ROD CONNECTING STRUCTURE

PROBLEM TO BE SOLVED: To improve rigidity of a connection part of rods and prevent positional dislocation of a formed hole to the utmost so as to attain accurate construction. SOLUTION: In this rod connecting structure, rods 2 inserted into the ground to form a hole in the ground are connected lengt...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KITAFUJI GORO, MATSUMOTO MITSUNORI, KADOWAKI RYOJI, MORI SHINOBU, NAGAINO MITSUSHI, MASUDA SHIGEO
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To improve rigidity of a connection part of rods and prevent positional dislocation of a formed hole to the utmost so as to attain accurate construction. SOLUTION: In this rod connecting structure, rods 2 inserted into the ground to form a hole in the ground are connected lengthwise. In this case, the end part of one rod 2 out of the upper and lower rods is provided with a fit-in square cylindrical part 3, and the end part of the other rod 2 is provided with a fit-in square hole part 4. The fitin square cylindrical part 3 is fitted into the fit-in square hole part 4 and connected by slip-off preventive means 5. A rigid reinforcing material 6 is removably provided at the outer surface part of a fit-in part between the fit-in square cylindrical part 3 and fit-in square hole part 4 of the upper and lower rods 2, over the upper and lower rods 2.