JPH0718770A - Fastener for carbon fiber reinforced concrete panel - Google Patents

Abstract

PURPOSE:To prevent electric corrosion to ensure durability and to reduce a cost by mounting a strap between an external steel component and a carbon fiber reinforced concrete to provide a space. CONSTITUTION:A strap 7 is placed between a carbon fiber reinforced concrete panel 1 and a metal fixture 3 to provide a space, and direct contact of a steel component with a reinforced concrete is prevented. At that time, the strap 7 is formed of rust-resisting substance such as stainless steel, etc., and if the shape of a fastener can form a space, any limitation is unnecessary The stainless steel product is used for an imbedded bolt 4 on a carbon fiber reinforced concrete side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener for carbon fiber reinforced concrete panel.

[0002]

2. Description of the Related Art In recent years, carbon fiber reinforced concrete panels (hereinafter referred to as CFRC panels) have been used as curtain walls generally used as wall surfaces of buildings. At this time, the fastener used for attaching the CFRC panel as a wall surface is generally made of stainless steel. This is because the fastener made of steel may cause electrolytic corrosion due to the difference in ionization tendency between iron and carbon. Since the fastener is integrated with the CFRC panel, it is entirely made of stainless steel. However, in such a fastener, since stainless steel, which is more expensive than steel, is used, there is a problem that the cost is inevitably increased. In order to respond to this, for example, as shown in FIG. 3, only the portion embedded in the CFRC panel is made of stainless steel, the other portion is made of steel, and C
The cost was reduced by providing a coating film on the steel part that is in direct contact with the FRC panel, or by attaching a film or tape.

[0003]

However, when such a method is used, the CFRC panel and the steel come into direct contact with each other due to the peeling of the coating film or the tearing of the film or tape over time, which causes electrolytic corrosion. There was a problem that destruction due to

[0004]

The inventors of the present invention have made earnest studies on a method for preventing electrolytic corrosion that is substantially unaffected by changes over time.
The inventors have found that the problem can be solved by making the FRC portion inaccessible, and have reached the present invention. That is, an object of the present invention is to provide a fastener for a CFRC panel that is inexpensive and resistant to aging. An object of the present invention is to make a part having a portion embedded in carbon fiber reinforced concrete (CFRC) made of stainless steel, A CFRC panel fastener comprising a plurality of steel parts which are entirely outside the CFRC after mounting, wherein a pad plate for providing a space between the steel part and the CFRC is provided. Easily achieved with a fastener for.

The present invention will be described in more detail below. A schematic view of an example of the fastener for CFRC panel of the present invention is shown as FIG. The shaded parts are parts made of stainless steel. The present invention is a fastener for fixing a carbon fiber reinforced concrete panel 1 to a building 2. This fastener is basically composed of a mounting member 3, a CFRC side embedded bolt 4, a building side embedded bolt 5, and a nut 6. And the conventional CFRC panel fastener is
As a countermeasure against electrolytic corrosion, the mounting bracket 3 and the CFRC side embedded bolt 4 were made of stainless steel. However, in the fastener of the present invention, by interposing the mounting plate 3 made of a material such as stainless steel which does not easily rust between the mounting bracket 3 and the CFRC panel 1, the mounting bracket 3 and the CF
A space is formed between the RC panels 1 and, as a result, the fitting 3 does not have the problem of electrolytic corrosion. In the conventional method of coating the surface, there is always a possibility of causing electrolytic corrosion due to the damage of the coating layer, but in the present invention, the CFRC panel 1 and the mounting bracket 3 are separated by a space. Therefore, there is no possibility that such a problem will occur. Therefore, the mounting member 3 can be made of steel, which is very advantageous in terms of cost.

The material of the backing plate 7 is not particularly limited as long as it does not cause the problem of electrolytic corrosion, but is preferably made of stainless steel from the viewpoint of strength and cost. And the shape of the backing plate 7 is
The shape is not particularly limited as long as it forms a space between the fitting 3 and the CFRC panel 1, and various shapes such as a thin plate shape, a nut shape, and a donut shape as shown in FIG. A thin plate shape or a nut shape is preferable because the advantage of cost reduction is lost when the shape is complicated.

In the present invention, the fitting 3 and the CFRC
The distance of the panel 1 is not particularly limited as long as it is not in contact, but it is preferably 0.5 mm or more at the closest portion, and more preferably 1 to 10 mm. If it is less than 0.5 mm, when it is used at a site where condensation or the like is likely to occur, there is a possibility that the structure of the present invention, that is, the space is isolated, may collapse. Again 1
If it exceeds 0 mm, there is almost no difference in the effect, so that the wall thickness and the material are likely to be wasted.

The CFRC-side embedded bolt 4 may be made of ceramics or the like, but is preferably made of stainless steel, and its thickness may be arbitrarily selected by those skilled in the art within the range of common sense.
More preferably, the fall-out prevention treatment may be performed in some form. Since the CFRC-side embedded bolt 4 and the building-side embedded bolt 5 may be mixed when they have substantially the same shape, it is preferable to provide a determining means such as changing the shape or color-coding. Is preferred. The nut 6 is not particularly limited, and a commonly used nut can be used. When the building side is also CFRC, a space may be similarly provided on the building side.

[0009]

According to the present invention, it is possible to obtain a fastener for carbon fiber reinforced panel, which is cheaper than the conventional fastener for carbon fiber reinforced panel and resistant to aging.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a fastener for CFRC of the present invention.

FIG. 2 is an explanatory view showing an example of the shape of a backing plate used in the CFRC fastener of the present invention.

FIG. 3 is an explanatory view showing an example of a conventional CFRC fastener.

[Explanation of symbols]

 1 Carbon Fiber Reinforced Panel 2 Building 3 Mounting Bracket 4 CFRC Side Embedded Bolt 5 Building Side Embedded Bolt 6 Nut 7 Pad Plate 8 Bolt Through Hole

Claims (1)

[Claims] 1. Carbon fiber reinforced concrete (CFRC)
In a fastener for a CFRC panel, which is made up of a plurality of parts in which a part having an embedded part is made of stainless steel, and a part externally attached to the CFRC is made of steel, a space is provided between the steel part and the CFRC. CFR characterized by providing a backing plate for
Fastener for C panel.