JP4812491B2 - Aluminum truss structure - Google Patents

Description

  The present invention relates to an aluminum truss structure formed by three-dimensionally assembling aluminum rod-like members.

Conventionally, steel members having a circular cross section are mainly used for each member such as a chord member and a diagonal member constituting a three-dimensional truss in order to ensure buckling strength. And in order to connect each member which consists of pipes mutually, the end part of a pipe and a middle part of a pipe are crushed flat, a plate-like connection part is formed, and connection parts are piled up with a bolt and a nut. It is made to fasten (refer patent document 1). In order to reduce the weight, some aluminum hollow extruded profiles are used instead of steel pipes. Patent Document 2 describes an aluminum extruded profile in which a hollow base portion having a circular cross section and a thick and flat flange portion are formed integrally in the middle of the hollow base portion in the vertical direction as a structural member for a three-dimensional truss. In this structural member for a three-dimensional truss, the hollow base portion is cut and removed symmetrically in a vertical direction at a predetermined position in the longitudinal direction to expose the flange portion, and the flange portion is used as a connecting portion between members.
JP 2003-268872 A JP 2004-213782 A

  As described above, when steel pipes or hollow extruded shapes are used, the members cannot be connected to each other with the same cross-sectional shape, and the plate-like connecting portion is formed by crushing the pipe or cutting the hollow portion. It is necessary to form many, and it takes time to manufacture each member. In addition, the diagonal material is bent into a V shape by providing connecting portions at both ends and the center (see Patent Document 2 and FIG. 6), and a large number of diagonal materials must be arranged. Was not easy. Furthermore, the aluminum extruded profile in which the circular pipe-shaped hollow base portion and the flange portion described in Patent Document 2 are integrally formed is light in weight because the thickness of the member becomes thick and heavy even if the material is aluminum. I cannot plan as expected. The present invention has been made in view of the above circumstances, and an object thereof is to provide a lightweight aluminum truss structure that can be easily manufactured and easily assembled.

In order to achieve the above object, the aluminum truss structure of the present invention includes a front chord member, a rear chord member, a front cross member, a rear cross member, one side diagonal member, and the other side diagonal member. And the front chord member has a non-hollow cross-section aluminum extruded shape having at least two ridges protruding from the front side surface and a plurality of connecting portions provided on the flat rear side surface at intervals in the longitudinal direction. The rear chord members are arranged in parallel at equal intervals in the left-right direction. The rear chord member is spaced at least two ridges protruding from the rear side surface and the flat front side surface in the longitudinal direction. A non-hollow cross-section aluminum extruded section having a plurality of connecting portions provided in parallel, arranged in parallel at equal intervals in the left-right direction, and the front cross member abuts the connecting portion of the front chord member. A flat connecting portion that is in contact with each other, and a linear portion that is located between the connecting portions and has a curved portion in cross section. This is a non-hollow cross-section aluminum member, arranged in parallel at equal intervals in a direction perpendicular to the direction of arrangement of the front chord material, and the rear cross member is in contact with the connecting portion of the rear chord material. It is a non-hollow cross-section aluminum member having a flat connecting portion in contact with each other and a straight portion positioned between the connecting portions and having a curved portion in cross section, and is equally spaced from each other in a direction perpendicular to the arrangement direction of the rear chord material The spacing dimension between the front chord members and the spacing dimension between the rear chord members are equal, the spacing dimension between the front cross members and the spacing dimension between the rear cross members are equal, The distance between the front chord material and the rear chord material is different from the distance between the front cross member and the rear cross member, and the rear chord material is half the distance from the position just behind the front chord material. It is in a position shifted in the left-right direction by the dimension, and the rear side member is from the position just behind the front side member. The one-side diagonal member and the other-side diagonal member are located at a position shifted by one-half of the separation dimension in the arrangement direction of the rear side member, and the front side connecting portion and the flat rear side connecting portion are connected to the front side. It is a non-hollow cross-section aluminum member having a plurality of straight portions that are located between the connecting portion and the rear connecting portion and have a curved portion in cross section, and the one side diagonal member has the rear connecting portion as the rear side member. The front connecting portion is in contact with the rear side surface of the front side connecting portion of the other diagonal member, and is disposed obliquely and parallel to the chord material and the cross member at equal intervals. In the other side diagonal member, the rear side connecting portion is in contact with the front side surface of the rear side connecting portion of the one side diagonal member, the front side connecting portion is in contact with the rear side surface of the front side cross member, and the one side diagonal member is Crossing the material and obliquely with respect to the chord material and the transverse material, and arranged in parallel at equal intervals, the same connecting portion of each member in contact with each other It is characterized by fixing the master.
The straight portions of the front cross member, the rear cross member, the one side diagonal member, and the other side diagonal member may be formed in a cross-sectional shape that can ensure a certain buckling strength, for example, an angle shape or a groove shape. It can be a cross-sectional shape. The front cross member, the rear cross member, the one side diagonal member, and the other side diagonal member may be manufactured from a flat belt-like plate (in this case, the straight portion is formed by bending), but an angle shape or It can also be manufactured from an extruded profile having a groove-shaped cross section (in this case, a predetermined portion of the profile is flatly spread to form a connecting portion). The aluminum extruded shape member and the aluminum member include those made of an aluminum alloy.

  The aluminum truss structure of the present invention has a non-hollow cross-section having a non-hollow cross-section aluminum extruded shape having protrusions protruding from the front side surface and the rear side surface, and a connecting portion and a straight portion located between the connecting portions. Since aluminum members are used, it is easy to provide flat connecting parts compared to the case of using pipes, so that each member can be easily manufactured, and the weight can be greatly reduced. . Moreover, the front chord member and the rear chord member have at least two ridges projecting from the front side surface and the rear side surface, respectively, so that the front side cross member, the rear side cross member, the one side diagonal member, and the other side diagonal member are Since a sufficient buckling strength can be ensured by having a straight portion having a bent portion in the cross section between the connecting portions, a truss structure that satisfies the required strength can be obtained. Further, by not using a pipe, the edges and corners of each member are emphasized, and a truss structure that gives a sharp impression to the viewer is obtained. Furthermore, since the aluminum truss structure of the present invention has a flat connecting portion on each member, the members are sequentially arranged in a predetermined order, and abut against each other between the protrusions of the front chord member and the rear chord member. The connecting parts of each member can be easily manufactured by simply fixing them with a fixing tool such as a rivet or friction stir welding (FSW). Further, when assembling, the one side diagonal member is arranged on the rear side, and the other side diagonal member is arranged on the front side, and the front side connecting portion and the rear side connecting portion are overlapped with each other in the manner of overlapping the front side connecting portion and the rear side connecting portion. In this case, the assembly can be easily performed, and the length between the front side connecting portion and the rear side connecting portion of both members is constant, so that both members can be easily manufactured. The front chord member and the front cross member connecting portion and the front side connecting portion of the one side / other side diagonal member contact each other, and the rear chord member and the rear cross member connecting portion and one side Fixing work using rivets, etc., because the rear connecting part where the rear connecting part of the side and the other side diagonal material abuts each other is at a position shifted from each other in the vertical and horizontal directions when viewed from the front side. Easy to do.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of an aluminum truss structure according to the present invention, FIG. 2 is a partial plan view of the aluminum truss structure, and FIG. 3 is a partial front view. This truss structure is a combination of six kinds of single members: front chord member 1, rear chord member 2, front cross member 3, rear cross member 4, one side diagonal member 5, and other side diagonal member 6. Configured. The rear chord member 2 is arranged in parallel at a constant interval in the left-right direction at the rearmost position of the truss structure. On the front side surface of the rear chord member 2, the rear cross member 4 intersects the rear chord member 2 and has a certain interval in the direction (vertical direction) perpendicular to the arrangement direction of the rear chord member 2. And arranged in parallel. The front chord member 1 is arranged in parallel at a constant interval in the left-right direction at the frontmost position of the truss structure. Immediately behind the front chord material 1, a front cross member 3 intersects the front chord material 1 and is arranged in parallel in the vertical direction with a certain interval. The spacing dimension between the front chord members 1, the spacing dimension between the rear chord members 2, the spacing dimension between the front cross members 3, and the spacing dimension between the rear cross members 4 are all equal (200 mm) and as shown in FIG. Further, the rear chord member 2 is located at a position shifted in the left-right direction by a half of the distance from the position immediately behind the front chord member 1, and the rear cross member 4 is the front cross member 3. It is located in the position shifted | deviated to the up-down direction only by the half dimension of the space | interval dimension from the back position. The distance L between the front side member 3 and the rear side member 4 is 100 mm.
The one-side diagonal member 5 is disposed obliquely and parallel to the chord members 1 and 2 and the cross members 3 and 4 at a predetermined distance from each other, and the intersection and the rear of the front chord member 1 and the front cross member 3 are arranged. The side chord member 2 and the crossing portion of the rear cross member 4 are connected. The other side diagonal member 6 intersects with the one side diagonal member 5 and is arranged obliquely with respect to the chord members 1 and 2 and the cross members 3 and 4 in parallel with each other at equal intervals. And the intersection of the front cross member 3 and the cross part of the rear chord member 2 and the rear cross member 4 are connected. The front chord member 1, the front cross member 3, the one side diagonal member 5 and the other side diagonal member 6 are in contact with each other and intersect each other, the rear member connecting portion 21, the rear chord member 2, the rear cross member 4, and one The rear member connecting portions 22 where the side diagonal member 5 and the other side diagonal member 6 abut each other and intersect with each other are fixed by rivets 20, respectively.

  The front chord member 1 is an aluminum alloy extruded shape, and has protrusions 7 and 7 protruding from both side edges of the front side surface as shown in FIG. The base 23 is provided. The space between the two ridges 7 and 7 is a fixing space S for fixing the connecting portions of the members that come into contact with each other with the rivet 20, and a space of 10 mm is provided between the ridges. The thickness of the base 23 is 1.5 mm. A plurality of connecting portions 8 are provided on the flat rear side surface of the front chord member 1 at regular intervals in the longitudinal direction, and rivet insertion holes 24 are formed in the connecting portion 8. The distance between the connecting portions 8 is the same as the distance between the front side members 3. The rear chord member 2 is an aluminum alloy extruded shape member having the same cross-sectional shape as the front chord member 1, and the direction of the protrusion is opposite to that of the front chord member 1 so that the protrusion 7 protrudes on the rear side surface. It is used. As with the front chord material 1, the rear chord member 2 is provided with a plurality of connecting portions 9 for connecting the rear cross members 4 at regular intervals in the longitudinal direction of the flat front side surface. A rivet insertion hole 24 is formed.

  The front 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. A plurality of flat plate-like connecting portions 10 are formed, and each connecting portion 10 is bent by a press machine, and as shown in FIG. A straight portion 11 is provided. A rivet insertion hole 24 is formed at the center of the connecting portion 10. The rear cross member 4 is a member having the same shape as the front cross member 3, and a strip-like plate is cut out from the aluminum alloy plate as in the case of the front 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 straight portions 13 having an angle-shaped cross section are formed.

  The one-side 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 mm. As shown in FIGS. A flat plate-like front side connecting portion 14 and a rear side connecting portion 15 are alternately formed every time, and the space between the connecting portions 14 and 15 is the same as that of the front and rear side members 3 and 4 by a press machine. A plurality of straight portions 16 having an angled cross section having a bent portion 25 as shown in FIG. 6C are provided by bending. Further, as shown in FIG. 6B, the longitudinal end portion of the front connecting portion 14 is obliquely bent rearward, and the longitudinal end portion of the rear connecting portion 15 is obliquely bent forward. It is formed in a zigzag shape. A rivet insertion hole 24 is formed at the center of the front connection part 14 and the rear connection part 15. The other-side diagonal member 6 is a member having the same shape as the one-side diagonal member 5, and is formed by bending a belt-like plate cut out from an aluminum alloy plate material, thereby forming a flat plate-like front side connecting portion 17 and a rear side. A connecting portion 18 and a straight portion 19 having an angle-shaped cross section are formed. The length between the front connecting portions 14, 17 and the rear connecting portions 15, 18 (the length of the straight portions 16, 19) is also the same for the one side diagonal member 5 and the other side diagonal member 6.

  Next, a procedure for constructing a truss structure using the above-described members will be described with reference to FIG. First, as shown in FIG. 7 (a), after the rear chord member 2 is sequentially arranged vertically with a certain interval in the left-right direction, the rear cross member 4 is connected to the connecting portion 12 of the rear chord member. The material 2 is sequentially arranged side by side so as to be placed on the connecting portion 9 of the material 2. Next, as shown in FIG. 7 (b), the one-side diagonal member 5 is sequentially arranged obliquely so that the rear side connecting portion 15 is placed on the connecting portion 12 of the rear side member 4. Next, as shown in FIG. 7 (c), the other side diagonal member 6 intersects with the one side diagonal member 5, and the rear side connecting portion 18 and the front side connecting portion 17 are connected to the rear side of the one side diagonal material 5. They are sequentially arranged obliquely so as to be placed on the connecting portion 15 and the front connecting portion 14, respectively. Next, as shown in FIG. 7 (d), the front cross member 3 is sequentially arranged side by side so that the connecting portion 10 is placed on the front connecting portion 17 of the other diagonal member 6, and finally The front chord material 1 is sequentially arranged vertically such that the connecting portion 8 is placed on the connecting portion 10 of the front cross member 3. After assembling the members, the front and rear member connecting portions 21 and 22 where the connecting portions of the members come into contact with each other are sequentially fixed by the rivets 20 between the ridges 7 and 7.

In this truss structure, as described above, each member 1, 2, 3, 4, 5, 6 is a member having a non-hollow cross section and has a flat connecting portion. There is no need to form a connecting part by cutting or notching, and each member is assembled in a predetermined shape, and the front and rear member connecting portions 21 and 22 are simply fixed by the rivet 20 between the ridges 7 and 7. This makes it easy to produce. As shown in FIG. 2, the front-side member connecting portion 21 and the rear-side member connecting portion 22 are in positions shifted in the vertical direction and the left-right direction. Certain members 1 and 3 do not get in the way, and fixing work is easy. The rivet 20 may use a self-piercing rivet. FIG. 10 shows a process in the case of fixing by the self-piercing rivet 20a. First, as shown in FIG. 10 (a), the connecting portions 8, 10, 17, and 14 of the members that come into contact with each other are shown in the tool 27. , 28 (the tool 27 is inserted into the fixed space S of the string material), and the self-piercing rivet 20a is supplied to the front tool 27 and pressurized as shown in FIG. 10B. The connecting portions 8, 10, 17, and 14 do not need to be previously prepared. As shown in FIG. 10 (c), the shaft portion of the self-piercing rivet 20a penetrates the connecting portions 8 and 10 of the front member, and the die 29 within the connecting portions 14 and 17 of the rear member. It develops into a shape, and the connecting portion of each member is firmly fixed. The upper surface of the self-piercing rivet 20a is flush with the front side surface of the string material coupling portion 8, and a coupling portion having a flat front side surface is formed.
In addition, bolts and nuts can be used in place of the rivets to fix the member connecting portions 21 and 22. Further, instead of mechanically fixing with a fixing tool such as a rivet, bolt or nut, the member connecting portions 21 and 22 can be fixed by friction stir welding. The fixing operation of the member connecting portions 21 and 22 may be performed only from the front side, but may be performed from both the front side and the rear side.

In the above-described embodiment, the spacing dimension between the front chord members 1, the spacing dimension between the rear chord members 2, the spacing dimension between the front cross members 3, and the spacing dimension between the rear cross members 4 are all equal. However, as shown in FIG. 11, the spacing dimension between the front chord members 1 and the spacing dimension between the rear chord members 2 is A, and the spacing dimension between the front cross members 3 and the spacing dimension between the rear cross members 4 are as follows. , B may be different from the distance A between the front and rear chords. The rear chord member 2 is located at a position shifted from the right rear position of the front chord member 1 in the left-right direction by a half of the interval dimension. The rear cross member 4 is the true of the front cross member 3. It is located at a position shifted from the rear position in the vertical direction by a half of the interval dimension. Even in this case, the same members as those of the above-described embodiment can be used and assembled in the same procedure.
In this way, by making the gap between the front and rear chords different from the gap between the front and rear chords, the grid formed by the chord and the cross becomes a rectangular design. If the load applied to the chord material and the cross member is different, for example, when the truss structure is used in an oblique or vertical position, adjust the number of strings and cross members as appropriate. Thus, it is possible to reduce the weight while ensuring the necessary strength.

  The truss structure can be manufactured in any size and shape by appropriately changing the length of each member, the number of members to be used, and the distance between the members. The use of the truss structure is not particularly limited, and can be widely used as a component of various structures such as a floor slab and a roof of a simple structure, and not only in a plane, It can also be used in an oblique or vertical position. The straight portions of the front / rear side members and the one / other side slant members may be formed in a cross-sectional shape that can ensure the required buckling strength. For example, as shown in FIG. The central portion may be formed in an angle-shaped cross-section while leaving a plate-like portion, or may be formed in a U-shaped groove-shaped cross-section as shown in FIG. Good. The front side member, the rear side member, the one side diagonal member and the other side diagonal member are not limited to those cut out from an aluminum plate, but can be formed from a flat strip-like extruded shape member.

  The front side cross member, the rear side cross member, the one side diagonal member, and the other side diagonal member can be formed from an extruded aluminum member having a cross section of an angle shape or a groove shape. FIG. 9 shows a procedure for producing a front side member from an aluminum extruded shape member 26 having an angle cross section. In this case, as shown in FIG. 9B, a predetermined portion of the aluminum extruded shape member 26 is formed. It is only necessary to form a flat plate-like connecting portion 10 by spreading, and the space between the connecting portions 10 becomes the straight portion 11 as it is. Similarly, when forming the one side diagonal member and the other side diagonal member, the shape members are partially expanded to form flat front side connecting portions and rear side connecting portions, and thereafter, as shown in FIG. 6 (b). It can be formed by bending the member diagonally at the front connection part and the rear connection part.

It is a perspective view which shows schematic structure of the aluminum truss structure of this invention. It is a partial top view of the aluminum truss structure of the present invention. It is a partial front view of the aluminum truss structure of the present invention. (A) is a partial top view of a front side chord material, (b) is AA sectional drawing of (a). (A) is a partial top view of a front cross member, (b) is AA sectional drawing of (a), (c) is BB sectional drawing of (a). (A) is a top view of one side diagonal material, (b) is the same front view, (c) is AA sectional drawing of (b). It is a top view which shows the procedure at the time of constructing | assembling the aluminum truss structure of this invention in order. It is sectional drawing of the linear part which shows other embodiment of a linear part. It is a figure which shows the procedure which manufactures a front side member 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. It is sectional drawing which shows the process in the case of fixing the connection part of each member which contact | abuts with a self piercing rivet. It is a top view which shows other embodiment of the aluminum truss structure of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front chord material 2 Rear chord material 3 Front side cross member 4 Rear side cross member 5 One side diagonal member 6 Other side diagonal member 7 Projection 8, 9, 10, 12, Connecting part 14, 17 Front side connecting part 15, 18 Rear connection part 11, 13, 16, 19 Straight part 20 Rivet (fixing tool)
25 Curved part

Claims (1)

The front chord member, the rear chord member, the front cross member, the rear cross member, the one side diagonal member, and the other side diagonal member are provided, and the front chord member protrudes from the front side surface. It is a non-hollow cross-section aluminum extruded section having a protrusion and a plurality of connecting portions spaced in the longitudinal direction on the flat rear side surface, and arranged parallel to each other at equal intervals in the left-right direction. A non-hollow cross-section aluminum extruded member having at least two ridges projecting from the rear side surface and a plurality of connecting portions provided on the flat front side surface at intervals in the longitudinal direction; The front crosspieces are arranged in parallel at equal intervals in the left-right direction, and the front cross member is a flat connecting portion that contacts the connecting portion of the front chord member, and a bent portion in the cross section that is located between the connecting portions. A non-hollow cross-section aluminum member having a straight portion with The rear cross members are arranged in parallel with each other at equal intervals in the direction in which the flat cross-section is in contact with the connection portion of the rear chord member, and the bent portion is located between the connection portions and in the cross section. It is a non-hollow cross-section aluminum member having a straight line portion, and is arranged in parallel at equal intervals in a direction orthogonal to the arrangement direction of the rear chord material. The spacing between the side chords is the same, the spacing between the front crossings is the same as the spacing between the rear crossings, the spacing between the front chording and the rear chording, the front crossing and the rear The distance between the cross members is different, and the rear chord is located in a position shifted in the left-right direction by a half of the distance from the rear position of the front chord , and the rear cross is the front A position shifted from the position just behind the cross member in the arrangement direction of the rear cross member by a half of the distance dimension. The one side diagonal member and the other side diagonal member are a flat front side connecting portion and a flat rear side connecting portion, and a linear portion located between the front side connecting portion and the rear side connecting portion and having a bent portion in a cross section. A non-hollow cross-section aluminum member, and the one side diagonal member has a rear connecting portion that contacts a front side surface of the connecting portion of the rear side member, and the front connecting portion is a front side connecting portion of the other side diagonal member. It is in contact with the rear side surface and is arranged obliquely and in parallel with each other at equal intervals with respect to the chord member and the cross member. The other side diagonal member has the rear side connecting portion connected to the rear side of the one side diagonal member. The front connecting part contacts the rear side of the connecting part of the front cross member, crosses the diagonal member on one side and is obliquely spaced from the chord member and the cross member and equidistant from each other. An aluminum truss structure characterized in that the connecting portions of members that are arranged in parallel and are in contact with each other are fixed.