JP3984911B2 - Floor structure material - Google Patents

Floor structure material Download PDF

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Publication number
JP3984911B2
JP3984911B2 JP2002364408A JP2002364408A JP3984911B2 JP 3984911 B2 JP3984911 B2 JP 3984911B2 JP 2002364408 A JP2002364408 A JP 2002364408A JP 2002364408 A JP2002364408 A JP 2002364408A JP 3984911 B2 JP3984911 B2 JP 3984911B2
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Japan
Prior art keywords
void
mounting member
floor structure
fixed
bent
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JP2002364408A
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JP2004197338A (en
Inventor
太郎 河西
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太郎 河西
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B5/326Floor structures wholly cast in situ with or without form units or reinforcements with hollow filling elements

Description

【0001】
【発明が属する技術分野】
この発明は、コンクリート床版の構築に使用する型枠と、自立型トラスと、ボイドよりなる床構造材に関し、特に、ボイドを固定する構造に関する。
【0002】
【従来の技術】
型枠および自立型トラスよりなる床構造材を使用してコンクリートを打設して床スラブを構築する際に、床版の軽量化および配線・配管のために、床版にボイドを埋設して床スラブを構築することが実施されている。
【0003】
特開2001-303707号公報により、型枠および自立型トラスよりなる床構造材にボイドを固定した床構造材が提案されている。
【0004】
図8の正面図に示すように、1本の上弦筋11と2本の下弦筋12を上下に平行に配置し、波形に屈曲させた2本のラチス筋13の上側屈曲部を上弦筋11に溶接し、2本のラチス筋13の下部を下弦筋12に溶接するとともに、下側屈曲部15を水平に曲げて自立型トラス1を構成し、この自立型トラス1の下側屈曲部15を鉄板よりなる型枠2に溶接して床構造材を形成する。
【0005】
この床構造材において、平行に配置された自立型トラス1の間に、ボイド8を固定するために、ボイド8の下側を支持する円弧状に曲げた支持筋6の両端の屈曲部61を隣接する自立型トラス1の上弦筋11に掛け渡して、この支持筋6の上にボイド8を載せる。
【0006】
コンクリートを打設する際に、比重が大きいコンクリートによりボイド8に浮力が作用して浮き上がるので、ボイド8の上側を押さえ付けるために、円弧状に曲げた押さえ筋7をボイド8の上側に載せ、押さえ筋7の両端の屈曲部71を隣接する自立型トラス1の下弦筋12に掛け渡してボイド8を固定している。
【0007】
【発明が解決しようとする課題】
このようなボイド支持構造によると、自立型トラス1の間隔が変わったり、太さが異なるボイド8に適用するために、各種寸法の支持筋6および押さえ筋7を用意しなければならず、支持筋6および押さえ筋7を手作業により掛け渡さなければならなかった。そこで、この発明は、このような課題を解決するために考えられたものである。
【0008】
【課題を解決するための手段】
この発明の床構造材は、平行な複数の自立型トラスを型枠に固定した床構造材において、隣接する自立型トラスの中間に、帯鋼を曲げた平坦な底面を有するU字形のボイド取付部材を載せ、このボイド取付部材の上記平坦な底面を上記型枠に固定し、ボイド取付部材のU字形の開口部にボイドを落とし込み、ボイドの側面に沿わせるようにボイド取付部材の開放端を曲げて、端部の近くをスポット溶接してボイドを固定したものである。
【0009】
この発明の他の実施形態の床構造材は、平行な複数の自立型トラスを型枠に固定した床構造材において、隣接する自立型トラスの中間に、帯鋼を平坦な底面となる部分の両側を上向きにU字形に曲げ、一方の立上り部分を底面から所定高さ位置で内側に曲げ、さらに円弧状に曲げたボイド取付部材を2つ対向させて載せ、この2つのボイド取付部材の上記平坦な底面を上記型枠に固定し、ボイド取付部材の対向する2つの円弧面にボイドを落とし込み、ボイドの側面に沿わせるようにボイド取付部材の開放端を曲げて、端部の近くをスポット溶接してボイドを固定したものである。
【0010】
【発明の実施の形態】
(第1の実施形態)
図1(a)に示すように、デッキプレート、キーストンプレート、リブプレートなどの平行な複数の溝型を形成した鉄板の型枠2を予め用意するとともに、1本の上弦筋11と2本の下弦筋12を上下に三角形に配置し、波形に屈曲させた2本のラチス筋13をその上側屈曲部14で上弦筋11を挟むように山形に添設して、両ラチス筋13の上側屈曲部14を上弦筋11にそれぞれ溶接し、両ラチス筋13の下部を2本の下弦筋12にそれぞれ溶接した自立型トラス1を用意する。
【0011】
そして、型枠2の上に複数の自立型トラス1を平行に配列し、自立型トラス1の両ラチス筋13の下側屈曲部15を型枠2に溶接して床構造材を形成する。
【0012】
図1(b)に示すように、帯鋼を曲げて平坦な底面31を有するU字形のボイド取付部材3aを作る。
【0013】
または、図1(c)に示すように、帯鋼を曲げて平坦な底面31を有するL字形のボイド取付部材3bを作る。
【0014】
そして、図2に示すように、このボイド取付部材3(3aまたは3b)を隣接する自立型トラス1の中間に自立型トラス1と交差する方向に複数個載せ、平坦な底面31を型枠2の上面に溶接して固定する。
【0015】
図3に示すように、平行に配列された複数の自立型トラス1を横切るように、自立型トラス1の下弦筋12の上に位置決め用鉄筋16を挿通し、U字形を成すボイド取付部材3の開放端32の間を経て、位置決め用鉄筋16の上にボイド8を載せる。
【0016】
図4に示すように、ボイド8の側面に沿わせるように、ボイド取付部材3の開放端32を曲げて、端部の近くをスポット溶接▽または鋲止めしてボイド8を固定する。
【0017】
そして、この床構造材を横梁の間に架け渡し、鉄板2を捨て型枠としてコンクリートを打設して床スラブを構築するのである。
【0018】
(第2の実施形態)
第1の実施形態においては、ボイド取付部材3の他にボイド8を位置決めするための鉄筋16を必要としているが、第2の実施形態においては、ボイド取付部材4によりボイド8を位置決めするように構成したものである。
【0019】
このボイド取付部材4は、図5に示すように、帯鋼を曲げ加工したものであって、図5(a)に示すように、平坦な底面41となる部分の両側を上向きにU字形に曲げ、図5(b)に示すように、一方の立上り部分42を底面から高さDの位置で内側に曲げ、さらに円弧状に曲げて受面43を形成したものである。
【0020】
また、このボイド取付部材4として、図5(c)に示すように、予めループ状に形成した帯鋼を曲げ加工して、平坦な底面41と円弧状のボイドの受面43とを形成してもよいのである。
【0021】
図6に示すように、円弧状に曲げた受面43が対向するように、2つのボイド取付部材4を、隣接する自立型トラス1の中間に自立型トラス1と交差する方向に複数個載せ、各平坦な底面41を型枠2の上面に溶接または鋲止めして固定する。
【0022】
このように、2つのボイド取付部材4を対向させて固定すると、2つの円弧状に曲げた受面43が略半円のボイド受けを形成するので、ここにボイド8を載せる。このとき、ボイド8は、型枠2より高さDに位置決めされる。
【0023】
図7に示すように、ボイド8の側面に沿わせるように、ボイド取付部材4の開放端44を曲げて、端部の近くをスポット溶接▽してボイド8を固定する。
【0024】
そして、この床構造材を横梁の間に架け渡し、鉄板2を捨て型枠としてコンクリートを打設して床スラブを構築するのである。
【0025】
【発明の効果】
以上の実施の形態に基づく説明から明らかなように、この発明におけるボイド取付部材は、自立型トラス1の間隔が変わっても、太さが異なるボイドにも適用することができるものであり、かつ、ボイドの取付作業が溶接により簡便に行うことができる。
【図面の簡単な説明】
【図1】型枠に自立型トラスを固定した床構造材を示す正面図(a)、この発明のボイド取付部材の第1の実施形態を示す正面図(b)(c)、
【図2】この発明のボイド取付部材を床構造材に固定した状態を示す正面図、
【図3】この発明のボイド取付部材を有する床構造材にボイドを載せた状態を示す正面図、
【図4】この発明の第1の実施形態のボイド取付部材によりボイドを床構造材に固定した状態を示す正面図、
【図5】この発明のボイド取付部材の第2の実施形態の加工工程を示す正面図、
【図6】この発明の第2の実施形態のボイド取付部材を床構造材に固定した状態を示す正面図、
【図7】この発明の第2の実施形態のボイド取付部材によりボイドを床構造材に固定した状態を示す正面図、
【図8】従来のボイド取付部材によりボイドを床構造材に固定した状態の一例を示す正面図である。
【符号の説明】
1 自立型トラス
11 上弦筋
12 下弦筋
13 ラチス筋
14 上側屈曲部
15 下側屈曲部
2 型枠
3 ボイド取付部材
4 ボイド取付部材
8 ボイド
[0001]
[Technical field to which the invention belongs]
The present invention relates to a formwork used for construction of a concrete floor slab, a self-supporting truss, and a floor structure material including voids, and more particularly to a structure for fixing voids.
[0002]
[Prior art]
When constructing a floor slab by placing concrete using a floor structure material consisting of a formwork and a self-supporting truss, voids are buried in the floor slab to reduce the weight of the slab and to wire and pipe it. Building floor slabs is being implemented.
[0003]
Japanese Laid-Open Patent Publication No. 2001-303707 proposes a floor structure material in which a void is fixed to a floor structure material made of a mold and a self-supporting truss.
[0004]
As shown in the front view of FIG. 8, one upper chord 11 and two lower chords 12 are arranged in parallel vertically, and the upper bent portion of the two lattice muscles 13 bent into a waveform is the upper chord 11. And the lower part of the two lattices 13 is welded to the lower chord 12 and the lower bent part 15 is bent horizontally to form the self-supporting truss 1, and the lower bent part 15 of the self-supporting truss 1 Is welded to a mold 2 made of an iron plate to form a floor structure material.
[0005]
In this floor structure material, in order to fix the void 8 between the self-supporting trusses 1 arranged in parallel, the bent portions 61 at both ends of the support muscle 6 bent in an arc shape supporting the lower side of the void 8 are provided. The void 8 is placed on the support muscle 6 over the upper chord 11 of the adjacent self-supporting truss 1.
[0006]
When placing concrete, buoyancy acts on the void 8 due to the concrete having a large specific gravity, so that it floats up. Therefore, in order to press the upper side of the void 8, the presser bar 7 bent in an arc shape is placed on the upper side of the void 8. The bent portions 71 at both ends of the presser bar 7 are stretched over the lower chord 12 of the adjacent self-supporting truss 1 to fix the void 8.
[0007]
[Problems to be solved by the invention]
According to such a void support structure, the support bars 6 and presser bars 7 of various dimensions must be prepared in order to be applied to the voids 8 having different intervals or different thicknesses. The muscle 6 and the presser bar 7 had to be handed over. The present invention has been conceived to solve such problems.
[0008]
[Means for Solving the Problems]
The floor structure material of the present invention is a floor structure material in which a plurality of parallel self-supporting trusses are fixed to a formwork, and a U-shaped void attachment having a flat bottom surface obtained by bending a steel strip in the middle of adjacent self-supporting trusses. Place the member, fix the flat bottom surface of the void mounting member to the formwork, drop the void into the U-shaped opening of the void mounting member, and place the open end of the void mounting member along the side of the void It is bent and spot welded near the end to fix the void.
[0009]
The floor structure material according to another embodiment of the present invention is a floor structure material in which a plurality of parallel self-supporting trusses are fixed to a formwork. Bend both sides upward in a U-shape, bend one rising part inward at a predetermined height from the bottom, and then place two oppositely bent void mounting members facing each other. Fix the flat bottom surface to the above-mentioned formwork, drop the void into the two opposing arc surfaces of the void mounting member, bend the open end of the void mounting member along the side of the void, and spot near the end The void is fixed by welding.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
As shown in FIG. 1 (a), an iron plate mold 2 having a plurality of parallel groove molds such as a deck plate, a keystone plate, and a rib plate is prepared in advance, and one upper chord 11 and two The lower chord 12 is arranged in a triangle, and two lattice muscles 13 bent in a wave shape are attached to the mountain shape so that the upper chord 11 is sandwiched between the upper bent portions 14, and the upper flexion of both lattice muscles 13 A self-supporting truss 1 is prepared by welding the portion 14 to the upper chord muscle 11 and welding the lower part of both lattice muscles 13 to the two lower chord muscles 12 respectively.
[0011]
Then, a plurality of self-supporting trusses 1 are arranged in parallel on the mold 2 and the lower bent portions 15 of both lattice bars 13 of the self-supporting truss 1 are welded to the mold 2 to form a floor structure material.
[0012]
As shown in FIG.1 (b), the steel strip is bent and the U-shaped void attachment member 3a which has the flat bottom face 31 is made.
[0013]
Alternatively, as shown in FIG. 1C, the steel strip is bent to make an L-shaped void attachment member 3b having a flat bottom surface 31.
[0014]
Then, as shown in FIG. 2, a plurality of the void attachment members 3 (3a or 3b) are placed in the middle of the adjacent self-supporting truss 1 in a direction intersecting the self-supporting truss 1, and a flat bottom surface 31 is formed on the mold 2 Weld and fix it on the top surface.
[0015]
As shown in FIG. 3, a positioning rebar 16 is inserted over the lower chord 12 of the self-supporting truss 1 so as to cross a plurality of self-supporting truss 1 arranged in parallel, and a void mounting member 3 having a U-shape is formed. The void 8 is placed on the positioning rebar 16 after passing through the open end 32.
[0016]
As shown in FIG. 4, the open end 32 of the void attachment member 3 is bent so as to be along the side surface of the void 8, and the void 8 is fixed by spot welding 鋲 or pinching near the end.
[0017]
And this floor structure material is bridged between the cross beams, and the floor slab is constructed by placing concrete with the iron plate 2 being discarded as a formwork.
[0018]
(Second Embodiment)
In the first embodiment, the reinforcing bar 16 for positioning the void 8 is required in addition to the void mounting member 3. However, in the second embodiment, the void 8 is positioned by the void mounting member 4. It is composed.
[0019]
As shown in FIG. 5, the void mounting member 4 is formed by bending a steel strip. As shown in FIG. 5 (a), both sides of the portion that becomes the flat bottom surface 41 are U-shaped upward. Bending, as shown in FIG. 5 (b), one rising portion 42 is bent inward from the bottom surface at a height D, and further bent into an arc shape to form a receiving surface 43.
[0020]
Further, as shown in FIG. 5 (c), as the void attachment member 4, a steel strip previously formed in a loop shape is bent to form a flat bottom surface 41 and an arcuate void receiving surface 43. It may be.
[0021]
As shown in FIG. 6, a plurality of two void attachment members 4 are placed in the direction intersecting the self-supporting truss 1 in the middle of the adjacent self-supporting truss 1 so that the receiving surfaces 43 bent in an arc shape face each other. Each flat bottom surface 41 is fixed to the upper surface of the mold 2 by welding or clamping.
[0022]
Thus, when the two void attachment members 4 are opposed and fixed, the two arcuate receiving surfaces 43 form a substantially semicircular void receiver, and the void 8 is placed thereon. At this time, the void 8 is positioned at a height D from the mold 2.
[0023]
As shown in FIG. 7, the open end 44 of the void attachment member 4 is bent so as to be along the side surface of the void 8, and the void 8 is fixed by spot welding near the end.
[0024]
And this floor structure material is bridged between the cross beams, and the floor slab is constructed by placing concrete with the iron plate 2 being discarded as a formwork.
[0025]
【The invention's effect】
As is clear from the description based on the above embodiment, the void attachment member in the present invention can be applied to voids having different thicknesses even if the interval of the self-supporting truss 1 is changed, and The void can be easily attached by welding.
[Brief description of the drawings]
FIG. 1A is a front view showing a floor structure material in which a self-supporting truss is fixed to a mold, and FIG. 1B is a front view showing a first embodiment of a void mounting member of the present invention;
FIG. 2 is a front view showing a state in which the void mounting member of the present invention is fixed to a floor structure material;
FIG. 3 is a front view showing a state in which a void is placed on a floor structure material having a void mounting member of the present invention;
FIG. 4 is a front view showing a state in which the void is fixed to the floor structure material by the void mounting member according to the first embodiment of the present invention;
FIG. 5 is a front view showing the processing steps of the second embodiment of the void attachment member of the present invention;
FIG. 6 is a front view showing a state in which a void mounting member according to a second embodiment of the present invention is fixed to a floor structure material;
FIG. 7 is a front view showing a state in which the void is fixed to the floor structure material by the void mounting member according to the second embodiment of the present invention;
FIG. 8 is a front view showing an example of a state in which a void is fixed to a floor structure material by a conventional void attachment member.
[Explanation of symbols]
1 Self-supporting truss
11 First quarter muscle
12 Lower chord
13 Lattice muscle
14 Upper bend
15 Lower bending part 2 Formwork 3 Void mounting member 4 Void mounting member 8 Void

Claims (3)

平行な複数の自立型トラスを型枠に固定した床構造材において、
隣接する自立型トラスの中間に、帯鋼を曲げた平坦な底面を有するボイド取付部材を載せ、該ボイド取付部材の上記平坦な底面を上記型枠に固定し、ボイド取付部材のU字形の開口部にボイドを落とし込み、ボイドの側面に沿わせるようにボイド取付部材の開放端を曲げて、端部の近くをスポット溶接してボイドを固定することを特徴とする床構造材。
In floor structure materials in which a plurality of parallel free-standing trusses are fixed to a formwork,
A void mounting member having a flat bottom surface obtained by bending a steel strip is placed between adjacent self-supporting trusses, the flat bottom surface of the void mounting member is fixed to the formwork, and a U-shaped opening of the void mounting member is provided. A floor structure material in which a void is dropped into a portion, the open end of the void attachment member is bent so as to follow the side surface of the void, and the void is fixed by spot welding near the end portion.
平行な複数の自立型トラスを型枠に固定した床構造材において、
隣接する自立型トラスの中間に、帯鋼を平坦な底面となる部分の両側を上向きにU字形に曲げ、一方の立上り部分を底面から所定高さ位置で内側に曲げ、さらに円弧状に曲げたボイド取付部材を2つ対向させて載せ、該2つのボイド取付部材の上記平坦な底面を上記型枠に固定し、ボイド取付部材の対向する2つの円弧面にボイドを落とし込み、ボイドの側面に沿わせるようにボイド取付部材の開放端を曲げて、端部の近くをスポット溶接してボイドを固定することを特徴とする床構造材。
In floor structure materials in which a plurality of parallel free-standing trusses are fixed to a formwork,
In the middle of the adjacent self-supporting truss, the steel strip was bent into a U-shape with the flat bottom part facing upward, and one rising part was bent inward at a predetermined height from the bottom, and then bent into an arc. Two void mounting members are placed facing each other, the flat bottom surfaces of the two void mounting members are fixed to the formwork, the voids are dropped into two opposing arc surfaces of the void mounting member, and along the side surfaces of the voids. The floor structure material characterized by bending the open end of the void mounting member so as to cause the spot to be spot-welded near the end and fixing the void.
平行な複数の自立型トラスを型枠に固定した床構造材において、
隣接する自立型トラスの中間に、予めループ状に形成した帯鋼を曲げ加工して、平坦な底面と円弧状の受面とを形成したボイド取付部材の上記平坦な底面を上記型枠に固定し、ボイド取付部材の円弧状の受面にボイドを載せ、ボイドの側面に沿わせるようにボイド取付部材の開放端を曲げて、端部の近くをスポット溶接してボイドを固定することを特徴とする床構造材。
In floor structure materials in which a plurality of parallel free-standing trusses are fixed to a formwork,
Bending the steel strip previously formed in a loop shape in the middle of the adjacent self-supporting truss, and fixing the flat bottom surface of the void mounting member formed with a flat bottom surface and an arcuate receiving surface to the formwork The void is mounted on the arc-shaped receiving surface of the void mounting member, the open end of the void mounting member is bent along the side of the void, and the void is fixed by spot welding near the end. Floor structure material.
JP2002364408A 2002-12-16 2002-12-16 Floor structure material Expired - Fee Related JP3984911B2 (en)

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CN103088948A (en) * 2013-02-06 2013-05-08 浙江锐博建材有限公司 Floor plate truss pouring structure
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