JP3525667B2 - Bending structure of structural material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending structure of a structural material or a quasi-structural material for a building beam, column, gassho, etc. having a H-shaped or I-shaped cross section.

[0002]

2. Description of the Related Art Generally, a bending structure of a structural material such as a building beam having a H-shaped or I-shaped cross section is shown in FIG.
As shown in (B), for example, a bending structure 200 for constructing a ridge of a building has a pair of beams 202 made of shaped steel and having an H-shaped cross section with slanted end faces, butted together so as to be inclined to each other. The connection plates 212 are brought into surface contact across both sides of the web 204, and the substantially flat connection plates 214 are brought into surface contact across the inner side surfaces of the upper and lower flanges 206, respectively, and the connection plates 212, 214 and the respective webs are brought together. A nut 218 is fastened and connected to a threaded portion of a bolt 216 penetrating the flange 204 or each flange 206 in a staggered manner.

In this structure 200, it is necessary to cut the end face of each beam 202 made of heavy shaped steel in a factory in advance to a required angle and to form a large number of bolt holes with high precision. Moreover, in the factory or on-site, the end faces of the beams 202 are kept in a state of being abutted at a required angle, and
Since 2, 214 are set at predetermined positions and a large number of bolts 216 are passed through these to fasten the nuts 218, the construction requires skill and time, and the weight is heavy, which is a dangerous work.

Further, the bent structure 2 shown in FIGS. 8 (C) and (D)
Similarly, a pair of beams 222, which are structural materials, are abutted against each other while being inclined, and substantially arrow-blade-shaped connecting pieces 230 are provided on both side surfaces of the web 224 of each beam 222 so as to make surface contact with the upper and lower flanges 226. The nuts 234 are fastened and connected to the threaded portions of the bolts 232 that pass through the pair of connection 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 butted to each other at a desired angle,
Set the connecting piece 230 to a predetermined position, and bolt 23
Since the nut 234 was fastened to the No. 2, skill and time were required for assembly and construction.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above problems in the prior art, and can form a bending structure of a structural material having a desired bending angle in a factory as accurately as possible. It is an object of the present invention to provide a bending structure for a structural material that not only shortens the time but also reduces the weight of the structural material.

[0006]

In order to solve the above-mentioned problems, the present invention comprises a bending structure of a structural material in one structural material, and this structural material is bent, and a connecting plate or a structural material is provided at a corner portion thereof. It was obtained with the idea of connecting the flanges of themselves with bolts and nuts. In addition, in the present specification, 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 bending structure of the structural material of the present invention (Claim 1) is a structural material having an H-shaped cross section composed of a pair of parallel flanges and a web connecting the flanges, and one flange and the web extend over substantially the entire width. The other flange, leaving the longitudinal direction of the structural material
By forming a substantially triangular notch that is asymmetrical and bending the other flange, one of the flanges located on both sides in the longitudinal direction of the structural material in the notch and the webs are brought close to each other. Corners are provided, the connecting plates are brought into surface contact with each other and the webs located on both sides of the corners and / or one of the flanges are brought into contact with each other, and the connecting plate and the web and / or one of the flanges are connected by bolts and nuts. It is characterized by being combined. According to this structure, by accurately forming the cutout portion, it is possible to incline at an arbitrary angle in the middle of one structural member.
It is possible to form a bent structure that is inclined and has a highly accurate bending angle.

Further, provided the stepped portion between the one flange each other close to each other when the pre-Symbol folded, connection plate to the outer surface of the opposite side of the flange and the inner surface of one side of the flange on both sides of the stepped portion It also includes a bending structure (claim 2) in which the connecting plate and the above-mentioned flanges that are in surface contact with each other are joined by bolts and nuts. According to this structure, one can be tilted to any angle a structural material in the middle
Layers become possible.

Further, the bending structure of the other structural material of the present invention (claim 3) is a structural material having a cross-section H shape consisting of a pair of parallel flanges and a web connecting these flanges, and one flange is A substantially triangular notch is formed by leaving the other flange across the substantially entire width of the web through a slit provided, and by bending the other flange, the longitudinal direction of the structural material in the notch Providing a corner portion where one of the flanges located on both sides of and the webs are close to each other, a flange piece protruding from one side of the one flange in the cutout portion is provided on the opposite side flange across the cutout portion. The overlapped overlapped parts are joined by bolts and nuts, or a pair of flange pieces that project substantially symmetrically from both sides of one flange in the cutout part. Folded and wherein the bound by bolts and nuts polymerized portion obtained by polymerizing with each other. According to this structure, it is possible to easily form a bending structure having a high bending angle with a single structural material, which can eliminate the assembling work in the field, and eliminate or reduce the number of connecting plates. It will be possible.

Further, a bending structure (claim 4) in which the overlapping portion is located inside the inner corner of the corner portion or projecting outside the inner corner is also included. According to the former, it becomes possible to form a bent structure having excellent designability. A bent structure (Claim 5) is also included in which the substantially triangular notch includes a circular notch adjacent to the other flange. As a result, the bending is facilitated, and a corner portion having an excellent appearance can be provided. In addition, the circular shape includes an oval shape, an elliptical shape,
Alternatively, an egg shape is also included. Further, the bent structure in which the structural member having the H-shaped cross section is an extruded profile made of aluminum alloy
(Claim 6) is also included. According to this, the weight of the structural material can be reduced to approximately half the weight while maintaining the strength equivalent to that of the conventional shaped steel, and each of the above bending structures can be easily formed,
It also enables on-site construction to be performed quickly and safely.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment for carrying out the present invention will be described below with reference to the drawings. FIG. 1 shows a reference which is a premise of the present invention.
Relates bent structure 1 considered embodiment, as shown in Fig (A) and (B), for example, structural materials 2 of section H shape as a beam and a pair of flanges 4, 5 are parallel in the upper and lower, these flanges 4 , 5
And a vertical web 6 connecting them at the center. In addition to H-shaped steel, aluminum alloy (JIS A
6063T5 or T6, the same A6N01-T5 or T6,
(A7003-T5, A7N01-T5, T6, etc.)
Extruded profiles made of can also be used. One flange 5
By bending at cutouts 8 and 9 which will be described later formed over the entire width of the web 6, a corner portion 10 bent at a desired angle is formed in the middle of the structural material 2. Then, rectangular connecting plates 12 are respectively brought into surface contact with both side surfaces of the corner portion 10 across the webs 6 on both sides, and the nuts 1 are attached to the bolts 16 penetrating them.
Screw 8 on. Further, the lower (one) substantially connecting plate 14 shaped by surface contact to their inner surfaces over the flange 5, 5, and screwing the nut 18 to each bolt 16 which penetrates them, reference embodiment The structure material 2 is a bent structure 1.

This bending 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 portion 8 is formed across the entire width of the lower (one) flange 5 and the web 6, and an upper portion above the notch portion 8 is formed.
A circular notch 9 that contacts the (other) flange 4 is formed so as to partially overlap. When a core rod (not shown) is inserted into the notch 9 and both longitudinal sides of the structural member 2 are bent in the directions of the arrows in the figure, the upper flange 4 left by the notches 8 and 9 is rounded. Bent loosely, Fig. 1
The corner portion 10 bent at a desired angle as shown in (D) is formed. In this case, the flanges 5 and the web 6 located on both sides of the cutout portion 8 are in close contact with each other and the respective cut surfaces are in surface contact with each other. The notch 9 is used for facilitating the bending process and preventing the web 6 near the flange 4 from being distorted and protruding in the thickness direction at that time.
The core rod may not be used in the above bending.

As shown in FIG. 1D, a plurality of through holes 7 are symmetrically formed in the web 6 on both sides of the corner portion 10, and a plurality of through holes are also formed in the flanges 5 on the lower both sides. 5a are respectively provided, and rectangular connecting plates 12 are in surface contact with the webs 6 and 6 on both sides thereof, and further, the connecting plates are substantially in the shape of an inner surface across the flanges 5 and 5. 14 is brought into surface contact. A through hole (not shown) is formed in the connecting plate 12 and a through hole 15 is formed in the connecting plate 14 in advance.
Then, the bolt 16 is passed through each of the through holes 7, 5a, etc., and the nut 18 is screwed into the threaded portion thereof, so that the connecting plate 12 and the web 6, and the connecting plate 14 and the flange 5 are respectively coupled. The bent structure 1 of the structural material 2 shown in 1 (A) and (B) is obtained.

According to the bending structure 1 of the structural material 2 of the above reference embodiment , the bending angle can be freely set by selecting the cutout angle θ of the cutout portion 8 formed in one structural material 2. By adjusting the notch angle θ, the bending angle can be finely adjusted, and the accurate bending structure 1 can be obtained easily and quickly. Moreover, by using the extruded shape of aluminum alloy for the structural material 2, the structural material 2 itself can reduce the weight of the entire structural material of the building rather than the base, and the construction work at the time of forming the bent structure or at the site is easy. And can be made safe.

FIG. 2 relates to one type of bending structure 20 according to the present invention . The same parts as those described above are designated by the same reference numerals. As shown in (A) and (B) of the same figure, this bending structure 20 has one flange 5 of the same structural material 2 as described above.
In the cutouts 8'and 9 to be described later formed across the entire width of the web 6 and the web 6, only the left side in FIG. 2 (A) is bent so that the corner 22 formed at a desired angle is formed in the middle of the structural member 2. To form in. The lower (one) flanges 5, 5 in the corner portion 22 are vertically displaced from each other, so that the step difference portion 24 is provided between them. A connecting plate 26 having a substantially hemispherical shape is provided so as to come into surface contact with either the inner surface or the outer surface of each flange 5 on both sides of this stepped portion 24, and the bolt 16 is penetrated through this connecting plate 26 and each flange 5. Then, the bent structure 20 is formed by screwing the nut 18 onto the threaded portion.

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, a substantially triangular shape that is asymmetrical along the longitudinal direction of the beam 2 across the entire width of the lower (one) flange 5 and the web 6 in advance. A shape cutout 8'is formed. Also, above it
A circle that is in contact with the (other) flange 4 and has a center O at a position deviated by a distance of “tan θ × r” to the left from the extension line of the vertical side 8 ″ of the notch 8 ′ orthogonal to this flange 4 The notch 9 having a shape is continuously formed. still,
The θ is the bending angle, and the r is the radius of the notch 9. Then, a core rod (not shown) is inserted into the cutout portion 9 and only the left side in the longitudinal direction of the structural material 2 is bent in the arrow direction in FIG. 2 (C). Then, the cutouts 8 ', 9
The upper flange 4 left by is bent in a rounded shape, and a corner portion 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 portion 8 ′ substantially make surface contact with each other, but the left and right cut surfaces of the one flange 5 are vertically displaced to form the step difference portion 24.

A connecting plate 26 having a substantially U-shape on 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 onto the threaded portion and the flanges 5 and the connecting plate 26 are joined together, as shown in FIG.
The bent structure 20 of the structural material 2 shown in (B) is obtained. Starting
According to the bright bending structure 20, for example, when the structural member 2 is used as a beam in which the notch 9 is centered and which is symmetrically inclined, the load from the vertical direction causes the webs 6 in the corners 22 to hit each other. Since it acts in a direction away from the contact portion and the step difference portion 24, these portions do not open or come off,
It exhibits high strength against such loads. Moreover, by using the extruded shape member of aluminum alloy as the structural material 2, it is possible to achieve the same weight reduction and safety of work as described above.
If the circular notch 9 is a horizontally oriented oval or elliptical, it becomes easier to bend. Further, the connecting plate 12 in FIG. 1 may be similarly used on both sides of the web 6 of the structural member 2 in FIG. 2 and the bolts 16 and nuts 18 may be used to connect the webs 6 and 6.

[0017] Figure 3 is bent in different forms of the present invention the structure 30
Regarding As shown in FIGS. (A) and (B), the bending structure 30 is formed by bending at notches 34 and 35 described later formed across the entire width of the web 6 of the same structural material 2 as described above. Corner part 3 bent to the desired angle
1 is formed in the middle of the structural material 2, and the corner portion 3
The flange piece 38 protruding from the one (left) side flange 5 below 1 is superposed on the inner side surface or the outer side surface of the flange 5 on the opposite side to form a superposed section 39.
Is connected by a bolt 16 and a nut 18.

The bent structure 30 is formed as follows. First, as shown in FIG. 3 (C), a slit 32 is formed in the lower flange 5 (one side) of the structural material 2, and the slit 32 is formed in the web 6 through the slit 32 to form a substantially triangular shape. The cutout portion 34 is formed, and a circular cutout portion 35 that continuously contacts the upper (other) flange 4 is formed on the upper portion thereof. Below the notch 34, the protrusion 36 of the flange 5 protruding rightward in the drawing.
Is formed. As shown in FIG. 3 (D), the protrusions 36 are symmetrically divided into both sides by the grooves 37 in the vicinity of the web 6, and the base end sides thereof are bent into a substantially square shape so that the tip end sides thereof are bent. The flange piece 38 is formed. A horizontal cutout 34 'is formed in the lower portion of the web 6 adjacent to the flange pieces 38 in order to facilitate the bending into the above-described substantially conical shape.

Then, a core rod (not shown) is inserted into the cutout portion 35, and both sides in the longitudinal direction of the structural member 2 are bent in the directions of the arrows in the drawing, and the upper portions left by the cutout portions 34 and 35 are left. The (other) flange 4 is bent in a rounded shape to form a corner portion 31 bent at a desired angle as shown in FIG. 3 (A). At the same time, the cut surfaces of the left and right webs 6 are in surface contact with each other. Furthermore, the flange piece 3 protruding from the left side
When 8 is superposed on the inner surface of the right flange 5, the superposed portion 39
Are formed on both sides of the web 6. The bent structure 30 shown in FIGS. 3 (A) and 3 (B) can be obtained by penetrating the bolt 16 through these overlapping portions 39 and screwing the nut 18 onto the overlapping portion 39. Alternatively, the bent shape of each flange piece 38 may be changed, and the flange portion 38 may be overlapped with the outer surface of the right flange 5 to form the overlapping portion 39.

According to meander structure 30 according either eliminate the connection plate, using only connection plate to the web 6 as a reference type state of FIG. 1, by combining the overlapping portion consisting of the flange piece to each other, Bending structure 3 of structural material 2 having a desired bending angle
It becomes possible to obtain 0. Therefore, coupled with the reduction of the number of parts and the number of bolts, the assembling work can be performed more easily and quickly, and the structural material 2 is made of an aluminum alloy extruded shape, and the same weight reduction as described above and the assembling and the field work by the same are performed. The safety of can be achieved.

[0021] Figure 4 relates bent structure 40 further different embodiment of the present invention. As shown in FIGS. (A) and (B), the bending structure 40 is bent at notches 44 and 45 (described later) formed across the entire width of the web 6 of the same structural material 2 as described above, A corner portion 41 bent at a desired angle is formed in the middle of the structural member 2, and a pair of flange pieces 47 protruding from the flanges 5 on both sides of the inner corner (lower side) of the corner portion 41 are symmetrically bent and overlapped with each other. Thus, the overlapped portion 48 is formed, and the overlapped portion 48 is joined by the bolt 16 and the nut 18.

The bent structure 40 is formed as follows. First, as shown in FIG. 4 (C), a slit 42 is formed in the lower flange 5 (one side) of the structural material 2, and a substantially triangular shape which is symmetrical with respect to the slit 42 is formed on the web 6 through this slit 42. A notch portion 44 is formed, and a circular notch portion 45 that contacts the upper (other) flange 4 is continuously formed at the upper portion thereof. Further, step portions 46 are formed symmetrically on both left and right sides of the cutout portion 44. Further, a pair of flange pieces 47 protruding symmetrically from each of the flanges 5 are located below the cutout portion 44 so as to face each other across the slit 42.

Next, the flange piece 47 is bent in the direction of the arrow in FIG. 4 (C), and as shown in FIG. 4 (D), the center of each flange side 47 is formed at each step of the notch 44. Located within 46. Then, 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, and as shown in FIG. The corner portion 41 having the bending angle is formed, and the flange pieces 47 are overlapped with each other inside the inner corner to form the overlap portion 48. Finally, the bending structure 40 can be obtained by horizontally penetrating the bolt 16 in the overlapping portion 48 and screwing the nut 18 to the threaded portion to join the flange pieces 47 together.

According to the bending structure 40 as described above, only by bending and connecting the overlapping portion 48 composed of the flange pieces 47, a structural material having a desired bending angle and no protruding portion and having a good appearance is formed. It is possible to obtain the second bent structure 40. In addition, you may further fix to the both sides of the web 6 of the structural material 2 using the connection plate like the above-mentioned form. Therefore, by reducing the number of parts and the number of bolts, the bending structure 40 can be easily and quickly formed in combination with a simple structure, and the structural member 2 is made of an aluminum alloy extruded shape member, thereby achieving the same weight reduction as described above. It is possible to improve the safety of the work involved.

[0025] Figure 5 relates to folding structures 50 of another embodiment that put the present invention. As shown in FIGS. 5 (A) and 5 (B), the bending structure 50 is formed by bending at notches 54 and 55 described later formed across the entire width of the web 6 of the same structural material 2 as described above. A corner portion 51 bent at a desired angle is formed in the middle of the structural material 2, and the corner portion 51 is formed.
A pair of flange pieces 56 projecting from the lower (one) side flanges 5 are symmetrically bent downward and overlapped with each other to form an overlapped portion 58, and the overlapped portion 58 is coupled by the bolt 16 and the nut 18. Is.

The bent structure 50 is formed as follows. First, as shown in FIG. 5 (C), a slit 52 is formed in the lower flange 5 (one side) of the structural material 2, and a substantially triangular shape is formed on the web 6 through this slit 52 and symmetrical to the slit 52. A cutout portion 54 is formed, and a circular cutout portion 55 that is in contact with the upper (other) flange 4 is formed on the upper portion thereof. In addition, the notch 54
On the lower side, a pair of flange pieces 56 composed of the respective flanges 5 symmetrically protrudes horizontally opposite to each other across the slit 52.

Next, each of the flange pieces 56 is bent in the direction of the arrow in FIG. 5 (C), and as shown in FIG. 4 (D), each flange piece 56 is symmetrically outside the flange 5 (below). It is inclined to the side and projected parallel to both sides of the notch 54. Then, a core rod (not shown) is inserted into the cutout portion 55, and both sides in the longitudinal direction of the structural material 2 are bent in the direction of the arrow in FIG. 5D, as shown in FIG. 5A. A corner portion 51 having a desired bending angle is formed, and a flanged portion 58 is formed on the outer (lower) side of the inner corner so that the flange pieces 56 overlap each other and hang down outward. Finally, the plurality of bolts 16 are horizontally passed through the overlapping portion 58, and the nuts 18 are screwed onto the threaded portions to join the flange pieces 56 to each other, whereby the bent structure 50 of the structural material 2 is obtained.

According to the bent structure 50, the connecting plate is not used, or the connecting plate is used only in the web 6 of the structural member 2 as in the above-described embodiment, and the overlapping portion 58 composed of the flange pieces 56 is joined to the desired structure. Bending structure 5 of structural member 2 having a bending angle of
It becomes possible to obtain 0. In addition, the number of parts and the number of bolts can be reduced, and in combination with a simple structure, the bent structure 50 can be easily and quickly formed, and the structural member 2 is made of an aluminum alloy extruded shape member, thereby reducing the weight as described above. And work safety can be achieved.

A bent structure 60 of a reference embodiment shown in FIG . 6 (A) .
In the middle of the structural member 62 having an H-shaped cross section, a substantially triangular notch portion and a circular notch portion 72 (not shown) similar to the above are provided.
Forming a right-angled corner portion 70, and arranging an angle-shaped connecting plate 74 across the inner side surfaces of the flanges 65 whose inner corner side cut surfaces are in surface contact with each other. 65 and pierce it with a bolt 76,
A nut 78 is screwed onto the threaded portion to connect the connecting plate 74 and each flange 65. According to this bent structure 60, it is possible to form a joint between structural members that are connected at right angles to each other, such as a pillar and a beam or beams to each other, with good accuracy and appearance using a single structural member. Web 6
The connection plate may be fixed in the same manner as described above by straddling between the six.

Further, in the bent structure 80 of the reference embodiment shown in FIG. 6B, a substantially triangular notch portion and a circular notch portion 92 (not shown) similar to the above are provided in the middle of a structural member 82 having an H-shaped cross section. form an acute angle of the corner portion 90, the structural material 82
The trapezoidal connecting plate 94 straddling the web 86 and the connecting plate 96 bent in a substantially trapezoidal shape are arranged across the outer surface of each flange 85 on the inner corner side of the corner portion 90.
4, 96, the web 86, and the flange 85 are respectively penetrated with bolts 98, and nuts 99 are screwed to the threaded portions thereof to be joined. According to this bending structure 80, a corner (bending) portion having a desired bending angle can be formed with high accuracy and appearance in a structural material or a quasi-structural material in a ridge of a steeply sloped roof, a corner-shaped wall, or the like. It will be possible. If the circular cutouts 72, 92 are oval or elliptical along the longitudinal direction of the structural material 62 or the like, each of the above bendings can be easily performed.

The present invention is not limited to the above-mentioned forms.
It is not fixed . For example, the cross-sectional shape of the structural material,
As in the structural material 100 shown in FIG. 7 (A), a pair of upper and lower parallel flanges 102 and a web 104 that connects them at a right angle in the center, and a small flange 106 that horizontally protrudes in the middle of the web 104 are formed. It may be integrally formed over the entire length in the direction. The small flange 106 is provided so as to project at any position from near the upper end to near the center in the height direction along the web 104, and when used as a beam, for example, buckling of the web 106 due to an external force from the vertical direction. Can exhibit excellent resistance to.

Further, the structural material 110 shown in FIG. 7 (B) is integrally provided with upper and lower parallel flanges 112 and a pair of parallel webs 114 that connect the intermediate portions thereof and are parallel to each other, and have a rectangular shape between them. The hollow portion 116 is integrally formed along the entire length in the longitudinal direction. By having such a vertically long hollow portion 116, for example, when it is used as a beam, it has excellent strength that it is hard to bend and has high torsional rigidity, and in the bent structure of each of the above-mentioned forms, it is a connection plate that extends between the webs on both sides of the corner portion. Can be housed in the hollow portion 116 to enhance the appearance. Furthermore, these structural materials 10
The cross-sectional I shape used for 0 and 110 can be also used for a girder or a large drawing, or for a column or a chisel having a cross-sectional H shape by appropriately adjusting the width of the flange. Also, regarding these structural members 100 and 110, when an extruded profile of an aluminum alloy is used, not only is it lighter in weight, but it is also necessary to use pipe-shaped screw holes or screw receiving grooves at appropriate places on the flange or web. It is also possible to integrally provide so-called screw holes. The bolts and nuts described above include, for example, high-strength bolts (JIS B1186-1979) and aluminum alloys (JIS A6061-T6 and A2024-T4).
Made of stainless steel or titanium alloy can also be used.

[0033]

The bending structure of the present invention described above
According to (Claims 1 and 2), it is possible to accurately form a bent structure having a desired inclination angle in a structural material such as a beam or a column in a factory or the like, and it is possible to reduce the on-site construction and its working time. Becomes Further, according to the invention described in claims 3 and 4, in addition to the above, the connecting plate can be eliminated or reduced, so that the number of parts can be reduced and a desired bent structure can be obtained more easily. Further, according to the invention as set forth in claim 6, since the structural material can be made into an extruded profile of an aluminum alloy and can be remarkably reduced in weight, the construction work in the field is easy and safer than the work for obtaining each bent structure. And special transfer equipment can be reduced.

[Brief description of drawings]

FIG. 1A is a front view showing one form of a bent structure of a reference form , FIG. 1B is a sectional view taken along line BB in FIG. 1A, FIG.
(D) is a front view showing the manufacturing process thereof.

FIG. 2A is a front view showing a bent structure of one embodiment of the present invention, FIG. 2B is a sectional view taken along line BB in FIG. 2A, and FIG. 2C is a front view showing the manufacturing process thereof. (D) is a partially enlarged view of (C).

3 (A) is a front view showing the bent structure of different forms,
(B) is a BB sectional view in (A), (C) is a front view showing the manufacturing process, and (D) is a perspective view similar to (C).

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

FIG. 5A is a front view showing a bending structure of still another form,
(B) is a BB sectional view in (A), and (C) and (D) are front views showing the manufacturing process thereof.

6 (A) and 6 (B) are front views showing a bent structure of a reference embodiment.

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

8A and 8C are both a front view showing a conventional bending structure, FIG. 8B is a sectional view taken along line BB in FIG. 8A, and FIG.
It is a D sectional view.

[Description of the code] 2 0,30,40,5 0 ... ........................... bent structure 2, 1 00,110 .................................... structure material 4, 5, 102,112 ………………………… Flange 6 , 1 04,114 ……………………………… Web 8 ′, 9,34,35,44,45,54,55… Notch part 2 2, 31, 41, 5 1 …………………………… Corner part 2 6 ……………………………………………… Connection plate 1 6 ……… ……………………………………………… Bolt 18 ………………………………………………… Nut 24 …………………………… ………………… Step difference part 32, 42, 52 …………………………………… Slit 38, 47, 56 ………………………………… Flange piece 39, 48,58 …………………………………… Overlapped section

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 61-134458 (JP, A) JP 58-97442 (JP, A) JP 55-97599 (JP, A) JP 51- 41220 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E04C 3/40, 3/04

Claims (6)

(57) [Claims] 1. A structural material having a cross-sectional H-shape composed of a pair of parallel flanges and a web connecting the flanges to each other. In the longitudinal direction of the structural material, one flange and substantially the entire width of the web are spread and the other flange is left. To form a substantially triangular notch portion that is asymmetrical with respect to, and by bending the other flange, one of the flanges located on both sides in the longitudinal direction of the structural member in the notch and the web Providing corner portions that are close to each other, the connecting plates are brought into surface contact across the webs and / or the flanges located on both sides of the corner portions, and the connecting plate and the webs and / or one flange are bolted. -Bent structure of structural material characterized by being joined by a nut. Wherein providing the stepped portion between the one flange each other close to each other upon bending Ri before Kiori, the outer surface of the opposite side of the flange and the inner surface of one side of the flange on both sides of the stepped portion 2. The bending structure for a structural material according to claim 1, wherein the connecting plate is brought into surface contact, and the connecting plate and each of the flanges which come into surface contact with the connecting plate are connected by bolts and nuts. 3. A structural material having an H-shaped cross section, which comprises a pair of parallel flanges and a web connecting the flanges to each other. By forming a substantially triangular notch and leaving the other flange bent, one corner of the notch located on both sides in the longitudinal direction of the structural member and the corner where the webs are close to each other A portion, a flange piece protruding from one side of one of the flanges in the cutout portion is sandwiched between the cutout portions, and the overlapped portion that is superposed on the opposite side flange is joined by bolts or nuts, or
Alternatively, a bending structure of a structural material, characterized in that a pair of flange pieces that project substantially symmetrically from both sides of one of the flanges in the cutout portion are bent and the overlapping portions that are overlapped with each other are connected by a bolt and a nut. 4. The bending structure for a structural material according to claim 3, wherein the overlapped portion is located inside an inner corner of the corner portion or is projected outside the inner corner. . 5. The bending of the structural material according to claim 1, wherein the substantially triangular notch includes a circular notch adjacent to the other flange. Construction. 6. The bending structure for a structural material according to claim 1, wherein the structural material having an H-shaped cross section is made of an extruded profile made of an aluminum alloy.