JP2003213807A - Joint material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint material maintaining sealing performance at a joint even with a slight change of joint width owing to high sealing performance of a hollow part in which the whole curved part is elastically deformable in the joint material having the hollow part of semi-cylindrical outline cross section made of resin or rubber and formed of a flat part and the curved part, and a thermally expansive refractory material 14 thermally expanded in case of a fire to close the joint and to shut out flames and heat. <P>SOLUTION: This joint material 10 has a recessed groove 12 in the outer surface of the flat part 11a of the hollow part 11, and the thermally expansive refractory material 14 is fitted into the recessed groove 12 and bonded to the bottom of the recessed groove by a pressure sensitive adhesive double coated tape 13. A pressure sensitive adhesive double coated tape 15 is provided for bonding the joint material 10 to the end face of an external facing material 1a. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint material having fire resistance which is attached to joints between end faces of an exterior material of a building outer wall, for example.

[0002]

2. Description of the Related Art Gaskets used as joint materials are generally made of molded products such as resin and rubber. Since these molded products are flammable and have no fire resistance, they are not suitable for installation in places where fire resistance is required. A refractory material made of asbestos, graphite, calcium carbonate foam, etc. is attached separately.

FIG. 4 shows a conventional joint structure between the end faces of the exterior material of the building outer wall which additionally uses a refractory material. The construction is carried out by using the gasket 21 of the secondary water blocking material on the end surface of the exterior material 1a. After mounting with double-sided adhesive tape 23, another exterior material 1
b is attached on the frame 2 adjacent to the exterior material 1a, and then the refractory material 22 is inserted into the joint 3 between the exterior materials 1a and 1b, and then the backup material 5 for supporting the sealing material 4 is attached.
Although it is carried out by inserting the sealing material 4 and the sealing material 4, it is troublesome and troublesome to insert the refractory material 22 into the joint 3 of the narrow space and then the backup material 5.

It is also known that a molded product is integrated with a refractory material. JP-A-4-52338, JP-A-8-312023
No. 2000-54526 and the like. Among them, in Japanese Patent Laid-Open No. 2000-54526, as shown in FIG. 5, the curved portion 2 made of synthetic rubber foam is used.
4 has a bulge portion 26 in which a core portion 25 made of a refractory expander is embedded.

[0005]

In the gasket shown in FIG. 5, since the core portion 25 of the refractory expansive body is integrated, the man-hour required for construction of the joint material is small, and forgetting to attach the fireproof material can be eliminated. The joint material and the refractory material are compactly integrated, it is not necessary to secure a space for installing the refractory material other than the joint material in the joint, and since the curved portion 24 is hollow, it is highly watertight and the joint width d However, the core portion 25 does not have elasticity. Although the curved portion 24 has elasticity, the protrusion amount h from the core portion 25
Since the range is small, the elastically deformable range is narrow, and it is not possible to sufficiently cope with the change in joint width.

Since the gasket shown in FIG. 5 also has the core portions 25 on both sides, the width w tends to be wide, and it may not be used for joints having no depth. If the core portion 25 is provided on only one side, the width w can be narrowed, but in this case, the amount of the core portion 25 on one side is increased, so that the bending portion 24 is bent from the core portion 25. The protrusion amount h is further reduced. The present invention has a hollow portion, solves the above problems of the joint material having a heat-expandable refractory material, excellent sealing properties,
This makes it easier to respond to changes in joint width.

[0007]

According to a first aspect of the present invention, there is provided a hollow portion made of resin or rubber, which is made of a flat portion that is in close contact with one end surface that forms a joint and a curved portion that is crimped to the other end surface, and the hollow portion. It is characterized by being made of a heat-expandable refractory material that is integrally provided on the flat portion that forms the.

According to the present invention, since the refractory material is thermally expansive, it can expand and block joints during a fire to block flames and heat. However, the location where the refractory material is provided is flat in the hollow portion. Since the curved portion is not provided in the curved portion, the entire curved portion can be elastically deformed.

A resin or rubber is used as a material for the hollow portion of the present invention. When a resin is used, for example, a polyolefin such as polypropylene, polyethylene or polybutene, a thermoplastic resin such as polystyrene, acryl, polyamide or polyurethane is used. As the rubber, for example, butyl rubber, ethylene-propylene-diene terpolymer EPDM or the like can be used.

Examples of the refractory material include graphite such as asbestos, calcium carbonate foam, natural scaly graphite, pyrolytic graphite and quiche graphite, and these are preferably adhesive or tacky resins such as styrene elastomer. Included in SEBS, epoxy resin, etc.

If the thermal expansion temperature of the refractory material is equal to or higher than the melting or softening temperature (hereinafter referred to as "molding temperature") of the material when the hollow portion is extruded, the refractory material may be coextruded with the hollow portion. However, if the molding temperature is lower than the molding temperature, the hollow portion is molded and then attached to the flat portion of the hollow portion with, for example, an adhesive or a double-sided adhesive tape, or by fitting.

The joint material is attached to the joint by adhering one of the exterior materials to the exterior material in advance with an adhesive or an adhesive means such as a double-sided adhesive tape, and then installing the other exterior material. If the adhesive or adhesive function is provided as described above, the above-mentioned adhesive means can be omitted. In addition, when building the other exterior material, by rubbing the hollow part with the exterior material, it is less likely that the joint material adhered to one exterior material will peel off from the one exterior material. It is desirable that the surface of the hollow portion be surface-treated with silicone or the like to have lubricity.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the refractory material has a thermal expansion temperature not lower than the molding temperature of the hollow portion. According to the present invention, the refractory material can be coextruded as described above, and the work of attaching the refractory material to the flat portion of the hollow portion after molding can be omitted by the coextrusion.

When the thermal expansion temperature of the refractory material is lower than the molding temperature of the hollow portion, it is necessary to mount the refractory material after cooling the molded hollow portion. The refractory material can be attached by, for example, bonding or fitting, and in the case of adhering, the refractory material is made to have tackiness or adhesiveness as described above, and it is not necessary to use an adhesive agent or a double-sided adhesive tape. It is desirable to do so.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention according to, the refractory material is contained in a resin having adhesiveness or tackiness. According to the present invention, an adhesive or a double-sided adhesive tape is not required for adhering a refractory material to a flat portion of a hollow portion, or for adhering a joint material to an end face forming a joint, and thus it is possible to apply an adhesive or to apply an adhesive tape. The attaching work can be omitted.

The invention according to claim 4 is characterized in that, in the invention according to claims 1 to 3, a concave groove is formed on the outer surface of the flat portion of the hollow portion, and a refractory material is mounted in the concave groove.
According to the present invention, since the refractory material is mounted in the groove, the refractory material is not peeled or separated.

The invention according to claim 5 is characterized in that, in the invention according to claim 4, the entrance of the concave groove is narrowed and the size thereof is smaller than that of the refractory material. According to the present invention, the refractory material is pushed in and forcibly fitted to be mounted in the groove.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a joint material 1 according to the present invention.
A joint structure using 0 is shown, and those having the same structure as that shown in FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted. As shown in FIG. 2, the joint material 10 is composed of a flat portion 11a and a curved portion 11b, and a hollow portion 11 made of EPDM sponge rubber having an external cross section in the shape of a hoop, and an outer surface of the flat portion of the hollow portion 11. It is attached to the groove 12 to be formed and is adhered to the groove bottom by the double-sided adhesive tape 13, for example, MEDHIHIKUT H (trade name) manufactured by Mitsui Kinzoku Kagaku Kagaku Co., Ltd., and a cut sheet G E manufactured by Asktechnica Co., Ltd.
A thermally expansive refractory material 14 made of XP57 (trade name);
It is composed of a flat portion 11a and a double-sided adhesive tape 15 with release paper attached to the refractory material 14.

According to the joint material 10 of the present embodiment, since the refractory material 14 is thermally expansive, it is possible to thermally expand and block the joints in the event of a fire to block flames and heat, and by peeling the release paper. The joint material 10 can be adhered to the end surface of the exterior material because it can be adhered to the end surface of the exterior material, the refractory material 14 is not easily peeled off or fallen off because it is installed in the groove, and the fire resistant material 14 is integrated. It is not necessary to insert the refractory material 14 into the joints by itself, the man-hours are reduced, the forgetting to attach the refractory material 14 is not caused, and the joint material 10 can be installed in any space. , It is not necessary to secure a space for attaching the refractory material afterwards, and the hollow portion 11 has a wide elastically deformable range because the entire curved portion 11b is elastically deformable, which is suitable for changing the joint width. The effect of that such easily.

The joint material 17 shown in FIG. 3 has a thermal expansion temperature of E.
After extrusion molding of a hollow part 19 having the same structure and the same material as the hollow part 11, a refractory material 18 in which graphite, which is a material lower than the molding temperature of PDM sponge rubber, is impregnated in styrene elastomer SEBS, and then the temperature of the hollow part 19 When the refractory material 18 is extruded in a state of being lowered and is inserted into the concave groove 20 of the flat portion of the hollow portion 19, the refractory material 18 slightly protrudes from the flat portion 19a as shown in the drawing, and is attached to the end surface of the exterior material 1a. It is supposed to be glued. Further, in the joint material 17 shown in FIG. 3, the material of the hollow portion 19 is EPDM.
If a material (for example, thermoplastic resin) having a molding temperature lower than the thermal expansion temperature of the refractory material (for example, graphite) is used instead of the sponge rubber, the hollow portion 19 and the refractory material 18
It is also possible to co-extrude.

According to the joint material 17 of this embodiment, the refractory material 18 is co-extruded as compared with the joint material 10 described above.
There is a further effect that the step of attaching the refractory material to the joint material is unnecessary, the number of steps is reduced, and the double-sided pressure-sensitive adhesive tapes 13 and 15 are unnecessary, so that the cost can be reduced.

Although the joint materials 10 and 17 in each of the above embodiments are adhered to the end surface of the exterior material 1a, they may be inserted into the joints by being pushed. In this case, an adhesive agent or a double-sided adhesive tape for adhering the joint material to the end surface of the exterior material is unnecessary. Although the joint materials 10 and 17 of the above-mentioned embodiment are also used as the secondary water stop material, in another embodiment, the sealing material 4 and the backup material 5 shown in FIGS. Only 10 and 17 are used.

[0023]

According to the first aspect of the present invention, when a fire occurs, the joints are thermally expanded to block the joints, and the flame and heat can be shielded. Since the refractory material is integrated, it is possible to mount the joint material only. Since it is not necessary to insert the joint in the joint, the man-hour for joint construction is reduced accordingly, there is no forgetting to attach the refractory material, and the joint has enough space to mount the joint material. Since there is no need to secure a space for installing a refractory material, the hollow part has a wide elastic deformable range because the entire curved part can be elastically deformed, and even if the joint width changes a little Can be maintained.

According to the invention of claim 2, it is possible to omit the work of co-extruding the refractory material and attaching the refractory material to the flat portion of the hollow portion. According to the invention of claim 3,
The refractory material can be adhered to the flat portion of the hollow portion or the joint material can be adhered without using an adhesive or a double-sided adhesive tape.

According to the invention of claim 4, the refractory material is unlikely to peel or come off. According to the invention of claim 5, the refractory material can be attached only by pushing it into the concave groove.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a joint structure using a joint material according to the present invention.

FIG. 2 is a sectional view of a joint material according to the present invention.

FIG. 3 is a cross-sectional view of another example of the joint material according to the present invention.

FIG. 4 is a sectional view of a joint structure using a conventional joint material.

FIG. 5 is a cross-sectional view of another conventional joint material.

[Explanation of symbols]

1a, 1b ... Exterior materials 2 ... frame 3 ... Joint 4 ... Sealing material 5 ... Backup material 10, 17 ... Joint material 11, 19 ... Hollow part 11a, 19a ... Flat part 11b ... Benting section 12 ... 13, 15 ... Double-sided adhesive tape 14, 18 ... Fireproof materials

Claims (5)

[Claims] 1. A resin or rubber hollow portion 11, 19 comprising flat portions 11a, 19a which are in close contact with one end surface 1a forming a joint 3, and curved portions 11b, 19b which are pressure-bonded to the other end surface 1b, Flat part 1 forming the hollow parts 11 and 19
Thermally expansive refractory material 1 provided integrally with 1a and 19a
A joint material characterized by comprising 4 and 18. 2. The refractory material 18 has a hollow portion 11 having a thermal expansion temperature.
The joint material according to claim 1, which has a temperature equal to or higher than the extrusion molding temperature. 3. The joint material according to claim 1, wherein the refractory materials 14 and 18 are contained in an adhesive or tacky resin. 4. A groove 12 is formed on the outer surface of the flat portion 11a of the hollow portion 11.
The joint material according to any one of claims 1 to 3, wherein the refractory material 14 is formed and the refractory material 14 is mounted in the groove 12. 5. The joint material according to claim 4, wherein the entrance of the groove 12 is narrowed and the size thereof is smaller than that of the refractory material 14.