Patent ID: 8806721

Claim:
A strap-band type connecting device comprising: an open-ended annular strap band having one end side and the other end side, both of which are curved to overlap each other so as to wind around an article to be wound; a housing fixedly secured to said one end side of said strap band; a rod screw rotatably provided within said housing, said rod screw having a helical thread formed at predetermined pitch intervals; a series of slits circumferentially provided on said other end side of said strap band at regular intervals in parallel relationship with each other, said slits traversing across a width direction of said strap band in an oblique fashion against a circumferential direction of said strap band; an array of teeth each having bridged brace between the neighboring slits to make said helical thread engage with said bridged brace when said helical thread of said rod screw is brought into engagement with said slits within said housing; whereby upon rotationally operating said rod screw in a predetermined direction, said rod screw makes said helical thread slide along said bridged brace so as to move said one end side in relative to said other end side to diametrically reduce said strap band, so that said strap band deforms to tightly wind around said article to be wound, said bridged brace having a cross piece segment provided by curvedly deforming said bridged brace in a lengthwise direction to have a width-reduced groove along said lengthwise direction, said groove having a recess as a convex portion projected toward a central portion of said strap band or in an outward direction from said strap band.