JPS6237843Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a deck plate used as a disposable formwork for concrete floor slabs.

(Prior art) A deck plate used as a disposable formwork for a concrete deck slab is made by making the upper surface 1 of the metal floor plate flat and crushing both ends of the triangular hollow rib 2 at the bottom, as shown in Fig. 1. It's a blockage.

The deck plate 3 having such a structure is supported by placing both ends on the upper edge of the beam side formwork 5 supported on the shoring 4 and on the timbers 6 as shown in FIG. In order to prevent the deck plate 3 from falling when and after removing the beam 6 after the poured concrete 7 has hardened and demolding the beam side formwork 5, the deck plate 3 is used as shown in the figure. 3 is supported by protruding inward from the upper end edge of the beam side formwork 5, and is embedded and locked in the beam concrete by pouring concrete 7.

(Problems to be Solved by the Invention) However, if the deck plate is supported and used as a disposable formwork as described above, the cross section of the beam will be damaged, resulting in a structural problem.

(Purpose of the invention) The present invention was made to solve the above problems, and is a deck for disposable formwork that prevents damage to the beam cross section and prevents the beam side formwork from falling when demolding. The purpose is to provide plates.

(Means for solving the problem) The deck plate of the present invention to solve the above problem has a flat upper surface of the metal floor plate and a triangular hollow rib at the bottom that is closed at both ends in the longitudinal direction. In the deck plate, two notches are formed in the floorboard at positions other than the closing rib at both ends of the deck plate in the longitudinal direction so as to approach each other inwardly from the edge at a constant interval. It is characterized by:

(Function) When the deck plate configured as described above is used as a disposable formwork for concrete deck slabs, it is supported by placing both longitudinal ends on the upper edge of the beam side formwork and the timbers, and then Pull up the part between the notches to form a dovetail-shaped protrusion. Then, by arranging reinforcing bars in the beam side formwork and pouring concrete, the dovetail protrusions are anchored in the concrete and act as anchors. Therefore, even if the beams are removed and the beam side formwork is removed, the deck plate will not fall.

(Embodiment) An embodiment of the deck plate according to the present invention will be explained with reference to Fig. 3. The deck plate 3 is a metal floor plate with a flat upper surface 1 and a triangular hollow rib 2 at the bottom, both ends of which in the longitudinal direction are crushed and closed.
At both longitudinal ends of the deck plate 3, in the floor plate at a position other than the blocking rib, two cuts 8 are formed close to each other at a fixed interval from the end edge toward the inside.

When using the deck plate 3 constructed in this way as a disposable formwork for concrete slabs, both longitudinal ends of the deck plate 3 are connected to the upper edge of the beam side formwork 5 and the upper edge of the beam side formwork 6, as shown in FIG. It is supported by placing it on a concrete plate, and before pouring concrete, the part between the two notches 8 is pulled upward to form a dovetail-shaped protrusion 9. Then, as shown in FIG. 5, reinforcing bars 10 are arranged within the beam side formwork 5, and then concrete 7 is poured. In this way, the dovetail-shaped protrusion 9 bites into the concrete 7, and when the concrete 7 hardens, the dovetail-shaped protrusion 9 is locked to the concrete 7 and acts as an anchor. Therefore, even if the timbers 6 are removed and the beam side formwork 5 is demolded, the deck plate 3 will not fall.

(Effect of the invention) As can be seen from the above explanation, the deck plate of the present invention has two notches extending inward from the edge at a constant interval on the floorboard at both ends in the longitudinal direction at positions other than the closing ribs. Because it is formed so that it approaches,
When used as disposable formwork for concrete slabs,
Supporting both longitudinal ends of the deck plate on the beam side formwork and timber, pulling up the part between the two cuts to form a dovetail-shaped protrusion, and then pouring concrete. As a result, the dovetail-shaped protrusion is locked in the concrete and acts as an anchor, so the deck plate will not fall even if the timbers and beam side formwork are removed after the concrete has hardened.
Therefore, there is a significant contribution to be made to improving the safety of concrete slab construction work.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway perspective view of a conventional deck plate used as a formwork for concrete slabs, Figure 2 is a sectional view showing how this deck plate is used, and Figure 3 is a disposable formwork for concrete slabs. FIG. 4 is a partially cutaway perspective view of the deck plate of the present invention used as a formwork, FIG. 4 is a partially cutaway perspective view showing the deck plate before use, and FIG. 5 shows the deck plate in use FIG. 1...Top surface of metal floorboard, 2...Hollow rib, 3
...Deck plate, 8...Notch, 9...Dovetail-shaped protrusion.

Claims (1)

[Scope of utility model registration request] In a deck plate where the upper surface of the metal floor plate is flat and the triangular hollow ribs at the bottom are closed at both ends in the longitudinal direction, a certain amount of pressure is applied to the floor plate at a position other than the closing rib at both ends in the longitudinal direction of the deck plate. A deck plate characterized in that two notches are formed so as to approach each other inwardly from the edge with a gap between them.