Form panel and panel holding member

Abstract

It is an object of the present invention to enhance the efficiency of a concrete form construction work. A form panel 1 to be used includes a plurality of expandable parts 3 , wherein the expandable parts 3 include a plurality of projectedly bent rows 10 bent so as to be protruded toward a concrete depositing surface side and a plurality of recessedly bent rows 11 which are bent so as to be recessed toward the concrete depositing surface, the projectedly bent rows 10 and the recessedly bent rows 11 are in parallel to each other, each of the projectedly bent rows 10 and the recessedly bent rows 11 is provided with a plurality of longitudinal slits 7 at appropriate intervals from one another in a straight line.

1 . A form panel comprising an expandable parts, wherein said expandable parts comprises a plurality of projectedly bent rows bent so as to be protruded toward a concrete depositing surface side, and a plurality of recessedly bent rows which are bent so as to be recessed toward the concrete depositing surface side, said projectedly bent rows and said recessedly bent rows are in parallel to each other, each of said projectedly bent rows and said recessedly bent rows is provided with a plurality of longitudinal slits at appropriate intervals from one another in a straight line.  
     
     
         2 . A form panel according to  claim 1 , further comprising a plurality of separator inserting holes arranged at predetermined intervals from one another, wherein the separator inserting hole located at a central portion in a direction intersecting with a direction of said projectedly bent row and recessedly bent row has pointed ends in the direction of said projectedly bent row and recessedly bent row.  
     
     
         3 . A form panel according to  claim 2 , wherein most of an outline of a separator inserting hole located at a central portion in a direction intersecting with a direction of said projectedly bent row and recessedly bent row is cut, and an inner side portion and an outer side portion of the outline are connected to each other through a non-cut portion of the remaining outline.  
     
     
         4 . A form panel according to any one of  claims 1  to  3 , further comprising a plurality of separator inserting holes arranged at predetermined intervals, wherein at least the separator inserting hole located at one end in a direction intersecting with a direction of said projectedly bent row and recessedly bent row has a portion of its outer peripheral line projecting toward a center of the hole, said projecting portion is bent in a direction intersecting with a panel surface by a separator in a state in which the separator is inserted, this bent projecting portion is engaged with a shaft of the separator to restrain the separator from rotating around its axis.  
     
     
         5 . A form panel in which a rib portion which is dented from an outer surface side in a form assembled state is formed with a separator inserting hole, the separator is inserted through said separator inserting hole from its inner surface side to its outer surface side, a wall spacer is mounted to a portion of the separator projecting toward the outer surface side, said form panel is assembled into a state in which the wall spacer abuts against the peripheral portion of said rib portion from the outer surface side, wherein diameters of the separator inserting holes in two directions intersecting with each other have different shapes.  
     
     
         6 . A panel holding member for holding a form panel on a basic surface, wherein said panel holding member is long in one direction and has a horseshoe-shaped cross section comprising a bottom surface and a pair of rising portions rising upward from both ends of the bottom surface, at least one of the rising portions is provided with an opening through which a head of a nail striking tool can pass.  
     
     
         7 . A panel holding member according to  claim 6 , wherein at least one of the rising portions is provided with a holding-height adjusting piece which can be bent inward and which can support a lower end of the form panel from below in its bent state.  
     
     
         8 . A panel holding member according to  claim 6  or  7 , wherein an end of the bottom surface in a direction intersecting with said cross section is formed with an incision in said direction.