JPH10227099A - Bent structure for structural material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structural material including a beam and a column for a building having a sectional H- or I-shape capable of precisely forming a bent structure with a desired angle. SOLUTION: In a bent structure 1 for a structural material 2, the structural material 2 is formed as a sectionally H-shaped beam with a pair of parallel flanges 4, 5 and webs 6 to tie them. An approximately triangular cutout 8 is formed in one flange 5 and the web 6 in all cross direction. The other flange 4 adjacent thereto is bent to provide a corner 10, where both of one flanges 5 and both of the webs 6 located on both sides of the cutout 8 have mutual face contact. The webs 6 located on both sides of the corner 10 and connecting plates 12, 14 have mutual face contact across one flange 5 to join the connecting plate 12 to the web 6 and the connecting plate 14 to the flange 5 with bolts 16 and nuts 18. If an aluminum alloy extrusion shaping material is used for the structural material 2, the structural material 2 and a whole building structural material are made lighter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bent structure of a structural material or a semi-structural material of a building beam, a pillar, a joint palm, or the like having a H-shaped or I-shaped cross section, or other structures.

[0002]

2. Description of the Related Art In general, a bent structure of a structural material such as a beam for a building having a H-shaped or I-shaped cross section is shown in FIG.
As shown in (B), for example, a bent structure 200 for forming a ridge of a building is formed by joining a pair of beams 202 having a cross section H made of a shape steel and having an inclined end face to each other while inclining each other. The connecting plate 212 is brought into surface contact over both surfaces of the web 204, and the substantially rectangular connecting plate 214 is brought into surface contact over the inner surfaces of the upper and lower flanges 206. A nut 218 is fastened and connected to a threaded portion of a bolt 216 that penetrates through 204 or each flange 206 in a staggered manner.

[0003] In this structure 200, it is necessary to cut the end face of each beam 202 made of a heavy section steel at a required angle in a factory and to drill many bolt holes with high precision. In addition, at the factory or site, the end faces of the beams 202 are kept at a required angle, and the connection plates 21
In order to set a large number of bolts 216 through the bolts 216 and fasten the nuts 218 while setting them at predetermined positions, it takes a lot of skill and time for construction, and the work is dangerous because of heavy weight.

[0004] A bent structure 2 shown in FIGS.
Reference numeral 20 designates a pair of beams 222 as structural materials which are similarly inclined with each other and abut against each other. Then, a nut 234 is fastened and connected to each screw portion of a bolt 232 penetrating the pair of connecting pieces 230 and the web 224 sandwiched therebetween. Also in this structure 220, the end faces of the beams 222 made of shaped steel are brought into a state of abutting at a required angle,
The connection piece 230 is set at a predetermined position, and the bolt 23
In order to fasten the nut 234 to 2, the assembly and construction required skill and time.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and enables a bent structure of a structural material having a desired bending angle to be formed as accurately as possible in a factory. An object of the present invention is to provide a bent structure of a structural material that shortens the time and also reduces the weight of the structural material.

[0006]

According to the present invention, in order to solve the above-mentioned problems, a bent structure in a structural material is constituted by one structural material, and this structural material is bent, and a connecting plate or a structural material is formed at a corner portion thereof. This is obtained by conceiving the connection of the flanges of themselves with bolts and nuts. In this specification, it is assumed that the structural material having the I-shaped cross section is also included in the structural material having the H-shaped cross section. That is, the bent structure of the structural material of the present invention is such that, in a structural material having a H-shaped cross section composed of a pair of parallel flanges and a web connecting them, one flange and the other flange are crossed over substantially the entire width of the web. By forming a substantially triangular cutout portion and bending the other flange, a corner where one of the flanges located on both sides in the longitudinal direction of the structural material in the cutout portion and the web are brought close to each other. The connecting plate is brought into surface contact with the web and / or one of the flanges located on both sides of the corner portion, and the connecting plate and the web and / or the one flange are joined by bolts and nuts. It is characterized by the following.
According to this structure, a bent structure having a precise bending angle can be formed in one structural material by forming the cutout portion with high precision.

[0007] Further, the substantially triangular cutout is made asymmetric with respect to the longitudinal direction of the structural material, and a step is provided between one of the flanges adjacent to each other when bent, and both sides of the step are formed. The connecting plate is brought into surface contact with the inner surface of one flange and the outer surface of the opposite flange,
A bent structure in which the connection plate and the flanges that are in surface contact with the connection plate are connected by bolts and nuts is also included. According to this structure, the structural material can be inclined at an arbitrary angle on the way.

Further, the bent structure of the other structural material of the present invention is a structural material having a H-shaped cross section composed of a pair of parallel flanges and a web connecting them, through a slit provided in one flange. Forming a substantially triangular cutout portion while leaving the other flange over substantially the entire width of the web, and bending the other flange so that the cutout portion is located on both sides in the longitudinal direction of the structural material. A corner portion where one of the flanges and the web are brought close to each other is provided, and a overlapped portion in which a flange piece protruding from one side of the one flange in the notch portion is overlapped on the opposite flange across the notch portion. Connected by bolts and nuts, or bend a pair of flange pieces projecting substantially symmetrically from both sides of one of the flanges in the notch. And wherein the bound by bolts and nuts mutually polymerized polymerization unit. According to this structure, a bent structure having an accurate bending angle can be easily formed with one structural material, and the assembling work on site can be eliminated, and the connection plate is eliminated or formed with a small number of connection plates. It becomes possible.

[0009] The present invention also includes a bent structure in which the overlapping portion is located inside an inner corner of the corner portion or protrudes outside the inner corner. According to the former, it is possible to form a bent structure excellent in design.
The bent structure in which the substantially triangular cutout includes a circular cutout adjacent to the other flange is also included. This facilitates the bending and can provide a corner part that is excellent in appearance. The circular shape includes an oval shape, an elliptical shape, and an oval shape. Further, a bent structure in which the structural material having the H-shaped cross section is made of an extruded material made of an aluminum alloy is also included. According to this, the weight of the structural material can be reduced to approximately half the weight while maintaining the same strength as the conventional shaped steel, and the above-mentioned bent structures can be easily formed, and the on-site construction can be performed quickly and safely. It is possible to do.

[0010]

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 relates to a bent structure 1 according to one embodiment of the present invention. As shown in FIGS. 1A and 1B, for example, a structural member 2 having a H-shaped cross section is a pair of upper and lower parallel flanges 4. 5 and a vertical web 6 connecting these flanges 4, 5 at their center. This structural material 2 includes aluminum alloys (JIS A6063T5 or T6,
Extruded sections made of A6N01-T5 or T6, A7003-T5, A7N01-T5 or T6) can also be used. A corner 10 bent at a desired angle is formed in the middle of the structural material 2 by bending at notches 8 and 9 described below, which are formed across the entire width of the flange 5 and the web 6. A rectangular connecting plate 12 is brought into surface contact with both side surfaces of the corner portion 10 across the webs 6 on both sides thereof.
8 is screwed. Further, the connecting plates 14 having a substantially rectangular shape are brought into surface contact with the inner surfaces thereof across the lower (one) flanges 5, 5, and the nuts 18 are screwed to the bolts 16 penetrating therethrough, respectively. This is a bent structure 1.

The bent structure 1 is formed as follows.
As shown in FIG. 1 (C), in the middle of the structural material 2 in advance,
A substantially triangular notch 8 is formed over the entire width of the lower (one) flange 5 and the web 6, and an upper portion is formed at the upper portion thereof.
A circular cutout 9 in contact with the (other) flange 4 is partially overlapped. When a not-shown core rod is inserted into the notch 9 and both sides of the structural material 2 in the longitudinal direction are bent in the directions of arrows in the figure, the upper flange 4 left by the notches 8 and 9 is rounded. Fig. 1
A corner portion 10 bent at a desired angle as shown in FIG. In this case, the cut surfaces of the flanges 5 and the webs 6 located on both sides of the notch 8 are in close contact with each other. The notch 9 is used to facilitate the bending process and prevent the web 6 near the flange 4 from being distorted and projecting in the thickness direction at that time.
Note that a core rod may not be used in the above bending.

As shown in FIG. 1 (D), a plurality of through holes 7 are provided symmetrically in the web 6 on both sides of the corner portion 10 and a plurality of through holes are provided in the flanges 5 on both lower sides. 5a, each of which is formed by drilling, straddles the webs 6, 6 and makes the rectangular connecting plates 12 come into surface contact on both sides thereof. 14 is brought into surface contact. A through hole (not shown) is formed in the connection plate 12 and a through hole 15 is formed in the connection plate 14 in advance.
The connection plate 12 and the web 6, and the connection plate 14 and the flange 5 are respectively connected by inserting bolts 16 into the through holes 7, 5a and the like, and screwing nuts 18 into the screw portions. The bent structure 1 of the structural material 2 shown in FIGS. 1A and 1B is obtained.

According to the bending structure 1 of the structural material 2 as described above, the bending angle can be freely set by selecting the notch angle θ of the notch 8 formed in one structural material 2. At the same time, by adjusting the notch angle θ, it is possible to finely adjust the bending angle, and the accurate bending structure 1 can be obtained easily and quickly. Moreover,
By using an extruded shape of an aluminum alloy for the structural material 2, the structural material 2 itself can reduce the weight of the entire structural material of the building as well as the base material, and facilitates the construction work at the time of forming the bent structure and on-site, And it can be made safe.

FIG. 2 relates to a bent structure 20 of a different form. Note that the same reference numerals are used for the same parts as described above. As shown in FIGS.
Is one flange 5 and web 6 of the same structural material 2
By cutting only the left side in FIG. 2 (A) at notches 8 'and 9 described later formed over the entire width of
A corner portion 22 formed at a desired angle is formed in the middle of the structural material 2. The lower (one) flanges 5 at the corners 22 are vertically displaced from each other, so that a step portion 24 is provided between them. A substantially rectangular connecting plate 26 is disposed so as to be in contact with either the inner surface or the outer surface of each flange 5 on both sides of the stepped portion 24, and the bolt 16 passes through the connecting plate 26 and each flange 5. The nut 18 is screwed onto the threaded portion to form a bent structure 20.

The bent structure 20 is formed as follows. As shown in FIGS. 2 (C) and 2 (D), in the middle of the structural material 2, an asymmetrical substantially triangular shape is formed along the longitudinal direction of the beam 2 over the entire width of the lower (one) flange 5 and the web 6. A notch 8 'having a shape is formed. In addition, the upper part
A circle having a center O at a position in contact with the (other) flange 4 and deviated by a distance of “tan θ × r” to the left from an extension of a vertical side 8 ″ of a notch 8 ′ orthogonal to the flange 4. The cutouts 9 having a shape are continuously formed. Here, θ is the bending angle, and r is the radius of the notch 9. Then, a core rod (not shown) is inserted into the cutout 9,
Only the left side in the longitudinal direction of the structural material 2 is bent in the direction of the arrow in FIG. Then, the upper flange 4 left by the notches 8 'and 9 is gently bent in an arc shape, and a corner 22 bent at a desired angle θ as shown in FIG. 2A is formed. In this case, the cut surfaces of the webs 6 located on both sides of the cutout 8 ′ make substantially surface contact with each other, but the left and right cut surfaces of one flange 5 are shifted up and down to form a stepped portion 24.

A connection plate 26 having a substantially rectangular shape at the stepped portion 24 is brought into surface contact with the inner surface of the left flange 5 and the outer surface of the right flange 5, respectively. When the nut 18 is screwed into the screw portion and the respective flanges 5 and the connection plate 26 are connected, as shown in FIG.
The bent structure 20 of the structural material 2 shown in FIG. According to the bent structure 20, for example, when the structural material 2 is used as a beam which is symmetrically inclined with respect to the notch 9 as a center, a load from the vertical direction is abutted between the webs 6 at the corner 22. Since it acts in a direction away from the stepped portion 24, these portions do not open or come off, and exhibit high strength against such a load. In addition, by using an extruded aluminum alloy material as the structural material 2, it is possible to achieve the same weight reduction and safety of the work as described above. It should be noted that the circular cutout 9 is more easily bent if it is formed in an oblong or elliptical shape oriented horizontally. Further, the connecting plate 12 in FIG. 1 may be similarly used on both sides of the web 6 of the structural material 2 in FIG.

FIG. 3 relates to a bent structure 30 of still another form of the present invention. As shown in FIGS. 9A and 9B, the bent structure 30 is formed by bending at notches 34 and 35 described later formed over the entire width of the web 6 of the same structural material 2 as described above. A corner portion 31 bent at a desired angle is formed in the middle of the structural material 2, and a flange piece 38 projecting from one (left) flange 5 below the corner portion 31 is formed in the opposite flange 5. The overlapping portion 39 is formed by superimposing on the side surface or the outer surface, and the overlapping portion 39 is connected by the bolt 16 and the nut 18.

The bent structure 30 is formed as follows. First, as shown in FIG. 3C, a slit 32 is formed in the flange 5 below (one side) of the structural material 2, and a substantially triangular shape having the slit 32 as one corner in the web 6 through the slit 32. A cutout portion 34 is formed, and a circular cutout portion 35 that is in contact with the upper (other) flange 4 is formed continuously above the cutout portion 34. A projecting portion 36 of the flange 5 projecting rightward in FIG.
Is formed. As shown in FIG. 3 (D), the protruding portion 36 is symmetrically divided on both sides by a groove 37 near the web 6, and the base end side thereof is bent into a substantially rectangular shape, and the protruding portion 36 is formed on the distal end side. A flange piece 38 is formed. At the lower part of the web 6 adjacent to the flange pieces 38, a horizontal cutout 34 'is formed to facilitate the above-mentioned substantially bent shape.

When a not-shown core rod is inserted into the notch 35 and both sides in the longitudinal direction of the structural member 2 are bent in the direction of the arrow in the figure, the upper portion left by the notches 34 and 35 is formed. The (other) flange 4 is gently bent in a round shape, and a corner 31 is formed at a desired angle as shown in FIG. At the same time, the cut surfaces of the left and right webs 6 come into surface contact with each other. Furthermore, a flange piece 3 protruding from the left side
8 is superimposed on the inner side surface of the right flange 5 so that a superposed portion 39 is formed.
Are formed on both sides of the web 6. The bent structure 30 shown in FIGS. 3A and 3B can be obtained by penetrating the bolt 16 through these overlapping portions 39 and screwing the nut 18. The overlapping portion 39 may be formed by changing the bending shape of each flange piece 38 and overlapping the outer surface of the right flange 5 from below.

According to the bent structure 30, the desired bent can be achieved by eliminating the connecting plate or by using the connecting plate only for the web 6 as shown in FIG. Bending structure 3 of structural material 2 having an angle
0 can be obtained. Accordingly, the number of parts and the number of bolts can be reduced, and the assembling operation can be more easily and quickly performed. Can be secured.

FIG. 4 relates to a bent structure 40 according to another embodiment of the present invention. As shown in FIGS. 7A and 7B, the bent structure 40 is bent at notches 44 and 45, which will be described later, formed over the entire width of the web 6 of the same structural material 2 as described above. A corner 41 bent at a desired angle is formed in the middle of the structural material 2, and a pair of flange pieces 47 projecting from the flanges 5 on both sides of the inner corner (lower) of the corner 41 are symmetrically bent and overlap each other. Thus, the overlapping portion 48 is formed, and the overlapping portion 48 is connected by the bolt 16 and the nut 18.

The bent structure 40 is formed as follows. First, as shown in FIG. 4C, a slit 42 is formed in the flange 5 below (one side) of the structural material 2, and a substantially triangular shape which is symmetrical with respect to the slit 42 through the slit 42 and the web 6. A cutout portion 44 is formed, and a circular cutout portion 45 that is in contact with the upper (other) flange 4 is formed continuously above the cutout portion 44. Steps 46 are formed symmetrically on both left and right sides of the cutout 44. Further, a pair of flange pieces 47 projecting symmetrically from each flange 5 are positioned below the notch portion 44 so as to face each other with the slit 42 interposed therebetween.

Next, the flange piece 47 is bent in the direction of the arrow in FIG. 4C, and as shown in FIG. 46. Then, when a core rod (not shown) is inserted into the cutout portion 45 and both sides in the longitudinal direction of the structural material 2 are bent in the direction of the arrow in FIG. 4D, as shown in FIG. Is formed, and the flange pieces 47 overlap each other inside the inner corner to form an overlapped portion 48. Finally, the bent structure 40 can be obtained by horizontally penetrating the bolt 16 through the overlapping portion 48, screwing the nut 18 into the threaded portion, and joining the flange pieces 47 together.

According to the bent structure 40 as described above, a structural material having a desired bent angle, having no protruding portion, and having a good appearance in appearance can be obtained simply by connecting the overlapping portion 48 formed by the bending and the flange pieces 47. The second bent structure 40 can be obtained. It should be noted that the web 6 of the structural material 2 may be further fixed to both side surfaces of the web 6 using the connection plate as described above. Therefore, the number of parts and the number of bolts can be reduced, the bent structure 40 can be easily and quickly formed in combination with a simple structure, and the structural material 2 is made of an extruded aluminum alloy material, thereby achieving the same weight reduction as described above. The safety of the work associated with this can also be achieved.

FIG. 5 relates to a bent structure 50 according to still another embodiment of the present invention. As shown in FIGS.
The bent structure 50 is formed by bending at notches 54 and 55, which will be described later, formed over the entire width of the web 6 of the same structural material 2 as described above, so that the corner 51 bent at a desired angle is formed. A pair of flange pieces 56 that are formed in the middle and protrude from the flanges 5 on both lower sides (one side) of the corner portion 51 are symmetrically bent downward and overlap each other to form an overlap portion 58, and this overlap portion 58 is formed. It is connected by bolts 16 and nuts 18.

The bent structure 50 is formed as follows. First, as shown in FIG. 5C, a slit 52 is formed in the flange 5 below (one side) of the structural material 2, and a substantially triangular shape which is symmetrical with respect to the slit 52 through the slit 52 and the web 6. A notch portion 54 is formed, and a circular notch portion 55 that contacts the upper (other) flange 4 is formed on the upper portion. The notch 54
On the lower side, a pair of flange pieces 56 composed of the respective flanges 5 project symmetrically horizontally with respect to each other with the slit 52 interposed therebetween.

Next, each of the flange pieces 56 is bent in the direction of the arrow in FIG. 5 (C), and as shown in FIG. Side and project in parallel with both sides of the notch 54. Then, when a core rod (not shown) is inserted into the notch portion 55 and both sides of the structural material 2 in the longitudinal direction are bent in the direction of the arrow in FIG. 5D, as shown in FIG. A corner portion 51 having a desired bending angle is formed, and an overlapping portion 58 is formed on the outer (lower) side of the inner corner so that the flange pieces 56 overlap with each other and hang outward. Finally, a plurality of bolts 16 are horizontally passed through the overlapping portion 58, and the nuts 18 are screwed into the threaded portions to join the flange pieces 56 together, thereby obtaining the bent structure 50 of the structural material 2.

According to the bent structure 50, the connecting plate is not used, or the connecting plate is used only for the web 6 of the structural material 2 as in the above-described embodiment, and the overlapping portion 58 composed of the flange pieces 56 is connected to each other. Bending structure 5 of structural material 2 having a bending angle of
0 can be obtained. In addition, the number of parts and the number of bolts can be reduced, and the bent structure 50 can be easily and quickly formed in combination with the simple structure. In addition, the structural material 2 is made of an extruded aluminum alloy so that the weight can be reduced as described above. And work safety.

The present invention is not limited to the embodiments described above. In the above, the bending angle of each bending structure is illustrated as an obtuse angle, but for example, the bending structure 60 shown in FIG. A right-angled corner 70 is formed by the portion and the circular cutout 72,
An angle-shaped connection plate 74 is arranged so as to straddle the inner surface of one of the flanges 65 whose cut surfaces on the inner corners are in surface contact with each other, and the connection plate 74 and each flange 65 are bolted to each other.
The connection plate 74 and each flange 65 are connected by screwing a nut 78 to the screw portion. According to the bent structure 60, it is possible to form a joint portion between structural materials such as columns and beams, beams, and the like, which are connected to each other at right angles to each other, such as a building, with a single structural material with high precision and appearance. The connecting plate may be fixed across the webs 66 in the same manner as described above.

The bent structure 80 shown in FIG. 6B has an acute triangular notch and a circular notch 92, which are not shown, in the middle of a structural member 82 having an H-shaped cross section. A trapezoidal connection plate 94 that forms a corner portion 90 and straddles the web 86 and a connection plate 96 that is bent into a substantially trapezoidal shape over the outer surface of each flange 85 on the inner corner side of the corner portion 90 are arranged. These connecting plates 94 and 96 and the web 8
6, a bolt 98 is passed through each of the flanges 85, and a nut 99 is screwed and connected to the screw portion thereof.
According to this bent structure 80, it is possible to form a corner (bend) portion with a desired bend angle with high accuracy and appearance on a structural material or a quasi-structural material in a ridge portion of a steeply-roofed roof or a corner-shaped wall portion. Will be possible. In addition, the circular notch 72,
When the 92 is formed into an oval or elliptical shape along the longitudinal direction of the structural material 62 or the like, each of the above bendings can be easily performed.

Further, as shown in FIG. 7A, the cross-sectional shape of the structural material is similar to that of the structural material 100 shown in FIG.
02 and the web 104 connecting them at right angles in the center,
Small flange 1 horizontally projecting in the middle of this web 104
06 may be formed integrally with the entire length in the longitudinal direction. The small flange 106 is protruded at any position from near the upper end to near the center in the height direction along the web 104 so that, for example, when used as a beam, the web 106 buckles due to external force from the vertical direction. Excellent resistance to

The structural member 110 shown in FIG. 7 (B) is provided integrally with upper and lower parallel flanges 112 and a pair of parallel webs 114 connecting the middle portions thereof and being parallel to each other. The hollow portion 116 is formed integrally with the entire length in the longitudinal direction. By having such a vertically long hollow portion 116, for example, when used as a beam, it has excellent strength that it is hardly bent and has high torsional rigidity, and in the bent structure of each of the above embodiments, a connecting plate straddling between the webs on both sides of the corner portion. Can be stored in the hollow portion 116 to enhance the aesthetic appearance. Furthermore, these structural materials 10
The cross-sectional I shape used for 0 and 110 can be used for a pillar, a joint, or the like, for example, having a cross section H shape by appropriately adjusting the width of a spar, a girder, or a flange thereof. In the case where the aluminum alloy extruded shape is used for these structural materials 100 and 110 as well, it is more likely to reduce the weight of the structural materials 100 and 110 such as a pipe-shaped screw hole or a screw receiving groove at an appropriate position of its flange or web. It is also possible to provide a so-called screw hole integrally. The bolts and nuts include, for example, high-strength bolts (JIS B1186-1979) and aluminum alloys (JIS A6061-T
6, A2024-T4), stainless steel, or titanium alloy can also be used.

[0033]

According to the above-described bent structure of the present invention, a bent structure having a desired angle can be formed with high accuracy in a structural material such as a beam or a column in a factory or the like. Can be reduced. According to the third and fourth aspects of the present invention, in addition to the above, the connection plate can be eliminated or reduced, so that the number of parts can be reduced and a desired bent structure can be more easily obtained. Furthermore, according to the invention as set forth in claim 6, since the structural material can be significantly reduced in weight by extruding an aluminum alloy, the work for obtaining each bent structure is easier and safer than the work for obtaining each bent structure. And special transport equipment can be reduced.

[Brief description of the drawings]

1A is a front view showing one embodiment of a bent structure of the present invention, FIG. 1B is a cross-sectional view taken along line BB in FIG. 1A, FIG.
(D) is a front view showing the manufacturing process.

FIG. 2A is a front view showing a bent structure in a different form;
(B) is a BB cross-sectional view in (A), (C) is a front view showing the manufacturing process, and (D) is a partially enlarged view in (C).

FIG. 3A is a front view showing a bent structure in a further different form, FIG. 3B is a cross-sectional view taken along line BB in FIG. 3A, FIG. 3C is a front view showing a manufacturing process thereof, and FIG. 3 is a perspective view similar to FIG.

4A is a front view showing a bent structure according to another embodiment of the present invention, FIG. 4B is a cross-sectional view taken along line BB in FIG.
(D) is a front view showing the manufacturing process.

FIG. 5A is a front view showing a bent structure according to still another embodiment;
(B) is a BB cross-sectional view in (A), and (C) and (D) are front views each showing a manufacturing process thereof.

6 (A) and 6 (B) are front views showing different types of bent structures in the present invention.

FIGS. 7A and 7B are cross-sectional views showing different forms of a structural material used in the present invention.

8 (A) and 8 (C) are front views showing a conventional bent structure, FIG. 8 (B) is a sectional view taken along the line BB in FIG. 8 (A), and FIG.
It is D sectional drawing.

[Explanation of symbols]

1,20,30,40,50,60,80 Bent structure 2,62,82,100,110 ………………………………… Structural material 4,5,64,65,84 , 85,102,112 …… Flange 6,66,86,104,114 ………………… Web 8,8 ', 9,34,35,44,45,54,55 Notched part 10,22,31,41,51,70,90 ... Corner part 12,14,26,74,94,96 ... Connecting plate 16,76,98 ... ………………… Bolts 18,78,99 ………………………………… Nuts 24 …………………………………………… ………… Uneven part 32,42,52 ………………………… Slit 38,47,56 ………………………………………………………………………… Flange Piece 39,48,58 ………………………………

Claims (6)

[Claims] 1. A structural material having a H-shaped cross section comprising a pair of parallel flanges and a web connecting them, a substantially triangular cut is formed over substantially the entire width of one of the flanges and the web and the other flange is left. A notch is formed, and the other flange is bent to form a corner where one of the flanges located on both sides in the longitudinal direction of the structural material in the notch and the web are brought close to each other. A structural member characterized in that the connecting plate is brought into surface contact over the webs and / or one of the flanges located on both sides of the connecting plate, and the connecting plate and the web and / or one of the flanges are connected by bolts and nuts. Bent structure. 2. A stepped portion is provided between one of the flanges which are adjacent to each other when the bent portion is asymmetric with respect to the longitudinal direction of the structural material. 2. A connection plate is brought into surface contact with an outer surface of a flange opposite to an inner surface of one flange, and the connection plate and each of the flanges that come into surface contact with the connection plate are connected by bolts and nuts. The bent structure of the structural material described in 1. 3. A structural material having a H-shaped cross section comprising a pair of parallel flanges and a web connecting the flanges, wherein the other flange extends across substantially the entire width of the web via a slit provided in one of the flanges. By forming a substantially triangular cutout portion and bending the other flange, a corner where one of the flanges located on both sides in the longitudinal direction of the structural material in the cutout portion and the web are brought close to each other. Providing a portion, the flange piece projecting from one side of one of the flanges in the cutout portion is connected to the overlapped portion of the flange on the opposite side sandwiching the cutout portion by bolts and nuts,
Alternatively, a bent structure of a structural material, wherein a pair of flange pieces projecting substantially symmetrically from both sides of one of the flanges in the notch portion are bent and overlapped portions which are overlapped with each other are connected by bolts and nuts. 4. The bent structure for a structural material according to claim 3, wherein the overlapping portion is located inside an inner corner of the corner portion or is projected outside the inner corner. . 5. The bending of a structural material according to claim 1, wherein said substantially triangular notch includes a circular notch adjacent to said other flange. Construction. 6. The bent structure of a structural material according to claim 1, wherein said structural material having an H-shaped cross section is made of an extruded member made of an aluminum alloy.