Replacement for four-leaf folding landing doors in situ

The power-actuated Meiller folding landing door “Sinius” now also meets the requirements of the fire protection standard EN 81-58 E60. Sinius was developed for the 1:1 modernisation of existing four-leaf door systems in situ.

Numerous landing doors are still in use today in industrial lifts that were installed in the 1980s and 1990s, especially in the chemical and automobile sectors. These are four-leaf, power-actuated folding doors of two manufacturers, which have now been absorbed in group structures and no longer offer these door types.

In recent years, there have been calls both by operators as well as by planning offices for a suitable replacement since the existing lifts are regarded as liable to break down and no longer compatible with safety and comfort requirements. Replacement by hinged doors or vertically-opening alternatives has failed in many locations due to structural or functional limitations.

Solution: modernisation without structural changes

Photo: © Meiller Aufzugtüren

Meiller developed the Sinius door against this background: a four-leaf, power-actuated folding landing door, which is especially designed to precisely map the construction space of the original lifts. The goal was to facilitate the replacement without structural intervention. All relevant safety-related requirements must be met at the same time.

Although EN 81-20/50 does not explicitly deal with power-actuated folding landing doors, the following limits also apply here according to the state-of-the-art:
• 150 Nm impact force
• 10 J closing energy
• 4 J thrust energy.

These requirements were monitored and tested from the start by TÜV Süd.

New: now also fire-tested

Thanks to the current test according to EN 81-58 E60, Sinius now also meets the criteria for applications with enhanced fire protection. As a result, the area of use has greatly expanded, for example in sensitive industrial sectors or openly accessible lifts where certified fire protection is required.

"Particularly in existing industrial lifts, it is decisive that safety and economic efficiency can be combined," emphasised Florian Runck, product manager at Meiller Aufzugtüren.

Technical features

New threshold mounting brackets and new transom and frame mounting angles for lighter, more flexible, and more stable installation options. Photo: © Meiller Aufzugtüren

Sinius is available in clearance widths from 2,000 to 4,000 mm and heights of 2,000 to 3,000 mm. The door is IP 54-certified, is issued powder-coated as standard and designed for maximum sturdiness. Functionality normally remains guaranteed even in the case of mechanical effects, such as dented door leaves. Damaged leaves can be replaced with little effort.

The door sides are each driven by their own motor. The controller uses a system from the Meiller MiDrive series. The door is suitable both for lifts without car doors as well as for combinations with the car rollup door Genius Plus I.

The door sill is cast on site. If damage occurs, the sill guide elements can be replaced without any problems.

Typical areas of use

Sinius was developed for the modernisation of existing folding landing doors, but are equally suitable for new lifts in the heavy load area, especially where structural changes are to be avoided.

More informations: https://www.meiller-aufzugtueren.de/en

For more information about Meiller Aufzugtüren, see the online articles ‘The hinged door in lift building: an underestimated classic’ and ‘Three questions to … Christian Dreßler’ at lift-journal.com.