| 摘要 |
The invention relates to a structural unit for making playhouses and mazes in play areas, each unit comprising a rigid rectilinear frame which, when positioned on a flat surface in a vertical plane, has a pivoting means at a first end of its lower side and a castor at the other end of the latter so that it can be pivoted about a vertical axis; each side of the frame having a panel attached thereto by a Jacobs-ladder type of double hinge so that each of the two panels may be pivoted to either side of the frame. On the upper side of the frame opposite the pivoting means, provision is made for attaching a pole or pipe which can be supported from above to hold the frame in a vertical plane. Preferably three or four such units are combined and the supporting poles or pipes are held in position by a removable roof.
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