The following project is a collaboration with HRI Teknik and Robomatic AB, that found a possible market for improving cleanliness in grocery stores by improving the hygiene of costumer baskets. Bacteria and left over items in the basket builds up a health risk for the costumers, if not properly cleaned regularly. The dirt and bacteria from the basket is broth home thru the groceries coming in contact during shopping. The need has been strengthened by surveys for the two store managers and the customers of the grocery store. To reduce the spreads of diseases, the baskets should be cleaned better and more frequently by having the proper detergent and cleaning system. The aim of the study is to develop a concept of a cleaning machine for baskets used in grocery stores. This is done by a well- defined technical driven development process, considering all six steps. The supportive research concerning framework has laid as a foundation for the construction of the cleaning machine. Research proves that framework creates a robust and safe construction, absorbing tensile and compressive forces in the longitudinal direction. The outcome from the technical driven process and the theoretical study is a visual, three dimensional model of concept. The concepts main function is to be driven by a belt with hooks, which is hanging on the machine. The baskets are then hanged on the movable belt in order to get cleaned. During the project, resources as material, working place and expertise is provided to sufficient degree so a concept can be developed. Since the project has a limited period of time, it was recognized the project would not be able to get to the production stages. The concept and function need to be tested and investigated to solve the remaining details. This is left for further development beyond the project, and is laying at HRI Teknik and Robomatic AB.

This diploma thesis Hydraulic rake screen deals with the design of the hydraulic screen cleaning device with a stroke of 1800 mm, which will be placed in 1000 mm wide flow chanell of the wastewater treatment facility. This paper contains structural optimalization of the structure due to operating conditions and loads, mechanical strength calculations and drawings of the device and its details.

Topic of diploma thesis is design of a municipal sweeper. It is labor vehicle, which main task is collection of street and municipal garbage. The use and implementation for other functions is also possible Topic is carefully analysed. Final variant can be divided into design, ergonomic, construction and graphic part. It is innovatory product, that respects trends of his competitor‘ s products.

This diploma thesis deals with the design of hydraulic trash rack cleaning machine for waste water treatment plant. The first part of the thesis describes methods of removing coarse impurities from intake water to technological equipment. Furthermore, a specific design including calculation and choice of the drive is made. Part of the work is also solving the course of force effects and strength analysis of the most stressed parts. The work also deals with the comparison of design solution of hydraulic and mechanical drive of the machine. The attachment contains a drawing of the cleaning machine assembly and selected welded complex.

This master’s thesis deals with a new design of bar screens. The goal was to come up with an alternative design to already existing device by INKOS a. s. In the first part, there is a summary of various machines working in similiar conditions. The insights gained by this research influenced the design of the new device. It utilizes well proven solutions from previous projects, but some of these were reworked and a few new functions were added. Second part of the thesis describes the analytical solutions, which were used to determine the forces in the assembly during the operation of the device. Based on the results of these calculations, a strength analysis of important components was performed using the finite element method. The result of this thesis is the design and optimization of new bar screens, including engineering drawings and tools for its further development.