JPH02504B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing concrete deck slabs.

Conventionally, to construct a concrete slab (so-called concrete slab), a formwork was set up using plywood, square timber, supports, etc. from the inner edge of the upper end of the wall to the area corresponding to the inner floor surface, and at the same time A formwork is set up on the outer edge of the upper end of the corresponding wall using plywood, square timbers, separators, etc., and reinforcing bars are placed inside and filled with concrete. After the hardening, each formwork is demolished and the concrete floor is The outer surface of the plate, that is, the outer surface on which the upper outer edge of the wall has been provided with the formwork, is coated with finishing mortar or covered with tiles.

However, this method not only requires time and effort to install and dismantle the formwork, prolonging the construction period, but also has disadvantages in that the formwork is disposable, making it uneconomical and raising construction costs.

Furthermore, it takes a lot of time to apply the finishing mortar or to lay the tiles, and the finishing mortar is easily peeled off because it is applied or laid after the concrete has hardened.

The present invention aims to eliminate the above-mentioned conventional drawbacks all at once.

In the present invention, a frame plate made of ceramic or fiber-reinforced concrete is installed on the outer edge of the upper end of the wall, and a locking metal fitting attached to the back side is provided at a location corresponding to the floor surface inside from the inner edge of the upper end of the wall. The frame is fixed to a molded frame, reinforcing bars are placed in it, concrete is filled, and as the concrete hardens, the frame plate is integrated with the reinforced concrete layer. As a result, a frame plate made of ceramic or the like is consolidated and integrated with the reinforced concrete layer, and this frame plate itself forms the outer surface of the concrete slab. There is no need to install tiles or apply finishing mortar to the area.

An example of constructing a concrete slab on the illustrated masonry wall will be described below.

1 is a masonry wall of a building constructed of ceramic blocks 2, and a formwork 7 is provided with plywood 3, 4, square timbers 5, and supports 6 at a position corresponding to the inner floor surface from the inner edge of the upper end.

The plywood 3 stands up along the inner edge of the upper end of the wall 1 and has a height approximately equal to one ceramic block 2. Further, the plywood 4 is horizontally stretched with its edge superposed and fixed to the upper end of the plywood 3.

Reference numeral 8 denotes a ceramic frame plate installed at the outer edge of the upper end of the wall 1, which is approximately straight plate-shaped with a width of 154 mm, a height of 300 mm, and a thickness of 23 mm, with the upper end bent diagonally to the back side, and the lower end part A locking part 9 is horizontally protruded by bending it at right angles to the back side, and a through hole 10 for screwing is formed in the center of the locking part 9, and dovetail grooves 11 and 12 are formed in two places on the upper and lower parts of the back side. are formed parallel to each other across the left and right edges.

Reference numeral 13 designates locking fittings for connecting four frame plates 8 at a time and fixing them to the formwork 7. The locking fitting 13 is made by welding a short steel plate 15 with a through hole formed to one side of an elongated steel plate 14, fitting one end of a steel rod 16 bent at right angles into this through hole, and welding the steel rod 14. A steel plate 18 having a row of through holes 17 for driving nails is welded to the other end of the rod 16.

The steel plate 14 and the steel rod 16 are arranged in a substantially T-shape, with the steel plate 14 being vertical and the steel plate 18 being horizontal. The length of the steel rod 16 is approximately three times that of the ceramic block 12, and the steel rod 16 is slightly longer than the thickness of the ceramic block 2.

In order to line up the frame boards 8 on the outer edge of the upper end of the wall 1 and frame them with the formwork 7, first arrange the two frame boards 8, 8 with a gap between the joints, and attach the locking metal fittings to the dovetail grooves 11, 11. 13 steel plates 14 are tightly fitted and both sides protrude left and right. These frame plates 8, 8 are placed on the outer edge of the upper end of the wall 1, and the through holes 10, 1 of the locking parts 9, 9 are placed.
0 has a bolt 19 pre-installed on the outer edge of the upper end.
At the same time, the steel plate 18 is applied to the plywood 4 of the formwork 7, and nails are driven through the through holes 17 to fix the steel plate 18.

Thus, on both sides of the frame plates 8, 8 established at the upper outer edge of the wall 1, other frame plates 8, 8 are installed.
The dovetail grooves 11, 11 are fitted onto the steel plate 14 and placed,
and the bolt 19 inserted into the through hole 10 of the locking part 9
The nuts 20 are tightened to connect these four frame plates 8 to each other with the locking metal fittings 13, and to establish them in a state where they are fixed to the formwork 7.

Furthermore, in the same manner as in the case of the four frame plates 8 above,
A required number of rows of frame plates 8 are installed at the outer edge of the upper end of the wall 1 at a location opposite to the formwork 4 to form a framework. Incidentally, a joint interval is provided between each of the frame plates 8, and a foamed plastic gasket (not shown) is fitted into the joint interval.

Next, the required reinforcing bars 21 are arranged in the above-mentioned framework and tightened to the longitudinal bars 22 of the wall body 1 at important points with wire, and at the same time, the upper end portions of each of the frame boards 8 arranged in a row are provided with a substantially inverted concave cross section. Elongated metal restraining rods 23 are fitted and concrete is filled, and as the concrete hardens, each frame board 8 is integrated with a reinforced concrete layer (not shown), and after hardening, the formwork 7 is demolished.
Remove the restraining rod 23 and packing and apply joint mortar.

The outer surface of the concrete floor plate thus constructed is constituted by the frame plate 8 itself integrated with the reinforced concrete layer.

In addition, in the above embodiment, the case where a ceramic frame plate is used has been described, but the present invention is not limited to this, and a frame plate made of fiber-reinforced concrete may also be used.

In addition, although two frame boards were connected in advance with locking metal fittings and then installed on the top of the wall, the number of frames was not limited to two. The appropriate number of sheets may be one or three or more.

As is clear from the above description, according to the present invention, a frame plate made of ceramic or the like, which is made to correspond to the outer surface of the concrete slab to be constructed, is consolidated and integrated with the reinforced concrete layer, and the frame plate itself In other words, unlike the conventional formwork corresponding to the external surface, it does not have to be demolished after the concrete has hardened, so the demolition work is not required.
It is possible to shorten the construction period and reduce construction costs.

In addition, since the external surface of the concrete slab is made of ceramic or fiber-reinforced concrete frame plates, there is no need for separate finishing work such as laying tiles on the external surface or applying finishing mortar, making it economical. Moreover, the construction cost can be reduced.

In addition, the ceramic frame plate mentioned above is placed on the top of the wall and the locking metal fittings attached to the back side are fixed to the formwork, so during the work to establish it, it is already established. Not only does the frame plate not shift or fall carelessly, but the frame plate also does not shift or fall when filling with concrete, so work efficiency is good.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1 and 2 are a front view and a side view of a ceramic frame plate, and FIG. 3 is a perspective view showing a state in which locking metal fittings are attached to the back surfaces of two frame plates. FIG. 4 is a side view of the main parts showing a state in which reinforcing bars are arranged in a framework made up of frame plates and formwork. 1... Wall, 3, 4... Plywood, 5... Square timber, 6
...Support, 7...Wall, 8...Frame board, 13...
...Latching metal fitting, 21...Reinforcing bar.

Claims (1)

[Claims] 1 The process of providing a formwork using plywood, square timber, supports, etc. from the inner edge of the upper end of the wall to the area corresponding to the inner floor surface, and the process of installing a frame board made of ceramic or fiber-reinforced concrete on the outer edge of the upper end of the wall. The process of fixing the locking metal fittings installed on the back side of the frame to the above-mentioned formwork and framing it, placing reinforcing bars in the above-mentioned frame and filling it with concrete, and as it hardens, the above-mentioned frame plate is integrated with the reinforced concrete layer. After that,
A method for constructing a concrete floor plate, comprising the step of removing the formwork.