JPH06341183A - Manufacture of thin walled precast concrete - Google Patents

Abstract

PURPOSE:To reduce the number of components and facilitate bar arrangement in an intermediate part and concrete casting work by combining truss reinforcements comprising main reinforcements and corrugated diagonal reinforcements in a state resting against each other and forming a frame member. CONSTITUTION:Corrugated diagonal reinforcements which serve as web reinforcement are interposed between two main reinforcements 1. The four truss reinforcements A are combined in square shape so that they may be erected in the transverse direction. The truss reinforcements 1 and reinforcing bars 3 are allowed to span an intermediate part in the truss reinforcements A combined in square shape. Then, concrete is cast at a specified thickness in such a fashion that one party of the main reinforcements 1 may be buried while the other party of the main reinforcement may be exposed outside. A nut-shaped separator mounting part is protrusively installed to a crossing part between the main reinforcements and corrugated diagonal reinforcements so that it may be used as a means to connect a lagging. This construction makes it possible to manufacture thin-walled precast concrete boards at low cost and with ease as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a thin precast concrete plate used in combination with cast-in-place concrete when constructing walls, floors and the like.

[0002]

2. Description of the Related Art Conventionally, various thin precast concrete plates have been proposed in which half of the truss bars are embedded in concrete and the other parts of the truss bars are projected from the panel.

[0003]

In the case of the conventional general thin-walled precast concrete plate, many parts are required to manufacture the truss bar, and the manufacturing of the truss bar is complicated and the manufacturing cost is high. It was

The present invention has been made in order to solve the above-mentioned problems, and it is easy to manufacture, the manufacturing cost can be reduced, and the thin precast concrete which can be easily connected to the formwork at the time of use. The purpose is to provide a plate.

[0005]

A thin precast concrete plate according to the present invention forms a truss reinforcement in which corrugated oblique reinforcement is interposed between two parallel main reinforcements, and the truss reinforcement rises in the width direction. Assembled in a rectangular frame body so that one main bar of the parallel main bar is embedded in the concrete panel part, and the other main bar is poured and projected so that the other main bar protrudes from the surface of the concrete panel part. This is a method for manufacturing a thin precast concrete plate in which a separator mounting portion is formed so as to project at the intersection of the main reinforcement 1 and the diagonal reinforcement 2.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on an embodiment shown in the drawings.

In the figure, A is a truss muscle, which is fixed by interposing a corrugated oblique muscle 2 as an abdominal muscle between two parallel main muscles 1 and 1. (Figs. 3a, 3b, and 3c) Four trusses A are assembled in a rectangular shape so that the trusses A rise in the width direction, and are fixed by welding. Further, the truss reinforcement A may be stretched over the intermediate portion of the truss reinforcement A assembled in this rectangular shape, and the reinforcing bar 3 may be stretched over it. (FIG. 1) The concrete panel portion 4 is formed by embedding one of the parallel main bars 1 of the truss bars A assembled as described above. The other main bar 1 is projected on one surface of the concrete panel portion 4. (FIG. 2) The separator mounting portion 5 is provided so as to project at the intersection of the truss reinforcement A and the diagonal reinforcement 2 of the thin precast concrete plate B configured as described above. The separator mounting portion 5 has a nut shape. (FIG. 4) Also, as shown in FIG. 5, the main bar 1 projecting from the concrete panel part 4 is slightly displaced from the top of the corrugated oblique bar 2 and fixed,
You may form the separator attachment part 5 in this triangular part. (FIG. 5) Further, as shown in FIG. 3b, the tip of the corrugated diagonal streak 2 to be embedded in the concrete panel portion 4 may be bent to make it difficult to come out from the concrete.

The thin precast concrete plate B constructed as described above is installed on the existing concrete, and the upper part is reinforced by connecting the main bars 1 and the like to the beam bars, and the remaining reinforcing bars necessary for the wall are arranged and the separator is formed. A weir plate 7 is erected through the line 6. A wall is constructed by placing concrete between the concrete panel part 4 and the dam plate 7 of the precast concrete plate B.

[0009]

EFFECTS OF THE INVENTION The present invention has the above-described structure, and the truss muscles composed of the main muscles and the corrugated diagonal muscles are combined together in a leaning manner to form the frame body. Can be held, and the work of arranging the middle part and placing concrete is easy. Further, since the truss reinforcement in which the two main reinforcements are fixed by the corrugated oblique reinforcement is used, the number of parts is small and the manufacturing can be performed easily and inexpensively.

Further, since the separator mounting portion is provided so as to project at the intersection of the main bar and the oblique bar, it is easy to mount the separator connected to the dam plate.

[Brief description of drawings]

FIG. 1 is a perspective view of a truss bar manufactured.

FIG. 2 is a perspective view of a thin precast concrete board.

3A to 3C are perspective views of truss muscles, showing modified examples.

FIG. 4 is a partial perspective view of a thin precast concrete board.

FIG. 5 is a partial perspective view of a thin precast concrete board according to another embodiment.

FIG. 6 is a cross-sectional view of a usage state.

[Explanation of Codes] A ... Truss bar, B ... Thin precast concrete plate 1 ... Main bar, 2 ... Wave diagonal bar, 3 ... Reinforcing bar, 4 ... Concrete panel part, 5 ... Separator mounting part, 6 ... Separator, 7 ... Dam plate .

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiyuki Yoshimatsu 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Satoshi Saito 2515 Kasakakumura, Nitta-gun, Gunma Prefecture

Claims (3)

[Claims] Claim: What is claimed is: 1. A parallel truss is formed by forming a truss stirrup in which a corrugated oblique stirrer is interposed between two parallel main stirrups, and the truss streak is arranged so as to stand up in the width direction and assembled into a rectangular frame. A method for producing a thin-walled precast concrete plate, wherein one main bar is embedded in a concrete panel part, and the other main bar is cast so that the main bar protrudes from the surface of the concrete panel part. 2. The method for manufacturing a thin precast concrete plate according to claim 1, wherein an intermediate truss bar and a reinforcing bar are arranged in the rectangular frame body. 3. The method for producing a thin precast concrete plate according to claim 1, wherein a main part of the truss reinforcement of the concrete panel is provided with a separator attachment part.