JP4312769B2 - Floor structure, viscoelastic body used for floor structure, and construction method of floor structure - Google Patents

Description

  The present invention relates to a floor structure composed of a beam, a viscoelastic body, and a floor frame, and more particularly to a viscoelastic body capable of exhibiting three functions of vibration insulation, low friction resistance, and adhesiveness. The present invention relates to a technique in which a viscoelastic body is used for compression fixation in a state where its performance is sufficiently exerted, and it is difficult to transmit vibration received by a floor frame to a beam.

Conventionally, for the connection between a beam and a floor structure, for a plate material such as an ALC floor slab, a strip of rubber is used in which the short side of the floor slab is linear with respect to the long side of the beam. When viewed in a cross section perpendicular to the long side direction, rubber having a mountain valley and having different mountain heights were used (see, for example, Patent Document 1).
JP 2005-016103 A

  However, when the present inventor examined, when installing the floor slab, it is easy to adjust the position in the direction parallel to the long side of the beam, but it is difficult to move in the direction orthogonal to the long side of the beam and undergoes shear deformation. Therefore, it was easy to restore to the original position, and when it was not restored, it was used as it was subjected to shear deformation, and it was found that the original vibration insulation ability could not be exhibited.

  On the other hand, in floor structures such as floor panels with joists, there were times when foamed sheets such as polyethylene foamed several tens of times were used, but the foamed cells were immediately crushed by the floor load, and the anti-vibration effect could be demonstrated There was no situation.

  In recent years, the floor impact sound has also been sufficiently considered, and a device that does not transmit the vibration of the floor structure to the beam is required, and the present inventors have obtained the knowledge that flexible and low repulsion rubber is effective in reducing floor impact sound. ing. Furthermore, it has been found that the provision of dots in the form of dots rather than linear lines on a conventional beam is more effective in reducing floor impact noise because the response of impact relaxation deformation can be sufficiently taken.

Accordingly, an object of the present invention is to obtain a floor structure in which shear deformation is not left with respect to the viscoelastic body and the vibration insulation ability of the viscoelastic body is sufficiently utilized when positioning the floor frame.
Further, the problems to be solved by the present invention include the following.
(1) When the floor frame is placed and fixed, a load greater than the shared load acts on at least the viscoelastic body that supports the weight of the floor frame, and as a result, the viscoelastic body is compressed and fixed. One of the challenges is to obtain a viscoelastic body that is flexible and exhibits low rebound resilience in order to perform buffer deformation quickly when a floor impact is applied and to sufficiently restrain the impact reaction force.
(2) An oil-adhesive interview where the viscoelastic body can be adhered by simple wiping even if oil such as cutting oil or rust preventive oil adheres to the adhesive-fixing part at the bottom of the floor structure. One of the challenges is to make it wearable.
(3) The beam of the viscoelastic body is designed so that the fine adjustment of the position of the floor frame on the beam is easy and the shear deformation of the viscoelastic body does not easily occur, and accordingly the restoration to the position before the fine adjustment does not occur. One of the problems is to reduce the frictional resistance of the contact surface.

The present invention relates to a pair of beams, a floor frame horizontally mounted between the beams, a fixing member that fixes the beam to the floor frame, and a vibration insulating viscoelastic body that is compressed and fixed between the beam and the floor frame. The viscoelastic body is mounted on a contact portion with one or both of the beam and the floor frame in a state where the floor frame is not fixed to the beam by a fixing member. A low frictional resistance layer that enables horizontal movement of the viscoelastic body with respect to the contact surface of the beam or horizontal movement of the floor frame with respect to the contact surface of the viscoelastic body in a placed state And a viscoelastic body used in the floor structure.
In addition, the present invention provides a pair of beams, a floor frame placed horizontally between the beams, a fixing member for fixing the beam to the floor frame, and a vibration insulating adhesive that is compressed and fixed between the beam and the floor frame. In constructing a floor structure comprising an elastic body, (a) a step of providing a viscoelastic body, wherein the viscoelastic body is in contact with one or both of a beam and a floor frame, Low friction that enables horizontal movement of the viscoelastic body with respect to the contact surface of the beam or horizontal movement of the floor frame with respect to the contact surface of the viscoelastic body in a state where the viscoelastic body is placed Construction of a floor structure including a step having a resistance layer, (b) a step of positioning the viscoelastic body and the floor frame on the viscoelastic body on the beam, and (c) a step of fixing the beam to the floor frame by a fixing member. It concerns the method.

  The present invention makes it possible to finely adjust the floor frame relatively freely with respect to the viscoelastic body between the beams and without applying extra stress to the viscoelastic body when positioning the floor frame. Therefore, it is based on the knowledge that the workability of the floor structure and the vibration insulation ability of the viscoelastic body are improved.

  According to the present invention, the floor frame can be moved without applying deformation stress to the viscoelastic body, the workability of the floor structure construction is improved, and the vibration insulation capacity of the viscoelastic body is sufficient. You can get the floor structure that will be used in the future.

  The object of the present invention is to sufficiently utilize the performance of the viscoelastic body, such as vibration insulation capability, at the time of positioning the floor frame at the abutting portion between the beam of the viscoelastic body and at least one of the floor frame. By providing a low friction resistance layer that enables horizontal movement with respect to the elastic body, the workability of the floor structure is not impaired but rather improved.

(a) (Low friction resistance layer)
It is a layer that the viscoelastic body has in a portion that comes into contact with the beam or the floor frame. The low frictional resistance layer is formed by an excessive deformation stress applied to the viscoelastic body when the floor frame is placed and positioned on the viscoelastic body before the viscoelastic body is compressed and fixed between the beam and the floor frame. It is possible to move the floor frame in the horizontal direction so that it does not remain in the viscoelastic body. The low frictional resistance layer facilitates fine adjustment of the position of the floor frame on the beam, and prevents the residual viscoelastic body from having residual shear deformation at the time of fine adjustment, thereby preventing restoration to the position before fine adjustment. I can do it. For this, a layer having a small frictional resistance can be used. The layer having a low frictional resistance is a layer having a surface with a low friction coefficient, and hereinafter, unless otherwise specified, is referred to as a low frictional resistance layer. The low frictional resistance layer can be provided on one or both of the portion where the viscoelastic body is in contact with the beam and the portion where the viscoelastic body is in contact with the floor frame.

  The low frictional resistance layer may be formed integrally with the viscoelastic body, but may be provided in another form on the contact surface of the viscoelastic body with the beam. Such a low coefficient of friction layer is formed of craft tape, at least one of polyethylene, polypropylene, polyester, vinyl chloride, and the like, in particular, plastic tape, and can be formed by attaching them. In some cases, a sheet or film of polyethylene, polypropylene, polyester, nylon, EVA (ethylene vinyl acetate copolymer) or the like, or a low-foam foam of such material as a low friction resistance layer (spacer) is used as a viscoelastic material. It may be provided by laminating on the surface. The spacer adjusts the overall thickness of the viscoelastic body and may be provided separately from the low friction resistance layer. However, the spacer having a surface such as the above-described material also functions as the low friction resistance layer. However, when using a foam with low foam in this way, if necessary, it is compressed by applying a load with a predetermined safety factor in mind, and it is confirmed that there is no deformation of the foam with low repulsion itself. There is a need.

  In order to easily determine the low degree of frictional resistance, it is possible to use a stainless steel plate with a mirror finish made of a SUS 304 steel plate specified in JIS-G-4305. The viscoelastic body is placed on the low frictional resistance layer so that the stainless steel plate is gradually inclined and the angle at which the sliding starts is examined. In this method, the relationship between the ease of fine adjustment of the floor frame position during field work, the absence of residual shear deformation of the viscoelastic body, and the subsequent restoration of the floor frame to its original position If the sliding start inclination angle at this time is in the range of 45 ° or less, it is found from the experience that there is a correlation with very high accuracy that the problem is solved. At this time, if the inclination angle exceeds 45 °, the floor frame becomes difficult to move gradually, the viscoelastic body is easily subjected to shear deformation, the floor frame is also easily restored to the original position before fine adjustment, gradually, In some cases, the viscoelastic body is fixed in a state of undergoing shear deformation. If the inclination angle is less than 5 °, it is not preferable because it is too slippery, which makes it difficult to correct the position or increases the risk of pinching a finger between the floor frame and the like.

(b) (Viscoelastic material)
Various viscoelastic bodies can be used. Preferably, the viscoelastic body has low repulsion. Reducing the rebound resilience of a viscoelastic body can be achieved by using many rubbers and elastomers alone or in combination with other materials used in the rubber and paint industries. For example, a system in which butyl rubber is 80 wt% (weight) or more of the polymer is excellent. This is because butyl rubber has a small number of double bonds that become a cross-linked structure and inevitably has a low cross-linking density. As means for making this butyl rubber even more low-repellent, there are a method of using polyisobutylene, partially crosslinked rubber and reclaimed rubber as a polymer, and a method of adding a tackifier resin, asphalt and powder rubber.

  By the above means, a viscoelastic body (rubber) having a rebound resilience of 15% or less (at 20 ° C.) can be obtained. The viscoelastic body used in the present invention is used between the floor frame and the beam, and since the load on the floor frame is usually supported by a plurality of viscoelastic bodies, the shared load per viscoelastic body is relatively large. Depending on the case, the floor frame and the beam may be compression-fixed by fastening with a fixing jig. In this case, compression and fixation are performed in advance, and the rebound resilience is preferably 10% or less. 0% is ideal. The rebound resilience can be measured according to ISO-4662.

(c) (Viscoelastic body shape, etc.)
Viscoelastic bodies having various shapes can be used. The viscoelastic body needs to be further subjected to further impact deformation at the time of floor impact even during compression and fixation as described above. In order to cope with this quick impact deformation, the conventional strip-like object or linear object has a deformation resistance that is too large. Therefore, the viscoelastic body is preferably arranged on the beam in the form of dots. At this time, surprisingly, it was found that the generation of high-frequency sound of 500 Hz or more is very small and the audibility is very good when the dot arrangement is adopted.

  The viscoelastic body preferably has a low rebound resilience, while on the other hand, care must be taken to reduce the compression set, but at this time, the temperature may be considered within the range where it can be lived.

(d) (Adhesive layer)
The viscoelastic body can be interposed between the beam and the floor frame. In this case, the viscoelastic body can be fixed to or bonded to the beam or the floor frame. In addition, a viscoelastic body can be bonded to a beam or a floor frame in advance. In a preferred example, an ordinary adhesive layer can be used for the viscoelastic body, and an adhesive layer having adhesiveness to the oil adhesion surface (hereinafter referred to as adhesion to the oil adhesion surface). In particular, an adhesive layer having a viscosity may be referred to as an “adhesive layer”. The adhesive layer should have the property of easily absorbing and diffusing oil into the adhesive layer. Butyl rubber adhesive layer, acrylic adhesive layer, SIS adhesive layer An SBS adhesive layer is suitable.

  In order to secure the rigidity of the floor frame, steel materials may be used for the beam and floor frame, especially the viscoelastic body mounting part at the bottom of the floor frame. In this case, the cutting oil or rust preventive oil remains applied. In many cases, the oil content is the biggest obstacle to adhesiveness from the viewpoint of adhesiveness, and the steel material of the adherend is usually adhesive regardless of how many times it is wiped with a new surface of the waste. Adhesives cannot provide sufficient adhesive performance, and must rely on solvent-based and other alkaline cleaning degreasing agents. However, in recent years, solvents and the like have to be operated under special equipment from the viewpoints of safety to the human body and fire risk, and are not generally usable. Therefore, in such a case, an adhesive layer having adhesiveness to the oil adhesion surface is very effective.

Although it can be adhered to the oil-adhered surface, there is a natural degree of oil adhesion, and when rust-preventive oil is sprayed over the entire surface, it is too oily and must be wiped twice or more with a new waste cloth. . That is, in one wiping, the oil film becomes thin and spreads over the entire adherend surface. Next, if it wipes off with a new waste, most of the oil film on the surface of the adherend can be removed, but the oil is not completely removed. Therefore, the adhesive layer according to the present invention is for an oil-adhering surface, and can be sufficiently adhered to this extent, which is the difference from a normal adhesive layer. .
The adhesive layer having adhesiveness to the oil adhesion surface according to the present invention is applied to the oil adhesion surface according to JIS-Z-0237, and the 180 ° peel adhesion immediately after the application is 0.3. This refers to kgf (about 2.9N, hereinafter converted as 1kgf = 9.80665N) / 25mm or more. Preferably, the degree of adhesion to the oil deposition surface, the amount of anti-rust oil Daphne supercoat ^{TW0.5~3g / m 2 (5g / m} 2 was applied in the degree of wiped twice with a new waste state oil ) Is applied and uniformly extended, and the above is 0.3 kgf (about 2.9 N) / 25 mm or more.

  The adhesive layer absorbs and diffuses oil into the adhesive layer, so if the oil is not removed to some extent in the pretreatment as described above, the adhesive layer becomes too soft, such as in summer. In this case, a creep phenomenon may occur. On the other hand, the adhesive layer exhibits high adhesiveness due to its high oil diffusibility, and its adhesive strength over time is low immediately after application. Since an adhesive strength of about one day can be obtained, it is better to bond the viscoelastic body for several hours immediately after sticking or to apply the own weight of the viscoelastic body. It is better that there is no oil adhesion, but iron is often shipped with oil applied to prevent rust, etc., and there are various types of oil. If necessary, wipe off oil with a new waste cloth about twice. It is preferable to perform a treatment using an adhesive layer having adhesion surface adhesion. The preferred degree of oil adhesion for the adhesive layer is 0.3 kgf (about 2.9 N) / 25 mm or more in the peel adhesion as described above.

Hereinafter, the present invention will be sequentially described with respect to the constituent materials.
(1) (floor frame)
The floor frame is a floor component that is laid on beams facing each other. The floor frame may be an ALC floor slab, a PC floor slab, a plate material, etc., and these may be supported and fixed to a plurality of joists. The joist may be made of various materials such as wooden and steel, and a typical one is square wood. A steel material can be used for the joist of rigidity, and in this case, a square pipe is preferable because it is light enough to obtain rigidity.

  The floor frame itself is usually used in multiple numbers and is often independent of the entire floor.However, after being fixed horizontally between the beams, the floor frame is strung across the long and short seams between the floor frames. If a plate material is laminated on the upper side or the lower side of the frame and fixed with screws, etc., multiple floor frames become connected and integrated floors, and the floor frame becomes a wide and heavy floor. This is advantageous for impact resistance and the like. At this time, the laminated plate material can increase the difficulty of vibration of the floor frame itself if the long side of the plate material is orthogonal to the long side of the floor frame. Further, a plurality of different types of plate materials can be used. In the case of a plurality of plate materials, it is preferable to alternately cross the long sides of the plate materials alternately because it increases rigidity, but a plate material such as a sound insulation mat formed by mixing a high specific gravity filler with gypsum board or asphalt is not necessarily required. It is not necessary to make the long sides orthogonal. In order to prevent the floor frame from moving and dropping, the floor frame may be provided between the beams facing each other, and a movement stop may be provided on the beam, or the floor frame and the beam may be fixed with a fixing jig.

  A viscoelastic body can be provided in advance in the lower part of the floor frame. In this case, the viscoelastic body is dispersed in a point-like manner on the floor frame, the viscoelastic body is fixed with an adhesive layer, and a low friction resistance layer of the viscoelastic body is provided on the beam side of the viscoelastic body. Can be provided. Such a floor frame can be used after being laid horizontally so that the low frictional resistance layer of the viscoelastic body is in contact with the beam and finely adjusting the position of the floor frame. Thereafter, the floor frame and the beam may be further fastened and fixed with a fixing jig. In the case of fastening and fixing with a fixing jig, since a load equal to or greater than the shared load of the floor load is shared, it is necessary to be able to perform a quick buffer displacement from the compression fixation at the time of impact.

(2) (Viscoelastic body)
The standard of compression of the viscoelastic body can be determined in advance by determining the shared load based on the relationship between the compression load and displacement of the viscoelastic body and the number of the viscoelastic body used. Considering the buffer displacement from the compression fixation, the amount to be compressed in advance is preferably 5 to 35% of the thickness of the viscoelastic body, more preferably 15 to 25% in order to make quick buffer displacement. The compression ratio at this time does not include the thickness of the spacer or the like, and needs to be considered as a single viscoelastic body. The softness of the viscoelastic body is about 30 to 60 with a JIS-A type hardness tester.

  Since the viscoelastic body can be used in the form of a point instead of a line or a band, in this case, the viscoelastic body is easily displaced with respect to a floor impact, and vibration is easily insulated. As a result, the characteristics when used in the form of dots in this way, especially, the high frequency sound of 500 Hz or more is greatly reduced, and it feels very quiet for hearing. In particular, this viscoelastic body is not only good in vibration insulation by making it a viscoelastic body with low rebound resilience, but also has the advantage of reducing impact reaction force when subjected to floor impact. Such a soft viscoelastic body having low rebound resilience particularly improves vibration insulation when 80% by weight or more of the polymer component is made of butyl rubber. A proportion of 100% butyl rubber is ideal.

  In the viscoelastic body, it is necessary to provide a layer having a low frictional resistance on the surface in contact with the beam so that the fine adjustment of the position of the floor structure, particularly the floor frame, is facilitated and the shear deformation of the viscoelastic body does not occur. . When a viscoelastic body is provided in the lower part of the floor frame, the stress applied to each viscoelastic body increases, so it is necessary to devise a way to easily correct the positional deviation. The layer having a low frictional resistance provided on the viscoelastic body may be a film or sheet of silicon baked kraft paper, polyethylene, polypropylene, nylon, polyester, EVA, polyvinyl chloride or the like, and may be a foam in which the polymer is low foamed. Further, it may be a layer such as graphite, talc, mica, or the like coated with powder that easily peels between layers, or other powder.

(3) (floor frame with viscoelastic body)
A viscoelastic body previously bonded to the floor frame, typically a combination of a floor frame and a viscoelastic body, for example, a floor frame with a viscoelastic body can be used.

  The viscoelastic body may be attached to the lower part of the floor frame by using an adhesive layer, especially an adhesive layer that has sufficient adhesion to the oil adhesion surface. When a porous surface (porous material) is used, it is better to preliminarily plan the thickness of the adhesive layer in an amount sufficient to enter the porous surface and increase the thickness of the adhesive layer. In the case of ALC floor slabs, the appropriate thickness is about 0.5mm to 2.0mm.

  When steel is used for the viscoelastic body mounting part at the bottom of the floor frame, cutting oil or rust preventive oil is applied during processing, and a relatively large amount of oil is often attached, and the oil film is removed visually. Even if it looks like it, even if it is wiped 3 to 4 times with a new waste cloth, normal adhesive bonding is impossible, and it usually has to be bonded through a degreasing process. However, degreasing agents contain a large amount of solvents or a large amount of alkalis and surfactants. In any system, special equipment is required to avoid the risk of fire and safety to the human body. Not. Therefore, in such a case, if it is wiped with a new surface of the waste so that an oil film does not remain so that it can be handled even if there is no dedicated equipment for degreasing, the adhesion to the oil adhesion surface that can be sufficiently bonded is ensured. The adhesive layer which has can be provided.

  Adhesion to the oil adhesion surface is obtained by absorbing and diffusing the oil into the layer, so that the longer the time after sticking, the better the adhesive, and the higher the temperature, the better. Therefore, it is better to leave the viscoelastic body for several hours after sticking because it may be the weight of the viscoelastic body.

(4) (Beam)
As long as the beam supports the floor frame horizontally and the viscoelastic body is compressed and fixed, there are no restrictions on the structure and material. The pair of beams includes opposing beams. The viscoelastic body is pre-adhered to the beam so that the low frictional resistance layer of the viscoelastic body abuts against the floor frame so that no deformation stress remains in the viscoelastic body when positioning the floor frame. .

The present invention will be described in more detail with reference to the drawings.
FIG. 1 is a side view of an example floor structure. FIG. 2 is a plan view of the floor structure of FIG. FIG. 3 is a cross-sectional view of an example viscoelastic body. FIG. 4 is a cross-sectional view of another example of a viscoelastic body. FIG. 5 is a side view of another example floor structure. FIG. 6 is a plan view of the floor structure of FIG.

  FIG. 1 is a side view of an example floor structure 1. The floor structure 1 is compression-fixed between a pair of beams 2 (the opposite beams are in the right direction in FIG. 1), a floor frame 3 that is placed between the beams 2, and the beam 2 and the floor frame 3. The vibration-insulating viscoelastic body 4 and the fixing member 5 that fixes the beam 2 to the floor frame 3 are provided. The viscoelastic body 4 includes a viscoelastic body main body 4A, and is in a state where the floor frame 3 is placed in a state where the floor frame 3 is not fixed to the beam 2 by the fixing member 5 at a contact portion with the beam 2. The low-friction resistance layer 4B that enables the viscoelastic body 4 to move in the horizontal direction with respect to the contact surface of the beam 2 is provided. Alternatively or in addition, the viscoelastic body 4 is in a state in which the floor frame 3 is not fixed to the beam 2 by the fixing member 5 at the contact portion with the floor frame 3, It is possible to have a low friction resistance layer that enables horizontal movement with respect to the contact surface of the viscoelastic body 4.

  The viscoelastic body 4 has a low frictional resistance layer 4B on the side in contact with the beam 2. The low frictional resistance layer 4B is a layer having a small frictional resistance coefficient. In FIG. 1, the viscoelastic body 4 further has an adhesive layer 4C. The viscoelastic body 4 has a performance such as vibration insulation by the viscoelastic body main body 4A, between the beam 2 and the floor frame 3 by the low frictional resistance layer 4B, in particular, between the beam 2 and the viscoelastic body 4. It exhibits the three functions of mobility and fixation of the viscoelastic body 4 to the floor frame 3 by the adhesive layer 4C.

  When positioning the floor frame 3, the viscoelastic body 4 is affixed to the floor frame 3 in advance by the adhesive layer 4C, lifted together with the floor frame 3, and placed on the beam 2. The viscoelastic body 4 is interposed between the beam 2 and the floor frame 3. In many cases, in order to accurately position the floor frame 3, it is necessary to finely adjust the position of the roughly positioned floor frame 3. In this case, the low frictional resistance layer 4B of the viscoelastic body 4 is used as the floor frame 3. It is possible to allow smooth movement in the horizontal direction so that no unnecessary stress remains on the viscoelastic body body 4A and adversely affects vibration insulation.

  If the viscoelastic body 4 is interposed between the beam 2 and the floor frame 3 and exhibits the desired performance such as vibration insulation, it is compressed between the beam 2 and the floor frame 3 with a fixing jig 5 or the like. It may be fixed. In the floor structure 1, a plate material can be laminated on the floor frame 3, and adjacent floor frames 3 can be connected and integrated, but this is not particularly shown. The viscoelastic body of another example can be made common in that it has three functions, and can have different sizes (dimensions).

  FIG. 2 is a plan view of the floor structure 1 of FIG. The beams 2 are on both sides of the floor frame 3, but one side is omitted in FIG. The floor case 3 is provided with viscoelastic bodies 4 having three functions at the four corners, and the adhesive layer 4C is adhered to the lower surface of the floor case 3 although it is not found in FIG. The floor frame 3 can be fixed to the beam 2 by using a fixing jig 5 which is accommodated in the counterbore 3A and does not protrude onto the floor frame 3. The floor structure of another example uses a viscoelastic body having three functions in common, but the position of the viscoelastic body is set to a distance of, for example, 100 mm, and the dimensions of the viscoelastic body are reduced. The dimensions can be made different.

  FIG. 3 is a cross-sectional view of one example of a viscoelastic body 4 having three functions that can be used in FIGS. The viscoelastic body 4 includes a viscoelastic body main body 4A having vibration insulating properties, a low friction resistance layer 4B is provided on one surface thereof, and an adhesive layer 4C is provided on the other surface, and further the viscoelastic body 4A is provided. A protective release paper 4D is provided on the adhesive layer 4C. The protective release paper 4D is removed when adhering to a beam or a floor frame.

  FIG. 4 is a cross-sectional view of a viscoelastic body 14 of an example different from that of FIG. 3, but has three functions as in FIG. The viscoelastic body 14 includes a viscoelastic body main body 14A having vibration insulation, and a low frictional resistance layer 14B is thicker than that of FIG. The spacer is provided with a thickness. This can be used as a means for adjusting the height from the top of the beam to the finished surface without newly experimenting with the relationship between the compression displacement / compression stress of a known viscoelastic body. As in the case of FIG. 3, an adhesive layer 14C is provided on the remaining one surface, and a protective release paper 14D is provided on the adhesive layer 14C. As the adhesive layer, an adhesive layer can be used, and the adhesive layer has sufficient adhesiveness to the oil adhesion surface.

  FIG. 5 is a side view of a floor structure 21 of another example. In the floor structure 21, a floor frame 23 composed of a joist 26 and a plate material 27 is used. The viscoelastic body 24 includes a viscoelastic body 24A, a low friction resistance layer 24B is provided on the beam 22 side, abuts against the beam 22, and a viscoadhesive layer 24C is provided on the floor frame 23 side. It is provided and attached to the lower surface of the floor frame 23. The viscoelastic body 24 is compressed and fixed by a fixing jig 25. In this example, a plate material can be laminated on the floor frame 23 and the adjacent floor frame 23 can be connected and integrated, but the illustration is omitted.

  FIG. 6 is a plan view of the floor structure 21 of FIG. In FIG. 6, the floor frame 23 that supports the plate member 27 with three joists 26 is fixed on a single beam 22 by three fixing viscoelastic bodies 24 by a fixing jig 25. Indicates where you are.

Hereinafter, the present invention will be described in more detail based on examples.
(Example 1)
A floor structure as shown in FIGS. 1 and 2 is constructed using a viscoelastic body as shown in FIGS.
Joints with square pipe-shaped bolt fastening holes are installed at the four corners of the floor opening on the second floor of the laboratory. I-shaped steel beams are bolted to the joints. The I-type steel beam is obtained by welding an iron plate having holes matched to the bolt holes of the joint at both ends and the center. Type I steel beams are lifted from the laboratory floor. The I-shaped steel beam has two long sides and one short side as a large beam, and the remaining short side is a small beam.

  In order to support the floor frame with three short-side beams, viscoelastic bodies with three functions one at a time are adhered to the four corners of the ALC floor slab (100 mm thickness x 606 mm width x 1820 mm length) of the floor frame. Fixed with a layer, a low friction resistance layer is brought into contact with the beam, fine adjustment of the position of the ALC slab on the beam, ease of movement, residual shear deformation of the viscoelastic body, restoration after fine adjustment of the position, etc. Check. Table 1 shows the results of the situation of the viscoelastic body by adjusting the position of the floor frame.

Details of the experiment are shown below.
The viscoelastic body is Compound Formulation Example A (Table 2), and the adhesive layer is a 1 mm thick butyl rubber adhesive layer (because it is used for compression fixation, the thickness is ignored). Kraft tape is used for the low friction resistance layer. The size of the viscoelastic body is 6.5 mm total thickness × 40 mm width × 40 mm length.

  The floor frame is placed with the low frictional resistance layer of the viscoelastic body in contact with the beam, and then a fixing jig is inserted into the counterbore and through hole provided in advance, and the beam is placed between the beam and the floor frame. The viscoelastic body is compressed and fixed. In compression, the viscoelastic body is compressed 1.5 mm so that the thickness of 6.5 mm is 5 mm. Six ALC slabs are installed in parallel with the long side of the beam and the long side of the ALC slab.

  Here, the I-shaped steel girder has a cross section of 200 mm height × 100 mm width × 4 mm thickness (thickness in the height direction) × 5 mm thickness (thickness in the width direction), and the long side direction is 3.45 m long. The short side direction is 1.72m. The I-shaped steel beam is 200 mm high x 100 mm wide x 3 mm thick (height in the height direction) x 4.5 mm thick (thickness in the width direction) and is 1.72 m long. The I-shaped steel retaining beam is 190 mm high × 100 mm wide × 3.2 mm thick (height in the height direction) × 3.5 mm thick (thickness in the width direction) and is 1.72 m long.

  Next, the long side of the lower ALC floor slab and the long side of the upper particle board (15 mm thick x 910 mm wide x 1820 long) are perpendicular to each other so that the seam of the ALC floor slab and the joint of the particle board do not overlap The center of the width of the particle board is set on the short side seam of the lower ALC floor slab, and the particle board is fixed to the ALC floor slab at 303 pitches vertically and horizontally with a DAC screw. Next, fix the particle board with DAC screws on both sides in the same way, and then fix the particle board (15mm thickness x 455mm width x 1820 length) on both ends in the same way to make a connected integrated floor.

The sound receiving room directly under the laboratory has two independent ceilings with 12.5mm thick plasterboard, and glass wool 16K is placed in the ceiling with a thickness of 100mm. Next, floor impact sound was measured, and the results are shown in Table 1 together with the situation of the viscoelastic body by adjusting the position of the above-mentioned floor frame.
Also, the viscoelastic body was placed on a stainless steel plate (mirror finish with SUS 304 steel plate) with the low friction resistance layer on the bottom, the stainless steel plate was tilted, the sliding start angle was measured, and the result was Table 1 shows.
As the viscoelastic body alone, three cylindrical ones having a thickness of 12.5 mm and a diameter of 29 mm were prepared in advance, and the resilience elastic modulus was measured according to ISO-4662, and the results are shown in Table 1. Further, the hardness of this specimen was measured with an A-type hardness meter according to JIS-K-6253, and the results are shown in Table 1.
The viscoelastic adhesive layer was measured for thickness and the results are shown in Table 1. Next, a 180 ° peel test is performed according to JIS-Z-0237. At that time, 5 g / m ² of anti-rust oil Daphne Super Coat TW [made by Idemitsu Kosan Co., Ltd.] was applied on a stainless steel plate (mirror finish with SUS 304 steel plate) and wiped twice with a new surface of the cloth waste The adhesive layer is pasted there, and the adhesion immediately after the pasting and after 5 hours is measured. The results are shown in Table 1.

(Example 2)
A floor structure as shown in FIGS. 1 and 2 is constructed using a viscoelastic body as shown in FIGS.
Without changing the beam assembly of Example 1, the viscoelastic body with an adhesive layer is 8.5 mm thick x 40 mm wide x 50 mm long, and 1.6 times expanded polyethylene of 3 mm thick x 40 mm wide x 40 mm long is used as the low friction resistance layer. Affixed with double-sided tape to a total thickness of 11.5 mm, affixed 100 mm inside from each end of 606 width of ALC floor slab (100 mm thickness x 606 mm width x 1820 mm length), and placed on the beam for fine adjustment Then, compress and fix to 10mm thickness with a fixing jig. The viscoelastic body is that of Formulation Example B (Table 3), and the adhesive layer is the same 1 mm-thick butyl rubber adhesive layer as in Example 1 and is compressed and fixed, so the thickness is ignored. The ease of movement during position adjustment, the remaining shear deformation of the viscoelastic body, and the presence or absence of restoration to the original position were checked, and the results are shown in Table 1.

  In the same manner as in Example 1, a particle board (15 mm thickness x 910 mm width x 1820 mm length) was placed on the ALC floor plate with a DAC screw so that the long side of the ALC and the long side of the particle board were orthogonal and the seam was shifted. The floor slabs are connected and integrated at 303 pitches. Each test item was tested in the same manner as in Example 1, and the results are shown in Table 1.

(Example 3)
A floor structure as shown in FIGS. 1, 2, 5 and 6 is constructed using a viscoelastic body as shown in FIGS.
Using the beam set of Example 1, the floor frame is a square pipe (plate thickness 2.3 mm x 45 mm width x) at the center of the particle board (20 mm thickness x 910 mm width x 1820 mm length) and at a position 303 mm away from the center. (75mm height x 1820mm length) Use 3 screws fixed. The square pipe is previously provided with a hole for fastening the fixing jig, and a female screw is welded to the hole. Wipe the oil film on the viscoelastic body attachments at both ends of the square pipe twice with a new surface of the cloth. The viscoelastic body is of Formulation Formula A (Table 2) (6.5 mm thickness x 40 mm width x 40 mm length), with kraft tape pasted on one side and an oil adhering side viscose adhesion on the other side 0.3 A butyl rubber adhesive layer with a thickness of mm is applied. Affix the adhesive surface of the adhesive layer to the application surface of the square pipe that has been wiped off the oil film in advance, bring the craft tape surface into contact with the beam, and finely adjust the position. Fasten and fix the viscoelastic body to 5mm with a fixing jig.

  Next, a particle board (15 mm thickness × 910 mm width × 1820 mm length) is laminated on the floor frame so that the long side and the long side of the particle frame of the floor frame are orthogonal to each other and the seams do not coincide with each other, and screws are fixed. The height and width are 303 mm, floor impact sound was measured, and the results are shown in Table 1. The other test items were also measured in the same manner as in Example 1, and the results are shown in Table 1.

(Example 4)
A floor structure as shown in FIGS. 1, 2, 5 and 6 is constructed using a viscoelastic body as shown in FIGS.
Using the beam set of Example 1, the floor frame was made in the same manner as in Example 3, the viscoelastic body was prepared in Formulation Formula B (Table 3), the size was 8.5 mm thick x 40 mm wide x 40 mm long, Except for the adhesive layer, the viscoelastic body of Example 2 and low-foamed polyethylene are used. In the same manner as in Example 3, a 0.3 mm thick butyl rubber adhesive layer is pasted on one side as an adhesive layer. 1.6 times expanded polyethylene (3mm thickness x 40mm width x 40mm length is pasted on the other side to create a viscoelastic body, paste it on the square pipe on the underside of the floor frame, place it on the beam, finely adjust the position, and move Ease, shear deformation, and restoring properties were checked, and the results are shown in Table 1. Also, the viscoelastic body was compressed and fixed so that the thickness of the viscoelastic body became 10 mm with a fixing jig, and the floor frame was fixed in the same manner as in Example 3. A particle board (15 mm thick x 910 mm wide x 1820 mm long) was laminated and fixed to the floor, and floor impact sound was measured, and the results are shown in Table 1. The other items were tested in the same manner as in Example 1, and the results are shown in Table 1. Show.

(Comparative Example 1)
Using the beam set of Example 1, it is a belt-like viscoelastic body, has a width of 40 mm in the beam short side direction, three mountains are parallel to the long side direction, the center mountain is 6 mm high, and the mountain on both sides is high The viscoelastic body of Formulation Formula C (Table 4) having a thickness of 7.5 mm is used without using the low friction resistance layer. In addition, when the viscoelastic body of the example (formulation formulation examples A and B) is used without a low friction resistance layer, the workability is clearly inferior and shear deformation remains, so use a viscoelastic body that hardly retains shear deformation. . The one with the three peaks tends to retain shear deformation as compared with the embodiment, but is used as an example of what is currently used and exhibits good vibration insulation.
The viscoelastic body is attached to the beam by taking a protective release paper of a double-sided tape (adhesive layer) provided on the back surface. For the beam at the center of the beam assembly, two rows are pasted in the form of a strip in the long side direction. For the short side beams on both sides, one row is pasted along the long side of the beam on the opening side, and the ALC floor slab is placed on top Finely adjust the position and check the shear deformation of the belt-like viscoelastic body, ease of movement, and restoration of the ALC floor slab. The results are shown in Table 1. The ALC floor slab and beam are compressed and fixed with a fixing jig so that the height of the band-like viscoelastic body is 6.5 mm.
A particle board (15 mm thickness × 910 mm width × 1820 mm length) is laminated on the ALC floor board in the same manner as in Example 1, and the floor impact sound is measured by fixing the DAC screws. The results are shown in Table 1. Other test items were measured in the same manner as in Example 1, and the results are shown in Table 1.

Hereinafter, with reference to Tables 1 to 4, the present invention will be described in more detail based on experimental results of Examples and Comparative Examples.
Example 1 is an example in which a kraft tape is used as the low frictional resistance layer, a viscoelastic body having a low rebound resilience is used, vibration insulation is exhibited, and the floor frame is fixed with an adhesive layer. The soft (hardness 45) viscoelastic body is fixed to the beam by compressing the 6.5mm thickness to 5mm, ie 1.5mm. The sliding start angle on the stainless steel plate is 18 °, the frictional resistance is small, the fine adjustment of the position of the floor frame is easy, and there is no residual shear deformation or the restoring tendency of the floor frame position in the viscoelastic body. The viscoelastic body has a hardness of 45 and a rebound resilience of 8 and high vibration insulation. As a result, the floor impact sound can be reduced sufficiently, especially in the high frequency range of 500Hz and higher, and in an annoying frequency band. It can be seen that audibility favorability can be obtained in that the improvement effect is particularly great.

  Example 2 is an example in which the low friction resistance layer is made of low-foamed polyethylene, and is an example in which a viscoelastic body having a low rebound resilience is used to exhibit vibration insulation and is fixed to the floor surface of the floor with an adhesive layer. is there. The soft (hardness 40) viscoelastic body is fixed to the beam by compressing the 11.5 mm thickness to 10 mm, that is, 1.5 mm. The sliding start angle on the stainless steel plate is 15 °, the frictional resistance is small, the fine adjustment of the position of the floor frame is easy, and the shear deformation remains in the viscoelastic body and the restoration tendency of the position of the floor frame is not seen. The viscoelastic body has a hardness of 40 and a rebound resilience of 6 and high vibration insulation. As a result, the floor impact sound can be reduced sufficiently, especially in the high frequency range of 500Hz and above, and the harsh frequency band. It can be seen that favorable audibility is obtained in that the improvement effect is particularly great.

  Example 3 uses kraft tape as a low friction resistance layer, exhibits vibration insulation using a viscoelastic body with low rebound resilience, and is fixed to the bottom surface of the floor frame with an adhesive layer having oil surface adhesion This is an example. The adhesiveness of the adhesive layer increases further with time from immediately after application. The viscoelastic body itself is the same as that used in Example 1, there is no residual shear deformation of the viscoelastic body by adjusting the position of the floor frame, and there is no tendency to restore the position. The floor impact sound is also sufficiently reduced, and it can be seen that the reduction in the high frequency range of 500 Hz or more is particularly large compared to Comparative Example 1.

  In Example 4, the same low foamed polyethylene as in Example 2 is used as the viscoelastic body and the low friction resistance layer, and only the adhesive layer is changed to an oil surface adhesive layer. There is no residual shear deformation of the viscoelastic body by adjusting the position of the floor frame, and there is no tendency to restore the position. The floor impact sound can also be reduced sufficiently, especially the effect of improving high frequency sound above 500Hz is high.

  Comparative Example 1 is an example in which a viscoelastic body is used which has a belt-like shape on the long side of the beam, three ridges parallel to the long side, a central ridge that is lower than the ridges on both sides, and no low friction resistance layer. The viscoelastic body is directly bonded to the beam and is not fixed to the floor frame. Therefore, in this example, when the floor frame is aligned, the floor frame moves on the viscoelastic body while applying stress to the viscoelastic body. It can be seen that the viscoelastic body has a large sliding start angle on the stainless steel plate of 57 ° and a large frictional resistance. As a result, by adjusting the position of the floor frame, the viscoelastic body remains sheared in the mountain, and a tendency to restore the position of the floor frame is seen. This viscoelastic body has a large rebound resilience of 48, and as a result, there is little improvement in floor impact sound. In particular, compared with Examples 1 to 4, it can be seen that the amount of sound generation at 500 Hz or more is large despite the presence of a viscoelastic body. This feels more noisy than actual data in terms of hearing.

  As described above, according to the present invention, the position of the floor frame is easy to adjust, and since there is no residual shear deformation in the viscoelastic body, the vibration insulating effect of the original viscoelastic body can be exhibited, the rebound resilience is low, and the vibration Insulation is not hindered. Moreover, the floor structure of the present invention is excellent in workability of the floor structure, has a high effect of reducing floor impact sound, and is particularly effective in reducing high frequency sound. Further, in the present invention, by providing an oil surface adhesive layer on the viscoelastic body, even if the adhesive surface of the viscoelastic body to the floor frame is an oil surface, the adhesive layer is bonded immediately after application, If the floor frame with viscoelastic body is bonded in advance and the floor frame is loaded and placed on the construction site, the workability of the floor structure can be remarkably improved.

It is a side view of an example floor structure. FIG. 2 is a plan view of the floor structure of FIG. It is sectional drawing of the viscoelastic body of an example. It is sectional drawing of the viscoelastic body of another example. It is a side view of the floor structure of another example. FIG. 6 is a plan view of the floor structure of FIG. It is a side view of the floor concerning a comparative example. FIG. 8 is a plan view of the floor of FIG.

Explanation of symbols

1, 21 Floor structure
2, 22 beams
3, 23 floor frame
3A counterbore
4, 14, 24 Viscoelastic body
4A, 14A, 24A Viscoelastic body
4B, 14B, 24B Low friction resistance layer
4C, 14C, 24C Adhesive layer
4D, 14D protective release paper
5, 25 Fixing jig
26 jota
27 Board material

Claims (9)

A floor provided with a pair of beams, a floor frame laid horizontally between the beams, a fixing member that fixes the beam to the floor frame, and a vibration insulating viscoelastic body that is compressed and fixed between the beam and the floor frame Structure,
The viscoelastic body is in a state in which the floor frame is placed in a state where the floor frame is not fixed to the beam by a fixing member at a contact portion with one or both of the beam and the floor frame. A floor having a low frictional resistance layer that enables horizontal movement of the body with respect to the contact surface of the beam or horizontal movement of the floor frame with respect to the contact surface of the viscoelastic body, Construction. A floor provided with a pair of beams, a floor frame laid horizontally between the beams, a fixing member that fixes the beam to the floor frame, and a vibration insulating viscoelastic body that is compressed and fixed between the beam and the floor frame Structure,
The viscoelastic body is in contact with the beam of the viscoelastic body in a state where the floor frame is placed in a state where the floor frame is not fixed to the beam by a fixing member at a contact portion with the beam. A floor structure characterized by having a low friction resistance layer capable of moving in a horizontal direction with respect to a contact surface, and having an adhesive layer at a contact portion with the floor frame .   The floor structure according to claim 1 or 2, wherein the floor frame comprises a plate-like body fixedly supported by a plurality of joists.   A vibration-insulating viscoelastic body disposed between the beam and the floor frame and compressed and fixed by a fixing member that fixes the beam and the floor frame, and a contact portion with one or both of the beam and the floor frame Further, when the floor frame is not fixed to the beam by a fixing member, the viscoelastic body in a state where the floor frame is placed is moved in the horizontal direction with respect to the contact surface of the beam or the floor frame. The viscoelastic body has a low friction resistance layer that enables horizontal movement with respect to the contact surface of the viscoelastic body. A vibration-insulating viscoelastic body that is disposed between a beam and a floor frame and is compressed and fixed by a fixing member that fixes the beam and the floor frame. A low frictional resistance layer that enables the viscoelastic body to move in a horizontal direction with respect to the contact surface of the beam in a state in which the floor case is placed in an unfixed state of the floor case. A viscoelastic body having an adhesive layer at a contact portion with the floor frame .   The viscoelastic body according to claim 4 or 5, wherein the viscoelastic body has a rebound resilience of 15% or less.   The surface of the low frictional resistance layer of the viscoelastic body is brought into contact with a stainless steel plate, and when the stainless steel plate is tilted, the viscoelastic body starts sliding down at an inclination angle of 45 ° or less. The viscoelastic body according to one item.   The viscoelastic body according to any one of claims 5 to 7, wherein the adhesive layer has adhesiveness to the oil adhesion surface. A floor provided with a pair of beams, a floor frame laid horizontally between the beams, a fixing member that fixes the beam to the floor frame, and a vibration insulating viscoelastic body that is compressed and fixed between the beam and the floor frame In constructing the structure,
(A) A step of providing a viscoelastic body, wherein the viscoelastic body is in a state where the floor casing is placed on a contact portion with one or both of the beam and the floor casing. A step of having a low frictional resistance layer that enables horizontal movement with respect to the contact surface of the beam or horizontal movement of the floor frame with respect to the contact surface of the viscoelastic body,
(B) a step of positioning the viscoelastic body and the floor frame on the viscoelastic body on the beam; and (c) a step of fixing the beam to the floor frame by a fixing member. Method.

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