JP2016130421A - Bearing member for scaffold board, and bearing method for scaffold board using the same applied when casting foundation concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing member for a scaffold board that enables a worker to walk and work on the scaffold board after casting foundation concrete and before the foundation concrete is cured, by assembling the bearing member to a foundation reinforcing bar before casting the foundation concrete.SOLUTION: Iron rods 2, 2 are intersected with foundation reinforcing bars T, T and fastened. The iron rods 2, 2 are sandwiched from above and below with a pair of metallic holding plates 4, 5, and a top edge of a support bolt inserted into a bolt insertion hole of the lower metallic holding plate 5 from an undersurface side is made to protrude from a bolt insertion hole of the upper metallic holding plate 4. Two nuts 7, 8 are screwed into the protruded part of the support bolt. The nut 8 narrows a gap between the pair of upper and lower metallic holding plates 4, 5 that face each other, thus sandwiching the iron rods 2, 2. A lower edge part of a connection support part 9 is screwed into a top edge part of the support bolt for connection, the connection support part having a tapered lower side 9A. Another support member 1 for a scaffold board is assembled with the foundation reinforcing bar, in the same processes leaving a prescribed distance in between. Finally, the scaffold board is mounted over scaffold board support parts 9B, 9B of both support members 1, 1 for the scaffold board.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a support member for a scaffold plate and a method for supporting the scaffold plate at the time of foundation concrete placement using the same.

  In general, when constructing a building such as a building, foundation concrete is first placed, and then the rising concrete is placed after the foundation concrete is hardened.

  This foundation concrete usually takes about 1 day to harden, and if it does not harden to some extent, workers cannot walk on it. Cannot be placed.

  Then, since the concrete at the rising portion is placed after the foundation concrete is cured in this manner, the degree of curing differs between the concrete at the rising portion and the concrete at the rising portion. For this reason, both are not systematically integrated completely. This also creates a gap at the boundary between the two. This is because the surface (upper surface) of the foundation concrete is not a completely smooth surface but a slightly uneven surface. And if there is a gap between the two, the water that has entered from this gap rusts the reinforcing bars inside, and there is a problem that the life of the reinforcing bars is shortened.

  In addition, since the systematic complete integration of the foundation concrete and the concrete at the rising portion cannot be performed, there is a problem that the boundary portion between the two is brittle in strength.

  In addition, since the work must be interrupted from the completion of foundation concrete placement to the concrete placement of the rising section, it takes a lot of wasted time, and during this time, lease fees for heavy machinery (such as pumps for raw concrete) And labor costs are also necessary, and the cost will increase accordingly.

Also, after placing the concrete foundation, workers may want to walk on it to smooth the surface (upper surface) while it is uncured, but this has not been possible in the past. .

  The present invention has been made in view of the above points, and by placing the foundation concrete before assembling the foundation concrete, after placing the foundation concrete, in an uncured state, By using a scaffolding board, workers can walk and work above it, and the foundation concrete is uncured, and the concrete at the rising part is placed, so that both are systematically integrated. Can eliminate the occurrence of gaps at the boundary between the two and increase the strength of the boundary, and can significantly reduce the time required for placing concrete and greatly increase the cost. In addition, a support member for a scaffolding plate, which can also reduce the surface of the foundation concrete and smooth the surface (upper surface) while the base concrete is uncured, and using the same It is intended to provide a method for supporting scaffolding plate in foundation concrete after casting.

  Thus, the present invention crosses and bridges the basic reinforcing bars, and fixes the both ends to the basic reinforcing bars with a wire or the like, and positions the iron bars so as to sandwich them from above and below, and the bolt insertion hole at the center. A pair of drilled metal clamping plates and a bolt insertion hole of the lower metal clamping plate of the pair of metal clamping plates from the lower surface side, and an upper end bolt insertion hole of the upper metal clamping plate A support bolt that protrudes from the base, two nuts that are screwed into a portion that protrudes from the bolt insertion hole of the metal clamping plate on the upper side of the support bolt, and a taper that is reduced in diameter toward the lower end on the lower side In addition, a connecting support portion in which a screw hole that is screwed into the upper portion of the two nuts in the support bolt is formed in the lower end portion, and a scaffold plate support portion that projects to the right and left is formed on the top portion on the upper side. Feet characterized by consisting of It is an gist support plate.

  Further, the present invention uses the support member for the scaffold plate, and firstly fixes the iron bar so as to cross the basic rebar, and then lowers the bottom surface of the pair of metal sandwich plates in the bolt insertion hole of the lower metal sandwich plate. The support bolt is inserted from the side, the upper side of the support bolt is further inserted into the bolt insertion hole of the upper metal holding plate, and the iron bar is sandwiched from above and below by a pair of upper and lower metal holding plates, Next, the two nuts are screwed into a portion protruding from the bolt insertion hole of the metal clamping plate on the upper side of the support bolt, and then the lower nut of the two nuts is twisted in the tightening direction, The opposing gap between the pair of upper and lower metal sandwiching plates is narrowed to sandwich the iron rod, and then the upper end portion of the support bolt is screwed into the screw hole formed in the lower end portion of the connection support portion and connected. Along with the scaffolding plate support, it supports Twist and adjust the upper nut so that it is in a position perpendicular to the axis of the scaffolding plate, and then attach the scaffolding plate support member to the foundation rebar at a predetermined distance in the same procedure as above. When the foundation concrete placed on the scaffolding plate support part of the supporting member of the scaffolding board is straddled and hardened to the extent that the worker can walk, the scaffolding board is removed and the connection supporting part is supported by the support bolt. The gist of the present invention is also a method for supporting a scaffolding plate at the time of foundation concrete placement using a scaffolding plate supporting member that is removed from the foundation.

  Since the scaffolding plate supporting member according to the present invention and the method of holding the scaffolding plate at the time of placing the concrete using the same are as described above, the scaffolding plate must be assembled to the foundation rebar before placing the foundation concrete. Thus, after placing the concrete foundation, the worker can walk and work on the upper side of the foundation concrete using the scaffolding plate in an uncured state. Accordingly, it is possible to place the concrete at the rising portion while the basic concrete is uncured, and the basic concrete and the concrete at the rising portion can be systematically completely integrated. As a result, it is possible to eliminate the occurrence of a gap at the boundary portion between the two and increase the strength of the boundary portion. In addition, the time required for placing concrete can be greatly reduced and the cost can be greatly reduced. In addition, the surface (upper surface) of the foundation concrete can be leveled while it is uncured. It is something.

It is a perspective view of each member which comprises the support member of the scaffold board which concerns on embodiment of this invention. It is an expansion perspective view of the lower end part of the connection support part. It is a perspective view of the state assembled | attached to the basic reinforcement. The procedure of the assembling method is shown, in which a steel bar is fixed to a basic rebar, and a support bolt is inserted through a pair of upper and lower metal clamping plates. The procedure of the assembly method is shown, and shows a state in which two nuts are screwed onto the upper end portion of the support bolt. The procedure of the assembling method is shown, and a state in which the lower end portion of the connection support portion is screwed to the upper end portion of the support bolt is shown. The procedure of the assembly method is shown, and the upper nut is twisted. The procedure of the assembly method is shown, and is a cross-sectional view of a state in which a connection support portion is connected to an upper end portion of a support bolt. It is a perspective view of the state which assembled | attached to the foundation reinforcement and mounted the scaffold board. It is sectional drawing of the state which removed the connection support part from the support bolt, when it became a required hardening state after placement of the foundation concrete.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

First, the support member for the scaffold plate will be described.
In the figure, reference numeral 1 denotes a support member for a scaffold plate that is assembled to a foundation rebar at a predetermined distance. Moreover, the supporting member 1 of the scaffold plate is composed of members such as the following iron bars, a pair of metal holding plates, and supporting bolts.

  2 and 2 are iron bars, and it is only necessary to use a piece of reinforcing steel as a waste material, which makes it possible to reduce costs. Further, the iron bars 2 and 2 are crossed and bridged between the basic rebars T and T, and both ends are fixed to the basic rebars T and T with wires 3, 3 and the like.

  Reference numerals 4 and 5 denote a pair of metal clamping plates which are positioned so as to sandwich the iron bars 2 and 2 from above and below, and have bolt insertion holes 4a and 5a formed in the center.

  Reference numeral 6 denotes a support bolt, which is inserted through the bolt insertion hole 5a of the lower metal sandwich plate 5 in the pair of metal sandwich plates 4 and 5 from the lower surface side, and the upper end of the bolt of the upper metal sandwich plate 4 It protrudes from the insertion hole 4a.

  Reference numerals 7 and 8 denote two nuts which are screwed into portions protruding from the bolt insertion holes 4a of the metal holding plate 4 on the upper side of the support bolt 6. The lower nut 8 of the two nuts 7 and 8 is twisted in the tightening direction to narrow the gap between the pair of metal clamping plates 4 and 5 so as to sandwich the iron bars 2 and 2. The upper nut 7 is connected to the upper end portion of the support bolt 6 by twisting and moving in the opposite direction to the nut 8 when connecting the connection support portion described later. The scaffolding plate support part in the is for fixing at a position orthogonal to the axis of the scaffolding plate on which it is supported.

  9 is a connection support part which connects with the upper end part of the said support bolt 6, and mounts a scaffold board. In addition, the connecting support portion 9 has a lower side 9A that has a tapered shape with a diameter decreasing toward the lower end, and a screw hole that engages the lower end portion with the upper portions of the two nuts 7 and 8 of the support bolt 6. 9a is engraved, and a scaffolding plate supporting portion 9B is formed on the top portion on the upper side so as to extend perpendicularly to the left and right.

Reference numeral 10 denotes a scaffold plate placed on the scaffold plate support 9B in the connection support portion 9. In addition, in the figure, 11 is a formwork for placing concrete at a rising portion, 12 is a rising rebar, and 13 is foundation concrete that has been placed.

Next, a description will be given of a method for supporting the scaffold plate during foundation concrete placement using the support member 1 for the scaffold plate.

First, as shown in FIG. 4, the iron bars 2 and 2 are fixed by using the wire 3 so as to cross the basic reinforcing bars T and T. Next, the support bolt 6 is inserted into the bolt insertion hole 5a of the lower metal sandwich plate 5 of the pair of metal sandwich plates 4 and 5 from the lower surface side, and the upper side of the support bolt 6 is sandwiched with the upper metal sandwich plate. The steel rods 2 and 2 are sandwiched from above and below by a pair of upper and lower metal clamping plates 4 and 5 inserted through the bolt insertion holes 4a of the plate 4.

First, as shown in FIG. 5, two nuts 7 and 8 are screwed into a portion protruding from the bolt insertion hole 4 a of the metal holding plate 4 on the upper side of the support bolt 6. Next, the lower nut 8 is twisted in the tightening direction to narrow the facing gap between the pair of upper and lower metal clamping plates 4 and 5 to sandwich the iron bars 2 and 2. Thereby, the support bolt 6 is fixed perpendicularly to the foundation reinforcing bars T and T.

First, as shown in FIG. 6, a screw hole 9a carved in the lower end portion of the connection support portion 9 is screwed and connected to the upper end portion of the support bolt 6, and as shown in FIG. 7, the scaffolding plate support portion 9B. However, the upper nut 7 is twisted and adjusted so that it is in a position orthogonal to the axis of the scaffolding plate 10 on which it is supported. The nut 7 is twisted using a tool such as a spanner, and the nut 7 is twisted in the direction opposite to the tightening direction of the nut 8 to securely fix the connection support portion 9 at a predetermined angle. .

Thus, the assembly of the support member 1 of the first set of scaffolding plates is completed. Next, another set of scaffolding plate support members 1 is assembled to the basic reinforcing bars T and T at a predetermined distance in the same procedure. This state is as shown in FIG. And after that, it mounts so that the scaffold board 10 may be straddled on the scaffold board support parts 9B and 9B in the supporting members 1 and 1 of both scaffold boards. FIG. 9 shows this state. And after that, the foundation concrete 13 is cast in this state.

According to such a method, after the foundation concrete 13 is placed, the worker can walk and work on the upper side of the foundation concrete 10 using the scaffold board 10 while the foundation concrete 13 is in an uncured state. Therefore, it is possible to place the rising concrete (not shown) while the foundation concrete 13 is uncured, and systematically and completely integrate the foundation concrete 13 and the rising concrete. It is something that can be done. As a result, it is possible to eliminate the occurrence of a gap at the boundary portion between the two and increase the strength of the boundary portion. Further, the time required for the concrete placing work can be greatly reduced and the cost can be greatly reduced. In addition, the surface (upper surface) of the basic concrete 13 can be smoothed while it is uncured. It will be like that.

Further, when the cast concrete foundation 13 is hardened to such an extent that an operator can walk, the scaffold board 10 is removed and the connection support portion 9 is removed from the support bolt 6. At this time, since the lower side of the connection support portion 9 is tapered, it can be easily pulled upward after being twisted. And the removed connection support part 9 is reused in another place.

1 Support member for scaffolding plate 2, 2 Iron bar
4, 5 A pair of metal clamping plates 4a Bolt insertion holes,
5a Bolt insertion hole 6 Support bolt 7, 8 Nut 9 Connection support portion 9A Lower side 9a of connection support portion Screw hole 10 Scaffold plate

Claims (2)

  A pair of metal clamps with a bolt insertion hole drilled in the center and a steel bar that crosses and bridges between the basic rebars and positions both ends of the steel bar to the foundation rebar with a wire etc. A support bolt that is inserted from the lower surface side into the bolt insertion hole of the lower metal clamping plate of the plate and the pair of metal clamping plates, and the upper end protrudes from the bolt insertion hole of the upper metal clamping plate; Two nuts to be screwed into a portion protruding from the bolt insertion hole of the metal clamping plate on the upper side of the support bolt, and the lower side is formed into a taper shape with a diameter decreasing toward the lower end, and the support bolt at the lower end portion. A screw hole that is screwed into the upper part of the two nuts in the upper part, and a connecting support part that forms a scaffolding plate support part that projects perpendicularly to the left and right at the top part of the upper part. Scaffolding plate support member. The supporting member for the scaffolding plate according to claim 1 is used. First, the iron bar is crossed and fixed to the basic reinforcing bar, and then the lower surface side of the bolt insertion hole of the lower metal holding plate in the pair of metal holding plates. The support bolt is inserted through, and the upper side of the support bolt is further inserted into the bolt insertion hole of the upper metal holding plate, and the iron bar is sandwiched from above and below by the pair of upper and lower metal holding plates. The two nuts are screwed into a portion protruding from the bolt insertion hole of the metal clamping plate on the upper side of the support bolt, and the lower nut of the two nuts is then twisted in the tightening direction, Narrow the gap between the pair of upper and lower metal clamping plates to sandwich the iron bar, and then screw and connect the upper end of the support bolt with a screw hole formed in the lower end of the connection support portion , The scaffolding plate support, the foot it supports Twist and adjust the upper nut so that it is in a position perpendicular to the axis of the plate, and then attach the support member of the scaffold plate to the foundation rebar at a predetermined distance in the same procedure as above, and finally both scaffolds When the foundation concrete is placed so as to straddle the scaffold plate in the support member of the plate and the cast concrete has hardened to such an extent that workers can walk, the scaffold plate is removed and the connection support portion is removed from the support bolt. A method for supporting a scaffold plate during foundation concrete placement using a support member for the scaffold plate, wherein the scaffold plate support member is removed.

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