Biased strap tension retaining device
View Patent ↗A strap tension retaining device is configured for a use with a bulk unit secured by a strap under tension. Such a bulk unit load has a corner and defines a bulk unit perimeter. The strap tension retaining device includes a fixed base element, fixed relative to the bulk unit load, a floating element movable relative to the fixed base element, a biasing element mounted between the floating element and the fixed base element and a guide element mounting the floating element to the fixed base element to guide movement of the floating element relative to the fixed base element. The strap tension retaining device is positioned at about the corner of the bulk unit load with the strap positioned around the bulk unit perimeter of the bulk unit load, over the strap tension retaining device floating element. When the strap is tensioned a force is exerted by the strap on the floating element to force the biasing element against the bias direction. Changes in strap tension due to a decrease or increase in the bulk unit perimeter are accommodated by movement of the floating element.
1. A strap tension retaining device for use with a bulk unit load secured by a strap under tension, the bulk unit load having a corner, the bulk unit load having a perimeter, the strap tension retaining device comprising:
a fixed base element, the fixed base element being fixed to the bulk unit load;
a floating element, the floating element being movable relative to the fixed base element, the floating element having a strap traversing region;
a biasing element operably mounting the floating element and the fixed base element, the biasing element exerting a force in a bias direction; and
a guide element operably mounting the floating element to the fixed base element to guide movement of the floating element relative to the fixed base element, wherein the strap tension retaining device is positioned at the corner of the bulk unit load and the strap is positioned around the bulk unit load, around the perimeter, the strap traversing over the strap tension retaining device, over the floating element strap traversing region, and wherein when the strap is tensioned, a force exerted by the strap on the floating element urges the biasing element against the bias direction, and wherein a change in the bulk unit perimeter is accommodated by movement of the floating element.
2. The strap tension retaining device in accordance with claim 1 wherein a negative change in the bulk unit perimeter is accommodated by the floating element moving in the bias direction to preclude slack in the strap.
3. The strap tension retaining device in accordance with claim 1 wherein a positive change in the bulk unit perimeter is accommodated by the floating element moving against the bias direction to preclude over-tensioning the strap.
4. The strap tension retaining device in accordance with claim 1 including two guide elements fixedly mounted to the fixed base element, and including two biasing elements.
5. The strap tension retaining device in accordance with claim 4 wherein the biasing elements are springs disposed about the guide elements, between the fixed base element and the floating element.
6. The strap tension retaining device in accordance with claim 1 including means for constraining movement of the floating element to a plane defined by the fixed element.
7. The strap tension retaining device in accordance with claim 6 wherein the means for constraining are posts extending from the fixed base element.
8. The strap tension retaining device in accordance with claim 7 wherein the floating element includes openings for receiving the posts.
9. The strap tension retaining device in accordance with claim 8 wherein the posts are threaded into the fixed base element.
10. The strap tension retaining device in accordance with claim 1 including means for limiting movement of the floating element relative to the fixed base element.
11. The strap tension retaining device in accordance with claim 10 wherein the guide element is a post and wherein the means for limiting movement of the floating element is a spacer disposed on each post outwardly of the floating element.
12. The strap tension retaining device in accordance with claim 1 wherein the floating element includes a strap traversing region formed as an inclined surface.