Cargo strap tensioner
A strap tensioner includes a frame, a bridge bar, a stopper, a winding shaft, a gear assembly, a crank and an observation hole. The frame has two sidewalls. The bridge bar is fixed between the two sidewalls. The stopper is of an L-shape and extends from one of the sidewalls. The gear assembly is mounted on the other sidewall and has a worm and a worm gear. The worm gear is axially connected to the winding shaft. The worm is provided with a drive shaft. The crank includes a stem connected to the drive shaft, an arm pivotedly connected to the stem and being capable of being either expanded along the stem or folded over the stem, and a handle on the arm. The observation hole is formed in the sidewall. The handle is blocked by the stopper when the arm is folded over the stem.
1. A cargo strap tensioner comprising:
a U-shaped frame, having a first sidewall, a second sidewall and a bottom plate connected between the first and second sidewalls;
a bridge bar, fixed at a top portion of the U-shaped frame between the first and second sidewalls;
a stopper, being of an L-shape, extending from the first sidewall;
a winding shaft, rotatably disposed between the first and second sidewalls;
a gear assembly, mounted on the first sidewall, having a worm and a worm gear engaging with the worm, the worm gear being axially connected to the winding shaft, and the worm being located aside the worm gear along a lengthwise direction of the first sidewall and provided with a drive shaft;
a crank located at the first sidewall, comprising:
a stem, connected to the drive shaft;
an arm, with one end pivotedly connected to the stem, and being capable of folding on or unfolding over to extend along with the stem; and
a handle, perpendicularly fixedly secured on the arm; and
an observation hole, formed in the second sidewall, and adjacent to the winding shaft;
wherein the handle is blocked by the stopper when the arm folds on the stem to rotate the handle from a first position to a second position in an approximate 180 degrees.
2. The cargo strap tensioner of claim 1 , wherein a corner of the stopper is provided with a rib.
3. The cargo strap tensioner of claim 1 , wherein the arm is connected to the stem by a pivot.
4. The cargo strap tensioner of claim 1 , wherein the gear assembly further comprises a cover.