Support steel pipe and bracket for scaffolding or falsework, and scaffolding or falsework

Abstract

Provided are a prefabricated scaffolding and a falsework capable of being easily assembled, and having a sufficient strength with high safety. Also provided is a support steel pipe to be used in the prefabricated scaffolding or falsework having a support column and a horizontal member coupled to each other using wedges. The support steel pipe includes a horizontal member coupling portion including a circular outer edge portion on an outer edge of a receiving fitting having a wedge-shaped hole. The horizontal member coupling portions are provided on an outer surface of the support column or an outer surface of assembled support columns at an equal interval. A plurality of hooks of safety belts can be engaged with the circular outer edge portion.

1 . A support steel pipe for a prefabricated scaffolding or falsework, comprising at least one horizontal member coupling portion comprising:
 a receiving fitting having a wedge-shaped hole that longitudinally passes through the receiving fitting; and   a circular outer edge portion held in contact with an outer edge of the receiving fitting,   the at least one horizontal member coupling portion being provided on a steel pipe outer surface of the support steel pipe.   
     
     
         2 . A support steel pipe according to  claim 1 , wherein the circular outer edge portion is welded to the receiving fitting so as to form a hook engaging portion of a safety belt. 
     
     
         3 . A support steel pipe according to  claim 1 , wherein, assuming that a steel pipe having a length of from 250 mm to 400 mm with the one horizontal member coupling portion being provided on a central part thereof is one unit, the support steel pipe has one of a length of one unit to fifteen units and a length shortened from the length of one unit to fifteen units by a length that is added by a joint tube. 
     
     
         4 . A support steel pipe according to  claim 1 , wherein the support steel pipe has holes for a safety pin so that two safety pins, which are provided so as to prevent a wedge portion from falling off, pass through the support steel pipe in a cross shape. 
     
     
         5 . A prefabricated scaffolding or falsework, comprising:
 the support steel pipe according to  claim 1 ; and   a horizontal member having a wedge portion on an end portion thereof.   
     
     
         6 . A prefabricated scaffolding or falsework according to  claim 5 , wherein a surface of the wedge portion, on which the wedge portion is held in contact with the steel pipe outer surface, comprises an arc-shaped curved surface that is equivalent to an arc-shaped curved surface of the steel pipe outer surface. 
     
     
         7 . A prefabricated scaffolding or falsework according to  claim 5 , wherein the horizontal member is formed of a steel pipe that is welded to three surfaces of the wedge portion, the three surfaces comprising a front surface and both side surfaces of the wedge portion. 
     
     
         8 . A bracket, comprising:
 a support steel pipe portion formed of the support steel pipe according to  claim 1 ;   a first support arm having a wedge portion on one end portion thereof, and another end portion welded and joined to an outer surface of the support steel pipe portion, which is positioned above a horizontal member coupling portion, at a right angle;   a first perpendicular support portion having one end portion welded and joined to an outer surface of the first support arm at a right angle,
 the first perpendicular support portion being parallel to a support column, 
 the first perpendicular support portion having at least one wedge portion insertable into a wedge-shaped hole of the horizontal member coupling portion of the support column; and 
   a second support arm having one end portion welded and joined to an outer surface of the first perpendicular support portion at a right angle, and another end portion welded and joined to the outer surface of the support steel pipe portion, which is positioned below the horizontal member coupling portion, at a right angle,
 the second support arm being parallel to the first support arm. 
   
     
     
         9 . A prefabricated scaffolding or falsework according to  claim 5 , further comprising a bracket, the bracket comprising:
 a support steel pipe portion formed of a support steel pipe, the support steel pipe comprising at least one horizontal member coupling portion comprising:
 a receiving fitting having a wedge-shaped hole that longitudinally passes through the receiving fitting; and 
 a circular outer edge portion held in contact with an outer edge of the receiving fitting, the at least one horizontal member coupling portion being provided on a steel pipe outer surface of the support steel pipe; 
   a first support arm having a wedge portion on one end portion thereof, and another end portion welded and joined to an outer surface of the support steel pipe portion, which is positioned above a horizontal member coupling portion, at a right angle;   a first perpendicular support portion having one end portion welded and joined to an outer surface of the first support arm at a right angle,
 the first perpendicular support portion being parallel to a support column, 
 the first perpendicular support portion having at least one wedge portion insertable into a wedge-shaped hole of the horizontal member coupling portion of the support column; and 
   a second support arm having one end portion welded and joined to an outer surface of the first perpendicular support portion at a right angle, and another end portion welded and joined to the outer surface of the support steel pipe portion, which is positioned below the horizontal member coupling portion, at a right angle,
 the second support arm being parallel to the first support arm. 
   
     
     
         10 . A support steel pipe according to  claim 2 , wherein the support steel pipe has holes for a safety pin so that two safety pins, which are provided so as to prevent a wedge portion from falling off, pass through the support steel pipe in a cross shape. 
     
     
         11 . A prefabricated scaffolding or falsework according to  claim 6 , wherein the horizontal member is formed of a steel pipe that is welded to three surfaces of the wedge portion, the three surfaces comprising a front surface and both side surfaces of the wedge portion.