JPS61257588A - Method of replacing window frame - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a window frame attached to an opening in a concrete frame such as a wall in a concrete building. The present invention relates to a method for replacing a window frame in which an anchor member is joined to a reinforcing bar extending from the concrete body to the opening, and a mortar layer is formed between the concrete body and the outer peripheral portion.

(Prior Art) In a window frame attached to the concrete frame of an existing concrete building, the outer peripheral part of the window frame is connected to the reinforcing bars of the concrete frame via a plurality of anchors, and the anchor members and the reinforcing bars are connected to each other. The joint is covered with a layer of mortar formed between the window frame and the concrete frame.

In order to replace a window frame installed in such a state with a new window frame, conventionally, the window frame is replaced by pulling the pair of horizontal frames and the pair of vertical frames of the window frame toward each other using jacks, etc., and deforming the window frame. A method is used in which the anchor members and reinforcing bars of the frame are separated, the window frame is then removed from the opening, and a new window frame is fitted into the area where the frame was removed.

However, the conventional method has disadvantages in that the apparatus including the jack and the like is large in size, takes time and effort to operate, and requires a skilled person.

(Object of the Invention) An object of the present invention is to provide an easy-to-operate window frame replacement method that eliminates the conventional drawbacks.

(Structure of the Invention) The present invention provides a window frame attached to an opening in a concrete frame, in which an anchor member provided on the outer periphery of the window frame is joined to a reinforcing bar extending from the concrete frame to the opening. A method for replacing a window frame in which a mortar layer is formed between the concrete body and the outer peripheral portion, the method comprising replacing the window frame around the indoor side or the outdoor side of the window frame in order to expose the anchor member and reinforcing steel. removing a part of the mortar layer; cutting the anchor member or the reinforcing steel; removing the window frame from the concrete frame toward the indoor side or outdoors; The present invention is characterized in that a new window frame having an anchor member provided thereon is fitted, and then the anchor member of the new window frame and the reinforcing bar are joined.

(Operations and Effects of the Invention) According to the present invention, since the mortar layer around the window frame is removed, the anchor member is cut, the window frame is removed, a new window frame is fitted into the area where the window frame was removed, and the The anchor member of the window frame and the reinforcing bar can be easily joined after fitting.

(Embodiments) The features of the present invention will become clearer from the following description of the illustrated embodiments.

Referring to Figures 1a and 1b, a window frame 10 to be replaced in accordance with the present invention is provided in an opening 12a in a concrete frame 12, such as a concrete wall of a building.

The illustrated window frame 10 consists of a pair of upper and lower horizontal frames 10a and a pair of left and right vertical frames lOb, and an anchor member 14 made of a plurality of pieces is attached to the outer periphery thereof. The anchor members 14 are arranged at intervals in the longitudinal direction of the horizontal frame 10a and the vertical frame 10b. In the illustrated example, the anchor member 14 fixed to the upper horizontal frame 10a is a flat iron piece. The anchor member 14 fixed to the lower horizontal frame 10b and the anchor member 14 fixed to the pair of vertical frames are respectively composed of an iron piece having a 5-shaped cross section and an iron piece having a substantially T-shaped cross section. ing.

The window frame 10 extends from the concrete frame 12 to its opening 12.
It is fixed within the opening 12a by welding a plurality of reinforcing bars 16 extending inside the opening 12a and the corresponding sheath anchor members 14. Between the concrete frame 12 and the outer periphery of the window frame 10, a part of the concrete frame 12 around the opening 12a, a part of the horizontal frame 10a, and a part of the vertical frame tob are covered with a mortar layer 18. .

In order to replace this window frame IO, first, as in the illustrated example, from the indoor side of the building or from the outdoor side, the mortar layer 18 around the outer periphery of the window frame 10 is (Figures 2a and 2b).

In the illustrated example, a portion of the mortar layer 18 has been removed along a line parallel to each horizontal frame and each vertical frame to expose the anchor member 14 and reinforcing bar 16. Removal of a portion of the mortar layer can be performed, for example, by making a cut in the mortar layer 18 using a rotary cutter such as a rotary saw, and destroying and removing the portion surrounded by the cut. After removing a portion of the layer, a rectangular opening 20 is formed surrounded by the remaining mortar layer 18.

Next, as shown in FIGS. 3a and 3b, the exposed anchor member 14 is cut by fusing or using the rotary cutter, etc. In the example shown in FIG. has been done. Note that instead of cutting the anchor member 14, the reinforcing bar 16 can be cut.

In this way, after the window frame 10 is released from being fixed at the opening 12a, the window frame 10 is pulled out indoors and the opening 1
Removed from 2a. The window frame IO is shown in Figures 3a and 3b.
As shown by the arrow in the figure, the attachment can be moved in parallel toward the indoor side while maintaining its original position, and removed through the opening 20.

A new window frame 26 with a plurality of anchor members 24 provided on the outer periphery so as to correspond to the reinforcing bars 16 is fitted into the removal site 22 of the window frame 10. The illustrated window frame 26 is an extruded aluminum shape. A horizontal frame 14a and a vertical frame 24b formed by
The anchor part and the reinforcing bar 16 are positioned so that they partially overlap each other, and then the anchor part and the reinforcing bar are joined by welding (see FIGS. 4a and 4b).

Thereafter, in order to restore the external shape to the original state in which the old window frame lO was provided, mortar N was used to form the opening 20.
The mortar 32 is filled in the places 28 and 29 where a part of the mortar layer 18 was removed when the old window frame 10 was removed, and a layer thereof is formed. In this way, window frame 1
0 replacement, modification, and installation are completed. It is also possible to remove old window frames, fit new window frames, and perform other work from outside.

[Brief explanation of the drawing]

Figures 1a and 1b are longitudinal cross-sectional views and cross-sectional views of the concrete frame with the old window frame installed, and Figures 2a and 2b are longitudinal cross-sectional views of the concrete frame with some of the mortar removed. Figures 3a and 3b are longitudinal and cross-sectional views of the concrete frame when the old window frame was removed, and Figures 4a and 4b are the concrete structure with the new window frame installed. FIG. 2 is a vertical cross-sectional view and a cross-sectional view of the frame. 10: window frame, 12: concrete frame, 14: anchor member, 16: reinforcing bar, 18: mortar layer, 22: window frame removal trace, 26, 24: new window frame and anchor member,
32: Mortar. Agent Patent Attorney Nobuyuki Matsunaga Figure 10 + 2 12a
14 140 14Figure 20

Claims (1)

[Claims] A window frame provided in an opening of a concrete frame, in which an anchor member attached to the outer periphery of the window frame is connected to a reinforcing bar extending from the concrete frame to the opening, and a link between the concrete frame and the outer periphery. A method for replacing a window frame with a mortar layer formed therebetween, the method comprising: removing a part of the mortar layer around the indoor side or the outer side of the window frame to expose the anchor member and reinforcing steel; , cutting the anchor member or the reinforcing bar;
removing the window frame from the concrete frame to the indoor side or outdoor side; fitting a new window frame with an anchor member provided on the outer periphery in the area where the window frame was removed;
A method for replacing a window frame, the method comprising: thereafter joining an anchor member of the new window frame to the reinforcing steel.