JPH09158342A - Joint structure of external wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit the generation of cracks in an external wall without damaging beauty of appearance. SOLUTION: A waterproof sheet 2 and a lath 3 are stuck successively onto a foundation 1 as the building frame of a building, and the base 12 of a joint member 11 is fixed onto the foundation 1 by a mortar pie 16. Undercoating mortar 4 is applied so that blade sections 13 inclined towards the foundation 1 and formed in a V-shaped cross section are buried. A reinforcing sheet 15 having low flexibility is stuck along the top section of the joint member 11, and top coating mortar 5 is applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for an outer wall, and more particularly to a joint structure for an outer wall constructed by mortar.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, when constructing an outer wall of a building such as a house, first, a waterproof sheet 2 such as an asphalt-impregnated paper having a waterproof property is provided on a base 1 of the building. And the lath 3 on the surface side of the mortar 4 and then the undercoat mortar 4 and the overcoat mortar 5
I was painting and finishing in order. By the way, the outer wall mortar 4, 5 constructed as described above
When a crack is generated in a part, not only the appearance is impaired, but also the infiltration of rainwater may cause the mortars 4 and 5 to be peeled off or the base 1 to be rotted. However, it is extremely difficult to completely prevent the crack from being generated. Since it was difficult, the groove portions 6 were formed on the surfaces of the mortars 4 and 5 forming the outer wall at a predetermined interval, and the caulking material 7 was inserted into the groove portions 6.
The groove joints 8 filled with are formed in advance so that the cracks C generated on the outer wall are concentrated in the groove joints 8.

[0003]

However, in the above-mentioned joint structure, there is a problem that a great deal of labor is required for the construction work, and the designability is impaired, and further, due to deterioration of the caulking material 7. There was a risk that the waterproofness would also deteriorate. In order to save the trouble of forming the groove portion 6 and caulking the groove portion 6, as shown in FIG. 9, a structure using a joint member 9 having a U-shaped cross section is adopted, but both sides of the joint member 9 are adopted. Side plate 1 protruding upright on the section
There is a risk that cracking C may occur near the boundary between the side plates 10 of the joint member 9 and the mortars 4 and 5 due to insufficient trowel suppression to 0.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a joint structure of an outer wall capable of suppressing the occurrence of cracks without spoiling the aesthetic appearance.

[0005]

In order to achieve the above object, the joint structure of the outer wall according to claim 1 is the joint structure of the outer wall formed by applying mortar to the surface of the skeleton, and the joint structure is provided at the joint. The joint member is arranged along the surface of the body, and the reinforcing sheet is arranged along the joint member in the longitudinal direction. The joint members are separated from each other toward the surface of the body. It is characterized in that it is provided with a blade having a plurality of through holes that are inclined in the direction. The joint structure of the outer wall according to a second aspect is the joint structure of the outer wall according to the first aspect, characterized in that the reinforcing sheet is made of a non-stretchable non-woven fabric having a plurality of holes formed therein. The joint structure of the outer wall according to a third aspect is the joint structure of the outer wall according to the first aspect, characterized in that the reinforcing sheet is made of a low-stretch coarse woven fabric. An outer wall joint structure according to a fourth aspect is the outer wall joint structure according to the first aspect, wherein the reinforcing member is made of a resin formed in a mesh shape.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the joint structure of the outer wall of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 11 is a joint member. The joint member 11 is formed by extruding resin or the like, and is composed of a substrate 12 arranged in the thickness direction of the outer wall 1 and a blade 13 integrally provided on the front end side of the substrate 12. There is. As shown in FIG. 2, the blade 13 of the joint member 11 is formed in a V-shaped cross section by being inclined toward the base 1, and has a plurality of through holes 14. In the joint member 11, the T-shaped end portion of the substrate 12 has the mortar dumpling 16 on the base 1.
And is entirely embedded in the undercoat mortar 4. Further, as shown in FIG. 3, a tape-shaped reinforcing sheet made of, for example, a non-woven fabric having low extensibility, in which a plurality of hexagonal holes 17 are formed on the top of the substrate 12 in which the blades 13 are integrated. 15 is a joint member 11
Is affixed along the longitudinal direction, and the upper coating mortar 5 is applied on the upper surface side thereof.

Next, a procedure for constructing the outer wall having the above structure will be described. (1) First, the joint member 1 is formed on the surface of the base 1 on which the waterproof sheet 2 and the lath 3 are sequentially attached by the mortar dumpling 16.
The substrate 12 of No. 1 is fixed. At this time, the joint member 11 is
Without being caught by the unevenness of the surface of the base 1, the peeling (uneven),
Fix vertically according to plumb bob etc. (2) Next, the undercoat mortar 4 is applied with a trowel using the top of the joint member 11 as a reference. Here, the vertically mounted joint member 11 corrects the unevenness and peeling (unstable) of the surface of the base 1 and makes the surface of the undercoat mortar 4 flat. Further, by handling the trowel, the undercoat mortar 4 enters through the plurality of through holes 14 formed in the blade 13 of the joint member 11 and fills the back surface side of the joint member 11 without a gap.

(3) Next, the reinforcing sheet 15 is attached along the top of the joint member 11. Here, when the undercoat mortar 4 is in an uncured state when the reinforcing sheet 15 is attached, the reinforcing sheet 15 can be easily attached by directly pressing. When the reinforcing sheet 15 is attached after the undercoat mortar 4 is hardened,
Stick with mortar or adhesive. (4) After that, the topcoat mortar 5 is applied and the reinforcing sheet 15 is applied to finish the surface smoothly.

As described above, the outer wall having the joint structure in which the joint member 11 and the reinforcing sheet 15 are arranged can be constructed very easily by the above work. According to the joint portion of the outer wall having such a structure, the blade 13 of the joint member 11 is inclined toward the base 1 and is formed in a V shape, so that the mortar can be reliably held down. At the same time, the mortar bites into the through hole 14, and the joint agent 11 and the mortar are firmly integrated. Further, the reinforcing sheet 15 provided on the top of the joint agent 11 can suppress the shrinkage of the surface layer mortar in the vicinity of both sides of the joint member 11, thereby preventing the generation of the crack C in the joint portion. it can. The contraction stress at the time of drying the mortar is eliminated by the wing portion 13 of the joint member 11 expanding to both sides with the top as a fulcrum as the mortar contracts. This makes it possible to suppress the occurrence of cracks on the surface in combination with the effect of the reinforcing sheet 15.

The reinforcing sheet 15 may be arranged along the surface of the joint member 11, as shown in FIG. Further, in the above example, the joint member 11 having a flat top portion is used, but as shown in FIG. 5, for example, a joint member 11 having a square top portion, or as shown in FIG. It may have a curved top. The reinforcing sheet 15 is not limited to a non-woven fabric as long as it has low stretchability,
A coarse woven cloth, a resin formed in a mesh shape, or a thin iron plate may be used. Further, in the above-described embodiment, the outer wall is constructed on the frame in which the waterproof sheet 2 and the lath 3 are sequentially attached to the surface of the base 1 made of wood or the like, but in the case of the frame made of concrete C, as shown in FIG. The same can be done. When the undercoat mortar 4 is applied with a trowel, it is not always necessary to fill the back surface side of the joint member 11 thoroughly, and it may have a gap as shown in FIG. 7. Further, according to the joint structure having the gap as described above, it is possible to absorb the stress generated in the outer wall in the gap, thereby preventing the generation of further cracks.

[0011]

As described above, according to the joint structure of the outer wall of the present invention, the following effects can be obtained. According to the joint structure of the outer wall according to claim 1, for example, the mortar can be surely pressed by the blades of the joint member, and the reinforcing sheets provided on the top of the joint member prevent the mortar from being close to both sides of the joint member. It is possible to suppress the shrinkage of the mortar and prevent the occurrence of cracks. Further, the shrinkage stress during the drying of the mortar is eliminated by the wing portion of the joint member expanding to both sides with the apex as the fulcrum as the mortar shrinks. This makes it possible to suppress the occurrence of cracks on the surface in combination with the effect of the reinforcing sheet. As a result, it is possible to eliminate the need to form a joint groove that causes the concentration of cracks in a concentrated manner as in the conventional case, and it is possible to improve working efficiency and ensure a good aesthetic appearance.

In the joint structure of the outer wall according to the second aspect, the shrinkage of the mortar in the vicinity of both sides of the joint member can be surely suppressed by the reinforcing sheet made of the low-stretch non-woven fabric. In the joint structure of the outer wall according to the third aspect, the contraction of the mortar in the vicinity of both sides of the joint member can be surely suppressed by the reinforcing sheet made of the low-stretch coarse woven cloth.
In the joint structure of the outer wall according to the fourth aspect, the contraction of the mortar in the vicinity of both sides of the joint member can be surely suppressed by the reinforcing sheet made of resin formed in a mesh shape.

[Brief description of the drawings]

FIG. 1 is a sectional view of a joint portion of an outer wall for explaining an embodiment of a joint structure of an outer wall of the present invention.

FIG. 2A is a front view of a joint member used in an example of an embodiment of a joint structure of an outer wall of the present invention, and FIG.
FIG. 4 is a plan view of a joint member used in an example of the embodiment of the joint structure of the outer wall of the present invention.

FIG. 3 is a perspective view of a reinforcing sheet for explaining the reinforcing sheet used in the embodiment of the joint structure of the outer wall of the present invention.

FIG. 4 is a sectional view of a joint portion of the outer wall for explaining another example of the embodiment of the joint structure of the outer wall of the present invention.

FIG. 5 is a sectional view of a joint portion of an outer wall for explaining another example of the embodiment of the joint structure of the outer wall of the present invention.

FIG. 6 is a cross-sectional view of a joint portion of an outer wall for explaining another example of the embodiment of the joint structure of the outer wall of the present invention.

FIG. 7 is a cross-sectional view of a joint portion of the outer wall for explaining an embodiment of the joint structure of the outer wall of the present invention.

FIG. 8 is a cross-sectional view of a joint portion of an outer wall for explaining a joint structure of a conventional outer wall.

FIG. 9 is a cross-sectional view of a joint portion of the outer wall for explaining the joint structure of the outer wall using the joint member.

[Explanation of Codes] 1 Base (frame) 4 Undercoat mortar (mortar) 5 Topcoat mortar (mortar) 11 Joint member 12 Substrate 13 Vane 14 Through hole 15 Reinforcement sheet 17 Hole C Concrete (frame)

Claims (4)

[Claims] 1. A joint structure of an outer wall obtained by applying mortar to the surface of a skeleton, the joint member being disposed along the surface of the skeleton at a joint, and a longitudinal direction along the joint member. The joint member is provided with a blade having a plurality of through holes that are inclined toward the surface of the body so as to be separated from each other. The joint structure of the outer wall. 2. The joint structure of the outer wall according to claim 1, wherein the reinforcing sheet is made of a low-stretchable non-woven fabric having a plurality of holes formed therein. 3. The joint structure of the outer wall according to claim 1, wherein the reinforcing sheet is made of a woven cloth having coarse mesh and low stretchability. 4. The joint structure of the outer wall according to claim 1, wherein the reinforcing sheet is made of a resin formed in a mesh shape.