JP2003268912A - Hollow slab unit with truss rod - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the cost of a hollow slab unit. <P>SOLUTION: In the hollow slab unit U with truss rods, a hollow pipe void form 2 is arranged between parallelly arranged triangular truss rods 10 and upper arranged rods 3 and lower arranged rods 4 crossing at right angles the truss rods 10 are welded to the truss rods 10. The truss rods 10 are comprised of one upper main rod 11, two lower main rods 12, and respective wavelike oblique rods 13 between both main rods. Respective rods are mutually welded to each other. Both lower sides of the void forms 2 are brought into contact with the respective oblique rods 13 of adjacent truss rods 10 and the upper face is brought into contact with the upper arranged rods 3 and fixed between the truss rods 10. By the contact with the three points 3a, 13a, 13a, the lateral and vertical movement of the void form 2 is restricted by the three point support and fixed in the unit U by the upper arranged rods 3 and both oblique rods 13 bearing the strength of the slab. The unit U has the iron plate 1 at the underface, and the iron plate forms the permanent form. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow slab unit with truss reinforcement used for forming a hollow slab of an apartment house or the like. 2. Description of the Related Art As a hollow slab unit with a truss reinforcing bar of this type, a triangular prism-shaped truss reinforcing bar 10 is disclosed in Japanese Patent Application Laid-Open No. 2001-317147, as shown in FIG. And the long void formwork 2 is disposed between the truss reinforcing bars 10, and 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 truss reinforcing bar 10. The truss reinforcing bar 10 is provided with one upper main reinforcing bar 11 and two lower main reinforcing bars 12 at the positions of the respective long sides of the triangular prism, and between the upper main reinforcing bar 11 and both lower main reinforcing bars 12, respectively. The oblique reinforcing bar 13 is provided, and the oblique reinforcing bar 13 has a waveform that rises obliquely from the lower end, bends at the upper end, and repeats the rising at the lower end, and has the upper main reinforcing bar 11 and the lower main reinforcing bar at the upper and lower ends. Each is welded to the reinforcing bar 12 There are things. [0003] The hollow slab unit with a truss reinforcing bar described in the above-mentioned publication has a void form 2
In order to fix the truss, a holding member such as a belt or a curved strip other than the members constituting the triangular prismatic truss reinforcing bar 10 such as the vertical reinforcing bars 3 and 4 and the oblique reinforcing bar 13 is used. These holding members are merely for fixing the void formwork 2 and do not bear the strength of the slab like the reinforcing bars such as the vertical reinforcing bars 3 and 4 and the triangular prism truss reinforcing bar 10. For this reason, the conventional hollow slab unit with a truss reinforcing bar is added to the material cost of the holding member and the mounting operation cost, resulting in an increase in cost. Today, when cost reduction is called for, hollow slab units with truss reinforcements are no exception. [0004] It is an object of the present invention to fix the void form with a member other than the holding member. [0005] In order to solve the above problems, the present invention focuses on the fact that the object can be fixed if it is supported at three points. They decided to fix the formwork. The diagonal reinforcing bars of the adjacent triangular prism-shaped truss reinforcing bar form a V-shape approaching downward, and if a void form is fitted into it, movement to the left, right, and downward is prevented, and the upper form of the void form Pressing the upper surface prevents upward movement. That is, the void formwork is fixed by the upper reinforcement and the two oblique reinforcing bars that bear the strength of the slab. As an embodiment of the present invention, a triangular prism truss reinforcing bar is arranged in parallel, and a long void formwork is arranged between the truss reinforcing bars. In a hollow slab unit with a truss reinforcing bar in which upper and lower reinforcing bars in the parallel direction are welded to the truss reinforcing bar, the truss reinforcing bar has one upper main reinforcing bar and two A lower reinforcing bar is arranged and a diagonal reinforcing bar is provided between the upper main reinforcing bar and both lower main reinforcing bars,
The oblique rebar has a waveform that rises obliquely from the lower end, bends at the upper end, and repeats rising at the lower end, and is welded to the upper main rebar and the lower main rebar at the upper end and the lower end, respectively, and the void form Can adopt a configuration in which both lower sides of the truss reinforcing bars abut against the oblique reinforcing bars of the adjacent truss reinforcing bars, and the upper surface thereof abuts on the upper reinforcing bars, and is fixed between the truss reinforcing bars by the three points of contact. FIG. 5 to FIG. 13 show an embodiment. In this embodiment, a triangular prism-shaped truss reinforcing bar 10 is arranged in parallel on a rectangular iron plate 1 and the truss reinforcing bars 10 The upper and lower reinforcing bars 3 and 4 of the truss reinforcing bar 10 are welded to the upper and lower portions of the truss reinforcing bar 10, respectively. Instead of welding, fastening by a number line or the like can be adopted. The triangular prism-shaped truss reinforcing bar 10 has one upper main reinforcing bar 11 and two lower main reinforcing bars 12, 12 at the positions of the respective long sides of the triangular columnar shape. Oblique reinforcing bars 13 are provided between the reinforcing bars 12, respectively. The oblique reinforcing bar 13 has a waveform that rises obliquely from the lower end, bends at the upper end, and repeats rising 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. 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. The lower part of the void form 2 is in contact with the oblique reinforcing bar 13 of the adjacent truss reinforcing bar 10 and the upper surface thereof is in contact with the upper reinforcing bar 3.
a, 13a, 3a, the truss reinforcing bars 10, 10
It is fixed in between (see FIG. 8). Therefore, the void form 2 is fixed at the same time when the streaks 10 and 3 are assembled. In the embodiment, the lower surface of the void form 2 is in contact with the lower reinforcing bar 4 and is also supported by the lower reinforcing bar 4. 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 protruded from the protruding portion of each upper main reinforcing bar 11.
Are provided diagonally below and are welded. This embodiment is configured as described above, and is used when making a hollow slab S of an apartment house shown in FIG. In other words, between the H-shaped steel members 6 forming the columns (beams) on each floor of the skeleton, FIG.
As shown in FIG. 4 to FIG. 4, the required number of units U are multiplied and arranged. At that time, as shown in FIG.
Each unit U is fixed by placing the swash plate piece 5 thereon and welding. As shown in FIG. 3, when the arrangement of the unit U is completed, a hollow slab is constructed by casting concrete C thereon. At this time, the iron plate 1 is a discarded formwork. In the figure, 7 is a concrete panel. This unit U can be obtained by removing the iron plate 1, in which case a floor form is separately provided. Also,
As the void form 2, a spiral pipe, a resin pipe, a foamed resin solid pipe, or the like may be used instead of a steel pipe. According to the present invention, as described above, the void formwork is fixed in the unit by three-point support by the members constituting the triangular prismatic truss reinforcing bar such as the vertical reinforcing bars and the oblique bars. Therefore, the cost of the unit can be reduced.

[Brief description of the drawings] FIG. 1 is a schematic view of a construction example of a hollow slab according to one embodiment. FIG. 2 is a cutaway front view of a main part of the construction example. FIG. 3 is a layout explanatory view of an embodiment of the construction example. FIG. 4 is a perspective view of a slab of the construction example. FIG. 5 is a plan view of one 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. 9 is a sectional view taken along line AA of FIG. 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. 6; FIG. 12 is an enlarged view of FF in FIG. 6; FIG. 13 is an enlarged view of GG and HH of FIG. 9; [Explanation of symbols] 1 Iron plate 2 void formwork (pipe) 3 upper reinforcement 4 Lower reinforcement 5 Swash plate pieces 6 H-type steel 10 Triangular prism truss reinforcement 11 Upper main rebar 12 Lower main rebar 13 Oblique bars C concrete S hollow slab

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[Procedure amendment] [Date of submission] April 12, 2002 (2002.4.1
2) [Procedure amendment 1] [Document name to be amended] Description [Item name to be amended] Claims [Amendment method] Change [Contents of amendment] [Claims] [Claim 1] Triangular prism truss reinforcing bar 10 Are arranged in parallel with each other, and the long void formwork 2 is arranged between the truss reinforcing bars 10, and the upper reinforcing bar 3 and the lower reinforcing bar 4 in the parallel direction of the truss reinforcing bar 10 are attached to the truss reinforcing bar 10. In the fixed hollow slab unit U with a truss reinforcing bar, the truss reinforcing bar 10 is provided with one upper main reinforcing bar 11 and two lower main reinforcing bars 12, 12 at the positions of the respective long sides of the triangular prism. The oblique reinforcing bar 13 is provided between the reinforcing bar 11 and both lower main reinforcing bars 12, respectively.
Has a waveform that rises obliquely from the lower end, bends at the upper end, and repeats rising 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. The lower side of the truss reinforcing bar 10 abuts on the oblique reinforcing bar 13 of the adjacent triangular columnar truss reinforcing bar 10 and the upper surface of the truss reinforcing bar 3 is fixed between the truss reinforcing bars 10 by the three points of contact. A hollow slab unit with a truss reinforcing bar. [Procedure amendment 2] [Document name to be amended] Description [Item name to be amended] 0006 [Correction method] Change [Content of amendment] [0006] Embodiments of the present invention include a triangular prism truss. Reinforcing bars are arranged in parallel, and a long void formwork is arranged between the truss bars, and the upper and lower bars in the direction parallel to the truss bars are fixed to the truss bars.
In the constant truss reinforcing bars with hollow slabs unit, said truss rebar, the principal reinforcing bars and both the lower main reinforcing bars together to place one on the main reinforcing bars and two lower main reinforcing bars at the position of the triangular prism shape of each long side Between each of which is provided with diagonal bars,
The oblique rebar has a waveform that rises obliquely from the lower end, bends at the upper end, and repeats rising at the lower end, and is welded to the upper main rebar and the lower main rebar at the upper end and the lower end, respectively, and the void form Can adopt a configuration in which both lower sides of the truss reinforcing bars abut against the oblique reinforcing bars of the adjacent truss reinforcing bars, and the upper surface thereof abuts on the upper reinforcing bars, and is fixed between the truss reinforcing bars by the three points of contact.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Hidenobu Matsuo             1-12-19 Kitahorie, Nishi-ku, Osaka Stock Exchange             Inside Kurimoto Iron Works (72) Inventor Hideki Ikeda             1-12-19 Kitahorie, Nishi-ku, Osaka Stock Exchange             Inside Kurimoto Iron Works F term (reference) 4G058 GA01 GB02 GC01 GD08 GF01                       GF05

Claims (1)

Claims: 1. A triangular prism-shaped truss reinforcing bar 10 is disposed in parallel, and a long void formwork 2 is disposed between each of the truss reinforcing bars 10 in a direction parallel to the truss reinforcing bars 10. In the hollow slab unit U with a truss reinforcing bar in which the upper reinforcing bar 3 and the lower reinforcing bar 4 are welded to the truss reinforcing bar 10, the truss reinforcing bar 10 includes one upper main reinforcing bar 11 at each of the long sides of the triangular prism. Two lower main reinforcing bars 12 and 12 are arranged, and a slant reinforcing bar 13 is provided between the upper main reinforcing bar 11 and both lower main reinforcing bars 12, respectively.
Has a waveform that rises obliquely from the lower end, bends at the upper end, and repeats rising 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. The lower side of the truss reinforcing bar 10 abuts on the oblique reinforcing bar 13 of the adjacent triangular columnar truss reinforcing bar 10 and the upper surface of the truss reinforcing bar 3 is fixed between the truss reinforcing bars 10 by the three points of contact. A hollow slab unit with a truss reinforcing bar.