JP2577568Y2 - Backup material for joint structure of building board and its joint structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backing material for a joint structure of a building board which is continuously stretched as an exterior material on a body structure of a building and a joint structure thereof.

[0002]

2. Description of the Related Art Conventionally, a joint structure in a vertical direction of an inorganic building board has a structure in which a soft synthetic resin caulking is applied to a joint portion so that the joint can expand and contract according to a dimensional change of the building board. However, when caulking is applied to the entire joint of the building board in the vertical direction, a large amount of caulking is required, and rainwater leaks to the back of the building board. For this reason, as shown in FIG. 6 , for example, as shown in FIG.
The caulking 30 is applied to the surface of the joint 29, and the coke 30 is saved and the building board 2 is removed from the joint 29.
8, 28 prevents leakage of rainwater to the back surface.

However, the building board 2 provided for exterior use
8 and 28 are susceptible to changes in the weather environment, and the surface temperature difference between summer and winter is as high as 70 ° C to 80 ° C. Under these influences, the dimensions have changed significantly and the building boards 28 and 28 have grown. In this case, as shown in FIG. 7 , the width of the joint portion 29 is reduced,
The backing material 21 and the caulking 30 receive a pressure and the caulking 30 projects to the joint surface 29 surface side, thereby damaging the appearance of the building. Thus, there is a problem that rainwater infiltrates from the joints 29 to the back side of the building boards 28, 28.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention alleviates the fact that the coking applied to the joints protrudes to the joint surface even if the width of the joints changes due to the dimensional change of the building board. An object of the present invention is to provide a joint structure backup material and a joint structure thereof for preventing a decrease in waterproofness, thereby solving the above-mentioned problems of the prior art.

[0005]

That is, the joint structure backup material of the present invention has a rectangular cross section inside.
Was a hollow section made of a rectangular prismatic molded body made of soft synthetic resin, the upper surface portion of the angular cylindrical molded bodies together obtained by forming the cross section concave arc shape, the left and right sides of the upper surface portion transverse top to protrude Tatsuno-like projection Ri name provided integrally with, and angular tubular shaped body for contact with the joint wall, the
The Rukoto to have a side wall facing contact with the joint wall is a backup material for a joint structure of the building board to Tokute'. Further, the joint structure of the present invention uses the joint structure backup material according to claim 1, and connects the joint structure backup material to the joint wall between the building boards by facing the side wall of the rectangular cylindrical molded body to the joint wall. Let
In addition , they are arranged without being adhered to each other, and the upper surface of the joint structure backup material is made to face the front side of the joint, and the left and right projecting portions projecting upward in the lateral direction are respectively attached to the left and right joint walls. A joint for a building board, wherein an upper surface of the rectangular tubular molded body is arranged so as to have a concave arc-shaped cross section, and a surface of the joint is filled with caulking made of a soft synthetic resin. Structure.

In the joint structure using the joint structure backup material, the rectangular cylindrical molded body is made of a soft synthetic resin, has a rectangular hollow portion inside, and faces the joint wall.
It has a contacting side wall . Therefore, when the building board is elongated and the width of the joint is reduced (FIG. 3) , the joint structure backup material is stretched upward by the joint wall being pressed by the joint wall , and the concave section is formed. The arc-shaped upper surface is strongly curved downward, and the concave volume of the upper surface increases (FIG. 3) . On the other hand,
The working material should extend in the vertical direction with the compression.
But the extension is due to the concave arc
Absorbed in the increased concave volume on the upper surface
Is done. Therefore, the caulking in contact with the upper surface of the joint structure backup material is prevented from protruding to the joint surface. On the other hand, when the shrinking are building board opposite to that which the width of the joint portion is enlarged (FIG. 4), the said rectangular tube shaped body
A gap is created between the side wall and the joint wall of the building board. That
Therefore, the joint structure backup material expands in the lateral direction, and its upper surface has a weak curvature . Therefore, the concave volume of the upper surface is reduced, and the caulking is prevented from coming off the building board. Further, the left and right sides of the upper surface portion is integrally lateral
The two protruding portions made of a soft synthetic resin protruding upward are provided. Therefore, when the joint structure backup material is inserted into the joint portion, the two projecting portions strongly contact the joint wall of the joint portion to ensure a seal between the two and the two projecting portions are connected to the joint projecting portion. Follow the reduction and enlargement of the joint width well. Therefore, as described above, the protrusion and detachment of the coking can be further prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
The backup material 1 shown in FIG. 1 is formed by extruding a soft synthetic resin material. The upper surface of a rectangular cylindrical molded body 3 having a hollow portion 2 is formed in a concave arc shape 4, and the upper surface of the rectangular cylindrical molded body 3 is formed. On both sides of the backing material 1, a strip-shaped mounting piece 6 is adhered in an inverted T-shape, and on both sides of the mounting piece 6, a U-shaped upward is formed. Folded pieces 7 and 7 which are folded in a shape are continuously provided.

In the joint structure using this backup material 1, as shown in FIG. 2, the mounting piece 6 is set at a required position of a building driving body (not shown), and the building boards 8, 8 side portions are backed up. 1 and fixed to the mounting piece 6 with nails or the like (not shown) while being pressed slightly, and the backup material 1 is arranged at the bottom of the joint 9 between the building boards 8, 8. A coking 10 made of a soft synthetic resin is applied to the surface of 9 and the surface of the coking 10 is aligned with the surfaces of the building boards 8 and 8.

In the joint structure of the present embodiment, the upper surface of the concave arc-shaped section 4 has a required concave volume S.
And the rectangular cylindrical molded body 3 is made of a soft synthetic resin, and
Inside the square hollow part 2 and the side facing the joint wall
With walls. Therefore, as shown in FIG. 3, when the building boards 8 and 8 are elongated and the width of the joint 9 is reduced,
As shown in the figure , the side wall of the backup material 1 is easily compressed in the width direction. Therefore, the backup material 1
The upper surface of the cross-section concave arc-like 4 is strongly curved downwardly extend into indentations volume S (in the normal state Fig. 2), recessed volume S1 (FIG.
3) . On the other hand, caulking material
Attempts to expand in the vertical direction,
Is the upper surface of the backup material with a concave arc cross section.
It is absorbed by the increased dent volume. Therefore, it is alleviated that the caulking 10 in contact with the upper surface of the joint structure backup material 1 projects to the surface side due to the reduction in the width of the joint 9. Conversely, as shown in FIG. 4, even when the building boards 8, 8 are reduced and the width of the joints 9 is increased, the rectangular cylindrical molded body 3 is made of a soft synthetic resin and is internally provided. Square
Jo hollow portion 2, and has a side wall. Therefore ,
As shown in the figure , a gap is formed between the side wall and the joint wall.
Te, backup material 1 is expanded in the lateral direction, the arcuate top surface portion of that is to rather weak curvature. Therefore, the concave volume S (FIG. 2) is reduced to the concave volume S2 (FIG. 4) .
Therefore, the caulking 10 is prevented from coming off the building boards 8.

[0010] The backup material of the present invention is the same as the above .
As described above, the left and right side surfaces of the upper surface portion have two laterally projecting protrusions 5 and 5, so that the two convex protrusions come into strong contact with the joint wall of the joint portion, and the two joint protrusions 5 and 5 protrude. Ensure seal between . Further, the two projecting portions follow the reduction and enlargement of the joint width with good compatibility. Therefore, as described above, the protrusion and detachment of the caulking 10 can be further prevented.

[0011]

[Effect of the Invention] As described above, in the present invention,
When using the backup material, even if the width of the joint changes due to the dimensional change of the building board, the concave volume of the concave upper surface of the backup material can be expanded and contracted in accordance with this change, and therefore the core applied to the joint is Waterproofing of the joint by preventing the king from deviating from the building board by preventing the king from protruding toward the joint surface even when the building board changes its dimensions, and preventing the coking from coming off the building board. Can be improved.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a backup material according to an embodiment of the present invention.

FIG. 2 is a front sectional view of the same example in a building construction state.

FIG. 3 is a front sectional view for explaining the operation of the above example when the joint is reduced.

FIG. 4 is a front sectional view for explaining Sakuoka when the joint is enlarged in the above example.

FIG. 5 is a perspective view of the above example in a building construction state.

FIG. 6 is a front sectional view of a conventional example in a building construction state.

FIG. 7 is a front sectional view for explaining the operation of the above example when the joint is reduced.

[Explanation of symbols]

 1. . . Backup material, 3. . . Molded body, 4. . . 7. Concave section, . . Building board, 9. . . Joint, 10 . . Caulking,

Claims (2)

(57) [Scope of request for utility model registration] 1. A internal cross section having a hollow portion which is closed in a square shape, made of rectangular prismatic molded body made of soft synthetic resin, the upper surface portion of the angular cylindrical molded body in the sectional concave arc shape In addition to the above, the left and right side surfaces of the upper surface portion are integrally provided with two projecting portions projecting upward in the lateral direction for making contact with the joint wall.
And the rectangular cylindrical molded body is a side wall that is in contact with the joint wall.
Joint structure for the backup material of building board and said Rukoto to have a. 2. The joint structure backup material according to claim 1, wherein the joint structure backup material is provided at a joint between building plates and a side wall of the rectangular cylindrical molded body is opposed to the joint wall.
Allowed, and arranged without being bonded to each other and said together to face the upper surface portion of the joint structure for backup material, each of the left and right of joint the left and right horn-like projection which projects laterally top on the front side of the joint portion An architectural board characterized in that an upper surface portion of the rectangular cylindrical molded body is arranged on a wall so as to have a concave arc-shaped section, and a surface of the joint portion is filled with caulking made of a soft synthetic resin. Joint structure.