JP4958597B2 - Residential floor beams - Google Patents
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- JP4958597B2 JP4958597B2 JP2007080335A JP2007080335A JP4958597B2 JP 4958597 B2 JP4958597 B2 JP 4958597B2 JP 2007080335 A JP2007080335 A JP 2007080335A JP 2007080335 A JP2007080335 A JP 2007080335A JP 4958597 B2 JP4958597 B2 JP 4958597B2
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Description
本発明は、住宅を構築する際の根太レス工法に用いる金属角パイプ製床小梁に関する。 The present invention relates to a metal square pipe floor beam used for a joist-less construction method when a house is constructed.
住宅等の床組においては、矩形枠状の桁梁に架け渡された床小梁上に床パネルを支える根太が架け渡されている。そして、このような桁梁，床小梁，根太には、従来、木材が用いられている。
しかしながら、近年、森林伐採等の環境破壊，経年変化や品質不良等、木材の持つ諸問題を考慮し、住宅メーカー等では、強度が高くしかも品質が安定しているという理由で、桁梁，床小梁，根太等として、鋼管等の金属角パイプ製のものを用いようとしている。
In a floor set of a house or the like, a joist that supports a floor panel is bridged on a floor beam spanned by a rectangular frame-shaped beam. Conventionally, wood is used for such girders, floor beams and joists.
However, in recent years, considering various problems of timber, such as environmental destruction such as deforestation, secular change and poor quality, housing manufacturers, etc. have high strength and stable quality. We are trying to use metal beams such as steel pipes as small beams and joists.
金属角パイプ製の桁梁，床小梁，根太等は、木材と比べて強度が格段に優れるため、それらの接合部を適宜形状に変形して用いれば、居住空間や断熱材・遮音材の挿入空間を広くすることができる、という付随的なメリットを得ることができる。一般的には、居住空間が極力広くなるように根太や床小梁の端部に段差部を設け、それぞれを床小梁や桁梁に接合している。
また、剛性の高い床パネルと、強度の高い金属角パイプ製の床小梁の使用により、根太の使用を省略した床組構造も提案されている。
Since metal square pipe girders, floor beams, joists, etc. are much stronger than wood, if their joints are transformed into appropriate shapes, they can be used for living spaces, heat insulating materials and sound insulation materials. The attendant advantage that the insertion space can be widened can be obtained. In general, stepped portions are provided at the ends of joists and floor beams so as to make the living space as large as possible, and these are joined to the floor beams and girders.
In addition, a floor structure in which the use of joists is omitted by using a floor panel with high rigidity and a floor beam made of high-strength metal square pipe has been proposed.
ところで床小梁等の端部に段差部を設ける態様としては、床小梁等の端部に、小梁等の長手方向に垂直な方向に切欠きを入れ、切欠いた先の部分に変形を加える方法が一般的である。このような手段で段差部を設けると、当該部分の強度が低下すとともに、桁梁との接合強度が低下する虞がある。段差部の強度低下を補うために、床小梁等の端部内側或いは外側に補強部材を配置することも行われているが、コスト高になっている。
そこで、本出願人等は、切欠きを設けることなく、すなわち強度低下を伴うことなく段差部を形成した住宅用資材を特許文献１で提案した。
Therefore, the present applicants have proposed a housing material in which a step portion is formed without providing a notch, that is, without a decrease in strength, in Patent Document 1.
特許文献１で提案した住宅用資材は、金属製角パイプの端部に所定長さの段差部が設けられたものであって、前記段差部は上面とその両側の相対向する側面に当該側面部がそれぞれ内方向に蛇腹状に折り込まれて形成されたつば部を有し、前記段差部の上面が資材中央部分の上面と斜面で連続していることを特徴としている。
また、当該住宅用資材は、金属製角パイプを当該角パイプの幅と同じか僅かに広い幅の凹溝を有するプレス下金型内に載置した後、前記角パイプの端部上面に所望段差部長さと同じ長さの押圧面を有するプレス上金型を押し当て、前記角パイプの相対向する側面部をそれぞれ当該角パイプの内方向に蛇腹状に折り込んでつば部を形成することにより、プレス上金型が押し当てられた角パイプ端部上面が当該角パイプの中央部分上面と斜面で連続された段差部を形作ることにより製造されている。
The housing material proposed in Patent Document 1 is provided with a step portion having a predetermined length at an end portion of a metal square pipe, and the step portion is provided on the upper surface and opposite side surfaces on both sides. Each of the portions has a collar portion formed by being folded in an inward bellows shape, and the upper surface of the stepped portion is continuous with the upper surface of the material central portion and the slope.
In addition, the housing material may be formed on the upper surface of the end portion of the square pipe after the metal square pipe is placed in a press mold having a concave groove having a width that is the same as or slightly wider than the square pipe. By pressing a press upper die having a pressing surface having the same length as the stepped portion length, and by folding the opposing side surface portions of the square pipe in the bellows shape inward of the square pipe, respectively, It is manufactured by forming a stepped portion in which the upper surface of the end portion of the square pipe against which the press upper die is pressed is continuous with the upper surface of the central portion of the square pipe and the inclined surface.
上記のような住宅用資材は、本来、床小梁の上に梁渡される根太用の資材として開発したものである。上面が平らになった段差部が形成されているために、この上面を下にして床小梁上に載置すると、安定的な載置構造が得られる。根太用の資材としては極めて有用なものとなっている。
ところで、上記したように剛性の高い床パネルを用い、根太の使用を省略して床組構造を構築しようとすると、強度の高い床小梁が必要である。しかも、桁梁との接合態様を想定するとき、空間の有効活用の観点から、床小梁の端部にも段差部を設けることが必要となる。
本発明は、このような問題を解消すべく案出されたものであり、金属製角パイプの端部に段差部が設けられた床小梁であって、段差部の形成によっても強度の低下がなく、むしろ段差部の形成で強度を高めた住宅用床小梁を低コストで提供することを目的とする。
The above-mentioned housing materials were originally developed as joist materials that are passed over the floor beams. Since a stepped portion having a flat upper surface is formed, a stable mounting structure can be obtained when the upper surface is placed on the floor beam. It is extremely useful as a material for joist.
By the way, when using a floor panel with high rigidity as described above and omitting the use of joists, it is necessary to provide a floor beam with high strength. Moreover, when assuming a joining mode with the girder beam, it is necessary to provide a stepped portion at the end of the floor beam from the viewpoint of effective use of space.
The present invention has been devised to solve such a problem, and is a floor beam provided with a stepped portion at the end of a metal square pipe, and the strength is reduced by the formation of the stepped portion. Rather, the object is to provide a low-cost residential floor beam with increased strength by forming a stepped portion.
本発明の住宅用床小梁は、その目的を達成するため、金属製角パイプの端部の一部が閉鎖され、当該金属製角パイプの上面上に床パネルを載置する床小梁であって、前記閉鎖構造が、金属製角パイプの上面と繋がる傾斜面と、傾斜面下方の金属製角パイプ両側面の一部がそれぞれ内方向に蛇腹状に折り込まれて形成されたつば部とから構成されているとともに、前記上面が変形されることなく平坦なままで前記傾斜面と繋がっていることを特徴とする。
金属製角パイプの端部開口部に、補強用プレートが冠着されていることが好ましい。さらに、当該補強用プレートに桁梁との接続用ボルト挿通孔が設けられていることが好ましい。
In order to achieve the object, a residential floor beam according to the present invention is a floor beam in which a part of an end of a metal square pipe is closed and a floor panel is placed on the upper surface of the metal square pipe. The closed structure includes an inclined surface connected to the upper surface of the metal square pipe, and a collar portion formed by folding a part of both side surfaces of the metal square pipe below the inclined surface into a bellows shape inwardly, respectively. And the upper surface is connected to the inclined surface while remaining flat without being deformed .
A reinforcing plate is preferably attached to the end opening of the metal square pipe. Furthermore, it is preferable that the reinforcing plate is provided with a bolt insertion hole for connection with the beam.
本発明の住宅用床小梁は、金属製角パイプに切り込みを入れることなくその上面から押圧されることにより、金属製角パイプの端部の一部が閉鎖され、その閉鎖構造が金属製角パイプの上面と繋がる傾斜面と、傾斜面下方の金属製角パイプ両側面の一部がそれぞれ内方向に蛇腹状に折り込まれて形成されたつば部とから構成された段差部を形作る形態となっている。端部に切り込みがなく、しかも両側にそれぞれ内方向に蛇腹状に折り込まれて形成されたつば部を有する傾斜面で端面の一部を閉鎖する構造を採用したため、強度低下がない住宅用床小梁が提供される。
さらに、前記住宅用床小梁の端部開口部に、接続用ボルト挿通孔が設けられた補強用プレートを冠着・固定したものとすると、桁梁の所定位置に組み付け、単なるボルト挿通処理のみで当該住宅用床小梁を桁梁に強固に接合することができる。
The residential floor beam of the present invention is pressed from its upper surface without making a cut into the metal square pipe, so that a part of the end of the metal square pipe is closed, and the closed structure is a metal square pipe. It forms a stepped part composed of an inclined surface connected to the upper surface of the pipe and a collar part formed by folding a part of both sides of the metal square pipe below the inclined surface in a bellows shape inwardly. ing. A small residential floor with no reduction in strength because it has a structure in which there is no notch at the end and a part of the end surface is closed by an inclined surface having a flange formed by folding inwardly on both sides. A beam is provided.
Furthermore, assuming that a reinforcing plate provided with a connecting bolt insertion hole is crowned and fixed at the end opening of the residential floor beam, it is assembled at a predetermined position of the beam, and only a bolt insertion process is performed. In this way, the residential floor beam can be firmly joined to the beam.
以下に、本発明金属製住宅用床小梁の好ましい端部形状を図面に基づいて説明する。
本発明の金属製住宅用床小梁は、特許文献１で提案した住宅用資材を基本としている。前記したように、特許文献１で提案した住宅用資材は、根太用として開発したものであって、図１に示したような構造を有するものを、形成した段差部５９の上面５８を下にして床小梁上に載置する形態で使用するものである。このため、段差部５９を形作る上面５８，基材角パイプの上面５１，及ぶ両者を繋ぐ傾斜面との間の成形精度はさほど問題とされなかった。
Below, the preferable edge part shape of the floor-beam for metal houses of this invention is demonstrated based on drawing.
The metal house floor beam according to the present invention is based on the house material proposed in Patent Document 1. As described above, the housing material proposed in Patent Document 1 was developed for joist and has the structure shown in FIG. 1 with the upper surface 58 of the formed stepped portion 59 facing down. It is used in the form of being placed on the floor beam. For this reason, the molding accuracy between the upper surface 58 that forms the stepped portion 59, the upper surface 51 of the base material square pipe, and the inclined surface that connects the two has not been a problem.
しかしながら、端部に段差部を設けた住宅用資材を、根太レスで床小梁として用いようとすると、基材角パイプの上面５１と傾斜面との間の成形精度が大きな問題となる。すなわち、図２に示すように、基材角パイプの上面５１上に床パネルを載置する形態となるため、基材角パイプの上面５１に繋がる傾斜面が精度良く形成されていないと、その上面に床パネルを安定的に載置できなくなる。いわゆるガタツキ状態となってしまう。また、段差部を長くする必要は全くない。床パネル載置用の上面５１を広くする意味では、段差部は却って短い方が効果的である。 However, when a housing material having a stepped portion at the end is used as a floor beam without a joist, the molding accuracy between the upper surface 51 of the base material square pipe and the inclined surface becomes a big problem. That is, as shown in FIG. 2, since the floor panel is placed on the upper surface 51 of the base material square pipe, the inclined surface connected to the upper surface 51 of the base material square pipe is not formed with high accuracy. The floor panel cannot be stably placed on the top surface. It becomes a so-called rattling state. Moreover, there is no need to lengthen the stepped portion. In order to widen the upper surface 51 for placing the floor panel, it is more effective to make the stepped portion shorter than the stepped portion.
このような観点から、本発明の住宅用床小梁は、金属製角パイプＭの端部の一部が閉鎖された床小梁であって、前記閉鎖構造３が、金属製角パイプの上面と繋がる傾斜面１と、傾斜面下方の金属製角パイプ両側面の一部がそれぞれ内方向に蛇腹状に折り込まれて形成されたつば部２とから構成されているとともに、前記上面が変形されることなく平坦なままで前記傾斜面と繋がっている構造を採用したものである。
図２に示すような態様で桁梁との接続構造を可能とするために、図３に示すような、前記住宅用床小梁の端部開口部に、好ましくは接続用ボルト挿通孔４が設けられた補強用プレート５を冠着・固定したものとした。
From this point of view, the residential floor beam of the present invention is a floor beam in which a part of the end portion of the metal square pipe M is closed, and the closing structure 3 is an upper surface of the metal square pipe. And a collar portion 2 formed by folding a part of both sides of the metal square pipe below the inclined surface into a bellows shape inwardly , and the upper surface is deformed. The structure which is connected with the said inclined surface remains flat without being used .
In order to enable a connection structure with a girder in the form as shown in FIG. 2, a connecting bolt insertion hole 4 is preferably provided at an end opening of the residential floor beam as shown in FIG. The reinforcing plate 5 provided was crowned and fixed.
次に、角管の管端につぶし加工を施して住宅用床小梁を成形する好ましい態様を、図面に基づいて説明する。
まず、用いる内金型の構造について説明する。
図４に示すように、内金型１０は、底面１１，該底面の一端に鈍角αを持って繋がるスライド面１３，該スライド面に繋がる押え上面１４，該押え上面に繋がる管端加工パンチ押え面１５及び該管端加工パンチ押え面と前記底面の他端に繋がる内金型押え面１６で外周面が形作られている。また、被加工角管の内側幅に等しい間隔の平行な側壁面を有するとともに、前記外周面を構成する底面１１と押え上面１４とは被加工角管の内側高さに等しい間隔で平行であり、管端加工パンチ押え面１５の下端とスライド面１３との間隔及び前記押え上面１４と前記スライド面１３との間隔よりも管端加工パンチ押え面１５の下端と底面１１との間隔を大きくした形状を有している。
Next, a preferred mode of forming a floor beam for a house by crushing the tube end of the square tube will be described with reference to the drawings.
First, the structure of the inner mold used will be described.
As shown in FIG. 4, the inner mold 10 includes a bottom surface 11, a slide surface 13 connected to one end of the bottom surface with an obtuse angle α, a presser upper surface 14 connected to the slide surface, and a tube end machining punch presser connected to the presser upper surface. The outer peripheral surface is formed by the surface 15 and the tube end machining punch pressing surface and the inner mold pressing surface 16 connected to the other end of the bottom surface. Moreover, it has parallel side wall surfaces with an interval equal to the inner side width of the square tube to be processed, and the bottom surface 11 and the presser upper surface 14 constituting the outer peripheral surface are parallel with an interval equal to the inner height of the square tube to be processed. The interval between the lower end of the tube end working punch presser surface 15 and the bottom surface 11 is made larger than the interval between the lower end of the tube end working punch presser surface 15 and the slide surface 13 and the interval between the upper surface 14 and the slide surface 13. It has a shape.
内金型１０の管端加工パンチ押え面１５は傾斜面とそれに続く湾曲凹面及び当該湾曲凹面に続く平坦面で構成されているものが好ましい。また、内金型１０の内金型押え面１６は、管端加工パンチ押え面１５の平坦面部と湾曲凸面で円滑に繋がる湾曲凹面及び当該湾曲凹面に続く平坦面で構成され、その端部は内金型１０の底面１１と湾曲凸面を介して円滑に繋がれていることが好ましい。 The tube end machining punch pressing surface 15 of the inner die 10 is preferably composed of an inclined surface, a curved concave surface that follows it, and a flat surface that follows the curved concave surface. Further, the inner mold pressing surface 16 of the inner mold 10 is constituted by a curved concave surface that is smoothly connected by the flat surface portion of the tube end processing punch pressing surface 15 and the curved convex surface, and a flat surface following the curved concave surface, It is preferable that the inner mold 10 is smoothly connected to the bottom surface 11 via the curved convex surface.
前記底面１１とスライド面１３との接続点（接続ライン）１２は内金型１０を回転させるための支点となるものである。内金型１０の、後述の管端への挿入，排出の行いやすさや、押え上面１４を被加工角管の内側上壁面に確実に当接されるためには、前記底面１１スライド面１３の接続角度は１２０〜１５０°程度とすることが好ましい。
内金型押え及び管端加工パンチの形状はさほど大きな問題となるものではない。内金型押えは、内金型１の前記内金型押え面１６に合致した先端形状を有するものが好ましいし、管端加工パンチは、内金型１の管端加工パンチ押え面１５の合致した先端形状を有するものが好ましい。
A connection point (connection line) 12 between the bottom surface 11 and the slide surface 13 is a fulcrum for rotating the inner mold 10. In order to facilitate the insertion and discharge of the inner mold 10 into the tube end, which will be described later, and to ensure that the presser upper surface 14 is brought into contact with the inner upper wall surface of the square tube to be processed, The connection angle is preferably about 120 to 150 °.
The shapes of the inner die presser and the tube end machining punch are not a big problem. The inner mold presser preferably has a tip shape that matches the inner mold pressing surface 16 of the inner mold 1, and the tube end processing punch matches the tube end processing punch pressing surface 15 of the inner mold 1. Those having the tip shape are preferred.
次に、上記のような金型を用いて角管管端につぶし加工を施す方法について説明する。
被加工角管Ｍの管端に、内金型１を挿入する。この際、図５の（ａ）に示すように、内金型１０のスライド面１３を被加工角管の内側底壁面に沿わせる形態で、内金型１０の底面１１とスライド面１３との接続部が角管の内側に位置する深さまで挿入することが好ましい。
Next, a method for crushing the end of the square tube using the above mold will be described.
The inner mold 1 is inserted into the tube end of the square tube M to be processed. At this time, as shown in FIG. 5A, the slide surface 13 of the inner mold 10 is arranged along the inner bottom wall surface of the square tube to be processed, and the bottom surface 11 of the inner mold 10 and the slide surface 13 are aligned. It is preferable to insert the connecting portion to a depth where the connecting portion is located inside the square tube.
内金型１０を挿入後、図５の（ｂ）に示すように、内金型押え２０を内金型１０の内金型押え面１６に押付ける。内金型押え面１６が上方から押下げられると、内金型１０は、底面１１とスライド面１３の接続点１２を支点として回転され、被加工角管Ｍの管端にセットされる。そして、底面１１と押え上面１４とは被加工角管Ｍの内側高さに等しい間隔で平行関係にあるため、内金型１０の底面１１が被加工角管Ｍの内側底壁面に、押え上面１４が被加工角管Ｍの内側上壁面に当接されることになる。 After inserting the inner mold 10, the inner mold retainer 20 is pressed against the inner mold retainer surface 16 of the inner mold 10 as shown in FIG. When the inner mold pressing surface 16 is pushed down from above, the inner mold 10 is rotated with the connection point 12 between the bottom surface 11 and the slide surface 13 as a fulcrum, and is set at the tube end of the square tube M to be processed. Since the bottom surface 11 and the upper surface 14 of the presser are parallel to each other at an equal interval to the inner height of the square tube M to be processed, the bottom surface 11 of the inner mold 10 is placed on the inner bottom wall surface of the square tube M to be processed. 14 is brought into contact with the inner upper wall surface of the square tube M to be processed.
内金型１０をセットした状態、すなわち内金型押え２０を内金型１０の内金型押え面１６に押付けた状態で、図５の（ｃ）に示すように、管端加工パンチ３０を被加工角管Ｍの管端上面に押付ける。被加工角管Ｍの管端上面が内金型１０の管端加工パンチ押え面１５の形状に沿って変形されるとき、被加工角管Ｍの管端壁は内金型１０で拘束されているため、管端側壁の上部部分のみが内方向に蛇腹状に折り込まれるような変形を伴う。
このような変形により、端部に切り込みがなく、しかも両側にそれぞれ内方向に蛇腹状に折り込まれて形成されたつば部を有する傾斜面で端面の一部が閉鎖された形態の管端構造が得られる。
なお、この変形過程で、内金型１０の押え上面１４は被加工角管Ｍの上面内壁に当接したままなので、傾斜面より内側の被加工角管Ｍ上面の変形は防止される。
With the inner mold 10 set, that is, with the inner mold retainer 20 pressed against the inner mold retainer surface 16 of the inner mold 10, as shown in FIG. Press against the upper end of the tube M to be processed. When the tube end upper surface of the processed square tube M is deformed along the shape of the tube end processing punch pressing surface 15 of the inner mold 10, the tube end wall of the processed square tube M is restrained by the inner mold 10. Therefore, only the upper part of the pipe end side wall is deformed so as to be folded inwardly in a bellows shape.
Due to such a deformation, there is a tube end structure in which a part of the end surface is closed by an inclined surface having a flange portion that is not cut at the end portion and is formed by being folded inwardly on both sides in a bellows shape. can get.
In this deformation process, the upper surface 14 of the inner mold 10 remains in contact with the inner wall of the upper surface of the square tube M to be processed, so that the upper surface of the square tube M to be processed inside the inclined surface is prevented.
次に、管端加工パンチ３０を被加工角管Ｍの管端上面に押付けた状態で、図５の（ｄ）に示すように、内金型押え２０を上方に引上げ、内金型押え２０の内金型押え面１６への押付け状態を解除する。内金型押え２０を上方に引上げることにより、内金型１０のセット状態も解除さることになる。
さらに、管端加工パンチ３０を被加工角管Ｍの管端上面に押付けた状態で、セット状態を解除された内金型１０を排出させる。
Next, in a state where the tube end processing punch 30 is pressed against the upper surface of the tube end of the square tube M to be processed, as shown in FIG. 5D, the inner mold retainer 20 is pulled upward, and the inner mold retainer 20 The pressing state on the inner mold pressing surface 16 is released. By pulling up the inner mold retainer 20, the set state of the inner mold 10 is also released.
Further, in a state where the tube end processing punch 30 is pressed against the upper surface of the tube end of the processed square tube M, the inner mold 10 released from the set state is discharged.
ところで、内金型１０は、その管端加工パンチ押え面１５の下端とスライド面１３との間隔及び前記押え上面１４と前記スライド面１３との間隔よりも管端加工パンチ押え面１５の下端と底面１１との間隔が大きくなるような形状とされている。
したがって、管端加工の後、内金型１０を排出するとき、一部閉ざされた管端の閉鎖部下端が、内金型１０の排出の邪魔になることはない。
内金型１０の排出の後、管端加工パンチ押え面１５を引上げることにより、管端つぶし加工を終える。
By the way, the inner die 10 has a lower end of the tube end working punch pressing surface 15 than a distance between the lower end of the tube end processing punch pressing surface 15 and the slide surface 13 and a distance between the pressing upper surface 14 and the slide surface 13. It is made into the shape where the space | interval with the bottom face 11 becomes large.
Therefore, when the inner die 10 is discharged after the tube end processing, the lower end of the closed portion of the closed tube end does not obstruct the discharge of the inner die 10.
After the inner mold 10 is discharged, the pipe end crushing process is finished by pulling up the pipe end machining punch pressing surface 15.
上記したように、本発明では、特殊形状の回転可能な内金型を用いることにより、閉じる部分以外の変形を極力抑制して角管管端をつぶし、一部を閉鎖した管端部を得ることができる。なお、内金型１０の管端加工パンチ押え面１５平坦面部を長く採り、管端加工パンチ３０の押え位置を管端より内側とすると、広い段差部を有する管端形状が得られる。
端部に切り込みを形成することなく、管端両側にそれぞれ内方向に蛇腹状に折り込まれて形成されたつば部を有する傾斜面で端面の一部を閉鎖する構造の管端部を形成しているので、強度低下がない角管が提供されることになる。
As described above, in the present invention, by using a specially shaped rotatable inner mold, deformation other than the closed portion is suppressed as much as possible to crush the square tube end, and a partially closed tube end is obtained. be able to. If the flat end portion of the pipe end machining punch pressing surface 15 of the inner die 10 is long and the pressing position of the pipe end machining punch 30 is set inside the pipe end, a pipe end shape having a wide stepped portion is obtained.
Forming a tube end portion with a structure in which a part of the end surface is closed with an inclined surface having a flange portion formed by being folded inwardly on each side of the tube end without forming a cut at the end portion. As a result, a square tube without strength reduction is provided.
桁梁との接続構造を強固なものとするためには、端部開口部に補強用プレートを冠着させることが好ましい。角管の管端部を所定の形状に成形した後、図３に示すように、管端の開口部にボルト挿通孔が設けられた溝形の補強プレートを冠着し、管端側面部に溶接やかしめ加工などの乾式接合などにより固定すれば良い。これにより頑強な住宅用床小梁が得られる。
そして、図２に示すように、補強用プレートを接合した本発明の住宅用床小梁は、補強プレートに設けたボルト挿通孔を通じてボルトにより桁梁に接合する。
本発明の床小梁を所定の間隔で桁梁に固定し、この床小梁の上に床パネルを配置することで住宅用の床組みを形成する。
In order to strengthen the connection structure with the girder, it is preferable to attach a reinforcing plate to the end opening. After forming the tube end portion of the square tube into a predetermined shape, as shown in FIG. 3, a groove-shaped reinforcing plate provided with a bolt insertion hole is attached to the opening portion of the tube end, and the side surface portion of the tube end is attached. What is necessary is just to fix by dry-type joinings, such as welding and caulking. This provides a robust residential floor beam.
As shown in FIG. 2, the residential floor beam of the present invention to which the reinforcing plate is joined is joined to the girder beam by a bolt through a bolt insertion hole provided in the reinforcing plate.
The floor beam of the present invention is fixed to a girder beam at a predetermined interval, and a floor panel is arranged on the floor beam to form a residential floor assembly.
金属製角パイプとして、板厚１．６ｍｍの溶融Ｚｎ系めっき鋼板を素材とした□１２５ｍｍ×７５ｍｍの溶接管を用い、両端を内方向に蛇腹状に折り込まれて形成されたつば部を有する傾斜面で端面の一部が閉鎖された形態の管端構造の床小梁を製造した。
また、比較材として、桁梁との接合を想定して角管端部の一部を切り欠き、補強プレートを溶接した床小梁を製造した（図１の態様）。
As a metal square pipe, a □ 125mm x 75mm welded pipe made of a hot-dip Zn-based plated steel sheet with a thickness of 1.6mm is used, and a slant having a flange formed by folding both ends inwardly in a bellows shape. A floor beam with a pipe end structure in which a part of the end face was closed at the face was manufactured.
Further, as a comparative material, a floor small beam was manufactured by cutting out a part of the end portion of the square tube and welding a reinforcing plate, assuming joining with a girder beam (aspect of FIG. 1).
前記の本発明の床小梁と比較材の床小梁を用いて、根太レスの床組み試験体を作製した。それぞれの試験体について、図６に示すような水平構面剛性試験を実施した。この水平構面剛性試験は、地震力や風圧力などによる水平力を想定した試験である。試験体の水平構面に変位量８〜１００ｍｍ、速度３〜４ｍｍ／ｍｉｎで正負の交番荷重を与え、その際の反力を測定し剛性を評価した。
その結果を図７に示す。
これより、各変位量において本発明の床小梁を使用した床組みの方が比較材の床小梁を使用したものより剛性が優れていることがわかる。
Using the floor beam of the present invention and the floor beam of comparative material, a joist-less floor assembly test body was produced. A horizontal structural rigidity test as shown in FIG. 6 was performed on each specimen. This horizontal structural rigidity test is a test assuming a horizontal force such as seismic force or wind pressure. A positive and negative alternating load was applied to the horizontal surface of the test body at a displacement of 8 to 100 mm and a speed of 3 to 4 mm / min, and the reaction force at that time was measured to evaluate the rigidity.
The result is shown in FIG.
From this, it can be seen that the floor assembly using the floor beam of the present invention is superior in rigidity to the displacement using the comparative floor beam.
１：傾斜面１ ２：つば部 ３：閉鎖構造
１０：内金型 １１：底面 １２：底面とスライド面の接続点 １３：スライド面
１４：押え上面 １５：管端加工パンチ押え面 １６：内金型押え面
２０：内金型押え ３０：管端加工パンチ Ｍ：被加工角管
1: Inclined surface 1 2: Collar part 3: Closure structure
10: Inner mold 11: Bottom surface 12: Connection point between bottom surface and slide surface 13: Slide surface 14: Presser upper surface 15: Pipe end machining punch press surface 16: Inner mold presser surface
20: Inner die presser 30: Tube end processing punch M: Square tube to be processed
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| JP2007080335A JP4958597B2 (en) | 2007-03-26 | 2007-03-26 | Residential floor beams |
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| JP2007080335A JP4958597B2 (en) | 2007-03-26 | 2007-03-26 | Residential floor beams |
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| JP4683414B2 (en) * | 2005-05-30 | 2011-05-18 | 日新製鋼株式会社 | Metal base material and manufacturing method thereof |
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