JP2771116B2 - Screw for fixing the seal of the sash frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof screw for fixing a sash frame made of aluminum or the like to a structure such as concrete by using a screw.

[0002]

2. Description of the Related Art When water adheres to a screw fastening portion after fixing a part or the like with a screw, the water permeates along the clearance of the screw portion, and eventually penetrates to a deep portion. For this reason, a technique for preventing water intrusion by forming a resin film on the screw portion of the screw to eliminate the clearance is already known.

For example, Japanese Patent Application Laid-Open No. 4-17 / 1991 discloses a technique of forming a resin film of a foam on nails or screws to enhance the sealing effect.
1308. Japanese Patent Application Laid-Open No. 61-167711 discloses a technique in which a thermoplastic resin is applied to a screw portion of a bolt and then heated to a melting temperature to form a fused resin film.
Is disclosed.

[0004] A film of an adhesive composition in which at least one component of an adhesive material whose two components undergo a curing reaction upon contact is encapsulated in a microcapsule is formed on a screw portion, and the microcapsule is crushed at the time of screwing in the screw. Japanese Patent Application Laid-Open No. HEI 2-17341 discloses a technique of reacting and curing an adhesive to fix a seal.
0, JP-A-3-199706, JP-A-4-8905, and JP-A-5-302613.

[0005]

When a sash frame is fixed to a building such as concrete, bolts, screws,
It is necessary to screw in a screw fastener such as a flat screw until the top surface of the screw head is at the same level as the surface of the sash frame. The periphery of the sash frame is sealed with caulking material to prevent water such as rainwater and dew from entering.However, a resin film should be formed on the screw part of the screw to prevent water from permeating from the screw fastening part. Is preferred.

However, in the above-described technique for forming a resin film on the screw portion of the screw to enhance the sealing and fixing effects, the frictional force at the time of screwing is large, and the tightening torque loss and the resistance are large. . Therefore, it is difficult to screw the above screw to a predetermined depth, and it is difficult to make the top surface of the screw head and the surface of the sash frame at the same level.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a screw for fixing a seal of a sash frame which can be easily screwed to a predetermined depth and which can be completely waterproofed and can be prevented from being loosened. .

[0008]

In order to solve the above-mentioned problems, a screw for fixing a sash frame 4 such as a window to a structure 5 made of concrete or the like includes a microcapsule containing an organic solvent and an organic solvent. A dry film 3 of a sealing material 2 made of a resin composition or a rubber composition that dissolves is formed on a screw portion 1c of a screw 1.

Further, the dry film 3 of the sealing material 2 is formed on the screw portion 1c of the screw 1 and the seat surface portion 1a.

[0010]

The microcapsules constituting the sealing material 2 are crushed, and the organic solvent contained in the capsules oozes out. The organic solvent dissolves a part of the resin composition or the rubber composition, which is a component of the sealing material 2, and acts to soften the dry film 3 of the sealing material 2.

As a result, the screw 1 of the present invention has a reduced loss torque and resistance during tightening, and can be easily tightened until the surface of the sash frame 4 and the top surface 1b of the screw 1 are at the same level. become.

The screw portion 1c of the screw 1 and the sash frame 4
Since the sealing material 2 is filled in the screw holes and the clearance with the concrete structure 5, the infiltration and penetration of water from the screw fastening portion are prevented.

[0013]

1 is a side view of a screw according to the present invention, and FIG. 2 is a longitudinal sectional view. The screw 1 is composed of a top surface 1b, a seat surface 1a, and a screw portion 1c of the upper surface of the head. A sealing material 2 comprising a capsule and a resin composition or a rubber composition dissolved in an organic solvent is applied to form a dry film 3.

FIG. 3 is a longitudinal sectional view of a portion where a sash frame is fixed by using the screw of the present invention, 5 is a concrete structure,
Reference numeral 4 denotes a sash frame. When the screw 1 is tightened, the microcapsules of the dry film 3 of the sealing material 2 are crushed, the organic solvent contained therein is leached, and the resin composition or the rubber composition is partially dissolved and softened. This is a state in which the space between the sash frame 4 and the concrete structure 5 and the screw 1 is filled with such a resin composition or rubber composition. In this case, the organic solvent contained in the microcapsules gradually evaporates into the solidified film 6 in the dried film 3, and also acts to prevent the screw 1 from loosening.

The organic solvent contained in the above-mentioned microcapsules is a liquid organic substance which dissolves the resin composition and the rubber composition and which volatilizes even at room temperature.

Examples of the aliphatic hydrocarbon-based organic solvent include hexane, heptane, octane, cycloheptane, cyclohexane, methylcyclohexane, ethylcyclohexane, hexene, heptene, octene, nonene, cyclohexene, pinene, dipentene and the like.

Examples of the aromatic hydrocarbon organic solvent include benzene, toluene, xylene, cumene, naphthalene, butylbenzene, mesitylene and the like.

Examples of the organic solvent for the halogenated hydrocarbon include:
Examples include methyl chloride, chloroform, carbon tetrachloride, dichloroethane, trichloroethane, tetrachloroethane, allyl chloride, isobutyl chloride, chlorobenzene, dichlorobenzene, chloronaphthalene, propyl bromide, isopropyl bromide, and dibromobenzene.

Examples of the ester type organic solvent include ethyl acetate, butyl acetate, methyl propionate, ethyl isobutyrate, diethyl carbonate, borate ester, and phosphate ester.

In order to encapsulate the above organic solvent in microcapsules, an interfacial polymerization method, a coacervation method, an IN-
It can be produced by a known technique such as a SITU polymerization method. In addition, as materials for the wall material of the microcapsules, gelatin, gum arabic, sodium alginate, sodium polyacrylate,
Polyvinyl alcohol, polyacrylamide, sodium carboxymethyl cellulose, polyether, polyamide, polyurea, epoxy resin, polyurethane, polystyrene and the like can be used.

The particle size of the microcapsule is not particularly limited as long as it is such a size that the microcapsule can be effectively broken when tightened according to the size and shape of the thread portion 1c of the screw 1. For example, it is 0.005 to 0.5 mm, preferably 0.01 to 0.3 mm.

The resin composition or the rubber composition, which is one of the components constituting the sealing material 2 of the present invention, is a polymer compound which can be dissolved in the above-mentioned organic solvent encapsulated in the microcapsules.

The above resin composition includes thermoplastic resins such as polyvinyl acetate, polyethylene acetate, polystyrene, polyacrylate, polypropylene, polyamide, polyurethane, and the like; styrene-ethylene-butylenestyrene (SEBS) copolymer; It is a composition comprising a thermoplastic copolymer resin such as an acrylic copolymer, a filler such as silica powder, calcium carbonate, carbon black, talc, and aluminum oxide, an antioxidant, and a plasticizer.

The rubber composition includes natural rubber, styrene rubber (SBR), butylene rubber, butadiene rubber, isoprene rubber, acrylic rubber, nitrile rubber (NBR),
A composition comprising an unvulcanized rubber such as a polysulfide polyethylene rubber and the above-mentioned filler, antioxidant, plasticizer and the like.

The screw for fixing a sash frame of the present invention is obtained by dispersing or dissolving a microcapsule containing an organic solvent and a sealing material 2 made of a resin composition or a rubber composition in a solvent to form a liquid, and 1c or the screw portion 1c and the seat surface portion 1a, and air-dried to form a dry film 3.

Next, a method for producing microcapsules containing toluene will be described. 100 g of a 10% aqueous gelatin solution and a small amount of an emulsifier were added to and mixed with toluene to prepare an emulsion of toluene. Next, 100 g of an aqueous solution of gum arabic having a concentration of 10% was added, and the mixture was stirred while being heated to 40 ° C., and an aqueous solution of acetic acid having a concentration of 10% was added dropwise to adjust the pH of the solution to an acidic solution of around 4, And 5 ° C
Stirring was continued while cooling.

Next, a 30% formalin aqueous solution was added to 3
After the addition of g, a 10% aqueous sodium hydroxide solution was added dropwise to adjust the pH of the aqueous solution to an alkaline solution of around 10, and then toluene was included while gradually heating and stirring until the temperature reached 50 ° C. Then, microcapsules having an average particle size of 0.04 mm using gelatin-gum arabic as a wall material were produced.

EXPERIMENTAL EXAMPLE 1 A rubber composition containing chlorosulfonated polyethylene rubber, talc, xylene and the like as main components (trade name: Three Bond 1)
104, manufactured by Three Bond Co., Ltd.) Sealing material 2 was manufactured using 30 parts by weight of microcapsules containing toluene and 10 parts by weight of xylene in 100 parts by weight. This sealing material 2 was coated with M6 using an application device disclosed in Japanese Utility Model Laid-Open No. 57-128380.
It was applied to the screw portion 1c of a tapping screw with a flat head of × 0.75 and air-dried to form a dry film 3 having a thickness of 0.1 mm.

Experimental Example 2 25 parts by weight of microcapsules containing toluene in 100 parts by weight of a resin composition (trade name: Three Bond 1201, manufactured by Three Bond Co., Ltd.) containing silicone resin, calcium carbonate, and toluene, and xylene 10 The sealing material 2 was manufactured in parts by weight. M6 in the same manner as in Experimental Example 1 described above.
Coating on the screw part 1c of the x 0.75 flat head tapping screw and the seat surface 1a of the flat head and air-drying, the film thickness is 0.1mm
A dried film 3 was formed.

Comparative Example 1 Only the rubber composition used in Experimental Example 1 was prepared in the same manner as in Example 1.
A 0.1 mm-thick film of the rubber composition was formed on the threaded portion 1c of the 6 × 0.75 flat head tapping screw.

Comparative Example 2 Only the resin composition used in Experimental Example 2 was prepared in the same manner.
A rubber composition having a thickness of 0.1 mm was formed on the thread portion 1c of the 6 × 0.75 flat head tapping screw and the seat surface 1a of the flat head.

Comparative Tests Experimental examples 1 and 2 and comparative examples 1 and 2 were mounted on an aluminum block plate (sash frame 4) having a countersunk hole in which a head of a flat screw was fitted with a screw hole having a diameter of 6 mm and a pitch of 0.75 mm. Were tightened until the top surface 1b of the flat head and the surface of the aluminum block plate 4 were at the same level, and the torque at that time was measured. Table 1 shows the average torque results for the 10 screws.
Shown in

[0033]

[Table 1]

[0034]

As described above, when the screw is tightened with a small torque, the top surface 1b of the screw becomes the same level as the surface of the sash frame 4, the aesthetic appearance of the sash after installation is excellent, and water permeates from the fastening portion. And it is easy to fix the sash frame 4 to the building.

After the screw is tightened, the organic solvent contained in the microcapsules leaches into the resin composition or the rubber composition to soften them, but gradually evaporates and becomes a solidified film of the resin composition or the rubber composition. 6, which has the effect of preventing the screws from loosening.

[Brief description of the drawings]

FIG. 1 is a side view of a screw of the present invention.

FIG. 2 is a longitudinal sectional view of the same.

FIG. 3 is a longitudinal sectional view of a portion to which a sash frame is fixed using the screw of the present invention.

[Description of Signs] 1 Screw 1a Seat 1b Top 1c Screw 2 Seal material 3 Dry film 4 Sash frame 5 Concrete structure 6 Solidified film

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-295339 (JP, A) JP-A-5-302613 (JP, A) JP-A-58-125772 (JP, A) JP-A-63-1988 312506 (JP, A) JP-A-5-321920 (JP, A) JP-A-6-66308 (JP, A) JP-A-4-145209 (JP, A) JP-A-4-507451 (JP, A) JP-A-5-186760 (JP, A) U.S. Pat. No. 3,247,752 (US, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16B 39/22 C09J 11/00

Claims (2)

(57) [Claims] 1. A screw for fixing a sash frame such as a window to a structure such as concrete, wherein the sealing material comprises a microcapsule containing an organic solvent and a resin composition or a rubber composition dissolved in the organic solvent. A screw for fixing a seal of a sash frame, characterized in that a dry film is formed on a screw portion of the screw. 2. A screw for fixing a seal of a sash frame, wherein a dry film of a sealing material is formed on the screw for fixing the seal of the sash frame on a screw portion and a seat surface of the screw.