| 摘要 |
PROBLEM TO BE SOLVED: To provide a braking and locking mechanism that enables applying the brakes and also locking in the vertical telescopic motion of the vertically extending telescopic strut.SOLUTION: A vertically extending telescopic strut comprises a support tube 11, a connection part 20 at the upper end thereof, and a telescopic rod 15 stored in the inside of these. The connection part 20 comprises a cylindrical body part 21 and a sliding cylindrical member 22 vertically sliding on the outer circumference. The cylindrical body part 21 includes a stopper ball appearing/disappearing in the radial direction. An elastic member is interposed between the sliding cylindrical member 22 and the cylindrical body part 21, and always biases upward the sliding cylindrical member 22 and presses the stopper ball in the shaft core direction. An annular groove part 16 provided at the telescopic rod 15 can be matched, and the telescopic rod 15 is fixed to the cylindrical body part 21. When the sliding cylindrical member 22 is shifted downward, the stopper ball is matched with a diameter size part of the sliding cylindrical member 22 and is shifted outward, the matching of both is released, and the fixing is released. An upper end part in the cylindrical body part 21 of the connection part 20 is separated from the upper end part of the sliding cylindrical member 22. An elastic body is provided at the lower end part of the telescopic rod 15, and this elastic body presses and biases an inner wall surface of the support tube 11. |
