JPH0624105U - Floor structural material - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to obtain a floor structural material that can withstand a large span. [Structure] A pair of lattice muscles 3a, 3 constituting the truss 2.
Since the upper end of b is joined and the lower end is separated, and the upper end is provided with the reinforcing bar 7 in addition to the upper bar 6, the amount of deformation of the base at the time of placing concrete is reduced, and the seat of the reinforcing bar is reduced. The flexural strength is improved, and the span can be increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a floor structure material used for construction.

[0002]

[Prior art]

 For example, when a plurality of truss members are installed side by side on the board and the floor reinforcement and the formwork are integrated, for example, the truss member joins the upper ends of a pair of opposing lattice reinforcements and the lower end. It is known that they are separated from each other and fixed to the substrate, the upper end portions of the lattice muscles are fixed with the upper end muscles sandwiched therebetween, and the lower end muscles are fixed to the lower portions of the respective lattice muscles.

[0003]

[Problems to be solved by the device]

 In the above conventional floor structural material, the span is limited to about 4 m due to the strength of the reinforcing bar, and many beams are required. Further, in the conventional floor structure material, since there is no support material in the width direction, the substrate is easily bent in the width direction, which hinders handling such as transportation.

[0004]

[Means for Solving the Problems]

 According to the invention, in a floor structural material in which a plurality of truss members are arranged side by side on a substrate, the truss members join the upper ends of a pair of opposing lattice lines and separate the lower ends, and the upper end is It is constructed by arranging and fixing reinforcing bars in addition to the upper end bars (claim 1). Further, the invention of claim 2 is one in which an auxiliary muscle orthogonal to the truss member is arranged below the lattice muscle.

Further, if the height of the auxiliary reinforcement is the same as that of the lower end reinforcement of the truss member between the adjacent truss members, the invention of claim 3 is obtained. In the invention of claim 3, the concrete structure of the truss member does not matter as long as it is a floor structure material in which a plurality of truss members are juxtaposed on the substrate.

[0006]

[Action]

 The reinforcing bar arranged and fixed to the upper portion of the lattice member in this invention in addition to the upper end bar has the functions of reducing the deformation amount of the substrate during concrete pouring and improving the buckling strength of the reinforcing bar. Therefore, it is possible to increase the span. In addition, the auxiliary bar orthogonal to the truss member in the invention of claim 2 prevents the board from bending in the width direction, facilitates the handling, and ensures the stability of the board during the construction of a large span. Furthermore, since the auxiliary bar in claim 3 has the same height as the lower end bar of the truss member between the truss members, the auxiliary bar can be used as a spacer to dispose the reinforcing bar on the truss member, and a large span can be provided. The strength during construction can be further improved.

[0007]

【Example】

 A plurality of truss members 2 are arranged in parallel on the upper surface of a steel plate substrate 1. The truss member 2 has a pair of left and right lattice members 3 and 3a opposed to each other, and the lower portions thereof are bent in parallel with the substrate, and bent portions 4 and 4a are fixed to the substrate by spot welding. The lower end streaks 5 and 5a are fixed to the lower portions of the lattice members 3 and 3a at a predetermined distance from the substrate. An upper end streak 6 is provided between the upper ends of the respective lattice members 3, 3a, and the upper end portions of the respective lattice members 3, 3a are fixed to the upper end streak 5 by welding. A reinforcing bar 7 having the same thickness as the upper end bar 6 is fixed to the outer side of the upper end of one of the lattice members 3.

Auxiliary muscles 8 arranged orthogonal to the truss member are fixed to the lower bent portions 4, 4a of the lattice members 3, 3a by spot welding. The auxiliary bar 8 is bent upward between the adjacent truss members 2, and the height of the upper part thereof is the same as that of the lower end bars 5 and 5a, and a recess 9 for arranging the reinforcing bar is formed.

In this embodiment, the reinforcing bar 7 at the upper end and the auxiliary bar 8 at the lower end are arranged and fixed to the truss member 2, but it is the invention of claim 1 that only the reinforcing bar 7 is arranged. In addition to 7, the lower auxiliary muscle 8 may be arranged and fixed to form the invention of claim 2. Although the above embodiment is the embodiment of claim 3, the reinforcing bar 7 is not essential in the invention of claim 3, and the structure of the truss member is not limited to the above.

According to the above-mentioned embodiment, since the reinforcing bar 7 is arranged at the upper end portion of the truss member, the buckling strength is increased, and a large span of about 6 m, which has been difficult in the past, is possible. By the way, the floor structural material (the size of the substrate 1 is 6 m in length, 2 m in width, and 10 truss members) according to the embodiment of claim 1 in which the auxiliary reinforcement 8 at the lower end is not provided and only the reinforcing reinforcement 7 is provided. Side-by-side support, both ends of lattice reinforcements 3 and 3a diameter 6mm, upper end reinforcement 6, lower end reinforcements 5 and 5a, and reinforcement reinforcement 7 diameter 12mm), 350kg of sand was uniformly placed and the amount of deformation at the center was measured. A value of 32 mm, which is not a problem in practical use, was obtained. In addition, when an experiment was conducted without reinforcing bars on one side, when buckling 450 kg of sand and smoothing the surface, buckling started from the reinforcing bar ends. From this result, it can be seen that the reinforcing bar 7 greatly contributes to the prevention of buckling.

In the above embodiment, since the auxiliary muscle 8 at the lower end is bent upward, the auxiliary muscle 8 functions as a spacer when arranging the reinforcing bars. In particular, if the concave portion 9 is formed, the reinforcing bar 10 can be stabilized in the concave portion 9 and the work of disposing the reinforcing bar 10 becomes easy. The strength can be further improved by disposing the reinforcing bars 10.

In the above embodiment, the upper reinforcement 6 is sandwiched between the upper ends of the pair of lattice members 3 and 3a and the reinforcing reinforcement 7 is arranged outside. 3a may be provided outside (FIG. 3), or both may be provided inside (FIG. 4). It is also possible to arrange two reinforcing muscles (Fig. 5).

[0013]

[Effect of device]

 According to this invention, since the reinforcing bar or the auxiliary bar is arranged in the truss member constituting the floor structure material, the strength of the floor structure material can be improved. In particular, according to the invention of claim 1, since the reinforcing bar is arranged and fixed to the upper end of the truss member, the buckling strength is improved, it is possible to use it for a large span, and the beam of the building is reduced. You can Further, in the invention of claim 2, in addition to the above, an auxiliary streak is arranged and fixed at the lower end, so that the substrate can be prevented from bending and the substrate is stable even in a large span.

Further, according to the invention of claim 3, since the reinforcing bar is bent upward, the reinforcing bar can be used as a spacer to further dispose the reinforcing bar, and the strength can be further improved. It

[Brief description of drawings]

FIG. 1 is a perspective view of the embodiment of the invention. FIG. 2 is a perspective view of the same usage state. FIG. 3 is a front view showing another arrangement mode of the reinforcing bars. FIG. 4 is a front view showing yet another arrangement mode of reinforcing bars. FIG. 5 is a front view of an embodiment similarly having two reinforcing bars.

[Explanation of symbols]

 1 Substrate 2 Truss member 3 Lattice material 3a Lattice material 5 Lower end bar 5a Lower end bar 6 Upper end bar 7 Reinforcing bar 8 Auxiliary bar 9 Recess

Claims (3)

[Scope of utility model registration request] 1. A floor structure material having a plurality of truss members arranged side by side on a substrate, wherein the truss members join the upper ends of a pair of opposed lattice lines and separate the lower ends thereof, and the upper ends are Floor structure material composed of upper end reinforcements and reinforcement reinforcements 2. The floor structure material according to claim 1, wherein auxiliary ribs that are orthogonal to the truss members are disposed and fixed to the lower portion of the lattice muscles. 3. A floor structure material in which a plurality of truss members are arranged side by side on a substrate, and auxiliary muscles orthogonal to the truss members are disposed and fixed to the lower part of lattice muscles constituting the truss members, and the auxiliary muscles are adjacent to each other. Floor structure material with the same height as the lower end bar of the truss member between the truss members