JPH0768748B2 - Existing concrete exterior wall renovation structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention prevents freezing and thawing, alkali reaction of aggregates, and salt damage in concrete, tiles, concrete blocks, ceramic siding, etc., buildings having a concrete outer wall, houses, etc. Including a structure in which an existing concrete outer wall is refurbished by using it as a base without destroying the existing outer wall that is cracked by the secular change or is heavily contaminated by mold, etc. Is.

[Conventional technology]

The outer wall of this type of concrete building is cracked in 5 to 10 years, and in order to stop the progress and renew the appearance, for example, JP-A-58-164857 and SAI 59
No. -117752 is known. That is, in the former, an asbestos seat plate is interposed between the existing outer wall and the L-shaped new exterior material mounting bracket in the curtain oar so that the unevenness of the existing outer wall does not adversely affect the mounting of the mounting bracket. The latter is a method of remodeling an outer wall of a building in which a cutout recess is provided in an existing outer wall, and a steel liner is interposed in this recess to fix a new outer wall material mounting member.

[Problems to be Solved by the Invention] However, the former new exterior material mounting brackets are not stable because they are arranged at regular intervals only from one side of the C-shaped steel, and the C-shaped steel has joints for mounting the new outer wall material. There was a drawback that the metal wall was fixed and the outer wall was not provided with any heat insulating property. In the latter case, it is very difficult to form a cutout recess in the existing wall, which is unrealistic.

[Means for solving problems]

In order to eliminate such drawbacks, the present invention improves the strength by using the furring strip as a square pipe cross section, and staggers the mounting legs so that it can be easily and stably mounted on an existing wall at a small number of points. Refurbishing the existing concrete outer wall with a new outer wall that is beautiful and has no cracks by attaching a metal siding material on this furring strip by fixing it to the existing outer wall with a fixture on the existing outer wall It proposes a structure.

〔Example〕

An embodiment of the existing concrete outer wall repair structure according to the present invention will be described in detail below with reference to the drawings. First
FIG. 1 is a perspective view showing a case where the existing concrete outer wall renovation structure according to the present invention is applied to a building, where 1 is an existing building, 2 is an existing parapet, 3 is an existing outer wall, 4 is a headstock fixture, and 5 is a headstock. , 6 is a furring strip, 7 is a mounting leg, 8 is a mounting hole, 9 is an anchor bolt, 10 is a nut, 11 to 15 are accessories,
16 is a metal siding material, and 17 is a fixture such as a nail. To further explain, the existing building 1 is made of concrete, ALC, blocks, tiles, squares made of ceramic siding material, gables, flat roofs, and the like. The existing parapet 2 is provided as needed, and although it is almost present in buildings, it is often not formed in general houses. In addition, the existing outer wall 3 is mainly a concrete-based outer wall such as a concrete skeleton coated with cement mortar, a concrete non-exposed outer wall, an ALC board-covered outer wall, etc. It is intended for outer walls contaminated by partial destruction, moss, mold, etc. As for the Kasaki attachment 4, the shape of the Kasaki 5 to be attached by springback and screws, existing parapet 2
Although it depends on the cross section of the top portion, it is formed as shown in FIG. 2 or 3, for example, and is fixed to the furring strip 6 by adhesion with an adhesive or by welding. The furring strip 6 is formed in a square pipe-shaped cross section as shown in FIG.
As shown in FIG. 5, the mounting legs 7 are arranged in a zigzag pattern on the opposite side surfaces in a zigzag manner so that stability can be easily obtained, and between the back surface 6a of the furring strip 6 and the contact surface 7a of the mounting leg 7 having an L-shaped cross section. A structure in which a gap of ΔG is formed, construction of the furring strip 6 can be easily performed, stability with the existing outer wall 3 as a base can be obtained, and vibration from the existing outer wall 3 is reduced. Is. The furring strip 6 is horizontal as shown in FIGS. 1 and 6.
It is arranged vertically in the shape of a rod, and the necessary parts are integrated by either adhesive or welding, and are fixed integrally with the existing outer wall 3 by anchor bolts 9. Of course, when the metal siding material 16 is vertically stretched, it is necessary to use a horizontal furring strip. The attachment hole 8 is for attaching the attachment leg 7 to the anchor bolt 9, and is formed in an oval shape, an elliptical shape, or the like so as to be able to cope with the displacement of the attachment position. Further, as shown in FIG. 7, the accessory 11 is a toe cover, the accessory 12 is a mat plate-like fixture of the toe cover 11, and the accessories 13, 13a are window frame covers as shown in FIG. As shown in FIG. 9, the accessory 14 is a projected corner cover, and the accessory 15 is a projected corner cover attachment. Further, as the metal siding material 16, a member having a shape as shown in FIGS. 10 (a) to 10 (g) is used, and is mounted as shown in FIGS. 1 and 11. In particular, the metal siding material 16 is one in which a synthetic resin foam 16c is integrally interposed between a metal thin plate molded body 16a and a back surface material 16b which are easy to apply and have excellent heat insulating properties.

Next, the construction method will be described.

First, a scaffold is assembled along the existing outer wall 3 of the existing building 1 as shown in FIG. Next, the furring strip 6 as shown in FIG.
Is formed to a predetermined length, and the anchor bolt 9 is driven at a position corresponding to the mounting hole 8 of the mounting leg 7. The furring strip 6 is fixed to the anchor bolt 9 as shown in FIG. As shown in FIG. 2, a head board fitting 4 is welded to a horizontal head edge 6'of the furring strip 6 on which the existing parapet 2 has been installed, and then a head board 5 is attached. Also, the accessories 13, 13a shown in FIG. 8 are attached around the window, and then the metal siding material 16 shown in FIG. 10 (c) is transferred from the base to the existing parapet 2 via a starter (not shown). The fixture 17 is installed on the furring strip 6 toward the front. It is to be noted that, as shown in FIG. 7, a pavement plate-shaped fitting 12 is installed near the headstock fitting 4 of the existing parapet 2. Next, after the metal siding material 16 is installed, the accessory 11,
14, 15, joints etc. are covered with a joiner not shown,
Thereafter, although not shown, the caulking material is filled in the necessary places to complete the construction.

〔The invention's effect〕

As described above, according to the repair structure for the existing concrete outer wall of the present invention, the outer wall can be repaired in a short period of time without stopping living of the existing building. By adding heat insulation and dehumidification by ventilation to the outer wall, it is possible to improve habitability and extend the life of the building. The new outer wall is easy to construct, and it is possible to form a beautiful and durable outer wall at low cost. Metal siding material does not require maintenance after construction, and maintenance costs are low. Since the mounting legs are arranged in a zigzag pattern on the furring strip, the number of fixtures to the existing wall is minimal and stable, and external forces (earthquakes, etc.)
However, there is a feature that the new outer wall does not break or separate.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a repair structure for an existing concrete-based outer wall according to the present invention, FIG. 2 is an explanatory view showing the top of an existing parapet, FIG. 3 is a headstock fixture, and FIG. 4 is a furring strip. FIG. 5 is an explanatory view showing a mounting state of the furring strip and the existing outer wall, and FIG. 6 is a base for applying a metal siding material to the existing outer wall as shown in FIG. 7 is an explanatory view showing the construction state of the furring strip, FIG. 7 is an explanatory view showing the accommodation of the metal siding material and the top of the existing parapet, and FIG.
FIG. 9 is an explanatory view showing a mounting state of the accessory, FIGS. 10 (a) to (g) are explanatory views showing an example of a metal siding material, and FIG. 11 is an explanation showing a working state of the metal siding material. It is a figure. 1 …… Existing building, 3 …… Existing outer wall, 6 …… Furnace, 7 ……
Mounting legs, 9 …… Anchor bolts, 16 …… Metal siding material.

Claims (1)

[Claims] 1. An outer wall of an existing concrete-based outer wall having a square pipe-shaped cross section, and L-shaped mounting legs fixed in a zigzag manner on opposite sides thereof are arranged at regular intervals, and the mounting legs are also provided. Is fixed to the above-mentioned existing concrete outer wall with a fixture such as an anchor bolt, and a metal siding material is mounted on the fixed furring strip to form the existing concrete outer wall renovation structure.