JPH0339529Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a PC curtain wall embedded metal fitting,
In particular, it concerns improvements in the installation of hanging PC curtain walls.

(Prior art and its problems) Conventionally, in the hanging construction method of a PC curtain wall, as shown in FIG. The lower end of the upper PC curtain wall W2 is connected to the L by using the so-called concrete jaw support method, in which the lower surface is supported by bolts B that protrude vertically from It is common to connect and fix the structure using the anchor bolt AB and the fixing bolt FB via the shaped mounting hardware F2. However, forming the hanging protrusion S on the inner surface of the upper part of the PC curtain wall W1 increases the weight of the PC curtain wall.
In addition, there are disadvantages such as an increase in the amount of dead space on the indoor side.

Therefore, an embedded structure has been proposed in which the hanging protrusion S is not provided and the structural hardware is connected to the anchor reinforcing bars of the PC curtain wall. However, as shown in FIG.
Attach the letter-shaped mounting bracket 2 to the rising edge 1 of the water return located behind the upper edge of the PC curtain wall.
In the method of joining the upper and lower PC curtain walls, the structural fittings are fixed in a partially protruding state from 1 and hooked to the locking fittings 7 arranged and fixed at the lower end of the upper PC curtain wall. 11 is physically impossible, and if the mounting bracket 2 with a T-shaped cross section is simply fixed with an anchor bolt or the like, the upper wing portion 21 of the mounting bracket 2 with a T-shaped cross section will be in a latched form. Therefore, the problem arises that the peel strength and pull-out strength of the anchor are insufficient.

(Problem for the invention) The present invention is based on the mounting structure of a hanging PC curtain wall of the type shown in Fig. 3 above.
The objective is to improve the shape of anchor reinforcing bars without using structural hardware, and to provide embedded hardware suitable for improving the suspended mounting structure of PC curtain walls with high pull-out and peel strength.

(Summary of the invention) In order to solve the above-mentioned problems, the present invention has been developed as a result of intensive research, and in the hanging type PC curtain wall 1 having a raised edge 11 at the rear of the upper edge, the lower end of the upper PC curtain wall Considering that it is a good idea to use a mounting bracket 2 with a T-shaped cross section to connect the locking bracket fixed to the upper end of the lower PC curtain wall,
The upper part of the anchor device 3, which extends downward from the vicinity of the raised end 11 of the PC curtain wall and is buried, is bent at least twice from the tip,
In addition to improving the pull-out strength of the anchor device 3, the first forward bending portion 3 of the anchor device 3
The first and second front bent portions 32 are exposed from the inner surface of the PC curtain wall 1, and the leg portions 22 of the mounting bracket 2 having a T-shaped cross section are inserted through the exposed first and second bent portions 31 and 32. Each wing section 21 sandwiching the
The purpose of this product is to adhere to PC in a well-balanced manner and improve peel strength from PC curtain walls.
It is in the embedded hardware for curtain walls.

(Structure of the invention) Hereinafter, the invention will be explained in detail based on a specific example thereof.

Figure 1 shows a PC using the embedded hardware according to the present invention.
2 is a cross-sectional side view of a hanging type installation structure of a curtain wall, and FIG. 2 shows its anchor device 3 and cross-section T.
FIG. 3 is a back view showing a state of connection with a letter-shaped mounting fitting 2;

As shown in the drawing, the PC curtain wall 1 has a raised end 11 at the rear of the upper edge, and inside the curtain wall 1 there are two main reinforcing bars 4, 4 arranged in a lattice pattern, and the main reinforcing bars stop. They are three-dimensionally combined and buried at the striations 5. Intermediately between the main reinforcing bars 4, 4 is an anchor device, for example, a steel band or a reinforcing bar 3 (hereinafter, an anchor reinforcing bar will be explained as an example), extending downward from the vicinity of the raised end 11 of the PC curtain wall. .)
The upper part of the is bent at least twice from the tip, and the first forward bent part 31 and the second forward bent part 32 are bent at least twice.
While being exposed from the inner surface of the PC curtain wall 1, horizontal anchor reinforcing bars 6, 6 are combined at the first rear bending part 33 and the second rear bending part 34. The pair of parallel anchor reinforcing bars 3, 3 have both wing portions that contact the inner surface of the curtain wall with respect to the first front bent portion 31 and the second front bent portion 32 that are exposed from the inner surface of the PC curtain wall 1. 21, 21 and a leg part 22 having a bolt hole 23 protruding laterally from the center of both wing parts. With a part of the part 21 protruding, the leg part 22 is fixedly secured across the wing parts 21 sandwiching the leg part 22. As shown in FIG. 3, the lower edge of the PC curtain wall 1' is arranged with a certain gap at the upper edge of the PC curtain wall 1, and the lower edge of the PC curtain wall 1 is connected to the edge 11 of the PC curtain wall 1. Upper wing section 21 with a part of upper wing section 21 protruding and upper PC curtain wall 1
The upper and lower PC curtain walls 1 and 1' are joined together by engaging the locking fittings 7 of '. Note that 8 is a wind barrier consisting of a pair of regular seals.

(Operation and Effect of the Invention) As is clear from the above explanation, according to the present invention, the PC curtain wall for hanging type installation 1
In this case, when using the mounting bracket 2 having a T-shaped cross section for connecting the locking bracket fixed to the lower end of the upper PC curtain wall and the upper end of the lower PC curtain wall, the rising end of the water return of the PC curtain wall 1 is used. From section 11 to upper wing section 21
According to the conventional method, there was a problem in the strength of attaching the mounting bracket 2 having the T-shaped cross section to the lower PC curtain wall 1 because a part of it protrudes. , bent at least twice from the tip, and the first bent part 3
Since the first and second bent portions 32 are exposed from the inner surface of the PC curtain wall 1 and fixed in a well-balanced manner to the anchor device 3 such as an anchor reinforcing bar with improved pull-out strength, the peel strength is also improved. Also,
By bending the anchor reinforcing bars, etc., it can be fixed to the T-shaped mounting bracket PC curtain wall without using other anchor members, which not only simplifies the manufacture of the PC curtain wall, but also reduces manufacturing costs. . Therefore, it is possible to provide an extremely practical hanging structure for PC curtain walls.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view of a mounting structure using embedded metal fittings according to the present invention, Fig. 2 is a back view showing the state of connection between a T-shaped cross-sectional mounting fitting and an anchor device, and Fig. 3 is a cross-sectional side view of a mounting structure using an embedded metal fitting according to the present invention. FIG. 4 is a cross-sectional side view showing a joined state of upper and lower PC curtain walls in a mounting structure using embedded hardware, and FIG. 4 is a cross-sectional side view showing a conventional hanging type PC curtain wall mounting structure. 1...PC curtain wall, 2...T-shaped mounting bracket, 3...anchor device, 21...
... wing section, 22 ... leg section, 31 ... first front bending section, 32 ... second front bending section.

Claims (1)

[Scope of utility model registration request] PC curtain wall 1 for hanging type installation with water return rising end 11 at the rear of the upper edge
In this case, a mounting bracket 2 having a T-shaped cross section, which is composed of both wing parts 21, 21 that come into contact with the inner surface of the curtain wall, and a leg part 22 having a bolt hole 23 projecting laterally from the center of both wing parts, is attached to the PC curtain wall. 1 with a portion of the upper wing portion 21 protruding from the rising end 11 of the PC.
The upper part of the anchor device 3, which extends downward from the vicinity of the raised end 11 of the curtain wall and is buried, is bent at least twice from the tip, and the first front bent part 31 and the second front bent part 32 are bent at least twice.
Exposed from the inner surface of the PC curtain wall 1,
An embedded metal fitting for a PC curtain wall, characterized in that it is firmly fixed to each wing part 21 sandwiching the leg part 22 of the mounting fitting 2 having a T-shaped cross section.