1. A retention structure for incorporating with an existing foldable furniture having two folding legs pivotally coupled via a pivot shaft, wherein said retention structure comprises:
a left retention coupler which comprises a first tubular portion adapted for coupling with one of said folding legs, a first through hole provided transversely, and two left retention members protruding sidewardly;
a right retention coupler which comprises a second tubular portion adapted for coupling with another folding leg, a second through hole provided transversely, and two right retention members protruding sidewardly;
wherein said two left retention members are spacedly and integrally protruded at an outer circumferential edge of said left retention coupler toward said right retention coupler, wherein said two right retention members are spacedly and integrally protruded at an outer circumferential edge of said right retention coupler toward said left retention coupler, wherein said left and right retention couplers are coupled with each other at a position that said first and second through holes are coaxially aligned for said pivot shaft slidably passing therethrough to enable said folding legs being folded in a pivotally movable manner and to retain said left and right retention couplers in position, wherein said left and right retention couplers are driven to coaxially rotated until one of said left retention members is biased against one of said right retention members for retaining said foldable furniture at a folded position when said folding legs are pivotally moved to move said foldable furniture at said folded position, wherein said left and right retention couplers are driven to coaxially rotated at an opposite direction until another left retention member of said left retention members is biased against another right retention member of said right retention members for retaining said foldable furniture at an unfolded position when said folding legs are pivotally moved to move said foldable furniture at said unfolded position.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A shake jig for assisting with installation of shakes, the shake jig comprising:
a base member supporting an adjustable member and a releasably fastener facilitating releaseable retention of the adjustable member in a desired relative position with respect to the base member;
the base member having a shake shelf for abutting against a surface of a shake to prevent further insertion of the base member, between an installed topmost shake and an at least partially overlapped shake, and facilitate desired alignment of the shake jig with respect to the installed topmost shake; and
the adjustable member having a ledger shelf for engaging with a ledger board and retaining the ledger board in a desired horizontal orientation with respect to the shake shelf and assisting with installation of shakes.
2. The shake jig according to claim 1, wherein a first leading section of the base member is L-shaped and comprises an elongate clamping leg which has a slight bend or camber along its length, and an opposite end of the clamping leg supports the shake shelf.
3. The shake jig according to claim 1, wherein the shake shelf extends substantially at a right angle to the clamping leg of the shake jig.
4. The shake jig according to claim 1, wherein at least one protrusion or gripping feature is formed on an outwardly facing surface of the clamping leg, adjacent a leading end thereof to facilitate retention of the shake jig following insertion of the clamping leg between the installed topmost shake and the at least partially overlapped shake.
5. The shake jig according to claim 1, wherein a plurality of protrusions or gripping features are formed on an outwardly facing surface of the clamping leg, adjacent a leading end thereof, to facilitate retention of the shake jig following insertion of the clamping leg between the installed topmost shake and the at least partially overlapped shake.
6. The shake jig according to claim 1, wherein a section of the support leg has at least one guide feature and the adjustable member has at least one mating guide feature which cooperate with one another and assists with guiding movement of the adjustable member along the support leg such that a longitudinal axis of the adjustable member remains substantially aligned and parallel with a longitudinal axis of the support leg and the ledger shelf remains substantially parallel to the shake shelf.
7. The shake jig according to claim 1, wherein at least one lateral side of the adjustable member partially wraps around a lateral side of the support leg to assist with guiding the adjustable member along the support leg such that a longitudinal axis of the adjustable member remains substantially aligned and parallel with a longitudinal axis of the support leg and the ledger shelf remains substantially parallel to the shake shelf.
8. The shake jig according to claim 1, wherein a surface of the support leg is provided with a scale and the adjustable member carries a pointer, and the point cooperates with the scale to display a relative position of the ledger shelf with respect to the shake shelf.
9. The shake jig according to claim 8, wherein when the point points to a \u201c0\u201d position of the scale, this position indicates that the shake shelf and the ledger shelf are aligned with one another
10. The shake jig according to claim 1, wherein a leading end of the adjustable member curves away from the clamping leg and to form a gripping surface for a finger of an installer to facilitate insertion of a ledger board on the ledger shelf and assist with adjusting a relative position between the adjustable member and the base member.
11. A system for installing shakes on a building, the system comprising:
a ledger board;
a shake jig for assisting with installation of shakes, the shake jig comprising:
a base member supporting an adjustable member and a releasably fastener facilitating releaseable retention of the adjustable member in a desired relative position with respect to the base member;
the base member having a shake shelf for abutting against a surface of a shake to prevent further insertion of the base member, between an installed topmost shake and an at least partially overlapped shake, and facilitate desired alignment of the shake jig with respect to the installed topmost shake; and
the adjustable member having a ledger shelf for engaging with the ledger board and retaining the ledger board in a desired horizontal orientation with respect to the shake shelf and assisting with installation of shakes.
12. The shake jig according to claim 11, wherein a first leading section of the base member is L-shaped and comprises an elongate clamping leg which has a slight bend or camber along its length, and an opposite end of the clamping leg supports the shake shelf.
13. The shake jig according to claim 11, wherein the shake shelf extends substantially at a right angle to the clamping leg of the shake jig.
14. The shake jig according to claim 11, wherein at least one protrusion or gripping feature is formed on an outwardly facing surface of the clamping leg, adjacent a leading end thereof, to facilitate retention of the shake jig following insertion of the clamping leg between the installed topmost shake and the at least partially overlapped shake.
15. The shake jig according to claim 11, wherein a plurality of protrusions or gripping features are formed on an outwardly facing surface of the clamping leg, adjacent a leading end thereof to facilitate retention of the shake jig following insertion of the clamping leg between the installed topmost shake and the at least partially overlapped shake.
16. The shake jig according to claim 11, wherein a section of the support leg has at least one guide feature and the adjustable member has at least one mating guide feature which cooperate with one another and assists with guiding movement of the adjustable member along the support leg such that a longitudinal axis of the adjustable member remains substantially aligned and parallel with a longitudinal axis of the support leg and the ledger shelf remains substantially parallel to the shake shelf.
17. The shake jig according to claim 11, wherein at least one lateral side of the adjustable member partially wraps around a lateral side of the support leg to assist with guiding the adjustable member along the support leg such that a longitudinal axis of the adjustable member remains substantially aligned and parallel with a longitudinal axis of the support leg and the ledger shelf remains substantially parallel to the shake shelf.
18. The shake jig according to claim 11, wherein a surface of the support leg is provided with a scale and the adjustable member carries a pointer, and the point cooperates with the scale to display a relative position of the ledger shelf with respect to the shake shelf.
19. The shake jig according to claim 18, wherein when the point points to a \u201c0\u201d position of the scale, this position indicates that the shake shelf and the ledger shelf are aligned with one another.
20. A method of installing shakes to a building via a ledger board and first and second shake jigs with each of the first and the second shake jigs comprising a base member supporting an adjustable member and a releasably fastener for facilitating releaseable retention of the adjustable member in a desired relative position with respect to the base member; the base member having a shake shelf for abutting against a surface of a shake to prevent further insertion of the base member, between an installed topmost shake and an at least partially overlapped shake, and facilitate desired alignment of the shake jig with respect to the installed topmost shake; and the adjustable member having a ledger shelf for engaging with the ledger board and retaining the ledger board in a desired horizontal orientation with respect to the shake shelf and assisting with installation of shakes, the method comprising the steps of:
inserting a leading end of the first shake jig between an installed topmost shake and an at least partially overlapped shake;
inserting a leading end of the second shake jig between another installed topmost shake and another at least partially overlapped shake such that the first shake jig is spaced from the second shake jig;
supporting the ledger board on the ledger shelf of each of the first and the second shake jigs;
arranging shakes to be installed on a top surface of the ledger board; and
securing the shakes, arranged on the top surface of the ledger board, to the building.