JPH0710132U - Floor material for building - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The objective is to obtain a floor structural material with a simple structure and high strength. [Structure] A plurality of lattice lines 4 are erected on the upper surface of a metal plate 4 in parallel, and an upper end metal 5 is fixed to the upper ends of the lattice lines to form a floor structure material. [Effect] Since the metal plate is reinforced by the lattice reinforcement, the buckling strength is improved, and it is possible to withstand construction in a large span.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a floor structure material for a building used in forming a concrete slab by constructing a concrete slab by installing it between beams in a concrete building.

[0002]

[Prior art]

 Conventionally, various structures have been proposed as this type of floor structural material for construction, but it is common to use a flat metal plate with a plurality of trusses that are connected in parallel with each other at the upper end and the lower end by lattices. Is. In recent years, instead of this, a structure was proposed in which a truss structure was omitted and a metal net was laid on the upper surface of a metal plate in which a number of deep concave grooves such as a keystone plate were juxtaposed and used as a floor structural material for construction. in use.

[0003]

[Problems to be solved by the device]

 In the case of a floor structural material that uses a metal plate with a large number of deep recessed grooves arranged side by side, such as the keystone plate, the structure is such that all the loads of the poured concrete are supported by the recessed grooves. The metal plate must be thicker than that, and even if a thick metal plate is used, it cannot be used for a large span of about 4 m, for example.

[0006]

[Means for Solving the Problems]

 The present invention solves the above-mentioned problems by constructing a plurality of lattice lines in parallel with each other on the upper surface of a metal plate, and fixing the upper end line to the upper end of the lattice line to form a building floor structure material. Is. The invention of claim 2 uses a flat plate having ribs in the longitudinal direction as the metal plate, and the lattice lines are fixed to the ribs. The invention of claim 3 uses the metal plate as a longitudinal plate such as a keystone plate. It uses one having a large number of grooves in the direction. A fourth aspect of the present invention is to prevent buckling of the metal plate by arranging a plurality of bending muscles in parallel at right angles to the lattice muscles and fixing the bending muscles to the upper end muscles and the metal plate.

[0007]

[Action]

 In this invention, since the lattice reinforcement is erected on the upper surface of the metal plate and the upper end reinforcement is fixed to the upper end of the lattice reinforcement, the metal plate is reinforced by the upper reinforcement and the strength of the cast concrete against the load is improved. When the lattice streak is fixed to the rib of the metal plate as in the second aspect, the rib of the metal plate functions as the lower end streak of the truss, and the strength is further improved. When a metal plate having a deep groove such as a keystone plate is used as in the invention of claim 3, the shortage of stress, which is a drawback of the conventional composite deck, is compensated by the upper end streak. Even if a thin plate with a thickness of about 0.5 mm is used, sufficient strength can be obtained and it can be used in a large span.

[0008]

Embodiment 1 In FIGS. 1 and 2, a keystone plate having a large number of deep grooves 2 arranged in the longitudinal direction is used as a metal plate 1, and a lower end of a lattice streak 4 is provided on an upper surface of a convex portion 3 of the metal plate 1. A plurality of lattice muscles 4 are erected parallel to each other by fixing the bent portions by welding, and the upper end muscles 5 are fixed by welding to the upper end bent portions of each lattice muscle 4. A plurality of bending rebars 6 are arranged on the upper surface of the metal plate 1 at right angles to the upper end bars 5 at equal intervals. The lower bent part of the bent rebar 6 is located on the metal plate 1 and the upper bent part is located on the upper end bar 5. It is fixed by welding. The bending rebar 6 is for preventing buckling of the metal plate 1 when pouring concrete. In the figure, reference numeral 7 is an end reinforcing bar, which may be a linear shape as shown in the figure, or a crank shape depending on the use conditions. Reference numeral 8 is a beam material.

In the above embodiment, since the keystone plate is used as the metal plate 1, the bending strength of the metal plate 1 itself is high. Since the lattice reinforcement 4 and the upper end reinforcement 5 are fixed there, the synergistic effect of the concave groove 2 of the metal plate 1 and the upper end reinforcement 5 surpasses the floor structural material in which the truss is erected on the conventional flat iron plate. Is obtained. Also, unlike the conventional structure in which a metal net is laid on the keystone plate, the keystone plate is reinforced by the upper end streak 5, so it is not necessary to thicken the iron plate of the keystone plate, and a thin iron plate of about 0.5 mm is sufficient. It is strong and can withstand large spans.

In the above embodiment, the lattice line 4 is fixed to the upper surface of the convex portion 3 of the metal plate 1, but the lattice line 4 may be fixed to the upper surface of the bottom of the concave groove 2. It is also possible to use a deck plate (composite deck) or corrugated plate instead of the keystone plate as the metal plate. Furthermore, if a reinforcing bar 9 parallel to the upper end reinforcing bar 5 is fixed to an appropriate position of the bending reinforcing bar 6, the strength of the single layer can be improved. Further, it is conceivable that the metal plate 1 is provided with a truss composed of a lower end reinforcement, a lattice reinforcement, and an upper end reinforcement.

[0011]

Second Embodiment In the embodiments of FIGS. 3 and 4, a flat iron plate with ribs is used as the metal plate 1. A large number of ribs 11 are formed on the metal plate 1 at equal intervals in the longitudinal direction, and the lower end bent portion of the lattice muscle 4 is fixed on the rib 11. The other structure is the same as that of the first embodiment. Also in this embodiment, the metal plate 1 is reinforced by the upper end streak 5. Since the lattice reinforcements 4 are fixed on the ribs 11, the ribs 11 correspond to the lower end reinforcements of the truss, and even if there is no lower end reinforcement, it is comparable to a conventional floor structural material in which a truss is erected on a flat iron plate. Strength can be obtained.

In the above embodiment, the lattice muscles 4 were erected vertically, but as shown in FIG. 5, the lattice muscles 4 were erected diagonally and one upper end muscle 5 was replaced by two lattice muscles 4. It can also be a supporting structure. In the case of such a structure, the buckling of the metal plate 1 can be prevented even if the linear reinforcing bar 12 is fixed to the upper end bar 5 instead of the bent reinforcing bar 6 for preventing the buckling of the metal plate 1. can do.

[0013]

EFFECTS OF THE INVENTION According to the present invention, a floor structure material having a simple structure can be obtained because a lattice structure and a top structure are fixed to each other to form a floor structure material instead of a truss having a bottom bar on the upper surface of a metal plate. You can If the metal plate is provided with ribs and the lattice muscles are fixed on the ribs, the ribs function as the lower end reinforcements, so that the reduction in strength due to the absence of the lower end reinforcements can be suppressed as much as possible. . Furthermore, if a metal plate with a deep groove such as a keystone plate that can be used independently as a floor structural material is used, the buckling strength in the longitudinal direction will be obtained due to the synergistic effect of the groove of the metal plate itself and the upper end streak. Becomes extremely large. Therefore, even if the metal plate is thin, it can be used in a large span.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of a second embodiment of the present invention.

FIG. 4 is a side view of the same.

FIG. 5 is a front view of another embodiment of the present invention.

[Explanation of symbols]

 1 Metal Plate 2 Recessed Groove 4 Lattice Muscle 5 Upper End Muscle 6 Bending Rebar 11 Rib

Claims (4)

[Scope of utility model registration request] 1. A floor structure material for building, wherein a plurality of lattice lines are erected in parallel on the upper surface of a metal plate, and upper end lines are fixed to the upper ends of the lattice lines. 2. The floor structure material for building according to claim 1, wherein the metal plate is a flat plate having longitudinal ribs, and the lattice lines are fixed to the ribs. 3. The floor structural material for buildings according to claim 1, wherein the metal plate has a large number of grooves in the longitudinal direction. 4. A plurality of bending muscles are arranged in parallel at right angles to the lattice muscles, and the bending muscles are fixed to the upper end muscles and the metal plate.
The floor structural material for building according to any one of claims 1 to 3.