| 摘要 |
The invention concerns a tool-ejection mechanism on a drilling machine 1 or similar of the type which has a drill spindle 5, 105 with an ejection mechanism 15, 115 which, during the ejection stage, combines by impact with the upper section 11A, 111A of the tool 11, 111; also there is a locking device 4, 104 which, during normal machine operation, is designed to prevent the position being reached where the said impact combination occurs. The locking device 4, 104 is therefore movable between a first and a second end position where the said impact combination occurs and the tool can be removed, or the said impact combination can be prevented, so that the tool is held by the drill spindle 5, 105 even in its raised position. The said mechanism is fitted with a locking device 4, 104 which is automatically released after tool ejection so that the locking device 4, 104 is prevented from accidentally remaining in its released state even when the drill spindle 5, 105 is raised, whereby the tool would be accidentally released with all the consequent damage. The locking device 4, 104 is spring-operated in the direction of the said second end position, and there is a blocking device 8, 108, which is spring-loaded in the direction of its activated position in which it holds the locking device 4, 104 in its said first position, whereby the blocking device 8, 108 can be released by the drill spindle 5, 105 when it is raised, so that the locking device 4, 104 takes up the said second position when the drill spindle 5, 105 is brought down again. <IMAGE> |
