JPH0248567Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a lightweight aerated concrete panel in which a screw tube is embedded that is fixed to a building via bolts, and is particularly designed to allow easy confirmation of the position of the screw tube from the outside. It is something.

Lightweight aerated concrete is made by mixing powder of siliceous raw materials such as silica stone, silica sand, or slag with powder of calcareous raw materials such as cement or lime, and adding water and foaming agents. After foaming, it was cured in an autoclave. Generally, this lightweight aerated concrete is often formed into panel shapes and is used as wall materials for buildings.

In order to fix such lightweight aerated concrete panels to pillars, beams, etc. of buildings, various structures have been considered. For example, a method disclosed in Japanese Patent Publication No. 49-36384 is known in which an embedding fitting provided with a threaded tube into which a bolt for fixing the panel is screwed in from the outside is embedded in a lightweight aerated concrete panel. However, with this panel, it is not possible to directly confirm the position of the screw tube from the outside, so the buried position of the screw tube is determined in advance, and this buried position is estimated using a measurer, etc.
The end face of the threaded cylinder is exposed by counterbore processing. Normally, lightweight aerated concrete panels are cut into thin semi-plastic blocks before being cured in an autoclave, so there is a problem with cutting accuracy, so it is necessary to expose the end of the threaded tube to the cut end in advance. This was fundamentally impossible, and it was necessary to carry out counterbore processing as described above.

As a result, with conventional lightweight aerated concrete panels, it is necessary to measure the dimensions of the panel to estimate the buried position of the threaded tube, and then use counterbore processing to expose the end surface of the threaded tube to the outside, which is not only complicated but also In some cases, the expected buried position of the screw tube was incorrect.

In view of the problem of embedded metal fittings in conventional lightweight aerated concrete panels, the present invention allows the position of the threaded cylinder to be extremely easily confirmed from the outside, and in some cases, allows the end face of the threaded cylinder to be removed from the outside without the need for counterboring. The purpose is to provide lightweight aerated concrete panels that can be exposed to

The structure of the lightweight aerated concrete panel of the present invention that achieves this purpose includes an embedded fitting having a threaded tube into which a bolt for fixing the panel is screwed from the outside, and an end face of the threaded tube on the side into which the bolt is screwed. A porous rubber-like elastic material that is attached to the threaded cylinder so as to close the threaded hole formed therein and that does not melt due to the heat associated with autoclave curing is embedded therein.

Therefore, according to the present invention, a porous rubber-like elastic material is interposed between the threaded tube and the surface of the lightweight cellular concrete panel, so that it is extremely easy to screw the panel surface by percussing it with a hammer or the like. It is possible to confirm the position of the cylinder from the outside, and if the distance between the panel surface and the end face of the porous rubber-like elastic material is short, the counterbore hole can be destroyed with a hammer etc. without counterboring. can also be formed.

Hereinafter, an embodiment of the lightweight cellular concrete panel according to the present invention will be described in detail with reference to FIGS. 1 to 3.

As shown in Figure 1 showing the fractured state of this example and Figure 2 showing its cross-sectional structure, lightweight aerated concrete panels (hereinafter referred to as ALC panels)
A reinforcing bar formed in a basket shape by horizontal bars 11 and vertical bars 12 is buried inside the bar 10, and a set of four arms 13 are connected to the horizontal bars 11 in a locked state in this embodiment. There is. These radial arms 13 are integrally attached with screw tubes 14 into which bolts (not shown) for fixing the panel are screwed in from the outside, and the screw tubes 14 and the arms 13 constitute an embedded fitting. As for the means for connecting the embedded metal fitting to the reinforcing bar and the shape of the embedded metal fitting itself, in addition to the present embodiment, conventionally known methods such as those disclosed in Japanese Utility Model Publication No. 14733/1988 can be used as they are. A screw hole 1 is provided on the end surface of the threaded cylinder 14 on the side into which the aforementioned bolt is screwed, covering the end surface of the threaded cylinder 14.
In this embodiment, a porous spongy neoprene rubber 16 that closes the 5 is attached via an adhesive, and the thickness of this spongy neoprene rubber 16 is such that the distance L from its end face to the surface of the ALC panel 10 is It is desirable to set it to about 5 mm to 9 mm. In this example, spongy neoprene rubber 16 was used as the rubber-like elastic material.
It is sufficient that the porous body is made of a material that does not melt at about 180° C., which is the temperature at which the ALC panel 10 is cured in an autoclave. This spongy neoprene rubber 1
In this embodiment, a spongy neoprene rubber 17 is also pasted on the end face of the threaded cylinder 14 opposite to the end face on which the screw thread 6 is pasted, to prevent concrete from flowing into the screw hole 15 from this end face side. However, you can simply attach adhesive tape to the end surface on this side.
Also, the spongy neoprene rubber 16 is formed into a bolt shape, and the spongy neoprene rubber 16 is inserted into the screw hole 15.
A similar effect can be obtained even if part of 6 is filled.

As shown in FIG. 3, which shows the appearance of the ALC panel 10, the spongy neoprene rubber 16 shrinks due to the heat associated with autoclave curing, so a cavity is formed in a part of it, and the spongy neoprene rubber Since the thickness of the concrete up to the end face of the screw tube 16 is 5 mm to 9 mm, it is possible to easily index the position of the screw tube 14 by percussing this part with the worker's fist, hammer 18, etc. Then, the concrete part from the surface of the ALC panel to the end face of the spongy neoprene rubber 16 can be destroyed very easily using the hammer 18 described above, and the spongy neoprene rubber 16 can be peeled off from the screw tube 14 and removed from the outside. can be taken out.

In this embodiment, the spongy neoprene rubber 16 was attached to the screw tube 14 using an adhesive, but a part of the spongy neoprene rubber 16 was attached to the screw hole 1.
It is also possible to integrate it with the threaded cylinder 14 by fitting it into the threaded cylinder 5.

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view showing the internal structure of the lightweight aerated concrete panel according to the present invention, Fig. 2 is a cross-sectional view of its main parts, and Fig. 3 is a conceptual diagram showing the principle of position indexing work of the screw cylinder. , with the symbols in the figure, 10 is the ALC panel, 11 is the horizontal stripe, 12 is the vertical stripe,
13 is an arm, 14 is a screw cylinder, 15 is a screw hole, 1
6 is spongy neoprene rubber.

Claims (1)

[Scope of utility model registration request] An embedded fitting having a threaded tube into which a bolt for fixing a panel is screwed from the outside, and an embedded fitting having a threaded tube into which the bolt is screwed, and which is attached to the end surface of the screw tube on the side into which the bolt is screwed so as to close a screw hole formed in the screw tube, and is autoclaved. A lightweight aerated concrete panel embedded with porous rubber-like elastic material that does not melt due to the heat associated with it.