Pallet Fixing Lock, Determination of Shear Resistance and Spring Stiffness
Leopold Hrabovský 1  
,  
Vieroslav Molnár 2  
,  
Gustav Kotajný 3  
,  
Jozef Kuľka 4  
 
 
More details
Hide details
1
VSB - Technical University of Ostrava Faculty of Mechanical Engineering 17. listopadu 2172/15, 708 00 Ostrava - Poruba, Czech Republic
2
Technical University of Košice Faculty of Manufacturing Technologies with a seat in Prešov, Bayerova 1, 080 01 Prešov, Slovak Republic
3
KOMA - Industry s.r.o. Ruská 514/41, 706 02 Ostrava - Vítkovice, Czech Republic
4
Technical University of Košice Faculty of Mechanical Engineering Letná 9 Street, 042 00 Košice, Slovak Republic
CORRESPONDING AUTHOR
Leopold Hrabovský   

VSB - Technical University of Ostrava Faculty of Mechanical Engineering 17. listopadu 2172/15, 708 00 Ostrava - Poruba, Czech Republic
Publication date: 2020-06-01
 
Adv. Sci. Technol. Res. J. 2020; 14(2):190–197
KEYWORDS
TOPICS
ABSTRACT
The paper contains the designs of a number of modifications of testing devices, which were constructed for the purposes of checking functional properties of the mechanical pallet fixing lock, which is used for securing pallets with cars in parking houses, built by the company KOMA - Industry s.r.o The individual testing devices consist of one or two positioning devices, whose moveable parts are placed perpendicular to each other in the frame of the testing device. A mechanical pallet fixing lock is attached to the moving part of the perpendicular positioning device, and it consists of the following three parts: the body, the pulley holder and a compression coil spring. A plate is attached to the moveable part of the horizontal positioning device, and is adapted to receive a pressure force sensor or to engage a mechanical fixation lock or the break of an electromagnetic locking device. The paper contains the description and method of experimentally determined resistance, which is created by shear friction on contact surface, when inserting or withdrawing the pulley holder tube from the plain bushing of the fixation lock body. The paper gives values of measured vertical forces, which are generated by the deformed compression spring with a wire of circular cross-section during inserting/withdrawing of the pulley holder tube into/from the fixation lock body. The obtained values, from performed experimental measuring of vertical forces and frictional resistance during the inserting of the pulley holder tube into the plain bushing of the fixation lock body will be used for subsequent checking of functional properties of pallet fixation locks and will allow to determine the optimal position for attaching pallet fixation locks to stack cell steel beams in the parking house, on which chain conveyers push pallets with cars into specified positions, where cars are are parked.