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1. 发明公开

EP0578820A1 CRUSHER FOR CONCRETE STRUCTURE 失效
标题翻译： BRECHMASCHINEFÜRBETONSTRUKTUREN。
公开(公告)号：EP0578820A1
公开(公告)日：1994-01-19
申请号：EP92904243.0
申请日：1992-02-03
申请人： TAGAWAKOUGYOU CO., LTD.
发明人： TAGAWA, Ituo , KOZAKI, Takaharu
IPC分类号： E04G23/08 , F15B15/16
CPC分类号： E04G23/08 , E04G23/082 , E04G2023/086
摘要： A crusher for crushing a column or beam of a concrete structure by holding a column or beam by means of press breaking blades provided at the leading end of an arm and opening and closing the arm. A hydraulic cylinder (1) for opening and closing the arm comprises a second cylinder in which the bottoms of two cylinders (3' and 3'') are connected to each other, and a first cylinder in which the cylinder bottoms fitted into the respective cylinders (3' and 3'') serve as pistons (9). When a hydraulic fluid is introduced via a fifth oil port (18) that is provided on the cylinder bottom side of the second cylinder, the first cylinder (2) is caused to move forward, and when the first cylinder (2) reaches the stroke end, the piston of the first cylinder is caused to move forward, this forward movement of the piston causing the arm to be closed to thereby press break a concrete structure. When the hydraulic fluid is introduced via a fourth oil port (16), the hydraulic fluid so introduced causes a piston (5) to move backward through a second oil port (10) and an oil passage (11), and when the piston (5) reaches the stroke end, the pressure of the hydraulic fluid is caused to act on the cylinder bottom of the first cylinder through a gap (between 24 and 25) having a set fluid resistance for establishing a communication between the second oil port (10) and a piston rod side fluid chamber (14) of the second cylinder to thereby cause the first cylinder (2) to move backward, this backward movement serving to open the arm. Supply of the hydraulic fluid to the hydraulic cylinder (1) is effected only via the fourth oil port (16) and fifth oil port (18), this resulting in easy control.
摘要翻译：一种破碎机，其用于通过设置在臂的前端处的冲压破碎刀片并打开和关闭臂来压住混凝土结构的柱或梁。用于打开和关闭臂的液压缸（1）包括第二气缸，其中两个气缸（3'和3“）的底部彼此连接，第一气缸，其中气缸底部装配到相应的气缸（3'和3“）用作活塞（9）。当通过设置在第二气缸的气缸底侧的第五油口（18）引入液压流体时，使第一气缸（2）向前移动，并且当第一气缸（2）到达行程使第一气缸的活塞向前移动，活塞的向前运动使臂关闭，从而冲压混凝土结构。当通过第四油口（16）引入液压流体时，如此引入的液压流体使活塞（5）向后移动通过第二油口（10）和油通道（11），并且当活塞 5）到达行程末端，液压流体的压力通过具有设定的流体阻力的间隙（在24和25之间）作用在第一气缸的气缸底部上，以建立第二油口（10））和第二气缸的活塞杆侧流体室（14），从而使第一气缸（2）向后移动，该向后运动用于打开臂。仅通过第四油口（16）和第五油口（18）对液压缸（1）供给液压油，从而易于控制。

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