JPH09228486A - Aluminum alloy member connecting structure and method for forming connecting member - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To obtain an aluminum alloy structure having good corrosion resistance and good design, and to firmly and easily connect aluminum alloy members, thereby enabling connection with a small number of component members. To facilitate the processing of. SOLUTION: Both sides of an intermediate portion of a chord member 5 formed of an aluminum alloy extruded shape member are held by a holding piece 12 of a connecting member 10 for the intermediate portion and fixed by fixing bolts 18. The end connecting member 20 is fixed to the end of the lattice member 6 by welding. The connecting projection 14 provided on the intermediate connecting member 10 and the connecting projection 22 provided on the end connecting member 20 are directly or weldable via an auxiliary member 11 made of an aluminum alloy. connect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for aluminum alloy members and a method for forming the connecting members, and to a connecting element for forming a structure such as a building or a structure with the aluminum alloy members. Is.

[0002]

2. Description of the Related Art Conventionally, as structures such as buildings and structures,
It is generally known that structural members made of steel frame are connected by welding or fixing means such as bolts and rivets.

By the way, in recent years, it has been considered to use a member formed of an extruded aluminum alloy material having good corrosion resistance and good design for a structure such as a building or a structure.

Even when the structure is made of the above-mentioned aluminum alloy members, it is necessary to connect the members together by welding or using fixing means such as bolts and rivets as in the conventional case.

[0005]

However, since the aluminum alloy member requires a technique for welding at the construction site as compared with the steel frame material, it is desired to mainly use mechanical means such as bolts for the work at the construction site. There was a request.

Further, in the conventional construction method, the number of constituent members of the connecting portion is increased, and there is a problem that a lot of time and labor are required for work at the site. In particular, it is actually difficult to connect and connect another member to the intermediate portion of the connected member, and it has not been easy to connect a plurality of members to the same portion.

The present invention has been made in view of the above circumstances, and provides a connection structure of aluminum alloy members which makes the connection of aluminum alloy members strong and easy and enables connection with a small number of constituent members, and at the same time, processes the same. It is an object of the present invention to provide a method for forming a connecting member that facilitates the formation.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 is a connecting structure for connecting first and second members to be connected, which are formed of an extruded aluminum alloy profile. And a weldable intermediate connecting member that holds both sides of the first connected member at the intermediate portion of the first connected member and is fixed by fixing means, and a second connected member. And an end connecting member fixed to the end by a fixing means is bolted directly or through a weldable aluminum alloy auxiliary member.

In the present invention, the intermediate connecting member is provided with a pair of holding pieces for holding both sides of the first connected member and a connecting projecting piece, and the end connecting member has a second connecting piece.
It is preferable to provide the fixing portion fixed to the end of the member to be connected and the connecting projection.

As the connecting member for the intermediate portion, a pair of holding pieces for holding both sides of the connected member are provided, one holding piece is provided with a forked portion, and the other holding piece is provided between the forked portions. It is preferable to provide a projecting portion to be inserted into the (claim 3).

Further, a concave or convex portion is provided on both outer surfaces of the member to be connected, and a fitting convex portion or a fitting concave portion which is fitted to the concave or convex portion is formed on the connecting member for the intermediate portion. It is also possible to provide (claim 4), or to form an uneven line portion on the outer peripheral surface of the member to be connected at appropriate intervals, and selectively connect the uneven line part to the connecting member for the intermediate portion. It is also possible to provide a mating engaging portion (claim 5).

According to a sixth aspect of the present invention, there is provided a connection structure of an aluminum alloy member for abutting and fixing a column constituent member formed of an aluminum alloy extruded shape member and a base. A fixing member having a fixing receiving portion that is fitted and fixed to an end portion of the material is fixed to the pillar component connecting surface of the base, and a welding projection is provided on the outer peripheral surface of the fixing receiving portion in the cross direction. Characterize.

The fixing method using the fixing means includes, for example, a fixing method using a fixing member such as welding and bolts and rivets. Further, the method of connecting the intermediate part connecting member and the end part connecting member includes, for example, a fixing method such as welding or a fixing member such as a bolt or a rivet.

According to a seventh aspect of the present invention, when the second connected member is connected to an intermediate portion of the first connected member formed of an aluminum alloy extruded profile, the first connected member is A method of molding an intermediate portion connecting member attached to an intermediate portion, the method comprising cutting an aluminum alloy extruded profile having a connecting projection on opposite outer surfaces of a hollow base into a predetermined length, and the hollow base portion. And a step of separating and cutting the opposite side walls of the two into a bifurcated part and a projecting part inserted between the bifurcated parts.

In the present invention, the first connected member means a member for connecting another connected member to the intermediate portion, and the second connected member connects another connected member to the end portion. It refers to the member that does.

According to the first aspect of the invention, the intermediate portion connecting member fixed to the intermediate portion of the first connected member made of aluminum alloy, and the end portion of the second connected member made of aluminum alloy. It is possible to facilitate the connection at the intermediate portion of the connected member by connecting the end portion connecting member fixed to the bolt to the bolt or the rivet directly or through the weldable aluminum alloy auxiliary member. .

According to the sixth aspect of the present invention, a fixing member having a fixing receiving portion which is fitted and fixed to an end portion of the pillar constituent member by fixing means is fixed to the pillar constituent member coupling surface of the base,
By providing the welding projection piece in the cross direction of the outer peripheral surface of the fixed receiving portion, the pillar component can be vertically fixed to the upper surface of the base, and the reinforcing member can be welded to the welding projection piece. Therefore, the connection of the pillar components can be strengthened.

According to the seventh aspect of the present invention, the hollow base is opposed to the hollow base after or before cutting the aluminum alloy extruded profile having the connecting projections on the opposite outer surfaces of the hollow base to a predetermined length. By separating both side walls into a bifurcated part and a projecting part inserted between the bifurcated parts,
Two connecting members can be molded at the same time. Therefore, the material can be reduced and the molding operation can be made efficient.

[0019]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram showing an example of the structure of the present invention.

The above-mentioned structure is erected between the pillar-shaped members 2 having a rectangular cylindrical shape as a plurality of first members to be connected, which are vertically fixed (fixed) on the upper surface of the base 1. It is composed of a pillar body 4 made of a lattice member 3 which is a second member to be connected, and a beam member 7 connected to the pillar constituent member 2. The beam member 7 is composed of a cylindrical chord member 5 as a first member to be connected and a lattice member 6 as a second member to be connected, which is installed between the string members 5. In FIG. 1, reference numeral 6a indicates the direction.

The pillar-constituting material 2, the lattice material 3, the chord material 5 and the lattice material 6 are formed of extruded aluminum alloy profiles. Further, the chord member 5 of the beam member 7 and the lattice member 6 are connected to each other via the connecting member 10 for the intermediate portion and the connecting member 20 for the end portion, and the column constituent member 2 of the pillar body 4 and the chord member 5 of the beam member 7. The base 6a is connected to the connecting member 10 using the intermediate connecting member 10 and the end connecting member 20. In addition, the pillar constituent material 2 of the pillar body 4
Is vertically fixed (fixed) on the base 1 via the fixing member 30.
Have been.

Next, the connection structure (portion A in FIG. 1) of the pillar 4 and the beam 7 of the structure will be described in detail. First, the chord member 5 and the lattice member 6 of the beam member 7 are, as shown in FIGS. 2 and 3, two intermediate connecting members 10 fixed to the chord member 5.
And an end connecting member 20 fixed to the end of the lattice member 6.
And the end connecting member 20 is connected to the end connecting member 20 via the auxiliary member 11 that is fixed in advance by welding.

In this case, as shown in FIGS. 2, 4 and 5, the intermediate portion connecting member 10 includes a base portion 13 having a U-shaped cross section, which has a pair of holding pieces 12 for holding both sides of the chord member 5. ,
It is composed of a substantially dovetail-shaped connecting projection 14 protruding outward from the center of the base portion 13. One holding piece 12 is provided with a forked portion 15, and the other holding piece 12 is provided with a forked portion. Protrusions 16 that are inserted between the protrusions 15 are provided, and the bifurcated portions 15 and the protrusions 16 alternately face each other. In addition,
A mounting hole 17 is formed in each of the bifurcated portion 15 and the protruding portion 16. The intermediate portion connecting member 10 thus configured is, for example, a weldable aluminum alloy non-porous die casting (JIS ADC12-F, ADC12-T).
6) Aluminum alloy extruded profile (JIS A6061, A5000) that can be formed or welded
System) is processed by the molding method described later.

The two intermediate connecting members 10 constructed as described above hold the chord member 5 between the holding pieces 12 and engage the forked portion 15 and the protruding portion 16 with each other. It is attached to the chord member 5 and fixed by a fixing bolt 18 or a blind rivet 18a or a blind nut (not shown) (see FIG. 4).

In the above description, the base member 13 of the connecting member 10 for the intermediate portion has a U-shaped cross section because the chord member 5 has a round pipe shape. However, it is not necessary that the base member 13 has a U-shaped cross section. When 5 is a square bar, etc., as shown in FIG.
It is better to form 3 in a U-shaped cross section. Further, the connecting projection 14 does not necessarily have to have a substantially dovetail shape, and may have a rectangular shape as long as it can obtain the required bonding strength.

On the other hand, the end connecting member 20 is a sleeve-shaped base portion 21 which is attached to the end portion of the lattice member 6 and fixed by fixing means such as welding, and projects outward from the sleeve-shaped base portion 21. It is composed of a connecting projection 22. The end connecting member 20 configured in this manner is, for example, a weldable non-porous die cast aluminum alloy (J
IS ADC12-F, ADC12-T6).

The auxiliary member 11 welded to the connecting projection 22 of the end connecting member 20 is formed of a weldable plate member made of, for example, an aluminum alloy (JIS A6061, A5000 series, etc.). There is. This auxiliary member 11
May have a flat plate shape, or may be bent depending on the connection angle between the chord member 5 and the lattice member 6 (see FIG. 3).
The auxiliary member 11 is fixed to the connecting projection 22 of the end connecting member 20 by welding in advance, so that the intermediate connecting member 1 is formed.
It is superposed on the connecting projection 14 of 0 and is fixed by bolts or rivets 19. Therefore, this auxiliary member 1
In the case of connecting the chord member 5 and the lattice member 6 by using 1, the auxiliary member 11 can be formed according to the structure of the connecting portion without preparing various sizes and shapes of the connecting member 10 for the intermediate portion and the connecting member 20 for the end portion. By simply making various preparations, a sufficient strength can be obtained and a connection structure can be obtained, and the connection between the chord material 5 and the lattice material 6 can be ensured.

In the above description, the case where the intermediate portion connecting member 10 and the end portion connecting member 20 are connected via the auxiliary member 11 has been described, but the connecting projection 14 and the end of the intermediate portion connecting member 10 are described. It is also possible to directly connect the connecting projection 22 of the part connecting member 20 with a fixing means such as a bolt or a rivet.

Next, the connecting structure of the support 6a connected between the column 4 and the beam 7 will be described. In this connection, the end connecting member 20 may be used to connect to the end of the bearing 6a in the same manner as in the above-described connection of the lattice members. An example of connection between the upper end of the tine 6a and the chord member 5 of the beam member 7 is shown on the lower side of FIG. In the case shown in FIG. 2, the lattice member 6 of the beam member 7 and the support 6a are described above, and as shown in FIG. 4, the bifurcated portion of the connecting member 10 for the intermediate portion, which is attached above and below the chord member 5, as shown in FIG. Since the 15 and the protruding portion 16 are engaged with each other and coupled, it is possible to couple a plurality of second members to be coupled (lattice material, bearing) at the same portion.

The column member 2 of the column body 4 and the chord member 5 of the beam member 7
As shown in FIG. 7, in connecting the end portions of the members to each other, the end connecting member 20A fixed to the end of the pillar component 2 and the end of the chord member 5 as shown in FIG. The end connecting member 20B fixed to the end is connected to the end connecting member 20A via the auxiliary member 11 fixed by welding. In this case, the auxiliary member 11 and the end connecting member 20B are attached with bolts 19.

The end connecting member 20A fixed to the end of the pillar component 2 is similar to the end connecting member 20 fixed to the end of the lattice member 6 described above. It is composed of a sleeve-shaped base portion 21A which is attached to the end portion and fixed by a fixing means such as welding, and a connecting projection 22A which projects outward from the sleeve-shaped base portion 21A. Further, an end connecting member 20B fixed to the end of the chord member 5
Also, since it is configured similarly to the above-mentioned end portion connecting member 20, the same portions are denoted by the same reference numerals and the description thereof will be omitted.
End connecting members 20A, 20B configured in this way
Is made of a non-porous die-cast member made of aluminum alloy that can be welded similarly to the end connecting member 20.

In the above description, the case where the end connecting member 20A is fixed to the end of the pillar component 2 by a fixing means such as welding has been described, but the fixing means does not necessarily have to be welding, and FIG. As shown in FIG. 4, fixing with bolts 23 may be used, or fixing with rivets, and further, the sleeve-shaped base portion 21A may be abutted on the end portion of the pillar constituent member 2 without being attached and fixed by friction welding. Is also possible. This fixing method is performed by fixing the end connecting member 20 and the end of the lattice member 6 and connecting the end connecting member 20B and the chord member 5 to each other.
It can also be applied to fixing to the end of.

In the above description, the end connecting member 20 is used.
A has been described as being fixed to the end portion of the prismatic columnar component 2, but when the columnar component 2 has a columnar shape, the end portion connecting member 20 of the columnar component 2 is adjusted according to the cross section of the columnar component 2. The sleeve-shaped base portion 21A may be formed in a cylindrical shape (see FIG. 9A). Further, the connecting projection 22A may have a flat plate shape, or may have a cross shape as shown in FIG. 9B. By thus forming the connecting projection 22A in a cross shape, the number of connecting points can be increased. Furthermore, the top of the sleeve-shaped base portion 21A may be formed by the spherical surface 24 as shown in FIG. 9 (c). In this way, the strength can be improved by forming the top surface of the sleeve-shaped base portion 21A into the spherical surface 24.

In the above description, the end connecting member 20A fixed to the end of the pillar component 2 has been described.
The other end connecting members 20 and 20B can be similarly configured.

Next, the connecting structure of the base 1 and the pillar 4 will be described. The base 1 and the pillar constituent material 2 of the pillar body 4 are connected to the base member 1 which is the base via a fixing member 30 fixed by, for example, welding.

In this case, as shown in FIG. 10, the fixing member 30 includes a square tube-shaped fixing receiving portion 31 into which the lower end portion of the pillar constituting member 2 is fitted and fixed by a fixing means such as a bolt 33, and the fixing member 30. The receiving portion 31 is composed of a welding protrusion 32 that protrudes in the cross direction from the center of each side. The fixing member 30 is formed of a weldable aluminum alloy non-porous die cast member or an aluminum alloy extruded profile, like the intermediate portion connecting member 10 and the end connecting members 20, 20A, 20B. Has been done. The fixing member 30 configured as described above is fixed to the lower end portion of the pillar constituent material 2, and the pillar constituent material 2 is vertically fixed. The pillar component 2 is fixed by welding the fixing member 30 to the three-sided welding protrusions 32 and the triangular plate-shaped reinforcing bracket 34 which is hung on the base member 1. A reinforcing plate 35 that connects the fixing members 30 of the two pillar constituent members 2 to each other is fixed by welding to the welding protrusions 32 provided on the opposite sides of the pillar constituent member 2. A triangular plate-shaped reinforcing bracket 34 is fixed to the intermediate portion 35 by welding to reinforce the columnar body 4. 36 is a bolt hole for bolting the base member to the foundation.

As described above, the fixing member 3 is provided on the upper surface of the base 1.
The column member 4 can be formed by vertically fixing the pillar constituent material 2 via 0 and connecting the lattice material 3 between the pillar constituent materials 2.

Further, the connecting member 1 for the intermediate portion is provided in the middle of the chord member 5.
0, and at the same time, the end connecting member 20 is fixed to the end of the lattice member 6 of the beam member 7.
The beam member 7 is formed by connecting the connecting protrusion 14 of 0 and the connecting protrusion 22 of the end connecting member 20 directly or via the auxiliary member 11 fixed in advance to the connecting protrusion 14 by welding. Composed. The end connecting member 20A fixed to the upper end of the pillar component 2 of the pillar 4 and the end connecting member 20B fixed to the end of the chord member 5 are connected directly or to the end connecting member 20. It is possible to form the structure by connecting the pillar body 4 and the beam member 7 by connecting through the auxiliary member 11 fixed to. In the above example, the pillar 4 having the truss-assembled structure is formed by the pillar constituent material 2 and the lattice material 3, but the pillar body may be formed by only one pillar constituent material.

In the above embodiment, the intermediate portion connecting member 10 is used.
Although the case where the middle part of the chord member 5 is simply held between the holding pieces 12 has been described, the holding member does not necessarily have to be such a holding form, and as shown in FIG.
5a are provided on both sides of the fitting, and the holding piece 12 of the connecting member 10 for the intermediate portion has a fitting projection 12a which fits into the recess 5a.
11B, or as shown in FIG. 11B, the ridge portions 5b are provided on both sides of the chord member 5, and the holding piece 1 of the intermediate portion connecting member 10 is provided.
2 is provided with a fitting concave portion 12b which fits in the convex stripe portion 5b, so that the intermediate portion connecting member 10 is provided at the intermediate portion of the chord member 5.
Can be firmly and reliably fixed. Two connecting projections 14 may be provided in parallel as shown by an imaginary line in FIG.

As shown in FIG. 11 (c), the chord member 5
Uneven portions 5c are formed on the outer peripheral surface of the intermediate portion at appropriate intervals, and the holding piece 12 of the connecting member 10 for the intermediate portion has the uneven portion 5c.
By providing the engaging portion 12c that selectively and selectively engages, the intermediate portion connecting member 10 can be fixed to the chord member 5 at an appropriate angle, and the chord member 5 and the beam member 7 can be fixed. It can be connected to the lattice member 6 at a predetermined angle.

Next, an example of a method of forming the intermediate portion connecting member 10 will be described with reference to FIG. To form the connecting member 10 for the intermediate portion, first, for example, the extruded shape member 40 (material) made of an aluminum alloy having the connecting protrusions 14 on the opposing outer surfaces of the rectangular hollow base 41 is formed.
Next, the material 40 is cut into appropriate sizes (see FIG. 12).
(A)). At this time, the connecting projection 14 is cut into a dovetail shape or a rectangular shape depending on the purpose of use. After cutting the material 40, the opposite side walls 42 of the hollow base 41 are irradiated with a laser beam, for example, from a nozzle 43a of a laser cutting machine 43, or by pressing or the like, and the bifurcated portion 15 and the bifurcated portion 15, respectively. The protruding portion 1 that can be inserted between the portions 15
It is cut so that it can be separated into 6 and 6 (see FIG. 12 (b)). At this time, the opposite side walls 42 of the hollow base portion 41 are cut so that the bifurcated portions 15 and the projecting portions 16 alternate in positional relationship. The two pieces thus cut can be separated and used as the intermediate portion connecting member 10 (see FIG. 12C). When molding the base 13 having a U-shaped cross section, the hollow base 41 may have an elliptical cross section. Before cutting the material 40, it may be separated by a laser beam or the like as described above.

As described above, the aluminum alloy extruded profile 40 (material) having the pair of connecting projections 14 on the opposing outer surfaces of the hollow base 41 is cut into a predetermined size, and both side walls 42 of the hollow base 41 are cut. Can be separately cut into the bifurcated portions 15 and the projecting portions 16 inserted between the bifurcated portions 15, so that the two intermediate portion connecting members 10 can be simultaneously formed from one material 40. it can.

[0043]

As described above, by using the connecting structure of the present invention, it is possible to obtain a structure on an aluminum alloy material having good corrosion resistance and good design, and 1) Claims 1 to 3. According to the invention, the connecting member for an intermediate portion fixed to the intermediate portion of the first connected member made of aluminum alloy and the end portion fixed to the end portion of the second connected member made of aluminum alloy. Since the connecting member is connected directly or via the weldable aluminum alloy auxiliary member, the connection of the intermediate portion of the connected member can be facilitated and the connecting work can be performed efficiently.

2) According to the invention as set forth in claim 4, a recessed portion or a protruding portion is provided on both outer surfaces of the member to be connected, and the connecting member for the intermediate portion is fitted into the recessed portion or the protruding portion. Since the fitting convex portion or the fitting concave portion is provided, in addition to the above 1), more reliable connection can be achieved.

3) According to the invention as defined in claim 5, the ridges and valleys are formed on the outer peripheral surface of the member to be connected at appropriate intervals, and the ridges and grooves are selectively engaged with the connecting member for the intermediate portion. Since the engaging portion is provided, it is possible to easily connect the members to be connected at an arbitrary angle in addition to the above 1).

4) According to the invention as set forth in claim 6, a fixing member having a fixing receiving portion which is fitted and fixed to an end portion of the aluminum alloy pillar constituent member by fixing means is fixed to the pillar constituent member connecting surface of the base. However, by providing the welding projection piece in the cross direction of the outer peripheral surface of the fixed receiving portion, the pillar constituent material can be erected and fixed on the upper surface of the base, and the reinforcing member can be welded to the welding projection piece. As a result, it is possible to strengthen the connection between the pillar constituent materials.

5) According to the invention described in claim 7, the aluminum alloy extruded profile having the connecting projections on the opposite outer surfaces of the hollow base is cut into a predetermined length, and then the both sides of the hollow base opposite to each other are cut. Since the wall is separated and cut into a bifurcated part and a projecting part that is inserted between the bifurcated parts, two connecting members can be molded at the same time, and the material can be reduced and the molding work can be performed. The efficiency of can be improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an example of a structure using a connection structure of the present invention.

FIG. 2 is an enlarged side view of a portion A in FIG.

3 is a cross-sectional view taken along the line BB of FIG.

FIG. 4 is an exploded perspective view showing a mounting state of the intermediate portion connecting member in the present invention.

FIG. 5 is a front view (a), a left side view (b) and a right side view (c) of the intermediate portion connecting member.

FIG. 6 is a front view (a) of another example of the intermediate portion connecting member,
It is the left side view (b) and the right side view (c).

FIG. 7 is an enlarged side view of portion B in FIG.

FIG. 8 is a partially cutaway perspective view showing an example of an end connecting member according to the present invention.

FIG. 9 is a perspective view showing another example of the end connecting member.

10 is an enlarged side view (a), a plan view (b) and a perspective view (c) of a fixing member of a C portion of FIG. 1. FIG.

FIG. 11 is a cross-sectional view showing another attachment state of the intermediate portion connecting member and the string member in the present invention.

FIG. 12 is an explanatory view showing an example of a processing procedure of the method for molding a connecting member of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base (base member) 2 Column component material (1st connected member) 3 Lattice material (2nd connected member) 5 Chord material (1st connected member) 5a Recessed part 5b Projected part 5c Concavo-convex Strip 6 Lattice material (second connected member) 10 Intermediate connecting member 11 Auxiliary member 12 Holding piece 12a Fitting convex portion 12b Fitting concave portion 12c Engaging portion 14 Connecting protrusion 15 Bifurcated portion 16 Projecting portion Part 18 Fixing bolt (fixing device) 18a Blind rivet (fixing device) 20, 20A, 20B End connecting member 21, 21A, 21B Sleeve-shaped base 22, 22A, 22B Connecting projection 23 Bolt (fixing device) 30 Fixing Member 31 Fixed receiver 32 Welding protrusion 33 Bolt (fixing means) 34 Reinforcing bracket 35 Reinforcing plate 40 Material (aluminum alloy extruded shape member) 41 Hollow base 42 Side wall 43 Ray Cutting machine

Claims (7)

[Claims] 1. A connection structure for connecting first and second connected members to each other, which is formed of an extruded aluminum alloy profile, wherein the first connected member is at an intermediate portion of the first connected member. Directly holding the weldable intermediate part connecting member fixed by the fixing means and the end connecting member fixed by the fixing means to the end of the second connected member while holding both sides of the Alternatively, the connection structure of the aluminum alloy member is characterized in that the aluminum alloy member is bolted through a weldable aluminum alloy auxiliary member. 2. The aluminum alloy member connecting structure according to claim 1, wherein the intermediate connecting member includes a pair of holding pieces for holding both sides of the first connected member, and a connecting projection. A connecting structure for an aluminum alloy member, wherein the connecting member for an end portion is provided with a fixing portion fixed to an end portion of a second member to be connected and a connecting projection. 3. In an aluminum alloy member connecting structure, when a second connected member is connected to an intermediate part of a first connected member, an intermediate part used as an intermediate part of the first connected member. The connecting member for use is provided with a pair of holding pieces for holding both sides of the first connected member, one holding piece is provided with a bifurcated portion, and the other holding piece has a shape inserted between the bifurcated portions. A connecting structure for aluminum alloy members, characterized in that a protrusion is provided. 4. The aluminum alloy member connecting structure according to claim 1 or 3, wherein a concave streak or a convex streak is provided on both outer surfaces of the first member to be connected, and the intermediate part connecting member has the above-mentioned structure. A connecting structure for aluminum alloy members, characterized in that a fitting convex portion or a fitting concave portion that fits in the concave portion or the convex portion is provided. 5. The aluminum alloy member connecting structure according to claim 1, wherein the first and second members to be connected are provided with uneven portions at appropriate intervals on the outer peripheral surface thereof, and the connecting member for the intermediate portion is formed. Is a connection structure of aluminum alloy members, characterized in that an engaging portion that selectively engages with the uneven strip portion is provided. 6. A connection structure of aluminum alloy members for abutting and fixing a pillar constituent material formed of an aluminum alloy extruded shape member on a base, the fixing means being fitted to an end portion of the pillar constituent material. A fixed member having a fixed receiving portion to be inserted and fixed is fixed to a pillar component connecting surface of the base, and an aluminum alloy characterized in that a welding projection is provided in a cross direction of an outer peripheral surface of the fixed receiving portion. Connection structure of members. 7. An intermediate member attached to an intermediate portion of a first connected member when connecting a second connected member to an intermediate portion of a first connected member formed of an aluminum alloy extruded shape member. A method for forming a connecting member for a part, the step of cutting an aluminum alloy extruded profile having a connecting projection on the opposing outer surfaces of the hollow base to a predetermined length, and the two opposite side walls of the hollow base. , With bifurcated parts,
And a step of separating and cutting into a projecting part inserted between the bifurcated parts.