JPH0475350B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION Field of Industrial Application The present invention relates to a method for refurbishing windows in buildings, and more particularly to a method for removing metal window frames from old windows.

BACKGROUND OF THE INVENTION To renovate windows in older buildings, the old window frame must be removed and a new window frame installed. Another option is to leave the old window frame in place and install the new window frame over it. However, this method of attaching a new window frame to an old window frame is to attach and fix it to an old window frame that is already old and corroded, and it does not involve holding and fixing the entire outer periphery of the window frame to the wall opening. Instead, it is fixed to the old window frame in several places using small pieces of mounting material, so it is difficult to say that it is strong enough, and furthermore, the new window frame has to be installed on top of the old window frame.
It will be a little smaller than the old window frame, so
It is advisable to remove the old window frame and install a new window frame.

Conventionally, in order to remove a window frame, it was necessary to break down the area around the window opening in a building by chiseling. Therefore, the construction work was large-scale, labor-intensive, and took a long time. In order to eliminate these drawbacks, he proposed a method that does not require the destruction of buildings (Japanese Patent Application Laid-Open No. 59-38484). This method uses a hydraulic cylinder to forcefully pull the central part of the window frame to remove it from the window opening.

Problems to be Solved by the Invention The above conventional method uses a hydraulic cylinder to apply force to remove the product, so the hydraulic cylinder, etc. must be securely attached to the window frame by welding, etc. Has considerable skill. Furthermore, even if there are many windows, it is inefficient as each window must be treated one by one. Another problem was that it could not be used for small windows.

Needless to say, it would be desirable if any window frame could be removed more easily.

The present invention aims to achieve this.

[Structure of the Invention] Means for Solving the Problems Therefore, the present invention is characterized by using an expansion pressure generating agent. Specifically, a hole is drilled from the surface of the window frame to the inside of the mortar, and the hole is filled with an expansion pressure generating agent.The hole formed in the window frame when the hole is drilled is then closed with an airtight lid, and then left alone. This causes the expansion pressure generating agent to expand, and the expansion pressure separates the window frame from the building frame.

Function The expansion pressure generating agent filled between the frame and the window frame gradually expands. At this time, in the present invention, the hole formed in the window frame is closed with a lid, so that pressure due to the expansion is applied to the window frame, and the window frame is lifted from the frame. Therefore, the window frame comes off from the frame.
After that, all you have to do is separate them using a suitable means such as a bar.

Example In this example, a lime-based silicate compound as a main component is used as an expansion pressure generating agent. Specifically, Blystar (registered trademark) manufactured by Onoda Cement Co., Ltd. is used. In addition, appropriate materials such as dolomite type and calcium sulfoaluminate type can be used.

Generally, the window frame 1 is attached to a window opening 2 provided in the frame of a building as follows.
That is, the reinforcing bars 3 are made to protrude from the window opening 2 at about 30 cm intervals, and the window frame 1 is attached to the reinforcing bars 3.
Weld and fix the anchor 4 as a mounting bracket provided on the back side of the , then fill the space between the wall opening and the window frame with mortar 5 so as to surround the attachment point, and then fill the gap between the mortar 5. Also fill mortar 5'. Since the space between the wall opening 2 and the window frame 1 is quite narrow, there are generally some spots 6 between the wall opening 2 and the window frame 1 where the mortar 5, 5' is not completely filled.

A hole 8 is made in the window frame from the surface, and an expansion pressure generating agent 7 mixed with water is filled through the hole. As mentioned above, there is a portion 6 between the window frame and the frame where the mortar 5' is not filled. If the location where the hole is made happens to be a location 6 where there is no mortar, the expansion pressure generating agent will spread inside from there. Further, when a hole is filled with mortar as shown in FIG. 3, only that hole is filled with mortar.
In either case, after filling the expansion pressure generating agent 7 mixed with water, the hole is covered with a lid 9. Leave it as is for half a day or a day. The swelling pressure generating agent 7 must be filled through the holes within 10 minutes after being mixed with water. It is also desirable to use a mortar pump for filling.

As described above, when the expansion pressure generating agent is filled with water and left to stand, the expansion pressure generating agent expands due to the mixed moisture, and the window frame 1 can be removed by the expansion pressure.

In this example, the above-mentioned BLYSTER (registered trademark) is used as the inflation pressure generating agent, but it goes without saying that the present invention is not limited to this.

[Effects of the Invention] As described above, the present invention removes the window frame using the expansion pressure of the expansion pressure generating agent, so there is no need for any large-scale equipment, and anyone can do it without any special skills with just a drill and a crowbar. You can easily remove the window frame.

Further, in the present invention, since the expansion pressure generating agent is simply injected into the window frame through a hole, a large number of windows can be treated at the same time by drilling holes in the window frame in advance with a drill or the like.

Furthermore, the present invention does not generate noise and can be used for any type of window, regardless of the size of the window.

[Brief explanation of the drawing]

FIG. 1 is a schematic front sectional view of a window to be removed according to the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a front sectional view of a window of another embodiment. 1... Window frame, 2... Opening, 3... Rebar, 4...
... Anchor, 5 ... Mortar, 7 ... Expansion pressure generating agent, 9 ... Lid.

Claims (1)

[Claims] 1. A method for removing the window frame of a window in which the window frame is fixed to a metal rod protruding from the window opening of a building frame with a mounting bracket, and mortar is filled between the window frame and the frame. A hole is drilled from the surface to the inside of the mortar, and the hole is filled with an expansion pressure generating agent.The hole formed in the window frame when the hole is drilled is closed with an airtight lid, and the opening is left to allow the expansion pressure generating agent to fill. A window frame removal method characterized by inflating the frame and using the expansion pressure to separate the window frame from the frame.