JP2023062776A - Coupling joint structure of square steel pipe column - Google Patents

Coupling joint structure of square steel pipe column Download PDF

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JP2023062776A
JP2023062776A JP2021172870A JP2021172870A JP2023062776A JP 2023062776 A JP2023062776 A JP 2023062776A JP 2021172870 A JP2021172870 A JP 2021172870A JP 2021172870 A JP2021172870 A JP 2021172870A JP 2023062776 A JP2023062776 A JP 2023062776A
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nut
steel pipe
plate
square steel
pipe column
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幹夫 田代
Mikio Tashiro
一真 森山
Kazuma Moriyama
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Abstract

To provide a nut retaining disk capable of coping with a stable joint strength and a position change of a bolt in a minute range by tightening a nut of the nut retaining disk provided on the doubling plate on an inner surface wall in a column joint area in a method by tightening a head of a high-strength bolt from an outside of a square steel pipe column.SOLUTION: In a structure, a lower half of a doubling plate having a nut retaining disk is attached to an inner surface wall of a joint area of a lower square steel pipe column, the doubling plate is fixed with a high-strength bolt inserted from an outer surface side of the square steel column and a nut provided on the nut retaining disk, an outer surface of the doubling plate protruding upward from the inner surface wall of the lower square steel pipe column is covered with a lower end of an upper square steel pipe column, and the high-strength bolt inserted from an outer surface side of the upper square steel column is screwed by the nut provided on the nut retaining disk. The doubling plate is provided with the nut retaining disk formed by overlapping a nut restraining plate provided with a cutout processing larger than a nut shape and a corrugated nut cover, so that the nut corresponds to a position change of the bolt.SELECTED DRAWING: Figure 1

Description

本発明は、鉄骨構造建築に角形鋼管を柱材として用いて、特に、角形鋼管柱の継手接合を行う場合に於いて、角形鋼管柱の外面側から挿入した高力ボルトに、接合領域内面壁の添え板に設けているナット保持盤のナットが螺合する、高力ボルト頭締めに関するものである。 The present invention uses a square steel pipe as a column material in a steel frame structure building, and in particular, in the case of performing joint joining of the square steel pipe column, a high-strength bolt inserted from the outer surface side of the square steel pipe column is attached to the inner surface wall of the joint area. The present invention relates to high-strength bolt head tightening in which a nut on a nut holding plate provided on a support plate is screwed.

従来から、一般的に鉄骨構造建築物の柱はH形鋼が用いられているが、近年は、柱に角形鋼管を用いた構造が多用されている。高層の建物を構築する場合は、道路の輸送制限により、建設現場で柱の接合が行われるが、H形鋼を用いる場合は断面が開断面のため、添え板と一般的な高力ボルトを用いて容易に接合が可能である。しかし、角形鋼管では閉断面のため、添え板と一般的な高力ボルトを用いて接合することは困難である。そこで、角形鋼管柱の接合方法として、一般的に、図5に示すような方法で施工が行われている。事前に、下側角形鋼管柱14の上端部の外面側にエレクションピ-ス15を設け、上側角形鋼管柱13の下端部の外面側にもエレクションピ-ス15を設けておいて、建方時に、上側柱と下側の角形鋼管柱外面に設けたエレクションピ-ス15の孔に仮ボルト16を通して、上下柱を繋ぎ、柱の出入の調整を行いながら、仮ボルト16を締めて、柱の相互間の仮固定を行い、角形鋼管柱の端部に加工されている開先に、溶接を施し、溶接終了後にエレクションピ-ス15を切断している。
このような従来の現場での溶接接合方法は、現場溶接を行う準備として、工場で柱の開先加工等多くの加工が必要になり、また、現場での溶接作業では、高い溶接技術と厳密な品質管理が不可欠で、作業に長時間を要している。さらに、風、雨、低温等に対する対策、例えば、足場による養生シ-ト張り等が必要であり、工期とコスト的に問題がある。
Conventionally, H-section steel has been generally used for the columns of steel-framed buildings. When constructing a high-rise building, the columns are joined at the construction site due to road transport restrictions. It can be easily joined by using. However, since square steel pipes have a closed cross section, it is difficult to join them using splint plates and general high-strength bolts. Therefore, as a method for joining square steel pipe columns, construction is generally performed by a method as shown in FIG. 5 . In advance, an erection piece 15 is provided on the outer surface side of the upper end of the lower square steel pipe column 14, and an erection piece 15 is also provided on the outer surface side of the lower end of the upper square steel pipe column 13. At the same time, pass the temporary bolt 16 through the hole of the erection piece 15 provided on the outer surface of the upper pillar and the lower square steel pipe pillar, connect the upper and lower pillars, adjust the entrance and exit of the pillar, tighten the temporary bolt 16, are temporarily fixed to each other, welding is applied to the groove processed at the end of the square steel pipe column, and the erection piece 15 is cut after the welding is completed.
Such conventional on-site welding joining methods require a lot of processing such as beveling of columns at the factory in preparation for on-site welding. Quality control is essential, and the work takes a long time. Furthermore, countermeasures against wind, rain, low temperature, etc., such as scaffolding covering sheets, are required, which poses problems in terms of construction period and cost.

次に、上記の溶接接合での問題を解消するために、現在、ボルト工法で行われる場合もある。例えば、図6に示すように、下側角形鋼管柱14と上側角形鋼管柱13のジョイント部に、繋ぎ板17(18)を角形鋼管柱の内側と外側に沿わせて、高力ワンサイドボルト19を用いて、繋ぎ板同士を結合する工法である。
このような高力ワンサイドボルトでの接合方法は、ボルト工法のため、工場での部品製作の削減やUT検査が不要となる利点はあるが、ボルトとして複雑な機構で高価であり、高力ワンサイドボルトを多量に使用することにより、高コストになっている。更に、施工性にも難点がある。例えば、下側角形鋼管柱14の接合領域に、繋ぎ板17(18)の半分が仮固定され、繋ぎ板17(18)の半分は、二列で不安定の状態で上部へ突き出ている。従って、建方時に、下側角形鋼管柱14に、上側の角形鋼管柱13を組み込む場合は、上柱角形鋼管下端の小口(切断面)を、下柱から突き出ている不安定な繋ぎ板17(18)の二列の間(隙間)に、四方同時に挿入する工法のため、施工に長時間を要する。また、角形鋼管柱の外側面の繋ぎ板18は、角形鋼管柱の外側面側に当接されており、外側繋ぎ板18による局部的な出っ張り部のため、柱の耐火材被覆など場合で、仕上げ材が厚くなり、コスト高になっている。
Next, in order to solve the above-mentioned problems with welding joints, bolting is sometimes used at present. For example, as shown in FIG. 6, at the joint of the lower rectangular steel pipe column 14 and the upper rectangular steel pipe column 13, a connecting plate 17 (18) is placed along the inside and outside of the rectangular steel pipe column, and a high-strength one-side bolt 19 is used to join the connecting plates together.
This method of joining with high-strength one-side bolts is a bolting method, so it has the advantage of reducing the number of parts manufactured at the factory and eliminating the need for UT inspection. The cost is high due to the large number of one-side bolts used. Furthermore, there are also difficulties in constructability. For example, half of the connecting plate 17 (18) is temporarily fixed to the joint area of the lower rectangular steel pipe column 14, and half of the connecting plate 17 (18) protrudes upward in two rows in an unstable state. Therefore, when the upper square steel pipe column 13 is incorporated into the lower square steel pipe column 14 at the time of erection, the small end (cut surface) of the lower end of the upper square steel pipe is attached to the unstable connecting plate 17 protruding from the lower column. It takes a long time for construction because it is a method of inserting simultaneously on all four sides between the two rows (gap) of (18). In addition, the joint plate 18 on the outer surface of the square steel pipe column is in contact with the outer surface side of the square steel pipe column, and because of the local protrusion due to the outer joint plate 18, in the case of refractory material coating of the column, etc. The finishing material is thicker and the cost is higher.

次いで、溶接の問題を解消する角形鋼管柱の接合構造として、例えば、特許文献1に開示されている接合構造では、角形鋼管柱の内面側のみに一面摩擦用添板を当接して、角形鋼管柱の外側で、高力ボルトを頭締めして添板とナットによる出っ張り部を少なくした構造が開示されている。
しかし、一般にハイテンボルトのセットはナットを回転させて締め付けることが前提となっており、特許文献1に開示されている例では、所定の張力を得られない可能性がある。例えば、図1(b)に示すように、角形鋼管柱1b内側の上端部に、一面摩擦用添板2を当接して、高力ボルト3を、その角形鋼管柱1bの外側からボルト孔1o、2oを介して、予め設置しているナットホルダー4のナット5へ螺合・締結する方法である。従って、ナット8からの締め付けは不可能である。また、図9(b)、(a)に示すように、ナットホルダー4内部に設けているナット5と座金7の位置調整には難点がある。
Next, as a joint structure for square steel pipe columns that solves the problem of welding, for example, in the joint structure disclosed in Patent Document 1, a one-sided friction splint is abutted only on the inner surface side of the square steel pipe column, and the square steel pipe A structure is disclosed in which high-strength bolts are head-tightened on the outside of the pillar to reduce the protruding portion due to the attachment plate and nut.
However, in general, a set of high-tensile bolts is premised on tightening by rotating a nut, and in the example disclosed in Patent Document 1, there is a possibility that a predetermined tension cannot be obtained. For example, as shown in FIG. 1(b), a one-sided friction splint 2 is brought into contact with the inner upper end of the square steel pipe column 1b, and the high-strength bolt 3 is inserted into the bolt hole 1o from the outside of the square steel pipe column 1b. , 2o to the nut 5 of the nut holder 4 installed in advance. Tightening from the nut 8 is therefore impossible. Further, as shown in FIGS. 9B and 9A, there is a difficulty in adjusting the positions of the nut 5 and the washer 7 provided inside the nut holder 4. FIG.

特開2006-291613号Japanese Patent Application Laid-Open No. 2006-291613

本発明の解決すべき課題は、角形鋼管柱のボルト継手接合構法の場合において、角形鋼管柱の内壁面に、CT形鋼で接合強度を確保した添え板を当接し、一般的な高力ボルトを用いて、上述した従来の接合方法の問題点を解決することにあり、接合強度の安定確保とともに、角形鋼管柱の外面側から挿入した高力ボルトからの回転によるナット締め付けで、一定の微小範囲でボルトの位置変化に対応できるシステムを用いて、施工性を向上させて、接合部におけるコストの削減を目的としている。 The problem to be solved by the present invention is that in the case of a bolted joint construction method for square steel pipe columns, a splint plate whose joining strength is secured by CT steel is abutted against the inner wall surface of the square steel pipe column, and a general high-strength bolt is used to solve the problems of the conventional joining method described above, and in addition to ensuring stable joining strength, by tightening the nut by rotation from the high-strength bolt inserted from the outer surface of the square steel pipe column, a certain minute The purpose is to improve workability and reduce costs at joints by using a system that can respond to bolt position changes within a range.

上記課題を解決するための本発明に係る角形鋼管柱の継手接合構造は、角形鋼管柱を長さ方向に接合する場合で、角形鋼管柱に複数のボルト孔を設け、添え板と高力ボルトを用いて接合する構造において、角形鋼管柱の接合部領域の内面壁に当接して用いる添え板であって、長方形のプレ-トに、CT形鋼で接合強度を確保し、角形鋼管柱のボルト孔に合わせた複数のボルト貫通孔を設けて、ナット保持盤を備えた添え板の下半部を、角形鋼管の上端部内面壁へ当接し、前記角形鋼管の外面側から挿入した高力ボルトと、ナット保持盤に有するナットで添え板を固定した、下側角形鋼管柱であって、前記下側角形鋼管柱の内面壁から上部へ突き出ている添え板の外面側に、上側角形鋼管柱下端部の内面壁が当接して、前記上側角形鋼管柱の外面側から挿入する高力ボルトに、前記添え板に有するナットが螺合して締結することを特徴としている。
続いて、角形鋼管柱の外面側から挿入した高力ボルトの先端部を、角形鋼管柱内面壁に設けている、添え板のナット保持盤に有するナットのねじ穴に挿入する構造にあって、高力ボルトを挿入すると、ナット保持盤に設けた、波板形状ナットカバーの台形波型の上部傾斜面にナットが接触し、ナットが拘束されて、前記高力ボルトの回転を続けることにより、前記ナットは、前記高力ボルトの頭部方向へ、前記高力ボルトのねじ山沿いに移動し添え板に当接して、高力ボルトの頭締めにより、前記添え板が角形鋼管柱の内面壁に密着することを特徴としている。
上記のナット保持盤において、ナット保持盤を形成している長方形のプレート面に、座金直径より大きい円形形状で複数の型抜きを施した座金拘束プレ-トを、前記座金拘束プレ-トと外形寸法が同一のプレ-トに、ナット形状より大きめに切り抜き加工を複数施しているナット拘束プレ-ト片面の所定位置で、レ字状に突起した針金を複数有する面を重合し、前記座金拘束プレ-トと同一寸法で、薄板鋼板を台形形状の波板に加工を施し、前記台形形状の上底側の所定箇所に、ボルト貫通孔を設け、前記ボルト貫通孔の下側傾斜面にナット二面幅より狭いスリット溝を設けたナットカバーを、前記重合盤のナット拘束プレ-ト面に当接し、合成して形成したナット保持盤を特徴としている。
A joint joining structure for square steel pipe columns according to the present invention for solving the above-mentioned problems is a case where square steel pipe columns are joined in the length direction, a plurality of bolt holes are provided in the square steel pipe columns, and splint plates and high-strength bolts are provided. In a structure that uses A high-strength bolt inserted from the outer surface side of the rectangular steel pipe by providing a plurality of bolt through-holes corresponding to the bolt holes and abutting the lower half of the splint plate with the nut retaining disk against the inner wall of the upper end of the rectangular steel pipe. and a lower square steel pipe column in which a splint is fixed with a nut provided on a nut holding plate, wherein the upper square steel pipe column is attached to the outer surface of the splint projecting upward from the inner wall of the lower square steel pipe column The high-strength bolt inserted from the outer surface side of the upper rectangular steel pipe column abuts against the inner wall of the lower end portion, and is fastened by screwing a nut provided on the splint plate.
Next, in the structure in which the tip of the high-strength bolt inserted from the outer surface side of the square steel pipe column is inserted into the threaded hole of the nut on the nut retaining board of the splint plate provided on the inner wall of the square steel pipe column, When the high-strength bolt is inserted, the nut comes into contact with the trapezoidal corrugated upper inclined surface of the corrugated plate-shaped nut cover provided on the nut holding plate, the nut is restrained, and by continuing the rotation of the high-strength bolt, The nut moves in the direction of the head of the high-strength bolt and along the thread of the high-strength bolt and contacts the splint plate. It is characterized by adhering to
In the above nut retaining disk, a washer restraining plate having a circular shape larger than the diameter of the washer and having a plurality of die-cuts on the rectangular plate surface forming the nut retaining disk is attached to the washer restraining plate and the outer shape. A plate with the same dimensions is cut out to a size larger than the shape of the nut. At a predetermined position on one side of the nut restraining plate, the surface having a plurality of wires projecting in the shape of an L is superimposed to restrain the washer. A thin steel plate with the same dimensions as the plate is processed into a trapezoidal corrugated plate, a bolt through hole is provided at a predetermined location on the upper bottom side of the trapezoidal shape, and a nut is provided on the lower inclined surface of the bolt through hole. The nut holding disk is formed by abutting a nut cover provided with a slit groove narrower than the width across flats on the surface of the nut restraining plate of the overlapping disk and synthesizing it.

(A)本発明に係る角形鋼管柱の継手接合構造によれば、一般的にハイテンボルトの締め付けは、ナットを回転させて締め付けることが前提条件になっている。H形鋼柱での接合の場合は、柱断面が開断面のため、添え板と一般的な高力ボルトを用いて容易に接合ができる。しかし、角形鋼管柱の場合は、閉断面のため、鋼管内部から、ナットを回転させることは不可能である。本発明においては、角形鋼管柱の内面壁側に、ナットの回転と位置の微調整ができる、ナット保持盤を設けた添え板を当接し、一般的な高力ボルトを用いて、極めて実用性の高い接合手段を得ることができる。 (A) According to the joint joining structure of square steel pipe columns according to the present invention, tightening of a high-tensile bolt is generally predicated on tightening by rotating a nut. In the case of joining H-beam steel columns, since the cross section of the column is an open cross section, it can be easily joined using a splint plate and general high-strength bolts. However, in the case of a rectangular steel pipe column, it is impossible to rotate the nut from inside the steel pipe because of its closed cross section. In the present invention, a splint plate provided with a nut holding plate, which allows fine adjustment of the rotation and position of the nut, is brought into contact with the inner wall side of the square steel pipe column, and a general high-strength bolt is used. can be obtained.

(B)本発明に係る角形鋼管柱の継手接合構造によれば、上下の角形鋼管柱の接合領域の内面壁に、添え板を通して、柱の外面から高力ボルトを挿入するボルト工法である。建設現場に於いて、角形鋼管柱を接合する際には、下側角形鋼管柱の内部から上部へ突き出ている添え板の外面へ、上側角形鋼管柱の内面壁側を被せる方法のため、建方作業の時間が短縮される。また、添え板に設けたナット保持盤で、ナット位置の微調整を行い、ボルトの締結時間を短縮して、施工コストの節減を可能にしている。 (B) According to the joint joining structure for square steel pipe columns according to the present invention, a bolting method is used in which a high-strength bolt is inserted from the outer surface of the column through a splint plate through the inner wall of the joining region of the upper and lower square steel pipe columns. When joining square steel pipe columns at a construction site, the inner wall side of the upper square steel pipe column is placed over the outer surface of the splint projecting upward from the inside of the lower square steel pipe column. This shortens the work time. In addition, the nut holding plate provided on the attachment plate enables fine adjustment of the nut position, shortening the bolt tightening time and reducing construction costs.

(C)本発明に係る角形鋼管柱の継手接合構造によれば、現在、角形鋼管柱のボルト継手接合の場合、高価な高力ワンサイドボルトを使用して高コストになっている。当工法では、一般的な高力ボルトを使用し、ナットが微小範囲で位置の変化に対応するナット保持盤を用いて、節減を可能にしている。また、柱接合部の外面側の添え板は不要なため、木質ハイブリッドビルには合理的な設計となる。 (C) According to the joint joining structure of square steel pipe columns according to the present invention, at present, in the case of bolt joint joining of square steel pipe columns, expensive high-strength one-side bolts are used, resulting in high costs. In this construction method, a general high-strength bolt is used, and a nut holding plate that can respond to changes in the position of the nut within a minute range is used, making it possible to save money. In addition, since splints on the outer surface of the column joints are not required, the design is rational for a wooden hybrid building.

以下、図1~6に基づいて、本発明を実施するための最良の形態を説明する。図1は本発明に係る角形鋼管柱の継手接合構造で、下側角形鋼管柱へ添え板を挿入する過程と、上側角形鋼管柱との接合する過程の一例を示す立体説明図面である。図2は継手接合構造の一例を示す図面であり、(a)は平断面図、(b)はA-A平断面図である。この例において、角形鋼菅柱1、下側角形鋼管柱1a、上側角形鋼管柱1b、添え板2、長方形プレート2a、CT形鋼2b、ナット保持盤3、ナットカバー3a、ナット拘束プレ-ト3b、座金拘束プレ-ト3c、ボルト貫通孔4、ナット5、ナット孔6、高力ボルト7、座金8、座金孔9、スリット溝10、座金ガイドピン11、及びピンホール12から構成されている。以下、これに沿って説明する。 BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described below with reference to FIGS. FIG. 1 is a three-dimensional explanatory drawing showing an example of a process of inserting a splint into a lower square steel pipe column and a process of joining with an upper square steel pipe column in a joint joining structure for square steel pipe columns according to the present invention. FIG. 2 is a drawing showing an example of the joint joining structure, (a) is a plane cross-sectional view, and (b) is a plane cross-sectional view along AA. In this example, square steel tube column 1, lower square steel tube column 1a, upper square steel tube column 1b, splint plate 2, rectangular plate 2a, CT steel 2b, nut retaining board 3, nut cover 3a, nut restraining plate 3b, washer restraining plate 3c, bolt through hole 4, nut 5, nut hole 6, high strength bolt 7, washer 8, washer hole 9, slit groove 10, washer guide pin 11, and pinhole 12. there is In the following, description will be made along these lines.

まず、下側角形鋼管柱1aと添え板2の結合方法を説明する。図1で示すように、添え板2を下側角形鋼管柱1aの内面壁へ挿入して、下側角形鋼管柱1a外面側から、高力ボルト7をボルト貫通孔4に挿入し、添え板2に設けたナット保持盤3のナット5が高力ボルト7を螺合する仕組みになっている。 First, a method of connecting the lower square steel pipe column 1a and the splint plate 2 will be described. As shown in FIG. 1, a splint 2 is inserted into the inner wall of the lower square steel pipe column 1a, and a high-strength bolt 7 is inserted into the bolt through hole 4 from the outer surface of the lower square steel pipe column 1a. A nut 5 of a nut holding disk 3 provided in 2 is screwed into a high-strength bolt 7. - 特許庁

次に、角形鋼管柱1と添え板2のボルト貫通孔4の位置関係について説明する。図2(a)、(b)で示すように、角形鋼管柱1の四方面でのボルト貫通孔4の位置と、添え板2(プレート2a)のボルト貫通孔4は同位置に設けており、CT形鋼2bのフランジ部と、ナット保持盤3のボルト貫通孔4も同じ配置になっている。 Next, the positional relationship between the square steel pipe column 1 and the bolt through hole 4 of the splint plate 2 will be described. As shown in FIGS. 2(a) and 2(b), the positions of the bolt through holes 4 on the four sides of the square steel pipe column 1 and the bolt through holes 4 of the splint plate 2 (plate 2a) are provided at the same positions. , CT-shaped steel 2b and the bolt through-hole 4 of the nut holding disk 3 are also arranged in the same manner.

続いて、ナット保持盤3の構成について説明する。図3(立体説明図)で示すように、ナット保持盤3は、ナットカバー3a、ナット拘束プレ-ト3b、及び座金拘束プレ-ト3cで構成されている。以下、これに沿って説明する。
まず、座金拘束プレ-ト3cについて説明する。座金拘束プレ-ト3cは、図3(d)に示すように、長方形で所定寸法に加工したプレートに、座金8の直径より大きい円形形状の型抜加工を施した複数の座金孔9を設けて、図4(b)のイ部に示すように、座金8より厚いプレートを用いている。尚、座金孔9の中心軸は、図4(a)のイ部に示すように、座金8の中心軸より下部の位置に設けて、開口部の面積を小さくしている。
次に、ナット拘束プレ-ト3bについて説明する、ナット拘束プレ-ト3bの外形寸法は、座金拘束プレ-ト3cと同一の長方形に加工して、図4(b)のイ部に示すように、座金拘束プレ-ト3cより薄い板厚を用いて、図4(a)のイ部に示すように、ナット5の形状より一回り大きいサイズのナット孔6を複数加工し、図4(a)のロ部に示すように、ナット孔6の中心軸からの鉛直線を対称軸にして、ピンホール12を左右の所定位置に設けて、そのピンホール12に、レ字形状に針金で加工した座金ガイドピン11の水平部を、図4(b)のロ部に示すように、座金拘束プレ-ト3c側の方から差し込み、座金ガイドピン11の斜め形状の先端部は、図4(a)のロ部に示すように、左右2ヶ所のピンホール12から斜め上方向のナット孔6の中心(ボルト軸)へ向けて取り付けている。
次いで、ナットカバー3aについて説明する、ナットカバー3aは、図3(b)に示すように、鋼板(薄板)を台形形状の波板に加工して、図4(a)のハ部に示すように、ボルト軸芯の位置で、波板の上底側に、ボルト貫通孔4とスリット溝10用の切欠き加工を施している。
Next, the configuration of the nut holding board 3 will be described. As shown in FIG. 3 (stereoscopic explanatory view), the nut holding disk 3 is composed of a nut cover 3a, a nut restraining plate 3b, and a washer restraining plate 3c. In the following, description will be made along these lines.
First, the washer constraining plate 3c will be described. As shown in FIG. 3(d), the washer restraining plate 3c is formed by punching a plurality of washer holes 9 having a circular shape larger than the diameter of the washer 8 in a rectangular plate processed to a predetermined size. 4(b), a plate thicker than the washer 8 is used. The central axis of the washer hole 9 is located below the central axis of the washer 8 as shown in part A of FIG. 4A to reduce the area of the opening.
Next, the nut restraining plate 3b will be explained. Then, using a plate thickness thinner than that of the washer constraining plate 3c, as shown in part A of FIG. As shown in part B of a), the vertical line from the center axis of the nut hole 6 is used as the axis of symmetry, and pinholes 12 are provided at predetermined positions on the left and right, and the pinholes 12 are inserted into the pinholes 12 in the shape of a square with a wire. The horizontal part of the machined washer guide pin 11 is inserted from the washer constraining plate 3c side as shown in FIG. As shown in part B of (a), it is attached from two pinholes 12 on the left and right toward the center (bolt shaft) of the nut hole 6 obliquely upward.
Next, the nut cover 3a will be described. As shown in FIG. In addition, notches for bolt through-holes 4 and slit grooves 10 are provided on the upper bottom side of the corrugated plate at the position of the bolt shaft center.

次いで、前述したナット保持盤3の各部品の接合構造について説明する。図3(a)に示すのは、各部品の組立時の立体説明図である。まず、ナット拘束プレ-ト3bの座金拘束プレ-ト3c側に設けたガイドピン11を、座金拘束プレ-ト3cの座金孔9の中へ、入れながら、座金拘束プレ-ト3cとナット拘束プレ-ト3bを重ねて、その合わせ目に溶接を施して重合盤を製作する。続いて、その重合盤のナット拘束プレ-ト3b面に、ナットカバー3aの波板の下底側を合わせて、溶接で固定し、ナット保持盤3を形成している。 Next, the joining structure of each part of the nut holding disk 3 mentioned above will be described. FIG. 3(a) is a three-dimensional explanatory diagram of the assembly of each part. First, the guide pin 11 provided on the washer constraining plate 3c side of the nut constraining plate 3b is inserted into the washer hole 9 of the washer constraining plate 3c, and the washer constraining plate 3c and the nut constraining plate are inserted. The plates 3b are piled up and welded at their seams to produce a superposed plate. Subsequently, the bottom side of the corrugated plate of the nut cover 3a is aligned with the surface of the nut restraining plate 3b of the overlapping disc and fixed by welding to form the nut retaining disc 3. As shown in FIG.

続いて、上述したナット保持盤3の機能過程の一例を図により順次説明する。図4(a)は、ナット保持盤3の各部品プレート(3a、3b、3c)の立面での孔形状図であり、図4(b)は、各部品プレ-トの孔を合成したA-A縦断面図である。
・ は、ナット保持盤3の内部空間に、ナット5と座金8がセットされる前の状態を示している。
・ は、ナット保持盤3内部に、ナット5と座金8がセットされた時点を示しており、ナット5は、ナット孔6の底辺部で、座金8は、左右から傾斜形の座金ガイドピン11で保持されている。従って、ナット5と座金8の中心軸芯線は、所定のボルト軸芯線より低い位置なっている。
・ は、図4(b)のニ部に示すように、角形鋼管柱1の外面側からボルト貫通孔4に、高力ボルト7を挿入すると、挿入された高力ボルト7の面取先(平先)が座金8に接触し、接触された座金8は、ナット5に接触し、座金8から押されたナット5は、ナットカバー3a(上底側)の方へ、スリット溝10の縁に沿って、その傾斜縁を上りながら移動を開始する。また、図4(a)のニ部に示す、2ヶ所の座金ガイドピン11で保持されている座金8は、図4(b)のロ部に示す、ガイドピン11の傾斜部に沿いながら、ナットカバー3a(上底側)の方へ移動を始めて、図4(b)のホ部に示すように、ナット孔6(六角型)の縁に接触し座金孔9内部で保持される。即ち、ナット5は、ボルト貫通孔4の鉛直線上に設けたスリット溝10の溝に沿って上部へ移動し、2ヶ所の座金ガイドピン11で保持されている座金8は、鉛直線上に有する、奥行上部のボルト貫通孔4方向へ移動するシステムである。
・ は、図4(b)のホ部に示すように、ナット5は、高力ボルト7からの押し(回転)が続くと、ナット5はナットカバー3a(上底側)の方へ移動し、所定のボルト軸芯線上において、ナットカバー3aの波板の上部傾斜面に接触し、ナットの動きが止まる。ナット5の動きが止まると、高力ボルト7の先端部(面取先)が、ナット5のねじ穴へ侵入を開始する。尚、ナットカバー3aの波形状は、ナット5上側の波付けと下側の波付けの角度を変えている。
・ は、ナット5と、ナット孔6間には、図4(a)のイ部に示すように、微小な隙間を設けており、高力ボルト7の回転を行うと、ナット5は、六角型のナット孔6内での、動きが制限されるため、高力ボルト7との共回りは生じないが、角形鋼管柱1の外面側において、高力ボルト7頭部が半固定状態で保持されているため、ナット5は、高力ボルト7のねじ山沿いに、ナット孔6の切断面に接触しながら無回転の状態で高力ボルト7の頭部側へ移動を始めて、図4(b)のホ部に示すように、座金孔9内部のナット5側に保持されている座金8は、高力ボルト7頭部の回転による、ナット5からの圧力で、図4(b)のイ部に示すように、座金8が高力ボルト頭部の方向へ移動して、添え板2のCT形鋼2bのフランジ面に当接する。従って、高力ボルト7の回転によるナット5からの締め付けでもって、高力ボルト7の軸部に引張力が発生し、その力で添え板2が角形鋼管柱1の内面壁に密着して、大きな軸力(張力)を得ることになる。また、図4(a)に示すように、ナット孔6は、ナット5より一回り大きい形状に加工を施し、座金孔9に於いても、座金8の直径より大きい円形形状に型抜加工を施して、縦・横等の空間を確保しており、ナット5と座金8は、全方向(上下左右)に、微小範囲の移動が得られる構造になっている。
Next, an example of the functional process of the nut holding disk 3 described above will be sequentially described with reference to the drawings. FIG. 4(a) is an elevation view of the hole shape of each component plate (3a, 3b, 3c) of the nut holding disk 3, and FIG. 4(b) is a composite of the holes of each component plate. It is an AA longitudinal cross-sectional view.
· shows the state before the nut 5 and the washer 8 are set in the inner space of the nut holding plate 3 .
・ indicates the time when the nut 5 and the washer 8 are set inside the nut holding plate 3. The nut 5 is at the bottom of the nut hole 6, and the washer 8 is the washer guide pin 11 inclined from left to right. is held in Therefore, the central axes of the nut 5 and the washer 8 are positioned lower than the predetermined bolt axis.
4(b), when the high-strength bolt 7 is inserted into the bolt through-hole 4 from the outer surface side of the square steel pipe column 1, the chamfered tip of the inserted high-strength bolt 7 ( The flat point) contacts the washer 8, the contacting washer 8 contacts the nut 5, and the nut 5 pushed from the washer 8 moves toward the nut cover 3a (upper bottom side) toward the edge of the slit groove 10. start moving along and up its sloping edge. Also, the washer 8 held by the washer guide pins 11 at two locations shown in part II of FIG. It begins to move toward the nut cover 3a (upper bottom side), contacts the edge of the nut hole 6 (hexagonal shape), and is held inside the washer hole 9, as shown in FIG. 4(b). That is, the nut 5 moves upward along the groove of the slit groove 10 provided on the vertical line of the bolt through hole 4, and the washer 8 held by the two washer guide pins 11 is on the vertical line. It is a system that moves in four directions through the bolt through holes at the top of the depth.
4(b), the nut 5 continues to be pushed (rotated) from the high-strength bolt 7, and the nut 5 moves toward the nut cover 3a (upper bottom side). , the nut comes into contact with the upper slanted surface of the corrugated plate of the nut cover 3a on the predetermined bolt shaft center line, and the movement of the nut stops. When the movement of the nut 5 stops, the tip (chamfered tip) of the high-strength bolt 7 starts to enter the screw hole of the nut 5 . The wavy shape of the nut cover 3a has different angles between the undulations on the upper side of the nut 5 and the undulations on the lower side.
As shown in FIG. 4(a), a small gap is provided between the nut 5 and the nut hole 6, and when the high-strength bolt 7 is rotated, the nut 5 is hexagonal. Since the movement in the nut hole 6 of the mold is restricted, co-rotation with the high-strength bolt 7 does not occur, but on the outer surface side of the square steel pipe column 1, the head of the high-strength bolt 7 is held in a semi-fixed state. 4 ( b), the washer 8 held on the side of the nut 5 inside the washer hole 9 is pushed by the pressure from the nut 5 due to the rotation of the head of the high-strength bolt 7. As shown in part A, the washer 8 moves toward the high-strength bolt head and comes into contact with the flange surface of the CT steel 2b of the attachment plate 2. Therefore, by tightening from the nut 5 due to the rotation of the high-strength bolt 7, a tensile force is generated in the shaft portion of the high-strength bolt 7, and this force causes the splint 2 to adhere to the inner wall of the square steel pipe column 1, A large axial force (tension) is obtained. Further, as shown in FIG. 4(a), the nut hole 6 is machined into a shape one size larger than the nut 5, and the washer hole 9 is also punched into a circular shape larger in diameter than the washer 8. The nut 5 and the washer 8 are structured so that they can be moved in all directions (up, down, left, and right) within a very small range.

以下に実施例として、下側角形鋼管柱1aと上側角形鋼管柱1bの接合方法を図1~
図2に基づき施工手順を説明する。
まず、工場において、添え板2とナット保持盤3の組み合わせについて説明する。添え板2の長方形プレ-ト2aと、CT形鋼2bのフランジ部、及びナット保持盤3に、角形鋼管柱1のボルト貫通孔4と同じピッチで、ボルト貫通孔4の加工を施して、図2に示すように、長方形プレート2aにCT形鋼2bのフランジ外面側を合わせて、溶接で固定して添え板2を製作する。次に、そのCT形鋼2bのフランジの内面側に、ナット5と座金8をセットしたナット保持盤3を組込み、溶接で固定している。
次いで、施工現場において、まず、地盤上で、図1に示すように、下側角形鋼管柱1aの上端内面壁に、添え板2の下半部を挿入し、前記角形鋼管柱1aの外面側から挿入した高力ボルト7と、ナット保持盤3のナット5で添え板を固定した下側角形鋼管柱1aを、所定位置に立設する。次に、図1に示すように、下側角形鋼管柱1aの内部から上部へ突き出ている添え板2の外側面と、上側角形鋼管柱1bの下端部の内面壁を摺り合わせて、下側へスライドしながら、上側角形鋼管柱1bの建て入れを行う。次いで、上側角形鋼管柱1bの外面側から挿入した高力ボルト7に、添え板2に設けたナット保持盤3のナット5が螺合し、下側角形鋼管柱1aと上側角形鋼管柱1bが接合されて、本発明の角形鋼管柱の継手接合構造となっている。
As an example, the joining method of the lower square steel pipe column 1a and the upper square steel pipe column 1b will be shown in FIGS.
The construction procedure will be explained based on FIG.
First, the combination of the attachment plate 2 and the nut holding plate 3 at the factory will be described. The rectangular plate 2a of the attachment plate 2, the flange portion of the CT-shaped steel 2b, and the nut holding plate 3 are processed with bolt through holes 4 at the same pitch as the bolt through holes 4 of the square steel pipe column 1, As shown in FIG. 2, the flange outer surface side of the CT-shaped steel 2b is matched with the rectangular plate 2a and fixed by welding to manufacture the splint plate 2. As shown in FIG. Next, a nut holding plate 3 with a nut 5 and a washer 8 set therein is incorporated into the inner surface of the flange of the CT steel 2b and fixed by welding.
Next, at the construction site, first, on the ground, as shown in FIG. A high-strength bolt 7 inserted from the bottom and a lower square steel pipe column 1a fixed with a splint plate by a nut 5 of a nut holding plate 3 are erected at a predetermined position. Next, as shown in FIG. 1, the outer surface of the splint 2 protruding upward from the inside of the lower square steel pipe column 1a and the inner surface wall of the lower end of the upper square steel pipe column 1b are rubbed together, and the lower side is The upper square steel pipe column 1b is erected while sliding to. Next, a high-strength bolt 7 inserted from the outer surface side of the upper square steel pipe column 1b is screwed with a nut 5 of a nut holding plate 3 provided on the attachment plate 2, and the lower square steel pipe column 1a and the upper square steel pipe column 1b are engaged. They are joined to form the joint joining structure of the square steel pipe column of the present invention.

以上説明したように本発明に係る角形鋼管柱の継手接合構造において、柱の外面側から挿入した高力ボルトを、柱内部のナットが螺合する方法である。従って、ボルト締結の時間が短縮されて、接合の施工性が高まり、施工コストの節減ができる。さらに、一般的な高力ボルトを用いており、高価な高力ワンサイドボルトを用いることなく、節減を可能にしている。また、現在、開発途上にある、木質ハイブリッド耐火ビルの躯体に、角形鋼管を用いることにより、合理的な設計が可能になる。従って、建設業界での社会に与える効用は極めて大きい。 As described above, in the joint joining structure for square steel pipe columns according to the present invention, a high-strength bolt inserted from the outer surface side of the column is screwed into a nut inside the column. Therefore, the bolt fastening time is shortened, the joint workability is improved, and the construction cost can be reduced. In addition, it uses common high-strength bolts, making it possible to save money without using expensive high-strength one-sided bolts. In addition, rational design becomes possible by using rectangular steel pipes for the frame of the wooden hybrid fireproof building, which is currently under development. Therefore, the social utility of the construction industry is extremely large.

本発明に係る角形鋼管柱の継手接合構造で、下側角形鋼管柱へ添え板を挿入する過程と、上側角形鋼管柱との接合する過程の一例を示す立体説明図である。FIG. 4 is a three-dimensional explanatory view showing an example of a process of inserting a splint into the lower square steel pipe column and a process of joining the upper square steel pipe column in the joint joining structure for square steel pipe columns according to the present invention. 本発明に係る角形鋼管柱の継手接合構造の一例を示す図面であり、(a)は平断面図、(b)はA-A縦断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is drawing which shows an example of the joint joining structure of the square steel pipe column which concerns on this invention, (a) is a plane sectional view, (b) is an AA longitudinal cross-sectional view. 本発明に係るナット保持金具の立体説明図であり、(a)はナット保持盤の立体図、(b)はナットカバー、(c)はナット拘束プレ-ト、(b)は座金拘束プレ-トの立体図である。1 is a three-dimensional explanatory view of a nut holding metal fitting according to the present invention, (a) is a three-dimensional view of a nut holding plate, (b) is a nut cover, (c) is a nut restraining plate, and (b) is a washer restraining plate. is a three-dimensional view of the 本発明に係るナット保持盤の機能過程の一例を示す説明図であり、(a)は各部品プレートの立面孔形状図、(b)は各孔を合成したA-A縦断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows an example of the functional process of the nut holding disk which concerns on this invention, (a) is an elevation hole shape figure of each component plate, (b) is an AA longitudinal cross-sectional view which combined each hole. 従来からの角形鋼管柱の継手接合工法の例を示す立体説明図である。It is a solid explanatory drawing which shows the example of the joint joining method of the conventional square steel pipe column. 現在、角形鋼管柱の継手接合として用いられている一例を示す立体説明図である。It is a three-dimensional explanatory drawing showing an example currently used as joint joining of a square steel pipe column.

1 角形鋼管柱 1a下側角形鋼管柱、1b上側角形鋼管柱
2 添え板
2a 長方形プレート
2b CT形鋼
3 ナット保持盤
3a ナットカバー
3b ナット拘束プレ-ト
3c 座金拘束プレ-ト
4 ボルト貫通孔、
5 ナット
6 ナット孔
7 高力ボルト
8 座金
9 座金孔
10 スリット溝
11 座金ガイドピン
12 ピンホール
13 上側角形鋼管柱
14 下側角形鋼管柱
15 エレクションピ-ス
16 仮ボルト
17 繋ぎ板(内側)
18 繋ぎ板(外側)
19 ワンサイドボルト
























1 square steel pipe column 1a lower square steel pipe column, 1b upper square steel pipe column
2 Attachment plate 2a Rectangular plate 2b CT steel 3 Nut holding plate 3a Nut cover 3b Nut restraint plate 3c Washer restraint plate 4 Bolt through hole,
5 Nut 6 Nut hole 7 High strength bolt
8 washer
9 washer hole 10 slit groove
11 washer guide pin
12 Pinhole 13 Upper square steel pipe column 14 Lower square steel pipe column 15 Erection piece 16 Temporary bolt 17 Connecting plate (inside)
18 Tie plate (outside)
19 One side bolt
























Claims (3)

角形鋼管柱を長さ方向に接合する場合で、角形鋼管柱に複数のボルト孔を設け、添え板と高力ボルトを用いて接合する構造において、角形鋼管柱の接合部領域の内面壁に当接して用いる添え板にあって、長方形のプレ-トに、CT形鋼で接合強度を確保し、角形鋼管柱のボルト孔に合わせた複数のボルト貫通孔を設けて、ナット保持盤を備えた添え板の下半部を、角形鋼管の上端内面壁へ当接し、前記角形鋼管の外面側から挿入した高力ボルトと、ナット保持盤に有するナットで添え板を固定した、下側角形鋼管柱であって、前記下側角形鋼管柱の内面壁から上部へ突き出ている添え板の外面側に、上側角形鋼管柱下端部の内面壁が当接し、前記上側角形鋼管柱の外面側から挿入する高力ボルトに、前記添え板に有するナットが螺合して締結することを特徴とする角形鋼管柱の継手接合構造。 When joining square steel pipe columns in the longitudinal direction, in a structure where multiple bolt holes are provided in the square steel pipe columns and joined using splint plates and high-strength bolts, the inner wall of the joint area of the square steel pipe columns The splint plate used in contact is a rectangular plate that secures joint strength with CT-shaped steel, has multiple bolt through holes that match the bolt holes of the square steel pipe column, and is equipped with a nut holding board. A lower square steel pipe column in which the lower half of the splint plate is in contact with the inner wall of the upper end of the square steel pipe, and the splint plate is fixed with a high-strength bolt inserted from the outer surface side of the square steel pipe and a nut provided on the nut holding plate. The inner wall of the lower end of the upper square steel pipe column abuts against the outer surface of the splint projecting upward from the inner wall of the lower square steel pipe column, and is inserted from the outer surface of the upper square steel pipe column. A joint connection structure for a square steel pipe column, characterized in that a high-strength bolt is fastened by screwing a nut provided on the splint plate. 角形鋼管柱の外面側から挿入した高力ボルトの先端部を、角形鋼管柱内面壁に設けている、添え板のナット保持盤に有するナットのねじ穴に挿入する構造にあって、高力ボルトを挿入すると、ナット保持盤に設けた、波板形状ナットカバーの台形波型の上部傾斜面にナットが接触し、ナットが拘束されて、高力ボルトの回転を続けることにより、前記ナットは、前記高力ボルトの頭部方向へ、高力ボルトのねじ山沿いに移動し添え板に当接して、高力ボルトの頭締めにより、前記添え板が、角形鋼管柱の内面壁に密着することを特徴とする請求項1記載の角形鋼管柱の継手接合構造。 The high-strength bolt has a structure in which the tip of the high-strength bolt inserted from the outer surface of the square steel pipe column is inserted into the screw hole of the nut on the nut holding plate of the splint plate provided on the inner wall of the square steel pipe column. When the is inserted, the nut comes into contact with the trapezoidal corrugated upper inclined surface of the corrugated plate nut cover provided on the nut holding plate, the nut is restrained, and by continuing the rotation of the high-strength bolt, the nut is It moves along the thread of the high-strength bolt toward the head of the high-strength bolt and comes into contact with the splint plate, and the splint plate comes into close contact with the inner wall of the square steel pipe column by tightening the head of the high-strength bolt. The joint joining structure of the square steel pipe column according to claim 1. 前記ナット保持盤において、ナット保持盤を形成している長方形のプレ-ト面に、座金直径より大きい円形形状の複数の型抜きを施した座金拘束プレ-トを、前記座金拘束プレ-トと外形寸法が同一のプレ-トに、ナット形状より大きめに切り抜き加工を複数しているナット拘束プレ-ト片面の所定位置で、レ字状に突起した針金を複数有する面に重合し、前記座金拘束プレ-トと同一寸法で、薄板鋼板を台形状の波板に加工を施し、前記台形形状の上底側の所定箇所に、ボルト貫通孔を設けて、前記ボルト貫通孔の下側傾斜面にナット二面幅より狭いスリット溝を設けたナットカバーを、前記重合盤のナット拘束プレ-ト面に当接し、合成して形成したナット保持盤を特徴とする請求項1又は2記載の角形鋼管柱の継手接合構造。













In the nut retaining disc, a washer constraining plate obtained by punching a plurality of circular shapes larger than the diameter of the washer on the rectangular plate surface forming the nut retaining disc is referred to as the washer constraining plate. A plate with the same external dimensions is cut out to be larger than the shape of the nut. At a predetermined position on one side of the nut restraining plate, a plurality of wires protruding in the shape of a square overlap with the surface having a plurality of wires, and the washer A thin steel plate is processed into a trapezoidal corrugated plate with the same dimensions as the restraining plate, and a bolt through hole is provided at a predetermined location on the upper base side of the trapezoidal shape, and the lower inclined surface of the bolt through hole 3. The rectangular shape according to claim 1 or 2, wherein a nut cover having a slit groove narrower than the width across flats of the nut is abutted against the surface of the nut restraining plate of the superimposed plate and synthesized. Joint connection structure of steel pipe columns.













JP2021172870A 2021-10-22 2021-10-22 Coupling joint structure of square steel pipe column Pending JP2023062776A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114411981A (en) * 2022-03-15 2022-04-29 西南石油大学 Box assembled square steel pipe frame construction's bolted connection node
CN117569185A (en) * 2024-01-16 2024-02-20 贵州省公路工程集团有限公司 Steel truss web member-concrete combined arch bridge main arch ring segment steel structure stamping connecting plate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114411981A (en) * 2022-03-15 2022-04-29 西南石油大学 Box assembled square steel pipe frame construction's bolted connection node
CN114411981B (en) * 2022-03-15 2023-08-25 西南石油大学 Bolt connection node of box assembly type square steel pipe frame structure
CN117569185A (en) * 2024-01-16 2024-02-20 贵州省公路工程集团有限公司 Steel truss web member-concrete combined arch bridge main arch ring segment steel structure stamping connecting plate
CN117569185B (en) * 2024-01-16 2024-03-22 贵州省公路工程集团有限公司 Steel truss web member-concrete combined arch bridge main arch ring segment steel structure stamping connecting plate

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