초록 ▼

A strap-tensioning device includes a base that receives a rotatable drum rigidly connected to toothed wheels, and configured to engage a holding pawl; tensioning lever rotatably mounted by hinging onto the drum, and provided with a pawl for driving the toothed wheels; an unlocking pawl configured to

A strap-tensioning device includes a base that receives a rotatable drum rigidly connected to toothed wheels, and configured to engage a holding pawl; tensioning lever rotatably mounted by hinging onto the drum, and provided with a pawl for driving the toothed wheels; an unlocking pawl configured to release the toothed wheels from the respective engagement thereof with the holding pawl and with the driving pawl, rotatably mounted, independently of the rotation of the tensioning lever, by hinging onto the drum. The unlocking lever is rigidly connected to two parallel cams having the same profile, and configured to simultaneously engage, respectively, the holding pawl and the driving pawl, so as to release the rotation of the drum.

대표청구항 ▼

1. A strap-tensioning device comprising: a base;a strap rigidly connected to a first end of the base;a drum mounted for rotation to a second end of the base, the drum configured to receive an end of the strap;wheels to which the drum is rigidly connected;a first pawl configured to slide in the base

1. A strap-tensioning device comprising: a base;a strap rigidly connected to a first end of the base;a drum mounted for rotation to a second end of the base, the drum configured to receive an end of the strap;wheels to which the drum is rigidly connected;a first pawl configured to slide in the base and to which the wheels engage under the action of a first biasing force;a tensioning lever rotatably mounted to the drum, and provided with a second pawl configured to drive the wheels, the second pawl configured to mesh by default in the wheels under action of a second biasing force and also slide in the lever;an unlocking lever configured to release the wheels from respective engagement thereof with the first pawl and with the second pawl, the unlocking lever being rotatably mounted for actuation independently of the rotation of the tensioning lever, by hinging onto the drum; andcams to which the unlocking lever is rigidly connected, the cams configured to simultaneously engage, respectively, with the first pawl and with the second pawl to release the rotation of the drum. 2. The strap-tensioning device of claim 1, wherein an end of the strap is secured to the base, the end being mounted on an axis configured to wind and store the strap. 3. The strap-tensioning device of claim 2, further comprising a crank configured to rotate the axis. 4. The strap-tensioning device of claim 3, wherein the crank is hinged on an end of the axis. 5. The strap-tensioning device of claim 4, wherein the crank is configured locking against the base when not in use by inserting a free end of the crank into a through aperture provided in the base. 6. The strap-tensioning device of claim 1, wherein the tensioning lever is rotatably mounted to the drum by hinged connection. 7. The strap-tensioning device of claim 1, wherein the wheels comprise toothed wheels. 8. A strap-tensioning device comprising: a base;a drum received by the base for rotation with respect thereto;a strap having a first end connected to the drum and a second end;wheels to which the drum is rigidly connected such that rotation of the wheels results in simultaneous rotation of the drum;a first pawl received in the base and configured to engage the wheels;a tensioning lever hingedly connected to the drum and configured to drive the wheels, the tensioning lever having a second pawl configured to engage by default the wheels;an unlocking lever configured to release the wheels from respective engagement thereof with the first pawl and with the second pawl, the unlocking lever being mounted for actuation independently of the tensioning lever; andcams to which the unlocking lever is operatively connected, the cams configured to simultaneously engage, respectively, the first pawl and the second pawl to release rotation of the drum. 9. The strap-tensioning device of claim 8, wherein each wheel has a first wheel orifice and a second wheel orifice. 10. The strap-tensioning device of claim 9, wherein the drum comprises a first drum section connected to the first wheel orifice. 11. The strap-tensioning device of claim 10, wherein the drum comprises a second drum section connected to the second wheel orifice such that the second drum section is spaced from the first drum section. 12. The strap-tensioning device of claim 11, wherein the first end of the strap is received in the space between the first drum section and the second drum section. 13. The strap-tensioning device of claim 8, wherein the base comprises: a first base portion;a second base portion extending in parallel to and spaced from the first base portion; anda base plate which connects the first base portion and the second base portion to each other. 14. The strap-tensioning device of claim 13, wherein an end of the first base portion and an end of the second base portion each define a flange having a central bore. 15. The strap-tensioning device of claim 14, wherein the drum is received in the flange of the first base portion and the second base portion. 16. The strap-tensioning device of claim 13, wherein the tensioning member comprises: a first tensioning member portion;a second tensioning member portion extending in parallel to and spaced from the first base portion; anda tensioning member plate which connects the first tensioning member portion and the second tensioning member portion to each other. 17. The strap-tensioning device of claim 16, wherein an end of the first tensioning member portion and an end of the second tensioning member portion each define a flange having a central bore. 18. The strap-tensioning device of claim 16, wherein the drum is received in the flange of the first tensioning member portion and the second tensioning member portion. 19. A strap-tensioning device comprising: a base having a pair of spaced apart base portions;wheels each having a pair of wheel orifices extending therethrough;a drum having a pair of drum sections, each drum section respectively connected to a wheel orifice such that the drum sections are spaced from each other;a strap having a first end received in the space between the drum sections;an axis extending between and through the base portions and configured to wind and store the strap;a first pawl received in the base and configured to engage the wheels;a tensioning lever hingedly connected to the drum and configured to drive the wheels, the tensioning lever having a second pawl configured to engage by default the wheels;an unlocking lever configured to release the wheels from respective engagement thereof with the first pawl and with the second pawl, the unlocking lever being mounted for actuation independently of the tensioning lever; andcams to which the unlocking lever is operatively connected, the cams configured to simultaneously engage, respectively, the first pawl and the second pawl to release rotation of the drum. 20. The strap-tensioning device of claim 19, further comprising a crank configured to rotate the axis.