JPH11343718A - Joint structure of wall covering stud - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a wall framing to cover studs preventing dents from arising with elapse of time by bonding a semicylindrical foamed-joint material having the same joint width and a little lower than a joint depth on a recessed joint and filling elastic putty in a space defined by a foamed joint material protrusion and recessed joint side faces and further laminating a decorative coating filmon a building material surface. SOLUTION: A semicylindrical foamed-polystyrene molding D (foamed joint material) provided with the same width with a recessed joint and a little lower height than the recessed joint depth and applied with an adhesive material C in advance at the bottom race, is charged and bonded on a recessed joint formed by butting end protrusions B of the calcium silicate boards (building material) A notched to form an L-shape at the end, against each other. Elastic putty E is applied in a filling fashion in the space defined by the protrusion of the filled foamed-polystyrene molding D and the side faces of the recessed joint to make smooth the building material A as a whole up to the surface of the peripheral building material of the recessed joint. After curing, a decorative coating film is laminated with a decorative paint F on the surface of the building material A to form a seamless integral wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large wall joint structure for forming an integrated large wall with no visible seam at abutting portions of building materials on a wall surface of a building.

[0002]

2. Description of the Related Art Conventionally, various treatment methods for abutting portions of building materials on a wall surface of a building have been proposed. For example,
In Japanese Utility Model Application Laid-Open No. 4-20539, a concave joint portion formed at a butt portion of a plate-shaped wall member is subjected to a primer treatment, and subsequently, a one-component reaction-curable and elastic putty is filled, and the joint is filled. And apply a flat fiber structure on top of it, apply an elastic putty on top of it, process the joints smoothly, apply a decorative paint on top of it, and apply a decorative paint on the joints. It forms a large wall structure.
In Japanese Patent Application Laid-Open No. 3-273804, a modified silicone-based putty material is filled in a joint at a joint of a dry panel through a backup material, and a modified silicone-based putty material is applied to the periphery of the joint of a dry panel. Then, a decorative paint is applied to form an integral large wall structure with no visible joints. In particular, the use of the modified silicone-based putty material is characterized in that a large wall joint structure can be formed without requiring a primer treatment or a planar fiber structure.

[0003]

However, the volume of the elastic putty material used in the large wall joint structure is reduced due to the volatilization or curing shrinkage of the contained component with time (hereinafter referred to as "file"). It is common to do.
When the elastic putty material frays at the concave joint portion, the elastic putty material is adhered to the side surface portion of the concave joint portion, so that a dent occurs at the concave open portion which is a movable portion. Further, since the elastic putty material is pulled from the side by the contraction of the building material, the dent is further increased. When this dent occurs,
Elastic putty materials and decorative coatings laminated on the surface via a planar fiber structure will dent together.
Even if an integrated large wall is formed, joint grooves are dented in the external appearance, which impairs aesthetic appearance.

Accordingly, an object of the present invention is to provide a large wall joint structure for forming a large wall which does not cause such dents even with time.

[0005]

In order to solve such a problem, the present inventor has solved the above-mentioned problem by using a specific foamed joint material and minimizing the use of an elastic putty material that generates a fuzz. The present invention has been completed in view of obtaining a large wall joint structure which does not occur. That is, to the concave joint portion of the butt portion of the building material, the width is equal to the joint width, the height is slightly lower than the joint depth, a kamaboko-shaped foam joint material is adhered so that the bottom thereof is in contact with the concave joint bottom, A large wall joint structure in which an elastic putty material is filled in a space formed by the convex joint portion and the concave joint side surface portion, and a decorative coating layer is further laminated on the surface of the building material to form a seamless integral wall. .

In such a large wall joint structure, since the amount of the elastic putty material used is only the space formed by the foamed joint material convex portion and the concave joint surface portion, the components in the elastic putty material are volatilized. In addition, the influence of filing due to curing shrinkage becomes very small. Even if the building material is pulled from the side due to shrinkage, it is the elastic putty that directly receives the tensile force, and the tensile force transmitted to the kamaboko-shaped foam joint material is dispersed and relaxed. In addition, since the shape of the foamed joint is convex on a curved surface, the force is dispersed even if the elastic putty is pulled, so that the shape of the foamed joint is not significantly broken. Absent. With such a mechanism, in the large wall joint structure of the present invention, it is possible to form an integral large wall that does not cause dents over time.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The foam joint material used in the present invention can be made of a material having a certain elasticity, such as a polystyrene foam or a polyurethane foam. In consideration of adhesion, durability as a joint filler, and waterproofness, a polystyrene foam is preferable. In consideration of the waterproofness and the strength of the joint structure, the expansion ratio is 3 to 10 times, and preferably 5 to 10 times.
7 times. Further, the degree of bending of the convex portion of the kamaboko shape is not particularly limited depending on the size of the concave joint portion, but the effect of the present invention is greatest when the cross section is semicircular. For the size of the foamed joint material, a material having a width equal to that of the joint and a height slightly lower than the joint depth is used in accordance with the size of the joint to be used. At this time, the height slightly varies depending on the characteristics of the elastic putty to be used, but it is necessary to use a height that is at most 1 to 2 mm lower than the joint depth as a guide.

The method of bonding the foamed joint material to the concave joint bottom may be such that an adhesive is applied to the concave joint bottom in advance, or an adhesive may be applied to the bottom of the foam joint. Further, an adhesive layer may be provided in advance on the bottom of the foam joint material. In this case, there is no need to apply an adhesive, which is preferable in terms of work efficiency.

The elastic putty material comes into close contact with the concave joint side surface,
There is no particular limitation as long as it is in close contact with the foamed joint material. For example, a plasticizer-free modified silicone system containing a polyoxyalkylene polyether main chain polymer containing a hydrolyzable silyl group at a molecular terminal as a component is used. Examples include an elastic putty material, a moisture-curable urethane prepolymer, and an acrylic urethane polymer.

[0010] The decorative coating layer laminated on the surface of the foamed joint material and the elastic putty material is not particularly limited as long as it is used as a paint for building finish. Considering that the width fluctuates, a material having a certain degree of elasticity is desirable. Examples of such paints include a waterproof type multi-layer coating material E and a thick finish coating material stipulated in JISA 6909 “Architectural Finish Coating Material”, and a stone-like finish coating material as a decorative coating material. Can be Also,
As the coating method, any coating method such as spraying, roller coating, brush coating, trowel coating and the like may be used.

[0011]

(Example 1) As shown in FIG. 1, a width of 8 mm and a depth of 4 mm are formed by abutting a terminal convex portion B of a calcium silicate plate A whose terminal is cut out in an L-shape.
The adhesive material C was previously applied to the bottom surface of the concave joint portion of
Filling and bonding a semi-cylindrical foamed polystyrene molded product D (expansion ratio 5 times) having the same width as the concave joints and a height 1 mm lower than the concave joints, and then the side surfaces of the convex and concave joints of the filled polystyrene molded product Then, “SK elastic putty” (modified silicone-based putty material) manufactured by SK Chemicals Co., Ltd. was filled and applied with a spatula as an elastic putty material E in the space formed between the two to make it smooth. At this time, the putty material was applied to the surface of the calcium silicate plate around the concave joint so as to be smooth as a whole. This was cured for 3 days under standard conditions, and as a cosmetic paint F, “Soft Stucco” manufactured by SK Chemicals Co., Ltd. was applied based on the standard specifications,
Painted and spray painted. This was used as a test body after 14 days of curing.

(Example 2) As shown in FIG. 2, a concave shape is used except that a calcium silicate plate G whose end is cut into a joint shape is used and a fixed sealing material H is used in the joint portion. A joint was prepared in exactly the same manner as in Example 1 to produce a test body.

(Comparative Example 1) As shown in FIG. 3, a back-up material made of expanded polyethylene was put into a concave joint part to half the joint depth, and then “SK elastic cork” (one-liquid moisture hardening) manufactured by SK Chemicals Co., Ltd. Urethane resin-based putty material) was applied by filling with a spatula. At this time, the putty material was applied to the surface of the calcium silicate plate around the concave joint so as to be smooth as a whole. This was cured in a standard state for 3 days, and thereafter, a cosmetic paint was applied in the same manner as in Example 1.

* Dent test of joint part * The prepared specimen was left for 3 months, and after drying, the surface decorative coating film was visually observed. If no dent was observed, ○ indicates that a slight dent was observed. Was evaluated as Δ, and those with very noticeable dents were evaluated as ×, and the results are shown in Table 1.

As is apparent from the results shown in Table 1, no dents were observed on the surface when a foam joint material having a kamaboko cross-sectional shape was used. In the method of applying the putty material, it was found that dents became noticeable with the movement of the calcium silicate plate.

[Table 1]

[0016]

According to the present invention, in a large wall joint structure using an elastic putty material which is usually filled and used for waterproofing and cushioning of joints, volatile components contained in the elastic putty material and the elastic putty material are used. Even if fraying occurs due to its own curing shrinkage, the amount of elastic putty material can be greatly reduced, so there is almost no dent of the decorative coating on the surface due to the influence of fraying,
The influence of the tensile force of the elastic putty material due to the expansion and contraction of the building material forming the joint is also reduced by the kamaboko-shaped foamed joint material filled in the concave joint portion, so that there is no dent as a whole over time. There is an effect that a beautiful large wall can be formed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a joint structure according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a joint structure according to a second embodiment of the present invention;

FIG. 3 is a cross-sectional view showing a joint structure using a conventional backup material and a modified silicone-type putty material.

[Explanation of symbols]

 A Calcium silicate plate B End protrusion C Adhesive material D Kamaboko-shaped expanded polystyrene molded product E Elastic putty material filling space F Cosmetic paint G Fitting-shaped calcium silicate plate H Backup material

Claims (2)

[Claims] A concave joint portion of a butt portion of a building material is provided with a semicircular foam joint material having a width equal to the joint width and a height slightly lower than the joint depth such that a bottom portion thereof is in contact with the concave joint bottom portion. A space formed by the foamed joint material convex portion and the concave joint side surface portion is filled with an elastic putty material, and a decorative coating layer is further laminated on the surface of the building material to form a seamless integral wall. Large wall joint structure. 2. The large wall joint structure according to claim 1, wherein the expanded joint material is a molded article of expanded polystyrene having an expansion ratio of 3 to 10 times.