| 摘要 |
A wooden pole or standard for power lines or the like comprises a number of staves (2) having trapezoidal cross-section with side faces forming a mutual angle of 360/n degrees, n being the number of staves in the pole, and which staves are glued together along adjacent side faces so that a pole (1) having a centrally extending hollow space is formed. All staves (2) are equally shaped lamellae in a number which, for the cross-sectional dimension in question, is sufficiently large to achieve a laminated structure in the circumferential direction of the pole, and the individual lamellae are, as required, finger jointed for achieving the desired pole length. A machine for manufacturing staves for such a wooden pole comprises a milling device consisting of a pair of milling spindle holders (14a, 15a) arranged on respective sides of a feeding means (17) for stave blanks (11), and which are angularly adjustable and have milling tools (12, 13) for shaping of opposite side faces of the stave blanks. One of the spindle holders (15a) may, during feeding of a stave blank (11), be moved outwards and away from the other spindle holder (14a) with a speed which is related to the feeding speed of the stave blanks (11). The movement of the spindle holder (15a) is started and stopped automatically by means which are actuated by the forward and rearward end, respectively, of a stave blank (11), and the spindle holder (15a) is returned automatically to the initial position by stop of said movement. |
