JP3654879B2 - Hollow material unit, precast concrete board and concrete slab - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hollow material unit capable of simply and strongly mounting connecting reinforcing bars to hollow material bodies. <P>SOLUTION: The hollow material unit 13 is so constituted that the hollow material bodies 6 fitting upper hollow materials 15 to lower hollow materials 9 are connected with connecting members 8 at proper intervals and that connecting reinforcing materials 5 are held over fitting sections of the upper hollow materials 15 and the lower hollow materials 9 of the hollow material bodies 6, and reinforcing members 7a and 9a are formed over opposite surfaces in hollow sections of upper hollow materials 7 and/or the lower hollow materials 9. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hollow material unit, a precast concrete board and a concrete slab using the hollow material unit.
[0002]
[Prior art]
Conventionally, in order to attach a grid-like connection reinforcing material to a hollow material unit embedded in a hollow slab, as shown in Japanese Patent Application No. 2002-136777, a groove is formed, or it is integrated when a hollow material unit is manufactured. There was no choice but to mold.
[0003]
[Patent Document 1]
Japanese Patent Application No. 2002-136777 [0004]
[Problems to be solved by the invention]
However, what is fitted in the groove as described above may cause the connection reinforcing bars to come off when the worker sits on the hollow material unit when assembling the hollow slab or placing concrete. .
Further, the one integrally formed with the hollow material unit has a problem in that it is difficult to automatically produce the hollow material, resulting in high cost.
[0005]
This invention is made | formed in view of the above problems, The objective is to provide the hollow material unit by which a connection reinforcement is simply and firmly attached to a hollow material main body.
[0006]
[Means for Solving the Problems]
The gist of the hollow material unit for solving the above problems is that a hollow material body formed by fitting an upper hollow material and a lower hollow material is connected with a connecting member at an appropriate interval, and an upper portion of these hollow material bodies The connecting reinforcing material is sandwiched between the fitting portions of the hollow material and the lower hollow material. Moreover, it is included that the reinforcing member which installs a connection reinforcing material over the opposing surface was formed in the hollow of an upper hollow material and a lower hollow material. Further, the connection reinforcing material includes being sandwiched at a height located near the upper end of the slab when the hollow material main body is disposed on the concrete slab. In addition, at least one of the upper hollow members and the lower hollow members is integrally formed with a connecting member. In addition, it is included that the lower hollow members are connected by two upper and lower connecting members. Further, the connecting member includes being reinforced with a hard member. The upper hollow member or the lower hollow member has a hemispherical shape, and includes a capsule-shaped hollow member body formed by fitting these hollow members. It also includes that the sheet is bonded instead of the upper hollow material.
The gist of the precast concrete board is a structure characterized in that the above hollow material unit is inverted and installed on the upper surface of the concrete board in a state where the upper hollow body and the connecting reinforcing material are removed.
The concrete slab is composed of a hollow material body formed by fitting an upper hollow material and a lower hollow material with a connecting member at an appropriate interval, and a connecting reinforcing material is sandwiched between fitting portions of these hollow material bodies. The hollow material unit is embedded in the concrete. Moreover, it is included that the reinforcing member was formed in the hollow of upper hollow material and lower hollow material over the opposing surface. Further, the connection reinforcing material includes being sandwiched at a height located near the upper end of the slab when the hollow material main body is disposed on the concrete slab. In addition, at least one of the upper hollow members and the lower hollow members is integrally formed with a connecting member. In addition, it is included that the lower hollow members are connected by two upper and lower connecting members. Further, the connecting member includes being reinforced with a hard member. The upper hollow member or the lower hollow member has a hemispherical shape, and includes a capsule-shaped hollow member body formed by fitting these hollow members.
[0007]
In the formation of the hollow material unit, when the connecting reinforcing bar is installed on the lower hollow material and the upper hollow material is fitted, the connecting reinforcing bar is easily sandwiched between the fitting portions of the lower hollow material and the upper hollow material.
Moreover, when a hollow material unit is installed in a formwork, since a hollow material main body is pressed down by the cross | intersection part of a grating | lattice, it can prevent the floating by concrete placement. Further, when the hollow material unit is installed in the mold by the reinforcing members formed in the hollows of the upper hollow material and the lower hollow material, the worker can have the strength to work on the hollow material main body.
Further, when the hollow material main body is arranged in the slab formwork, the connection reinforcing material is easily connected to the slab upper end muscle.
In addition, the connecting reinforcing material can be sufficiently fixed even with a sheet bonded in place of the upper hollow body.
Further, since the lower hollow members are connected to each other by two upper and lower connecting members, it is possible to prevent the lower hollow members from being displaced from each other when the concrete is placed in the slab formwork.
Further, when the hollow material unit is installed in the formwork, the connecting member is reinforced with a hard member, so that it does not dent due to pressing by lifting due to concrete placement. Further, the connection reinforcing material can be replaced with a hard connection member.
Precast concrete board and concrete slab with high porosity can be constructed.
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the hollow material unit of the present invention will be described with reference to the drawings. In the embodiments, the same components are described with the same reference numerals, and only different components are described with different reference numerals.
[0009]
FIG. 1 shows a hollow material unit 1 according to the first embodiment. The hollow material unit 1 is configured such that an upper unit 2 and a lower unit 3 are fitted, and a connecting reinforcing material 5 such as a reinforcing bar is sandwiched between the fitting portions 4.
[0010]
As shown in FIG. 3, the upper unit 2 has a hemispherical upper hollow material 7 obtained by dividing a capsule-shaped hollow material body 6 formed of a foam material in the horizontal direction and is integrally connected by a connecting member 8. A fitting groove 10 that is configured and into which a fitting projection 11 of a lower hollow member 9 described later is fitted is formed. The fitting groove 10 is formed in one direction passing through the center (vertical direction in the figure), and has an inverted V shape that gradually narrows toward the top. A reinforcing member 7a is integrally formed in the hollow of the upper hollow member 7 over the opposing surface.
[0011]
On the other hand, as shown in FIG. 4, the lower unit 3 is configured by integrally connecting lower hollow members 9, which are one-side cracks of the hollow member main body 6, with a connecting member 8. Further, a flat cross-shaped reinforcing member 9a for partitioning the space across the opposing surface is formed in the hollow of the lower hollow material, and one of the reinforcing members 9a is integrally formed so that the fitting protrusion 11 protrudes from the upper surface. A concave groove 12 in which the connection reinforcing material 5 is installed is formed at the top of the joint 11. The fitting protrusion 11 is fitted into the fitting groove 10 of the upper hollow member 7 and serves as a reinforcing member for the upper hollow member. It has become. In this way, the round bar having the connection reinforcing member installed in one direction can be replaced with a welded wire mesh, thereby improving the economic efficiency.
[0012]
When the fitting protrusion 11 is fitted into the fitting groove 10, the connection reinforcing material 5 is pressed down and is sandwiched between the fitting portions 4 between the upper unit 2 and the lower unit 3. Therefore, the hollow material unit 1 in which the connection reinforcing material 5 is sandwiched between the fitting portions 4 between the upper unit 2 and the lower unit 3 can be easily formed. Moreover, when the hollow material main body 6 is arrange | positioned at a concrete slab, said connection reinforcement material 5 is pinched | interposed into the height located in the vicinity of a slab upper end reinforcement.
[0013]
FIG. 5 shows the hollow material unit 13 of the second embodiment. In this hollow material unit 13, the connecting reinforcing material 5 has a lattice shape, and the hollow material body 6 is installed at the intersection 14 of the lattice.
[0014]
As shown in FIG. 7, the hollow material body 6 is composed of a capsule-shaped lower hollow material 9 formed of a foam material, and a lid 15 which is an upper hollow material fitted to the capsule-shaped lower hollow material 9. The hollow members 9 are integrally connected by two upper and lower connecting members 8 to constitute a unit. Further, the same reinforcing member 9 a as described above is formed in the lower hollow member 9, and the connecting reinforcing member 5 is installed in the cross-shaped concave groove 12 formed on the reinforcing member 9 a and pressed by the lid 15. It has been.
[0015]
Further, the connecting member 8 is provided with a notch 16 at the center so that an arbitrary hollow material body 6 can be easily cut. Moreover, since the cross | intersection part 14 of the connection reinforcement 5 is engage | inserted in the cross-shaped ditch | groove 12, one has the depth twice the other.
[0016]
Therefore, when the connection reinforcing material 5 is installed in the concave groove 12 and the protrusion 15a (with a reverse taper surface) of the lid 15 is fitted into the hollow portion of the lower hollow material 9, as described above, this fitting is performed. A hollow material unit 13 in which the connecting reinforcing material 5 is sandwiched between the portions 4 can be formed. Further, since the lower hollow member 9 is integrally connected by the upper and lower connecting members 8, there is no movement due to the concrete placing pressure.
[0017]
FIG. 8 shows the above-described hollow material unit 13 installed in a mold 17, and the connecting reinforcing material 5 is bound near the upper end bar 18 of the slab, and the upper end bar 18 is bound by a restraining metal 18 a. Since it is restrained by the formwork 17, it can resist the lifting of the hollow material main body 6 that occurs when placing concrete.
[0018]
FIG. 9 shows a hollow material unit 19 according to the third embodiment. This hollow material unit 19 is obtained by adhering a sheet 20 to the upper surface of the lower hollow material 9 instead of the lid body 15 and has the same configuration as the hollow material unit 13 of the second embodiment except for this (connection) Excluding that the member has two stages). With this sheet 20, the connection reinforcing material 5 does not come out of the concave groove 12 in the same manner as the lid 15.
[0019]
FIG. 10 shows a hollow material unit 21 according to the fourth embodiment. In this hollow material unit 21, the lower unit 3 formed by connecting the lower hollow members 9 to each other by the connecting member 8 and the upper unit 2 formed by connecting the upper hollow members 7 to each other by the connecting member 8 are fitted. A protective member 22 that is a hard member is provided on the upper surface of the connecting member 8 of the upper unit 2. A slab upper end bar (not shown) is arranged on the protective member 22 to prevent the hollow material unit 21 from being lifted up by placing concrete in the mold. In addition, the protective member 22 prevents the connecting member 8 from being dented by the pressing of the slab upper end line due to the lifting, and the protective member 22 also serves as an alternative to the connecting reinforcing member 5.
[0020]
In addition, the upper hollow material or the lower hollow material in the capsule-shaped hollow material main body of the hollow material units 1, 13, and 21 of the first, second, and fourth embodiments can be formed into a hemispherical shape.
[0021]
FIG. 11 is a precast concrete plate 23 using a part of the hollow material unit 13 of the second embodiment, the hollow material unit 13 is inverted, and the upper hollow body 7 and the connecting reinforcing material 5 are removed. In this state, it is installed between the truss bars 25 of the concrete plate 24. In addition, a precast concrete board can also be formed using the hollow material units 1, 19, and 21 of the first, third, and fourth embodiments.
[0022]
FIG. 12 shows a concrete slab 26 using the hollow material unit 1 of the first embodiment, and the hollow material unit 13 is embedded in the concrete 27 at appropriate intervals. In addition, a concrete slab can also be constructed | assembled using the hollow material units 13, 19, and 21 of 2nd-4th embodiment.
[0023]
【The invention's effect】
A hollow material unit to which the connecting reinforcing bars can be easily attached can be manufactured.
[Brief description of the drawings]
FIG. 1 shows a hollow material unit according to a first embodiment, wherein (1) is a plan view, (2) is a front view, and (3) is a side view.
2 shows an upper unit and a lower unit of the hollow material unit of FIG. 1 separated from each other, (1) being a front view and (2) being a side view.
3 is an upper unit of the hollow material unit according to the first embodiment, wherein (1) is a plan view, (2) is a front view, and (3) is a side view. FIG.
4 is a lower unit of the hollow material unit according to the first embodiment, (1) is a plan view, (2) is a front view, and (3) is a side view. FIG.
FIG. 5 is a hollow material unit according to a second embodiment, wherein (1) is a plan view, (2) is a front view, and (3) is a side view.
6 is a front view in which a lower hollow member and an upper lid of the hollow member unit of FIG. 5 are separated. FIG.
7 is a hollow material unit according to a second embodiment, wherein (1) is a front view of a lid, (2) is a bottom view thereof, (3) is a plan view of a lower hollow material, (4) and (5) is a sectional view of the concave groove, (6) is a sectional view of the connecting member, and (7) is a front view thereof.
FIG. 8 is a view showing a method of using the hollow material unit of the second embodiment.
FIG. 9 shows a hollow material unit according to a third embodiment, wherein (1) is a plan view, (2) is a front view, and (3) is a side view.
FIGS. 10A and 10B show a hollow material unit according to a fourth embodiment, where FIG. 10A is a front view, FIG. 10B is an enlarged view of main parts, and FIG. 10B is a front view in which an upper unit and a lower unit are separated. .
FIG. 11 is a precast concrete board, (1) is a cross-sectional view, and (2) is a plan view.
FIG. 12 is a cross-sectional view of a concrete slab.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 13, 19, 21 Hollow material unit 2 Upper unit 3 Lower unit 4 Fitting part 5 Connection reinforcement material 6 Hollow material main body 7 Upper hollow material 7a, 9a Reinforcement member 8 Connection member 9 Lower hollow material 10 Fitting groove 11 Fitting Joint protrusion 12 Concave groove 14 Intersection 15 Lid 15a Protrusion 16 Notch 17 Form 18 Upper bar 18a Restraint hardware 20 Sheet 22 Protective material 23 Precast concrete plate 24 Concrete 25 Truss 26 Concrete slab 27 Concrete

Claims (10)

The hollow material main body formed by fitting the upper hollow material and the lower hollow material is connected with a connecting member at an appropriate interval, and the connecting reinforcing material extends over the fitting portion between the upper hollow material and the lower hollow material of the hollow material main body. A hollow material unit characterized in that is sandwiched. The hollow material unit according to claim 1, wherein a reinforcing member for installing a connection reinforcing material is formed in the hollow of the upper hollow material and the lower hollow material over the opposing surfaces. 3. The hollow material unit according to claim 1, wherein the connection reinforcing material is sandwiched at a height located in the vicinity of the slab upper end muscle when the hollow material body is disposed on the concrete slab. The hollow material unit according to any one of claims 1 to 3, wherein at least one of the upper hollow materials and the lower hollow materials is integrally formed by a connecting member. The hollow material unit according to claim 4, wherein the lower hollow materials are integrally formed by two upper and lower connecting members. The hollow member unit according to claim 1, wherein the connecting member is reinforced with a hard member. The hollow material unit according to any one of claims 1 to 6, wherein the upper hollow material or the lower hollow material has a hemispherical shape, and these hollow materials are fitted to form a capsule-shaped hollow material body. . The hollow material unit according to any one of claims 1 to 7, wherein a sheet is bonded instead of the upper hollow material. A precast concrete board, wherein the hollow material unit according to any one of claims 1 to 7 is inverted and installed on the upper surface of the concrete board in a state where the upper hollow body and the connecting reinforcing material are removed. A concrete slab in which the hollow material unit according to claim 1 is embedded in concrete.

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