JP2794078B2 - Crack prevention structure for PC panel with metal frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PC panel having a metal frame such as an aluminum window frame attached to the inner periphery of an opening of the PC panel body. The present invention relates to a structure for preventing cracks.

[0002]

2. Description of the Related Art Heretofore, a PC with an aluminum window frame, for example, in which an aluminum window frame is mounted on the inner periphery of a rectangular opening of a PC panel main body and anchor portions of upper, lower, left and right frame members are embedded in the PC panel main body and attached. Panels are widely used on building exterior walls.

[0003]

However, in the conventional PC panel having a window frame made of aluminum, since each frame material of the window frame is easily peeled off from concrete, each frame material repeatedly expands in the longitudinal direction due to thermal expansion. However, there has been a drawback that the pressing force is concentrated on the corners of the opening of the PC panel main body and eventually cracks are generated, but no effective countermeasure has been developed for this in the past.

[0004] It is an object of the present invention to prevent the occurrence of cracks at corners of openings in a PC panel with a metal frame.

[0005]

As a means for solving the above-mentioned problems, the present invention provides a PC panel body having a rectangular opening, wherein a frame made of metal upper and lower horizontal frame members and left and right vertical frame members is attached to the inner periphery of the opening. In the PC panel with a metal frame, the length of the frame material extends over the area corresponding to at least each longitudinal end surface of the vertical and horizontal frame materials located at the corner at the opening corner of the PC panel body. A crack preventing structure for a PC panel with a metal frame, in which an elastic cushioning material to absorb the directional extension is filled instead of concrete, is proposed.

[0006] The "elastic cushioning material" in the present invention includes:
Foams such as urethane foam, rubber, synthetic resins, and other various elastic materials having elasticity are used. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0007]

FIG. 1 shows an embodiment in which the present invention is applied to a PC panel (1) having an aluminum window frame. The PC panel (1) is provided in a rectangular opening (3) of a PC panel body (2) having a rectangular frame shape. Around
Upper and lower horizontal frame members (4) and (5) and left and right vertical frame members (6),
A window anchor (9) (9) having a length extending over the entire length of a corresponding frame member protruding two by two from each of the frame members (4) to (7) is formed. ), (1)
0), (10), (11), (11), (12), and (12) are mounted by being buried inside the PC panel body (2), and the PC panel (1) with a window frame is driven into concrete. At the time of molding, first, each protruding corner portion of each of the anchors (9), (9) to (12), and (12) of the frame members (4) to (7) is partially cut out, and the frame members (4) to (7) are cut out.
After setting the window frame (8), which forms the framework of (7), at a predetermined position in the concrete formwork, a rectangular mat-like elastic cushioning material (13) made of urethane foam is provided at the anchor notch at each protruding corner. Is bent into a key shape and abutted, and concrete is poured in that state. In this case, the elastic cushioning material (13) has an area covering an area appropriately wider than the longitudinal end surfaces of both the vertical and horizontal frame members at the corners of the window frame.
The PC panel with window frame (1) obtained in this way is
As shown in FIGS. 1 and 2, at the corners of each opening of the PC panel main body (2), elastic cushioning materials (13) form the corners instead of concrete, and form vertical and horizontal frame members. It is in contact with the protruding corner of the window frame (8) so as to cover each longitudinal end face.

In the PC panel (1) with a window frame in which the above-mentioned elastic cushioning materials (13) are installed, the upper and lower horizontal frame members (4) and (5) and the left and right frames at high temperatures such as in summer. The members (6) and (7) are elongated in the longitudinal direction due to thermal expansion, so that, for example, one of the vertical and horizontal frame members at one corner of the window frame is significantly elongated, and the PC panel main body enters the corner in the longitudinal direction. When the part is pressed, or when both the vertical and horizontal frame materials expand significantly, and when the corner of the PC panel body is pressed in the direction of the resultant force of both expansion, the pressing force is elastically damped. It is almost absorbed by the material (13) and suppresses the pressing force applied to the PC panel main body, thereby preventing the occurrence of cracks.

[0009]

According to the structure for preventing cracks of a PC panel with a metal frame of the present invention, the frame material constituting the metal frame extends in the longitudinal direction due to thermal expansion and presses against the opening corner of the PC panel body. When the pressure is applied, the pressing force is almost absorbed by the elastic cushioning material, so that the occurrence of cracks in the corners inside the PC panel body can be sufficiently prevented.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a PC panel with a window frame according to the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 PC panel with aluminum window frame 2 PC panel main body 3 Opening 4 Upper horizontal frame material 5 Lower horizontal frame material 6 Left vertical frame material 7 Right vertical frame material 8 Window frame 13 Elastic cushioning material

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E06B 1/56 E04C 2/46

Claims (1)

(57) [Claims] 1. A PC panel with a metal frame, comprising a PC panel body having a rectangular opening, and a frame made of metal upper and lower horizontal frame members and left and right vertical frame members attached to the inner periphery of the opening portion. At the corners, the elastic cushioning material that absorbs the longitudinal extension of the frame material is filled in place of concrete over a range corresponding to at least each longitudinal end face of the vertical and horizontal frame materials located at the corners. Crack prevention structure of PC panel with metal frame.