초록 ▼

The tensioning device of a tree stand has a tension lever, a ratchet wheel and a tensioning body coaxial therewith, and a lever catch that is movably guided on the tension lever like a ratchet or one-way coupling and that is detachably mechanically linked to the ratchet wheel and that when the tensi

The tensioning device of a tree stand has a tension lever, a ratchet wheel and a tensioning body coaxial therewith, and a lever catch that is movably guided on the tension lever like a ratchet or one-way coupling and that is detachably mechanically linked to the ratchet wheel and that when the tension lever is actuated to create tension engages the teeth of the ratchet wheel such that a part connected to elements for retaining the tree is wound on the tensioning body, thus securely clamping the tree. The tensioning device furthermore has a first catch for engaging the teeth of the ratchet wheel and blocks the latter's rotation in the sense of unwinding of the tensioning body. For each release actuation of the tension lever, the first catch disengages from the teeth of the ratchet wheel, whereby thereupon a second catch blocks the release when the second catch strikes the blocking flank of the tooth of the ratchet wheel in the release direction.

대표청구항 ▼

The invention claimed is: 1. Tree stand, comprising a foot part, at least two retaining elements arranged about an axis of symmetry of the foot part, the retaining elements each being movable between a release position, in which a tree is adjustable in said tree stand or can be removed therefrom, a

The invention claimed is: 1. Tree stand, comprising a foot part, at least two retaining elements arranged about an axis of symmetry of the foot part, the retaining elements each being movable between a release position, in which a tree is adjustable in said tree stand or can be removed therefrom, and a retaining position in which a tree is held in said tree stand, in a plane intersecting the axis of symmetry, at least one flexible connecting part that can be loaded with tension, a tensioning device comprising a rotatable tension lever, a ratchet wheel, a tensioning body arranged coaxially with the ratchet wheel, and a lever catch that is movably guided on said tension lever to act as a ratchet or one-way coupling and that is detachably mechanically linked to said ratchet wheel, whereby said connecting part is wound on said tensioning body, thus securely clamping said tree, the tensioning device further comprising a first catch which enters a gap between two adjacent teeth of said ratchet wheel and blocks rotation of the ratchet wheel in a direction of unwinding the connecting part, and which, for each release actuation of said tension lever counter to the direction of its movement of said tension lever during tensioning actuation, disengages from said teeth of said ratchet wheel, thus resulting in a release movement of said tensioning body by an unwinding path that is shorter than a maximum unwinding path of said tensioning body, and the tensioning device further comprising a second catch which enters a gap between two adjacent teeth of said ratchet wheel, thereby to block further release after said second catch strikes one of said two adjacent teeth defining an extreme of said gap in the release direction. 2. Tree stand, with a foot part, at least two retaining elements that are arranged movably about an axis of symmetry of the foot part, the retaining elements being movable between a release position, in which a tree is adjustable in said tree stand or can be removed therefrom, and a retaining position, in which a tree is held in said tree stand, in a plane intersecting the axis of symmetry, at least one flexible connecting part that can be loaded with tension, a tensioning device comprising a rotatable tension lever, a first ratchet wheel, a tensioning body arranged coaxially with the first ratchet wheel, and a lever catch that is movably guided on said tension lever to act as a ratchet or one-way coupling and that is detachably mechanically linked to said first ratchet wheel and that when said tension lever is actuated to create tension, engages the teeth of said first ratchet wheel whereby said connecting part is wound on said tensioning body, thus securely clamping said tree, the tensioning device further comprising a first catch which engages the teeth of said first ratchet wheel and blocks rotation of the first ratchet wheel in a direction of unwinding the connecting part, a second ratchet wheel and a second catch, whereby, for each release actuation of said tension lever counter to its movement during tensioning actuation, said first catch disengages from said teeth of said first ratchet wheel, resulting in a release movement of said tensioning body by an unwinding path that is shorter than the maximum unwinding path of said tensioning body and then the second catch blocks further release after said second catch strikes a back tooth, in the unwinding direction, of said second ratchet wheel. 3. Tree stand in accordance with claim 2, wherein said second ratchet wheel is coaxial with said first ratchet wheel and has the same phase and rotates therewith. 4. Tree stand in accordance with claim 2 or 3, wherein said first ratchet wheel and said second ratchet wheel have a same tooth module. 5. Tree stand in accordance with any of claims 2 or 3, wherein said first ratchet wheel and said second ratchet wheel have tooth modules that are different from one another. 6. Tree stand in accordance with any of claims 1 through 3, wherein said first catch and said second catch alternately block and release tooth by tooth the respective first and second ratchet wheels with which said first and second catches are associated. 7. Tree stand in accordance with claim 6, wherein said first and second catches are coupled to one another whereby when said respective first or second ratchet wheel is released by the respective first or second catch, the other of said first and second catches has already moved into a gap between adjacent teeth of the other of said first and second ratchet wheels. 8. Tree stand in accordance with any of claims 1 through 3, wherein said first catch is so mounted as to enter into blocking engagement with the ratchet wheel with which the first catch is associated by gravitational force or wherein the tree stand further comprises a spring which effects said blocking engagement by force of said spring. 9. Tree stand in accordance with any of claims 1 through 3, further comprising a control means integral with said tension lever and having a curved surface for engaging said first catch thereby to cause said first catch to disengage from said teeth of said ratchet wheel, and, when said tension lever approaches an upper position, to disengage said first catch from said teeth of said associated ratchet wheel. 10. Tree stand in accordance with any of claims 1 through 3, wherein said tensioning device further comprises a housing and a spring arranged between said first and second catches, said spring actuating said first catch to engage said teeth of said ratchet wheel associated with said first catch. 11. Tree stand in accordance with any of claims 1 through 3, wherein said retaining elements comprise ached, smooth sliding surfaces or support bodies adapted to slide on the trunk of said ratchet wheel. 12. Tree stand in accordance with any of claims 1 through 3, further comprising key or switching means for suppressing function of said decond catch of effecting incremental transition of said retaining elements from the retaining position thereof to the release position thereof, thereby to facilitate removing of a tree from said tree stand. 13. Tree stand in accordance with claim 12, further comprising an aperture in said tension lever for receiving the key, the aperture being so located that the key, when inserted in the aperture, holds said second catch against the action of said spring thereby to disengage said second catch from said teeth of said ratchet wheel with which said catch is associated. 14. Tree stand in accordance with any of claims 1 through 3, further comprising a control cam so arranged as to move said second catch into the gap between adjacent teeth of the ratchet wheel with which the second catch is associated. 15. Tree stand in accordance with claim 14, wherein said control cam is integral with said tension lever. 16. Tree stand in accordance with any of claims 1 through 3, wherein said first and said second catch are pivoted for rocking about a common axis of rotation into and out of engagement with said teeth of the ratchet wheel with which the respective said catch is associated. 17. Tree stand in accordance with claim 16, wherein said first and said second catch are rigidly joined to one another and, depending on the diameter and tooth module of the ratchet wheel with which the respective said catch is associated, form an angle such that, when said first catch is in a disengaged position, said second catch moves into a gap between adjacent teeth of the ratchet wheel with which said second catch is associated, and blocks rotation thereof in a direction of unwinding of the connecting part. 18. Tree stand, comprising a foot part, at least two retaining elements arranged about an axis of symmetry of the foot part, the retaining elements each being movable between a release position, in which a tree is adjustable in said tree stand or can be removed therefrom, and a retaining position, in which a tree is held in said tree stand, in a plane intersecting the axis of symmetry, comprising at least one flexible connecting part that can be loaded with tension, a tensioning device comprising a rotatable tension lever, a ratchet wheel, a tensioning body arranged coaxially with the ratchet wheel, and a lever catch that is movably guided on said tension lever to act as a ratchet or one-way coupling and that is detachably mechanically linked to said ratchet wheel and that, when said tension lever is actuated to create tension, engages teeth of said ratchet wheel whereby said connecting part is wound on said tensioning body, thus securely clamping said tree, the tensioning device further comprising a first catch which engages the teeth of said ratchet wheel and blocks rotation of the ratchet wheel in a direction of unwinding the connecting part, and which, for each release actuation of said tension lever counter to direction of movement of said tension lever during tensioning actuation, disengages from said teeth of said ratchet wheel, this resulting in a release movement of said tensioning body by an unwinding path that is shorter than a maximum unwinding path, and the first catch then again moves into a gap between adjacent teeth of said ratchet wheel and blocks further release after said catch strikes the back tooth, in the unwinding direction, of said gap.