JP6913798B1 - Steel material connection mechanism and steel material connection method - Google Patents

Steel material connection mechanism and steel material connection method Download PDF

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JP6913798B1
JP6913798B1 JP2020086588A JP2020086588A JP6913798B1 JP 6913798 B1 JP6913798 B1 JP 6913798B1 JP 2020086588 A JP2020086588 A JP 2020086588A JP 2020086588 A JP2020086588 A JP 2020086588A JP 6913798 B1 JP6913798 B1 JP 6913798B1
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shaped metal
metal fitting
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JP2021181793A (en
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賢司 向後
賢司 向後
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松山鋼材株式会社
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Abstract

【課題】内側に手が入り難い長尺の鋼材に、L字形金具を外側からのナット締め作業で簡単にかつ堅固に締結することができるとともに、従来より径の太いボルトを使用することのできる鋼材連結機構等を提供する。【解決手段】角形鋼管と他の鉄骨材とをL字形金具を用いて直交するかたちで連結する鋼材連結機構において、角形鋼管に設けられ、ボルトの頭部が挿通可能な大きさとされたボルト頭部挿入部と、当該ボルト頭部挿入部から、延在する長穴状のボルト係止部であって、幅が、ボルトの外径より小さく、かつ、ボルトの首部の軸径より大きいボルト係止部と、を有するボルト締結孔を具備し、ボルト頭部挿入部からボルトの頭部を角形鋼管内に挿入し、ボルト係止部内をスライドさせてL字形金具との締結位置にボルトを係止し、この状態でL字形金具のボルト孔にボルトを挿通させてナットで締結可能とされている。【選択図】図1PROBLEM TO BE SOLVED: To easily and firmly fasten an L-shaped metal fitting to a long steel material which is difficult to reach inside by nut tightening work from the outside, and to use a bolt having a larger diameter than before. Provide a steel material connecting mechanism and the like. SOLUTION: In a steel material connecting mechanism for connecting a square steel pipe and another steel frame material in an orthogonal manner by using an L-shaped metal fitting, a bolt head provided on the square steel pipe and having a size such that a bolt head can be inserted. A bolt engagement part that is an elongated hole-shaped bolt locking part that extends from the part insertion part and the bolt head insertion part, and whose width is smaller than the outer diameter of the bolt and larger than the shaft diameter of the neck part of the bolt. A bolt fastening hole having a stop portion is provided, and the bolt head is inserted into a square steel pipe from the bolt head insertion portion, and the bolt is slid inside the bolt locking portion to engage the bolt at the fastening position with the L-shaped metal fitting. In this state, the bolt can be inserted into the bolt hole of the L-shaped metal fitting and fastened with a nut. [Selection diagram] Fig. 1

Description

本発明は、鋼材連結機構及び鋼材連結方法に係り、特に角形鋼管と他の鉄骨材とをL字形金具を用いて直交するかたちでボルト及びナットにより連結する鋼材連結機構及び鋼材連結方法に関する。 The present invention relates to a steel material connecting mechanism and a steel material connecting method, and particularly relates to a steel material connecting mechanism and a steel material connecting method in which a square steel pipe and another steel frame material are connected by bolts and nuts in an orthogonal manner using an L-shaped metal fitting.

従来から、溶接などの技術を用いずに、ねじを利用して角型鋼管にL型金具などを固定する技術としては、コの字状とされ、平行する両側端部に雄ねじが形成された締結部材を用いる連結機構が知られている(例えば特許文献1参照)。 Conventionally, as a technique for fixing an L-shaped metal fitting or the like to a square steel pipe using a screw without using a technique such as welding, it has a U-shape, and male threads are formed on both parallel end portions. A connecting mechanism using a fastening member is known (see, for example, Patent Document 1).

特許文献1の連結機構では、角形鋼管に2つの孔さえ設けておけば、鋼管の外面から全ての作業を行えるため、鋼管内で作業者の手が届かないような長尺の鋼管の中程の部分についてもL型金具を取り付け固定した上で他の鋼材を連結する作業を行える。 In the connecting mechanism of Patent Document 1, if only two holes are provided in the square steel pipe, all the work can be performed from the outer surface of the steel pipe. The work of connecting other steel materials can be performed after attaching and fixing the L-shaped metal fittings to the part of.

特許第5027847号公報Japanese Patent No. 5027847

しかしながら、上述した従来の連結機構では、コの字状の締結部材を角型鋼管内で回転させる必要があり、例えば高さが半分程度の角形鋼管などでは、内側に回転スペースがなく、コの字状の締結部材が使えない。 However, in the conventional connecting mechanism described above, it is necessary to rotate the U-shaped fastening member in the square steel pipe. For example, in a square steel pipe having a height of about half, there is no rotation space inside and the U-shape is formed. The shape of the fastening member cannot be used.

また、コの字状の締結部材は、棒状のねじの軸に2度屈曲加工を施すことから、軸径が比較的細い(例えばM12程度)ものしか作れず、さらに高い強度を必要とする場合等において太い径のものを使用することができない。 Further, since the U-shaped fastening member is bent twice on the shaft of the rod-shaped screw, only a relatively small shaft diameter (for example, about M12) can be made, and higher strength is required. It is not possible to use a large diameter one.

本発明はこのような課題を解決するためになされたもので、内側に手が入り難い長尺の鋼材に、L字形金具を外側からのナット締め作業で簡単にかつ堅固に締結することができるとともに、M16等の従来より径の太いボルトを使用することのできる鋼材連結機構及び鋼材連結方法を提供することにある。 The present invention has been made to solve such a problem, and an L-shaped metal fitting can be easily and firmly fastened to a long steel material that is difficult to reach inside by tightening nuts from the outside. At the same time, it is an object of the present invention to provide a steel material connecting mechanism and a steel material connecting method capable of using a bolt having a larger diameter than the conventional one such as M16.

本発明の鋼材連結機構は、角形鋼管と他の鉄骨材とをL字形金具を用いて直交するかたちでボルト及びナットにより連結する鋼材連結機構において、前記角形鋼管に設けられ、前記ボルトの頭部が挿通可能な大きさとされたボルト頭部挿入部と、当該ボルト頭部挿入部から、延在する長穴状のボルト係止部であって、幅が、前記ボルトの外径より小さく、かつ、前記ボルトの首部の軸径より大きいボルト係止部と、を有するボルト締結孔を具備し、前記ボルト頭部挿入部から前記ボルトの頭部を前記角形鋼管内に挿入し、前記ボルト係止部内をスライドさせて前記L字形金具との締結位置に前記ボルトを係止し、この状態で前記L字形金具のボルト孔に前記ボルトを挿通させて前記ナットで締結可能とされたことを特徴とする。 The steel material connecting mechanism of the present invention is a steel material connecting mechanism for connecting a square steel pipe and another steel frame material with bolts and nuts in an orthogonal manner using an L-shaped metal fitting, and is provided on the square steel pipe and has a head of the bolt. A bolt head insertion portion having a size that allows the bolt to be inserted, and a long hole-shaped bolt locking portion that extends from the bolt head insertion portion, and the width is smaller than the outer diameter of the bolt and A bolt fastening hole having a bolt locking portion larger than the shaft diameter of the neck portion of the bolt is provided, and the head of the bolt is inserted into the square steel pipe from the bolt head insertion portion to lock the bolt. The bolt is locked at the fastening position with the L-shaped metal fitting by sliding the inside of the portion, and in this state, the bolt is inserted into the bolt hole of the L-shaped metal fitting and can be fastened with the nut. do.

本発明の鋼材連結方法は、角形鋼管と他の鉄骨材とをL字形金具を用いて直交するかたちでボルト及びナットにより連結する鋼材連結方法において、前記角形鋼管に、前記ボルトの頭部が挿通可能な大きさとされたボルト頭部挿入部と、当該ボルト頭部挿入部から、延在する長穴状のボルト係止部であって、幅が、前記ボルトの外径より小さく、かつ、前記ボルトの首部の軸径より大きいボルト係止部と、を有するボルト締結孔を配設し、前記ボルト頭部挿入部から前記ボルトの頭部を前記角形鋼管内に挿入し、前記ボルト係止部内をスライドさせて前記L字形金具との締結位置に前記ボルトを係止し、この状態で前記L字形金具のボルト孔に前記ボルトを挿通させて前記ナットで締結することを特徴とする。 The steel material connecting method of the present invention is a steel material connecting method in which a square steel pipe and another steel frame material are connected by bolts and nuts in an orthogonal manner using an L-shaped metal fitting, and the head of the bolt is inserted into the square steel pipe. A bolt head insertion portion having a possible size and an elongated hole-shaped bolt locking portion extending from the bolt head insertion portion, the width of which is smaller than the outer diameter of the bolt, and the said. A bolt fastening hole having a bolt locking portion larger than the shaft diameter of the neck portion of the bolt is arranged, the head of the bolt is inserted into the square steel pipe from the bolt head insertion portion, and the inside of the bolt locking portion is inserted. Is slid to lock the bolt at the fastening position with the L-shaped metal fitting, and in this state, the bolt is inserted into the bolt hole of the L-shaped metal fitting and fastened with the nut.

本発明の鋼材連結機構及び鋼材連結方法によれば、内側に手が入り難い長尺の鋼材に、L字形金具を外側からのナット締め作業で簡単にかつ堅固に締結することができるとともに、M16等の従来より径の太いボルトを使用することができる。 According to the steel material connecting mechanism and the steel material connecting method of the present invention, the L-shaped metal fitting can be easily and firmly fastened to a long steel material that is difficult to reach inside by nut tightening work from the outside, and M16. It is possible to use a bolt having a larger diameter than before.

実施形態に係る鋼材連結機構及び鋼材連結方法の構成を示す図。The figure which shows the structure of the steel material connecting mechanism and the steel material connecting method which concerns on embodiment. 図1のボルト締結孔の構成を示す図。The figure which shows the structure of the bolt fastening hole of FIG. ボルト締結孔へのボルトの配置方法を説明するための図。The figure for demonstrating the arrangement method of a bolt in a bolt fastening hole. ボルト締結孔へのボルトの配置方法を説明するための図。The figure for demonstrating the arrangement method of a bolt in a bolt fastening hole. ボルト締結孔へのボルトの配置方法を説明するための図。The figure for demonstrating the arrangement method of a bolt in a bolt fastening hole. 図1の角形鋼管とL字形金具とを締結した状態を示す図。The figure which shows the state which fastened the square steel pipe of FIG. 1 and an L-shaped metal fitting. ボルトの外径と首部の径を説明するための図。The figure for demonstrating the outer diameter of a bolt and the diameter of a neck.

以下、図面を参照して、実施形態に係る鋼材連結機構及び鋼材連結方法について詳細に説明する。 Hereinafter, the steel material connecting mechanism and the steel material connecting method according to the embodiment will be described in detail with reference to the drawings.

図1は、本発明の実施形態に係る鋼材連結機構及び鋼材連結方法の構成を示す斜視図である。図1に示すように、本実施形態では、角形鋼管2と他の鋼材(図示せず)を、L字形金具7を介して連結(結合)するケースを例示し、以下このケースについて詳細に説明する。例えば、鉄骨建築物の壁面を構成する上下の梁を構成する角形鋼管2と、これらの梁間に直交する方向に介在される胴縁とを、L字形金具7を介して連結する連結機構等である。 FIG. 1 is a perspective view showing a configuration of a steel material connecting mechanism and a steel material connecting method according to an embodiment of the present invention. As shown in FIG. 1, in the present embodiment, a case in which a square steel pipe 2 and another steel material (not shown) are connected (combined) via an L-shaped metal fitting 7 is illustrated, and this case will be described in detail below. do. For example, a connecting mechanism that connects the square steel pipes 2 that form the upper and lower beams that make up the wall surface of a steel-framed building and the furring strips that are interposed between these beams in a direction orthogonal to each other via an L-shaped metal fitting 7. be.

図1に示すように、角形鋼管2は、面2a、面2b、面2c、面2dの4つの面を有する四角筒状に形成され、長手方向に延びる長尺の鋼管であり、1枚の金属板材を折り曲げて構成され、繋ぎ目は図示しない溶接部にて溶接されている。本実施形態では、この角形鋼管2の1つの面2aに、L字形金具7を取り付けるための締め付け用のボルト8(図3等参照。)を挿通するためのボルト締結孔10が設けられている。 As shown in FIG. 1, the square steel pipe 2 is a long steel pipe formed in a square cylinder shape having four surfaces, a surface 2a, a surface 2b, a surface 2c, and a surface 2d, and extends in the longitudinal direction. It is constructed by bending a metal plate material, and the joint is welded at a welded portion (not shown). In the present embodiment, a bolt fastening hole 10 for inserting a tightening bolt 8 (see FIG. 3 and the like) for attaching the L-shaped metal fitting 7 is provided on one surface 2a of the square steel pipe 2. ..

このボルト締結孔10は、図2、図3に示すように、角形鋼管2の幅方向の中央部分に設けられ、ボルト8の頭部8aが挿通可能な寸法にて略円形状に形成された透孔からなるボルト頭部挿入部10aと、このボルト頭部挿入部10aから角形鋼管2の幅方向の両端に向けて延在する長穴状のボルト係止部10bとを具備している。 As shown in FIGS. 2 and 3, the bolt fastening hole 10 is provided in the central portion of the square steel pipe 2 in the width direction, and is formed in a substantially circular shape with dimensions that allow the head 8a of the bolt 8 to be inserted. It includes a bolt head insertion portion 10a formed of a through hole, and an elongated hole-shaped bolt locking portion 10b extending from the bolt head insertion portion 10a toward both ends of the square steel pipe 2 in the width direction.

図2に示すように、ボルト締結孔10のボルト頭部挿入部10aの径(図2に示す長さA)は、例えばM16のボルト8の頭部8a(例えばM16の場合直径約27.7mm)を挿通させることができる大きさ(例えば31mm)とされている。また、ボルト係止部10bの幅(図2に示す長さB(角形鋼管2の長さ方向の幅))は、ボルト8の外径(図7に示すC)(例えばM16の場合16mm)よりも小さく、かつ、ボルト8の頭部8aとねじ部8bとの境界部である首部8c(図7参照)の径(図7に示すD)(例えばM16の場合14.6mm)より大きな寸法とされている。ボルト係止部10bの幅Bは、具体的には例えば、15.5mm等である。 As shown in FIG. 2, the diameter of the bolt head insertion portion 10a of the bolt fastening hole 10 (length A shown in FIG. 2) is, for example, the head 8a of the bolt 8 of M16 (for example, in the case of M16, the diameter is about 27.7 mm). ) Can be inserted (for example, 31 mm). Further, the width of the bolt locking portion 10b (length B shown in FIG. 2 (width in the length direction of the square steel pipe 2)) is the outer diameter of the bolt 8 (C shown in FIG. 7) (for example, 16 mm in the case of M16). Smaller and larger than the diameter (D shown in FIG. 7) (for example, 14.6 mm in the case of M16) of the neck portion 8c (see FIG. 7) which is the boundary between the head portion 8a and the screw portion 8b of the bolt 8. It is said that. Specifically, the width B of the bolt locking portion 10b is, for example, 15.5 mm or the like.

なお、ボルト8としては、上記した通り、ボルト8の首部8cの径(頭部8aとねじ部8bとの境界部の軸径)が、ボルト8の外径より小さくなっているものを使用することができる。また、ボルト8として、ワッシャ―付きのものを使用する場合は、ボルト頭部挿入部10aは、頭部8aとともに、ワッシャ―を挿通させることのできる大きさとする必要がある。 As the bolt 8, as described above, the diameter of the neck portion 8c of the bolt 8 (the shaft diameter of the boundary portion between the head portion 8a and the screw portion 8b) is smaller than the outer diameter of the bolt 8. be able to. When using a bolt 8 with a washer, the bolt head insertion portion 10a needs to have a size that allows the washer to be inserted together with the head 8a.

このような寸法のボルト係止部10bを設けることにより、ボルト係止部10b内に、ボルト8のねじ部8bを係止してボルト8を支持することができ、かつ、ボルト8をボルト係止部10b内で、角形鋼管2の幅方向にスライドさせることできるようになっている。なお、このような寸法のボルト締結孔10、特にボルト係止部10bの部分は、高い寸法精度で製作する必要がある。このため、高い寸法精度で加工を行うことのできるレーザ加工装置等を用いて製作することが好ましい。 By providing the bolt locking portion 10b having such dimensions, the screw portion 8b of the bolt 8 can be locked in the bolt locking portion 10b to support the bolt 8, and the bolt 8 can be bolted. Within the stop portion 10b, the square steel pipe 2 can be slid in the width direction. The bolt fastening hole 10 having such dimensions, particularly the portion of the bolt locking portion 10b, needs to be manufactured with high dimensional accuracy. Therefore, it is preferable to use a laser processing apparatus or the like capable of processing with high dimensional accuracy.

なお、ボルト締結孔10の形状は、図2に示される形状のものに限られず、ボルト頭部挿入部10aとここから延在するボルト係止部10bとを有するものであれば、どのような形状のものであってもよい。例えば、1本のボルト8で締結する鋼材連結機構であれば、ボルト頭部挿入部10aから一方へ延在するボルト係止部10bを有する形状のボルト締結孔10としてもよい。また、締結する複数のボルト8毎に夫々別々に、ボルト頭部挿入部10aとここから延在するボルト係止部10bとを有するボルト締結孔10を設けてもよい。 The shape of the bolt fastening hole 10 is not limited to the shape shown in FIG. 2, and any shape may have a bolt head insertion portion 10a and a bolt locking portion 10b extending from the bolt head insertion portion 10a. It may have a shape. For example, in the case of a steel material connecting mechanism for fastening with one bolt 8, a bolt fastening hole 10 having a bolt locking portion 10b extending from the bolt head insertion portion 10a to one side may be used. Further, a bolt fastening hole 10 having a bolt head insertion portion 10a and a bolt locking portion 10b extending from the bolt head insertion portion 10a may be provided separately for each of the plurality of bolts 8 to be fastened.

一方、図1に示すように、L字形金具7は、互いに直交する平板部5、6を有し、側面から見た時の形状がL字形のL形鋼等から構成されている。角形鋼管2の面2aに当接されるL字形金具7の平板部6には、L字形金具7を角形鋼管2にボルト8でねじ止めするための円孔からなるボルト挿通孔11が所定の間隔を空けて2つ設けられている。これらのボルト挿通孔11の径は、当然ボルト8の外径(M16の場合16mm)よりも大きく設定されており、ボルト8を挿通可能とされている。また、L字形金具7の平板部5には、他の鋼材(図示せず)をボルト止めするためのボルトを挿通するための円孔からなるボルト挿通孔12が、1又は複数(図1に示す例では1つ)設けられている。 On the other hand, as shown in FIG. 1, the L-shaped metal fitting 7 has flat plate portions 5 and 6 orthogonal to each other, and is made of L-shaped steel or the like whose shape when viewed from the side surface is L-shaped. The flat plate portion 6 of the L-shaped metal fitting 7 that comes into contact with the surface 2a of the square steel pipe 2 is provided with a bolt insertion hole 11 formed of a circular hole for screwing the L-shaped metal fitting 7 to the square steel pipe 2 with a bolt 8. Two are provided at intervals. The diameter of these bolt insertion holes 11 is naturally set to be larger than the outer diameter of the bolt 8 (16 mm in the case of M16), so that the bolt 8 can be inserted. Further, in the flat plate portion 5 of the L-shaped metal fitting 7, one or a plurality of bolt insertion holes 12 formed of circular holes for inserting bolts for bolting other steel materials (not shown) are provided (in FIG. 1). In the example shown, one) is provided.

上記構成の実施形態に係る鋼材連結機構及び鋼材連結方法では、ボルト締結孔10を使用して、ボルト8を、その頭部8aが角形鋼管2内に位置し、ねじ部8bが角形鋼管2の外部に突出するようにボルト8を係止した状態とし、このボルト8にL字形金具7のボルト挿通孔11を挿通し、ナット9(図6参照。)を締め付けることによって、角形鋼管2にL字形金具7を固定する。 In the steel material connecting mechanism and the steel material connecting method according to the embodiment of the above configuration, the bolt 8 is provided by using the bolt fastening hole 10, the head portion 8a thereof is located in the square steel pipe 2, and the screw portion 8b is the square steel pipe 2. The bolt 8 is locked so as to protrude to the outside, the bolt insertion hole 11 of the L-shaped metal fitting 7 is inserted into the bolt 8, and the nut 9 (see FIG. 6) is tightened to L the square steel pipe 2. Fix the character metal fitting 7.

具体的には、ボルト8の先端側(ねじ部8b側)を手等で把持した状態で図3に示すように、ボルト8の頭部8aをボルト頭部挿入部10aから角形鋼管2の内部に挿入し、この後、図3に示す矢印のように、ボルト8をボルト係止部10bに沿って一方(図3に示す例では図3中左側方向)へ移動させる。そして、図4に示すように、ボルト8がボルト係止部10bに係止された状態で、L形金具7のボルト挿通孔11とねじ止めされる位置へセットする。 Specifically, as shown in FIG. 3 with the tip end side (screw portion 8b side) of the bolt 8 being gripped by hand or the like, the head 8a of the bolt 8 is inserted from the bolt head insertion portion 10a into the inside of the square steel pipe 2. After that, the bolt 8 is moved to one side (in the example shown in FIG. 3 in the left direction in FIG. 3) along the bolt locking portion 10b as shown by the arrow shown in FIG. Then, as shown in FIG. 4, in a state where the bolt 8 is locked to the bolt locking portion 10b, the bolt 8 is set at a position where it is screwed to the bolt insertion hole 11 of the L-shaped metal fitting 7.

この場合、前述したとおり、ボルト係止部10bの幅(図2に示す長さB)は、ボルト8の外径(M16の場合16mm)よりも小さく、かつ、ボルト8の首部の径(頭部8aとねじ部8bとの境界部の軸径)(例えばM16の場合14.6mm)より大きな寸法(例えば、15.5mm等)とされているので、ボルト8から手を離しても、ボルト8が角形鋼管2の内部に落下することなく、ボルト係止部10bに係止された状態となる。 In this case, as described above, the width of the bolt locking portion 10b (length B shown in FIG. 2) is smaller than the outer diameter of the bolt 8 (16 mm in the case of M16), and the diameter of the neck portion of the bolt 8 (head). Since the dimension is larger than the shaft diameter of the boundary between the portion 8a and the threaded portion 8b (for example, 14.6 mm in the case of M16) (for example, 15.5 mm, etc.), even if the hand is released from the bolt 8, the bolt 8 is in a state of being locked to the bolt locking portion 10b without falling into the square steel pipe 2.

次に、同様にしてもう一本のボルト8についても、図5に示すように、ボルト係止部10bのもう一方の端部にセットする。この状態で、図6に示すように、角形鋼管2にセットされた2本のボルト8のねじ部8bをL字形金具7のボルト挿通孔11に挿入し、L字形金具7の上から、夫々のボルト8にワッシャ―4等を介してインパクトレンチ等を用いてナット9を締め付けることによって、L字形金具7を角形鋼管2に固定する。 Next, in the same manner, the other bolt 8 is also set at the other end of the bolt locking portion 10b as shown in FIG. In this state, as shown in FIG. 6, the screw portions 8b of the two bolts 8 set in the square steel pipe 2 are inserted into the bolt insertion holes 11 of the L-shaped metal fitting 7, respectively, from above the L-shaped metal fitting 7. The L-shaped metal fitting 7 is fixed to the square steel pipe 2 by tightening the nut 9 to the bolt 8 of the bolt 8 with an impact wrench or the like via a washer 4 or the like.

したがって、例えば、長尺の角形鋼管2の中間部分等、内側に手が入り難い部分であってもボルト8を容易に配置することができ、L字形金具7を、ボルト8とナット9によって、容易に角形鋼管2に固定することができる。 Therefore, the bolt 8 can be easily arranged even in a portion that is difficult to reach inside, such as an intermediate portion of a long square steel pipe 2, and the L-shaped metal fitting 7 is provided by the bolt 8 and the nut 9. It can be easily fixed to the square steel pipe 2.

そして、L字形金具7のボルト挿入孔12を使用して、例えば同種の角形鋼管やリップ溝形鋼等の他の鋼材(図示せず)をボルト8及びナット9等でねじ止めすることにより、L字形金具7を介して角形鋼管2と他の鋼材とを連結(結合)することができる。 Then, by using the bolt insertion hole 12 of the L-shaped metal fitting 7, for example, another steel material (not shown) such as a square steel pipe or lip channel steel of the same type is screwed with a bolt 8 and a nut 9 or the like. The square steel pipe 2 and other steel materials can be connected (combined) via the L-shaped metal fitting 7.

また、本実施形態では、コの字状の締結部材等を使用することなく、通常のボルト8をそのまま使用することができるので、例えば、ボルト8として、M16等の径の太い物を使用することができ、従来では難しかったより強度が必要とされる部分にも適用することができる。 Further, in the present embodiment, the normal bolt 8 can be used as it is without using a U-shaped fastening member or the like. Therefore, for example, a bolt 8 having a large diameter such as M16 is used. It can be applied to parts where strength is required, which was difficult in the past.

以上のように、L字形金具7の角形鋼管2への取り付け作業では、従来のように、手や治具などが届きにくい角形鋼管2内にボルトなどの締結具を差し入れるなどの面倒な作業をしなくても、L字形金具7の締結作業を角形鋼管の外で容易、迅速に行うことができる。このため、角形鋼管2が長大であり、かつその途中部分にL字形金具7を固定する必要がある場合でも、L字形金具7の角形鋼管2に対する取り付けを、角形鋼管2の外から簡単かつ確実に実施することができる。 As described above, in the work of attaching the L-shaped metal fitting 7 to the square steel pipe 2, it is troublesome work such as inserting a fastener such as a bolt into the square steel pipe 2 which is difficult to reach by hands or jigs as in the past. The L-shaped metal fitting 7 can be fastened easily and quickly outside the square steel pipe without the need for the above. Therefore, even if the square steel pipe 2 is long and it is necessary to fix the L-shaped metal fitting 7 in the middle portion thereof, the L-shaped metal fitting 7 can be easily and surely attached to the square steel pipe 2 from the outside of the square steel pipe 2. Can be carried out.

ところで、上述した実施形態では、角形鋼管2に、ボルト頭部挿入部10aとボルト係止部10bとを具備したボルト締結孔10を設けている。このボルト締結孔10の形成は、角形鋼管2に比較的面積の広い開口部を形成することになるため、L字形金具7と角形鋼管2との固定部分の強度が低くなってしまう可能性が考えられる。 By the way, in the above-described embodiment, the square steel pipe 2 is provided with a bolt fastening hole 10 having a bolt head insertion portion 10a and a bolt locking portion 10b. Since the bolt fastening hole 10 forms an opening having a relatively large area in the square steel pipe 2, the strength of the fixed portion between the L-shaped metal fitting 7 and the square steel pipe 2 may be lowered. Conceivable.

このため、図6に示したように、角形鋼管にL字形金具を取り付けた状態で、両者に引張り荷重を負荷して強度試験を行った。角形鋼管は、スーパーダイマ(商品名(登録商標)日本製鉄社製)、サイズが3.2×100×100のものを用いた。また、前述した従来技術である、コ字状の締結部材を使用する技術と比較するために、ボルトはM12のものを使用した。L字形金具は、材質がSS400、サイズがL−4×50のものを用いた。 Therefore, as shown in FIG. 6, with the L-shaped metal fittings attached to the square steel pipe, a tensile load was applied to both of them to perform a strength test. As the square steel pipe, a super dima (trade name (registered trademark) manufactured by Nippon Steel Corporation) and a size of 3.2 × 100 × 100 were used. Further, in order to compare with the above-mentioned conventional technique of using a U-shaped fastening member, an M12 bolt was used. As the L-shaped metal fitting, a material of SS400 and a size of L-4 × 50 was used.

また、上記実施形態に準じて角形鋼管とL字形金具とを締結した実施例1の他、比較の対象として、従来技術であるコの字状の締結部材を使用して締結した比較例1、M12のボルトで直接締結した比較例2、溶接により固着した比較例3について、強度試験を行った。 Further, in addition to the first embodiment in which the square steel pipe and the L-shaped metal fitting are fastened according to the above embodiment, as a comparison target, the first comparative example in which the square steel pipe and the L-shaped metal fitting are fastened using a U-shaped fastening member which is a prior art. Strength tests were conducted on Comparative Example 2 which was directly fastened with M12 bolts and Comparative Example 3 which was fixed by welding.

上記の強度試験は、実施例1、比較例1−3に対して、夫々2回ずつ実施し、角形鋼管の破断、ボルトの破断、溶接部の破断、ボルトの抜け等が発生した時点における引張り荷重(kN)(最大荷重)を測定して、これらの平均値をとった。この結果を以下に示す。
(1)比較例2=49.80kN
(2)実施例1=39.35kN
(3)比較例1=32.50kN
(4)比較例3=19.10kN
上記のように、実施例1、比較例1−3の強度は、ボルトで直接締結した比較例2が最も高く、実施例1、比較例1(従来技術)、比較例3(溶接)の順であった。このように、実施例1では、従来技術である比較例1や溶接した場合の比較例3より高い強度を有することが確認できた。
The above strength test was carried out twice for each of Example 1 and Comparative Example 1-3, and the tensile strength at the time when the square steel pipe was broken, the bolt was broken, the weld was broken, the bolt was pulled out, and the like. The load (kN) (maximum load) was measured and the average value of these was taken. The results are shown below.
(1) Comparative Example 2 = 49.80 kN
(2) Example 1 = 39.35 kN
(3) Comparative Example 1 = 32.50 kN
(4) Comparative Example 3 = 19.10 kN
As described above, the strengths of Example 1 and Comparative Example 1-3 are highest in Comparative Example 2 directly fastened with bolts, and in the order of Example 1, Comparative Example 1 (conventional technique), and Comparative Example 3 (welding). Met. As described above, it was confirmed that Example 1 has higher strength than Comparative Example 1 which is a conventional technique and Comparative Example 3 when welded.

以上、本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

2……角形鋼管、2a、2b、2c、2d……面、4……ワッシャ―、5……平板部、6……平板部、7……L字形金具、8……ボルト、8a……頭部、8b……ねじ部、8c……首部、9……ナット、10……ボルト締結孔、10a……ボルト頭部挿入部、10b……ボルト係止部、11……ボルト挿通孔、12……ボルト挿通孔。 2 ... Square steel pipe, 2a, 2b, 2c, 2d ... Surface, 4 ... Washer, 5 ... Flat plate, 6 ... Flat plate, 7 ... L-shaped metal fitting, 8 ... Bolt, 8a ... Head, 8b ... Screw part, 8c ... Neck, 9 ... Nut, 10 ... Bolt fastening hole, 10a ... Bolt head insertion part, 10b ... Bolt locking part, 11 ... Bolt insertion hole, 12 …… Bolt insertion hole.

Claims (6)

角形鋼管と他の鉄骨材とをL字形金具を用いて直交するかたちでボルト及びナットにより連結する鋼材連結機構において、
前記角形鋼管に設けられ、
前記ボルトの頭部が挿通可能な大きさとされたボルト頭部挿入部と、
当該ボルト頭部挿入部から、延在する長穴状のボルト係止部であって、幅が、前記ボルトの外径より小さく、かつ、前記ボルトの首部の軸径より大きいボルト係止部と、
を有するボルト締結孔を具備し、
前記ボルト頭部挿入部から前記ボルトの頭部を前記角形鋼管内に挿入し、前記ボルト係止部内をスライドさせて前記L字形金具との締結位置に前記ボルトを係止し、この状態で前記L字形金具のボルト孔に前記ボルトを挿通させて前記ナットで締結可能とされた
ことを特徴とする鋼材連結機構。
In a steel material connecting mechanism that connects a square steel pipe and other steel frame materials with bolts and nuts in an orthogonal manner using L-shaped metal fittings.
Provided on the square steel pipe
A bolt head insertion part having a size that allows the head of the bolt to be inserted, and a bolt head insertion portion.
A bolt locking portion extending from the bolt head insertion portion and having a width smaller than the outer diameter of the bolt and larger than the shaft diameter of the neck portion of the bolt. ,
Equipped with bolt fastening holes
The head of the bolt is inserted into the square steel pipe from the bolt head insertion portion, and the bolt is locked at a fastening position with the L-shaped metal fitting by sliding in the bolt locking portion. A steel material connecting mechanism characterized in that the bolt is inserted into a bolt hole of an L-shaped metal fitting and can be fastened with the nut.
角形鋼管と他の鉄骨材とをL字形金具を用いて直交するかたちでボルト及びナットにより連結する鋼材連結機構において、
前記角形鋼管に設けられ、
当該角形鋼管の幅方向中央部分に設けられ前記ボルトの頭部が挿通可能な大きさとされたボルト頭部挿入部と、
当該ボルト頭部挿入部から、前記幅方向の両端に向けて延在する長穴状のボルト係止部であって、前記角形鋼管の長さ方向の幅が、前記ボルトの外径より小さく、かつ、前記ボルトの首部の軸径より大きいボルト係止部と、
を有するボルト締結孔を具備し、
前記ボルト頭部挿入部から前記ボルトの頭部を前記角形鋼管内に挿入し、前記ボルト係止部内をスライドさせて当該ボルト係止部の両側端部に2つの前記ボルトを係止し、この状態で前記L字形金具のボルト孔に2つの前記ボルトを挿通させて前記ナットで締結可能とされた
ことを特徴とする鋼材連結機構。
In a steel material connecting mechanism that connects a square steel pipe and other steel frame materials with bolts and nuts in an orthogonal manner using L-shaped metal fittings.
Provided on the square steel pipe
A bolt head insertion portion provided in the central portion of the square steel pipe in the width direction and having a size that allows the head of the bolt to be inserted, and a bolt head insertion portion.
An elongated hole-shaped bolt locking portion extending from the bolt head insertion portion toward both ends in the width direction, and the width in the length direction of the square steel pipe is smaller than the outer diameter of the bolt. And a bolt locking part larger than the shaft diameter of the neck part of the bolt,
Equipped with bolt fastening holes
The head of the bolt is inserted into the square steel pipe from the bolt head insertion portion, and the two bolts are locked at both end portions of the bolt locking portion by sliding in the bolt locking portion. A steel material connecting mechanism characterized in that two bolts are inserted into the bolt holes of the L-shaped metal fitting in a state and can be fastened with the nut.
前記ボルトの外径が16mm以上である
ことを特徴とする請求項1又は2に記載の鋼材連結機構。
The steel material connecting mechanism according to claim 1 or 2, wherein the outer diameter of the bolt is 16 mm or more.
角形鋼管と他の鉄骨材とをL字形金具を用いて直交するかたちでボルト及びナットにより連結する鋼材連結方法において、
前記角形鋼管に、
前記ボルトの頭部が挿通可能な大きさとされたボルト頭部挿入部と、
当該ボルト頭部挿入部から、延在する長穴状のボルト係止部であって、幅が、前記ボルトの外径より小さく、かつ、前記ボルトの首部の軸径より大きいボルト係止部と、
を有するボルト締結孔を配設し、
前記ボルト頭部挿入部から前記ボルトの頭部を前記角形鋼管内に挿入し、前記ボルト係止部内をスライドさせて前記L字形金具との締結位置に前記ボルトを係止し、この状態で前記L字形金具のボルト孔に前記ボルトを挿通させて前記ナットで締結する
ことを特徴とする鋼材連結方法。
In a steel material connecting method in which a square steel pipe and another steel frame material are connected by bolts and nuts in an orthogonal manner using L-shaped metal fittings.
In the square steel pipe,
A bolt head insertion part having a size that allows the head of the bolt to be inserted, and a bolt head insertion portion.
A bolt locking portion extending from the bolt head insertion portion and having a width smaller than the outer diameter of the bolt and larger than the shaft diameter of the neck portion of the bolt. ,
Arrange the bolt fastening holes with
The head of the bolt is inserted into the square steel pipe from the bolt head insertion portion, and the bolt is locked at a fastening position with the L-shaped metal fitting by sliding in the bolt locking portion. A steel material connecting method characterized in that the bolt is inserted into a bolt hole of an L-shaped metal fitting and fastened with the nut.
角形鋼管と他の鉄骨材とをL字形金具を用いて直交するかたちでボルト及びナットにより連結する鋼材連結方法において、
前記角形鋼管に、
当該角形鋼管の幅方向中央部分に設けられ前記ボルトの頭部が挿通可能な大きさとされたボルト頭部挿入部と、
当該ボルト頭部挿入部から、前記幅方向の両端に向けて延在する長穴状のボルト係止部であって、前記角形鋼管の長さ方向の幅が、前記ボルトの外径より小さく、かつ、前記ボルトの首部の軸径より大きいボルト係止部と、
を有するボルト締結孔を配設し、
前記ボルト頭部挿入部から前記ボルトの頭部を前記角形鋼管内に挿入し、前記ボルト係止部内をスライドさせて当該ボルト係止部の両側端部に2つの前記ボルトを係止し、この状態で前記L字形金具のボルト孔に2つの前記ボルトを挿通させて前記ナットで締結する
ことを特徴とする鋼材連結方法。
In a steel material connecting method in which a square steel pipe and another steel frame material are connected by bolts and nuts in an orthogonal manner using L-shaped metal fittings.
In the square steel pipe,
A bolt head insertion portion provided in the central portion of the square steel pipe in the width direction and having a size that allows the head of the bolt to be inserted, and a bolt head insertion portion.
An elongated hole-shaped bolt locking portion extending from the bolt head insertion portion toward both ends in the width direction, and the width in the length direction of the square steel pipe is smaller than the outer diameter of the bolt. And a bolt locking part larger than the shaft diameter of the neck part of the bolt,
Arrange the bolt fastening holes with
The head of the bolt is inserted into the square steel pipe from the bolt head insertion portion, and the two bolts are locked at both end portions of the bolt locking portion by sliding in the bolt locking portion. A steel material connecting method characterized in that two bolts are inserted into the bolt holes of the L-shaped metal fitting and fastened with the nuts in the state.
前記ボルトの外径が16mm以上である
ことを特徴とする請求項4又は5に記載の鋼材連結方法。
The steel material connecting method according to claim 4 or 5, wherein the outer diameter of the bolt is 16 mm or more.
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