JP2849900B2 - Joint structure and joint sealing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is used for joint structures such as exterior panels, glass joints, sashes, slabs, skirtings, etc. It is excellent in design, durability and weather resistance and is a simple construction method. The present invention relates to a joint structure that can be constructed and a sealing method for the joint.

[0002]

2. Description of the Related Art Sealing treatments are applied to joints such as exterior panels to prevent infiltration of rainwater. Various structures have been proposed to improve weather resistance. First, in explaining such a conventional joint structure,
The general structure of the joint portion will be described, and the outline of various joint structures proposed so far will be described based on the general structure. First, FIG. 19 is a sectional view showing a basic structure of a conventional joint portion as a cross-sectional view. (A) is a diagram in which a sealing material that becomes an elastic member after curing is filled in the joint portion. Instead of filling the sealing material, a fixed-type sealing member is attached to the joint. In the figure, 20 and 20 are exterior panels,
A gap is formed between the panels as a joint portion 21. This joint is filled with the sealing material 22 in (a). Usually, at this time, the joint thickness of the sealing material is defined, and a backup material 23 made of polyolefin, which is difficult to adhere, is attached in advance in order to avoid adhesion on three sides. On the other hand, in (b), the joint portion 21 is sealed by inserting the standard sealing member 24. On the other hand, such a basic structure alone does not provide sufficient sealing performance, and various improvements as described below have already been disclosed.

[0003] Japanese Utility Model Laid-Open No. 3-76901 and Japanese Utility Model Laid-Open No. 3-12
No. 9605 discloses a method in which an adhesive is applied in an auxiliary manner in order to enhance the adhesiveness of the fixed-type seal member, or the adhesive component is filled in a bag-shaped fixed-type seal member. Next, Japanese Patent Application Laid-Open No. 62-72844 discloses a method in which a fixed-type sealing member is first attached to a backup material, and a molten sealing material is poured into a gap and then cured. Japanese Unexamined Utility Model Publication No. 4-137106 discloses a technique in which a metal foil is attached to the surface of a sealing material filled in joints. Further, JP-A-4-47051
The T-shaped member includes a horizontal piece that conceals the front side of the joint, a vertical piece extending in a vertical direction from the horizontal piece, and engages with the vertical piece of the T-shaped member to engage the back edge of the joint. A joint structure with a stop to stop is shown.

[0004] Japanese Patent Application Laid-Open No. Hei 4-32643 discloses a method in which an epoxy adhesive is applied to a surface constituting a joint, a fixed sealing member having a hollow structure is inserted, and air is blown into the hollow portion. The epoxy adhesive is completely brought into close contact by being fed. JP-A-2-1
No. 15434 is a fixed-type sealing member which is elastically deformable substantially equal to the joint width, has a recess formed on the back surface, and is filled with a sealing material which does not flow out in a natural state where no external force is applied to the recess. In this case, an overflow channel is provided which can be elastically deformed by an external force after being inserted into the joint and overflow the sealing material from the recess. Japanese Patent Application Laid-Open No. Sho 62-153441 discloses a method of sealing a siding material with joints by combining an irregular-shaped seal material and a fixed-form seal material.

[0005]

The most important factor in discussing the weather resistance of the joint portion is a deterioration phenomenon of the sealing material due to the irradiation of ultraviolet rays. This is because the crosslinking density of the sealing material increases due to UV irradiation,
As the modulus increases, stress on the bonding interface concentrates,
As a result, cracks are generated in the stress concentration portion or the area of adhesion to the panel is reduced due to peeling, and deterioration such as choking on the surface of the sealing material occurs. For example, when filling the sealant in winter when the joint interval is the widest, the joint interval decreases as the temperature rises, and as a result of the compressive force applied to the sealant, a large strain remains at a place where stress is concentrated, and permanent set and It is encouraged by becoming.

Therefore, it is desired that the joint structure be capable of absorbing the change of the joint interval between winter and summer without irradiating the sealing material with ultraviolet rays, and that does not require much labor during construction. However, among the conventional joint structures described above, those disclosed in Japanese Utility Model Laid-Open Publication No. 3-76901 and Japanese Utility Model Laid-Open Publication No. 3-129605 improve the sealing property by curing the adhesive, but complicate the structure of the fixed sealing member, Leakage of the adhesive from the bag-shaped part is also a concern. Next, JP-A-62-2
In the device described in No. 72844, although the sealing property is improved by using a fixed sealing member and a fluid sealing material in combination, it is difficult to completely pour the sealing material into the complicated voids, and the state where the fluid is poured is also difficult. Since it cannot be confirmed, there is a problem that the sealing reliability is lacking, such as the occurrence of an insufficiently filled portion. However, on the other hand, if the filling is performed reliably, the sealing material will be a three-sided bond where both panels and the cap are bonded at the same time, and the concentration of stress will significantly deteriorate the joint function such as cracking. is there. Although the design and light resistance of Japanese Unexamined Utility Model Application Publication No. 4-137106 are certainly improved, the movement of the sealing material is hindered, and there is a high possibility of stress concentration in the peripheral portion. Another problem is that the operation becomes complicated. Further, Japanese Patent Application Laid-Open No. 4-47051 is suitable for a partition in a room or the like, but has a drawback that it is difficult to construct a panel for an outer wall of a building. Also in Japanese Patent Application Laid-Open No. 4-32643, although the sealing property is improved, there are problems that the shape of the fixed-type sealing member becomes complicated and that the construction is troublesome. In the one described in JP-A-2-115434,
There is a risk that the sealing material may overflow by mistake during storage, and there is a problem that great care must be taken in handling. Finally, JP-A-62-15
No. 3441, which aims at improving the waterproof sealing performance and workability of joints, solves the above-mentioned conventional problem relating to the stress at the bonding interface of the irregular sealing material due to the fluctuation of the joint spacing. Not something you can do.

As described above, the conventional joint structure and construction method have a disadvantage that the improvement in seal reliability, durability and weather resistance and the workability of the seal work cannot be achieved at the same time. This is because the sealing material is used for the purpose of shielding light while adhering to the design and adhering the fixed seal member, so that the problem of three-sided adhesion cannot be avoided. In addition, since the fixed seal member is not sufficient as a member for absorbing the fluctuation of the joint spacing, there is a problem in the seal reliability.

As described above, the joint structure using the conventional irregular elastic sealing material and the regular sealing material can be summarized as follows. "In the technical idea of bonding and fixing the regular sealing material with an adhesive or the irregular elastic sealing material, the joint is fixed to the joint. The sealing material is pushed into the compressed and deformed state, and the distortion is absorbed following the expansion and contraction fluctuation of the joint interval, or the expansion and contraction fluctuation of the joint interval is absorbed by the fin of the leg of the fixed-shaped sealing material. However, the fixed sealing material itself does not easily absorb the fluctuation of the joint spacing, and the irregular sealing material (adhesive) is only subordinate. "," The deterioration of the irregular elastic sealing material due to ultraviolet rays This is a technical idea of using a substantially T-shaped fixed sealing material having a cap portion and a leg portion in order to suppress the deformation. Is intended to absorb the scaled variation in joint spacing, shaped sealant is two points of those protecting the amorphous elastic sealing materials. ". Above all, solving the problem of three-sided adhesion while reducing the effect of ultraviolet rays, improving the reliability, durability and weather resistance of the seal and improving the seal work by using the legs of the fixed seal member as joint spacing expansion / contraction fluctuation absorbing members. It is an object of the present invention to achieve a high level of compatibility.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a combination of a fixed-type sealing member and an indefinite-type elastic sealing material provides good sealing workability. In addition, the present invention realizes a joint structure having a high sealing property and a joint sealing method. The present invention solving the above-mentioned problems firstly provides a joint structure in which an irregular elastic sealing material and a fixed seal member are used in combination, wherein the fixed seal member has a substantially T-shape including a cap portion and a leg portion. None, the joint spacing expansion / contraction fluctuation absorbing member, wherein the width of the cap portion is substantially equal to or wider than the joint spacing, and at least the legs are formed of an elastic expansion / contraction structure or an elastic expansion / contraction material, wherein the irregular elastic sealing is provided. A part of the fixed-type sealing member is embedded in the material, and a gap is provided between the cap portion and the irregular-shaped elastic sealing material. In such a joint structure, a hollow elastic structure or foam, or a member having a lower modulus than an irregular elastic sealing material is used for the legs, and a fixed seal is provided on both sides of the legs. It is more effective to provide a fin portion at an appropriate position in the longitudinal direction of the member and make the width between both ends of the fin portion substantially equal to or wider than the width of the joint portion.

[0010] In the joint sealing method, after inserting a backup material into the joint, an irregular elastic sealing material having fluidity is embedded in a part of the above-mentioned regular sealing member in the irregular elastic sealing material. Later, the gap between the cap portion of the fixed-type sealing member and the irregular-shaped elastic sealing material is filled to such an extent that a gap may be generated, and then a part of the fixed-form sealing member is filled in the filled irregular-shaped elastic sealing material. It is characterized by being embedded.

[0011]

According to the joint structure and joint sealing method of the present invention, the above problems can be solved by the following operations. That is, when the fixed sealing member is formed in a substantially T-shape including a cap portion and a leg portion and the width of the cap portion is equal to or larger than the joint interval, the cap portion literally plays a role of a parasol. UV radiation is no longer applied to the elastic sealing material, and dust, contamination due to adhesion of dust and discoloration due to the stickiness of the surface of the amorphous sealing material, discoloration, and the surface of the amorphous sealing material generated from the sealing process are removed. Defects such as unevenness and damage to the stripes do not have to be considered as problems. Further, it is possible to eliminate bird damage caused by a crow or the like sticking to the surface of the amorphous elastic sealing material. Further, when the leg portion of the fixed sealing member is an elastic expansion / contraction expansion / contraction fluctuation absorbing member formed of an elastic expansion / contraction structure or an elastic expansion / contraction material, and embedded in an irregular elastic sealing material, the fixed elastic sealing material becomes a fixed elastic sealing material. In addition to the sealing function of each of the sealing members, expansion and contraction of the joint interval can be absorbed by expansion and contraction of the legs of the fixed sealing member and the irregular sealing material. That is, the legs of the fixed seal member are joint space expansion / contraction fluctuation absorbing members, which means that fluctuations in joint spaces are mainly absorbed by the legs. Therefore, usually, when the joint spacing changes, the legs expand and contract without expanding and contracting the amorphous elastic sealing material, and absorb the joint spacing fluctuation. Therefore, the legs of the standard sealing member reduce the stress and the stress concentration at the adhesive interface of the irregular elastic sealing material, particularly at the stress concentration portion. If a gap is provided between the cap portion and the irregular-shaped elastic sealing material, or a fin is provided at an appropriate position in the length direction of the fixed-type seal member on both sides of the leg portion, the sealing operation is excellent as described later. The effect will be exhibited.
In addition, the use of a hollow elastic structure or foam for the legs, or a member having a lower modulus than the irregular elastic sealing material leads to absorbing the expansion and contraction of the joint space extremely efficiently, and the joint space is reduced. Strict joint design and the like in the selection of the amorphous elastic sealing material due to the expansion / contraction fluctuation can be simplified. This is a joint design
The relationship between the joint width (W) and the joint depth (D) is limited to D / W = 1/1 to 1/2 as in the conventional case (conventionally, stress concentration on the bonded portion due to a change in the joint interval). From the viewpoint of preventing the joint, a joint design within such a range has been required), and the joint depth can be increased. This is because the stress concentration at the bonding interface of the amorphous elastic sealing material due to the fluctuation of the expansion and contraction of the irregular shape is reduced, and the seal reliability is improved.

The joint structure is constructed by the following method. First, a back-up material is inserted into the joint, and then an irregular elastic sealing material having fluidity is filled. Then, the above-mentioned fixed-type sealing member is inserted thereon, and the joints are concealed by the cap portion, for example, simply by embedding the legs in the filled irregular-shaped elastic sealing material, thereby completing the joint sealing work. . In this case, the fins provided on both sides of the leg allow the leg to be positioned at a predetermined position of the joint without special positioning. Here, the amount of the irregular-shaped elastic sealing material to be filled into the joint portion is determined by embedding a part of the fixed-form sealing member in the irregular-shaped elastic sealing material, and then between the shade portion of the fixed-form sealing member and the irregular-shaped elastic sealing material. Is set to such an amount that a gap may be generated.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a sectional view showing a first embodiment of the present invention. In the illustrated example, a backup material 3 is inserted into a fixed position of a joint portion 2 between two exterior panels 1 and 1, and an appropriate amount of an irregular elastic sealing material 4 is filled thereon. A fixed sealing member 5 having a substantially T-shape in cross section, which is constituted by a portion 7, is attached so that a part of its leg 6 is embedded in the irregular elastic sealing material 4. A gap is provided between the irregular elastic sealing material 4 and the cap portion 7 and the cap portion 7 is set wider than the joint interval so that the joint portion 2 is concealed by the cap portion 7. . Further, on both sides of the leg 6, fins 8 having a width between both ends substantially equal to the width of the joint are provided, and define the position of the leg 6 in the joint 2.
Further, the fin portion 8 is also useful for making the sealing of the joint portion more reliable. In particular, when sealing performance is expected, the width of the joint portion is larger than the width between both ends. Should be set to be wider.

Further, FIG. 1A shows the case where the joint interval is wide in winter or the like, and FIG. 2B shows the case where the interval is narrow in summer or the like. By using the elastic structure having a hollow structure for the leg 6, it is possible to follow the change in the joint spacing seen in (a) and (b) mainly by expanding and contracting the width of the leg 6. . And, temporarily, the outer wall panels 1, 1 and the irregular elastic sealing material 4
Even if there is a gap between the fin portion 8 and the fin portion 8, the secondary effect that rainwater can be prevented from entering can be obtained. In this embodiment, as shown in the figure, a hollow elastic structure composed of two plate-like members 9, 9 connected at the ends is used as the leg 6, and the center part of the elastic member is connected to the connecting member 10 as shown in FIG.
Therefore, the follow-up deformation of the leg 6 due to the change of the joint interval becomes easier.

Next, FIG. 2 shows a second embodiment of the present invention as a sectional structure. This embodiment differs from the first embodiment in that the cap portion 7 is made of an elastic material and the joint portion 2 is formed.
It has been inserted in. When the cap portion 7 has a hollow structure, the cap portion 7 itself can be stretched and deformed to follow the change in the joint interval seen in (a) and (b). With such a structure, the positioning of the legs is facilitated, and the fins 8 provided in the case of the first embodiment need not be provided. Accordingly, a simpler structure can be provided as the fixed-type seal member 5.

FIG. 3 shows a third embodiment of the present invention.
2 shows an example in which two plate-like members 9a and 9b provided with fins 8 are used without being connected. Here, (a) in the figure shows a case where the joint interval is narrow in the summer season. In this state, the two plate members 9a and 9b are in close contact with each other. Then, as shown in (b), when the joint interval widens in winter, the expansion of the joint interval is absorbed by opening between the two plate-like members 9a and 9b.

As described above, FIGS. 1 to 3 have described the case where the temperature fluctuates in winter and summer as an example. In short, even if the joint interval is enlarged or contracted after the joint is constructed, this expansion / contraction variation Any structure may be used as long as it absorbs the leg. That is, in FIGS. 1 and 2, (a) shows the state where the joint interval is the widest, and (b) shows the state where the joint interval is the narrowest, and in FIG. 3, FIG. (A) shows the state where the joint interval is the narrowest, and (B) shows the state where the joint interval is the widest. Therefore, the degree of opening of the leg portion 6 at the time of construction of the joint is in a state between the above (A) and (B).
Further, FIG. 4 shows a fourth embodiment in which it can be more easily inserted into an irregular elastic sealing material than the first embodiment. In the illustrated example, as in the first embodiment, the leg 6 has a hollow structure. However, a substantially central portion of the leg 6 is inserted so that the leg 6 can be more easily inserted into the filled amorphous sealing material 4. And a rigid plate-shaped member 6c interposed therebetween.
The rigid plate-shaped member 6c only needs to have a certain degree of rigidity, and a wide range of materials from metals to synthetic resins can be used. The rigid plate member 6c can be provided between the two plate members 9a and 9b in the third embodiment.

The structure of the leg is not limited to any of hollow, solid, and combinations thereof. In the first and second embodiments, the leg 6 may have a solid structure. In the second embodiment, the cap portion 7 may have a solid structure. It is of course possible to use a foam without distinction between hollow and solid. In the fourth embodiment, the leg 6 may have a solid structure. Further, as a material of the leg portion 6 and the cap portion 7, a material having a lower modulus (meaning a tensile elastic modulus and a compressive elastic modulus) than an amorphous elastic sealing material is more effective. Here, the leg portion is shown to be located substantially at the center of the joint portion. However, the leg portion may be shifted to one side, and is not limited to this example.

In the case where the expansion / contraction fluctuation of the joint interval is large, it is possible to design a joint having high seal reliability by enlarging the width of the leg 6 with respect to the joint interval or enhancing the expansion / contraction fluctuation absorbing function. Become. Conversely, if the fluctuation of the joint interval is small, the change of the joint interval is
Can be sufficiently absorbed by expansion and contraction, so that a mastic adhesive or a hot melt sealing material having low elasticity can be used.

As a specific example of the material used for the irregular elastic sealing material 4 and the regular sealing member 5, for example, the irregular elastic sealing material 4 is a conventional JIS A575.
Classified by the main components specified in 8, silicone-based, modified silicone-based, polysulfide-based, modified polysulfide-based, acrylurethane-based, polyurethane-based, acrylic-based, SBR-based, butyl rubber-based, and other J
A fluoropolymer not specified in ISA5758,
A hot-melt type elastic sealing material or the like is used.
Known vulcanized rubbers such as DM-based, thermoplastic elastomers such as polyurethane, SIS, modified polyolefin, chlorsulfonated polyethylene, general-purpose plastics such as PVC, thermoplastics called engineering plastics such as polycarbonate and nylon, polyimides and the like Super engineering plastics can be used, and metals such as stainless steel and aluminum, and composite materials such as FRP can also be used. In addition, the cap is made of a material with excellent weather resistance such as silicone rubber,
The legs may be made of a combination of an irregular elastic sealing material and chloroprene rubber which is easy to adhere. The backup material 3 may be a commonly used foamed polyolefin-based material, or a non-combustible inorganic fiber material depending on the use.

As described above, in the joint structure described above, the cap portion 7 of the fixed-type sealing member 5 is exposed on the surface. Coloring and plating are proposed. That is, in the case of coloring, a material which is excellent in weather resistance and is easy to be colored, such as silicone, a fluorine-containing polymer, stainless steel, or aluminum, is used for the cap portion 7, or polycarbonate, nylon, FRP, stainless steel, or the like as shown in FIG. Metals such as aluminum and titanium, and materials having a material sensation such as stones, and those subjected to coloring, mosaicing, plating, and vapor deposition surface treatment may be processed or attached to the cap portion 7 as the exterior member 11. it can. In the case of plating, chrome plating or the like is effective from the viewpoint of weather resistance, and the surface of the cap portion 7 can be directly plated. Next, as a method of preventing the deterioration of the fixed form sealing member 5 itself due to ultraviolet rays,
One consideration is to disperse an ultraviolet absorber in the fixed-type sealing member. Examples of the ultraviolet absorber include phenol-based, benzotriazole-based, and hindered amine-based ones.

Hereinafter, the results of the tensile / compression stress test of the joint portion performed to confirm the effect of the present invention will be described. In the test, the test piece 2 shown in FIG.
5 was produced. Here, the hatched portion 26 is a joint portion, and the irregular-shaped elastic sealing material 4 is applied at 20 ° C. for 7 days + 5 days after the joint application.
Cured at 0 ° C. for 7 days, cured and subjected to testing. The test was performed using a tensile tester (Strograph R-1 manufactured by Toyo Seiki Co., Ltd.) at a pulling speed of 50 mm / min and 10 mm / mi.
Performed at a compression speed of n. [Tensile Test 1] A tensile test was performed with a joint structure as shown in FIGS. (A) shows the degree of embedding of the standard sealing member of 0% (that is, the non-standard sealing member is used, and only the amorphous elastic sealing material 4), and (B) shows the degree of embedding of the leg portion 6 of the standard sealing member 5 is 50%. (The degree of embedding here means the ratio of the embedding depth of the leg 6 of the standard sealing member 5 to the depth of the irregular elastic sealing material 4), and (c) shows the leg of the standard sealing member 5. The embedding degree of the part 6 is 100%. The width and the depth of the joint are 12 mm, respectively, the thickness t of the hollow leg 6 of the standard sealing member 5 is 0.8 mm, and the width a of the hollow is 3 mm.
And The stress was evaluated as the stress when the joint portion was stretched by 50%. Table 1 shows the results. (A) in the table
(C) correspond to (a) to (c) in FIG.
Is described in the margin of the table.

[0023]

[Table 1]

From the above results, it can be seen that the use of the standard sealing member 5 of the present invention greatly reduces the stress at the time of tension (the stress applied to the bonding interface) as compared with the case of using the amorphous elastic sealing material 4 alone. I understand. It can be seen that the effect is greater as the degree of embedding of the leg portion 6 of the fixed seal member 5 is larger.

[Compression test 1] Tension test 1 shown in FIG.
In the same manner as in the above, tests were performed with three types of embedding degree. Except that the compression speed was 10 mm / min, the same test conditions as in the tensile test 1 were used. The amorphous elastic sealing material 4 was made of material A, and the stress was evaluated as the stress at the time of compressing the joint portion by 50%. Table 2 shows the results.

[0026]

[Table 2]

When the joint 26 is made of only the amorphous elastic sealing material 4, a stress approximately four times that at the time of tension is generated at a compression of 50%, and as a result of the above, the compression is more toward the bonding interface than the tension. It can be seen that the stress concentration was severe. However, by setting the degree of embedding of the leg portion 6 of the standard sealing member 5 to 100% as shown in (c), the stress can be reduced to about 比 べ compared to the case where only the amorphous elastic sealing material 4 is used. .

[Compression Test 2] A compression test was performed with a joint structure as shown in FIGS. (A) shows the degree of embedding of the standard sealing member of 0% (that is, only the irregular-shaped elastic sealing material 4 without using the standard sealing member), (B)
The embedding degree of the leg 6 of the standard sealing member 5 is 100%, the thickness t of the hollow leg 6 of the standard sealing member 5 is 0.8 mm,
(C) The embedding degree was 100%, the thickness t of the hollow leg 6 of the standard sealing member 5 was 0.8 mm, and the width a of the hollow portion was 5 mm. And the stress from 10% compression to 50% compression was evaluated.
The other conditions were all the same as those in the compression test 1. Table 3 shows the results.

[0029]

[Table 3]

From the above results, in the case of using only the amorphous elastic sealing material 4, the stress increases as the compressibility increases, while in the case of the combined use with the standard seal member 5 of the present invention, the compressibility does not reach a certain constant. It can be seen that the stress hardly changes and then gradually increases. This is because while the compression deforms the fixed seal member 5 as the joint interval expansion / contraction fluctuation absorbing member and the hollow portion of the leg 6 narrows, there is almost no increase in stress, but eventually the hollow portion of the leg 6 disappears. This means that stress increases due to compression of the amorphous elastic sealing material 4. Therefore, the deformation rate of the joint is obtained by calculating the degree of expansion and contraction of the joint interval (joint expansion and contraction due to expansion and contraction of the panel 1 caused by interlayer displacement of the building due to temperature change during the season and between the seasons and wind pressure). The leg 6 of the fixed seal member 5 to be used
By determining the width of the hollow portion, the stress applied at the time of compressive deformation of the joint can be adjusted. This is the same in the case of tension. As described above, in the present invention, the stress applied to the joint can be significantly reduced as compared with the case where the amorphous elastic sealing material 4 is used alone. [Comparative Test] As a comparative test of each of the above tests, a leg 2 as shown in FIG.
Seal member 2 referred to as a conventional dry seal having
8 was used for a tensile test for comparison. As the fixed-shaped seal member 28, a commonly used hard PVC (Shore D hardness 40) was used. The other test conditions were all the same as the tensile test 1. Table 4 shows the results.

[0031]

[Table 4]

In the conventional fixed-shaped sealing member 28, the leg 25
However, since it is not a joint space expansion / contraction fluctuation absorbing member as in the present invention, even if the legs 27 are embedded, the effect of reducing stress cannot be obtained, and conversely, it becomes higher.

As an example of the shape of the fixed seal member 5,
Other than the above, those shown in FIGS.
FIG. 10 shows a pair of foam legs 6 which can be freely opened and closed.
a, 6b.
This is absorbed by the opening and closing operations of a and 6b. In this structure, as shown in FIG. 11, a rigid plate-like member 6c is interposed between the legs 6a and 6b in order to easily embed the legs 6 in the irregular elastic sealing material 4 at the time of jointing. Is also effective.

In FIG. 12, the leg portion 6 is constituted by a pair of auxiliary leg portions 6e and 6f made of a core material 6d and a foam, and the expansion and contraction of the joint space is controlled by the foam member portions of the auxiliary leg portions 6e and 6f. This is absorbed by the opening and closing operation (displayed with dots).

Further, FIG.
It is needless to say that the folding pieces 6g and 6h are provided, and the expansion and contraction of the joint interval can be absorbed by opening and closing the two folding pieces 6g and 6h.

Next, the sealing method of the joint structure of the present invention will be described. First, the backup material 3 is inserted into the joint portion 2. At this time, it is effective to press-fit a material slightly larger than the joint interval so that no gap is formed between the backup material 3 and the joint portion 2. Next, an irregular elastic sealing material 4 which becomes an elastic member after curing and has a certain degree of fluidity at the initial stage is filled thereon. At this time, the amount of the irregular-shaped elastic sealing material 4 to be filled is determined by filling a part of the fixed-form sealing member 5 into the irregular-shaped elastic sealing material 4 and then covering the cap portion 7 of the fixed-form sealing member 5 and the irregular-shaped elastic sealing material 4. Is set to such an amount that a gap can be generated between them. By embedding at least the leg portions 6 of the fixed sealing member 5 in the fixed elastic sealing material 4 before the fixed elastic sealing material 4 is cured, a series of sealing operations is completed. At this time, since the irregular elastic sealing material 4 is filled in the above-described amount,
It does not protrude from the cap 7. Even if the gap partly disappears in some cases, it does not protrude beyond the cap part 7. Further, by making the back surface of the cap portion 7 non-adhesive in consideration of safety at this time, partial three-surface adhesion can be prevented.

In connection with this, various structures of a portion where two joints intersect can be considered, and an embodiment thereof will be described below with reference to the drawings. Hereinafter, FIGS. 14 to 18 show a plan view of the structure of the intersection, in which the legs are represented by dotted lines. First, FIG. 14 shows a configuration in which a fixed template 5a that is long in the horizontal direction is attached first, and then a fixed template 5b in the vertical direction having a predetermined length is attached.

Next, in the case of FIG. 15, similarly to the case of FIG. 14, the fixed template 5a having a long length in the horizontal direction is mounted first, and then the fixed template 5b of the predetermined length is set in the vertical direction. It was done. However, this example is different from that of FIG. 14 in that the leg 6B of the vertical fixed sealing member 5b is extended to a position in contact with the leg 6A of the horizontal fixed sealing member 5a. Although the fin portion in this case is not particularly shown, it is sufficient that some of the fin portions are appropriately cut at the intersection so as not to interfere in both the horizontal direction and the vertical direction.

Further, as shown in FIG. 16, there is proposed a structure in which a fixed sealing member which is long in both the horizontal and vertical directions can be used. As shown in FIG.
In FIG. 7A, the leg 6A is cut at the intersection, while the cap 7b is cut in the vertical fixed sealing member 5b. In this structure, first, the vertical fixed sealing member 5b is mounted, and then the horizontal fixed sealing member 5a is mounted so that both legs 6B and 6A are inserted into the respective cut portions. Can be realized by In this method, a fixed sealing member that is long in both the horizontal and vertical directions can be used, so that the workability is extremely high.

On the other hand, the one shown in FIG.
This is an example in which a fixed form sealing member that is short in both the vertical direction is used.
In the example shown in the figure, short-form fixed sealing members 5a and 5b each having a 90 ° pointed tip are arranged and mounted so that no gap is formed at the intersection. The divisional shape at the intersection, that is, the tip shape of the fixed-form seal members 5a and 5b is not limited to this example at all, and it goes without saying that various other shapes are possible.

Finally, the one shown in FIG. 18 uses fixed sealing members 5a and 5b which are short in both the horizontal direction and the vertical direction and have a hollow cap portion. These are inserted into the caps of the fixed-form seal members 5a and 5b. The intersection structure capable of realizing the joint structure of the present invention is not limited to the structure shown here, and other general structures using a fixed-type sealing member can be widely used.

[0042]

As described above, in the joint structure and joint sealing method according to the present invention, the following effects can be obtained. That is, if the fixed seal member is formed in a substantially T-shape including a cap portion and a leg portion, and the width of the cap portion is substantially equal to or larger than the joint interval, the cap portion literally plays the role of a parasol. Irradiation of ultraviolet rays to the fixed-type sealing material is eliminated, and deterioration of the irregular-shaped elastic sealing material can be prevented. It is also possible to completely eliminate the effects of contamination due to dust adhesion, defects in finished appearance, and bird damage. Therefore, a joint structure having excellent weather resistance and design properties can be obtained.

Further, when the leg portion of the fixed sealing member is an joint expansion / contraction fluctuation absorbing member formed of an elastic expanding / contracting structure or an elastic expanding / contracting material, a part of this fixed sealing member is embedded in an irregular elastic sealing material. Since the expansion and contraction of the joint spacing can be absorbed by the expansion and contraction of the fixed sealing member and the irregular elastic sealing member, the stress applied to the irregular elastic sealing material is dispersed and absorbed even if the joint spacing changes. As described above, the peeling due to the concentration of stress applied only to the amorphous elastic sealing material and the occurrence of cracks due to fatigue do not occur. Further, the degree of freedom in joint design (width and depth) is improved, and the joint can be designed deeply, so that the bonding reliability based on the increase in the bonding area is improved. Moreover, the design quality is improved by unifying the joint width. In addition, when a one-component amorphous elastic sealing material is used in a conventional joint, the curing proceeds from the surface due to moisture in the air after application, and the surface hardening occurs when the joint spacing changes in the uncured state. There was a problem that cracks occurred in the layer,
In the present invention, even if a one-component type is used as the amorphous elastic sealing material, since the manifestation of various physical properties due to the expansion and contraction fluctuation of the joint interval including the occurrence of the crack is eliminated,
It is also possible to use a one-component amorphous elastic sealing material that cannot be used in the conventional joint structure. This dramatically improves workability during construction. Also,
Since the irregular-shaped elastic sealing material and the fixed-type sealing member each exert a sealing action, it leads to improvement in sealing reliability and weather resistance.

When fins are provided at appropriate positions in the length direction of the fixed sealing member on both sides of the leg, the leg can be positioned at a predetermined position of the joint without special positioning. It helps to improve the performance. In addition, since a gap is provided between the cap portion and the irregular elastic sealing material, there is no need to strictly control the amount of the irregular elastic sealing material to be filled, which also contributes to improving workability. is there. Furthermore, when a part of the fixed-type sealing member is embedded, there is no fear that the irregular-shaped elastic sealing material protrudes from the cap portion, and the design is excellent.

Further, by using a hollow elastic structure or a member having a lower modulus than the irregular elastic sealing material for the cap portion and the leg portion, the expansion / contraction fluctuation of the joint space can be absorbed very efficiently, and the height can be increased. Weather resistance can be realized.

Since the joint structure is constructed by the simple procedure as described above, the workability is extremely high. As described above, according to the present invention, compatibility between sealing performance and workability, which cannot be realized with the conventional structure,
It can be achieved at a high standard. Further, it is possible to prevent the conventional elastic sealing material from deteriorating due to ultraviolet rays, which has been a conventional problem.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing an example of a joint structure according to the present invention;
(A) When the joint spacing widens in winter etc., (b) when the joint spacing narrows in summer etc.

FIG. 2 is an explanatory sectional view showing an example of the joint structure of the present invention;
(A) When the joint spacing widens in winter etc., (b) when the joint spacing narrows in summer etc.

FIG. 3 is an explanatory sectional view showing an example of the joint structure of the present invention;
(A) when the joint spacing narrows in summer etc., (B) when the joint spacing widens in winter etc.

FIG. 4 is an explanatory sectional view showing an example of the joint structure of the present invention.

FIG. 5 is an explanatory cross-sectional view showing an example of a fixed-type sealing member constituting the joint structure of the present invention.

FIG. 6 is a structural explanatory view of a test piece used for stress measurement of a joint structure according to the present invention.

FIG. 7 is an explanatory diagram showing a positional relationship of a fixed-shaped seal member in a test piece used for stress measurement of a joint structure according to the present invention;
(A) shows the case where the fixed sealing member is not provided, (B) shows the case where the embedded degree of the fixed sealing member is 50%, and (C) shows the case where the embedded degree of the fixed sealing member is 100%.

FIG. 8 is an explanatory diagram showing a positional relationship of a fixed-shaped seal member in a test piece used for stress measurement of a joint structure according to the present invention;
(A) without a standard sealing member, (B) with 100% embedding degree of the standard sealing member, (C) with 100% embedding degree of the standard sealing member, wider leg section than (B) Having

FIG. 9 is an explanatory cross-sectional view showing the shape of a comparative standard sealing member used for stress measurement of the joint structure of the present invention.

FIG. 10 is an explanatory view showing another embodiment of the fixed seal member used for the joint structure of the present invention.

FIG. 11 is an explanatory view showing another embodiment of the fixed seal member used for the joint structure of the present invention.

FIG. 12 is an explanatory view showing another embodiment of the fixed seal member used for the joint structure of the present invention.

FIG. 13 is an explanatory view showing another embodiment of the fixed seal member used for the joint structure of the present invention.

FIG. 14 is an explanatory plan view showing a structural example of an intersection in the joint structure of the present invention.

FIG. 15 is an explanatory plan view showing a structural example of an intersection in the joint structure of the present invention.

FIG. 16 is an explanatory plan view showing a structural example of an intersection in the joint structure of the present invention.

FIG. 17 is an explanatory plan view showing a structural example of an intersection in the joint structure of the present invention.

FIG. 18 is an explanatory plan view showing a structural example of an intersection in the joint structure of the present invention.

FIG. 19 is a cross-sectional explanatory view showing a typical example of a conventional joint structure. FIG. 19A shows a joint in which a sealing material that becomes an elastic member after curing is filled in the joint, and FIG. thing

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel 2 Joint part 3 Backup material 4 Irregular elastic sealing material 5, 5a, 5b Regular seal member 6, 6a, 6b, 6e, 6f, 6A, 6B Leg 6c Rigid plate member 6d Core 7, 7a, 7b Cap Part 8 Fin part 9, 9a, 9b Plate member 10 Connecting member 11 Exterior member 12 Crossing member 20 Exterior panel 21 Joint 22 Irregular elastic sealing material 23 Backup material 24 Standard sealing member

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 1/68 E04F 13/08

Claims (6)

(57) [Claims] 1. A joint structure in which an irregular elastic sealing material and a fixed seal member are used in combination, wherein the fixed seal member has a substantially T-shape including a cap portion and a leg portion, and a width of the cap portion is set to a joint interval. A joint space expansion / contraction fluctuation absorbing member having substantially the same or wider width, and at least a leg portion formed of an elastic expansion / contraction structure or an elastic expansion / contraction material, wherein a part of the regular sealing member is provided in the irregular elastic sealing material. A joint structure that is embedded and has a gap between a cap portion and an irregular elastic sealing material. 2. The joint structure according to claim 1, wherein a hollow elastic structure is used for said leg. 3. The joint structure according to claim 1, wherein a foam is used for the leg. 4. A member having a lower modulus than an irregular elastic sealing material is used for said leg.
The joint structure according to any one of Items 1 to 3. 5. A method according to claim 5, wherein a fin is provided at an appropriate position in the length direction of the fixed seal member on both sides of the leg, and a width between both ends of the fin is substantially equal to or larger than a width of the joint. The joint structure according to any one of claims 1 to 4, characterized in that: 6. A fixed elastic sealing material having fluidity after a backup material is inserted into the joint portion, and a part of the fixed sealing material according to any one of claims 1 to 5, wherein the fixed elastic sealing material is partially fixed. 6. After being embedded in the material, filling is performed to such an amount that a gap may be formed between the cap portion of the fixed-type sealing member and the irregular-shaped elastic sealing material, and then any one of claims 1 to 5.
A joint sealing method, wherein a part of the leg of the fixed form sealing member according to the paragraph is embedded in the filled irregular shaped elastic sealing material.