JP2002309757A - Edge joist structure and edge joist fixing adhesive sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound insulating edge joist structure and edge joist fixing double-faced adhesive sheet having excellent sound insulating property, never causing the vertical displacement of a floor material or a vibration propagation or skeleton damage by nailing, and facilitating a construction such as positioning, removal or the like. SOLUTION: In this edge joist structure and edge joist fixing adhesive sheet, the edge joist fixing adhesive sheet 4 having an adhesive layer formed on at least one side (preferably, both sides) of a base material formed of a resin foamed body (preferably, olefinic resin foamed body) is laminated between the edge joist material 3 and wall material 2 of a double floor structure comprising the edge joist material 3 arranged on a floor foundation 1 along the wall material 2 raised from the floor foundation 1 and a floor material 5 laid thereon. The adhesive sheet 4 is preferably laminated so that a non-adhesive or slightly adhesive masking member partially covers the adhesive layer surface of the wall material 2 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joist structure and a double-sided pressure-sensitive adhesive sheet for fixing joist, and more particularly to the field of housing and building materials, in particular, in apartment buildings, walking on floor materials with slippers or objects on floor materials. The life noise that occurs when you drop
The present invention relates to a soundproof joist structure and an adhesive sheet for fixing joist that are suitable for preventing propagation to an adjacent room or downstairs. The pressure-sensitive adhesive sheet for fixing a joist of the present invention also includes an adhesive tape for fixing a joist.

[0002]

2. Description of the Related Art Conventionally, in an apartment house such as a public housing complex, a wall material is erected from a floor base such as a concrete slab, and a joist material is disposed on the floor base in a state of being in close contact with the wall material. At this time, a double floor structure in which a floor material is laid on a joist material is generally used. However, in the double floor structure, since the joists are usually fixed to the wall material by nailing, there is a problem that the living vibration is propagated through the nails as the fixing material, and the soundproof performance cannot be secured. there were.

Further, when the wall material is concrete, the nailing requires a great deal of labor and damages the concrete frame, so that cracks and the like are likely to be generated from the nail holes, and the frame strength may be reduced. In addition, when removing joists for indoor renewal work or the like, the work was very difficult.

Japanese Patent Application Laid-Open No. 9-177289 discloses a joist structure in which a floor material constructed at a predetermined height from a floor base such as a concrete slab is supported by a wall. Or, when a cushioning material is provided between a joist material and a wall material, a joist structure is proposed, and a structure is disclosed in which the living noise is absorbed by the cushioning material and the propagation of the living noise to an adjacent room or downstairs is blocked. Have been. The cushioning material used in the above joist structure is a fiberboard such as glass wool, a nonwoven fabric, a three-dimensional net, and the like, and these cushioning materials absorb living noises by an air layer contained therein, and move to the next room or downstairs. The purpose of this study is to block the propagation of domestic noise.

However, in the structure using the cushioning material as described above, if the air volume of the cushioning material is increased to increase the soundproofing performance, the apparent density of the cushioning material is reduced and the rigidity is reduced. However, there has been a problem that the floor material is tilted due to the settling of the cushioning material, or the floor material is displaced in the vertical direction during walking to generate floor noise. Therefore, in order to prevent floor noises, a method of providing a height-adjustable support rod or the like has been used, but a sufficient adjustment function has not always been obtained.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional double floor structure, an object of the present invention is to provide an excellent soundproofing property and to prevent the floor material from being displaced in the vertical direction and to achieve positioning and positioning. An object of the present invention is to provide a joist structure and an adhesive sheet for fixing joist that are easy to remove and perform.

[0007]

[Means for Solving the Problems]

[Claims] The joist structure according to claim 1, wherein the joist material is disposed on the floor base along the wall material erected from the floor base, and at this time, the floor material is placed on the joist material. In the laid double floor structure, the adhesive sheet for fixing the joist is provided between the joist material and the wall material, in which the adhesive layer is formed on at least one surface of the base material made of the resin foam. It is characterized by the following. The joist structure according to claim 2 is the joist structure according to claim 1, wherein the adhesive sheet for fixing joist is used for fixing joist when an adhesive layer is formed on both surfaces of a substrate made of a resin foam. It is a double-sided pressure-sensitive adhesive sheet.

The joist structure according to claim 3 is the joist structure according to claim 1 or 2, wherein the resin foam is a polyolefin resin foam. Claim 4
The joist structure described is the joist structure according to any one of claims 1 to 3, wherein the adhesive sheet for fixing joist is a non-adhesive or slightly adhesive masking member, and at least one adhesive. It is characterized by being laminated so as to partially cover the layer surface. The pressure-sensitive adhesive sheet for fixing a joist according to claim 5 is used for the joist structure according to any one of claims 1 to 4.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings showing an example of a joist structure. As shown in FIG. 1, the joist structure according to the present invention has a fixed structure on the floor base 1 with respect to a wall material 2 such as a concrete slab, which stands vertically upward from the outer peripheral edge of the floor base 1. A joist 3 is disposed so as to be at a height and keep a constant distance from the wall 2. At this time, the lower surface of the end of the floor 5 is supported and fixed to the upper end surface of the joist 3. In the double floor structure thus formed, an adhesive sheet 4 for fixing the joist is arranged between the joist 3 and the wall 2.

Although not an essential requirement in the joist structure of the present invention, a slight gap 7 is usually formed between the opposing surfaces of the floor member 5 and the wall member 2. Lower surface and floor base 1 excluding the part supported by the joist 3
Usually, for example, a conventionally known damping rubber 8 or the like is provided between the opposing surfaces, and support members 9 which can be expanded and contracted as necessary are arranged at predetermined intervals.

As shown in FIG. 1, a bundle 6 may be inserted between the joist 3 and the floor base 1, and the joist 3 can be adjusted to a certain height. The support member 9 may be provided. In addition, in the above-mentioned joist structure, in the case of unevenness of the wall material 2 surface or poor dimensional accuracy of the joist material 3, etc., unless the effects of the present invention are impaired, the joist material 3 and the wall material 2 are connected. The nailing may be partially performed only in the portion where the adhesion is difficult. Further, a floor finishing material (not shown) made of a flooring, a particle board, or the like is laminated on the floor material as necessary.

The double-sided pressure-sensitive adhesive sheet 4 for fixing a joist according to the present invention has a pressure-sensitive adhesive layer formed on at least one surface of a substrate, and the resin foam which is a constituent material of the substrate includes polyolefin resin, urethane resin, acrylic resin, and the like. Foams such as resins, or foams such as neoprene rubber-based, butyl rubber-based viscoelastic bodies and the like may be used, and these may be used alone or as a laminate of two or more kinds. Is also good.

It is more preferable that the resin foam as the base material has a 25% compressive strength of 9.8 N / cm ² or less and a foaming ratio of 10 times or more from the viewpoint of soundproofing performance against daily life noise.
The thickness of the resin foam is not particularly limited, but is preferably 1 to 10 mm from the viewpoint of excellent followability to the wall material surface. In particular, a polyolefin resin-based foam is excellent in terms of overall durability and cost in addition to the above, and is preferably used. As a commercially available product of such a polyolefin resin-based foam, “Softlon” manufactured by Sekisui Chemical Co., Ltd. is exemplified.

The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not particularly limited. Examples of the pressure-sensitive adhesive include an organic solvent-based pressure-sensitive adhesive containing an acrylic, natural rubber, synthetic rubber, and silicone-based pressure-sensitive polymer as a main component, and EVA. An emulsion-based pressure-sensitive adhesive or the like as a main component can be used. Among them, it is preferable to use an acrylic pressure-sensitive adhesive which has excellent durability and causes less stains during handling. Further, in consideration of the rough surface adhesiveness and the workability of application in cold weather, the glass transition temperature (Tg) of the adhesive is preferably 5 ° C. or less, and the thickness of the adhesive is preferably 50 to 100 μm. . When the sheet 4 is a double-sided pressure-sensitive adhesive sheet 41 for fixing a joist when the pressure-sensitive adhesive layers are provided on both surfaces of a substrate made of a resin foam,
This is preferable in that the fixing to the wall member 4 and the edge joist member 3 is assured, and the soundproofing property is assuredly developed.

The joist fixing adhesive sheet 4 is formed by laminating a non-adhesive or slightly adhesive masking member on at least one of the adhesive layer surfaces so as to partially cover the adhesive layer surface. Is more preferable in terms of workability. This masking member can exert a so-called alignment function by preventing the adhesive layer from initially adhering to the base material such as the wall material 2 and becoming difficult to separate and realign. . This will be described in more detail below with reference to FIG.

FIG. 2 shows a substrate 20, adhesive layers 21 and 22, and a masking member 23.
FIG. 3 is a schematic cross-sectional view illustrating a double-sided pressure-sensitive adhesive sheet 4 for fixing joists when is partially laminated on the surface of the pressure-sensitive adhesive layer 22 on the wall material side. In this case, the wall material side is the positioning side.

As illustrated in FIG. 2, the masking member 2
3 is preferably laminated so as to protrude from the surface of the adhesive layer 22. The coverage (the ratio of the area where the masking member covers the pressure-sensitive adhesive layer) is preferably 13% to 50% with respect to the area of the pressure-sensitive adhesive layer 22. 13 coverage
%, A sufficient alignment function cannot be performed, and the surface of the adhesive layer 22 easily comes into contact with the adherend with a small pressing force. Conversely, if it exceeds 50%, the adhesive layer The surface area of the surface 22 that can be in contact with the adherend is insufficient, and a sufficient adhesive fixing force cannot be obtained, so that the durability tends to be impaired.

The thickness of the masking member 23 is 30 to 550.
μm is preferred. When the thickness is less than 30 μm, the masking member 23 is buried in the adhesive layer 22 with a small pressure, and it is difficult to perform a sufficient alignment function.
When the thickness exceeds μm, even if an attempt is made to perform pressure bonding with a large pressure, the masking member 23 is unlikely to be buried in the adhesive layer 22,
Sufficient adhesive fixing power cannot be obtained.

As a material of the masking member 23,
As the non-adhesive member, for example, a net, a net, a warif, a woven fabric, a nonwoven fabric, or the like can be used which is made of a natural or synthetic metal fiber or the like. Further, as the slightly tacky member, for example, a material obtained by applying a slightly tacky adhesive to the surface of the non-sticky member can be used. As the slightly tacky adhesive, an adhesive used for a surface protection sheet or the like is suitably used, and examples thereof include a rubber-based adhesive, an acrylic-based adhesive, and an ethylene-vinyl acetate copolymer (EVA) -based adhesive. Is mentioned. In addition, acrylic microsphere-shaped pressure-sensitive adhesives, polyoxypropylene-based pressure-sensitive adhesives, and the like can also be suitably used as other special removable adhesives.

As shown in FIG. 2, the masking member 23
However, when it is laminated on the surface of the adhesive layer 22 on the wall material side, it is easy to peel off the joist material from the wall material surface in the case of renewal work or the like, which is preferable. In this case, it is more preferable that the tear strength of the masking member 23 and the yarn yarn intersection point (intersection point of the yarn yarn which is a constituent element such as a mesh or a nonwoven fabric used as a material) are appropriately adjusted and optimized. .

Specifically, the tear strength is 4.9 N / 50 m to prevent the masking member 23 from collapsing at the time of re-peeling.
m or more. Tear strength is 4.9N / 5
If the thickness is less than 0 mm, the configuration of the masking member 23 may be broken, and the masking member 23 may remain on a base material such as a wall material due to breakage or material breakage. Further, it is preferable that the yarn yarn intersecting point interval is 3 to 6 mm. If the distance is too small, the adhesive fixing force of the adhesive layer 22 is hindered. If the distance is too wide, the base material 20 is broken and the sheet is broken, or the base material 20 remains on the wall material in the form of dots. Because there is.

In the present invention, release paper is adhered to the adhesive layer or the masking member layer of the joist fixing adhesive sheet, if necessary, for the convenience of construction. As the release paper, those conventionally used as release papers for pressure-sensitive adhesive sheets can be appropriately used.For example, kraft paper, semi-bleached paper, woodfree paper, paper-based paper such as glassine paper, or polyethylene or Examples thereof include those obtained by using a synthetic resin such as polyester as a base material and treating the surface layer with a silicone release agent. For paper-based materials, the basis weight is 50 to 15 in that the tear resistance and the followability to the adhesive layer are well balanced.
What is 0 g / m < ² > is preferable. The thickness of the release paper is preferably from 70 to 150 μm in consideration of the pickup property.

(Function) In the joist structure of the present invention, the floor material is
Since it is supported by the joist material and the adhesive sheet is disposed between the joist material and the wall material surface, there is no vertical displacement and no floor noise occurs. In addition, the nailing of the wall material becomes unnecessary, or the adhesive sheet provided with the base material made of a resin foam can be used, so that the nailing interval can be increased as compared with the related art, and the living vibration through nails or the like can be reduced. Propagation can be reduced, and cracking of the wall material and reduction in strength due to nailing can be prevented. In addition, when the pressure-sensitive adhesive sheet is a double-sided pressure-sensitive adhesive sheet, pressure-sensitive adhesive to wall materials and joists,
And the soundproofing expression is ensured. Furthermore, when the base material of the double-sided pressure-sensitive adhesive sheet is a polyolefin resin foam,
A favorable joist structure can be obtained from a comprehensive viewpoint such as durability and price. Further, the masking member is laminated so as to partially cover at least one adhesive layer surface,
Since the initial adhesion to the wall material or the like is prevented, the workability such as alignment is excellent. Since the double-sided pressure-sensitive adhesive sheet for joist of the present invention is used for the above joist structure, it can contribute to excellent soundproofing and workability. Incidentally, in the present invention, the adhesive sheet for fixing the joist, by adhesively fixing the joist material to the wall material by the adhesive layer formed on both sides, or the wall material by the adhesive layer formed on one side, depending on the case The sound-proof property is exhibited by disposing the base material that is adhesively fixed to the joist material in a state of elastic recovery on the joist material or wall material side.

[0024]

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples. The present invention is not limited only to the following examples. <Materials used> Double-sided pressure-sensitive adhesive sheet A for joist A double-sided pressure-sensitive adhesive sheet having the following configuration was produced. (1) Foam substrate: Sekisui Chemical Co., Ltd. polyolefin resin-based foam (trade name “Softlon # 1001”, thickness 1.0 mm, foaming ratio 10 times). (2) Adhesive: 1 part by weight of Nippon Polyurethane Co., Ltd. product name "Coronate L45" is added as a curing agent to an acrylic pressure-sensitive adhesive (product name "SK Dine 801B") manufactured by Soken Chemical Co., Ltd. to make a thickness of 70 [mu] m. Was coated on both sides of the substrate. (3) Release paper: “WHT8” manufactured by San-A Chemical Co., Ltd.
0 ", 100 μm thick, double-sided release paper. The double-sided pressure-sensitive adhesive sheet for joist was used by laminating the release paper and laminating it in four layers.

2. Double-sided PSA sheet B for joist A double-sided PSA sheet for joist having the following structure was produced. (1) Resin base material: polyethylene resin plate (1.0 m thick)
m). (2) Adhesive: The same as the double-sided pressure-sensitive adhesive sheet A for joist described above. (3) Release paper: The same as that for the double-sided pressure-sensitive adhesive sheet A for joists described above. The double-sided pressure-sensitive adhesive sheet for joist was used by laminating the release paper and laminating it in four layers.

(Example 1) As shown in FIG. 1, the double-sided pressure-sensitive adhesive sheet A (double-sided pressure-sensitive adhesive sheet 41) was attached to the side-side 31 of the large joist, and the joist 3 (square, width 30)
mm × height 40 mm), and while the position to be fixed to the concrete wall material 2 erected from the floor base 1 is marked out, the joist 3 is laterally pressed against the wall material 2 and adhesively fixed. It was nailed and fixed at 2 m. Thereafter, a bundle 6 (30 mm × 30 mm) is inserted between the joist 3 and the rough surface (floor base) 1, and the joist between the joist 3 and the wall 2 in the double floor structure. When the double-sided pressure-sensitive adhesive sheet 41 was provided, a joist structure was produced. The floor material 5 (particle board, thickness 20 mm × 910 mm × 1820 m) is placed on the joist material.
m) was laid with screws. Between the lower surface of the floor material 5 except for the portion supported by the joist 3 and the opposing surface of the floor base 1, support rods 9 provided with vibration damping rubbers 8 are arranged at intervals of 450 mm. Material 5 was supported. In addition, a flooring (not shown, having a thickness of 12 mm × 303 mm × 181) is provided on the floor material 5.
8 mm).

(Example 2) Double-sided pressure-sensitive adhesive sheet 41 for joist
Except that a double-sided pressure-sensitive adhesive sheet A was used in which a masking member (manufactured by Nisseki Sheet Pallet System Co., Ltd., trade name “ON5340”, thickness 500 μm, coverage 16%) 23 was laminated on the wall material side. An edge joist structure was produced in the same manner as in Example 1. (Comparative Example 1) A joist structure was produced in the same manner as in Example 1 except that the double-sided pressure-sensitive adhesive sheet B for joist was used as the double-sided pressure-sensitive adhesive sheet 41 for joist. (Comparative Example 2) In the same manner as in Example 1 except that the nail joist 3 was fixed between the joist 3 and the wall 2 without using the double-sided adhesive sheet 41 for nail joist and the nailing pitch was set to 450 mm. An edge joist structure was produced.

<Evaluation of Performance> The joist structure obtained above was constructed in a two-story reinforced concrete (RC) experimental building having a hitting room on the second floor and a sound receiving room directly below the hitting room. Was evaluated. Floor base 1 in the experimental building
Was 150 mm in thickness. (1) Soundproofing In the center of the flooring surface fixed to the floor material 5, JI
A light floor impact sound generator stipulated in SA1418 was installed and a blow was applied, and noise data was measured with a microphone installed in a sound receiving room immediately below. Among the obtained noise data, the improvement amount (dB) at 250 Hz and the improvement amount (dB) at all passes which affect the lightweight floor impact sound were calculated based on Comparative Example 2 which is the current method. The evaluation was based on the following criteria. ：: Good soundproofing ×: Poor soundproofing (2) Removability After the soundproofing measurement, the peeling state when the joist material was removed was visually evaluated according to the following criteria. ：: good peelability ×: poor peelability

[0029]

[Table 1] As is clear from Table 1, in Examples of the present invention,
It has been found that both 250 Hz and all-pass have excellent soundproofing properties and good removability.

[0030]

According to the present invention, the joist structure has excellent soundproofing because the adhesive sheet for fixing joist is provided between the joist material and the wall material and has a base made of a resin foam. In addition to having noise, it does not make noise on the floor, reduces the soundproofing performance due to nailing, reduces damage to the frame, and simplifies future renewal work. Moreover, when the pressure-sensitive adhesive sheet for fixing the joist is a double-sided pressure-sensitive adhesive sheet, the above-mentioned effect is further ensured. Further, when the adhesive sheet for fixing the joist of the present invention is a non-adhesive or slightly adhesive masking member that is laminated so as to partially cover at least one adhesive layer surface, At the same time, positioning can be easily performed, and the joist can be easily separated from the wall surface during renewal work or the like, thereby simplifying the work.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of a joist structure according to the present invention.

FIG. 2 is a schematic cross-sectional view showing an example of a pressure-sensitive adhesive sheet for fixing joists according to the present invention.

[Explanation of symbols]

 1. Floor base 2. Wall material 3. Edge joist 31. Side joist side 4. Adhesive sheet for edge joist 41. 4. Double-sided adhesive sheet for joist Floor material 6. Bundle material 7. Gap 8. 8. Damping rubber Support rod 20. Substrate 21. 21. Adhesive layer (side of joist material) Adhesive layer (wall material side) 23. Masking material

Claims (5)

[Claims] 1. A double floor structure in which a joist is arranged on a floor base along a wall material erected from the floor base, and the floor material is laid on the joist. When the adhesive layer is formed on at least one side of the base material made of the resin foam between the joist material and the wall material, the adhesive sheet for fixing the joist is provided. 2. The double-sided pressure-sensitive adhesive sheet according to claim 1, wherein the double-sided pressure-sensitive adhesive sheet is a double-sided pressure-sensitive adhesive sheet in which pressure-sensitive adhesive layers are formed on both sides of a substrate made of a resin foam. Construction. 3. The joist structure according to claim 1, wherein the resin foam is a polyolefin resin foam. 4. The pressure-sensitive adhesive sheet for fixing a joist, wherein a non-adhesive or slightly adhesive masking member is laminated so as to partially cover at least one adhesive layer surface. Item 4. The joist structure according to any one of Items 1 to 3. 5. An adhesive sheet for fixing a joist that is used in the joist structure according to claim 1.