JPH08232431A - External wall board and execution method for external board - Google Patents

Abstract

PURPOSE: To prevent a sealing material from being easily separated by forming a housing recessed part of a bond breaker in the vicinity of the corner part where the bottom wall of a joint groove and the inside wall intersect, so that the joining area of the sealing material to the inside wall can be secured. CONSTITUTION: A joint groove 4 consisting of a bottom wall 2 facing to the front side and an inside wall 3 facing to the end surface side is formed along the side peripheral part of one side board of the external wall boards 1, 1. A plurality of external wall boards 1 are butted to each other, and a bond breaker 7 is coated on the bottom wall 2 of the joint groove 4 at the butted part, and a sealing material 8 is filled inside the joint groove 4. In this construction method, a housing recessed part 5 for housing the bond breaker 7 is formed in the vicinity of the corner part where the bottom wall 2 of the joint groove 4 and the inside wall 3 intersect, and the side peripheral part of the bond breaker 7 is pushed into the recessed part 5. As a result, the coating of the bond breaker 7 to the inside wall 3 of the joint groove 4 can be prevented, so that the joining area of the sealing material 8 to the inside wall 3 can be secured, and even in a thin external wall board 1, the sealing material 8 can be prevented from being easily separated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer wall board fixed to a house or a building.

[0002]

2. Description of the Related Art Conventionally, ceramic or resin outer wall boards have been used as highly durable outer wall materials.

A plurality of the outer wall boards are sequentially abutted against each other and fixed to a wall foundation of a house or building to form an outer wall of a house or the like.

A joint groove is formed in the abutting portion of the outer wall board, and the joint groove of the outer wall board is sealed by filling the joint groove with an elastic sealing material.

The joint groove is provided along at a side edge of at least one of the outer wall boards that are abutted against each other, and is formed by a bottom wall facing the front surface side and an inner wall surface facing the end surface of the outer wall board.

When the joint groove is filled with the sealant, if the sealant is adhered to the bottom wall of the joint groove and the three surfaces of the inner walls facing each other, the left and right extension margins of the sealant cannot be taken so much and the outer wall is not formed. When the board expands and contracts due to temperature changes, stress concentrates on the sealing material that adheres to the bottom wall of the joint groove, causing the sealant to break. A tape-like or liquid bond breaker for preventing the above is applied to prevent the sealing material from adhering to the bottom wall of the joint groove.

In this way, the sealing material becomes a two-sided adhesive that adheres only to both inner sidewalls of the joint groove facing each other.
Even if the expansion margin of the sealing material is large and the outer wall board expands and contracts, the sealing material is elastically expanded as a whole to disperse the stress, and thus the sealing material is less likely to break.

By the way, when a tape-like or liquid bond breaker is coated on the bottom wall of the joint groove to perform the two-sided bonding of the sealing material, the coating of the bond breaker shifts to the left and right, and the bond breaker becomes the inner wall of the joint groove. There is a problem that it rises along with, and reduces the adhesion area between the inner wall and the sealing material, especially when the outer wall board is thin.
Since the joint groove also becomes shallower, it becomes more serious.

Therefore, according to the present invention, the bond breaker for covering the bottom wall of the joint groove is prevented from covering the inner side wall of the joint groove, and the bonding area between the sealing material and the inner side wall of the joint groove is sufficiently secured. , It is intended to make it difficult for the sealing material to be peeled off from the outer wall board.

[0010]

In order to solve the above-mentioned problems, the present invention provides at least one side edge portion,
A bottom wall facing the front side, and an outer wall board having a joint groove formed of an inner side wall facing the end face side, in the vicinity of a corner portion where the inner side wall and the bottom wall intersect, a bond breaker accommodating recess is formed, The outer wall board was constructed.

[0011]

In the outer wall board according to the present invention, when the bottom wall of the joint groove is covered with the tape-shaped or liquid bond breaker, even if the bond breaker shifts from side to side, the side edge of the bond breaker is By pressing into the recess formed in the vicinity of the corner portion, the bond breaker is prevented from covering the inner side wall of the joint groove.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An outer wall board according to the present invention will be described with reference to the accompanying drawings.

The outer wall board 1 shown in FIG. 1 is provided with a joint groove 4 along one side edge portion, which is composed of a bottom wall 2 facing the front surface side and an inner side wall 3 facing the end face side.

The joint groove 4 is provided from the upper edge to the lower edge of the outer wall board 1, and a recess 5 is formed in a portion of the inner wall 3 which intersects with the bottom wall 2.

A plurality of outer wall boards 1 are sequentially fixed to a wall foundation such as a house or a building while abutting the end faces having the joint grooves 4 and the end faces not having the joint grooves 4.

Thereafter, a tape-like bond breaker 7 is attached to the bottom wall 2 of the joint groove 4 at the abutting portion of the outer wall board 1, and the joint groove 4 is filled with an elastic sealing material 8 to fix the joints of the outer wall board. Seal.

As shown in FIG. 2, in the joint groove 4 of the abutting portions of the outer wall boards 1 and 1 adjacent to each other, the bottom wall 2 is provided.
Since the sealant 8 is covered with the bond breaker 7, the sealing material 8 adheres only to the inner walls 3 and 6 of the joint groove 4 which face each other. The material 8 is stretched by elasticity,
Dispersion of stress makes it difficult for fracture to occur.

As described above, when the sealing material 8 is adhered to the inner side walls 3 and 6 of the joint groove 4 on two sides, the conventional outer wall board 9 has a tape-shaped bond breaker 7 as shown in FIG. When the side edge portion of the bond breaker 7 rises along the inner side wall 3 when it is attached to the bottom wall 2 and left and right, the bonding area between the sealing material 8 and the inner side wall 3 decreases.

However, as shown in FIGS. 1 and 2, when the recess 5 is formed in the vicinity of the corner portion of the joint groove 4, the side edge portion of the bond breaker 7 rising along the inner wall 3 is formed as shown in FIG. By pressing into the recess 5 as shown in FIG. 5, it is possible to prevent the bond breaker 7 from covering the inner side wall 3 of the joint groove 4, so that the adhesion area does not decrease, and the inner wall of the recess 5 prevents On the contrary, it may increase.

A recess 5 near the corner of the joint groove 4
In addition to the above, as shown in FIG.

The recess 5 shown in FIG. 3A is a recess provided in a portion of the joint groove 4 which intersects with the inner wall 3 of the bottom wall 2.

The recess 5 shown in FIG. 3B is provided at a portion of the inner side wall 3 of the joint groove 4 which intersects with the bottom wall 2, and becomes narrower as it goes deeper.

The recess 5 shown in FIG. 3C has an inner wall 3 at the corner where the inner wall 3 of the joint groove 4 and the bottom wall 2 intersect.
And the bottom wall 2.

Various kinds of recesses 5 other than those mentioned above are conceivable, and the essential point is that the side edge of the bond breaker 7 can be pushed in.

When the bond breaker 7 is liquid, even if a liquid pool is generated on the bottom wall 2 of the joint groove 4,
Since this liquid pool flows into the recess 5, the coating of the inner side wall 3 of the joint groove 4 of the bond breaker 7 is prevented.

In this embodiment, one side edge of the outer wall board 1 and the joint groove 4 are provided, but they may be provided at both side edges.

[0027]

[Effect] The outer wall board according to the present invention, which is configured as described above, can prevent the bond breaker from covering the inner side wall of the joint groove, and can prevent the sealing material and the inner side wall of the joint groove from being covered. Since the bonding area can be secured sufficiently,
Even a thin outer wall board has the effect of making it difficult for the joint sealing to peel off.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outer wall board according to an embodiment of the present invention.

FIG. 2 is a transverse perspective view showing a sealing state of joints of the outer wall board of the above.

FIG. 3 is a sectional view showing another aspect of the outer wall board of the same.

FIG. 4 is a cross-sectional view showing a sealing state of joints of a conventional outer wall board.

[Explanation of symbols]

 1 outer wall board 2 bottom wall of joint groove 3 inner wall of joint groove 4 joint groove 5 recess 6 inner wall facing inner wall of joint groove 7 bond breaker 8 sealing material 9 conventional outer wall board

Claims (2)

[Claims] 1. An outer wall board having a joint groove formed along at least one side edge portion, the bottom wall facing the front surface side and the inner wall facing the end face side, and the inner wall and the bottom wall intersect each other. An outer wall board having a bond breaker accommodating recess formed in the vicinity of a corner portion. 2. A plurality of outer wall boards, each having a joint groove formed of a bottom wall facing the front surface and an inner wall facing the end surface, are abutted along at least one side edge portion, and the joint groove of the abutting portion is formed. In a method of constructing an outer wall board in which a bottom wall is covered with a bond breaker and a sealing material is filled in a joint groove, in the vicinity of a corner portion where the bottom wall and the inner wall of the joint groove of the outer wall board intersect, a bond breaker accommodation recess is formed. To prevent the bond breaker that covers the bottom wall of the joint groove from covering the inner wall of the joint wall.