JPH09302330A - Joint material for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject joint material free from shrinkage of joint material after execution, having flexibility, not causing untwisting in working and useful for outer walls of houses, shops, etc., by using a twisted wire of a metal as a core material. SOLUTION: This joint material has (A) a design face 1, (B) a supporting part for supporting the design face 1 and (C) a valve material extended from the supporting part and is made of a resin. In this joint material, a twisted wire of a metal is embedded as a core material 3 in the component B. Furthermore, it is desirable to use a twisted wire of a steel material having 0.5-20mm diameter as the core material 3. The joint material is obtained by kneading a rubber raw material in which prescribed amounts of a well-known vulcanizer and a vulcanizing accelerator, etc., are blended by a Banbury mixer to afford a crude rubber and then extruding the twisted wire of the metal which is a core material together with the rubber by using an extruder in which the twisted wire is previously fed so as to extrude and cover the core material 3 with the rubber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint material which is embedded in a gap formed by panel end portions when a plurality of decorative panels are attached to an outer wall of a house, a store or the like. More specifically, it relates to prevention of shrinkage of joint material.

[0002]

2. Description of the Related Art A decorative panel is attached to an outer wall of a house or a store. A joint material is embedded in the gap of the decorative panel to ensure waterproofness of the outer wall. The gap formed by the two decorative panels to be attached is a straight line and has a substantially constant width (6 to 25 mm) in construction of a building.
Then, several kinds of standard joint materials having a cross section as shown in FIG. 2 are prepared and used according to the width of the gap. Usually, the joint material is composed of a design surface and a support portion standing upright from the design surface, and a plurality of valve bodies provided so as to extend from the support portion and contacting the end surface of the decorative panel. The valve body is positioned so as to be inclined toward the design surface, and has a structure in which the joint material is not easily removed after the joint material is inserted into the gap. The joint material has a standard length of 3 m by extrusion molding. Vulcanized rubber is used as the material, and EPDM is widely used. It is usual that the design surface 1 of the joint material is given a light color according to the color of the decorative panel, and the portion 2 embedded in the gap is black.

However, when a joint material formed of a single rubber is used, there is a disadvantage that shrinkage occurs in the length direction. In the worst case, this shrinkage reaches 10 cm for a joint material of 3 m after being embedded in the gap.

The following are considered as causes of shrinkage. (1) Molding strain due to relaxation of internal stress generated during extrusion molding. (2) Strain due to linear expansion and contraction due to changes in environmental temperature. (3) There are distortions during construction in which the joint material is embedded in the gap. Above all, the strain during the construction of (3) is
Since the joint material having a length of 3 m is held and embedded in the vertical outer wall surface, the worker is forced to work from above the outer wall surface to below the outer wall surface, and is forced to pull the joint material downward. There is a tendency, and the distortion caused by this is said. Of these three strains, the strain during construction in (3) seems to have the greatest effect.

Therefore, in order to overcome the above-mentioned problems, conventionally,
At the position of the cross-sectional supporting portion,
It has been practiced to insert the joint material over the entire length in the longitudinal direction.

Therefore, (1) it has been attempted to use a metal plate or a metal wire such as a wire or a piano wire as the core material.
However, if the joint material is bent before construction or during transportation, the bent shape is not recovered, workability is deteriorated, and the appearance is not deteriorated. In severe cases, waterproof sealing performance is also hindered. Further, when the core material is a metal plate, the metal plate does not follow the shrinkage even if the rubber material shrinks after being embedded in the gap because of its high rigidity, and the undulation in the gap is seen from the design surface. The gap width may fluctuate, and the joint material partially protrudes. further,
(2) It has been attempted to use a twisted yarn of synthetic fiber monofilament (nylon fiber, glass fiber, Kepler resin) as a core material, but each twisted yarn of synthetic fiber has a high degree of flexibility. Therefore, when a compressive force is applied from both sides in the longitudinal direction, the twist returns and shrinks while opening the fiber. Further, the elongation when the tension is applied in the longitudinal direction of the twisted yarn is large. Therefore, even when used as a core material, when tension is applied during construction, the diameter of the twisted yarn decreases and expands, and after construction, it shrinks to recover its shape when left in a standing state, following the contraction of rubber. It tended to shrink and was considered unsuitable. Therefore, no matter which material is selected as the core material, a sufficient effect cannot be obtained.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a joint material which does not shrink even after construction, overcoming the problem of selecting an optimum material as the core material.

[0008]

In order to overcome the above problems, according to the present invention as set forth in claim 1, a design surface for forming a joint and a support portion for supporting the design surface in the thickness direction of the decorative panel. A flexible resin construction joint material having a valve body that is inclined from the design surface and extends from the support portion and comes into contact with and comes into close contact with a decorative panel end portion, and the joint material is provided over the entire length in the longitudinal direction of the joint material. Provided is a joint material for construction, characterized in that a stranded metal wire is embedded in a supporting portion as a core material.

The kind of metal as the core material is not particularly limited, but may be a steel material which is generally used. Further, if the resin to be coated is also flexible, it can be used without limitation. The resin with which the core material is coated can be used without limitation as long as it is a flexible resin. However, the vulcanized rubber E used as a joint material made of conventional resin alone can be used.
PDM is suitable. The production can be performed by inserting a core material into the die of an extrusion molding machine and performing extrusion coating.
Further, as described in claim 2, a jointing material for construction using a twisted wire made of steel having a diameter of a twisted yarn as a core material of 0.5 to 20 mm is preferable. Stranded single yarn has a diameter of 0.1
It is characterized in that it is 0.3 mm and is twisted to form a stranded wire.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. A rubber raw material containing a known amount of a vulcanizing agent, a vulcanization accelerator and the like is kneaded with a Banbury mixer to obtain raw rubber, which is then molded with an extruder to obtain a joint material. A metal strand, which is the core material, is fed into the extruder in advance and extruded together with the rubber, whereby the core material is extruded and covered with the rubber.
Extruded joint material is vulcanized after being extruded for a predetermined length.
Cut and soak in water cooling tank to prevent deformation and uneven thickness.

As the core material, product number 1 × 4 × 0.25 manufactured by Tokyo Steel Co., Ltd. Steel Cord Co., Ltd. was used. The core material is a bundle of four metal wires having a diameter of 0.25 mm. The number of cores to be inserted is not limited to one, but two or three cores may be inserted in parallel with a plurality of support parts.

[0012]

EFFECT OF THE INVENTION Since the metal strand is used as the core material, the joint material does not shrink after the construction. Also, the core material is a metal plate,
Flexibility is not impaired as compared with the case of using a metal wire such as wire or piano wire, so there is no problem even if the joint material is slightly bent during transportation. Furthermore, the twisting of the synthetic fiber resin eliminates the untwisting that occurred during the work. Therefore, the joint material is difficult to expand even during the work of filling in the gap of the outer wall panel, and does not shrink even if left after being embedded.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a joint material in which a core material is embedded.

FIG. 2 is a cross-sectional view of a joint material molded from a single rubber body.

[Explanation of symbols]

 1 Design surface 2 Main body embedded in joint 3 Core material

Claims (2)

[Claims] 1. A resin-made construction joint material having a design surface, a support portion for supporting the design surface, and a valve element extending from the support portion, wherein a metal is used for the joint material support portion over the entire length in the longitudinal direction of the joint material. A joint material for construction, which is constructed by embedding a stranded wire as a core material. 2. The core material according to claim 1, wherein the diameter of the core material is 0.5 to
A joint material for construction that uses a stranded steel wire that is 20 mm.