| 摘要 |
PROBLEM TO BE SOLVED: To provide especially a coupling device, in a planted tree stabilizer to be used to stably hold the planted tree when tree planting, connecting with each other a plurality of planted tree stabilizer adjacently arranged on an almost horizontal surface in order to respond to a demand of roof greening. SOLUTION: This coupling device is a device that, in the planted tree stabilizer with arms extending from a seat part positioned almost in the center of the bottom of root ball of a tree in the radial direction, a plurality of planted tree stabilizers adjacent to each other are freely detachably connected with each other in a condition of adjacently arranging the planted tree stabilizers on an almost horizontal surface. The coupling device has a connection angle adjusting means for freely mutually rotating the planted tree stabilizers adjacent to each other on an almost horizontal surface. COPYRIGHT: (C)2005,JPO&NCIPI
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