Lever lock post holder
A post holder for holding a post in place. The post holder includes: a casing including a hollow cylinder and a clamping flag defined by a cutout formed in the hollow cylinder; first and second brackets detachably secured to the casing; a cylindrical rod disposed between the first and second brackets and secured to the first and second brackets; and a levered cam disposed between the first and second brackets and having a shape of a comma that includes a tail and a circular disk. The circular disk has a hole that the cylindrical rod passes through, where the hole is offset from a center of the circular disk so that a level of a clamping force that the circular disk applies to the clamping flag changes as the levered cam rotates relative to the casing.
1. A post holder, comprising:
a casing including a hollow cylinder and a clamping flag defined by a cutout formed in the hollow cylinder;
first and second brackets detachably secured to the casing;
a cylindrical rod disposed between the first and second brackets and secured to the first and second brackets; and
a levered cam disposed between the first and second brackets and having a shape of a comma that includes a tail and a circular disk, the circular disk having a hole that the cylindrical rod passes through, the hole being offset from a center of the circular disk so that a level of a clamping force that the circular disk applies to the clamping flag changes as the levered cam rotates relative to the casing.
2. The post holder of claim 1 , wherein the cutout includes a first slit that extends along a circumferential direction of the hollow cylinder, a second slit that is parallel to the first slit, and a third slit that extends along a longitudinal direction of the hollow cylinder and wherein the third slit has two ends that meet the first and second slits, respectively.
3. The post holder of claim 1 , wherein the clamping flag bends inward in response to the clamping force, to thereby hold a post received in the hollow cylinder in place.
4. The post holder of claim 1 , wherein a thickness of the clamping flag in a radial direction of the hollow cylinder is less than a thickness of the hollow cylinder in the radial direction.
5. The post holder of claim 1 , wherein the clamping flag has a groove that extends along a longitudinal direction of the hollow cylinder and wherein the clamping flag pivots around the groove in response to the clamping force.
6. The post holder of claim 1 , further comprising:
a bottom plug detachably secured to the casing and including a tapped hole.
7. The post holder of claim 1 , wherein the bottom plug further includes a pair of holes for a spanner drive.
8. The post holder of claim 1 , wherein the clamping flag is carved out to form a rubbing surface and wherein the rubbing surface is concave inward so as to conform to a side surface of the levered cam.
9. The post holder of claim 1 , further comprising:
a first anti friction disk disposed between the levered cam and the first bracket; and
a second anti friction disk disposed between the levered cam and the second bracket.
10. The post holder of claim 1 , wherein the first bracket includes:
a top portion detachably secured to the casing and having a first groove; and
a bottom portion detachably secure to the top portion and having a second groove,
wherein the first and second grooves form a circular hole for receiving the cylindrical rod therein.
11. The post holder of claim 1 , further comprising:
an adjustable friction assembly for applying a frictional force to a post received in the hollow cylinder, the adjustable friction assembly comprising:
a main body detachably secured to the casing and having a through hole extending in a radial direction of the hollow cylinder;
a ball disposed in the through hole;
a spring disposed in the through hole and configured to push the ball in the radial direction so that the ball applies the frictional force; and
a jam nut detachably secured to the main body and having a tip that compresses the spring.
12. The post holder of claim 11 , wherein the adjustable friction assembly further comprises:
a screw detachably secured to the main body and having a tip that secures the jam nut to the main body.
13. The post holder of claim 11 , wherein the adjustable friction assembly further includes:
a spacer disposed between the casing and the main body and having a curved surface that conforms to an outer surface of the casing.
14. The post holder of claim 11 , wherein main body further includes a pair of holes for a spanner drive.
15. A post holder for holding a post, comprising:
a casing including a hollow cylinder for receiving a post therein and having a tapped hole; and
an adjustable friction assembly for applying a frictional force to the post, the adjustable friction assembly comprising:
a main body engaging the tapped hole in the casing and having a through hole extending in a radial direction of the hollow cylinder;
a ball disposed in the through hole;
a spring disposed in the through hole and configured to push the ball in the radial direction so that the ball applies the frictional force; and
a jam nut detachably secured to the main body and having a tip that compresses the spring.
16. The post holder of claim 15 , wherein the main body further includes a tapped hole and wherein the adjustable friction assembly further comprises:
a screw engaging the tapped hole in the main body and having a tip that secures the jam nut to the main body.
17. The post holder of claim 15 , wherein the adjustable friction assembly further includes:
a spacer disposed between the casing and the main body and having a curved surface that conforms to an outer surface of the casing.