Scaffold support

Abstract

The invention relates to a scaffold support (10) comprising: a bracket (20) fixed to the wall surface (3); a screw axis member (30) having one end coupled to the bracket (20) and a male screw portion (31); an outer pipe (40) in which the other end portion of the screw axis member (30) is inserted and has a female screw portion (42) being screw-coupled to the male screw portion (31) of the screw axis member (30); a pipe rotary shaft (50) on the center of the end surface (43) of the outer pipe (40) having a polygonal head (51).

Claims

1. A scaffold support (10), one end of which is fixed on a wall surface (3) and the other end of which is coupled to a scaffold (1) so as to fix the scaffold (1) on the wall surface (3), wherein the scaffold support (10) comprises; a bracket (20) fixed on the wall surface (3) by fixing means (4, 5); a screw axis member (30) having one end coupled to the bracket (20) and a male screw portion (31) on an outer circumferential surface thereof; an outer pipe (40) which has an insertion portion (41), in which the other end of the screw axis member (30) is inserted, formed in one end thereof and a closed end surface (43) at the other end thereof, and has a female screw portion (42) being screw-coupled to the male screw portion (31) of the screw axis member (30); a pipe rotary shaft (50) which protrudes outward from a center of the end surface (43) of the outer pipe (40), and has a polygonal head (51) at a protruding front end, wherein the polygonal head (51) is inserted in a polygonal groove (72) in a tool coupling portion (71) of an electric wrench (70); and a clamp (60) having one side rotatably coupled to a clamp coupling groove (53) formed by the end surface (43) of the outer pipe (40), the pipe rotary shaft (50), and the polygonal head (51), and the other side coupled to a scaffold pipe (2) of the scaffold (1) to be attachable/detachable, wherein; if the electric wrench (70) is inserted on the polygonal head (51) of the pipe rotary shaft (50) and rotated, the outer pipe (40) is rotated around the pipe rotary shaft (50) and is moved along a longitudinal direction of the screw axis member (30) to be extended and contracted so that a length of the scaffold support (10) can be adjusted according to a distance between the wall surface (3) and the scaffold (1).

2. A scaffold support of claim 1, wherein; the bracket (20) includes a supporting plate (21) having an insert hole (22) in which the fixing means (4, 5) fixed on the wall surface (3) are inserted, and a pair of side wall (23, 24) extending vertically from the side of the supporting plate (21), and one end of the screw axis member (30) is hinged by a hinge pin (25) crossing the side wall (23, 24) of the bracket (20).

Description

DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of the preferred embodiment of the invention

(2) FIG. 2 is a side section of the above embodiment of the invention

(3) FIG. 3 is a view of extending or contracting the embodiment by using an electric wrench

(4) FIG. 4 is a view of the embodiment engaged on the scaffold

(5) FIG. 5 is a view of the embodiment in the scaffold with a different disposition

DETAILED DESCRIPTION OF THE INVENTION

(6) Hereinafter, the preferred embodiments of the invention will be described with reference to the drawings. FIG. 1 to FIG. 5 show the preferred embodiment according to the invention. As shown in FIG, the scaffold support of the invention includes a bracket fixed on wall surface 3, a screw axis member 30, one end of which is coupled to the bracket 20, an outer pipe 40 having an insertion portion 41 on one end and being screw-coupled to the screw axis member 30, a pipe rotary shaft 50 formed in the center of the end surface 43 of the other end of the outer pipe 50, and a clamp 60 rotatably coupled to the pipe rotary shaft 50 and coupled to the scaffold pipe 2 of the scaffold 1.

(7) The bracket 20 is fixed on the wall surface 3 by fixing means 4, 5. The fixing means 4, 5 can be an anchor bolt 3 and a nut 5 engaged with the anchor bolt 3, but other type of fixing means can be used.

(8) In the preferred embodiment of the invention, the bracket 20 includes a supporting plate 21 having an insert hole 22 in which the fixing means 4, 5 fixed on the wall surface 3 are inserted, and a pair of side wall 23, 24 extending vertically from the side of the supporting plate 21. As shown in FIGS. 1 and 3, an anchor bolt 4 is inserted into the insert hole 22 of the supporting plate 21 of the bracket 20, and a nut 6 is screwed on the anchor bolt 4 to fix the bracket 20 on the wall surface 3. Then, the supporting plate 21 can be attached on the wall surface 3 so that the side walls 23, 34 of the supporting plate 21 can be positioned horizontally, vertically or with various angles against the wall surface 3.

(9) The screw axis member 30 has a determined length and the bracket 20 is coupled to one end of it. A male screw portion 31 is formed on the outer circumferential surface of the screw axis member 30. The screw axis member 30 can be solid or hollow.

(10) According to the embodiment of the invention, one end of the screw axis member 30 can be hinged by the hinge pin 25 crossing the side walls 23, 24 of the bracket 20. Accordingly, the screw axis member 30 can be rotated at one end around the hinge pin 25. Then, as the side walls 23, 24 of the bracket 20 can be positioned on the side, the upper or the lower of the supporting plate 21, the hinge pin 25 can be positioned horizontally, vertically, or other various angles against the wall surface 3. Therefore, the screw axis member 30 can be rotated around the hinge pin 25, horizontally, vertically or in other angles, so that the screw axis member 30 can be rotated and coupled to the scaffold pipe 2 in various positions or dispositions.

(11) The outer pipe 40 has an insertion portion 41 on one end in which the other end of the screw axis member 30 is inserted, and a female screw portion 42 on the inner surface thereof. FIG. 2 shows an embodiment in which the female screw portion 42 is formed on one end adjacent to the insertion portion 41, but it can be formed along the outer pipe 40. As the outer pipe 40 is rotated against the screw axis member 30, it moves along the longitudinal direction of the screw axis member 30 so that the scaffold support 10 can be extended or contracted. The other end of the outer pipe 40 is closed by a closed end surface 43 having a central engaging hole 44.

(12) A pipe rotary shaft 50 protrudes outward at the center of the closed end surface 43 of the outer pipe 40 and has an enlarged polygonal head 51, such as hexagonal head at the outer end of it. It can be made of bolt with hexagonal head and inserted in the engaging hole 44 of the end surface 3 and is welded. The polygonal head 51 can be engaged with the polygonal groove 72 of the tool coupling portion 71 of the electric wrench 70. And a clamp coupling groove 53 is formed by the end surface 43 of the outer pipe 40, the shaft of the pipe rotary shaft 50, and the polygonal head 51 of the pipe rotary shaft 50.

(13) The clamp 60 is rotatably coupled on one side with the clamp coupling groove 53 of the pipe rotary shaft 50 and is coupled on the other side with the scaffold pipe 2 of the scaffold 1. As shown in FIGS. 1 and 2, the clamp 60 includes clamp body 60 rotatably coupled to the clamp coupling groove 53 of the pipe rotary shaft 50, a clamp cover 62 hinged on the hinge pin 63 in one end of the clamp body 61 and enclosing the pipe 2 of the scaffold 1, and a fastener 64 hinged on the other side of the clamp body 61 to fasten the clamp cover 62 against the pipe 2 of the scaffold 1. A hole 61a is formed on the clamp body 61 through which the pipe rotary shaft 50 extends, and the polygonal head 51 of the pipe rotary shaft 50 is engaged around the hole 61a.

(14) The scaffold support 10 as described above is installed, as shown in FIG. 3, by firstly inserting the anchor bolt 4 on the wall surface 3 into the insert hole 22 of the supporting plate 21 of the bracket 20, and fixing the bracket 20 on the wall surface 3 by screwing up the nut 4, then coupling the clamp 60 on the pipe 2 of the scaffold 1 spaced apart from the wall surface 3. If the distance between the wall surface 3 and the scaffold 1 is different, before the clamp 60 is coupled on the pipe 2 of the scaffold 1, the polygonal head 51 of the pipe rotary shaft 50 should be rotated by inserting the electric wrench 70 into the polygonal head 51 and rotating the electric wrench 70, then the outer pipe 40 is rotated around the pipe rotary shaft 50 and moves along the longitudinal direction of the screw axis member 30, so that the scaffold support 10 itself should extend or contract and the adjusted scaffold support 10 can be used to fix the scaffold 1 on the wall surface 3.

(15) As described above, according to the invention, the scaffold support 10 can be easily and rapidly adjusted by using the electric wrench 70 instead of worker's manual adjusting. Therefore, the length of the scaffold support 10 can be easily and rapidly adjusted according to the distance between the wall surface 3 and the scaffold 1, which will enhance the construction efficiency and reduce the working time.

(16) And, as shown in FIG. 5, when the anchor bolt 4 embedded on the wall surface 3 and the pipe 2 of the scaffold 1 are offset and not aligned horizontally or vertically, then the screw axis member 30 of the scaffold support 10 can be rotated around the hinge pin 25 of the bracket 20 so that the clamp 60 can be coupled to the pipe 2 of the scaffold 1, therefore, the scaffold 1 can be easily fixed on the wall surface 3 in various construction conditions.