, each of the pair of upper chord members 2 in the roof truss 1 of the first embodiment has an extending portion 2 a forming an eave ceiling outside the eave girder 5. Below the extension 2a, a base forming material 6 for the eave ceiling is provided integrally with the extension 2a. A pair of upper chord materials 2,
2 has a portion extending outward from the joint with the lower chord material 3. The roof truss 1 usually has the lower chord material as indicated by a virtual line (chain line) in FIG. 1. 3 are mounted on the pair of eaves girders 5 and 5 and fixed. Therefore, the extending portion 2a of the roof truss 1 is a portion extending outward from the joint with the lower chord member 3 of the upper chord member 2. The roof truss 1 may be fixed on the eaves girder 5 by directly placing the lower chords 3 on the eaves girder 5 as shown in FIG. To other members, for example,
The position of the lower chord material 3 may be fixed by interposing a raising member that raises the position upward.

The base forming material 6 includes a pair of the extended portions 2.
a, 2a, horizontally, that is, the lower chord 3
One end on the outer side of the base forming material 6 is fixed to the end of the upper chord material 2, and the other end on the inner side is disposed in the vertical direction. The upper chord material 2 is fixed via the connecting member 7. That is, the base forming material 6
Are fixed to and integrated with the extension 2a.

The joint between the base forming material 6 and the upper chord 2 and the joint with the connecting member 7 and the connecting member 7
As shown in FIG. 2, the joint portion between the upper chord member 2 and the upper chord member 2 is joined by striking a nail plate 8 having a large number of sharp projections formed on one surface so as to straddle between both members to be joined. ing. The nail plate 8 is attached to one side surface or both side surfaces of a contact portion where members to be joined are brought into contact with each other. However, it is preferable to be hit on both sides.

The base forming material 6 is a wood material like the upper chord materials 2 and 2 and the lower chord material 3 and the like, and the type of the wood material is not particularly limited, such as wood and laminated wood. Also,
The dimensions and the like of the base forming member 6 are not particularly limited as long as the base of the eave ceiling can be formed, but it is preferable that the width (width between both side surfaces) of the upper chord member 2 to be fixed is the same. When the width of the base forming material 6 is the same as the width of the upper chord material 2, when the base forming material 6 is fixed to the upper chord material 2,
The nail plate 8 can be easily hit, and firm and quick fixing is possible. Further, the connecting member 7 for fixing an inner end of the base forming material 6 to the upper chord material 2.
The material is not particularly limited, but is preferably a wood material as in the case of the base forming material 6 from the viewpoint of effective utilization of building materials, and the width thereof is also preferably the same as that of the upper chord material 2. In FIG. 2, reference numeral 12 denotes a heat insulating material disposed between the vertical waist edges arranged at predetermined intervals, and reference numeral 13 denotes a parting edge. In FIG. 2, reference numeral 14 denotes an exterior material such as a siding material and a mortar-finished lath net material.

The base forming material 6 is made of the roof truss 1
Is installed between the pair of eaves girders 5 and 5 so that an inner end thereof is disposed so as to contact a structural base material such as a rim provided on an outer wall of the building. Is preferred.
FIG. 2 shows an example in which the roof truss 1 is used in a building of an external heat insulation method, and the base forming material 6 abuts on a vertical body edge 10 which is vertically fixed to the load-bearing face material 9 on the outer surface. This is an example. Thus, the base forming material 6
If the inner end of the eaves is disposed so as to abut against the rim provided on the outer wall of the building, there is an advantage that the strength of the eaves part is reinforced.

Further, it is preferable that the outer end face of the base forming material 6 forms one plane with the end face of the upper chord material 2 as shown in FIG. If a flat surface is formed at the end in this way, it is possible to form a fixed surface such as the fascia 11 at the same time as installing the roof truss.
It is possible to further reduce on-site work.

According to the roof truss 1 of the first embodiment, the foundation of the eave ceiling is formed at the same time as the installation of the roof truss 1, so that the labor of laying the eave ceiling foundation material on site is unnecessary, and As shown in FIG.
The construction of the eave ceiling can be completed only by stretching the ceiling material 15 such as a fire-resistant decorative board with the base as a base. Further, since the base forming material 6 is integrally fixed to the roof truss 1 in a factory or the like, the dimensional accuracy is improved, and the construction accuracy of the eave ceiling can be improved. Further, the eave ceiling can be constructed without depending on the skilled person, and it is possible to cope with the problem of lack of skilled workers in recent years. Furthermore, since the base material 6 and the connecting member 7 can be made of short materials and scrap materials which are unnecessary at the truss factory, building materials can be effectively used.

FIG. 3 shows a main part of a roof truss 1 'according to a second embodiment of the present invention. The roof truss 1 'of the second embodiment shown in FIG. 3 is different from the roof truss 1 of the first embodiment in that the connecting member 7 is fixed at a right angle to the upper chord 2 and in other respects. It has the same configuration as the roof truss 1 of the first embodiment. Therefore, the same members as those of the roof truss 1 of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Also in the roof truss 1 ′ shown in FIG. 3, the extension 2a forming the eave ceiling outside the eave girder 5
Since the base forming material 6 for the eave ceiling is integrally arranged below the roof truss, the same operation and effect as those of the roof truss 1 of the first embodiment can be obtained. Since the connecting member 7 is fixed at a right angle to the upper chord 2, the eaves portion is effectively reinforced.

FIG. 4 shows a main part of a roof truss 1 "according to a third embodiment of the present invention. In the roof truss 1" according to the third embodiment shown in FIG. It is different from the roof truss of the first embodiment and the second embodiment in that it is inclined at the same angle as that of the roof truss and is fixed to the lower surface of the extension 2a. In other respects, the first embodiment and the second embodiment It has the same configuration as the roof truss of the second embodiment. Therefore, the same members as those of the roof truss 1 of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Also in the roof truss 1 ″ shown in FIG. 4, the eaves ceiling base formation material 6 is provided below the extension 2a that forms the eaves ceiling outside the eaves girder 5.
Are integrally disposed, the same operation and effect as those of the roof truss 1 of the first embodiment can be obtained. Further, the roof truss 1 ″ of the third embodiment is easy to manufacture because it is sufficient to fix the base forming material 6 to the lower surface of the extension 2a with the nail plate or the like.

Although the embodiments of the roof truss of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the spirit of the present invention. For example, the configuration of a diagonal member or the like disposed in a triangular frame formed by an upper chord material and a lower chord material in a roof truss includes a distance between a pair of the eaves girders over which the roof truss extends and a required structure. An appropriate configuration can be adopted according to the strength and the like. For example, a king post truss, a queen post truss, and the like can be used.

Further, in the roof truss of each of the above embodiments, each of the pair of upper chord members 2 has the above-mentioned extending portions 2a, and the above-mentioned base forming material 6 is disposed on both of the extending portions 2a. However, the roof truss of the present invention has a pair
2 may have the extended portion 2a, or both of the pair of upper chords 2 may have the extended portion 2a, and only the upper chord 2 may form the base. The material 6 may be provided.

As a method of fixing the base forming material 6 to the extending portion 2a of the upper chord material 2, in addition to the method using the nail plate 8, a method using a plywood gusset plate or the like is used. Various known methods can be used without particular limitation. Also, FIG.
FIG. 4 shows an example in which the roof truss according to each embodiment of the present invention is applied to a building using the outer heat insulation method. It can also be used for Further, it goes without saying that the forming material, dimensions, shape, and the like of each of the other members can be appropriately changed without departing from the spirit of the present invention.

[0024]

According to the present invention, it is possible to provide a roof truss capable of reducing on-site work, improving construction accuracy of eave ceilings, and effectively utilizing building materials.

[Brief description of the drawings]

FIG. 1 is a front view showing a roof truss according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged view of the roof truss of FIG. 1 (when it is erected).

FIG. 3 is a diagram showing a main part of a roof truss according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a main part of a roof truss according to a third embodiment of the present invention.

[Explanation of symbols]

 1, 1 ', 1 "roof truss 2 upper chord material 2a extension 3 lower chord material 4 inner member 5 eaves girder 6 base forming material 7 connecting member 8 nail plate

Claims (4)

[Claims] 1. A pair of upper chord materials, a lower chord material, and an inner member such as a diagonal member arranged in a triangular frame surrounded by the upper chord material and the lower chord material, wherein the lower chord material is a pair. In a roof truss that is fixed between the eaves girder, at least one of the pair of upper chords has an extension forming an eaves ceiling outside the eaves girder, A roof truss, wherein a base forming material for an eaves ceiling is provided integrally with the extension below the extension. 2. The base forming material is disposed horizontally below the extension, one end of which is fixed to an end of the upper chord, and the other end is connected to the upper chord. The roof truss according to claim 1, wherein the roof truss is fixed via a truss. 3. The roof truss according to claim 2, wherein the connecting member is disposed in a vertical direction. 4. The roof truss according to claim 1, wherein the base forming material is fixed to the lower surface of the extension part at a same angle as the upper chord material.