BOM, PETRUS LEONARDUS JOZEF,VAN STEEKELENBURG, PAULUS WILHELMUS JOZEF
申请号：
EP20040075414
公开号：
EP1459621(A2)
申请日:
2004.02.09
申请国别(地区):
欧洲专利局
年份:
2004
代理人:
摘要：
A glasshouse or greenhouse comprises a framework composed of columns (1), parallel trusses (2) which are supported by the columns (1), caps (3) which are each supported between two gutters (4) extending transversely across the trusses (2), and a screen installation, which screen installation comprises screen profiled sections (8), screen cloths (40), which are each secured at one end to a truss (2) and at the other end to a screen profiled section (8), slip elements (11) and drive members (9), which drive members (9) are secured, by means of a slip element (11), to a screen profiled section (8) for moving the screen cloths (40) between a closed position, in which the space between each pair of trusses (2) is closed off, and an open position, which slip elements (11) each comprise a spring member (14) for causing each slip element (11) to engage under spring pre-stress on the associated drive member (9) in order to create a predetermined slip force between slip element (11) and drive member (9). The screen profiled sections (8) are displaceable with respect to the slip elements (11) in the longitudinal direction of the drive members (9). Furthermore, there is a pre-stressing means (32) for biasing the screen profiled section (8) into a predetermined position with respect to the slip elements (11) in such a manner that the pre-stressing means (32) provides a pre-stressing force which is lower than the slip force.
