Safety testing verification was conducted through static tensile load tests and dynamic stress measurements.
This document summarizes the results of safety testing and verification conducted on the wing door automatic lock and release device, "Seesaw Catch." The strength is equal to or greater than that of existing manual locking devices, and it operates even if the vehicle twists due to road surface or cargo conditions. In this case, it has been verified through technical data and safety assessments that no excessive load is applied to the seesaw catch and wing panel during the opening and closing of the wing. 【Overview of Safety Tests】 ■ Static Tensile Load Test After the seesaw catch is installed on a transport truck and subjected to an off-center load, the load-bearing capacity is measured using a precision universal testing machine. ■ Dynamic Stress Measurement The seesaw catch is installed on a transport truck to recreate various road surface conditions. The stress acting during the opening and closing of the wing is measured using a dynamic strain gauge. *For more details, please download the PDF or feel free to contact us.
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**Measurement Results** ■ Static Tensile Load Test - In the case of the seesaw catch, significant displacement occurs until the rotation of the turnplate stops, so the graph was compared after correcting the point where the load began to resist to zero. - Since the loading fixtures and mounting positions differ, a simple comparison is not possible; however, it can be understood that both the current model (modified SCCA02006) and the improved model (SCCA02008-A) are comparable to the manual locking device in terms of strength. ■ Dynamic Stress Measurement - When comparing the differences based on the mounting position of the seesaw catch, the front part exhibits greater dynamic strain than the center and rear parts. - Even when changing the surface conditions of the track (with only part of the vehicle inclined, forward/backward incline, left/right incline), there is not much dynamic strain generated in the seesaw catch during wing opening and closing. - The acting stress during the opening and closing of the seesaw catch is small, at 15N/mm² or less when open and 5N/mm² or less when closed. (The tensile strength of stainless steel is approximately 600N/mm²) *For more details, please download the PDF or feel free to contact us.*
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Would you like to work on improving logistics quality from the field? There are many simple things that are not being done in logistics operations. Striving for efficiency in loading and unloading operations and ensuring safety is the first step in providing high-quality logistics services that will please our clients. San-ai Automobile Co., Ltd. proposes the products born from the voices of the field, the automatic opening and closing device for side doors "Coming Rack" and the automatic lock and release device for wing doors "Seesaw Catch," as tools for improving logistics quality.