| 摘要 |
A roller board is provided, which enables a user to maintain easily a valance and to convert easily a direction even in a narrow space by adding a twisted rotating and horizontal rotating function of a front and rear board to a connection element to connect the front and rear board. The roller board includes boards(100a,100b), fixing frames(310a,310b) fixed to the bottom of the boards, arms(320a,320b) supporting rollers(330a,330b) and rotatably connected to the fixing frames, bolts(340a,340b) and nuts(360a,360b) for fastening the arms and fixing frames, and a brake unit for generating braking power by arresting rotation of the rollers. The brake unit comprises a brake shaft(440) that ascends and descends with respect to the arms and a pressure part for pressing the rollers through the brake shaft.
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