JP3853237B2 - Hollow slab unit with truss rebar - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a hollow slab unit with a truss reinforcing bar used when forming a hollow slab such as an apartment house.
[0002]
[Prior art]
As a hollow slab unit with this kind of truss reinforcing bar, disclosed in JP 2001-317147 A, as shown in FIG. The elongated void form 2 is disposed between the truss reinforcing bars 10, and the upper reinforcing bars 3 and the lower reinforcing bars 4 in the parallel direction of the truss reinforcing bars 10 are welded to the truss reinforcing bars 10, and the truss reinforcing bars 10 are triangular. One upper main reinforcing bar 11 and two lower main reinforcing bars 12 are arranged at the positions of the respective long sides of the columnar shape, and oblique reinforcing bars 13 are provided between the upper main reinforcing bar 11 and both lower main reinforcing bars 12, respectively. The oblique reinforcing bars 13 are formed in a waveform that rises diagonally from the lower end, bends at the upper end and repeats standing at the lower end, and is welded to the upper main reinforcing bar 11 and the lower main reinforcing bar 12 at the upper end and the lower end, respectively. There is.
[0003]
[Problems to be solved by the invention]
The hollow slab unit with a truss rebar described in the above publication has a curved belt or a member other than the members constituting the triangular column-shaped truss rebar 10 such as the upper and lower reinforcing bars 3 and 4 and the oblique reinforcing bar 13 for fixing the void form 2. A holding member such as a strip is used. These holding members are merely for fixing the void form 2, and do not bear the strength of the slab like the upper and lower reinforcement bars 3, 4 and the triangular columnar truss reinforcing bars 10. For this reason, the material cost of the holding member and the attachment work cost are added to the conventional hollow slab unit with truss reinforcement, and the cost is high. Today, where cost reduction is called out, the hollow slab unit with truss reinforcement is no exception.
[0004]
This invention makes it a subject to fix a void formwork with members other than the said holding member.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention focuses on the fact that an object can be fixed if it is supported at three points, and the void formwork is fixed by the upper reinforcement bar and both truss reinforcing bars. The diagonal rebars of adjacent triangular columnar truss reinforcing bars have a V-shape approaching downward, and if a void form is fitted in the inside, the movement to the left and right and below is prevented, and the upper reinforcement has a void form. If the upper surface is pressed, the upward movement is prevented. That is, the void form is fixed by the upper reinforcing bar and the oblique reinforcing bar which bear the strength of the slab.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
As an embodiment of the present invention, triangular column truss reinforcing bars are arranged in parallel, and long void molds are arranged between the truss reinforcing bars. In the hollow slab unit with a truss reinforcing bar in which the reinforcing bar is fixed to the truss reinforcing bar, the truss reinforcing bar has one upper main reinforcing bar and two lower main reinforcing bars arranged at the positions of the long sides of the triangular column shape, and the upper A diagonal reinforcing bar is provided between the main reinforcing bar and the lower main reinforcing bar. The diagonal reinforcing bar has a waveform that rises diagonally from the lower end, bends at the upper end, and repeats rising at the lower end, and the upper end and the lower end. The void main frame is welded to the upper main reinforcing bar and the lower main reinforcing bar, respectively, and the lower side of the void form frame is in contact with the oblique reinforcing bar of the adjacent truss reinforcing bar and the upper surface is in contact with the upper reinforcing bar, By contact of 3 points It may employ a structure which is fixed between the truss rebar Te.
[0007]
【Example】
FIG. 5 to FIG. 13 show an embodiment. In this embodiment, triangular prism truss reinforcing bars 10 are arranged in parallel on a rectangular iron plate 1, and a pipe-shaped void form 2 is provided between the truss reinforcing bars 10. The upper reinforcing bar 3 and the lower reinforcing bar 4 in the parallel direction of the truss reinforcing bar 10 are welded to the upper and lower parts of the truss reinforcing bar 10. Instead of welding, fastening with a number wire can be employed.
[0008]
The triangular columnar truss reinforcing bar 10 has one upper main reinforcing bar 11 and two lower main reinforcing bars 12, 12 arranged at the positions of the long sides of the triangular columnar shape, and the upper main reinforcing bar 11 and the lower main reinforcing bars 12. The inclined reinforcing bars 13 are respectively provided between them. The oblique reinforcing bars 13 are inclined from the lower end, bend at the upper end, and have a waveform that repeats standing at the lower end, and are welded to the upper main reinforcing bar 11 and the lower main reinforcing bar 12 at the upper end and the lower end, respectively. Further, the lower end of the oblique reinforcing bar 13 is welded to the iron plate 1, and the truss reinforcing bar 10 is integrated with the iron plate 1.
[0009]
The void form frame 2 is in contact with the oblique reinforcing bar 13 of the adjacent truss reinforcing bar 10 on both sides of the lower side thereof, and the upper surface thereof is in contact with the upper reinforcing bar 3, and the truss is brought into contact with the three points 13a, 13a and 3a. It is fixed between the reinforcing bars 10 and 10 (see FIG. 8). For this reason, the void mold 2 is fixed simultaneously with the assembly of the muscles 10 and 3. In the embodiment, the lower surface of the void form 2 is in contact with the lower reinforcement 4 and is also supported by the lower reinforcement 4.
[0010]
Both ends of the upper and lower main reinforcing bars 11, 12 protrude from the iron plate 1, and a pair of swash plate pieces 5 are provided obliquely downward and welded from the protruding portion of each upper main reinforcing bar 11.
[0011]
This embodiment has the above-described configuration, and is used when making the hollow slab S of an apartment house shown in FIG. That is, as shown in FIGS. 2 to 4, the required number of units U is arranged between the H-shaped steels 6 forming the columns (beams) on each floor of the frame. At that time, as shown in FIG. 2, each unit U is fixed by mounting and welding the swash plate piece 5 on the H-shaped steel 6.
[0012]
As shown in FIG. 3, when the arrangement of the unit U is completed, concrete C is placed thereon to construct a hollow slab. At this time, the iron plate 1 is a discarded formwork. In the figure, 7 is a concrete panel.
[0013]
This unit U can be the one excluding the iron plate 1, and in that case, a floor formwork is provided separately. The void mold 2 may employ a spiral pipe, a resin pipe, a foamed resin solid pipe, or the like instead of the steel pipe.
[0014]
【The invention's effect】
As described above, according to the present invention, the void formwork is fixed in the unit by the three-point support by the members constituting the triangular columnar truss reinforcing bars such as the upper and lower reinforcing bars and the oblique reinforcing bars, so that the cost of the unit is reduced. Can be planned.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a construction example of a hollow slab according to one embodiment. FIG. 2 is a cutaway front view of the main part of the construction example. FIG. 3 is an explanatory diagram of an arrangement of the embodiment of the construction example. FIG. 5 is a plan view of the embodiment. FIG. 6 is a front view of the embodiment. FIG. 7 is a bottom view of the embodiment. FIG. 8 is a right side view of the embodiment. 5 is a cross-sectional view taken along the line AA in FIG. 5. FIG. 10 is an enlarged view of BB and CC in FIG. 5. FIG. 11 is an enlarged view of DD and EE in FIG. Enlarged view [Fig. 13] GG, HH enlarged view of Fig. 9 [Explanation of symbols]
1 Iron plate 2 Void formwork (pipe)
3 Upper Reinforcement 4 Lower Reinforcement 5 Swash Plate 6 H-Shaped Steel 10 Triangular Column Truss Reinforcement 11 Upper Main Reinforcement 12 Lower Main Reinforcement 13 Oblique Reinforcement C Concrete S Hollow Slab

Claims (1)

The triangular column-shaped truss reinforcing bars 10 are arranged in parallel, the elongated void form 2 is arranged between the truss reinforcing bars 10, and the upper reinforcing bars 3 and the lower reinforcing bars 4 in the parallel direction of the truss reinforcing bars 10 are arranged. In the hollow slab unit U with truss rebar fixed to the truss rebar 10,
The truss reinforcing bar 10 has one upper main reinforcing bar 11 and two lower main reinforcing bars 12, 12 arranged at the positions of the long sides of the triangular prism shape, and between the upper main reinforcing bar 11 and both lower main reinforcing bars 12. Each of the oblique reinforcing bars 13 is provided with a diagonal reinforcing bar 13 having a waveform that rises obliquely from the lower end, bends at the upper end, and further repeats standing at the lower end, and the upper main reinforcing bar 11 and the lower end at the upper end and the lower end. Each welded to the main rebar 12
The void form frame 2 is in contact with the oblique reinforcing bar 13 of the triangular column-shaped truss reinforcing bar 10 on both sides of the lower side thereof, and the upper surface thereof is in contact with the upper reinforcing bar 3. A hollow slab unit with truss reinforcement, which is fixed to

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