Clamping device for cables and the like

Claim 1

A locking device comprising essentially a hollow cylindrical body having a male screw formed about the outer periphery thereof and a clamping pipe having about the inner circumferential face thereof a female screw engageable with said male screw of the cylindrical body, said cylindrical body having a plurality of annularly arranged independent gripping pieces projected from one side end of the body, said gripping pieces including notched portions formed about the inner circumferential face of their portions excluding the top end portion to form elastic leg portions; said elastic leg portions receiving a packing pipe fitted in the notched portion thereof, the respective ends of said packing pipe abutting onto the respective side walls of said notched portion of the gripping pieces, said gripping pieces further having about the outer periphery at the top end portion thereof means for stopping and fixing the clamping pipe in the direction opposite to the lead direction of the male screw of the cylindrical body comprising a notch in the outer circumferential surface of each elastic leg portion, said clamping pipe being formed about the inner circumference of one end portion thereof with a tapered portion to which the outer periphery of the top end portion of each gripping piece abuts, and having at said tapered portion at least one wedge-shaped member engageable with said notches on the gripping pieces in a ratchet-like manner, wherein the clamping pipe is applied from the top end of the gripping pieces of the cylindrical body and threadably engaged with the cylindrical body, whereby top end portions of gripping pieces are pressed radially toward the center of the locking device to cause the packing pipe to undergo deformation to decrease in its diametral size, said top end portions being sized and spaced so as not to overlap each other, an annular groove being formed at the side end portion of said notched portion and extending toward the cylindrical body, said annular groove being empty before deformation of said packing pipe and receiving therein an end portion of said packing pipe as the pipe undergoes deformation to decrease its diametral size.