JP4823000B2 - Assembling method of truss structure - Google Patents

Description

  The present invention relates to a method for assembling a truss structure capable of easily manufacturing an arch-shaped or dome-shaped truss structure.

In Patent Document 1, a non-hollow cross-section rod-shaped member (front chord member, rear chord member, front cross member, rear cross member, one side diagonal member, the other side diagonal member) having a flat connecting portion, A truss structure is described in which the connecting portions are sequentially arranged from the rear member so as to be stacked and assembled three-dimensionally, and the connecting portions of the stacked members are fixed by rivets or the like.
In the truss structure used for the roof of the structure, the arch shape (cylindrical surface shape in which one of the chord material and the cross member is curved in an arc shape) and the dome shape (both the chord material and the cross member are curved in an arc shape) (Spherical) is advantageous from the viewpoint of strength and drainage of rainwater. It is not easy to bend the truss structure formed in a flat shape into an arch shape or a dome shape later, and it is expensive to pre-curve the chord material and cross member before assembling. Since the cross member is bent by its own weight, it is not easy to obtain an accurate curvature.
JP 2006-152754 A

  An object of the present invention is to provide a method for assembling a truss structure that can easily manufacture an arch-shaped or dome-shaped truss structure in view of the above-described circumstances.

  In order to achieve the above object, a method for assembling a truss structure according to the first aspect of the present invention includes a plurality of connecting portions with flat upper surfaces provided at intervals in the longitudinal direction. Each of the chord members having a non-hollow cross-section projecting upward and having a plurality of flat connecting portions provided at intervals in the longitudinal direction, and a step of arranging the chord members in parallel with each other at equal intervals. One side cross member with a non-hollow cross-section provided with a fastener insertion hole in the part is overlapped on the connection part of the one side chord material while inserting the fastener into the fastener insertion hole, Positioned parallel to each other in the direction orthogonal to the arrangement direction, at a regular interval, between the flat one side connecting part and the flat other side connecting part, and the one side connecting part and the other side connecting part. A zigzag shape having a plurality of straight portions, and a fastener insertion hole is provided in each connecting portion. The first diagonal member with a hollow cross section is placed on the one side cross member on the one side cross member while the fixing member is inserted through the fixing member insertion hole, and oblique to the one side chord member and the one side cross member. And a plurality of steps of arranging them in parallel at equal intervals, a flat one-side connecting portion and a flat other-side connecting portion, and a straight portion positioned between the one-side connecting portion and the other-side connecting portion. The second diagonal member having a non-hollow cross section having a zigzag shape and having a fastener insertion hole in each connecting portion is connected to one side of the first diagonal member while the fixing tool is inserted into the fixing tool insertion hole. And the other side connecting portion is overlaid on the other side connecting portion of the first diagonal member, intersects with the first diagonal member and is oblique to the one side chord material and one side cross member and equal to each other. And having a plurality of flat connecting portions spaced apart in the longitudinal direction and arranged in parallel at intervals, The other side cross member having a non-hollow cross-section provided with a fastener insertion hole in the connection portion is overlapped on the other side connection portion of the second diagonal member, and is arranged in the same direction as the arrangement direction of the one side cross member. The step of arranging in parallel at equal intervals, and the lower surface provided at intervals in the longitudinal direction has a plurality of flat connecting portions, and the fixing portion insertion hole is formed in the connecting portion and the interval between the fixing members of the one side chord material The other side chord members having a non-hollow cross-section provided at a smaller interval are overlapped on the connection portion of the other side cross member, and are equidistant from each other in the same direction as the arrangement direction of the one side chord material. Before the step of arranging the chord material in parallel and the step of arranging the chord material on the other side, the step of supporting the one side chord material by floating the intermediate portion from the floor surface, and the connecting portion of each member to be laminated are inserted through the fixing tool. And a step of fixing with a fixing tool inserted through the hole.

  The method for assembling the truss structure according to the invention described in claim 2 has a plurality of connecting portions with flat upper surfaces provided at intervals in the longitudinal direction, and a non-hollow structure in which a fixing tool protrudes upward from each connecting portion. It has a step of arranging the one side chord material of the cross section in parallel at equal intervals, and a plurality of flat connecting portions provided at intervals in the longitudinal direction, and each connecting portion is provided with a fastener insertion hole The one side cross member of the non-hollow cross section is overlapped on the connection part of the one side chord material while inserting the fixing tool through the fixing tool insertion hole, and mutually in a direction perpendicular to the arrangement direction of the one side chord material. A zigzag shape having a plurality of steps arranged in parallel at equal intervals, a flat one side connecting part and a flat other side connecting part, and a plurality of linear parts located between the one side connecting part and the other side connecting part. Then, the first diagonal member having a non-hollow cross-section provided with a fastener insertion hole in each connecting portion is fixed. While inserting the fixing tool into the tool insertion hole, overlap the one side connecting part on the connecting part of the one side cross member, and be parallel to the one side chord member and one side cross member diagonally and at equal intervals. Adhering to each connecting part in a zigzag shape having a plurality of arranging steps, a flat one side connecting part and a flat other side connecting part, and a plurality of linear parts located between the one side connecting part and the other side connecting part The second diagonal member having the non-hollow cross section provided with the tool insertion hole is overlapped on the one side connection part of the first diagonal member while the fixing tool is inserted into the fixing tool insertion hole, and the other side connection part. On the other side connecting portion of the first diagonal member, crossing the first diagonal member, and obliquely with respect to the one side chord member and the one side cross member and arranged in parallel at equal intervals; , Having a plurality of flat connecting portions provided at intervals in the longitudinal direction, and having a fastener insertion hole on one side in the connecting portion The other side cross member having a non-hollow cross section provided at an interval smaller than the interval between the fixing tool insertion holes of the material is overlapped on the other side connection portion of the second diagonal member, and the arrangement direction of the one side cross member is Before the step of arranging the parallel members at equal intervals in the same direction, and the step of arranging the other side cross member, the step of supporting the one side chord member with the intermediate part floating above the floor surface, and the longitudinal direction The other side of the non-hollow cross section in which the lower surface provided with a gap in the direction has a plurality of connecting portions that are flat, and the connecting portion is provided with fixing tool insertion holes at an interval smaller than the interval between the fixing members of the one side chord material The step of placing the chords on the other side cross member on the other side and arranging them in parallel at equal intervals in the same direction as the arrangement direction of the one side chord material, and connecting the members to be laminated And fixing the portion with a fixing tool inserted through the fixing tool insertion hole.

  The method for assembling the truss structure according to the invention described in claim 3 is the member having at least two protrusions having a flat upper surface and projecting downward in addition to the structure according to claim 1 or 2. The other side chord member is a member having a flat bottom surface and having at least two ridges protruding upward, and the one side cross member and the other side cross member are in the cross section of the connecting portion between the connecting portions. The first diagonal member and the second diagonal member are members having a bent portion in a cross section of the straight portion.

  The method for assembling the truss structure according to the first aspect of the present invention is such that the fixture is protruded upward from each connecting portion of the one side chord material, and the one side cross member and the first and second diagonal members are connected to the respective connecting portions. It is possible to assemble quickly and easily by inserting the fixing tool through the fixing tool insertion hole provided on the other side, and further, the fixing tool insertion hole on the other side chord material is larger than the interval between the one chord material fixing tools. Because it is provided at a small interval, the stringing material has a bow shape that protrudes downward by simply fixing the connecting part of each member to be laminated with the fixing tool inserted into the fixing tool insertion hole without bending the string material in advance. Therefore, it is possible to easily produce an arch-shaped truss structure with a desired curvature. In addition, each member such as a chord member is a member having a non-hollow cross section, and is more flexible than the hollow member, so that it is easy to form an arch-shaped curved surface. Prior to the step of placing the other side chord material, the one side chord material is supported downward with the intermediate portion floating above the floor surface, so that the one side chord material protrudes downward due to its own weight and the weight of the member placed thereon. The other side chord material can be easily attached and can be assembled into an arch shape without difficulty.

  In the method for assembling the truss structure according to the second aspect of the present invention, the fixture is protruded upward from each connecting portion of the one side chord member, and the one side cross member and the first and second diagonal members are connected to the respective connecting portions. As a result, the assembly can be performed quickly and easily by inserting the fixing tool into the fixing tool insertion hole provided on the other side, and the fixing tool insertion hole is provided on the other side member. The string material and the cross member are bent in advance by providing the fastener insertion holes in the other side string material at intervals smaller than the distance between the one side string material fasteners. Rather than simply fixing the connecting part of each member to be laminated with the fixing tool inserted into the fixing tool insertion hole, the string material and the cross member are naturally bent into a convex arch shape with a desired curvature, and a dome-shaped truss A structure can be easily manufactured. In addition, each member such as a chord member is a member having a non-hollow cross section, and is more flexible than the hollow member, so that it is easy to form a dome-shaped curved surface. Prior to the step of placing the other side cross member, the one side chord member is supported by floating the intermediate portion from the floor surface, so that the one side cross member and the one side chord member are self-weighted and the member disposed thereon. Since it bends downward into a convex arcuate shape due to the weight, the other side cross member and the other side chord member can be easily attached and can be assembled into a dome shape without difficulty.

  The method for assembling the truss structure according to the invention described in claim 3 has, in addition to the effects of the invention described in claim 1 or 2, at least two ridges on the one side chord material that have a flat upper surface and project downward. Since the lower chord member is a member having at least two ridges whose upper surface is flat and protrudes upward, the fixing member or the fixing member insertion hole at any position in the longitudinal direction of the upper chord member and the lower chord member Can be easily adapted to any curvature, and the upper chord material and the lower chord material can have sufficient strength. Furthermore, the one side cross member and the other side cross member are members having a bent portion in the cross section of the connecting portion between the connecting portions, and the first diagonal member and the second diagonal member have a bent portion in the cross section of the straight portion. Since it is a member, the connecting portion of the cross member and the straight portion of the diagonal member are unlikely to be bent, and the strength of the truss structure can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 4-7 illustrate one embodiment of the truss structure. This truss structure is used as a roof of a simple building such as a carport. The length L in the left-right direction is 1.8 m, the length W in the depth direction is 1.44 m, and the vertical dimension H is about 10 cm. It has become. As shown in FIG. 4B, the truss structure has an arch shape in which the central portion in the left-right direction is raised in an arc shape when viewed from the front.
As shown in FIG. 4A and FIG. 7, this truss structure is composed of an upper chord member 1, a lower chord member 2, an upper cross member 3, a lower cross member 4, a first diagonal member 5, and a second diagonal member 6. A frame is constructed by combining six types of aluminum frame members. As shown in FIGS. 5 and 6, the aluminum thin panel 30 is sandwiched between the upper chord material 1 and the upper cross member 3 on the upper surface side. Is installed on the entire surface.

  At the lowest position of the truss structure, the lower chord member 2 is arranged in parallel in the depth direction with a certain interval. On the upper surface of the lower chord material 2, a lower horizontal member 4 intersects the lower chord material 2 and is arranged in parallel at a constant interval in the left-right direction. At the uppermost position of the truss structure, the upper chord material 1 is arranged in parallel in the depth direction with a certain interval. A panel 30 is disposed immediately below the upper chord member 1, and an upper cross member 3 is disposed immediately below the panel 30 so as to cross the upper chord member 1 and to be arranged in parallel at a certain interval in the left-right direction. is there. As shown in FIG. 4 (a), the upper chord member 1 and the upper cross member 3, and the lower chord member 2 and the lower cross member 4 are arranged in a lattice shape so as to form a substantially square section 33, respectively. The material 2 is located exactly in the middle between the upper chord materials 1, and the lower cross member 4 is located exactly in the middle between the upper cross members 3. As shown in FIG. 4B, the upper chord material 1 and the lower chord material 2 are curved in a concentric circular arc shape.

  As shown in FIG. 10 (b), the first diagonal member 5 is a continuous member bent in a zigzag shape, and is inclined with respect to the chord members 1, 2 and the cross members 3, 4 at regular intervals. Are arranged in parallel to each other and connect the intersection of the upper chord member 1 and the upper cross member 3 and the cross portion of the lower chord member 2 and the lower cross member 4. The second diagonal member 6 is a zigzag continuous member similar to the first diagonal member 5, and intersects the first diagonal member 5 obliquely with respect to the chord members 1 and 2 and the horizontal members 3 and 4. They are arranged in parallel at equal intervals, and the intersection of the upper chord member 1 and the upper cross member 3 and the intersection of the lower chord member 2 and the lower cross member 4 are connected. Upper member connection portion 21 where upper chord member 1, upper cross member 3, first diagonal member 5 and second diagonal member 6 intersect, lower chord member 2, lower cross member 4, first diagonal member 5 and second diagonal member. Lower member connecting portions 22 where the material 6 intersects are fixed by rivets 20a and 20b, respectively.

  Since the upper chord material 1 and the lower chord material 2 are curved in a concentric circular arc shape, the interval B of the rivets 20b in the longitudinal direction of the lower chord material 2 is relative to the interval A of the rivets 20a in the longitudinal direction of the upper chord material 1 A little smaller.

As shown in FIG. 8, the upper chord material 1 is an extruded shape of an aluminum alloy. The upper chord material 1 has protrusions 7 and 7 protruding upward at both side edges of the upper surface, and a plate-like base 23 between the protrusions. have. Between the two ridges 7 and 7, there is a fixing space S for fixing the connecting portion of each frame member that abuts with the rivet 20 a, and a space of 15 mm is provided between the ridges 7 and 7. The thickness of the base 23 is 1.5 mm. A plurality of connecting portions 8 are provided on the flat lower surface of the upper chord member 1 at regular intervals in the longitudinal direction, and rivet insertion holes 24 are formed in the connecting portion 8 at regular intervals A. The lower chord material 2 is an extruded shape of an aluminum alloy having the same cross-sectional shape as the upper chord material 1, and the direction of the ridge 7 is reversed with respect to the upper chord material 1 so that the ridges 7, 7 protrude on the lower surface. Used. As with the upper chord material 1, the lower chord material 2 is provided with a plurality of connecting portions 9 that connect the lower cross member 4 at regular intervals in the longitudinal direction of the flat upper surface. Rivet insertion holes 24 are formed. That is, the interval B between the rivet insertion holes 24 of the lower chord material 2 is slightly smaller than the interval A between the rivet insertion holes 24 of the upper chord material 1.
The distance A between the rivet insertion holes 24 of the upper chord material 1 and the distance B between the rivet insertion holes 24 of the lower chord material 2 correspond to the curvatures of the upper chord material 1 and the lower chord material 2 after assembly, and if one is determined, the other is drawn. It is easily required. That is, as shown in FIG. 4B, an imaginary line is drawn from the middle of the rivet insertion holes 24 of the upper chord material 1 toward the center of the curved arcs of the chord materials 1 and 2, and the virtual line and the lower chord material What is necessary is just to make it the rivet penetration hole 24 of a lower chord material in the position where 2 crosses.

  The upper cross member 3 is formed from a belt-like plate having a width of 20 mm cut out from an aluminum alloy plate having a plate thickness of 1.5 mm. As shown in FIG. 9A, the upper cross member 3 is formed at regular intervals in the longitudinal direction. A plurality of flat plate-like connecting portions 10 are formed, and the connecting portion 11 between the connecting portions 10 is bent by a press machine and has a bent portion 25 as shown in FIG. 9C. It is an angle-shaped cross section. In the upper cross member 3, the upper surface of the connecting portion 11 is flush with the upper surface of the connecting portion 10, and the upper surface is flat. A rivet insertion hole 24 is formed at the center of the connecting portion 10. The lower cross member 4 is a member having the same shape as the upper cross member 3, and a strip-like plate is cut out from the aluminum alloy plate as in the case of the upper cross member 3, and is bent by a press machine leaving the connecting portion 12. Thus, a plurality of flat plate-like connecting portions 12 and a plurality of connecting portions 13 having an angle-shaped cross section are formed. The interval between the rivet insertion holes 24 in the upper cross member 3 and the interval between the rivet insertion holes 24 in the lower cross member 4 are the same.

  The first diagonal member 5 is formed from a strip-like plate having a width of 15 mm cut out from an aluminum alloy plate having a thickness of 1.5 mm. As shown in FIGS. 10A and 10B, the first diagonal member 5 has a constant longitudinal direction. Flat plate-like upper connecting portions 14 and lower connecting portions 15 are alternately formed at every interval, and each connecting portion is bent by a press machine in the same manner as the upper and lower cross members 3 and 4. As shown in FIG. 10 (c), a plurality of straight portions 16 having an angled cross section having a bent portion 25 are provided. Further, as shown in FIG. 10B, the longitudinal end of the upper connecting portion 14 is obliquely bent downward, and the longitudinal end of the lower connecting portion 15 is obliquely bent upward. It is formed in a zigzag shape. A rivet insertion hole 24 is formed at the center of the upper connecting portion 14 and the lower connecting portion 15. The second diagonal member 6 is a member having the same shape as the first diagonal member 5, and is formed by bending a strip-shaped plate cut out from an aluminum alloy plate material, thereby forming a flat plate-like upper connecting portion 17 and a lower side. A connecting portion 18 and a straight portion 19 having an angle-shaped cross section are formed. The length between the upper connecting portion 17 and the lower connecting portion 18 (the length of the straight portions 16 and 19) is also the same in the first diagonal member 5 and the second diagonal member 6.

  The panel 30 spans a plurality of sections 33, 33... Formed by the upper chord member 1 and the upper cross member 3 and is sandwiched between the upper chord member 1 and the upper cross member 3. The panel 30 is made of an aluminum alloy plate having a thickness of 1 mm. The panel 30 may be manufactured by one piece, or may be divided into a plurality of parts in the left-right direction and the depth direction of the truss structure.

Next, the procedure for assembling the truss structure using the above-described members will be described with reference to FIGS. The truss structure is arranged in order from the member located on the upper side, and is assembled upside down. First, as shown in FIG. 2 (a), the upper chord material 1 is arranged in parallel in the depth direction at a predetermined interval on the floor surface of the work place. At this time, as shown in FIG. 3, the rivet 20 a is inserted into each rivet insertion hole 24 of the upper chord material 1 from below so as not to come out, and the rivet 20 a is protruded upward from the connecting portion 8.
Next, as shown in FIG. 2B, the panel 30 is placed on the upper chord material 1.
Next, as shown in FIG. 2 (c), the connecting portion 10 is placed on the connecting portion 8 of the upper chord material 1 while the upper cross member 3 is inserted into the rivet insertion hole 24 through the rivet 20 a protruding from the upper chord material 1. In this way, the upper chord material 1 is crossed vertically and sequentially disposed.
Next, as shown in FIG. 1A, the whole is lifted to support both ends of the upper chord material 1 on the stand 34, and the intermediate portion of the upper chord material 1 is floated from the floor 35 of the work place.
Next, as shown in FIG. 2 (d), the first diagonal member 5 is placed on the connection portion 10 of the upper cross member 3 while the rivet 20 a is inserted through the rivet insertion hole 24 and the upper connection portion 14 is placed on the connection portion 10 of the upper cross member 3. The upper chord member 1 and the upper cross member 3 are sequentially arranged obliquely. As shown in FIG. 3, the first diagonal member 5 holds the rivet 20 a in advance in the rivet insertion hole 24 of the lower connection portion 15 from below so as not to come out, and holds the rivet 20 b from the lower connection portion 15. Let it protrude upward.
Next, as shown in FIG. 2 (e), the second diagonal member 6 is overlaid on the upper connecting portion 14 of the first diagonal member while the upper connecting portion 17 is inserted into the rivet insertion hole 24 and the rivet 20a is inserted. The lower connecting portion 18 is overlapped on the lower connecting portion 15 of the first diagonal member 5 while the rivet 20b is inserted into the rivet insertion hole 24, and the lower connecting portion 18 is sequentially arranged obliquely across the first diagonal member 5.
Next, as shown in FIG. 2 (f), the lower cross member 4 is placed on the lower connection portion 18 of the second diagonal member 6 while the rivet 20 b is inserted into the rivet insertion hole 24. , Arranged sequentially in the vertical direction.
Next, as shown in FIG. 2 (g), the lower chord material 2 is sequentially laterally placed so that the connecting portion 9 is placed on the connecting portion 12 of the lower cross member 4 while the rivet 20 b is inserted into the rivet insertion hole 24. Arrange. At this time, as shown in FIG. 1 (d), the upper chord material 1 is bent into a convex arch shape due to its own weight and the weight of the member placed thereon, and the pitch between the rivets 20b is slightly narrowed. Can be easily inserted into the rivet insertion hole 24 to attach the lower chord material 2. Thereafter, the tip portions of the rivets 20a and 20b are crushed, and the connecting portions of the respective members to be stacked are fixed with the rivets 20a and 20b. When assembled in this manner, the distance B between the rivet insertion holes 24 of the lower chord material 2 is made smaller than the distance A between the rivet insertion holes 24 of the upper chord material 1 so that the upper chord material 1 and the lower chord material 2 have a predetermined curvature. Bend at.

  As described above, the present truss structure has a predetermined frame while positioning the continuous frame members 1, 2, 3, 4, 5, 6 by inserting the rivets 20a, 20b into the rivet insertion holes 24. It can be easily assembled simply by arranging them in order. In addition, since the interval B between the rivet insertion holes 24 of the lower chord material 2 is made smaller than the interval A between the rivet insertion holes 24 of the upper chord material 1, the upper chord material 1 and the lower chord material 2 are simply assembled without being bent in advance. Thus, it is possible to easily and accurately manufacture an arch-shaped truss structure having an R curved surface, which naturally curves with the curvature as designed by the upper chord member 1 and the lower chord member 2. Further, each member 1, 2, 3, 4, 5, 6 is formed of a member having a non-hollow cross section, and is flexible as compared with the hollow material, so that it is easy to form an arch-shaped curved surface. In addition, by assembling the upper chord material 1 with the middle portion floating and supported, the upper chord material 1 bends downward into a convex arcuate shape due to the weight of the member, so that the arch-shaped truss structure Assembly is easier.

Further, this truss structure is lightweight because each member is made of a non-hollow cross section made of aluminum, and the upper chord member 1 and the lower chord member 2 have two ridges 7 and 7 projecting from the upper surface and the lower surface, respectively. Therefore, the upper cross member 3, the lower cross member 4, the first diagonal member 5 and the second diagonal member 6 have connecting portions 11 and 13 having straight bent portions 25 in the cross section between the connecting portions, and straight portions 16 and 19 respectively. Therefore, sufficient buckling strength can be ensured, and a high-strength truss structure can be obtained.
Further, as shown in FIG. 4 (b), the truss structure has an arched shape in which the center portion of the span is raised, so that deformation due to its own weight or a load such as wind and rain or snow accumulation can be suppressed.
Furthermore, since the panel 30 is attached between the upper chord member 1 and the upper cross member 3, the panel 30 can be attached simultaneously with the assembly of the truss structure, and the panel 30 can be attached stably. it can.

  The curvature of the upper chord material 1 and the lower chord material 2 at the time of completion can be freely set according to the intervals A and B of the rivet insertion holes 24. For example, the interval B of the rivet insertion holes 24 of the lower chord material 2 is set to the upper chord material 1 If the distance A between the rivet insertion holes 24 is made smaller, the upper chord material 1 and the lower chord material 2 are curved with a tighter curvature. The upper chord material 1 uses an extruded profile with a U-shaped cross-section with a flat bottom surface, and the lower chord material 2 uses an extruded profile with a U-shaped cross-section with a flat upper surface. 2 can be provided with a rivet insertion hole 24 at an arbitrary position in the longitudinal direction to form the connecting portions 8 and 9, and can correspond to an arbitrary curvature.

  If the interval between the rivet insertion holes 24 in the lower cross member 4 is smaller than the interval between the rivet insertion holes 24 in the upper cross member 3, the upper cross member 3 and the lower cross member 4 are circular as in the upper chord member 1 and the lower chord member 2. It can be curved in an arc. In addition to curving the upper chord member 1 and the lower chord member 2, the upper cross member 3 and the lower cross member 4 are also bent, so that a dome-shaped truss structure curved in a spherical shape can be easily manufactured. Also in this case, the upper chord member 1 and the upper cross member 3 are supported by the intermediate portion floating above the floor surface before the step of arranging the lower cross member 4 so that the upper chord member 1 and the upper cross member 3 are supported from the floor surface. Since it bends in a downwardly convex arch shape due to the weight of the member, the lower cross member 4 and the lower chord member 2 can be easily attached and can be easily assembled into a dome shape. It is also possible to make the curvatures different between the string members 1 and 2 and the cross members 3 and 4.

The upper cross member 3, the lower cross member 4, the first diagonal member 5 and the second diagonal member 6 can also be formed from an extruded aluminum member having a cross section of an angle shape or a groove shape. FIG. 12 shows a procedure for manufacturing the upper cross member 3 from the aluminum extruded shape member 26 having an angle cross section. In this case, as shown in FIG. 12B, a predetermined portion of the aluminum extruded shape member 26 is shown. It is only necessary to form a flat plate-like connecting part 10 by spreading out, and the connecting part 10 becomes the connecting part 11 as it is. Similarly, when the first diagonal member 5 and the second diagonal member 6 are formed, the shape members are partially expanded to form a flat upper connecting portion and a lower connecting portion, and thereafter, as shown in FIG. As shown, it can be formed by bending the member diagonally at the front connecting part and the rear connecting part.
Further, the connecting portions 11 and 13 between the connecting portions of the upper cross member 3 and the lower cross member 4 and the straight portions 16 and 19 of the first diagonal member 5 and the second diagonal member 6 are shown in FIGS. It can also be a cross-sectional shape as shown in b).

  The present invention is not limited to the embodiments described above. In the assembling process, the tip of the rivet 20a protruded from the upper chord material 1 is crushed, and the connecting portions 8, 10 of the upper chord material 1 and the upper cross member 3 and the upper connection of the first diagonal member 5 and the second diagonal member 6 are connected. You may perform the operation | work which fixes the parts 14 and 17 after the 2nd diagonal member 6 has been arrange | positioned. Further, without forming the rivet insertion hole 24 in the upper chord material 1, the rivet 20 a can be fixed to the upper chord material 1 by welding or the like. Further, the rivets 20b for fixing the lower connecting portions 15 and 18 of the first diagonal member 5 and the second diagonal member 6 and the connecting portions 12 and 9 of the lower cross member 4 and the lower chord member 2 of the first diagonal member 5 Instead of projecting upward from the rivet insertion hole 24 of the lower connecting portion 15, it may be provided to project downward from the rivet insertion hole 24 of the lower chord material 2, or from the lower chord material 2 side after the lower chord material 2 is arranged. You may make it insert in the rivet insertion hole 24 of each member. The step of supporting the upper chord material 1 by floating the intermediate portion from the floor surface 35 is the first step, that is, the upper chord material 1 may be disposed with the intermediate portion floated from the floor from the beginning, or the lower chord material 2 is disposed. You may go right before. As a fixing tool, not only a rivet but also a bolt and a nut can be used. The interval between the chord members 1 and 2 and the interval between the cross members 3 and 4 are not necessarily the same, and can be appropriately adjusted according to the shape and installation state of the truss structure. In the case of a truss structure having a rectangular shape in plan view where the lengths of the chord members 1 and 2 are longer than the length of the chord member 1, by making the interval between the chord members 1 and 2 smaller than the interval between the cross members 3 and 4, It is possible to suppress an increase in weight while giving higher strength in the direction of the chords 1 and 2.

It is a front view which shows the procedure at the time of assembling a truss structure in order. It is a top view which shows the procedure at the time of assembling a truss structure. It is a perspective view which decomposes | disassembles and shows each member which comprises a truss structure in the attitude | position when assembling. (A) is a top view in the installation state of a truss structure, (b) is the same front view. It is an enlarged front view of the truss structure. It is an enlarged side view of the truss structure. It is the perspective view of the truss structure seen from the X direction of FIG. (A) is a partial top view of an upper chord material, (b) is CC sectional drawing of (a). (A) is a partial top view of an upper crosspiece, (b) is AA sectional drawing of (a), (c) is BB sectional drawing of (a). (A) is a top view of a 1st diagonal material, (b) is the same front view, (c) is AA sectional drawing of (b). It is a figure which shows other embodiment of the cross-sectional shape of the connection part of a horizontal member, and the linear part of a diagonal. It is a figure which shows the procedure which manufactures an upper crosspiece from an angle-shaped aluminum extrusion shape material, Comprising: (a) is a top view and side view of the member in the state before processing, (b) is the member after processing It is a top view and a side view.

Explanation of symbols

1 Upper chord material (one side chord material)
2 Lower chord material (other side chord material)
3 Upper crosspiece (one side crosspiece)
4 Lower cross member (the other side cross member)
5 1st diagonal material 6 2nd diagonal material 7 ridge 8, 9, 10, 12 connection part 14, 17 upper connection part (one side connection part)
15, 18 Lower connection part (the other connection part)
11, 13 Connecting portion between connecting portions 16, 19 Straight portion 20a, 20b Rivet (fixing tool)
24 Rivet insertion hole (fixing tool insertion hole)
25 Bending part A Interval of rivet insertion hole (rivet) of upper chord material B Interval of rivet insertion hole of lower chord material

Claims (3)

  One side chord material with a non-hollow cross-section having a plurality of connecting portions with flat upper surfaces provided at intervals in the longitudinal direction and protruding fixtures upward from each connecting portion is parallel to each other at equal intervals. A non-hollow cross-sectional one side member having a plurality of flat connecting portions provided at intervals in the longitudinal direction and having a fixing tool insertion hole in each connection portion. A step of superimposing the connecting portion on the connecting portion of the one side chord material while inserting the fixing tool into the chord member and arranging them parallel to each other in the direction orthogonal to the arrangement direction of the one side chord material, Non-hollow with zigzag shape having a plurality of side connecting portions and a flat other side connecting portion, and a straight portion located between the one side connecting portion and the other side connecting portion, and each connecting portion having a fastener insertion hole The first diagonal member of the cross section is inserted into the fixing tool insertion hole while the one side connecting portion is inserted into the fixing tool insertion hole. A step of arranging the flat one side connecting portion and the flat other side connection on the connecting portion of the horizontal member in an oblique manner with respect to the one side chord member and the one side cross member and in parallel with each other. A second diagonal member having a non-hollow cross-section having a fastener insertion hole in each connecting portion in a zigzag shape having a plurality of portions and a plurality of linear portions located between the one side connecting portion and the other side connecting portion While inserting the fixing tool into the tool insertion hole, the one side connecting portion is overlapped on the one side connecting portion of the first diagonal member, and the other side connecting portion is overlapped on the other side connecting portion of the first diagonal member. A step of crossing the diagonal member and arranging it parallel to the one side chord member and one side transverse member at an equal interval and a plurality of flat connecting portions provided at intervals in the longitudinal direction. The other side cross member having a non-hollow cross-section in which each connecting part is provided with a fastener insertion hole, and the connecting part is the other side of the second diagonal member. A plurality of connecting portions that are stacked on the connecting portion and arranged parallel to each other in the same direction as the arrangement direction of the one side cross member, and a flat bottom surface provided at intervals in the longitudinal direction. The other side chord material having a non-hollow cross-section in which the fastener insertion holes are provided in the connecting portion at intervals smaller than the interval of the one side chord material fixing portion, and the connecting portion is overlapped on the other side cross member connecting portion. Before placing the other side chord material in the same direction as the arrangement direction of the one side chord material and the step of placing the other side chord material in the middle. A method for assembling a truss structure, comprising: a step of floating and supporting from a surface; and a step of fixing a connecting portion of each member to be laminated with a fixing tool inserted into a fixing tool insertion hole.   One side chord material with a non-hollow cross-section having a plurality of connecting portions with flat upper surfaces provided at intervals in the longitudinal direction and protruding fixtures upward from each connecting portion is parallel to each other at equal intervals. A non-hollow cross-sectional one side member having a plurality of flat connecting portions provided at intervals in the longitudinal direction and having a fixing tool insertion hole in each connection portion. A step of superimposing the connecting portion on the connecting portion of the one side chord material while inserting the fixing tool into the chord member and arranging them parallel to each other in the direction orthogonal to the arrangement direction of the one side chord material, Non-hollow with zigzag shape having a plurality of side connecting portions and a flat other side connecting portion, and a straight portion located between the one side connecting portion and the other side connecting portion, and each connecting portion having a fastener insertion hole The first diagonal member of the cross section is inserted into the fixing tool insertion hole while the one side connecting portion is inserted into the fixing tool insertion hole. A step of arranging the flat one side connecting portion and the flat other side connection on the connecting portion of the horizontal member in an oblique manner with respect to the one side chord member and the one side cross member and in parallel with each other. A second diagonal member having a non-hollow cross-section having a fastener insertion hole in each connecting portion in a zigzag shape having a plurality of portions and a plurality of linear portions located between the one side connecting portion and the other side connecting portion While inserting the fixing tool into the tool insertion hole, the one side connecting portion is overlapped on the one side connecting portion of the first diagonal member, and the other side connecting portion is overlapped on the other side connecting portion of the first diagonal member. A step of crossing the diagonal member and arranging it parallel to the one side chord member and one side transverse member at an equal interval and a plurality of flat connecting portions provided at intervals in the longitudinal direction. And the connecting portion is provided with fixing tool insertion holes at intervals smaller than the interval of the fixing tool insertion holes on the one side cross member. A step of placing the connecting member on the other side of the empty cross section on the other connecting portion of the second diagonal member and arranging them in parallel at equal intervals in the same direction as the one side member; Before the step of disposing the other side cross member, a step of supporting the one side chord material by floating the intermediate portion from the floor surface, and a plurality of connecting portions having flat bottom surfaces provided at intervals in the longitudinal direction The other side chord material having a non-hollow cross-section in which the fastener insertion holes are provided in the connecting portion at intervals smaller than the interval between the one side chord material fixing member, and the connecting portion is placed on the other side cross member connecting portion. A step of overlapping and arranging in parallel in the same direction as the arrangement direction of the one-side chord material, and fixing a connecting portion of each member to be laminated with a fixing tool inserted into the fixing tool insertion hole; A method for assembling a truss structure characterized by comprising:   The one-side chord material is a member having at least two ridges whose upper surface is flat and protrudes downward, and the other-side chord material has at least two ridges whose bottom surface is flat and protrudes upward. The one side cross member and the other side cross member are members having a bent portion in the cross section of the connecting portion between the connecting portions, and the first diagonal member and the second diagonal member are bent portions in the cross section of the straight portion. The method for assembling a truss structure according to claim 1 or 2, wherein the member is a member having a structure.

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