Inventio Ag

Rolf M&uuml;ller

Hanspeter Bloch

An elevator installation with hoistway doors has door panels that can be laterally displaced beyond the width of the hoistway, and/or they can be at least partially displaced into the hoistway wall resulting in an elevator installation with improved utilization of building space, which also requires less effort to install. The door frame of the hoistway door assembly is transformed into a flat, wide hoistway wall module with integral hoistway doors such that building space hitherto required in the hoistway by the hoistway wall is reduced. The hoistway wall module is either inserted between the landing floors, or else several such hoistway wall modules are fitted together vertically and form a largely freestanding modular hoistway wall which forms between the elevator installation and the building an interface which is either self-supporting or supported individually on each floor.

Elevator installation with hoistway doors

A maintenance trestle is stowable in folded-together form in the hatch cover of an elevator car. The maintenance trestle is erected by tilting the hatch cover into the car interior about a first fulcrum. The maintenance trestle is now accessible in folded-together form and includes transverse connectors. Several supports arranged in the car walls are pivotable into the car and are engaged by the transverse connectors. The transverse connectors carry plates forming a platform for supporting a person. Stays for stabilizing the maintenance trestle diagonally extend between the supports and the car floor.

Equipment for carrying out operations in an elevator shaft

A maintenance trestle is stowed in folded-together form below the floor of an elevator car. The maintenance trestle is erected by tilting the floor up towards the car wall about a first fulcrum. The maintenance trestle includes a platform hinged to at least one fastening point on the bottom side of the tilted-up floor and at least one support hinged to the platform at a fulcrum opposite the fastening point and engaging the elevator car. The floor and the support position the platform in an extended position wherein a person standing on the platform can reach through a hatch in the car ceiling to work in the elevator shaft. A stay for stabilizing the maintenance trestle can extend between the fulcrum on the platform and another fulcrum on the car.

A maintenance trestle is stowable in folded-together form in the floor of an elevator car and has a platform forming the floor. The platform is steplessly adjustable in height between a stored position and an erected position by lifting equipment operating on the scissors principle. Buttons on a car panel that normally control car operations, such as opening and closing doors, can be converted to controlling the extension and retraction of the platform.

Growing community of inventors

Shizuoka, Japan

Rolf Müller

Growing community of inventors

Shizuoka, Japan

Rolf M&uuml;ller

Rolf Müller