PROBLEM TO BE SOLVED: To provide a sleeper in which both parallel and orthogonal ridges can be responded on using a roller conveyor in fields, it can stably be arranged by using a conveyor support base capable of being arranged to the ridge diagonally following a ridge top surface at low cost, or at a height about the position of a waist of a worker using a plastic box and a simple and strong one of low cost, furthermore a conveyor can be arranged with gradient being optimal.SOLUTION: A portal conveyor receiving beam that cooperates with a sleeper-shaped support base and the same sleeper-shaped support base is proposed. Also, a plastic box for height adjustment in a sleeper-shaped support base is used, and further a character type conveyor received beam and a portal conveyor receiving beam which are cooperated with each other are proposed.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】ローラコンベアを圃場内で利用するに当たり、平行畝にも直交畝にも対応し、畝に対し斜めにも配列できるコンベア支持台で、コストが安く畝頂面に倣って、又はプラスチック箱を利用して作業者の腰の位置前後の高さに安定して配列でき、コストの安い単純で強固な物を提案すること、更にコンベアを最適な勾配を付けて配列できることを課題とした。【解決の手段】枕木型の支持台と、同枕木型の支持台と共働する門型コンベア受け梁を提案し、又枕木型の支持台に高さ調整用のプラスチック箱を用い、更に共働する一文字型コンベア受け梁及び門型コンベア受け梁を提案した。【選択図】図1
