JP2001032384A - Joint metal for concrete panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To install a lid body to a joint metal with single operation by forming a plate-shaped joint metal plate to an octagonal shape in plan view, providing a lid body attaching portion to an octagonal opening in plan view and inserting and fixing a lid body having the shape almost as same as that of the opening to the attaching portion for lid body. SOLUTION: Laterally long metal plates 3, 3 are folded and bent and formed to an octagonal shape in plan view by using two plates as one set. Next, a gap members 4, 4 made of wires or the like are interposed in a portion to be connected together by overlapping both the ends thereby forming a gap, and the metal plates 3, 3 are fixed by welding or the like. The lid body 6 is constituted with a metal plate having the shape almost the same as the octagonal opening portion 2a of the joint metal 2. A central portion of a pair of sides facing is respectively folded and bent downward thereby forming bent portions which are then inserted to gaps formed by interposing a gap member 4. Thus, the lid body can be easily attached to the joint metal by single operation and the lid body can be definitely fixed to the joint metal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal structure for joining concrete panels for walls of a prefabricated building.

[0002]

2. Description of the Related Art Conventionally, in a structure for joining a concrete panel for a wall made of a PC board or the like in a prefabricated building, metal fittings are incorporated at four corners of the concrete panel, and the metal fittings of each concrete panel are connected to each other by connecting bolts and nuts. The structure for connecting the concrete panels through the piers is known in the art.

[0003]

However, in the conventional structure in which the metal joint is incorporated into the concrete panel, the strength of the portion where the metal joint is incorporated in the concrete panel cannot be ensured, and the four corners in which the metal joint is incorporated are not provided. There was a problem that the chip was broken or broken by an external force. If the concrete panel is chipped or cracked, it needs to be repaired, which takes a lot of trouble and causes a delay in the construction period. Therefore, an object of the present invention is to provide a metal joint in which chipping or cracking due to external force does not occur at four corners of a concrete panel.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, according to claim 1, in the structure of metal fittings installed at the four corners of a concrete panel for a wall of a prefabricated building, and joining the concrete panels to each other or to an anchor, the joining metal fitting is formed into a plate-like metal plate in a plan view. It is formed by bending into a rectangular shape, a lid mounting portion is provided in the opening of the octagon in plan view, and a lid having substantially the same shape as the opening can be inserted and fixed in the lid mounting portion. In claim 2, a plurality of protrusions are formed on the surface of the lid.

[0005]

Next, an embodiment of the present invention will be described. FIG. 1 is a perspective view showing a state in which a concrete panel is erected in a prefabricated building, FIG. 2 is a perspective view showing a configuration of a joint of the concrete panel, and FIG. 3 is a view showing a lid of the joint of the concrete panel. 4 is a diagram showing a state in which the metal joint is assembled into the concrete panel, FIG. 5 is a diagram viewed from the longitudinal direction, FIG. 6 is a diagram also viewed from the lateral direction, and FIG. FIG. 8 is an enlarged view showing a connection state of the joining hardware.

As shown in FIG. 1, a wall 20 of a prefabricated building is made of a concrete panel 1 made of a PC board or the like.
・ It is composed by joining and building according to the process procedure. Each concrete panel 1.1
As shown in FIG. 8, the joints / buildings of the joints are assembled at the four corners of each concrete panel 1.
Is connected and fixed to the concrete panel 1 via the connecting bolt 10 and the nut 11 and is connected and fixed to the anchor bolt 22 of the foundation 21.

Referring to FIG. 2, the structure of the metal joint will be described. The metal joint 2 is a horizontally long plate-shaped metal plate 3.
Are bent to form an octagon in plan view, and a gap 5 is formed by interposing gap members 4 made of a wire or the like at a portion where both ends are overlapped and connected to each other, and welding is performed. It is configured by fixing the metal plates 3, 3 and the like. With this configuration, the metal joint 2 has upper and lower octagonal openings 2a in plan view, and the lid 6 is attached to the one opening 2a.

The plate-shaped metal plates 3, 3 are formed by connecting the both ends of the metal plate 3 at the upper and lower portions, and connecting holes 3a, 3a, 3a, 3a are opened at the upper and lower positions and the corresponding left and right positions. I have. The connection holes 3a, 3a, 3a, 3a
Holes connecting the reinforcing bars 24 arranged vertically and horizontally in the concrete panel 1 shown in FIG. 4, holes connecting the foundation 21 shown in FIG.
It is used as a hole to connect with the adjacent concrete panel 1. The horizontally long plate-shaped metal plate 3 is bent at four places, and the connection holes 3a.
3a are opened. The metal piece 3 having an octagonal shape in plan view can be formed by welding and fixing the single metal plate 3 as a set of two pieces facing each other.

The lid 6 is, as shown in FIGS.
It is made of a metal plate having substantially the same shape as the octagonal opening 2a of the metal joint 2, and the central portions of a pair of opposing sides are bent downward (vertically). By inserting the two bent portions 6a into the gaps 5.5 formed by interposing the gap members 4 of the joint hardware 2, the lid 6 can be attached to the joint hardware 2 with one touch. Make up. On the outside of the middle of the bent portions 6a on both sides of the lid 6, claws 6b are formed to protrude.
The claw portions 6b prevent the lid 6 from dropping out of the gaps 5.5 of the metal joint 2, so that the lid 6 can be securely fixed to the metal joint 2. In this manner, the metal joints 1 are provided with the gaps 5.5, which are lid mounting portions for mounting and fixing the lid 6.

A plurality of slit-like projections 6c are provided on the surface of the lid 6, and the projections 6c which are elongated in a side view and are bent in a triangular shape, as shown in FIG. When the concrete panel 1 is manufactured, the metal joints 2 with the lids 6 attached thereto are integrated into the four corners, and are integrally fixed when concrete is cast and reinforced with each other. When assembled, they have a function as an anchor. .
In addition, when the concrete panel 1 is hung, the occurrence of chipping or cracking due to external force can be prevented.

In the present embodiment, the slit-shaped projections 6c on the surface of the lid 6 are provided at six places, but the number, the position, the shape, and the like are not particularly limited. In addition, the gap 5 formed in the metal joint 2 is formed such that a gap member 4 made of a wire or the like is temporarily fixed in advance at one end of the horizontally long plate-shaped metal plate 3 so as to be interposed at the time of welding and fixing. Alternatively, it may be formed by forming.

As shown in FIG. 4, FIG. 5, FIG. 6, and FIG. 7, the joint hardware 2 is arranged so that the octagonal opening 2a can be seen from the back side at the four corners of the concrete panel 1. The streaks 23 are connected and supported and placed in the formwork, and are poured into concrete to be incorporated into the concrete panel 1. At this time, the projections 6c on the surface of the lid 6 attached to the metal joint 2 function as anchors to the concrete panel 1 to secure the strength of the four corners of the concrete panel 1 and improve the finish on the surface side. Can be. As described above, by constructing the concrete panel 1 with a good finish on the front side, the finish of the exterior to be performed in a later step becomes good.

[0013]

As described above, the present invention has the following advantages. That is, as in claim 1, in the structure of metal fittings to be incorporated into the four corners of the concrete panel for the wall of the prefabricated building and to join the concrete panels to each other or to the anchor, the joining metal fitting is formed into a plate-like metal plate in plan view. The cover body is formed by being bent into an octagon, a lid mounting portion is provided in the opening of the octagon in plan view, and a lid having substantially the same shape as the opening can be inserted and fixed in the lid mounting portion. Can be easily attached to the metal joint with a single touch, and the lid can be securely fixed to the metal joint.

According to a second aspect of the present invention, since a plurality of projections are formed on the surface of the lid, in addition to the effect of the first aspect, when the metal joint is installed at the four corners of the concrete panel, When a plurality of protrusions on the body surface and concrete are assembled as a unit, they have a function as an anchor, and when a concrete panel is suspended, chipping or cracking due to external force can be prevented. . In addition, since the concrete panel can be prevented from being chipped or cracked, labor for repair can be omitted, and the construction period can be prevented from being delayed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a concrete panel in a prefabricated building is laid.

FIG. 2 is a perspective view showing a configuration of a metal joint of the concrete panel.

FIG. 3 is a view showing a lid of a metal joint of a concrete panel.

FIG. 4 is a view showing a state in which a metal joint is assembled into a concrete panel.

FIG. 5 is a view similarly viewed from the longitudinal direction.

FIG. 6 is a view also seen from the short side direction.

FIG. 7 is an enlarged view of a portion where the joint hardware is incorporated in a concrete panel.

FIG. 8 is a view showing a connection state of a metal joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete panel 2 Joining hardware 5 Lid mounting part (gap) 6 Lid

Claims (2)

[Claims] 1. A metal structure which is incorporated at four corners of a concrete panel for a wall of a prefabricated building and is bonded to the concrete panels or to an anchor, wherein the metal structure is formed by bending a plate-shaped metal plate into an octagon in plan view. And a lid mounting portion is provided in the octagonal opening in plan view, and a lid having substantially the same shape as the opening can be inserted and fixed in the lid mounting portion. hardware. 2. The metal joint of a concrete panel according to claim 1, wherein a plurality of projections are formed on a surface of said lid.