JP4420547B2 - Precast concrete thin-walled synthetic board and concrete floor board or wall board using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a precast concrete thin-walled synthetic board.
[0002]
[Prior art]
Conventionally, as shown in FIG. 5, a thin precast concrete (hereinafter also referred to as PCa) plate 101 is formed by connecting rebars 104 and 105 bent in a saw blade shape in the front and back direction of the paper surface of FIG. A PCa thin-walled synthetic board with protruding truss bars 102 is known. When constructing a floor or wall made of cast-in-place concrete, the PCa thin-walled synthetic board is used as a formwork on one surface of the floor or wall, and the truss In-situ concrete 103 is placed on the side where the line 102 protrudes to construct a floor or a wall.
[0003]
[Problems to be solved by the invention]
As shown in FIG. 5, the conventional truss bar 102 has two reinforcing bars 104 and 105 bent in the shape of saw blades as described above and is arranged in the shape of a palm. It is assembled by spot welding. Therefore, the truss bar 102 is bent by a dedicated bending machine, requires spot welding, has a problem that it is difficult to immediately deliver it at a necessary time, and there is a problem that the cost increases. Furthermore, it is necessary to store such truss bars 102 according to their height and length types, and there is a problem that storage is troublesome.
[0004]
Accordingly, an object of the present invention is to provide a precast concrete thin-walled synthetic board that solves these problems, and a concrete floor board or wall board using the same .
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a first aspect of the present invention is to fold a thin precast concrete thin plate used as a concrete formwork and a perforated plate into a mountain shape whose cross section does not have one side of a triangle. The truss body is bent, and the base portion of the truss body is embedded and fixed in the thin plate made of precast concrete so as to protrude from the thin plate made of precast concrete to one side, the truss body and the precast A concrete thin plate with a triangular cross section, and concrete is placed on one side of the precast concrete thin plate, and the size of the hole in the perforated plate is placed on the one side. This is a precast concrete thin-walled synthetic board characterized in that it is set to a size that prevents the aggregate of concrete from flowing into the truss.
[0006]
The second invention described in claim 2 is composed of a thin precast concrete thin plate used as a concrete formwork and a truss body obtained by bending a perforated plate into a mountain shape whose cross section does not have one side of a triangle. The truss body has both bases embedded and fixed in the precast concrete thin plate and protruded from the precast concrete thin plate to one side, and the truss body and the precast concrete thin plate have a cross section. It is triangular, and concrete is cast on one side of the thin plate made of precast concrete , and the size of the hole in the perforated plate is set so that the aggregate of the concrete cast on the single side is in the truss. The size was set so as not to flow in, and the concrete was placed on one side so that a hollow part was formed in the truss. It is a precast concrete thin synthetic plate for the butterflies.
[0007]
For example, in the case of forming a concrete floor board in the field, the precast concrete thin plate of the present invention is placed in a predetermined position with the truss body facing upward, and then the upper portion of the precast concrete thin plate. Place cast-in-place concrete. That is, the plate is used as a mold. By the hardening of the cast-in-place concrete, the cast-in-place concrete adheres to the truss body and the plate, and a concrete floor in which these are integrated is formed.
[0008]
Moreover, a hollow part is formed in the truss body by setting the size of the hole of the truss body so that the concrete to be placed does not pass through.
[0009]
According to a third aspect of the present invention, in the first or second aspect, a plurality of the truss bodies are provided in parallel with appropriate intervals.
[0010]
A fourth invention according to claim 4 is the invention according to any one of the first to third inventions, wherein the perforated plate is formed of a lath metal mesh or a punching metal.
[0011]
According to the present invention, the truss body can be formed using a pre-made perforated plate.
A fifth invention according to claim 5 comprises a thin precast concrete thin plate used as a concrete formwork and a truss body formed by bending a perforated plate into a mountain shape having a triangular cross section and no sides of a triangle. The truss body has both bases embedded and fixed in the precast concrete thin plate and protruded from the precast concrete thin plate to one side, and the truss body and the precast concrete thin plate have a cross section. It is triangular, and concrete is placed on one side of the precast concrete thin-walled plate, and the size of the hole in the perforated plate is set so that the concrete aggregate placed on the one side is placed in the truss. Using a precast concrete thin-walled synthetic board set to a size that does not flow in,
A concrete floor board or wall board using a precast concrete thin-walled synthetic board, wherein concrete is cast on one side of the precast concrete thin-wall board to form a hollow portion in the truss body.
According to a sixth aspect of the present invention, in the fifth aspect, a plurality of the truss bodies are provided in parallel with appropriate intervals.
According to a seventh aspect of the present invention, in the fifth or sixth aspect, the perforated plate is formed of a lath metal mesh or a punching metal.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described based on the embodiment shown in FIGS.
[0013]
FIG. 1 shows a first embodiment.
[0014]
1 is a thin plate made of precast concrete (hereinafter referred to as PCa thin plate), and its thickness t is considerably thinner than the thickness T of the floor or wall of the final molded product to be constructed, as shown in FIG. And a thickness having a predetermined strength. Moreover, the size on the plane is formed in a predetermined vertical width and horizontal width. Further, a reinforcing bar 2 is arranged in the PCa thin plate 1.
[0015]
Reference numeral 3 denotes a truss body formed by bending a perforated plate 4 such as a lath metal mesh or punching metal. In the embodiment shown in FIG. 1, the base 5 and 5 are bent horizontally. Is formed. In addition, the size of the hole in the perforated plate 4 is set to a size that does not allow a ready-mixed concrete aggregate or the like to be poured in later.
[0016]
In order to mold the thin synthetic plate 6 provided with the truss body 3, the rebar 2 is arranged on the surface plate in a factory or the field, and the truss bent into a mountain shape as shown in FIG. The body 3 is erected so as not to move. The truss body 3 is erected by fixing both base parts 5 to the reinforcing bar 2 by welding or binding wires, or by supporting the upper part of the truss body 3 and suspending and holding the truss body 3. Also good. Next, the formwork is arranged around the surface plate, and the concrete is placed thinly so that the upper part of the truss body 3 protrudes as shown in FIG.
[0017]
Then, by curing and curing the concrete, a PCa thin composite plate 6 in which the truss body 3 protrudes from one side of the PCa thin plate 1 as shown in FIG.
[0018]
And the said PCa thin-walled synthetic board 6 is carried out to the field etc., and the said PCa thin-walled synthetic board 6 is used as a one-sided formwork in the part which constructs a concrete floor or wall. For example, when molding a concrete floor board, as shown in FIG. 1 (b), the PCa thin composite board 6 is arranged so that the truss body 3 protrudes upward, and the cast-in-place concrete is placed on the top. 7 is driven to the top of the truss body 3. Further, the upper reinforcing bars 8 are arranged if necessary.
[0019]
When placing the cast-in-place concrete 7, the opening portions at both ends of the truss body 3 are closed by molds arranged around the concrete, and the placed concrete is opened from the opening portions at both ends of the truss body 3. Prevent it from entering the body.
[0020]
When the in-situ concrete 7 is hardened, a concrete floor board having a thickness T is formed. A hollow portion 9 is formed in the truss body 3.
[0021]
When molding a wall plate, the PCa thin composite plate 6 is placed on one side and used as a mold, and another well-known mold is placed on the other side. To cast.
[0022]
As described above, this embodiment has the following effects.
[0023]
Since the truss body 3 only needs to cut a long plate-like perforated plate to a desired length and simply bend it, the truss body 3 has a higher height than the conventional truss that is assembled by welding the reinforcing bars. Immediate delivery is possible for various requests with different sheath lengths. Furthermore, since it can be easily assembled with an inexpensive material compared to conventional truss bars, the cost of the product itself can be reduced.
[0024]
Further, since the truss body 3 can be supplied by cutting, bending and supplying a plate-shaped raw material immediately when necessary, it can be stored in a plate shape at the time of storage, and the storage is easy and cheap.
[0025]
Furthermore, since the hollow part 9 is formed in the truss body 3, the product can be lightened, and the hollow part 9 can be used for piping and wiring. Further, since the truss body 3 has strength, the hollow portion 9 is continuously provided, which is effective for heat insulation and sound insulation.
[0026]
Further, the hollow portion 9 does not require the foamed plate and can reduce the material and labor costs as compared with those using a well-known foamed plate.
[0027]
FIG. 2 shows a second embodiment.
[0028]
In the second embodiment, the perforated plate 4 is continuously bent into a truss shape, and a plurality of truss bodies 3 are continuously formed. Further, a perforated flat plate 10 such as a flat plate lath is also connected between the bottoms and the tops of the adjacent truss bodies 3.
[0029]
Since other structures are the same as those of the first embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.
[0030]
In the second embodiment, the same actions and effects as described above can be exhibited.
[0031]
Moreover, when the truss bodies 3 are continuously arranged in this way, a large hollow portion is formed, which can be used as a void plate.
[0032]
FIG. 3 shows a third embodiment.
[0033]
In this embodiment, two truss bodies 3 described above are arranged in parallel at an appropriate interval, and the tops thereof are connected by a perforated flat plate 10 such as a flat plate lath.
[0034]
Since other structures are the same as those of the first embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.
[0035]
In the third embodiment, the same operation and effect as described above are exhibited.
[0036]
FIG. 4 shows a fourth embodiment.
[0037]
In the fourth embodiment, reinforcing bars 11 are fixed in the longitudinal direction of the truss body 3 at the top of the truss body 3 in the first embodiment.
[0038]
Such a reinforcing bar 11 may be provided on the truss body 3 of the second and third embodiments.
[0039]
【The invention's effect】
As described above, according to the present invention, compared to the conventional truss bar, the truss body of the present invention can be formed of an inexpensive material and only by cutting the original plate into a predetermined length and bending it. Therefore, the cost of the product itself can be reduced, and the storage can be performed with a flat raw material, so that the storage is easy and inexpensive.
[0040]
Furthermore, when the cast-in-place concrete is cast using the precast concrete thin-walled synthetic plate of the present invention as a mold, the inside of the truss can be made hollow. Therefore, the product can be lightened by the hollow portion, and the hollow portion can be used for piping, wiring, and the like. Further, the hollow portion has an effect of heat insulation and sound insulation.
[0041]
According to invention of Claim 3 and 6, the void board which has a big hollow part can be formed further.
[0042]
According to invention of Claim 4 and 7 , a truss body can be further cheaply formed with a pre-made board.
[Brief description of the drawings]
1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a cross-sectional perspective view of a PCa thin-walled synthetic board of the present invention, and FIG. 1B is an example of molding a floor board using the PCa thin-walled synthetic board FIG.
FIG. 2 is a sectional view showing a second embodiment of the present invention.
FIG. 3 is a sectional view showing a third embodiment of the present invention.
FIG. 4 is a sectional view showing a fourth embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a conventional PCa thin composite plate.
[Explanation of symbols]
1 Thin plate made of precast concrete 3 Truss body 4 Perforated plate 5 Base

Claims (7)

It consists of a thin precast concrete thin plate used as a concrete formwork, and a truss body obtained by bending a perforated plate into a mountain shape whose cross section does not have one side of a triangle. Embedded and fixed in the precast concrete thin plate, projecting from the precast concrete thin plate to one side , the cross section of the truss body and the precast concrete thin plate is triangular, and the precast concrete thin plate Concrete is placed on one side, and the size of the hole in the perforated plate is set so that the concrete aggregate placed on the one side does not flow into the truss. Precast concrete thin-walled synthetic board. A thin precast concrete thin plate used as a concrete formwork and a truss body obtained by bending a perforated plate into a mountain shape whose cross section does not have one side of a triangle. Embedded and fixed in the precast concrete thin plate, projecting from the precast concrete thin plate to one side, the truss body and the precast concrete thin plate have a triangular cross section , one side of the precast concrete thin plate Concrete is placed on the side, and the size of the hole in the perforated plate is set so that the concrete aggregate placed on the one side does not flow into the truss, A precast concrete characterized in that a hollow portion is formed in the truss by placing concrete on Over door made of thin synthetic plate. The precast concrete thin-walled composite board according to claim 1 or 2, wherein a plurality of the truss bodies are provided in parallel with appropriate intervals. The precast concrete thin-walled synthetic plate according to any one of claims 1 to 3, wherein the perforated plate is formed of a lath metal mesh or a punching metal. A thin precast concrete thin plate used as a concrete formwork and a truss body obtained by bending a perforated plate into a mountain shape whose cross section does not have one side of a triangle. Embedded and fixed in the precast concrete thin plate, projecting from the precast concrete thin plate to one side, the truss body and the precast concrete thin plate have a triangular cross section , one side of the precast concrete thin plate Concrete is cast on the side, and the size of the hole in the perforated plate is set so that the concrete aggregate placed on one side does not flow into the truss Using a synthetic board,
A concrete floor board or wall board using a precast concrete thin-walled synthetic board, wherein concrete is cast on one side of the precast concrete thin-wall board to form a hollow portion in the truss body. A concrete floor board or wall board using the precast concrete thin-walled synthetic board according to claim 5, wherein a plurality of the truss bodies are provided in parallel at appropriate intervals. A concrete floor board or wall board using the precast concrete thin-walled synthetic board according to claim 5 or 6, wherein the perforated board is formed of a lath metal mesh or a punching metal.

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