Abstract: In some preferred embodiments, an impact absorbing gymnastic mat 1 includes a mat body 10 having an air-tight space 14 therein, and an openable and closable air supply and discharge port 22 for supplying and discharging air into and from the air-tight space 14 of the mat body 10. The air supply and discharge port 22 is provided at a prescribed portion of the mat body 1. The mat body 1 includes a joined member 11 and an air impermeable external sheet 20 and 21 encasing the joined member 11 so as to form the air-tight space 14. The joined member 11 includes a pair of internal sheets 12a and 12b opposed at a prescribed distance and a plurality of connecting threads 13 connecting opposed surfaces of the internal sheets 12a and 12b.

Abstract: A storage box of the present invention has a container main body 2 and a lid 3. At least three adjacent surfaces of the side surface parts of the container main body 2 are formed by a woven fabric cloth 8 including two woven fabrics 6 facing at an interval and a large number of intermediate threads 7 distributively arranged and coupling the woven fabrics. Thereby, the storage box has sufficient shape retainability and is excellent in storage performance.

Abstract: A self-driven liftup conveyor comprises a channel including a bottom plate and two side plates; a roller tray accommodated in the channel and holding a multiplicity of rollers in a rotatable manner; a belt placed all over the length of the rollers; a drive mechanism for reciprocating the belt; and a lift mechanism interposed between the roller tray and the channel for moving the roller tray together with the belt on the rollers vertically with respect to a freight stacking face. A vehicular liftup conveyor is constructed by placing that self-driven liftup conveyor and ordinary liftup conveyors in parallel on the truck bed. A truck freight loader/unloader is constructed by placing the self-driven liftup conveyor and the ordinary liftup conveyors in parallel on a platform to be connected to the truck bed. A truck freight loading system is constructed by combining the truck freightloader/unloader and the truck bed having an ordinary liftup conveyor mounted thereon.

Abstract: An apparatus for blocking the openings of a branched pipe (2) in a branched portion of a pipeline (1) prior to lining the inner surface of the pipeline (1) with a tubular lining material (100) for maintenance/repair or reinforcement purposes includes a spring-biased plug-housing assembly which carries a plurality of plugs for blocking the branch pipe openings. The plugs are installed one at a time into the branch pipe openings and are retained in the openings by a friction fit. The plug-housing assembly dispenses one plug at a time without the possibility of inadvertent dispensing of the remaining unused plugs. The plugs have cut-away portions in the outer periphery thereof, which cut-away portions cooperate for storage and installation purposes with struts on the plug-housing assembly.