| 摘要 |
<p>The lower structure of the mould comprises an intermediate beam (26) freely borne by the frame (83) whose upper surface opposite the surface resting on the frame (3) carries the lower spacer (4) which is mounted by clamps (37) onto the beam (26). At least one positioning rod (54) is engaged in a housing (55) in the front part of the frame (3). A plurality of means (47) for holding the intermediate beam (26) on the frame are distributed according to the length of the beam (26). These means each comprise a part (46) which can be longitudinally engaged in a gripping device (45) connected to the beam (26) whereby said part can be driven in order to hold the beam (26) on the frame (3) or, on the contrary, to free it. The device finally comprises a means for shifting the intermediate beam (26) in relation to the frame (3) in the longitudinal direction over a sufficient distance so as to engage or disengage the rod (54) from the housing (55) and the engaging parts (46) of the holding means (47) from the corresponding gripping devices (45).</p> |
