| 摘要 |
A tool support device includes a longitudinal beam having a longitudinal rod, a longitudinal rib extended from the longitudinal rod, a coupler having a barrel slidably and rotatably engaged onto the longitudinal rod and rotatable relative to the longitudinal rod to selected angular position. The barrel includes a depression and a number of cavities communicating with the bore, to slidably receive the longitudinal rib, and to limit the barrel to rotate relative to the longitudinal rod, and to retain the longitudinal rib in either of the cavities of the barrel, and to position the barrel relative to the longitudinal rod at selected angular position.
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