JPS6215379Y2 - - Google Patents

Description

[Detailed description of the invention] This invention mainly relates to precast concrete boards (hereinafter referred to as PC boards) used for curtain walls.

This type of PC board has metal attached to the periphery of a reinforced concrete board, but such PC boards have an unsightly appearance and have the disadvantage that the metal peels off due to differences in thermal expansion coefficients. Furthermore, there was a drawback that a watertight and airtight rubber material had to be attached to the metal.

This invention was devised to eliminate these drawbacks, and its purpose is to provide a PC board that has a good appearance, allows easy formation of joints, and can be manufactured at a relatively low cost.

The PC board according to this invention is one in which fiber-reinforced concrete such as carbon fiber-reinforced concrete is integrally provided on the peripheral edge of a board made of reinforced concrete.

This invention will be explained below based on an illustrated embodiment. As shown in Figure 1, the PC according to this invention
The board is reinforced concrete board 1 (hereinafter referred to as RC board)
and a carbon fiber reinforced concrete frame 2 (hereinafter referred to as CFRC frame) which is integrally provided on the peripheral edge of this RC board 1. The CFRC frame 2 and the RC board 1 are integrally constructed by a dovetail joint 3.

What is shown in Fig. 2 is the horizontal joint of a PC board with such a configuration, and the upper CFRC has a cross-section approximately at the lower edge with a protrusion 4 provided at the bottom of the upper PC board and protruding downward on the outdoor side. It is composed of a frame 2A and a lower CFRC frame 2B having a substantially upper edge in cross section with a protrusion 5 provided on the upper part of the lower PC board and rising upward on the indoor side.

In such a configuration, the protrusion 4 and the protrusion 5
An equal-pressure space with the outside air is formed between the gasket 12 and the gasket 12, which alleviates the blowing of wind and prevents water droplets from rising due to the diagonally downward protruding ridges 8 and 9 that serve as water deflectors. 13 maintains watertightness and airtightness.

Next, FIGS. 3 and 4 show vertical joints, in which the side CFRC frame 2C of one PC board has a roughly L-shaped cross section with a protrusion 14 on the indoor side, and the other The side CFRC frame 2D of the PC board has a substantially L-shaped cross section with a protrusion 15 on the outdoor side.
Dovetail grooves 16 and 17 are provided on opposite side surfaces of the protrusions 14 and 15, respectively, and the frame 2D and the frame 2
Dovetail grooves 18 and 19 are also provided on the opposite side surface of C at the portions opposite to the dovetail grooves 16 and 17, respectively.
Gaskets 20, 21, 22, and 23 are attached to 9. Further, as shown in FIG. 3, a large number of protrusions 24 having a downward slope toward the outdoor side are formed on the opposing side surface between the dovetail groove 19 and the protrusion 14 in the frame 2C, so that the rainwater that has entered is directed toward the outdoor side. It is made to fall downward. A similar protrusion 24 is also formed on the frame 2D. Such protrusions 24 are stamped with a press after extrusion molding of the frame 2 and before hardening.

Since the frames 2A, 2B, 2C, and 2D described above are manufactured by extrusion molding, the above-mentioned protrusions,
Dovetail grooves and water return protrusions can be easily formed. In addition, when manufacturing such a PC board, the extruded frames 2A, 2B, 2C, and 2D are framed in the shape of a picture frame, and these frames are used as side forms to arrange reinforcing bars and pour concrete. Become.

In addition to carbon fiber, reinforcing fibers for the frame include glass fiber, asbestos, and the like.

This invention has the above-mentioned configuration and has the following effects.

Both the main body and frame are made of concrete, giving it a good appearance.

The frame is formed by extrusion molding, and complex-shaped joints can be easily formed, making mass production possible and making PC boards relatively inexpensive.

Since the frame is made of fiber-reinforced concrete, the amount of reinforcing material for the PC board can be reduced.

In addition to eliminating the need for side forms, the blowing of wind from side joints in the wall is alleviated, and water droplets are prevented from rising.

[Brief explanation of the drawing]

Figure 1 is a front view showing the PC board according to this invention.
Figure 2 is a sectional view showing the horizontal joints of a similar PC board, Figures 3 and 4 are perspective views showing the vertical joints,
FIG. 1...RC board, 2, 2A, 2B, 2C, 2D...
...CFRC board, 3...Dovetail joint, 4, 5...Protrusion part,
6, 7... Slant surface, 8, 9... Water return protrusion,
10, 11... Dovetail groove, 12, 13... Gasket, 14, 15... Projection, 16, 17, 18,
19...Dovetail groove, 20, 21, 22, 23...Gasket, 24...Protrusion.

Claims (1)

[Scope of utility model registration request] The lower edge of the precast concrete plate, which is made by integrally forming extruded fiber-reinforced concrete on the peripheral edge of the reinforced concrete plate with dovetail joints, is approximately L-shaped in cross section and has a protrusion that protrudes downward on the outdoor side. The upper edge of the concrete plate has an approximately L-shaped cross section with a protrusion that rises upward on the indoor side, and the former protrusion has an indoor side and the latter protrusion has an outdoor side. A precast concrete board characterized by having several protrusions that protrude diagonally downward.