| 摘要 |
FIELD: agricultural industry. ^ SUBSTANCE: short-length logging method includes cutting of tree branches in a bottom-upward direction, and then cutting of assortments from top downwards along the trunk to its bottom log by means of a claw-like felling unit of a felling-and-bunching machine. When cutting the assortments, the claw-like felling unit stop is put on the tree end surface, and then the claw-like felling unit is lowered down thus measuring the assortment length; after that the trunk is grasped and assortment is cut down. Then short-length logging cycle is repeated till the claw-like felling unit reaches the ground, and at the end of the cycle a non-sized bottom log is cut down. Working member of short-length logging machine consists of a claw-like felling unit of felling-and-bunching machine with a column. At the column top there installed is a cover with a hole wherein arranged is a movable column with a locking device installed on its lower end. Locking device is located inside the column so that it can move up to the cover. On the upper end of movable column there provided are two pairs of holes meant for attaching a detachable stop for example with bolts. On the sides of movable column there are two marks made in 300 mm for measuring the length of a log per one meter. ^ EFFECT: improving the output of useful assortments when preparing dimension assortments in a growing or mature birch forest. ^ 5 cl, 10 dwg |
