Structure and method for manufacturing structure

Abstract

To provide a structure in which high strength is secured and weight is reduced, and a method for manufacturing the structure.SOLUTION: A main body portion 11 that is formed in a closed cross-sectional shape having a hollow portion 21 surrounded by side walls 23,25 and is made of an extruded aluminum material in which a through-hole 27 penetrating side walls 23 facing each other is formed, and a collar member 13 and a joint member 15 that are disposed inside the hollow portion 21, reinforce the main body portion 11 from the inside, and are made of an aluminum material, the collar member 13 and the joint member 15 are joined to the side wall 23,25 of the main body 11 by a joint portion J that penetrates the side wall 23,25 of the main body 11 and reaches the collar member 13 and the joint member 15.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a structure and a method for manufacturing a structure. [Background technology]

[0002] For example, in civil engineering works, shoring is used to support formwork with jacks. Patent Document 1 discloses a shoring made of steel material with joints attached to both ends of a square tubular main body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model No. 3243410 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, it is desirable for shoring to be lightweight in order to improve construction workability, but the above-mentioned shoring is made of steel and is therefore heavy, placing a heavy burden on workers.

[0005] Furthermore, the support structure must be strong enough to support the load from the jack. However, in the above-mentioned support structure, for example, in a structure in which both ends of the main body and the plate-shaped base of the joint that butts against these ends are attached by welding from the outside using arc welding or the like, the thickness of the main body and the base must be increased to ensure high joint strength, which results in an even greater weight.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a structure that ensures high strength and is lightweight, and a method for manufacturing such a structure. [Means for solving the problem]

[0007] The present invention comprises the following configurations. (1) A main body portion made of an extruded aluminum material formed in a closed cross-sectional shape having a hollow portion surrounded by side walls, and having through holes penetrating the opposing side walls; a reinforcing member made of aluminum material that is disposed inside the hollow portion and reinforces the main body from the inside; and the reinforcing member is joined to the side wall of the main body portion by a joint that penetrates the side wall of the main body portion and reaches the reinforcing member; structure. (2) preparing a main body made of an extruded aluminum material formed into a closed cross-sectional shape having a hollow portion surrounded by side walls, and having through holes penetrating the opposing side walls; a reinforcing member made of aluminum material is inserted into the hollow portion of the main body; The side wall and the reinforcing member are joined from the outside of the main body portion to form a joint portion that penetrates the side wall and reaches the reinforcing member; As the reinforcing member, a reinforcing member having a thickness equal to or greater than the width dimension of the joint is used. Method for manufacturing the structure. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a structure that ensures high strength and is lightweight, and a method for manufacturing the structure. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of the structure. [Figure 2] FIG. 2 is a perspective view of the structure cut along its longitudinal direction. [Figure 3] FIG. 3 is an exploded perspective view of the structure. [Figure 4] FIG. 4 is a front view of the main body as seen from the end. [Figure 5] FIG. 5 is a cross-sectional view of a portion of the structure illustrating the joint between the base material and the reinforcing member. [Figure 6] FIG. 6 is a perspective view of a structure according to another configuration example. [Figure 7] FIG. 7 is a perspective view of a structure according to another configuration example, cut along the longitudinal direction. [Figure 8] FIG. 8 is a perspective view showing the manufacturing process of the structure step by step. [Figure 9] FIG. 9 is a perspective view showing the manufacturing process of the structure step by step. [Figure 10] FIG. 10 is a perspective view showing the manufacturing process of the structure step by step. [Figure 11] FIG. 11 is a perspective view showing the manufacturing process of the structure step by step. [Figure 12] FIG. 12 is a perspective view showing the manufacturing process of the structure step by step. [Figure 13] FIG. 13 is a perspective view showing the manufacturing process of the structure step by step. [Figure 14] FIG. 14 is a perspective view showing the manufacturing process of the structure step by step. [Figure 15] FIG. 15 is a cross-sectional view of a portion to be joined, illustrating the joining process of a structure. [Figure 16] FIG. 16 is a cross-sectional view of a portion to be joined, illustrating the joining process of a structure. [Figure 17] FIG. 17 is a perspective view showing the manufacturing process of the structure step by step. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [Structure] Fig. 1 is a perspective view of a structure 100. Fig. 2 is a perspective view cut along the longitudinal direction of the structure 100. Fig. 3 is an exploded perspective view of the structure 100.

[0011] As shown in Figures 1 to 3, a structure 100 according to this embodiment includes a main body 11, a collar member (reinforcing member) 13, and a pair of joint members (reinforcing members) 15. The structure 100 is used, for example, as a support for supporting formwork or the like with a jack in civil engineering work or the like. Note that the structure 100 is not limited to being used as a support, but may also be used as various members that require strength.

[0012] The main body 11 constituting the structure 100 is an extruded aluminum alloy material. The collar member 13 and the joint member 15 are also made of extruded aluminum alloy materials. The aluminum alloy used for the main body 11, collar member 13, and joint member 15 is preferably a 7000 series aluminum alloy as defined by the JIS or AA standards, because of its excellent strength. The main body 11, collar member 13, and joint member 15 are not limited to a 7000 series aluminum alloy, and may be made of other aluminum alloys such as a 6000 series aluminum alloy.

[0013] The main body 11 is formed in a closed cross-sectional shape having a hollow portion 21. The main body 11 is formed in the shape of a rectangular tube in cross section, having upper and lower side walls 23 and left and right side walls 25, and the hollow portion 21 is surrounded by the side walls 23, 25. A through-hole 27 is formed in the center of the main body 11 in the longitudinal direction, penetrating the upper and lower side walls 23 that face each other.

[0014] Fig. 4 is a front view seen from an end of the main body 11. In the main body 11 shown in Fig. 4, in which the four side walls 23, 25 are connected, corners C at the connected portions of the side walls 23, 25 have a radius of curvature of 1 mm (R1) or more and a thickness Tc that is equal to or greater than the thickness Tm of the side walls 23, 25. This increases the strength of the connected portions of the main body 11 where the side walls 23, 25 are connected, and particularly increases the bending strength.

[0015] The collar member 13 is formed in a cylindrical shape with a hole 31 having the same diameter as the through-hole 27 formed in the side wall 23 of the main body 11. The collar member 13 has end faces 33 at both ends. The collar member 13 has a pair of smooth surfaces 35 around its periphery. The smooth surfaces 35 are formed along the longitudinal direction of the collar member 13 at opposite positions.

[0016] The collar member 13 is disposed in the hollow portion 21 of the main body 11, and the hole portion 31 is in communication with the through-hole 27 of the main body 11. In this state, the peripheral surface of the collar member 13, which is made up of the end faces 33 and the smooth surfaces 35, is joined to the main body 11 by the joints J. Specifically, the collar member 13 has both end faces 33 joined to the upper and lower side walls 23 of the main body 11, and the smooth surfaces 35 joined to the left and right side walls 25 of the main body 11.

[0017] The joint member 15 has a flat plate portion 41. The flat plate portion 41 is formed in a rectangular plate shape having upper and lower side surfaces 43 and left and right side surfaces 45. The joint member 15 also has a fixing plate portion 47. The fixing plate portion 47 is integrally formed on one surface of the flat plate portion 41 and extends in the up-down direction at the center in the width direction. The fixing plate portion 47 has a bolt hole 47a formed therein.

[0018] The coupling member 15 is disposed within the hollow portion 21 with its flat plate portion 41 fitted into the hollow portion 21 at an end of the main body 11. In this state, the peripheral surface of the coupling member 15, consisting of side surfaces 43, 45, is joined to the main body 11 by joint J. Specifically, the coupling member 15 has the upper and lower side surfaces 43 of the flat plate portion 41 joined to the upper and lower side walls 23 of the main body 11, and the left and right side surfaces 45 of the flat plate portion 41 joined to the left and right side walls 25 of the main body 11.

[0019] In this way, in the structure 100 in which the reinforcing member made of the collar member 13 and the joint member 15 arranged inside the hollow portion 21 of the main body portion 11 is joined, the main body portion 11 is reinforced from the inside, increasing its strength. Specifically, the periphery of the through hole 27 in the main body portion 11 can be reinforced by the reinforcing member made of the collar member 13, and the end portion of the main body portion 11 can be reinforced by the reinforcing member made of the joint member 15.

[0020] Next, a description will be given of the joint J between the collar member 13 and the joint member 15 in the main body 11. Here, the side walls 23, 25 of the main body 11 are referred to as a base material M, and the collar member 13 joined to this base material M and the joint member 15 at the locations joined to the side walls 23, 25 are referred to as a reinforcing member S.

[0021] FIG. 5 is a cross-sectional view of a portion of a structure 100 illustrating a joint J between a base material M and a reinforcing member S. In the structure 100 shown in FIG. 5, the reinforcing member S is joined to the base material M by a joint J that penetrates the base material M, reaches the reinforcing member S, and bites into it. The reinforcing member S is joined to the base material M by friction stir welding. In other words, the joint J that joins the base material M and the reinforcing member S is a friction stir welded portion formed by friction stir welding. The reinforcing member S may also be joined to the base material M by laser welding.

[0022] Furthermore, the thickness Ts of the portion of the reinforcing member S that is joined by the joint J is set to be three times or more (Ts≧3Tm) the thickness Tm of the base material M. With such dimensions, the joining strength at the joint J is increased.

[0023] This structure 100 is connected, for example, by fastening the fixing plate portions 47 of the joint members 15 at both ends to the fixing plate portions 47 of the joint members 15 of other structures 100 with bolts or the like to form a support. In the support formed by this structure 100, a jack can be passed through the through-hole 27 reinforced by the collar member 13, and the formwork can be pressed and supported by this jack.

[0024] As described above, according to the structure 100, the collar member 13 and the flat plate portion 41 of the joint member 15, both made of aluminum, are provided as reinforcing members inside the hollow portion 21 of the main body 11 made of an extruded aluminum material, and the reinforcing member is joined to the side walls 23, 25 by a joint J that penetrates the side walls 23, 25 of the main body 11 and reaches the reinforcing member. As a result, compared to a structure made of steel material in which the reinforcing member is butt-welded to the main body, for example, it is possible to ensure high strength while achieving weight reduction by using aluminum for the main body 11 and the reinforcing member.

[0025] Next, a structure 200 according to another configuration example will be described. Note that the same components as those in the structure 100 of the above configuration example will be assigned the same reference numerals and descriptions thereof will be omitted.

[0026] Fig. 6 is a perspective view of a structure 200 according to another configuration example. Fig. 7 is a perspective view of a structure 200 according to another configuration example, cut along the longitudinal direction. The structure 200 shown in Figs. 6 and 7 includes a long main body 11, which has a plurality of through holes 27. In this example, the main body 11 has four through holes 27, which are spaced apart in the longitudinal direction of the main body 11.

[0027] In this structure 200, collar members 13 are provided at positions corresponding to the through holes 27 of the main body 11. These collar members 13 are joined to the main body 11 by joints J.

[0028] In this structure 200, for example, the fixing plate portions 47 of the joint members 15 at both ends are connected to the fixing plate portions 47 of the joint members 15 of other structures 200 or structures 100 by fastening with bolts or the like to form a support. In the case of a support formed from this structure 200, jacks can be passed through the multiple through holes 27 reinforced by the collar members 13, and the formwork can be pressed and supported by the jacks.

[0029] In the case of this structure 200, a collar member 13 made of aluminum and a flat plate portion 41 of a joint member 15 that serves as a reinforcing member for reinforcing from the inside are provided in a hollow portion 21 of a main body 11 made of an extruded aluminum material, and the reinforcing member is joined to the side walls 23, 25 by a joint J that penetrates the side walls 23, 25 of the main body 11 and reaches the reinforcing member. This makes it possible to achieve a weight reduction by using aluminum for the main body 11 and the reinforcing member while ensuring high strength.

[0030] [Method for manufacturing structure] Next, a method for manufacturing a structure will be described by taking as an example a case where a structure 100 having one through-hole 27 in the main body 11 is manufactured. In this example, a case where two structures 100 are manufactured will be described. Also, the fixing plate portion 47 of the joint member 15 is illustrated in a simplified form.

[0031] 8 to 14 and 17 are perspective views showing the manufacturing process of the structure 100 in stages. Figures 15 and 16 are cross-sectional views of the parts to be joined, illustrating the joining process of the structure 100.

[0032] (preparation process) As shown in FIG. 8, two main bodies 11 and two collar members 13 are prepared, and four joint members 15 are also prepared.

[0033] (Placement process) As shown in Figure 9, the collar member 13 is inserted into the hollow portion 21 of the main body 11. Then, the hole portion 31 of the collar member 13 is made to communicate with the through-hole 27 of the main body 11. Furthermore, as shown in Figure 10, the flat plate portions 41 of the coupling member 15 are fitted into the hollow portions 21 at both ends of the main body 11. In this way, an assembly 100A is produced in which the collar member 13 and the coupling member 15 are assembled to the main body 11.

[0034] Here, the length dimension of the collar member 13, which is the dimension between the end faces 33, is slightly (for example, about 0.5 mm) smaller than the dimension between the opposing upper and lower side walls 23 of the main body 11. Also, the width dimension of the collar member 13 at the location where the smooth surface 35 is formed is slightly (for example, about 0.5 mm) smaller than the dimension between the opposing side walls 25 of the main body 11. In this way, the collar member 13 used has an outer shape slightly smaller than the inner shape of the hollow portion 21 of the main body 11. Therefore, the collar member 13 can be inserted smoothly and without difficulty into the hollow portion 21 of the main body 11.

[0035] Furthermore, the flat plate portion 41 of the coupling member 15 has a height dimension, which is the dimension between the upper and lower side surfaces 43, that is slightly (for example, about 0.5 mm) smaller than the dimension between the opposing upper and lower side walls 23 of the main body 11. Furthermore, the flat plate portion 41 of the coupling member 15 has a width dimension, which is the dimension between the left and right side surfaces 45, that is slightly (for example, about 0.5 mm) smaller than the dimension between the opposing left and right side walls 25 of the main body 11. In this way, the coupling member 15 has an outer shape that is slightly smaller than the inner shape of the flat plate portion 41 and the hollow portion 21 of the main body 11. Therefore, the flat plate portion 41 of the coupling member 15 can be smoothly fitted into the hollow portion 21 of the main body 11 without any difficulty.

[0036] Next, as shown in Figure 11, assemblies 100A each having a collar member 13 and a coupling member 15 attached to a main body 11 are lined up, and a dummy member 51 is placed next to each of these assemblies 100A. This dummy member 51 is made of the same material and has the same shape as the main body 11 and is composed of a dummy main body 53 without a through hole 27, and a dummy coupling member 55 which is made of the same material and has the same shape as the coupling member 15. In this dummy member 51, dummy coupling members 55 are attached to both ends of the dummy main body 53. In addition, in the dummy member 51, a plurality of plates 57 are inserted into the dummy main body 53 and are positioned by being sandwiched between the dummy coupling members 55.

[0037] (Positioning process) 12, the assembly 100A and the dummy member 51 are positioned using a positioning jig 61. The positioning jig 61 has a base plate 63, an end positioning plate 65, a side positioning plate 67, and a hole positioning pin 69. The end positioning plate 65, the side positioning plate 67, and the hole positioning pin 69 are each provided in pairs and are erected on the base plate 63.

[0038] The end positioning plates 65 are arranged to face each other, and have fitting grooves 65a on their facing surfaces into which the fixing plate portions 47 of the coupling member 15 are fitted. The side positioning plates 67 are arranged on both sides between the end positioning plates 65. The hole positioning pins 69 are arranged in the center between the end positioning plates 65 and spaced apart to the side.

[0039] As shown in FIG. 13 , the assembly 100A and the dummy member 51 are assembled to the positioning jig 61 from above. When the assembly 100A and the dummy member 51 are assembled to the positioning jig 61, the hole positioning pin 69 is inserted into the through hole 27 of the main body 11 and the hole 31 of the collar member 13, which are connected to each other, and the fixing plate portion 47 of the coupling member 15 is fitted into the fitting groove 65a of the end positioning plate 65. Furthermore, after the assembly 100A and the dummy member 51 are assembled to the positioning jig 61, the side positioning plate 67 is pressed from the side. In this way, the assembly 100A is positioned in the positioning jig 61, and the assembly 100A and the dummy member 51 are arranged side by side without any gaps so that the outer surface of the dummy member 51 coincides with the outer surface of the main body 11 of the assembly 100A.

[0040] (Joining process) As shown in FIG. 14 , a joining process is performed on the assembly 100A positioned on the positioning jig 61. In this example, a friction stir tool is used, and this friction stir tool is moved along a joining path R while being rotated and pressed. Here, the joining path R is a path that starts at one dummy member 51 as a start point Rs, passes through the main body 11 of the assembly 100A from this start point Rs, and ends at the other dummy member 51 as an end point Re. Note that the joining path R that joins the upper side wall 23 of the main body 11 of the assembly 100A and the end face 33 of the collar member 13 is a two-path path that starts at the start point Rs of one dummy member 51, passes around both sides of the end face 33 of the collar member 13 on the main body 11, and ends at the end point Re of the other dummy member 51. In addition, the joining path R that joins the upper side wall 23 of the main body 11 of the assembly 100A and the side surface 43 of the flat plate portion 41 of the coupling member 15 is a path that runs from the starting point Rs of one dummy member 51, through the overlapping portion with the flat plate portion 41 of the main body 11, and to the ending point Re of the other dummy member 51.

[0041] As shown in Fig. 15, the friction stir tool 71 has a shape in which a probe 75 protrudes from the end face of a shoulder 73. As shown in Fig. 16, in friction stir welding, this friction stir tool 71 is pressed against the parts to be welded while being rotated, and moved along the welding path R. In this way, the parts to be welded are friction-stirred by the probe 75 of the friction stir tool 71, forming a weld J that penetrates the base material M and reaches the reinforcing member S, and joining the base material M and the reinforcing member S.

[0042] The collar member 13 and the flat plate portion 41 of the joint member 15, which are fitted into the hollow portion 21 of the main body portion 11, have an outer shape that is slightly smaller than the inner shape of the hollow portion 21 of the main body portion 11. Therefore, a slight clearance (about 0.5 mm) is generated between the base material M consisting of the main body portion 11 and the reinforcing member S consisting of the collar member 13 and the flat plate portion 41 of the joint member 15 (see FIG. 15). However, by pressing the friction stir tool 71 against the joint area while rotating, the base material M is pressed against the reinforcing member S by the shoulder 73 of the friction stir tool 71, so that the base material M and the reinforcing member S can be tightly joined together without any gaps (see FIG. 16).

[0043] In this example, the friction stir tool 71 has a probe diameter Dp equal to the thickness Tm of the base material M and a probe length Lp longer than the thickness Tm of the base material M (for example, about 0.5 mm longer) (see FIG. 15). The friction stir tool 71 also has a shoulder diameter Ds approximately three times the thickness Tm of the base material M. Note that this shoulder diameter Ds is preferably larger than the thickness Ts of the reinforcing member S. By using a friction stir tool 71 with such dimensions, friction stir welding can be performed while the base material M is satisfactorily pressed against the reinforcing member S, and a weld J with sufficient weld area and depth can be formed. The reinforcing member S used has a thickness Ts that is equal to or greater than the width Wj of the weld J when the weld J is formed (see FIG. 5).

[0044] Once the joining process on the upper side wall 23 of the main body 11 is completed, the assembly 100A and the dummy member 51 are removed from the positioning jig 61, turned upside down, and set back into the positioning jig 61, where the joining process on the lower side wall 23 of the main body 11 is performed (see Figure 14).

[0045] 17 , the assembly 100A and the dummy member 51 removed from the positioning jig 61 are laid sideways and arranged side by side, and the friction stir tool 71 is moved along a joining path R having a start point Rs and an end point Re on the dummy member 51 to perform joining on one of the left and right side walls 25. Next, the assembly 100A and the dummy member 51 are turned upside down, and the friction stir tool 71 is moved along a joining path R having a start point Rs and an end point Re on the dummy member 51 to perform joining on the other of the left and right side walls 25. Furthermore, the joining path R during the joining on the left and right side walls 25 is set to a path that passes through the joints J formed on the upper and lower side walls 23. This allows the joints J formed by the joining on the left and right side walls 25 to be connected and continuous to the joints J formed on the upper and lower side walls 23. Incidentally, even when performing the joining process on the left and right side walls 25 of the main body 11, the juxtaposed assembly 100A and dummy member 51 are positioned by the positioning jig.

[0046] As described above, according to the above-described method for manufacturing a structure, the collar member 13 and the flat plate portion 41 of the coupling member 15, both made of aluminum and reinforcing from the inside, are provided within the hollow portion 21 of the main body 11 made of an extruded aluminum material, and the reinforcing member is joined to the side walls 23, 25 by forming a joint J that penetrates the side walls 23, 25 of the main body 11 and reaches the reinforcing member. In addition, a reinforcing member having a thickness Ts equal to or greater than the width dimension Wj of the joint J is used as the reinforcing member. This makes it possible to manufacture a structure 100 that ensures high strength and is lightweight due to the use of aluminum for the main body 11 and the reinforcing member.

[0047] In the above manufacturing method, an example is given of friction stir welding using the friction stir tool 71, but the joining of the main body 11 to the collar member 13 and the coupling member 15 is not limited to friction stir welding, and may be joined by, for example, laser welding.

[0048] In the above embodiment, the flat plate portion 41 of the collar member 13 and the coupling member 15 is joined to the main body portion 11 along the entire periphery. However, for example, only the end faces 33 of the collar member 13 may be joined to the main body portion 11, or only the upper and lower side faces 43 of the flat plate portion 41 of the coupling member 15 may be joined to the main body portion 11.

[0049] As such, the present invention is not limited to the above-described embodiments, and the present invention also contemplates the mutual combination of the various components of the embodiments, as well as modifications and applications by those skilled in the art based on the description in the specification and well-known techniques, and these modifications and applications are included in the scope of protection sought.

[0050] As described above, the present specification discloses the following: (1) A main body portion made of an extruded aluminum material formed in a closed cross-sectional shape having a hollow portion surrounded by side walls, and having through holes penetrating the opposing side walls; a reinforcing member made of aluminum material that is disposed inside the hollow portion and reinforces the main body from the inside; and A structure wherein the reinforcing member is joined to the side wall of the body portion by a joint that passes through the side wall of the body portion and reaches the reinforcing member. According to this structure, a reinforcing member made of aluminum is provided inside the hollow portion of the main body made of an extruded aluminum material, and the reinforcing member is joined to the side wall by a joint that penetrates the side wall of the main body and reaches the reinforcing member. This ensures high strength while achieving weight reduction by using aluminum for the main body and reinforcing member.

[0051] (2) The structure according to (1), wherein the portion of the reinforcing member joined by the joint has a thickness three times or more the thickness of the side wall. According to this structure, the thickness of the portion of the reinforcing member that is joined by the joint is at least three times the thickness of the side wall of the main body, so that the joining strength at the joint can be increased.

[0052] (3) The main body is formed in a rectangular cross section with the four side walls connected together, The structure according to (1) or (2), wherein the corners at the connecting portions of the side walls have a radius of curvature of 1 mm or more and a thickness equal to or greater than the thickness of the side walls. According to this structure, the strength of the connecting portion where the side walls of the main body are connected can be increased, and the strength against bending in particular can be increased.

[0053] (4) The structure according to any one of (1) to (3), wherein at least the main body portion is made of a 7000 series aluminum alloy. According to this structure, since a 7000 series aluminum alloy is used as the material for the main body, the strength can be further increased.

[0054] (5) The reinforcing member is formed in a cylindrical shape having a hole, The structure according to any one of (1) to (4), wherein the peripheral surface is joined to the side wall in a state where the hollow portion of the main body portion is inserted and the hole portion is connected to the through hole of the main body portion. According to this structure, the main body can be reinforced by the cylindrical reinforcing member, and in particular, the area around the through hole in the main body can be reinforced.

[0055] (6) The reinforcing member is formed in a plate shape, The structure according to any one of (1) to (4), wherein the peripheral surface is joined to the side wall in a state where the main body is fitted into the hollow portion. According to this structure, the main body can be reinforced by the plate-shaped reinforcing member, and in particular, the portion where the reinforcing member is fitted can be reinforced.

[0056] (7) preparing a body portion made of an extruded aluminum material formed into a closed cross-sectional shape having a hollow portion surrounded by side walls, and having through holes penetrating the side walls facing each other; a reinforcing member made of aluminum material is inserted into the hollow portion of the main body; The side wall and the reinforcing member are joined from the outside of the main body portion to form a joint portion that penetrates the side wall and reaches the reinforcing member; A method for manufacturing a structure, wherein a reinforcing member having a thickness equal to or greater than the width dimension of the joint is used as the reinforcing member. According to this method of manufacturing a structure, a reinforcing member made of aluminum is provided inside the hollow portion of a main body made of an extruded aluminum material, and the reinforcing member is joined to the side wall by forming a joint that penetrates the side wall of the main body and reaches the reinforcing member. Furthermore, the reinforcing member has a thickness equal to or greater than the width of the joint. This ensures high strength, and by using aluminum for the main body and reinforcing member, a lightweight structure can be manufactured.

[0057] (8) A method for manufacturing a structure described in (7), in which the side wall and the reinforcing member are joined from the outside of the main body portion by friction stir welding, and a joint is formed that penetrates the side wall and reaches the reinforcing member. According to this method for manufacturing a structure, the side wall of the main body and the reinforcing member are joined by friction stir welding from the outside of the main body, and a joint that penetrates the side wall and reaches the reinforcing member is formed, thereby joining the side wall of the main body and the reinforcing member with high joint strength, thereby making it possible to manufacture a high-strength structure reinforced by the reinforcing member.

[0058] (9) The method for manufacturing a structure according to (7) or (8), wherein the reinforcing member is a member having a thickness at a portion joined to the side wall that is three times or more the thickness of the side wall. According to this manufacturing method for a structure, the thickness of the portion of the reinforcing member that is joined by the joint is at least three times the thickness of the side wall of the main body, thereby increasing the joining strength at the joint. Furthermore, when the side wall of the main body and the reinforcing member are joined by friction stir welding, the pressing force of the shoulder of the friction stir tool can be effectively received by the reinforcing member, allowing the side wall of the main body and the reinforcing member to be smoothly joined.

[0059] (10) The method for manufacturing a structure according to any one of (7) to (9), wherein at least the main body portion is made of an extruded material made of a 7000 series aluminum alloy. According to this method of manufacturing a structure, a structure with even higher strength can be manufactured because the main body is made of an extruded material made of a 7000 series aluminum alloy.

[0060] (11) A cylindrical member having a hole is used as the reinforcing member, The method for manufacturing a structure described in any one of (7) to (10), wherein the reinforcing member is inserted into the hollow portion of the main body portion, and the side wall and the peripheral surface of the reinforcing member are joined in a state where the hole portion is connected to the through hole of the main body portion. According to this method for manufacturing a structure, a structure can be manufactured in which the main body is reinforced by the cylindrical reinforcing member, and in particular, the periphery of the through hole in the main body is reinforced.

[0061] (12) A plate-shaped member is used as the reinforcing member, The method for manufacturing a structure described in any one of (7) to (10), wherein the side wall and the peripheral surface of the reinforcing member are joined in a state where the reinforcing member is fitted into the hollow portion of the main body portion. According to this method for manufacturing a structure, a structure can be manufactured in which the main body is reinforced by a plate-shaped reinforcing member, and in particular, the portion where the reinforcing member is fitted and arranged is reinforced.

[0062] (13) When joining the side wall of the main body and the reinforcing member, a dummy member is arranged in parallel with the main body, and an outer surface of the dummy member is arranged to coincide with an outer surface of the side wall, The joining is started from the dummy member as a starting point, and the joining is performed on the side wall of the main body portion; The method for manufacturing a structure according to any one of (7) to (12), wherein the dummy member is removed after the side wall and the reinforcing member are joined. According to this manufacturing method for a structure, the joining start point on the side wall of the main body can be brought close to the same conditions as the other joining locations, thereby achieving high joining quality. [Explanation of symbols]

[0063] 11 Main body 13 Collar member (reinforcement member) 15 Joint members (reinforcement members) 21 Hollow part 23,25 side wall 27 Through hole 31 Hole 51 Dummy member 100,200 structures C Corner J joint M Base material S Reinforcement member

Claims

1. a main body portion made of an extruded aluminum material, the main body portion having a closed cross-sectional shape with a hollow portion surrounded by side walls, the main body portion having through holes penetrating the side walls facing each other; a reinforcing member made of aluminum material that is disposed inside the hollow portion and reinforces the main body from the inside; and the reinforcing member is joined to the side wall of the main body portion by a joint that penetrates the side wall of the main body portion and reaches the reinforcing member; structure.

2. The portion of the reinforcing member joined by the joint portion has a thickness three times or more the thickness of the side wall. The structure of claim 1 .

3. The main body portion is formed in a rectangular cross section with the four side walls connected together, The corners at the connecting portions of the side walls have a radius of curvature of 1 mm or more and a thickness equal to or greater than the thickness of the side walls. The structure of claim 1 .

4. At least the main body is made of a 7000 series aluminum alloy. The structure of claim 1 .

5. The reinforcing member is formed in a cylindrical shape having a hole, the peripheral surface is joined to the side wall in a state where the hole is inserted into the hollow portion of the main body portion and communicates with the through-hole of the main body portion; A structure according to any one of claims 1 to 4.

6. The reinforcing member is formed in a plate shape, The peripheral surface of the hollow portion of the main body is joined to the side wall in a state where the hollow portion is fitted into the main body. A structure according to any one of claims 1 to 4.

7. a main body made of an extruded aluminum material having a closed cross-sectional shape with a hollow portion surrounded by side walls, the main body having through holes penetrating the opposing side walls; a reinforcing member made of aluminum material is inserted into the hollow portion of the main body; The side wall and the reinforcing member are joined from the outside of the main body portion to form a joint portion that penetrates the side wall and reaches the reinforcing member; As the reinforcing member, a reinforcing member having a thickness equal to or greater than the width dimension of the joint is used. Method for manufacturing the structure.

8. The side wall and the reinforcing member are joined from the outside of the main body by friction stir welding, and a joint portion is formed that penetrates the side wall and reaches the reinforcing member. A method for manufacturing the structure according to claim 7.

9. As the reinforcing member, a member having a portion joined to the side wall and having a thickness three times or more the thickness of the side wall is used. A method for manufacturing the structure according to claim 7.

10. At least the main body portion is made of an extruded material made of a 7000 series aluminum alloy. A method for manufacturing the structure according to claim 7.

11. A cylindrical member having a hole is used as the reinforcing member, the reinforcing member is inserted into the hollow portion of the main body portion, and the side wall and the peripheral surface of the reinforcing member are joined together in a state in which the hole portion is in communication with the through-hole of the main body portion; A method for manufacturing the structure according to claim 7.

12. A plate-shaped member is used as the reinforcing member, the side wall and the peripheral surface of the reinforcing member are joined together in a state in which the reinforcing member is fitted into the hollow portion of the main body portion. A method for manufacturing the structure according to claim 7.

13. When joining the side wall of the main body portion and the reinforcing member, a dummy member is arranged in parallel with the main body portion, and an outer surface of the dummy member is arranged to coincide with an outer surface of the side wall, The joining is started from the dummy member as a starting point, and the joining is performed on the side wall of the main body portion; removing the dummy member after joining the side wall and the reinforcing member; A method for manufacturing the structure according to any one of claims 7 to 12.

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