| 摘要 |
PROBLEM TO BE SOLVED: To provide a link type lifting mechanism which improves workability and maintenance by enabling an ascending operation of a lifting portion without driving means and can prevent pinching by driving means during descending of the lifting portion.SOLUTION: In a link type lifting mechanism (1) has an X-shaped link mechanism (30) consisting of a first link (31) and a second link (32) connected together between a stem (10) and a lifting portion (20), there are provided a third link (40) and a linear motion actuator (50) for driving the third link (40) between the stem (10) and the lifting portion (20). The third link (40) is configured by connecting one end side rotatably to the lifting portion (20) and arranging the other end side so as to be approachable to and separable from the first link (31) and so that the other end side comes into contact with the first link (31) by the linear motion actuator (50) to urge the lifting portion (20) only in the ascending direction. |
