Retractable column and method of forming
The present invention is an improved apparatus and method for forming a retractable tower or column. The present invention includes pointed hooks wherein the hooks are attached to each section of a section chain, one in a horizontal direction and one in an off-set manner. The section chains are placed on a take up mechanism in an operable position and then raised utilizing a motor. As the section chains are raised, they are guided by a guide tower, rollers, shims, and gear racks into a position whereby hooks from adjacent sections of the section chains form coupled engagements. The coupled engagement of the hooks of the sections of each adjacent section chains thereby form the column.
1. A retractable column comprising:
three articulated sections arranged so as to be able to be brought together to form sides of the column, each section having a plurality of links pivotally connected to each other in an end-to-end manner;
a first connection member extending in a first direction from each link wherein each first connection member comprises a curved body with a tapered tip, with the curved body extending from the connection member at an oblique angle relative to a plane defined by the link;
a second connection member extending in a second direction from each link, wherein the first connection member of a first link is configured and arranged to releasably engage the second connection member of an adjacent link as the sections are extended in a generally vertical direction to form the column;
a drive mechanism positioned to operably engage each of the three sections and extend them in the generally vertical direction;
a first inner guide tower positioned between the three sections to help guide the first and second connection members of adjacent links into engagement with each other;
a second outer guide tower positioned so as to be able to retain the engaged sections in operable engagement with the drive mechanism.
2. The retractable column of claim 1 , wherein each link of each section is generally planar.
3. The retractable column of claim 1 , wherein the oblique angle is approximately 30 degrees.
4. The retractable column of claim 1 , wherein the tapered tip includes a generally planar surface that intersects an exterior surface of the curved body at an acute angle.
5. The retractable column of claim 1 , wherein the curved body and the tapered tip define an outwardly expanding gap.
6. The retractable column of claim 1 , wherein the first connection member further comprises a generally cylindrically-shaped rod and a radially extending shoulder, with the shoulder adjacent said curved body.
7. The retractable column of claim 1 , wherein the second connection member comprises a curved body, with the curved body extending from the connection member within the plane defined by the link.
8. The retractable column of claim 1 , wherein the second outer guide tower comprises one or more rollers that operatively engage one or more of the sections.
9. The retractable column of claim 1 , wherein at least one of the three sections is connected to a take-up mechanism, and wherein the take-up mechanism is supported by at least one track, with the track slanted upwardly and outwardly relative to the first inner guide tower.
10. An extendable and retractable multi-sided column comprising:
a plurality of articulated sections arranged so as to be able to be brought together to form sides of the column, each section having a plurality of links pivotally connected to each other in an end-to-end manner;
a first connection member extending in a first direction from each link wherein each first connection member comprises a curved body with a tapered tip, with the curved body extending from the connection member at an oblique angle relative to a plane defined by the link;
a second connection member extending in a second direction from each link, wherein the first connection member of a first section link is configured and arranged to engage the second connection member of an adjacent section link as the sections are extended in a generally vertical direction to form the column;
a drive mechanism positioned to operably engage each of the sections and selectively extend and retract them in the generally vertical direction;
a first inner guide tower positioned in a generally central location between the sections, the inner guide tower configured to guide each of the sections as they are extended in the generally vertical direction so that the first and second connection members of adjacent links are able to be brought into engagement with each other;
a second, outer guide tower positioned so as to be able to prevent engaged sections from coming out of operable engagement with the drive mechanism.
11. The extendable and retractable multi-sided column of claim 10 , wherein each section is connected to a take-up mechanism, and wherein each take-up mechanism is supported by a pair of tracks, with each pair of tracks slanted upwardly and outwardly relative to the first inner guide tower.
12. The extendable and retractable multi-sided column of claim 11 , wherein each take-up mechanism includes a rod with rollers at each end, and wherein each track comprises an upwardly opening channel configured and arranged to receive a respective roller of the take-up mechanism.
13. The extendable and retractable multi-sided column of claim 10 , wherein each link of each section comprises a pair of vertical struts, with each strut including a blade at one end and a saddle at the other end, with the blades of one link configured to be pivotally connected to the saddles of an adjacent link.
14. The extendable and retractable multi-sided column of claim 13 , wherein each blade of a strut is removably connected to said strut.
15. The extendable and retractable multi-sided column of claim 13 , wherein each saddle of a strut is integrally formed with said strut.
16. The extendable and retractable multi-sided column of claim 15 , wherein each saddle comprises a pair of substantially parallel plates.
17. The extendable and retractable multi-sided column of claim 14 , wherein said strut includes an end with a longitudinally extending cavity, and wherein the blade includes an attachment portion that is received by said cavity.
18. The extendable and retractable multi-sided column of claim 17 , wherein the blade is secured to the strut by at least one transverse pin that extends through apertures in both the strut and the blade.
19. The extendable and retractable multi-sided column of claim 10 , wherein each link of a section comprises a vertical strut having a length and a drive mechanism engagement member having a length, wherein the drive mechanism engagement member is connected to the vertical strut, and wherein the length of the drive mechanism engagement member is greater than the length of the strut.
20. The extendable and retractable multi-sided column of claim 19 , wherein the drive mechanism engagement member is a gear rack.
21. The extendable and retractable multi-sided column of claim 10 , wherein each link of a section comprises a left vertical strut, a right vertical strut and a drive mechanism engagement member, wherein the drive mechanism engagement member is connected to either the left vertical struts of all the links or the right vertical struts of all of the links.