| 摘要 |
The marker base comprises a baseplate and an insert part (22), for example in the form of a base body. The insert part (22) is received by means of a holder of the baseplate, which has two diametrically disposed groove-and-tongue connections (31). Its grooves (32) are arranged on an insert (25) of the baseplate. The tongues (33) are arranged on an insert shoe (34) into which a shank part of the insert part is inserted and guided in a rotatable manner therein. The shank part projects downwards out of the insert shoe (34). A securing pin (42) is inserted into a transverse through-hole in this longitudinal section. It has length greater than the width of the insert shoe (34) and of the insert (25). The opening in the insert (25) for the insert shoe (34) has a length greater than the length of the securing pin (42). Provided at the lower edge of the transverse walls of the insert (25) in the swivel plane of the securing pin (42) are two first recesses. Each of these are adjoined by a respective second recess arranged in the transverse direction of the insert (25) and closed off at the top. The inset part (22), with the longitudinally oriented securing pin (42) together with the insert shoe (34), is inserted into the insert (25) until the securing pin (42) is at the level of the first recesses. Then, the insert part (22) is turned through 90 DEG , so that the securing pin (42) is swivelled into the first recesses until it is in vertical alignment with the second recesses. If the insert part (22) is run over and the springs (33) on the insert shoe (34) are sheared off at the same time, the insert part (22) is raised. Moreover, the securing pin (42) is drawn into the second recesses, as a result of which the insert part (22) is secured on the baseplate. <IMAGE> |
