JP2934208B2 - Replacement method of metal window lattice - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of replacing a metal window grid by removing an existing window grid and attaching a new window grid.

[0002]

2. Description of the Related Art In a building made of reinforced concrete or steel frame, a window grid is provided outside a window mainly for the purpose of preventing danger and blindfolding. As shown in FIGS. 1 and 2, an anchor bolt 3 is generally embedded in a concrete wall 1, and the left and right vertical frames 5 of the lattice P are inserted into the anchor bolt 3 and positioned with a nut 7. And have been welded.

[0003] In order to replace a new window grid, conventionally, the existing window grid was removed and the anchor bolts 3 were also cut from the root. That is, the anchor bolt 3 was also cut off inside the mortar finish and removed, and after removal, refinished with mortar, and all new aluminum handrails were fixed with new anchors.

[0004]

However, the removal of the anchor bolts 3 requires not only a difficult task of peeling concrete, but also applying mortar or painting for repair. It is necessary to work at a high place, so that it is necessary to build a scaffold, and there is a problem that workability is poor, construction period is delayed, and work becomes expensive.

The present invention has been made in view of the above-described circumstances,
The use of existing anchor bolts eliminates the need to work on concrete, and the existing anchor bolts do not appear in appearance. The purpose was to.

[0006]

In order to achieve the above-mentioned object, the present invention removes an existing steel window grate supported by anchor bolts protruding from a concrete wall. Leave by cutting at the tip, form a screw on the remaining anchor bolt,
An object of the present invention is to provide a method for replacing a metal window lattice, wherein a support arm of the new window lattice is screwed to an anchor bolt and a cap nut is used for screwing.

The new window lattice is made of aluminum which can be assembled from an extruded member. The support arm is formed in an L-shape with aluminum, and the tip of the support arm is screwed to the outer surface of the vertical frame of the new window lattice with a bolt. If the vertical frame serves as a support for preventing the cap nut from coming off by screwing the cap nut on the back side of the vertical frame, it is more effective to achieve the object.

[0008]

[Operation] Since the replacement method of the metal window lattice is configured as described above, in order to use the existing anchor bolts,
Since the new window lattice can be firmly supported and the part to be modified in the work is near the window, it is not necessary to form a scaffold, and the work can be performed easily and quickly.

[0009] Even if the anchor bolt is rusted,
As a result of the tapping operation, the corroded portion is shaved off, and the corroded portion does not directly come into contact with the outside air due to the cap nut, thereby preventing the rust from progressing. Especially when the new window grid is made of lightweight aluminum,
The work is particularly easy, and the appearance is particularly good.
In addition, the cap nut is prevented from coming off by the vertical frame, which is safe.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings.

The drawings show an embodiment, and the method of replacing the window lattice is such that an existing window lattice P is made of steel (FIGS. 1 and 2), and is removed to form a new aluminum lattice. Although it is replaced with a window grid R and uses a part,
No existing objects are shown (Fig. 4, Fig. 5, Fig. 6).

As for the mounting structure of the existing window lattice P, a pair of upper and lower anchor bolts 3, 3 are respectively protruded from the concrete walls 1 on the left and right sides of the sash window W, and the vertical frames 5, 5 are welded thereto. Therefore, by cutting the anchor bolts 3 and 3 at the distal ends (the positions indicated by the dashed lines in FIG. 2) in a state where the existing window lattice P is suspended by a rope or supported by a table so as not to fall down,
Remove the existing window lattice P.

When the existing window lattice P is removed in this way, since the anchor bolts 3 remain on the concrete wall 1, screws 10 are formed in the anchor bolts 3 as shown in FIG. The cutting of the anchor bolt 3 and the tapping operation can be easily performed by placing the body on the window W.

The new window grid R is made of extruded aluminum and is framed by left and right vertical frames 9, 9, an upper frame 11 and a lower frame 13, and between the upper frame 11 and the lower frame 13. A large number of pairs 15, 15,... Are arranged. Then, a pair of upper and lower support arms 17, 17 are attached to the left and right vertical frames 9, 9, respectively.

The left and right vertical frames 9, 9 are composed of an upper frame 11 and a lower frame 1.
3 and is fixed to both sides by a pair of studs 19 on both sides.

The upper frame 11 and the lower frame 13 are made of the same channel-shaped material having an open lower surface.
1, 21 are formed. Further, inwardly projecting pieces 23, 23 are formed opposite to each other at the lower ends of the inner surfaces on both sides. Upper frame 1
In 1, an attachment 25 directly connecting the set 15 is hooked on the inward projecting pieces 23, 23.

The attachment 25 is provided with both inward projecting pieces 2 of the upper frame 11.
Non-return pawls 27, 27 which are attached to the tops of the inwardly projecting pieces 23, 23 on the upper surface.
Is protruding. The bracket 15 is a rectangular hollow member having a pair of screw pockets 27, 27 formed on the inner surface. The upper end is screwed to the attachment 25, but the lower end is screwed directly to the lower frame 13. Is done.

The support arm 17 is an L-shaped bent metal obtained by cutting an extruded aluminum material, and has a through hole 29 for the anchor bolt 3 at the base end and a through hole 32 for the mounting bolt 31 at the tip. Can be Then, the washer 33 is inserted into the anchor bolt 3 in a state where the base end thereof is in contact with the concrete wall 1, and is tightened with the hexagonal cap nut 35. The vertical frame 9 is fastened by a nut 37 inside the vertical frame 9.

The cap nut 35 is located on the back side of the vertical frame 9,
There is a slight gap L between the vertical frame 9. for that reason,
In the state where the new window lattice R is installed, even if the cap nut 35 is loosened and the screwing is retracted, it does not come off because it is supported by the vertical frame 9. Therefore, when installing the new window lattice R, it is easier to attach the support arm 17 to the anchor bolt 3 in advance and then attach the window lattice R thereto. However, conversely, that is, it is possible to screw the cap nut 35 into the anchor bolt 3 even if the support arm 17 is attached to the window lattice R in advance.

[0020]

As described above, according to the present invention, when removing an existing window lattice, it is not necessary to perform a difficult work of peeling a concrete wall in order to leave anchor bolts. In addition to eliminating the need to repair the damage with mortar or paint, there is no need to install a new foundation for installing a new window lattice, which greatly improves workability and significantly shortens the construction period. Since there is no need to build a scaffold, construction costs are low, and since the anchor bolts used at the beginning of construction are used, they can be installed firmly, and they do not appear in appearance. It has excellent effects such as the appearance of a new article.

When the new window lattice is made of aluminum (claim 2), it is lightweight and easy to install, and the cap nut is prevented from coming off, which is safe.

[Brief description of the drawings]

FIG. 1 is a front view of an existing window lattice.

FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1;

FIG. 3 is a plan view showing a state in which screws are formed in anchor bolts remaining after the existing window lattice is removed.

FIG. 4 is a front view showing an installation state of a new window lattice.

FIG. 5 is an enlarged sectional view taken along line BB of FIG. 4;

FIG. 6 is an enlarged sectional view taken along line CC of FIG. 4;

[Explanation of symbols]

 P Existing window grid R New window grid W Window 1 Concrete wall 3 Anchor bolt 9 Vertical frame 10 Screw 17 Support arm 35 Cap nut

Claims (2)

(57) [Claims] 1. An existing steel window lattice supported by anchor bolts protruding from a concrete wall is removed, and at that time, the anchor bolts are cut off at the tip to be left, and screws are formed in the remaining anchor bolts. A method of replacing a metal window lattice, comprising mounting a new window lattice by screwing its support arm to an anchor bolt and using a cap nut for screwing. 2. A new window lattice is made of aluminum which can be assembled with an extruded profile, and a support arm is formed in an L-shape from aluminum, and a tip end of the support arm is bolted to an outer surface of a vertical frame of the new window lattice. The method of replacing a metal window lattice according to claim 1, wherein the vertical frame serves as an obstacle for screwing and retreating of the cap nut by screwing and screwing the cap nut behind the vertical frame.