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  • 1.
    Bergman, Emil
    et al.
    University of Skövde, School of Engineering Science.
    Wikström, Anna
    University of Skövde, School of Engineering Science.
    Påkörningsskydd i bearbetningsfabriker: Utveckling av påkörningsskydd för industrifordon2015Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    In a large part of the industrial accidents different kinds of forklifts are involved. Collision protection barriers are often used to prevent pedestrians from coming into direct contact with industrial vehicles. The Volvo Group Truck Operations facility in Skövde uses such collision protection barriers to separate pedestrians from industrial traffic. Volvo’s welded steel collision protection barriers are constructed in place, depending on need, and are fastened to the concrete floor with expander bolts. The barriers are, therefore, difficult to disassemble and reuse in other locations. Volvo has requested the development of a conceptual design of a reusable and repairable modular collision protection barrier. To ensure that the specifications for the product are fulfilled strength calculations are performed.

    In order to complete the work a literature survey is carried out where current collision protection barriers, fastening methods for concrete, methods of calculations, safety demands and a product developing process are examined. Interviews are conducted and on-site observations are made to identify the necessary specifications. Observations showed that in a collision the expander bolts often tear loose from the concrete floor due to the robustness of the current collision barriers. The specifications are used to generate concepts. The developed concepts are evaluated and evolved in an iterative process where the specifications are refined at each step. The result, a modular conceptual design with two different alternatives to fasten it to the concrete floor, is presented. The idea is that the conceptual design shall be sized to give way at the maximum load of the fastening alternative.

    Strength calculations, performed on the most critical components, shows that it is difficult to size the collision protection barrier to guarantee that the intended component breaks in a collision. A Failure Mode and Effects Analysis is conducted to identify any flaws in the conceptual design and suggestions to address the flaws are made.

    The conceptual design fulfils the specifications that are currently possible to evaluate. These specifications are that the design is modular, easy to disassemble, repair and reuse, easy to store and meets the safety demands.

    Further work with strength calculations and sizing of the collision protection barrier is required. To ensure that the specifications are fulfilled and that the collision protection barrier behaves as desired in a collision it is recommended that prototypes be manufactured and tested. 

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