JP3442259B2 - Thin steel support - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly applied to a steel house, and is suitable for use as a steel parquet that constitutes a roof substrate of a load-bearing and earthquake-resistant structure, and is made of a thin steel plate that can be used as other building members. Regarding a support member.

[0002]

2. Description of the Related Art In a steel house, an H-section steel 1 shown in FIG. 11 and a C-section steel 2 shown in FIGS. 12 (A) and 12 (B) are used as a steel barrel using a thin steel plate for supporting a roof substrate. , Z-shaped steel 3 shown in FIGS. 13 (A), (B), FIG. 14 (A),
A steel section 35 having a box-shaped cross section shown in (B) is used.

[0003]

H-section steel 1 shown in FIG.
Then, since the web 4 and the flange 5 are joined together, a joining operation such as welding is involved, and therefore, the molding cannot be easily performed. Further, there is a problem that the lower flange 5 becomes an obstacle and it is difficult to attach the H-shaped steel 1 to the lower structure.

The C-shaped steel 2 shown in FIG. 12 is easy to form and attach to the lower structure, but has the following drawbacks. That is, as shown in FIG. 12 (B), the web 10 is applied to the mounting hardware 8 fixed to the lower structure 6 via the leg portions 7,
The mounting bolt 12 is inserted into the bolt insertion hole 11 formed in the web 10 and the mounting hardware 8, and the nut 13 is fastened to fix both members. At this time, the center line L ₁ of the flange 14 of the C-shaped steel 2 deviates from the center line S ₁ of the mounting hardware 8 ( that is, the module line L 1 on the design drawing designed to match this ) . For this reason, both design and construction become difficult, and further, due to the above-mentioned deviation, the mounting hardware 8 and the C-shaped steel 2 are likely to be twisted due to a bending moment, which is disadvantageous in terms of structure.

The Z-shaped steel 3 shown in FIG.
When 5 is fixed to the mounting hardware 8, the center line L ₁ of the flange 16 does not coincide with the center line S of the mounting hardware 8 (that is, the module line L on the design drawing) and is displaced. There is a problem in that it is difficult to construct and is disadvantageous in structure.

In the steel section 35 having a box-shaped cross section shown in FIG. 14, a long bolt 33 is inserted through each side plate (corresponding to a web) 31 and a bolt insertion hole 32 formed in the mounting hardware 8 and a nut 34. Tighten and fix with. At this time, the center line L ₁ of the flange 36 of the box-shaped steel 35 is displaced from the center line S of the mounting hardware 8 ( that is, the module line L 1 of the design drawing ) . Further, since one side plate 31 bends inward as shown by a chain double-dashed line, it is difficult to design and construct, and the above-mentioned deviation causes the mounting hardware 8 to bear a bending moment. Is also disadvantageous.

The present invention solves the above-mentioned problems of the prior art. A support member made of a thin steel plate can be formed only by bending, and when joined to a lower structure, the center line of the flange of the support member is It is possible to match the module wire on the design drawing, and it is possible to demonstrate high yield strength even with a long length, and even if it is mistakenly mounted on the other side of the mounting hardware, it can be installed at the correct position on one side. An object of the present invention is to provide a thin steel plate supporting member which has an equivalent effect in structural design and is excellent in site construction.

As the shape of the thin steel plate supporting member of the present invention, a substantially J shape or a substantially inverted J shape is defined as follows. A first flange and a second flange are provided on both ends of the web so as to be bent and integrally formed with the web, and the third flange is bent from the tip of the first flange to be integrally bent with the third flange. Is provided so that the other end side of the third flange extends in a direction opposite to the first flange (opposite direction across the web), and the first flange and the second flange are provided. The substantially inverted J-shaped end face shape disposed on the same side of one side surface of the web is a substantially inverted J shape, and one of the first flange and the second flange is disposed on one side surface side of the web, and the other. The substantially J-shaped end face shape disposed on the other side surface side of the web is referred to as a substantially J shape. It is preferable that the first to third flanges are continuously arranged at right angles to the web, and it is preferable that the first to third flanges are arranged in parallel with each other.

[0009]

In order to achieve the above-mentioned object, the present invention is a thin steel plate supporting member having a predetermined length and fixed to a mounting metal object, which supporting member is made of a web. Both ends are bent in the same direction or opposite directions to provide a first flange and a second flange, and the tip of the first flange is folded back to provide a third flange to form a substantially J-shaped or an inverted J-shaped end face shape. The front of the third flange
The dimension up to the web is a, and the base on the bent side of the third flange is
The dimension from the edge to the web is b, and the thickness of the mounting hardware is
Is defined as t, the third flange is constructed in the relationship of a−b = t.
It is characterized by performing. Further, it is preferable that a lip be formed by bending one or both of the second flange and the third flange.

According to the present invention, the thin steel plate supporting member can be integrally formed by bending, and when the mounting member is mounted on the mounting hardware, the center line L ₁ of the flange of the supporting member is designed.
The module line L can be easily and surely matched with the upper module line L, and no correction work is required.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a steel barrel 17 according to a first example among the steel barrels shown as a specific example of the thin steel plate supporting member of the present invention. The steel barrel 17 has a thickness in the range of 0.8 mm to 2.0 mm, and in many cases, a thin steel plate having a thickness of 1.0 mm and a predetermined length is bent by roll forming to be shown in the drawing. It is formed into an end face shape (generally referred to as an inverted J shape), that is, a web 18, and a first flange (upper flange) 20 and a second flange (lower flange) 21 are formed on the upper and lower ends of the web 18, respectively. Then, the tip of the first flange 20 is folded back and overlapped on the upper surface of the first flange 20 to form the third flange 22, and the steel barrel 17 is configured. Further, the center line L ₁ of the width dimension of the third flange 22 is
The web 18 on the side opposite to the second flange 21 side is arranged so as to be arranged on the same straight line as the center line of the mounting hardware 8 described later.
1/2 of the thickness of the mounting hardware 8 from one side surface (back surface described later)
The steel slack 17 is configured by setting the width dimension of the third flange 22 so as to be displaced by the distance t.

That is, as shown in FIG. 2, the dimension a from the tip to the center of the third flange, the dimension b from the base end on the bending side of the third flange to one side surface of the web 18, the second flange and the third flange. The dimension c between the flanges, the dimension d from the web to the tip of the second flange, and the ratio of a, b, c, d are as follows: a ≦ c / 2, b ≦ c / 2, d ≦ b The web 18 is so positioned that one side surface of the web 18 is located at a position (position where a−b = t) that is displaced from the center line L _{1 of} 22 by half the thickness t of the mounting hardware 8.
It is most preferable for the construction to arrange. According to this structure, when the web 18 is brought into contact with and joined to the mounting hardware 8, the center of the third flange 22 in the width direction coincides with the center line of the mounting hardware 8 to provide an ideal working state.

The steel barrel 17 has a predetermined length dimension L ₂ as shown in FIG. 1, and is attached to the lower structure 6 which is a main material of the house through an attachment metal piece 8. That is, the horizontal leg 7 at the lower end of the vertically attached mounting hardware 8 is fixed to the upper surface of the lower structure 6 such as the main building material by welding or fixing means such as bolts, and is attached to one side surface of the mounting hardware 8. The back of the web 18 of the horizontally arranged steel slack 17 is applied,
The steel barrel 17 is fixed to the mounting hardware 8 by inserting the mounting bolt 24 through the mounting hardware 8 and the bolt insertion hole 23 of the web 18 and fastening the nut 25.

Since the dimensional relationship of each part of the steel barrel 17 is provided as described above, when attached to the mounting hardware 8, as shown in FIG. 4, the center line S of the mounting hardware 8 and the third flange 2 are attached.
The center line L _{1 of} 2 coincides. Further, as shown in the figure, by placing the base plate 26 on the upper surface of the third flange 22 of the steel barrel 17, and by driving the drilling tapping screw 27 into the third flange 22 through the base plate 26, Field board 2
6 is fixed to the steel barrel 17. When the steel barrel 17 receives the load of the base plate 26, the third flange 2
Since the center line L _{1 of} 2 coincides with the designed module line, the load from the base plate 26 is applied to the left and right sides of the third flange 22 in a substantially balanced manner, whereby the web 18 extends along its width direction. Force does not act in the direction in which the web 18 is bent, so that the load can be received in the most desirable manner in terms of strength.

FIG. 5 shows a second embodiment shown as a modification of the first embodiment. The steel barrel 17 of the second embodiment
In a, the first lip 28 is provided so as to be integrally bent at a right angle upward from the tip of the second flange 21, and the first lip 28 is provided. Further, at a right angle downward from the tip of the third flange 22, the first lip 28 is integrally bent. The second lip 29 is provided by being continuously provided.

According to this second embodiment, the first lip 2
By providing No. 8, the strength against the twist of the second flange 21 is improved, and by extension, the strength against the twist of the web 18 is improved. Similarly, by providing the second lip 29, the strength of the third flange 22 against twisting is improved,
Along with that, the strength of the first flange 20 against twisting, and further the strength of twisting against the web 18 is improved. In this way, the synergistic action of the first lip 28 and the second lip 29 further improves the strength of the entire steel barrel 17a against twisting and bending.

6 and 7 show a steel barrel 17b according to the third embodiment of the present invention. In the third embodiment, the second flange 21 on one end side of the web 18 of the steel barrel 17b is formed by bending in the opposite direction to the second flange 21 of the first embodiment, and is formed into a substantially J shape. There is. In both the first and third embodiments, the second flange 21 is twisted in the web 18 even if the bending direction is opposite,
Since the strength against bending and the like is improved, the steel barrel 17b of the third embodiment also has the same effect as the steel barrel 17 of the first embodiment.

Also in the third embodiment, as shown in FIG. 6, the dimensions of a, b, c and d are the same as those in the first embodiment.

Next, the span L ₂ (shown in FIG. 1) of the lower structure 6 supporting the steel barrels 17, 17a, 17b of the first, second, and third embodiments is long, and the mounting hardware 8, 8 is long, when the bending strength and rigidity of the intermediate portion of the steel barrels 17, 17a, 17b are insufficient, for example, as shown in FIG.
It can be easily reinforced as shown in.

That is, in the example of FIG. 8, a steel slack 17a having the same structure as that of the second embodiment is combined with a short reinforcing member 17a-1 having the same cross-sectional shape as that of the steel slack 17a in the opposite direction to the lower side, The webs 18, 18 are partially overlapped with each other, and a plurality of drilling tapping screws 3 are provided on the overlapping portion.
By implanting 0,30, steel of the same sectional structure
It can be easily reinforced by integrating the manufactured barrel 17a and the reinforcing member 17a-1.

Therefore, the steel slack 17a reinforced with the reinforcing member 17a-1 is sufficiently reinforced at the central portion where the bending strength and rigidity are insufficient, so that the steel slack 17a is reinforced.
There is no need to change the cross-sectional shape of the product or increase the plate thickness of the members.
You can demonstrate the proof stress. Third flange 2 of steel barrel 17a
2 On the upper surface, the ground plate 26 has a drilling tapping screw 3
It is fixed by 0.

FIG. 9 shows, as a fourth embodiment of the present invention, a mode of use in which the steel barrel 17a for the mounting hardware 8 is slightly different from the first embodiment. That is, in the first embodiment, the upper end 31 of the mounting hardware 8 is located in the middle of the back surface of the web 18 of the steel slack 17a, whereas in the fourth embodiment.
In the embodiment, the upper end 31 of the mounting hardware 8 has the third flange 2
It is fixed so that it can reach the lower surface of 2. The other structure is the same as that of the first embodiment. In the fourth embodiment, since the upper end 31 of the mounting hardware 8 extends until it comes into contact with the lower surface of the third flange 22, the strength is further improved over the coupling strength between the mounting hardware 8 and the steel barrel 17 of the first embodiment. To do.

Next, referring to FIGS. 10A and 10B, a case where a steel barrel 17 is attached to a regular position of the mounting hardware 8 as an example of the thin steel plate supporting member of the present invention (the same). A) and a case where the steel slack 17 is attached to the mounting hardware 8 in the wrong direction (FIG. B) will be described. In both cases (A) and (B) in FIG.
The center line (face) L ₁ of the third flange 22 in FIG. 2 is located on the same straight line (face) as the center line (face) S of the mounting hardware 8, and in each case, each steel barrel 1
7 can act as an equivalent support member structurally and as a support member for the base plate 26. Further, even when the end portions of the left and right field plates 26 adjacent to each other are arranged at the center of the third flange 22, they can be attached without any trouble, so that the degree of freedom in design and construction is increased. On the other hand, in the case of each of the conventional shaped steels, when the shaped steels 1, 2 and 3 are attached to one side surface side of the mounting hardware 8, the upper flanges 5, 14, 16 and 36 are provided.
Will be arranged so as to be displaced to one side of the mounting hardware 8 on one side or the other side, so that the end portions of each field plate 26 are mounted on the upper flanges 5, 14, 16, 36. When the shaped steels 1, 2, 3 and 35 are mistakenly attached to the other side surface side of the mounting hardware 8 when placing, one of the ground plates 26 cannot be placed on the upper flanges 5, 14 and 16, so that the mounting is not possible. become unable.

The invention is not limited to the illustrated embodiment,
The technical scope described in the claims includes the scope in which a person skilled in the art can change the design.

The thin steel plate supporting member of the present invention can also be used as a beam member, a furring strip member, or other building members. In the case of carrying out the present invention, since the thickness of the web is relatively thin, this may be set to 0 to set the overhang length of each of the first and third flanges.

[0026]

As described above, according to the thin steel plate supporting member in the steel house or the like according to the present invention, it can be formed easily by bending only.
When the thin steel plate support member is joined to the lower structure via the mounting hardware, the web is located at the position where the center of the flange of the support member matches the module line in the design, so construction can be performed as designed Therefore, the design and construction can be simplified. Further, the strength of the support member is further improved by providing the lip on the flange. In addition, the degree of freedom in designing and constructing the mounting hardware is increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a steel slacker according to a first embodiment of the present invention is attached to an attachment hardware.

FIG. 2 is an enlarged end view of the steel slack of FIG.

3 is a perspective view of the steel barrel shown in FIG. 2. FIG.

FIG. 4 is a cross-sectional view showing a mounting state of the steel slack according to the first embodiment to a mounting hardware.

FIG. 5 is a perspective view of a steel slack according to a second embodiment .

FIG. 6 is an end view of a steel slack according to a third embodiment.

7 is a perspective view of the steel slack of FIG. 6. FIG.

FIG. 8 (A) is an end surface showing a reinforcing structure of a steel barrel.
FIG, (B) is an end view of the state also fitted with sheathing.

FIG. 9 is a sectional view showing a mounting state of a steel slacker different from that in FIG. 4 as a fourth embodiment .

FIG. 10 is an explanatory view of a case where a steel slack is attached to a mounting hardware.

FIG. 11 shows H as a first conventional example of a thin steel plate supporting member.
It is an end view of a shaped steel.

FIG. 12 (A) is an end view of a C-shaped steel shown as a second conventional example, and FIG. 12 (B) is a cross-sectional view showing a state of being attached to a fitting.

FIG. 13A is an end view of a Z-shaped steel shown as a third conventional example, and FIG. 13B is a cross-sectional view showing a state of being attached to a fitting.

FIG. 14A is an end view of the box-shaped steel shown as a fourth conventional example, and FIG. 14B is a cross-sectional view showing a state of being attached to a metal fitting.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takao Koyama 1-2-2 Yurakucho, Chiyoda-ku, Tokyo Within Asahi Kasei Kogyo Co., Ltd. (72) Inventor Kazumi Muto 1-2-2 Yurakucho, Chiyoda-ku, Tokyo Asahi Kasei Kogyo Within the corporation (56) References JP-A-53-34328 (JP, A) JP-A-61-250249 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E04C 3/04

Claims (2)

(57) [Claims] 1. A support member made of a thin steel plate having a predetermined length and fixed to a mounting hardware, wherein the support member is provided with a first flange and a second flange by bending both ends of a web. Ri 1 Na constitute the end surface shape of a substantially J or approximately inverted J-shaped by providing the third flange folded tip of the flange, the second
3 The distance from the tip of the flange to the web is a, the third
Measure the dimension from the base end on the bent side of the flange to the web.
b, where t is the thickness of the mounting hardware, a−b = t
A thin steel plate characterized by constituting a third flange in a relation
Made support member. 2. The thin steel plate supporting member according to claim 1, wherein a lip is formed by bending one or both of the second flange and the third flange.