| 摘要 |
A guide rail for supporting the guide rollers of tenter clamps, in a tentering machine such as a film stretching machine, includes a plurality of spring steel bands clamped to a support member of the tentering machine by a clamping block and clamping bolt. To ensure that the guide rollers remain constantly in contact with the guide rail, the guide rail is elastically yieldable in the thickness direction to compensate for any tolerances or deviations in the arrangement or running operation of the guide rollers. At least one of the spring steel bands of the guide rail is spring-elastically deflectable in a thickness direction perpendicular to the lengthwise extension of the guide rail. In one embodiment, at least one of the spring steel bands is pre-curved to provide the necessary elastic spring characteristic. In another embodiment, a spacer member is arranged between initially flat spring steel bands to leave elastically deflectable free edge portions of the steel bands protruding beyond the spacer member and the clamping members. The guide rollers are mounted on the guide rail so as to partially pre-stress the elastically deflectable steel bands in the thickness direction.
|
