JPS6357574B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete slab forming method and a heat insulating material fixing and reinforcing bar support fitting in the method.

The conventional concrete slab forming method is
As shown in FIG.
After fixing this heat insulating material b to the formwork a with nails c etc., concrete d is poured directly as shown in Fig. 1, or blocks for spacers are placed on the surface of the insulating material b as shown in Fig. 2. Concrete slabs have been formed by placing concrete blocks e, placing reinforcing bars f on top of block e, and then pouring concrete d onto heat insulating material b. It is difficult to securely fix the steel on the formwork a, and when spacer blocks e, etc. are placed and the reinforcing bars f are arranged, the spacer blocks e sink into the insulation material b when the reinforcing bars are placed or concrete is poured. As a result, there was a drawback that the distance between the surface of the heat insulating material b and the reinforcing bar f, that is, the cover thickness specified by the Building Standards Law, became thinner.

SUMMARY OF THE INVENTION In view of these drawbacks, the present invention seeks to provide a method of forming a concrete slab that is easy to form, and that can sufficiently support reinforcing bars and secure heat insulating material, as well as metal fittings for the same.

What is illustrated is a heat insulating material fixing and reinforcing bar supporting metal fitting used in such a concrete slab forming method, and the concrete slab is formed using this supporting metal fitting.

First, the details of the heat insulating material fixing and reinforcing bar support fitting s will be explained based on the drawings.The metal fitting s is a nail-shaped rod 2 that is erected through a reference plate 1 having an appropriate shape such as a circular or square shape. The upper end has a receiving part 3 for placing reinforcing bars, and the one shown in the figure is made by fixing a plate slightly curved upwards, and the lower part of the rod 2 protruding downward from the reference plate 1 is A formwork 5 made of plywood etc. is inserted through the insulation material 4 laid in the concrete slab.
It has a length that can be driven onto the reference plate 1.
The distance from the top surface to the reinforcing bar mounting receiving part 3 is set to a certain height that maintains the cover thickness of the building standards, that is, a distance that keeps the position of the reinforcing bars 6 from the surface of the insulation material 4 constant. It is fixed.

The nail-shaped rod 2 and the reference plate 1 shown in FIG. 3 are fixed to each other by welding or the like, but as shown in FIG. 5, the reference plate 1 and the rod 2 are separable from each other. A through hole 7 is provided in the center of the plate 1, the rod 2 can be inserted into the through hole 7, and a stopper 8 is provided to prevent the reference plate 1 from moving upward at a certain position so that the above-mentioned covering distance can be maintained. good.

Therefore, the concrete slab forming method according to the present invention uses such a heat insulating material fixing and reinforcing bar support fitting s.
First, a heat insulating material 4 such as a foamed polystyrene board is laid on the upper surface of a formwork 5 made of plywood, etc., and a heat insulating material fixing and reinforcing bar support fitting s is placed on the surface of this heat insulating material 4 as shown in FIGS. 3 and 4. Drive the nail-shaped rod part 2 under the reference plate 1, hold the surface of the insulation material 4 with the bottom surface of the reference plate 1, fix it on the formwork 5, and place the rebar mounting part 3 on the surface of the insulation material 4. It is installed at a certain distance from the After installing an appropriate number of such heat insulating material fixing and reinforcing bar supporting fittings s at the positions where the reinforcing bars are to be placed, the reinforcing bars 6 are placed on the reinforcing bar placement receiving part 3.
A concrete slab is formed by placing concrete 9 on top of the heat insulating material 4. At this time, when pouring concrete,
Even if pressure is applied to the reinforcing bars 6 and the heat insulating material fixing and reinforcing bar support metal fittings s, the rod 2 of the metal fittings s penetrates the heat insulating material 4 and is driven into the formwork 5, and the heat insulating material 4 is fixed by the metal fittings. , the reference plate 1 part is the insulation material 4
As in the traditional concrete slab forming method,
It is not press-fitted, so the reinforcing bar placement receiving part 3
It is possible to maintain a constant cover thickness without changing the distance between the surface of the heat insulating material 4 and the surface of the heat insulating material 4. In addition, since the heat insulating material 4 is fixed at an appropriate position by the nail-shaped rod 2 and the reference plate 1, it will not move during concrete pouring or during each work process during concrete pouring, thereby causing no problems. Moreover, when the reinforcing bar mounting receiving part 3 is curved upward as described above, even if the reinforcing bar 6 is placed, the reinforcing bar 6 will not fall from the receiving part 3 of the metal fitting s, and the reinforcing bar 6 will not fall from the receiving part 3 of the metal fitting s. Workability can be improved. In addition, when making it possible to fix the reinforcing bars 6 and the reinforcing bar mounting receiving part 3 to each other, the arrangement of the reinforcing bars 6 becomes even more fixed, and By having the shape of the mounting receiving part 3 as shown in FIG. 6, the upper surface of the rod 2 of the metal fitting s is held when driving into the formwork 5 such as plywood, which is preferable.

As described above, the concrete slab forming method and its heat insulating material fixing and reinforcing bar supporting metal fittings according to the present invention can form a concrete slab by accurately and reliably fixing and maintaining each member when forming a concrete slab. Further, the metal fittings fix the heat insulating material on the formwork, making the concrete slab forming work reliable and easy, and also making the setting of the cover thickness constant when reinforcing bars are installed.

[Brief explanation of the drawing]

1 and 2 are sectional views explaining the conventional example, FIG. 3 is a sectional view illustrating the implementation state of the present invention, FIG. 4 is a perspective view of the same as FIG. 3, and FIG. 5 is a perspective view of another embodiment of the metal fitting. , 6th
The figure is a sectional front view of an embodiment of the metal fitting. 1: reference plate, 2: rod, 3: receiver, 4: heat insulator, 5: formwork, 6: reinforcing bar, 7: through hole, 8: stopper, 9: concrete.

Claims (1)

[Scope of Claims] 1. A heat insulating material fixing and reinforcing bar supporting metal fitting, which is formed by fixing a reinforcing bar mounting receptacle to the upper end of a nail-like rod that is erected through a reference plate, is attached to the insulating material laid on the base. A method for forming a concrete slab, comprising: fixing a heat insulating material on a base, placing reinforcing bars on the receiving part of the supporting metal fitting, and then pouring concrete on the heat insulating material. 2. A heat insulating material fixing and reinforcing bar support fitting made by fixing a reinforcing bar mounting receptacle to the upper end of a nail-like rod that is erected through a reference plate.