JPH08189123A - Floor structural material for building - Google Patents

Abstract

PURPOSE: To obtain a simple structure but a firm floor structure. CONSTITUTION: A plurality of protrusions 2 are parallelly erected on the upper face of a metallic plate 1. The lower ends of lattice reinforcements 3 are fixed with the side face of the protrusions 2 and the upper end reinforcements 4 are fixed at the upper end of the lattice reinforcements 3. As the protrusions 2 work as the lower end reinforcements of the truss, a strength which can cope with a large span, can be obtained without arrangement of the lower end reinforcements.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structural material for a building used in a concrete building when it is installed between beams and concrete is laid on the beams to form a concrete slab.

[0002]

2. Description of the Related Art Conventionally, various structures have been proposed as this type of building floor structural material, but a plurality of trusses in which upper end bars and lower end bars are connected by lattice lines are erected in parallel on a metal plate. Things are common. In recent years, instead of this, a structure in which a truss structure is omitted and a metal net is laid on the upper surface of a metal plate in which a number of deep ridges such as a keystone plate are juxtaposed and used as a floor structural material for construction is proposed and used Has been done.

[0003]

In a floor structure material using a metal plate in which a large number of deep ridges are arranged side by side, such as the keystone plate, since the structure is such that all the load of the cast concrete is supported by the ridges. The metal plate must be thicker than the floor structural material to which the truss is connected, and even if a thick metal plate is used, it cannot be used for a large span of about 4 m, for example.

[0004]

The floor structure material of the present invention comprises:
A plurality of ridges are erected parallel to each other on the upper surface of the metal plate, the lower end of the lattice is fixed to the side surface of the ridge, and the upper end is fixed to the upper end of the lattice. As a specific structure of the lattice muscles, the lattice muscles are arranged perpendicularly to the surface of the metal plate, and one upper end muscle is fixed to the upper end of each lattice muscle (claim 2). Two sets are arranged so as to be opposed to each other and one common upper end line is fixed to the upper end of two lattice lines forming one set (Claim 3), and the lattice line is the lower end. For example, there is one in which the bent portion is bent in a plane wave shape, and the adjacent lower ends of the lattice muscles are fixed to side surfaces having different ridges (claim 4).

The shape of the ridge is not particularly limited, but is generally I-shaped or rectangular in cross section (claim 5). Further, it is preferable that the projection has a projection for spot welding with a lattice line on the outer side (claim 6), and the height of the projection is 1/3 to 1/8, and generally 20 to 20. 40 mm
Is preferred (Claim 7). Then, 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 to improve the strength (claim 8).

[0006]

In the present invention, since the convex strip is formed on the upper surface of the metal plate and the lattice streak is fixed to this convex strip, the convex strip of the metal plate functions as the lower end streak of the truss. Therefore, it is possible to obtain the same strength as a floor structural material in which a truss is arranged on a conventional flat iron plate without arranging the lower end streak, and the metal plate is 0.5 mm.
Sufficient strength is obtained even if a thin object is used,
It can also be used in a large span. Also, because the welded parts are all covered with cast concrete and do not touch the outside air,
There is no risk of corroded welds.

According to the third aspect of the invention, two lattice muscles are provided.
If the structure is such that one upper end muscle is supported, the lattice can be prevented from tilting and buckling. In addition, when the lattice muscles are bent in a plane wave shape as in the invention of claim 4, a function corresponding to the two lattice muscles can be obtained by one lattice muscle. If the protrusion is provided on the outer side of the convex strip as in the invention of claim 6, spot welding of the lattice can be performed easily and surely. When the height of the ridge is 1/3 to 1/8 of the height of the lattice muscle as in the invention of claim 7, the ridge functions as a spacer when arranging the reinforcing muscles. By fixing the bending muscle perpendicular to the lattice muscle as in the eighth aspect of the invention, the inclination and the buckling of the lattice muscle can be prevented more reliably.

[0008]

Embodiment 1 In the embodiment of FIGS. 1 and 2, the metal plate 1
A large number of ridges 2 having an I-shaped cross section are formed in parallel on the upper surface of the ridge 2, and the lower end of the lattice 3 is fixed to one side surface of the ridge 2 by spot welding. An upper end streak 4 is fixed to the upper end bent portion of the lattice streak 3,
The ridge 2 and the upper end streak 4 substantially form a truss. A bending line 5 is arranged at a right angle to the lattice line 3 and the upper line 4, and the bending line 5 is fixed to the metal plate 1 and the upper line 4. The height of the ridge 2 is 1/3 to 1/8 of the height of the lattice muscle (the height of the lattice muscle is 120).
If the height of the ridge is 20 to 40 mm),
It can be used as a spacer when the reinforcing bar 7 is arranged. Further, a projection 8 for spot welding is formed on the lattice-streak fixing portion of the ridge 2. The bending streak 5 is for preventing tilting of the lattice streak 3 and buckling of the metal plate 1 at the time of placing concrete. However, since the lattice streak 3 is fixed to the side surface of the ridge 2, the bending streak 5 There is little risk of tilting even without disposing the flexor 5, and the flexor 5 can be omitted. In the figure, reference numeral 9 is an end reinforcing bar, which may have a straight shape as shown in the drawing, or may have a crank shape depending on usage conditions. Reference numeral 10 is a beam material.

[0009]

[Embodiment 2] In the embodiment shown in FIGS. 3 and 4, the ridges have a rectangular cross section, and the lattice streaks are fixed to a so-called keystone plate-shaped metal plate. In FIG.
A plurality of wide ridges 2 having a rectangular cross section are formed on the metal plate 1 at equal intervals, and the side surfaces of the ridges 2 are vertical. The ridge 2
The lower portions of the lattice muscles 3 are fixed by spot welding to the left and right sides of the upper and lower ends, respectively, and the upper end muscles 4 are fixed to the upper ends of the lattice muscles 3. The width of the ridge 2 is appropriately selected according to the standing interval of the lattice lines 3. Although not shown, a bending muscle can be arranged at right angles to the upper end muscle 4 if necessary. Further, a linear reinforcing bar 11 orthogonal to the upper end bar 4 may be fixed and reinforced instead of the bending bar. FIG.
In this case, the lattice muscle 3 is fixed to only one side of the ridge 2 having a rectangular cross section. 3 and 4, the height of the ridge 2 is 1/3 to 1/8 of the height of the lattice muscle (the height of the ridge is 20 to 40 mm when the height of the lattice muscle is 120 mm).
As a result, it can be used as a spacer when the reinforcing bar 7 is arranged.

[0010]

[Embodiment 3] In the embodiment of FIG. 5, a convex strip 2 having a trapezoidal cross section is formed on a metal plate 1, and the lower end portions of two pairs of lattice lines 3 and 3 are fixed to both sides of the convex strip 2. Then, the two lattice muscles are opposed to each other and are erected obliquely, and one upper end muscle 4 is fixed to the two lattice muscles 3 and 3. Even in such a structure, the buckling strength of the metal plate 1 can be further improved by fixing the linear reinforcing bar 11 to the upper end bar 4. It is also possible that the convex stripes 2 are not trapezoidal and the side surfaces thereof are vertical, and the lower portion of the lattice muscle 2 is bent as shown in FIG.

[0011]

[Embodiment 4] In the embodiment of FIG. 6, two ridges 2 each having an I-shaped cross section formed on a metal plate 1 and two ridges 2 as one set are bent at the bottom of each ridge. The lower end portions of the latticed muscles 3 and 3 forming a set are fixed, and the upper end muscles 4 are fixed to the upper ends of the two latticed muscles 3 and 3. Also in the above-described Examples 3 and 4, the height of the ridge 2 is such that it can be used as a spacer for the reinforcing bar 7 (see FIG. 1).

[0012]

Fifth Embodiment FIGS. 8 to 12 relate to the invention of claim 4. 8 to 10, a plurality of ridges 2, 2a having an I-shaped cross section are formed in parallel on the metal plate 1.
The ridges 2, 2a are set as a set of two and are inclined in the facing direction, and the lower end of the lattice muscle 3 is fixed to the inside (opposing surface) of each ridge 2, 2a. Upper streak 4 at the upper end
Is stuck. The lattice muscles 3 are bent in a plane wave shape (see FIG. 8) with the lower end portion being the bending position, and the adjacent bent lower end portions are fixed to different ridges. That is,
The bent lower end portion 3a is fixed to the ridge 2a, and the adjacent bent lower end portion 3b is fixed to the other ridge 2. In this structure, the upper end streak 4 can be supported in a triangular shape by one lattice streak 3 and the buckling strength is improved. As shown by a chain line in FIG. 8, two lattice muscles 3 may be arranged so as to intersect with each other to further improve the strength. In this case, 2
It is preferable that the two lattice muscles are arranged so as to be slightly displaced so that the upper ends of the two lattice muscles are both fixed to the upper muscle 4.

FIG. 11 shows a set of ridges 2 and 2a having an I-shaped cross section.
In addition, the wiring cylinder 16 is fixed instead of the lattice muscle. This wiring cylinder 16 has a structure in which legs 16b are connected to a lower portion of a cylindrical portion 16a extending in the front-rear direction in FIG. 11, and a telephone line or the like is wired in the cylindrical portion 16a. Here, the lower end horizontal portion of the leg 16b is sandwiched and fixed by the ridges 2 and 2a. Further, in this embodiment, the bent lower end portion of the lattice muscle 3 bent in a plane wave shape is fixed to the outside of the ridges 2 and 2a having an I-shaped cross section.

In FIG. 12, the bent lower end portions of the bent lattice muscles 3 are fixed to both side surfaces of the ridge 2 having a trapezoidal cross section.

In each of the above embodiments, the height of the ridge 2 is ⅓ to ⅛ of the height of the lattice muscle 3 so that the ridge 2 can be used as a spacer when arranging the reinforcement. It is not an essential requirement to have a high height. Further, a reinforcing bar 12 parallel to the upper end bar 4 is provided at an appropriate position of the bending reinforcing bar 5.
By fixing (see FIG. 1), the strength can be further improved. Further, as shown in FIG. 7, it is also possible to prevent buckling by connecting the upper end streaks 4 adjacent to each other in each of the above-described embodiments with the bending streaks 15.

[0016]

EFFECTS OF THE INVENTION According to the present invention, a floor structure material having a simple structure can be obtained because the lattice structure and the upper end structure are fixed to each other to form a floor structure material instead of a truss having a lower end bar on the upper surface of a metal plate. You can Then, since the lattice streak is fixed to the side surface of the convex streak provided on the metal plate, the convex streak functions as the lower end streak, so that it is possible to obtain the same strength as that when the truss is erected on the flat iron plate. It is possible, and the strength does not decrease without the lower end streak. Therefore, even if the metal plate is thin, it can be used in a large span. Further, since the lattice muscles are fixed to the side surfaces of the convex stripes, the standing state can be stably maintained without reinforcing the bending muscles, and the arrangement of the bending muscles can be omitted. Moreover, since the welded portion is covered with the cast concrete and does not come into contact with the outside air, there is no risk of corrosion of the welded portion. Furthermore, if the metal plate has a ridge with a square cross section such as a keystone plate and can be used alone as a floor structural material, the seat ridge in the longitudinal direction will be created by the synergistic effect of the ridge and the upper end streak of the metal plate itself. The flexural strength becomes extremely large.

[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 the second embodiment of the present invention.

FIG. 4 is a front view of another aspect of the second embodiment.

FIG. 5 is likewise a front view of the third embodiment.

FIG. 6 is a front view of the fourth embodiment of the present invention.

FIG. 7 is a plan view showing a connecting portion of an embodiment in which upper end muscles are also connected by flexion muscles.

FIG. 8 is a plan view of the fifth embodiment of the same.

FIG. 9 is a front view of the same.

FIG. 10 is a sectional view taken along line AA of FIG.

FIG. 11 is a front view of the same modified example.

FIG. 12 is a front view of an embodiment in which the ridge has a trapezoidal cross section.

[Explanation of symbols]

 1 metal plate 2 convex stripe 3 lattice muscle 4 upper end muscle 5 flexion muscle 7 reinforcement muscle 8 protrusion

Claims (8)

[Claims] 1. A construction in which a plurality of ridges are erected in parallel on an upper surface of a metal plate, a lower end portion of a lattice line is fixed to a side surface of the ridge, and an upper end line is fixed to an upper end of the lattice line. Floor structural material 2. The floor structural material for a building according to claim 1, wherein the lattice reinforcements are arranged perpendicular to the surface of the metal plate, and one upper end reinforcement is fixed to the upper end of each lattice reinforcement. 3. The building floor according to claim 1, wherein two pairs of lattice reinforcements are arranged so as to face each other so as to be inclined to each other, and one upper end reinforcement is fixed to the upper ends of the one pair of lattice reinforcements. Structural material 4. The floor structural material for a building according to claim 1, wherein the lattice muscle is bent in a plane wave shape with its lower end portion being a bending position, and the adjacent lower end portions of the lattice muscles are fixed to side surfaces having different ridges. 5. The ridge has an I-shaped cross section or a rectangular shape.
The floor structure material for building according to any one of claims 1 to 4. 6. The building floor structure material according to claim 1, wherein the projection has a projection for spot welding with a lattice line formed on the outside. 7. The building floor structural material according to claim 1 or 2, wherein the ridge has a height of 1/3 to 1/8 of the height of the lattice muscle. 8. 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 structure material for building according to any one of claims 1 to 4.