Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SCREW TYPE REINFORCEMENT JOINT OF IRREGULAR SHAPE STEEL BAR AND MANUFACTURING METHOD THEREOF
PROBLEM TO BE SOLVED: To provide a screw type reinforcement joint of an irregular shape steel bar and a manufacturing method thereof which have excellent productivity, and in which no practical problem of reduction in proof stress due to processing of the male screw part occurs, and necessary proof strength can be obtained.SOLUTION: A steel bar joint comprises: steel bars 1, 1 in a pair connected with each other, each of which is a deformed steel bar having protrusions 1b on the outer periphery of a steel bar body 1a; and a cylindrical coupler 2 screwed to the male screw portions 1c, 1c of steel bars 1 and 1. The male screw portion 1c of each steel bar 1 has a thread groove diameter D3 smaller than an outer diameter D1 of the reinforcing bar body, and thread diameters D3and D3' greater than the outer diameter D1 of the steel bar body and smaller than the maximum diameter D2. The male screw portion 1c is harder than other portions of the steel bar 1 due to work hardening caused by rolling for thread formation. A lock nut may be further provided.SELECTED DRAWING: Figure 1
【課題】生産性に優れ、かつ雄ねじ部の加工による耐力低下の実用上の問題が生じず、必要な耐力が得られる異形鉄筋のねじ式鉄筋継手およびその製造方法を提供する。【解決手段】鉄筋本体１ａの外周に突条１ｂを有する異形鉄筋である一対の鉄筋１，１を相互に接続する鉄筋継手である。両鉄筋１，１の雄ねじ部１ｃ，１ｃに螺合する筒状のカプラー２を備える。各鉄筋１の雄ねじ部１ｃは、ねじ溝径Ｄ３が鉄筋本体外径Ｄ１よりも細く、ねじ山径Ｄ３２、Ｄ３２′が鉄筋本体外径Ｄ１よりも太くかつ最大径Ｄ２よりも細い。この雄ねじ部１ｃの硬さは、転造によるねじ形成に伴う加工硬化により、鉄筋１の他の部分よりもよって硬くなっている。ロックナットをさらに設けても良い。【選択図】図１
SCREW TYPE REINFORCEMENT JOINT OF IRREGULAR SHAPE STEEL BAR AND MANUFACTURING METHOD THEREOF
PROBLEM TO BE SOLVED: To provide a screw type reinforcement joint of an irregular shape steel bar and a manufacturing method thereof which have excellent productivity, and in which no practical problem of reduction in proof stress due to processing of the male screw part occurs, and necessary proof strength can be obtained.SOLUTION: A steel bar joint comprises: steel bars 1, 1 in a pair connected with each other, each of which is a deformed steel bar having protrusions 1b on the outer periphery of a steel bar body 1a; and a cylindrical coupler 2 screwed to the male screw portions 1c, 1c of steel bars 1 and 1. The male screw portion 1c of each steel bar 1 has a thread groove diameter D3 smaller than an outer diameter D1 of the reinforcing bar body, and thread diameters D3and D3' greater than the outer diameter D1 of the steel bar body and smaller than the maximum diameter D2. The male screw portion 1c is harder than other portions of the steel bar 1 due to work hardening caused by rolling for thread formation. A lock nut may be further provided.SELECTED DRAWING: Figure 1
【課題】生産性に優れ、かつ雄ねじ部の加工による耐力低下の実用上の問題が生じず、必要な耐力が得られる異形鉄筋のねじ式鉄筋継手およびその製造方法を提供する。【解決手段】鉄筋本体１ａの外周に突条１ｂを有する異形鉄筋である一対の鉄筋１，１を相互に接続する鉄筋継手である。両鉄筋１，１の雄ねじ部１ｃ，１ｃに螺合する筒状のカプラー２を備える。各鉄筋１の雄ねじ部１ｃは、ねじ溝径Ｄ３が鉄筋本体外径Ｄ１よりも細く、ねじ山径Ｄ３２、Ｄ３２′が鉄筋本体外径Ｄ１よりも太くかつ最大径Ｄ２よりも細い。この雄ねじ部１ｃの硬さは、転造によるねじ形成に伴う加工硬化により、鉄筋１の他の部分よりもよって硬くなっている。ロックナットをさらに設けても良い。【選択図】図１
SCREW TYPE REINFORCEMENT JOINT OF IRREGULAR SHAPE STEEL BAR AND MANUFACTURING METHOD THEREOF
異形鉄筋のねじ式鉄筋継手およびその製造方法
WAKIYAMA KOZO (Autor:in) / HIRAI KEIJI (Autor:in) / FUKUDA AKIRA (Autor:in)
19.04.2018
Patent
Elektronische Ressource
Japanisch
IPC:
E04C
STRUCTURAL ELEMENTS
,
Bauelemente
/
B21F
Bearbeiten oder Verarbeiten von Draht aus Metall
,
WORKING OR PROCESSING OF METAL WIRE
/
B21H
MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
,
Herstellen besonderer Gegenstände aus Metall durch Walzen, z.B. Schrauben, Räder, Ringe, Büchsen, Kugeln
/
E04G
SCAFFOLDING
,
Baugerüste
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