Alimak is a world leading company in construction-material-and industrial hoists as well as mast climbers and transport platforms. The product they deliver can be both permanent and temporary. Today’s market is constantly demanding that these products are developed continuously. Urbanization, sustainability, and stricter workplace safety regulations are the foremost driver of market growth.
The purpose of this thesis is to develop a concept for a standardized short mast anchorage for Alimaks industrial lifts. The mast anchor must go to mount on two different masts called FE and A50, can be "shaped" according to the customer's structure on the facade and the distance mast to the wall wishes to be able to adjust stepless within the distance <500 mm. Currently there are two anchors that can be used depending on which mast, of the two options, that the customer buys. However, it is not always the case that these anchors are what the customer desires, and therefore special solutions must be made. The problem with this is that the delivery of the product becomes longer and more expensive when new solutions take time to construct and when processing cannot produce on a large scale.
Today's anchors, C-Clamps and R2A, have both inspired parts of the concept developed in this work. The bracket against the mast is straight from the C-Clamps and the wall brackets are the same as in R2A but in a smaller scale. However, the structure in between is completely new. It consists of two steel U-profiles that can be extended/shortened because of slotted holes and screw joints as well as a diagonal beam, which is constructed in the same way, between them to make the anchorage stable. The distance between the mast and the wall can be adjusted by shortening / extending the” arms” or by angling them between 90˚ and 10˚. Thanks to vertical joints in the anchorage, it can be attached in many ways.
The end of the anchorage is fixed to the mast depending on the desired angle of the "arms". To avoid the "arms" going outside the elevator shaft at a large angle outward, they are attached closer to each other but when they are about 90˚, they are mounted further apart.
The new concept that develops in this work holds for the maximum forces that the anchorages can be exposed to by winds and the heaviest hoist. This with respect to cracking, tensile stress and shear in bolts. However, the screw joints will begin to slip under the high stress and this will limit how heavy the lift mounted on the mast may be. The new concept reached the goals in terms of cost and weight, that was decided in the beginning of the project.
Calculations on the anchorage have mostly been done by hand, only the most complex parts have analysed with FEM in SolidWorks.
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