JPH0598734A - External wall panel made of precast concrete synthesized with steel frame - Google Patents

Abstract

PURPOSE:To improve dimensional accuracy by projecting the front end of a bolt buried into a concrete board and integrally attached to the concrete board from the concrete board and fixing a steel frame by the projecting section of the bolt. CONSTITUTION:The horizontal pieces 5 of a plurality of L-shaped bolts 4 are welded on the outer circumferential section of a reinforcement 1, in which vertical reinforcements 2 and horizontal reinforcements 3 are connected integrally in a meshy shape, at intervals. The front ends of vertical pieces 6 are inserted into the boltholes 10 of a steel frame 7 under the state, in which nuts on the lower side are screwed to male screw sections mounted to the vertical pieces 6 of the bolts 4, and clamped by nuts on the upper side. The unified reinforcement 1 and frame 7 are installed into forms, and concrete is poured into the forms and cured, thus forming an external wall panel 18, in which a concrete board 17 and the frame 7 are unified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer wall panel made of precast concrete having a synthetic structure synthesized with a steel frame.

[0002]

2. Description of the Related Art In an outer wall panel made of precast concrete such as a lightweight concrete plate, a steel frame is attached to the inner surface of the outer wall panel in order to attach and reinforce the panel to a beam. Conventionally, as shown in FIG. 5, a cap nut-shaped metal fitting 22 is embedded in advance when the concrete plate 21 is molded, and a frame-shaped steel frame frame 2 manufactured separately from the concrete plate 21 is manufactured.
3 is attached by a bolt 24 that is screwed into the metal fitting 22.

[0003]

As described above, in the conventional art, the steel frame is mounted by the bolts that are screwed into the metal fittings embedded in the concrete. However, in such a structure, the concrete plate is made of the steel frame. Since it is not completely integrated with the frame, there is a disadvantage that concrete cannot be calculated as a structure. In addition, since each concrete and steel frame are separately commercialized and then fixed with bolts, the errors generated in the process of commercializing them are synergized to improve the dimensional stability performance of the entire outer wall panel. There is an inferior problem. Moreover, since they are separately manufactured and connected by bolts, the number of manufacturing steps is increased and the cost is increased.

That is, an object of the present invention is to make it possible to calculate concrete plates as structures even with high dimensional accuracy and easy manufacture.

[0005]

In order to achieve the above-mentioned object, the present invention is such that the tip of a bolt embedded in a concrete plate and integrally attached to the concrete plate is projected from the concrete plate, The protrusion of this bolt fixes the steel frame.

In the above, it is conceivable to form the bolt in an L-shape and weld the bolt to a reinforcing bar embedded in concrete.

[0007]

EXAMPLE The structure of the present invention will be described in accordance with the manufacturing process. In FIGS. 3 and 4, (1) is a mesh-shaped rebar in which a vertical bar (2) and a horizontal bar (3) are integrally connected. A large number of L-shaped bolts (4) are welded to the outer peripheral portion of the horizontal piece (5) on one side thereof in advance at intervals in the outer peripheral direction. Further, the other vertical piece (6) forming the male screw projects upward with respect to the reinforcing bar (1).

On the other hand, (7) is four channel steels (8)
(8) is a steel frame that is joined in a rectangular frame shape so that its groove faces inward, and the lower horizontal flange (9) matches the position of the bolt (4). Then, a large number of bolt holes (10) are formed.

In the above description, the upper and lower nuts (11, 12) are screwed into the male screw portion of the bolt (4), and the lower nut (11) is screwed first. Then, the tip thereof is inserted into the bolt hole (10) of the steel frame (7) and is tightened by another nut (12) screwed onto the upper portion thereof to be integrated with the steel frame (7). In the figure, (13) is the upper flange of the steel frame (7).
This mounting plate is welded to (14).
It is attached to a frame such as a beam via (13).

After the rebar (1) and the steel frame (7) are integrated as described above, the rebar (1) and the steel frame (7) are placed in a concrete molding frame (15) as shown in FIG. The concrete (16) is poured and cured to obtain an outer wall panel (18) in which a concrete plate (17) and a steel frame (7) are integrated as shown in FIG. At this time, as shown in FIG. 1, the steel frame (7)
Of the upper and lower nuts (11) (12) for fixing the, the upper surface of the lower nut (12) is embedded in the concrete plate (17).

[0011]

As described above, according to the present invention, since the steel frame is fixed by the bolts embedded in the concrete plate and integrally attached thereto, the steel frame and the concrete plate are securely anchored through the bolts serving as anchors. It has the effect of being able to calculate the structure as an integrated structure that is integrated with steel frame and concrete plate. Moreover, as described above, since the concrete can be molded and the frame can be joined at the same time by installing the bolts to the frame in advance in the frame, it is possible to reduce the man-hours and the manufacturing cost. Not only this, it is possible to absorb the error between the steel frame and the bolt during the molding of this concrete, and it is possible to provide the one with stable quality.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of an outer wall panel showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing a method for molding a concrete board.

FIG. 3 is an overall perspective view of a state in which a steel frame and reinforcing bars are integrated.

FIG. 4 is an enlarged perspective view of the main part of the same.

FIG. 5 is a sectional view of a main part of a conventional outer wall panel.

[Explanation of symbols]

 1 Reinforcing bar 4 Bolt 7 Steel frame 17 Concrete plate 18 Exterior wall panel

Claims (3)

[Claims] 1. A concrete frame is characterized in that the tip of a bolt embedded in a concrete plate and integrally attached to the concrete plate is projected from the concrete plate, and the steel frame is fixed by the projecting portion of the bolt. Precast concrete exterior wall panel with steel frame. 2. A precast concrete outer wall panel synthesized with a steel frame according to claim 1, wherein the reinforcing bars embedded in the concrete plate and the embedded portions of the bolts are welded in the concrete plate. 3. The precast concrete outer wall panel synthesized with the steel frame according to claim 1, wherein the bolt is formed in an L shape.