| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for fixing a relative position of a conventional plant protecting material composed of a base frame and an upper frame. SOLUTION: This plant protecting material which is to be laid on a foundation and composed of a base frame and an upper frame is such that a base frame side part is set with connection parts which are connectable with each other. The base frame is composed of base tread parts and base through-hole parts, the base tread parts stand in a projecting form and are connected with each other, and the base through-hole part is a hole part surrounded by the base tread parts, the upper frame is not set with connection parts of the upper frames. The base frame is composed of an upper tread part and an upper through-hole part, and part of the upper tread part is set corresponding in 1:1 positional relation with the base tread part. When the upper tread part is placed on the base tread part, at least either the upper tread part or the base tread part has an engaging tool which prevents the position of the upper tread part from lowering. In the case of combinedly using the base frame and the upper frame, an engagement tool which keeps their upper and lower relative positions is set. COPYRIGHT: (C)2010,JPO&INPIT |
