JPH09296516A - Cylindrical or angular frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate manufacture and reduce cost by making normal joint plates of simple shape usable as joint plates arranged at a ridge part and a side beam part of a roof truss, and making upper and lower joint plates in a double layer truss the same size. SOLUTION: Bent inclined parts 4b with the same inclination as the inclined face of a ridge part or a side beam part are formed at a vertical pair of joint plates 4 arranged at joint parts of the ridge part and side beam part of a roof truss of a cylindrical or angular frame. Torsional deformation is previously imparted to oblique truss main members 3-1, 3-2 to be jointed to the bent inclined parts 45 so as to make joint end parts of upper and lower parallel flanges 3a, 3a coincide with a vertical pair of joint plates 4, 4 and to make the overlap faces of the bent inclined parts 4b and splice plates 5 of the oblique truss main members 3-1, 3-2 the same face. In addition, the center of the lower stage joint plate 4-2 of the double layer truss is made coincide with the intersection point position of the lower stage oblique truss main member 3-2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical or mountain frame structure applied to a single-layer or multi-layer roof truss such as a gymnasium or a factory.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a roof truss 1 having a mountain shape or a substantially cylindrical shape formed by a multi-layer truss, and the mountain frame structure of FIG. Three planographic trusses are joined to each other in a chevron shape, and the substantially cylindrical frame structure of FIG. 3B is constructed by joining a plurality of planographic trusses along an arc to join them around the center of the building.

In any case, the roof truss 1 is shown in FIG.
As shown in FIG. 4, a horizontal truss main material 2 arranged in parallel to the ridge direction, an oblique truss main material 3 arranged obliquely with respect to the ridge direction, and truss main materials 2 at the nodes. A joint plate 4 for bolt-joining 3 with a splice plate 5
And a lattice member 6 connecting the upper and lower truss main members 2 and 3,
It is composed of a bundle 7 for connecting the upper and lower joining plates 4.

In such a roof truss 1, when H-section steels having upper and lower chord members of the truss main members 2 and 3 having upper and lower parallel flanges are used, in the ridge portion A and the side beam portion B, The joining plate 4 joined to the diagonal cross truss main member 3 (both the upper chord member 3-1 and the lower chord member 3-2 in the case of a multi-layer truss) is joined to the upper chord member 3-1 and the lower chord member 3-1. There is a drawback in that the size of the material bonded to the material 3-2 is extremely different, and the size of the material bonded to the lower chord material 3-2 is very large.

That is, the attraction point (intersection point) of the upper chord member 3-1 and the lower chord member 3-2 forming the diagonal truss main member 3 and the wife truss 9 (see FIG. 3) in the ridge A of the mountain frame of FIG. In the ridge A, the structure of is determined at a position perpendicular to the roof slope, and as shown in FIG. 4 (a), the oblique truss main member 3 is the attraction point of the lower chord member 3-2 at the center of the ridge. Are aligned with the position of the attraction point of the upper chord member 3-1 and, in the joint plate 4, the left and right joint portions of the pair of upper and lower joint plates 4-1 and 4-2 attached to the upper chord member and the lower chord member respectively are connected to the roof. Bend along the sloped surface and bend the slope 4
b, 4b are formed, and the upper chord member 3 of the diagonal truss main member 3 is formed here.
-1, the ends of the lower chord member 3-2 are joined respectively,
When the roof truss is viewed from above in the vertical direction,
As shown in (a), the attraction point position in the ridge can be seen in a state where the lower chord member 3-2 is shifted outward from the upper chord member 3-1 of the diagonal truss main member 3.

The lower chord member 3-2 of the main member 3 of the diagonal truss 3 which is joined to the center of the ridge thus formed has an interval between its attachment points, and the joining plate 4-2 in the lower stage becomes very large.

The tendency is that the larger the roof inclination angle, the greater the distance between the attachment points, and when the axial force from the oblique truss main material 3 is large, the horizontal truss main material 2 of the ridge is In some cases, bending stress is applied to.

Further, as shown in FIG. 6, when the roof truss is viewed from above in the vertical direction, the upper chord member 3-1 and the lower chord member 3-2 of the ridge are constructed.
When the attracting points of No. 2 are matched, as shown in the Haha section and the Nini section of FIG. 6, twisting occurs in the attachment state of the upper chord member 3-1 and the lower chord member 3-2 of the diagonal truss main member 3, respectively. Will be done.

That is, the upper chord member 3 forming the diagonal truss main member 3 and the wife truss 9 in the ridge A of the mountain frame structure of FIG.
1 and the lower chord member 3-2, the construction of the attraction points is such that, in the ridge A, the diagonal truss main member 3 is the same as the upper chord member 3-1 and the lower chord member 3-2 when the roof truss is viewed from the vertical direction. In this case, as shown in FIG. 6A, when the roof truss is viewed from the direction perpendicular to the inclined surface, the attraction point of the lower chord member 3-2 of the diagonal truss main member 3 is the upper chord member 3-1. Of the lower chord member 3-2 is twisted on the ridge side joint end side of the lower chord member 3-2, and the lower chord member and the lattice member integrally join the upper chord member 3-1. Twisting will occur in the same way on the side.

When such twisting occurs in the upper chord member 3-1 and the lower chord member 3-2, the joint plates 4-1 and 4-2 to which the upper chord member 3-1 and the lower chord member 3-2 are attached are bent. Since it is necessary to form a bent portion (hatched portion in FIG. 6A) corresponding to the twist in the inclined portions 4b, 4b, the structure of the joint plate at the center of the ridge is complicated and time-consuming to manufacture, which is a high technique. Is required, and workability deteriorates accordingly. Also,
It is necessary to form a bent portion in the lattice material that connects the upper chord material and the lower chord material.

The above is the case of the multi-layer truss,
Also in the case of a single-layer truss, if H-shaped steel having parallel flanges is used as the main material of the diagonal truss, twisting will occur in the main material of the diagonal truss of the ridge and side beams. That is, in this case, when the main material of the diagonal truss is viewed from above in the vertical direction, H
When the pair of upper and lower parallel flanges of the shaped steel are displaced, the joint ends of the parallel flanges do not match up and down, and when the joint ends are attached to the pair of upper and lower joint plates of the ridge so that the joint ends are vertically aligned, twisting will occur. Will occur. Further, in order to eliminate this twist, if the shape of the joining plate is determined in accordance with the pair of upper and lower parallel flanges of the H-shaped steel which are vertically displaced, the shape becomes complicated and difficult to manufacture.

The present invention has been developed in view of the above circumstances, and does not require a bent portion for each joint or a special shape in the joint plate arranged on the ridge and side beams of the roof truss. It is possible to use a normal simple shape joint plate, and it is not necessary to make a bent part of the conventional complicated shape on the upper and lower joint plates in the multi-layer truss,
It is an object of the present invention to provide a cylindrical or mountain-shaped frame whose size can be the same.

[0013]

In order to achieve the above object, in the present invention, as shown in FIG. 1 (a), a truss main material forming an upper chord member and a lower chord member is connected to a joining plate via a splice plate. The ridge of the roof truss of the cylindrical or mountain frame made by bolts and the joint plate placed at the nodal point of the side beam, and the horizontal part where the horizontal truss main material parallel to the ridge is joined, Oblique diagonal to the ridge direction The main member of the truss is joined to the ridge or the side beam to form a bent slope that has the same slope as the sloped surface. The truss main material is preliminarily twisted and deformed so that the bent inclined portion and the surface where the splice plate of the diagonal truss main material overlaps are flush with each other.

In the case of a single-layer truss in the ridge part or the side beam part, the joint positions of the parallel flanges of the diagonal truss main material to the pair of upper and lower joint plates are displaced, but in the present invention, the diagonal truss main material is pre-twisted. Since the deformation is given,
As shown in (a), the upper and lower joining positions are the same, and the surface where the bent inclined portion and the splice plate of the diagonal truss main material overlap is the same surface. It can be used, and a splice plate can be spliced and bolted easily and reliably.

Further, as shown in FIG. 1 (a), in the case of the ridge A of the mountain frame, the diagonal truss main member 3 and the wife truss 9 are provided.
The upper and lower chord members that form the roof are aligned so that the attraction points of the upper and lower chord members match when viewed from above in the vertical direction. Figure 1
In (a), the lower diagonal cross truss main material is displaced inside the upper diagonal cross truss main material.

As shown in FIG. 4 (a), when the roof truss is viewed from the direction orthogonal to the inclined surface, the main members of the diagonal trusses of the upper and lower stages overlap each other, as shown in FIG. 5 (b). ,
In the ridge A, since the lower diagonal cross truss main material is located outside the upper tier, it is necessary to make the lower joining plate large. However, in the present invention, as shown in FIG. When viewed from above in the vertical direction, in the ridge, the upper and lower tiers of the diagonal truss main material have their joining plate side tips aligned,
The sizes of the upper and lower joining plates can be the same.

Further, in the multi-layer truss, when the attracting points of the upper chord member 3-1 and the lower chord member 3-2 of the ridge A are made to coincide with each other as viewed from above in the vertical direction as shown in FIG. As shown in FIG. 1A, the upper chord member 3-1 and the lower chord member 3-2 are twisted. However, in the present invention, since the twisted truss main member is preliminarily twisted and deformed, as shown in FIG. In addition, the surface where the bent inclined portion and the splice plate of the main material of the diagonal truss overlap are the same surface, and it is not necessary to form a bent portion having a complicated shape for each connecting portion in the connecting plate as in the conventional case.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. This is an example applied to a mountain-shaped roof truss formed of a multi-layer truss. 1 and 2,
An example applied to the ridge A is shown. The roof truss 1 includes a horizontal truss main member 2, an oblique truss main member 3, a joint plate 4, a splice plate 5, and a lattice member 6 as in the conventional case.
And a bundle 7 and the like.

In FIG. 1, the joint plate 4 arranged in the ridge portion A is a hexagon that is long in the ridge direction in a plan view of the roof truss seen from the vertical direction, and the horizontal truss main member 2 parallel to the ridge direction is The horizontal portion 4a bolted to the splice plate 5 and the left and right diagonal truss main members 3 bent to the horizontal portion 4a and oblique to the ridge direction are bolted to each other via the splice plate 5 A pair of bent slopes 4b
Consists of The angle of inclination of the bent inclined portion 4b is matched with the inclined surface of the roof.

Such a joint plate 4 is composed of the upper and lower parallel flanges 3a, 3a of the diagonal truss main member 3 made of H-shaped steel.
The upper and lower joining plates 4 and 4 are connected to each other by a web 8 so as to coincide with each other. Further, in order to form a multi-layer truss, the pair of upper and lower joining plates 4 and 4 connected by the web 8 are connected to the upper chord member 3-1 and the lower chord member 3-.
The upper and lower joining plates 4-1 and 4-2 are connected to each other by the bundle 7, which are arranged in two upper and lower positions.

As shown in FIG. 2, the diagonal truss main material 3 bolted to the above-mentioned joining plate 4 through the splice plate 5 is rotated around the material axis while the parallel flanges 3a and 3a are kept parallel to each other. It is twisted and deformed and processed in advance, and the bent inclined portions 4b of the pair of upper and lower joining plates 4 and 4,
When assembled to 4b, the tips of the parallel flanges 3a, 3a are vertically aligned, and the surfaces on which the bent inclined portions 4b, 4b and the splice plate 5 of the parallel flanges 3a, 3a are affixed are the same surface. To This twisting deformation can be performed by cold or hot working, and the upper flange gradually shifts from the lower flange from the base end on the joining plate 4'side of the intermediate portion toward the tip. The upper and lower diagonal truss main members 3-1 and 3-2 are similarly twisted and deformed.

The web 3b of the diagonal truss main member 3 is also inclined with this twisting deformation (see FIG. 2B).
The web 8 of the joining plate 4 corresponding to the web 3b also needs to be inclined in accordance with the inclination of the web 3b.

In the above structure, the oblique truss main material 3 to be joined to the joining plate 4 of the ridge A is preliminarily twisted and deformed, and the oblique truss main material 3 is joined to the joining plate 4.
And the joint plate 4 ′, the joint positions of the parallel flanges 3 a, 3 a of the oblique truss main member 3 with respect to the bent inclined portions 4 b, 4 b of the pair of upper and lower joint plates 4, 4 are aligned vertically. These splice plate attachment surfaces are the same surface, and the upper chord member and the lower chord member can be easily and reliably bolted to the pair of upper and lower joint plates 4 and 4 and the parallel flanges 3a and 3a of the diagonal truss main member 3. it can.

Further, when viewed from a direction orthogonal to the inclined surface of the roof of FIG. 1 (a), the upper diagonal cross truss main material 3-1 is lower than the lower diagonal cross truss main material 3-2. Are arranged so that they are displaced inward (twisted position). That is, FIG.
When the roof truss of (c) is viewed from above in the vertical direction, the center position of the lower joining plate 4-2 and the intersection of the lower diagonal cross truss main material 3-2 are aligned, and the upper diagonal cross truss main material 3 is formed. −
1 and the end of the lower diagonal cross truss main material 3-2 on the ridge side overlap. As a result, the upper joining plate 4-1
The lower joining plate 4-2 can have the same size.

When the roof truss of FIG. 1 (a) is viewed from the direction perpendicular to the inclined surface, the lower chord member 3 of the diagonal truss main member 3 is also seen.
Since the attraction point of -2 is displaced from the position of the attraction point of the upper chord member 3-1 to the inside, as it is, the joining end side of the upper chord member 3-1 and the lower chord member 3-2 on the ridge side is maintained. Although twisting occurs, in the present invention, since the upper chord member 3-1 and the lower chord member 3-2 are twisted and deformed in advance, the upper chord member 3
-1 and lower chord member 3-2 and upper and lower two-stage joining plate 4-
The splice plate abutting surfaces of 1 and 4-2 can be made to be the same surface, and the joining plates 4-1 and 4-2 can be made into an ordinary simple shape.

Although the ridge A in the mountain frame has been described above, the same applies to the side beam B and the cylindrical frame. In the side beam portion B, a joint inclined surface 4a is formed on the ridge side of the joint plate 4, and the oblique truss member 3 joined to the joint inclined surface 4a is twisted and deformed. Further, in the cylindrical frame structure, the roof surfaces are joined to each other at an angle even in the middle part, but since the angle is small, the present invention may be applied to the ridge part and the side beam part in this case as well.

Although the truss main material is H-section steel in the above embodiments, it is not limited to this.
It goes without saying that a section steel such as a T section steel or an angle section steel is used. Furthermore, the above shows the case of multi-layer truss,
It goes without saying that it can also be applied to a single-layer truss.

[0028]

Since the present invention has the above configuration, the following effects can be obtained.

(1) A bent slope is formed in a joint plate arranged at a node of a ridge and a side beam of a roof truss of a cylindrical or mountain frame, and an oblique intersection joined to the bent slope. Since the truss main material is preliminarily twisted and deformed so that the surface where the bent inclined portion and the splice plate of the oblique truss main material overlap are the same surface, in the single-layer truss, the pair of upper and lower joining plates The joint positions of the parallel flanges of the main material of the diagonal truss can be matched at the top and bottom, and a normal simple joint plate can be used without making the bent portion for each joint a special shape. The manufacturing becomes easy, and the cost can be reduced. In addition, the bolt connection by the splice plate can be easily and surely performed.

(2) The joint plates of the upper chord member and the lower chord member are made the same by making the center of the lower joint plate of the ridge and side beams of the multi-layer truss coincide with the intersection point of the lower diagonal truss main material. Since the upper chord member and the lower chord member can be preliminarily twisted and deformed to make the bent inclined portion and the surface where the splice plate of the main material of the cross truss overlap, the same surface, Since it is not necessary to form a bent portion having a complicated shape on the joining plate, manufacturing is facilitated and cost can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration of a roof ridge in a mountain frame structure according to the present invention, (a) is a plan view seen from a direction orthogonal to an inclined surface of the roof, and (b) is a front view.

FIG. 2 (a) is a plan view of the upper chord member when the chevron frame of FIG. 1 is viewed from above in the vertical direction, (b) is a cross-sectional view of the diagonal truss main member of the ridge part according to the present invention, (c) 2] is a schematic plan view of the upper chord member and the lower chord member when the mountain frame of FIG. 1 is viewed from above in the vertical direction.

FIG. 3 is an example of a roof truss to which the present invention is applied,
(A) is a perspective view of a mountain frame, (b) is a perspective view of a cylindrical frame.

FIG. 4 is a configuration of a roof ridge portion in a conventional mountain frame structure, (a) is a plan view seen from a direction orthogonal to an inclined surface of the roof, and (b) is a front view.

5A is a plan view of the chevron frame of FIG. 4 seen from above in the vertical direction, and FIG. 5B is a schematic plan view of the upper chord member and the lower chord member of the chevron frame shown in FIG. 4 seen from above in the vertical direction. Is.

FIG. 6 is a configuration of a roof ridge when the attraction points of the upper chord member and the lower chord member are aligned when viewed from above in the vertical direction in the conventional mountain frame structure of FIG. 4, and FIG. Is a plan view seen from a direction orthogonal to each other, and (b) is a front view.

[Explanation of symbols]

 1 ... Roof truss 2 ... Horizontal truss main material 3 ... Oblique truss main material 3a ... Parallel flange 3b ... Web 4 ... Joining plate 4a ... Horizontal part 4b ... Bending inclined part 5 ... Splice plate 6 ... Lattice material 7 ... Bundle material 8 ... Web 9 ... Wife truss

Claims (2)

[Claims] 1. A ridge part of a roof truss of a cylindrical or mountain frame structure in which a truss main material is bolted to a joint plate via a splice plate, and a joint plate arranged at a node part of a side beam part. A horizontal slope to which the horizontal truss main material parallel to the direction is joined and a diagonal cross truss main material that is oblique to the ridge direction are joined to have the same slope as the ridge or side beam slope. The twisted truss main material that is joined to this bent inclined portion is pre-twisted and deformed so that the bent inclined portion and the splice plate of the crossed truss main material are flush with each other. A cylindrical or chevron frame characterized by being constructed. 2. The cylindrical or mountain frame structure according to claim 1, wherein the center of the lower joining plate in the ridge and side beams of the multi-layer truss and the intersection of the lower diagonal truss main members are aligned. Cylindrical or chevron frame, which is characterized by