JP2001303686A - Shaped gasket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shaped gasket for raised durability while hard to be stained. SOLUTION: There are provided a jacket body 1 comprising an upper layer part 11 which, in cross-section in length direction and the like, seals a joint width while a decorative surface 11a is formed on an upper surface, and a base body 2 comprising a pillar part 2a which is provided on a lower surface side of the jacket body 1 and inserted into the joint and a fin-like seal part 2b extending sideways from both sides of the pillar part 2a. The jacket body 1 is made from a thermoplastic elastomer while the base body 2 is made from a silicone rubber, to be integrated together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed gasket to be inserted into a joint of an outer wall panel of a unit house or the like.

[0002]

2. Description of the Related Art In a house or the like, a joint is present at a seam portion where panel materials (artificial board, fiberboard, plywood, board, etc.) are combined, including between outer walls. In these joints,
Conventionally, it has been responded by inserting a fixed gasket or performing a caulking process. For a fixed gasket, for example,
A rubber fin that uses EPDM reinforced with carbon black for the fin that plays a role in retaining and stopping water in the joint, and uses EPDM, CSM, CPE, etc. that matches the color and pattern of the outer wall on the exterior part that goes out There is something. Some are entirely made of PVC. Furthermore, the hardness of the core portion is increased so as to improve the workability to be inserted into the joint, eliminate the waving when the joint is settled, and obtain the straightness for improving the appearance (Japanese Patent Laid-Open No. 10-25823). Etc.) and those in which a metal member is inserted. For high-rise buildings and the like, a fixed silicone gasket may be used from the viewpoint of durability and fire resistance. In addition to a fixed gasket, a method of caulking joints with silicone, urethane, acrylic, or the like is also known.

[0003]

However, a fixed gasket made of the above-mentioned EPDM, CSM, CPE, PVC or the like had to be used and replaced in about 10 years because of its durability. Although the silicone-based fixed gasket has a durability of 20 years or more, the material itself has adhesiveness and tends to accumulate due to dust or the like on the surface. As a result, the surface was often stained with black, and the appearance was impaired.
The silicone-based caulking also had the same basic composition as the silicone rubber, and thus was easily stained black.
Other caulks are often stained black, and even if the stain is small, cracks and the like occur over a long period of use, and repair is often performed in about 10 years.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a fixed-shaped gasket which has high durability and is hardly stained.

[0005]

In order to achieve the above object,
The gist of the invention described in claim 1 is that an exterior body (1) having an upper layer portion having a uniform cross-sectional shape in a longitudinal direction, sealing a joint width and forming a design surface on an upper surface, and a lower surface side of the exterior body are provided. And a base (2) having a pillar (2a) inserted into the joint and a fin-shaped seal (2b) extending laterally from both sides of the pillar. Is made of a thermoplastic elastomer, the base is made of silicone rubber, and the two are integrated. The fixed gasket according to the invention of claim 2 is:
2. The method according to claim 1, wherein a pair of hanging portions facing each other are formed on the lower surface of the upper layer portion at a predetermined interval, and a projection is provided on an inner wall of the hanging portion, and a recess between the hanging portions is provided on an upper portion of the pillar portion. Forming an insertion portion to be inserted into the insertion portion and providing a claw on the insertion portion, wherein the claw is locked by the projection when the insertion portion is inserted into the recess. .

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a fixed gasket of the present invention will be described in detail. (1) Embodiment 1 FIGS. 1 and 2 show an embodiment of a fixed gasket according to the present invention. FIG. 1 is a cross-sectional view thereof, and FIG. FIG.

The fixed gasket G has a uniform cross-sectional shape in the longitudinal direction and a symmetrical cross-sectional shape. The fixed gasket G includes an exterior body 1 and a base 2, the joint width is sealed by the exterior body 1, and the base 2 disposed on the lower surface side of the exterior body 1 is inserted into the joint. The joint is pressed and sealed by the elastic force of the fin-shaped seal portion 2b of the base 2, and the fixed gasket G is inserted and fixed to the joint. Here, the exterior body 1 and the base 2 are formed separately, and then they are fitted and integrated to form a long molded product (FIG. 1).

The exterior body 1 has a plate-like shape and has an upper layer portion 11 which seals the joint width and forms a design surface 11a on the upper surface. The outer package 1 is made of a thermoplastic elastomer (TPE: thermoplasti).
c elastomer) (a in Fig. 2). Since the upper surface of the upper layer portion 11 forms the design surface 11a, it is excellent in coloring property and fading resistance, and further has non-adhesion to dirt,
The outer package 1 is made of a thermoplastic elastomer that is less likely to crack. Thermoplastic elastomers are polymeric materials that are plasticized at high temperatures so that they can be molded in the same manner as plastics, and have rubber elastic properties at room temperature.
Due to the rubber elasticity, the primary sealing function of the upper layer portion 11 for sealing the joint width is enhanced. Moreover, on the other hand, the thermoplastic elastomer has a resin molding property, and can be hard, soft, or a combination of two or more types. The straightness similar to that is obtained. Thus,
Rippling of the fixed gasket G when inserted into the joint can be prevented. Thermoplastic elastomers include polystyrene, polyolefin, polyvinyl chloride, polyurethane, polyester, polyamide and the like, and they are used depending on the application. Specifically, for olefin-based TPE, use ONTEX (Pextev / Asahi Kasei) when workability and appearance are important, and use Gudmar H series (Mitsui Petrochemical) when heat resistance is important. Can be In addition, since the fixed gasket G is used exclusively outdoors, a gasket having a weather resistance function is selected. Surface modification and surface coating are performed as necessary, and in some cases, a functional filler is filled.

In the exterior body 1 of the present embodiment, a pair of opposed hanging parts 17 are formed on the lower surface of the upper layer part 11 at a predetermined interval (a in FIG. 2). The hanging portion 17 is a plate-like piece, and in order to ensure the insertion and holding of the base 2 by the hanging portion 17,
The hanging portion 17 in the cross-sectional shape inclines toward the center as it goes downward. The recess 14 having a U-shaped cross section formed between the hanging portions 17 is formed at the entrance 14 of the hanging lower end 17c.
Two wedge-shaped projections 17a are provided on the inner wall facing upward from a. The deepest portion of the recess 14 is an expanded room portion 14b having a quadrangular cross section.

The base 2 has a column 2a and a seal 2b.
Made of silicone rubber. The pillar 2a is arranged on the lower surface side of the exterior body 1 and inserted into the joint. The pillar portion 2a is a main bone that hangs in a T-shaped cross section with respect to the upper layer portion 11 of the exterior body 1. The pillar portion 2a has a bottom portion 2, a main portion 22, and an insertion portion 2.
Consists of three. The seal portion 2b is a fin-shaped body extending laterally from both sides of the main portion 22. In FIG. 2, two fins 25 are provided on each of the left and right sides. When using the fixed gasket G,
As described above, the upper layer 11 seals the joint width formed by the adjacent outer wall panel and the like, and the base 2 is embedded in the joint.
The fixed shape gasket G is inserted and fixed by the elastic force of the seal portion 2b, and the column portion 2a supports the seal portion 2b and the upper layer portion 11, thereby exhibiting a function of sealing water.

The silicone rubber from which the substrate 2 is made has a durability of at least 20 years as a feature. In addition, the silicone rubber has an adhesive property, thereby improving the water stopping performance, and furthermore, the seal portion 2b enhances the function of holding in the joint in combination with the elasticity of the silicone rubber. On the other hand, silicone rubber is
Due to the adhesiveness, there was a defect that the surface became dusty and became black, but in the present invention, as described above, the upper layer 11
However, the disadvantage is solved because the base 2 made of silicone rubber is disposed deeper in the joint than the upper layer portion 11 seals the joint width. Silicone rubber includes polydimethylsilicone rubber, methylvinylsilicone rubber, methylphenylsilicone rubber, fluorosilicone rubber, etc., depending on the organic group bonded to the silicon atom, and is used for its heat resistance, cold resistance, ozone resistance, mechanical properties, etc. It is appropriately selected and used according to. The silicone rubber of the present invention refers to a solid rubber having a siloxane bond (Si-O-).

In the base 2 of the present embodiment, an insertion portion 23 is formed in the upper portion of the column portion 2a so as to be inserted into the recess 14 between the hanging portions 17, so that the fitting portion can be integrated (FIG. 1). 2
B). The insertion part 23 has a claw 2 which is engaged with the protrusion 17a.
3b is provided so that once the exterior body 1 and the base 2 are fitted and integrated, they are hardly detached. Further, when the insertion portion 23 is inserted from the recess 14 to the back to integrate the exterior body 1 and the base 2, a sharp arrowhead portion 23 a is formed at the tip of the insertion portion so as to perform a smooth operation. Reference numeral 23c indicates a support portion of the insertion portion 23.

The fixed gasket G is manufactured, for example, as follows. First, the exterior body 1 and the base 2 are separately formed. Next, an adhesive or the like is applied to the inner wall side of the hanging portion 17 as needed. After that, the insertion portion 23
7 is inserted into the recess 14. The fixed body gasket G is completed by fitting and integrating the exterior body 1 and the base 2 (FIG. 1). Reference symbol S indicates a space formed between the exterior body 1 and the base 2.

(2) Embodiment 2 In this embodiment, as shown in FIGS. 3 and 4, the exterior body 1 shown in FIG.
And the base 2 are a fixed gasket G integrally formed. In order to manufacture an integrally molded product, the insertion portion 23 of the base 2 is inserted into the insertion portion 23 of FIG.
It is not necessary to provide an arrowhead portion 23a as shown in FIG.
Since it is better to eliminate the stopper, a stopper portion 23d having a rectangular cross section corresponding to the expanded portion 14b is formed on the base 2 (FIG. 3). Other configurations are the same as in the first embodiment, and a description thereof will be omitted. The same reference numerals as those in the first embodiment denote the same or corresponding parts. The fixed gasket G is manufactured, for example, as shown in FIG. Silicone rubber is heated to form a shape through a cross-linking reaction, whereas thermoplastic elastomer is melted by applying heat and then cooled to shape the shape, so that simultaneous molding is difficult. Therefore, first, the shape of the base 2 is formed by the silicone rubber extruder 4, and the formation of the base 2 is completed through the vulcanizing tank 5. Then, the base 2 is inserted and a thermoplastic elastomer is supplied from the thermoplastic elastomer extruder 6 to perform integral molding with the base 2, thereby forming a desired fixed gasket G. Since the molded silicone rubber can withstand deformation even at the melting temperature of the thermoplastic elastomer,
The molded silicone rubber substrate 2 is first made into an insert shape, and a thermoplastic elastomer is placed on it to be molded. In FIG. 4, reference numeral 61 indicates a hopper for supplying a thermoplastic elastomer. In the manufacturing method shown in FIG.
When the molding of the base 2 is completed, the line can be cut off once. After winding the substrate 2 in the vulcanizing tank 5,
This is taken to a thermoplastic elastomer extruder 6 at another location, and the base 2 is inserted to form a thermoplastic elastomer.

(3) Embodiment 3 This embodiment is a fixed-type gasket having a cross-sectional shape as shown in FIG. In the fixed gasket G of the present embodiment, the insertion portion 23 on the base 2 side in the first embodiment is moved to the exterior body 1 side, and the hanging portion 17 on the exterior body 1 is moved to the base 2 side as the fitting portion 27. It has become. An insertion portion 13 similar to the insertion portion 23 of FIG. 1 is formed on the lower surface side of the upper layer portion 11 of the exterior body 1, while a fitting portion 27 in which the insertion portion 13 fits over the column portion 2 a of the base 2. To form A projection 27 a is formed on the inner wall of the fitting portion 27. A claw 13b is provided at a position of the insertion portion 13 corresponding to the projection 27a.
Once it has been fitted into the recess 24 of the fitting portion 27, it is difficult to remove it. Further, in the present embodiment, when the guard wall 15 is formed at predetermined intervals on both sides of the insertion portion on the lower surface side of the upper layer portion 11 and the exterior body 1 and the base 2 are integrated, the guard wall 15 27 so as to make it more difficult to remove. Reference numeral 13a denotes an arrowhead portion provided at the tip of the insertion portion 27, and reference numeral 13c denotes a support portion. Other configurations are the same as those of the first embodiment, and a description thereof will be omitted. The same reference numerals as those in the first embodiment denote the same or corresponding parts.

The fixed gasket G thus configured is
A thermoplastic elastomer is used for the upper layer portion 11 (exterior body 1) which seals the joint width and is in direct contact with the outside air, and a silicone rubber is used for the base portion 2 disposed in the joint on the lower surface side of the outer case 1 Since they are built, functions can be shared. The sealing function is enhanced by forming the base 2 with silicone rubber,
It is possible to effectively exhibit the waterproofness required for the fixed-shaped gasket G and the function of holding the gasket G in the joint. Further, by using silicone rubber, a long service life and fire resistance can be ensured. On the other hand, a disadvantage of silicone rubber that is easily stained is that the exterior body 1 covering the joint width is protected, so that the silicone rubber is not easily stained. Should the base 2 get dirty,
The base 2 is a portion buried in the joint, and has a design surface 11a.
There is no problem because it is not a place that appears.

Further, since the thermoplastic elastomer is used for the exterior body 1, its characteristics can be utilized without any problems.
Although the upper layer portion 11 of the exterior body 1 becomes the design surface 11a, the adoption of the thermoplastic elastomer makes it possible to produce a desired shaped gasket G having excellent coloring properties and a desired appearance. And unlike silicone rubber, dirt hardly adheres and hardly fades, so that a good appearance can be maintained forever. In addition, the thermoplastic elastomer is hard to crack, is stable in quality over a long period of time, and can exert its function as a fixed gasket G without any problems. Furthermore, if the exterior body is made of a hard thermoplastic elastomer, straightness is ensured, so that it is not necessary to perform insert molding of a metal member or the like which has been conventionally performed, and the fixed gasket G inserted into the joint is not required. A clear fit state is ensured without a waving phenomenon. Moreover, since the thermoplastic elastomer is a resin material, it has various advantages as compared with a metal member, such as better handling, excellent cutability, less deformation, light weight, and no rust. Of course, the thermoplastic elastomer is provided with elasticity as compared with the conventional resin, and the primary sealing function in the upper layer portion 11 is enhanced even when the upper layer projecting portion 11b blocks the joint and is placed on the outer wall panel. In addition, even when the upper layer portion 11 is bent into the joint, deformation can be satisfactorily performed by the elastic properties of the thermoplastic elastomer.

In the third embodiment, the thickness L of the fitting portion 27 may be too small depending on the case, and it may be difficult to form the base shown in FIG. 6 in manufacturing. Even in such a case, since the production can be performed without any trouble in the first and second embodiments, the fixed gasket G shown in FIGS. 1 to 4 has a more preferable shape.

It should be noted that the present invention is not limited to the embodiment described above, but can be variously modified within the scope of the present invention depending on the purpose and application. The shape, size, number, and the like of the outer package 1, the base 2, the column 2a, the seal 2b, and the like can be appropriately selected according to the application.

[0020]

As described above, the shaped gasket of the present invention has excellent effects such that a good-looking one can be obtained, the appearance is not impaired over a long period of time, and the durability can be improved as compared with the conventional product. Demonstrate.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a fixed gasket according to a first embodiment.

2A is a cross-sectional view of an exterior body of the fixed gasket of FIG. 1, and FIG. 2B is a cross-sectional view of a base of FIG.

FIG. 3 is a cross-sectional view of a fixed gasket in Embodiment 2 in which an exterior body and a base are integrally formed.

FIG. 4 is an explanatory perspective view of one manufacturing process of the fixed gasket of FIG. 3;

FIG. 5 is a cross-sectional view of a fixed gasket according to a third embodiment.

FIG. 6 is a cross-sectional view of the base portion of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer body 11 Upper layer part 11a Design surface 14 Concave part 17 Hanging part 17a Projection 2 Base 2a Column part 2b Seal part 23 Insertion part G Standard gasket

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E001 DA01 FA04 FA51 GA12 GA64 HD11 HD13 HE01 KA03 LA09 MA02 MA04 3J040 BA07 EA01 EA16 EA25 EA46 FA06 HA15 HA30

Claims (2)

[Claims] 1. An exterior body (1) having an upper layer portion having an equal cross-sectional shape in a longitudinal direction, sealing a joint width and forming a design surface on an upper surface.
A base (2) provided with a pillar (2a) arranged on the lower surface side of the exterior body and inserted into the joint, and a fin-shaped seal (2b) extending laterally from both sides of the pillar; ), Wherein the exterior body is made of a thermoplastic elastomer, the base body is made of silicone rubber, and the two are integrated. 2. A pair of hanging portions facing each other at a predetermined interval on a lower surface of the upper layer portion, and a projection is provided on an inner wall of the hanging portion. 2. An insertion portion to be inserted into the recess, and a claw provided on the insertion portion, wherein when the insertion portion is inserted into the recess, the claw is locked by the projection. Shaped gasket.