| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique which can effectively use concrete existing in piping transferring concrete after concrete placing. <P>SOLUTION: A concrete discharge device includes: an air supply part which supplies air; an extrusion part which is moved in piping by air supplied from the air supply part to extrude concrete in the piping; and a restriction part which restricts the movement of the extrusion part. The restriction part includes: a string-like member having a length corresponding to a movable distance of the extrusion part; a fixing material 952 which is provided on the tip of the string-like member to fix the restriction part; and a lock material 951 which is provided on the base end of the string-like member and, when the extrusion part reaches a limit of the movable distance, is hooked to a part of an air supply pipe 912. <P>COPYRIGHT: (C)2013,JPO&INPIT |
