Hose clamp and method of manufacturing the same

摘要

The pinching operation is facilitated. A hose clamp (H1) is formed by bending a strip-like plate material (1) into a ring-like configuration, and includes a first end portion (5) having a first pinching operation surface (9), and a second end portion (6) having a second pinching operation surface (15). A through-hole (7) is open near the center in the longitudinal direction of the first pinching operation surface (9). At the time of bending into ring-like configuration, expansion regions (19) arranged at both side portions in the width direction of the second pinching operation surface (15) are folded at folding edges (20) with respect to a proximal region (18), whereby the second pinching operation surface (15) is narrowed in the width direction and can enter the through-hole (7). After bending into ring-like configuration, the expansion regions (19) are unfolded at the folding edges (20) and regain a widened state.

主权项

1. A hose clamp which is formed into a ring-like shape by bending a strip-like plate material so as to cause it to cross itself in a peripheral plane to thereby form a tightening portion and which can tighten a connection portion between a hose and a mating member thereof by means of this tightening portion, the hose clamp being formed into a shape substantially in line symmetry with respect to an X axis that is a central axis line extending along a longitudinal, lengthwise direction thereof, the hose clamp comprising:
a first end portion arranged at one longitudinal end side and having a first pinching operation surface at an end portion thereof; and a second end portion arranged at the other longitudinal end side and having at an end portion thereof a second pinching operation surface opposite the first pinching operation surface, wherein the hose clamp has an elongated-hole-like through-hole which is open on the first end portion side and is located nearer to the center in the longitudinal direction than the first pinching operation surface; the hose clamp has a small-width portion which is formed on the second end portion side and located nearer to the center in the longitudinal direction than the second pinching operation surface, the small-width portion being insertable into the through-hole; and the second pinching operation surface includes a proximal region formed to have a smaller width than an opening width of the through-hole and an expansion region arranged at a side edge portion in the width direction of the proximal region so as to be foldable relative to the proximal region, thereby rendering an outer width dimension of the second pinching operation surface wider than the opening width of the through-hole.