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日本专利,昭51-39189,1971年申请,1976年公布。在本专利中折板机的工作台9的中间布置有三个油缸11(见图1),工作时从下向上运动。工作台9上装有自由转动的滑轮55和57。平衡油缸13和19装在床身上(见图1和2),活塞杆17和23固定在工作台9上。在行程中,如果工作台9相对于横梁7倾斜,例如工作台9向上运动时,滑轮55超过57,连接随动的流量分配阀阀芯61的钢丝绳59被拉紧,克服弹簧65的力,拉阀芯61向下移动。从油泵出来的油经过管道63、随动阀和管道71进入油缸19的d
Japanese Patent 51-591,891, filed in 1971 and published in 1976. In the present patent, the middle of the table 9 of the folding machine is provided with three oil cylinders 11 (see FIG. 1), which move from bottom to up while working. Table 9 is provided with freely rotating pulleys 55 and 57. The balance cylinders 13 and 19 are mounted on the bed (see FIGS. 1 and 2), and the piston rods 17 and 23 are fixed on the work table 9. During the stroke, if the workbench 9 is inclined with respect to the crossbeam 7, for example when the workbench 9 moves upward, the sheave 55 exceeds 57, the wire rope 59 of the flow arranging valve spool 61 which is connected with the follower is pulled tight to overcome the force of the spring 65, Pull spool 61 moves downward. The oil coming out of the oil pump goes through the pipe 63, the follow-up valve and the pipe 71 into the cylinder 19 d