초록

A scaffold includes a platform, a pivotable leg unit, and a leg lock. The leg lock is used to lock the leg unit in an extended position for use of the scaffold.

대표청구항 ▼

1. A scaffold comprisinga platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite first and second plank end portions, the plank end cap being coupled to the first plank end portion, a leg unit coupled to the platform for pivota

1. A scaffold comprisinga platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite first and second plank end portions, the plank end cap being coupled to the first plank end portion, a leg unit coupled to the platform for pivotable movement relative thereto about a leg pivot axis between an extended position and a collapsed position, and leg lock means for locking the leg unit in the extended position and for allowing pivotable movement of the leg unit between the extended position and the collapsed position, wherein the leg lock means includes a pivotable latch pivotable about a latch pivot axis and coupled to one of the leg unit to latch to the plank end cap and the plank end cap to latch to the leg unit, and wherein, upon movement of the leg unit to the extended position, the leg pivot axis is arranged to lie between the second plank end portion and the latch pivot axis. 2. The scaffold of claim 1, wherein the latch is coupled to the leg unit at the latch pivot axis and arranged to pivot relative thereto between a latch position to latch to the plank end cap to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position and wherein the latch pivot axis cooperates with a top surface of the plank to define a space therebetween upon movement of the leg unit to the collapsed position and the leg pivot axis is arranged to lie in that space upon movement of the leg unit to the collapsed position.3. The scaffold of claim 2, wherein the leg lock means includes a latch pivoter located between the leg unit and the latch to pivot the latch from the release position to the latch position during movement of the leg unit from the collapsed position to the extended position.4. The scaffold of claim 3, wherein the latch pivoter is coupled to the plank end cap.5. The scaffold of claim 1, wherein the latch is coupled to the plank end cap at the latch pivot axis and arranged to pivot relative thereto between a latch position to latch to the leg unit to lock the leg unit in the extended position and a release position to release the leg unit to allow pivotable movement of the leg unit from the extended position to the collapsed position.6. The scaffold of claim 5, wherein the leg lock means includes a latch pivoter located between the plank end cap and the latch to pivot the latch from the release position to the latch position during movement of the leg unit from the collapsed position to the extended position.7. The scaffold of claim 6, wherein the latch pivoter is coupled to the leg unit.8. A scaffold comprisinga platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions, a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end cap to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the leg unit includes a pair of legs and a leg connector extending therebetween and the latch is coupled to the leg connector for pivotable movement and wherein the leg connector includes a leg attachment coupled to each leg and a first recessed portion positioned between the leg attachments and the latch is positioned within the recessed portion. 9. The scaffold of claim 8, wherein the first recessed portion includes an inclined wall, leg connector includes a second recessed portion recessed from the inclined wall, and further comprising a spring positioned within second recessed portion and extending therefrom into engagement with the latch.10. A scaffold comprisinga platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions, a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end cap to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the leg unit includes a pair of legs and a leg connector extending therebetween and the latch is coupled to the leg connector for pivotable movement and wherein the leg connector includes an upper wall, the plank end cap includes a lower wall, and the upper and lower walls are arranged to mate with one another when the leg unit assumes the extended position. 11. A scaffold comprisinga platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions, a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end cap to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the plank end cap includes a latch receiver, a latch pivoter, and a pivot blocker, the latch receiver is arranged to receive the latch upon pivotable movement of the leg unit to the extended position, the latch pivoter is arranged to pivot the latch away from the latch position for reception in the latch receiver upon pivotable movement of the leg unit to the extended position, and the pivot blocker is arranged to engage the latch to block pivotable movement of the leg unit away from the extended position. 12. A scaffold comprisinga platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions, a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end cap to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the plank end cap is formed to include a latch-receiving opening, a latch access opening, and a passageway extending between the latch-receiving opening and the latch access opening to define a latch-receiving cavity, the latch is arranged to enter and exit the latch-receiving cavity through the latch-receiving opening upon pivotable movement of the leg unit to and from the extended position, and the latch access opening provides means for admitting a force generator into the latch-receiving cavity while the latch extends into the latch-receiving cavity through the latch-receiving opening to allow application of a release force by the force generator to the latch to pivot the latch to the release position when the latch is positioned in the latch-receiving cavity. 13. The scaffold of claim 12, wherein the plank end cap includes an edge formed to include at least part of the latch-receiving opening and the edge is arranged to engage the latch to pivot the latch away from the latch position upon pivotable movement of the leg unit from the collapsed position to the extended position.14. The scaffold of claim 12, wherein the plank end cap includes a lower wall and an outer side wall inclined from the lower wall, the lower wall is formed to include the latch-receiving opening, and the outer side wall is formed to include the latch access opening.15. The scaffold of claim 14, wherein the plank end cap includes a pivot blocker positioned between the lower wall and the outer wall to engage the latch to block pivotable movement of the leg unit away from the extended position.16. A scaffold comprisinga platform including a plank end can and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions, a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end can to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the plank end cap includes a plank receiver and a latch receiver, the plank receiver receives the one of the plank end portions, and the latch receiver is positioned below the plank receiver and arranged to receive the latch upon pivotable movement of the leg unit to the extended position. 17. The scaffold of claim 16, wherein the plank receiver has a C-shaped cross-section.18. A scaffold comprisinga platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions, a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and a latch coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the plank end can to lock the leg unit in the extended position and a release position to release the plank end cap to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the plank end cap is formed to include a first wall extending over the one of the plank end portions, a second wall extending under the one of the plank end portions, and the one of the plank end portions is coupled to the second wall. 19. A scaffold comprisinga platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions, a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and a latch coupled to the plank end cap for pivotable movement relative thereto between a latch position to latch to the leg unit to lock the leg unit in the extended position and a release position to release the leg unit to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the latch includes a base coupled to the plank end can and a leg-engaging catch appended to the base and arranged to engage the leg unit upon movement of the leg unit to the extended position and wherein the leg-engaging catch is arranged to extend beyond an end of the plank during movement of the latch from the release position to the latch position. 20. The scaffold of claim 19, wherein the leg unit includes a latch pivoter located between the plank end cap and the latch to pivot the latch from the release position to the extended position during movement of the leg unit from the collapsed position to the extended position.21. The scaffold of claim 19, wherein the plank end cap is formed to include a recessed portion and the latch is positioned the recessed portion.22. The scaffold of claim 19, wherein the plank end cap includes at least a portion of a rim extending around at least a portion of the plank.23. A scaffold comprisinga platform including a plank end can and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end can being coupled to one of the plank end portions, a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and a latch coupled to the plank end cap for pivotable movement relative thereto between a latch position to latch to the leg unit to lock the leg unit in the extended position and a release position to release the leg unit to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the leg unit includes a pair of legs and a leg connector extending therebetween, the leg connector includes a latch receiver arranged to receive the latch upon pivotable movement of the leg unit to the extended position, a latch pivoter arranged to pivot the latch away from the latch position for reception in the latch receiver, and a pivot blocker arranged to engage the latch to block pivotable movement of the leg unit away from the extended position. 24. The scaffold of claim 23, wherein the leg connector includes an upper wall, the plank end cap includes a lower wall, the upper and lower walls are arranged to mate with one another when the leg unit assumes the extended position, and the upper wall provides at least a portion of the latch pivoter.25. A scaffold comprisinga platform including a plank end cap and a plank to support a person thereon, the plank being elongated so as to include opposite plank end portions, the plank end cap being coupled to one of the plank end portions, a leg unit coupled to the platform for pivotable movement relative thereto between an extended position and a collapsed position, and a latch coupled to the plank end can for pivotable movement relative thereto between a latch position to latch to the leg unit to lock the leg unit in the extended position and a release position to release the leg unit to allow pivotable movement of the leg unit from the extended position to the collapsed position, wherein the leg unit includes a pair of legs and a leg connector extending therebetween, the leg connector includes a recessed portion, and the latch is positioned within the recessed portion. 26. A scaffold comprisinga platform to support a person thereon, the platform being elongated so as to include opposite platform end portions, a leg unit pivotable about a leg pivot axis and coupled to a first of the platform end portions for pivotable movement relative to the platform between an extended position and a collapsed position, and a latch pivotable about a latch pivot axis and coupled to the leg unit for pivotable movement relative thereto between a latch position to latch to the first platform the end portion to lock the leg unit in the extended position and a release position to release the first platform end portion to allow pivotable movement of the leg unit from the extended position to the collapsed position wherein the latch pivot axis is spaced from the leg pivot axis and moves with respect to the leg pivot axis when the leg unit moves between the extended position and collapsed position. 27. The scaffold of claim 26, wherein the platform has a longitudinal axis and the latch is pivotable about a latch pivot axis that is perpendicular to the longitudinal axis of the platform.