Abstract: A tubular switch which is normally off, instantaneously turned on by external pressure, and has long detection distance. The tubular switch comprises a tubular hose member having insulating property and elasticity, and a plurality of flexible conductive members which are spirally fixed to the internal surface of the hose member so that the surfaces of the conductive members should be partially exposed to the internal space of the hose member at any section of the hose member. The tubular switch has durability, can be installed any place, and can have a long detection range, and, in addition, any faults are easily found, repaired and adjusted, it has a simple structure and flexibility, and it can be manufactured at a low cost.

Abstract: A lift for loading and unloading a truck. The truck has a loading chamber, a rear body portion and a chassis frame, and the lift has support posts mounted at an end and at each side of the truck at the rear body portion. A connecting member connecting the lower ends of each support post is provided. A drive moves the support posts in an upward and downward direction. A lift table has an opening formed in a portion corresponding to the chassis frame. The lift table is supported by the connecting member and is slidable on the connecting member in a longitudinal direction to the loading chamber thereby traversing the connecting member.