JPH0339528Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is an embedded metal fitting for precast concrete curtain wall (PC curtain wall),
In particular, it is attached to a steel framework to form the outer wall of a building, etc.
This paper concerns improvements to the mounting structure of PC curtain walls.

(Prior art and its problems) Conventionally, as a method of fixing embedded hardware fixed to the lower part of a PC curtain wall, a method was used in which bent main reinforcing bars were fixed to the embedded hardware as anchor bars, and as an improved method, anchor reinforcing bars were used. There is a method of fixing the moon's smooth anchor plate to embedded metal fittings,
Although these are suitable for fixing the lower fasteners, they lack the pull-out strength of the anchor reinforcing bars and do not have sufficient peel strength as a fixing structure for the upper fasteners of a hanging PC curtain wall.

(Problem of the invention) The object of the invention is to provide an embedded metal fitting that provides pull-out strength and peel strength that can be used as a fixing structure for the upper fastener of a hanging PC curtain wall.

(Summary of the invention) This invention uses two wing parts as an anchor flange.
1 and 21 and a leg 22 protruding perpendicularly from the center of both wings, the anchor flange has a T-shaped cross section, which increases the embedding area and bearing pressure area of the anchor flange.
Since the at least one pair of anchor reinforcing bars 3, 3 extending below the PC curtain wall can be arranged with appropriate spacing, the adhesion strength of the anchor reinforcing bars 3 to concrete can be improved. Together with this, we discovered and completed a fastener mounting structure with sufficient pull-out strength and peel strength that can be used as a fixing structure for the upper fastener of a hanging PC curtain wall even without horizontal anchor reinforcing bars. .

(Structure of the invention) The present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a cross-sectional side view showing a fastener installation structure using an embedded metal fitting according to the present invention, Fig. 2 is a rear view thereof, Fig. 3 is a perspective view of the main part thereof, and Fig. 4 is a embedding structure of the present invention. FIG. 2 is a cross-sectional side view showing a state in which a hanging PC curtain wall is attached using a fastener attachment structure using hardware. In the drawing, a fastener 1 with a flange 11 having a fixing bolt hole 12 protruding from the inner surface of a PC curtain wall W1 is fixed to a steel frame I with a bolt FB via a joint J, and
1 is suspended and supported, while a part of the fastener 1 protrudes upward from the water return rising part 5, and
Lightning-shaped locking member 4 arranged and fixed at the bottom of PC curtain wall W2 with anchor bolt AB
The upper and lower PC curtain walls are connected to each other (see Figure 4). In such a hanging PC curtain wall, when the fastener 1 is fixedly attached via an anchor member, in the present invention, both wing parts 21,
21 and legs 22 that protrude vertically from the center of both wings.
An anchor flange 2 having a T-shaped cross section consisting of
The legs 22 are welded to vertically protrude from the anchor flange 3, and the tips of at least one pair of anchor reinforcing bars 3, 3 are welded to the wing parts 21, 21 of the anchor flange, respectively. ，
7, the PC curtain wall W1 extends downwardly (see FIG. 1).

(Effect of the invention) In the fastener attachment structure configured as described above, a T-shaped cross section consisting of both wing parts 21, 21 and a leg part 22 vertically protruding from the center of both wings is used as an anchor flange, so the horizontal anchor reinforcing bar The anchor embedding area and bearing pressure area can be increased without using the anchor flange, and at least one pair of anchor reinforcing bars 3, 3 extending from both wings of the anchor flange to the lower part of the PC curtain wall can be arranged with an appropriate interval. As a result, the adhesion strength of the anchor reinforcing bars 3 to concrete is improved, and the fastener has sufficient pullout strength and peel strength to be used as a fixing structure for the upper fastener of a hanging PC curtain wall. A mounting structure can be provided.

Furthermore, since there is no need to attach horizontal anchor reinforcing bars, the anchor embedding work can be simplified and the manufacturing cost of the PC curtain wall can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view showing a fastener installation structure using an embedded metal fitting according to the present invention, Fig. 2 is a back view thereof, Fig. 3 is a perspective view of the main part thereof, and Fig. 4 is an embedded structure according to the present invention. FIG. 2 is a cross-sectional side view showing a state in which a hanging PC curtain wall is installed using a fastener installation structure using metal inserts. 1... Fastener, 2... Anchor flange,
3... Anchor reinforcing bar, 4... Locking hardware.

Claims (1)

[Scope of Claim for Utility Model Registration] In a mounting structure in which a fastener, in which a flange with fixing bolt holes protrudes from the inner surface of a PC curtain wall, is fixed via an anchor member, the anchor member is attached to both wing portions 21, 21 and from the center of both wings. A cross section T consisting of vertically protruding legs 22
An embedded metal fitting for a PC curtain wall, characterized in that it consists of a letter-shaped anchor flange 2 and at least a pair of anchor reinforcing bars 3, 3 arranged extending downward from the wing parts 21, 21 of the anchor flange.