JP2011102532A - Double floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively prevent a floor squeaking phenomenon in a floor structure using support legs and a board-based cushioning material. <P>SOLUTION: This double floor structure has a structure to support a corner part (3a) or an edge part of a floor backing plate (3) by an upper support plate (14) of the support leg (1) arranged on a floor slab, to fix the board-based cushioning material (4) on the floor backing plate and to further fix a floor finishing material (5) on the board-based cushioning material. The board-based cushioning material is formed of a gypsum-based face material having a gypsum core material. The lower face of the gypsum-based face material is formed of an exposed surface of the gypsum core material, a surface treated coating layer of resin, a planar resin coating layer, a multipoint-like resin coating layer, an emboss-like resin coating layer, a multiple linear resin coating layer, a resin sheet, nonwoven fabric, woven fabric, or embossed paper or sheet. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a double floor structure, and more particularly to a double floor structure in which a floor base plate, a board cushioning material and a floor finish are supported by support legs arranged on a floor slab. is there.

  As a double floor structure of a medium- and high-rise building, there is known a double floor structure of a floor advance method in which a floor base plate, a board cushioning material and a floor finishing material are supported by supporting legs arranged on a concrete floor slab. This type of double-floor structure is superior in terms of the degree of freedom in building plan planning, etc., and the formation and securing of piping and wiring space for building facilities. (Skeleton Infill) This is compatible with the recent trend of building technology that places emphasis on housing, etc., and for this reason, the tendency to be actively employed in the design and construction of apartment buildings and the like is particularly remarkable in recent years.

  FIG. 8 is a longitudinal sectional view and a partially enlarged sectional view showing a configuration of a conventional double floor structure. 9 (A) to 9 (D) are longitudinal sectional views showing the construction method of the double floor structure shown in FIG. 8 in stages, and FIG. 9 (E) is shown in FIG. 9 (B). It is a top view of the floor structure in a process.

  As shown in FIG. 8, the double floor structure includes a support leg 1 disposed on the concrete floor slab C, a support plate 14 supported by the support leg 1, and a floor base plate 3 supported by the support plate 14. The board cushioning material 4 fixed on the floor base plate 3 and the floor finishing material 5 fixed on the board cushioning material 4 are configured.

  9A to 9D show the construction process of the double floor structure shown in FIG. 8 step by step. As shown in FIG. 9A, a large number of support legs 1 are erected on the concrete floor slab C. Each support leg 1 has an elastically deformable vibration isolation pedestal 11 seated on the top surface of the concrete floor slab C, an externally threaded support column 12 extending vertically upward from the vibration isolation pedestal 11, and a coupling tool 13 with an internal screw. It is comprised from the horizontal support plate 14 inserted by the part. The inner screw of the connector 13 is screwed with the outer screw of the support column 12.

  As shown in FIG. 9B, the corners and edges of each floor base plate 3 are fixed on the support plate 14 and supported by the support leg 1 via the support plate 14. FIG. 9E shows a state in which the floor base plate 3 is fixed on the support plate 14. The floor base plate 3 is made of a particle board having a plate thickness of 20 mm, a width of 600 mm, and a length of 1820 mm, and is fixed to the upper surface of the support plate 14 by fastening screws 6. As shown in FIG. 9E, a screw head groove 18 that can be engaged with a driver tip, a hexagon wrench, or the like is provided at the upper end of the column 12. If desired, an adhesive may be used in combination for fastening the floor base plate 3 to the support plate 14. Between the floor base plate 3 and the concrete floor finishing material C, an underfloor space 2 is formed which is concealed from the indoor space except for a gap between the joint portions 7.

  As shown in FIG. 9C, the board cushioning material 4 is laminated on the floor base plate 3, and the floor finish 5 is further laminated on the board cushioning material 4 as shown in FIG. 9D. The board cushioning material 4 is made of, for example, a hard gypsum board having a thickness of 12.5 mm, a width of 600 mm, and a length of 1820 mm, and is fixed to the upper surface of the floor base plate 3 by a fixing tool (not shown) such as a fastening screw or a nail. The The floor base material 3 and the board cushioning material 4 maintain the surface contact state by the holding force of the fixture, and the relative horizontal displacement of the floor foundation material 3 and the board cushioning material 4 is determined by the shear strength of the fixture and the face material. It is blocked by the friction between them.

  Such a double floor structure of the preceding floor construction method is disclosed in, for example, JP-A-11-13269, JP-A-11-13270, JP-A-9-242111, JP-A-2002-106152, JP-A-2008. -274680.

Japanese Patent Laid-Open No. 11-13269 Japanese Patent Laid-Open No. 11-13270 Japanese Patent Laid-Open No. 9-24211 JP 2002-106152 A JP 2008-274680 A

  In this way, regarding floor structures using support legs and board cushioning materials, the problem of floor squealing has been pointed out. This phenomenon occurs due to uncertain and complex factors such as fixing method, drying / shrinkage, and the cause has been considered to be extremely difficult to identify.

  Therefore, since the cause of the squealing phenomenon in the floor structure using the support legs and the board cushioning material is unknown, effective measures for effectively preventing the squealing phenomenon have not yet been taken. There are circumstances.

  This invention is made | formed in view of such a situation, The place made into the objective can prevent the flooring phenomenon in the floor structure using a support leg and a board type | system | group shock absorbing material effectively. It is to provide a double floor structure.

In order to achieve the above object, the present invention supports the corners or edges of the floor base plate by the upper support plates of the support legs arranged on the floor slab, and fixes the board cushioning material on the floor base plate. In a double floor structure having a structure in which a floor finishing material is further fixed on the board cushioning material,
The board cushioning material comprises a gypsum-based face material having a gypsum core material, and the lower surface of the gypsum-based face material includes an exposed surface of the gypsum core material, a resin surface treatment film layer, a planar resin coating layer, A double floor structure comprising a point-like resin coating layer, an embossed resin coating layer, a number of linear resin coating layers, a resin sheet, a nonwoven fabric, a woven fabric, or an embossed paper or sheet. I will provide a. In the present specification, the “lower surface” of the face material means the surface of the face material, etc., which is positioned on the lower side in the vertical direction at the time of floor construction or construction, and the “upper surface” of the face material, etc. It shall mean the surface of a face material or the like located at the upper side in the vertical direction at the time of construction or construction.

  According to the above-described configuration of the present invention, the board-based cushioning may be caused by a decrease in the surface hardness of the lower surface of the board-based cushioning material, a decrease in the surface friction coefficient of the lower surface of the board-based cushioning material, or the separation between the lower surface of the board-based cushioning material and the floor base plate Generation of rubbing sound due to the densification of the structure on the lower surface of the material can be prevented, and the floor noise phenomenon can be effectively prevented.

The present invention also supports the corners or edges of the floor base plate by the upper support plates of the support legs arranged on the floor slab, and fixes the board-type cushioning material on the floor base plate. In a double floor structure having a structure in which a floor finish is further fixed on the top,
The board-based cushioning material is composed of a gypsum-based face material having a gypsum core material, and a resin sheet, a nonwoven fabric, a woven cloth, or an emboss between the lower surface of the gypsum-based face material and the upper surface of the floor base plate. Provided is a double floor structure in which a processed paper or sheet is inserted in a region including at least the corners or edges.

  According to the above configuration of the present invention, the lower surface on the board buffer material side that contacts the upper surface of the corner or edge of the floor base plate by inserting a sheet or the like between the bottom surface of the board buffer material and the floor base material. Can reduce the surface hardness or surface friction coefficient of the board or separate the lower surface of the board cushioning material from the floor base plate, thereby preventing the generation of rubbing noise caused by the denser structure of the lower surface of the board cushioning material. In addition, it is possible to effectively prevent the floor noise phenomenon.

  According to the double floor structure of the present invention, it is possible to effectively prevent a floor squealing phenomenon in a floor structure using a support leg and a board cushioning material.

It is the longitudinal cross-sectional view and partial expanded sectional view of a double floor structure for demonstrating the generation | occurrence | production cause of a floor noise phenomenon. It is a top view of the double floor structure for demonstrating the generation | occurrence | production cause of a floor noise phenomenon. It is the longitudinal cross-sectional view, the partial expanded sectional view, and top view of a double floor structure for demonstrating the other generation | occurrence | production cause of a floor noise phenomenon. It is the longitudinal cross-sectional view and partial expanded sectional view of the double floor structure which show 1st Example of this invention. It is the longitudinal cross-sectional view and partial expanded sectional view of the double floor structure which show 2nd Example of this invention. It is the longitudinal cross-sectional view and partial expanded sectional view of the double floor structure which show 3rd Example of this invention. It is the longitudinal cross-sectional view and partial expanded sectional view of the double floor structure which show 4th Example of this invention. It is the longitudinal cross-sectional view which shows the structure of the conventional double floor structure, and a partial expanded sectional view. It is the longitudinal cross-sectional view and top view which show the construction method of the double floor structure shown in FIG. 8 in steps.

  According to a preferred embodiment of the present invention, an exposed surface of a gypsum core material, a resin surface treatment coating layer, a planar resin coating layer, a multipoint resin coating layer, an embossed resin coating layer, and a number of wires Surface hardness of 65 or less obtained as a measured value by a rubber hardness meter (type D) in accordance with JIS K 6253: 2006 on the lower surface of the resin-like resin coating layer, resin sheet, nonwoven fabric, woven fabric, or embossed paper or sheet Have For example, the board-based cushioning material comprises a gypsum board containing a glass fiber nonwoven fabric in which a glass fiber nonwoven fabric is embedded on both front and back surfaces of a gypsum core material, and the surface layer portion is reinforced with a glass fiber nonwoven fabric. It is an exposed surface of the core material.

  According to another preferred embodiment of the present invention, a planar resin coating layer, a multipoint resin coating layer, an embossed resin coating layer, a number of linear resin coating layers, a resin sheet, a nonwoven fabric, and a woven fabric Alternatively, the embossed paper or sheet has a thickness of 0.2 mm or more, preferably 0.3 mm or more, and the lower surface of the board cushioning material and the upper surface of the floor base plate are separated from each other. For example, the above-mentioned board buffer material is a gypsum board formed by coating both sides of a gypsum core material with a base paper for gypsum board, and the base paper for the bottom side of the gypsum board has a resin adhesive and a synthetic rubber adhesive. A large number of linear or dotted coatings of an adhesive or latex adhesive are applied. These coated products form a multipoint resin coating layer or a linear resin coating layer having a thickness of 0.2 mm or more, preferably 0.3 mm or more.

According to still another preferred embodiment of the present invention, the surface treatment film layer, the resin coating layer or the resin sheet forming the lower surface of the gypsum-based face material, or the lower surface of the gypsum-based face material and the upper surface of the floor base plate The lower surface of the resin sheet inserted between the layers has a lower surface friction coefficient than the base paper for gypsum board. Preferably, the board-based cushioning material is a gypsum board formed by coating both sides of a gypsum-based core material with a gypsum board base paper, and the bottom side gypsum board base paper constituting the bottom surface of the gypsum-based face material Then, a surface treatment is applied by applying a resin paint or stearates, and by this surface treatment, a surface treatment film layer having a lower surface friction coefficient than the base paper for gypsum board is formed on the lower surface of the gypsum board. More preferably, as a resin paint or stearates, a two-component urethane acrylic paint or an aqueous potassium stearate solution having an application amount of 5.0 g / m ² or more is applied to the surface of the gypsum board base paper on the lower surface side. As a modified example, a Teflon (registered trademark) sheet, a polypropylene sheet, a polyethylene sheet, or a polyolefin sheet may be interposed between the lower surface of the gypsum-based face material and the upper surface of the floor base plate as the resin sheet.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  1, 2 and 3 are a longitudinal sectional view, a partially enlarged sectional view and a plan view for explaining the cause of the occurrence of a floor noise phenomenon in a double floor structure, and FIG. 4 is a preferred embodiment of the present invention. It is the longitudinal cross-sectional view and partial expanded sectional view of the double-floor structure which show an Example.

  In a double-floor structure in which a floor base plate and a gypsum-based face material (board-based cushioning material) are supported by support legs with elastically damped anti-vibration pedestals, the cause of the occurrence of the floor squealing phenomenon can be specified. It is extremely difficult and the cause has been unknown for many years. However, it has been found by our inventor's recent experiments and studies that many floor squeaking phenomena are due to specific causes described below.

  Before describing the embodiments of the present invention, the cause of the ringing phenomenon of the double floor structure obtained by the present inventors through experiments will be described with reference to FIGS.

  FIG. 1 is a longitudinal cross-sectional view and a partial enlarged cross-sectional view illustrating the deformation or behavior of a double floor structure during use. In FIG. 1 (A), a live load F such as a human treading pressure is applied to the floor surface. The state which is not acting is shown, and the state where live load F acted on the floor surface is shown in Drawing 1 (B). FIG. 2 is a plan view of the double floor structure shown in a state after the construction of the floor base plate and before the construction of the board cushioning material.

  In the double floor structure, corners or edges of the floor base plate 3 are supported by the upper support plates 14 of the support legs 1 arranged on the concrete floor slab C, and the board cushioning material 4 is fixed on the floor base plate 3. The floor finishing material 5 is further fixed on the board cushioning material 4 and is a double floor structure (hereinafter, simply referred to as “floor structure”) of the floor prior construction method.

  Each support leg 1 has an elastically deformable vibration isolation pedestal 11 seated on the top surface of the concrete floor slab C, an externally threaded support column 12 extending vertically upward from the vibration isolation pedestal 11, and a coupling tool 13 with an internal screw. It is comprised from the horizontal support plate 14 inserted by the part. The anti-vibration base 11 has an elastic body such as rubber or elastomer that elastically supports the column 12. The inner screw of the connector 13 is screwed with the outer screw of the support column 12. A screw head groove 18 (FIG. 2) that can be engaged with a driver tip, a hexagon wrench, or the like is provided at the upper end of the column 12.

  The floor base plate 3 is made of a particle board having a plate thickness of 20 mm, a width of 600 mm, and a length of 1820 mm, and is fixed to the upper surface of the support plate 14 by fastening screws 6. As shown in FIG. 2, the edges of adjacent floor base plates 3 are separated by a predetermined dimension, and joint portions 7 are formed between the floor base plates 3. Between the floor base plate 3 and the concrete floor finishing material C, an underfloor space 2 concealed from the indoor space is formed.

  The board cushioning material 4 is made of a hard gypsum board having a thickness of 12.5 mm, a width of 600 mm, and a length of 1820 mm, and is fixed to the upper surface of the floor base plate 3 by a fixing tool (not shown) such as a fastening screw or a nail. A gypsum board such as a hard gypsum board is a gypsum-based face material obtained by coating and molding both sides of a gypsum-based core material 4a with a base paper for board 4b (JIS A 6901).

  The fastening screw 6 for fixing the floor base plate 3 to the support plate 14 is ideally screwed into the floor base plate 3 and the support plate 14 vertically as shown in the right half of FIG. It is desirable that the screw head top surface 6 a be constructed so as to be flush with the upper surface of the floor base plate 3 or slightly below the upper surface of the floor base plate 3.

  However, in the actual construction site construction, as shown in the left half of FIG. 1A, the retaining screw 6 is slightly inclined, and the screw head top surface 6a tends to protrude from the upper surface of the floor base plate 3. It is extremely difficult to reliably prevent this.

  In such a floor structure, as shown in FIG. 1B, when a live load F such as a human stepping pressure is applied, the vibration isolation pedestal 11 is elastically distorted and compressively deformed by the action of the live load F. The floor materials 3, 4, and 5 are bent downward by the deformation of the vibration isolation pedestal 11. Since the live load F such as a human stepping pressure is released in a short time, the floor structure is restored to the initial state shown in FIG. Since the live load F repeatedly acts on the floor surface in connection with the activities of residents and the like, the initial state shown in FIG. 1A and the flexural deformation state shown in FIG. It occurs repeatedly.

  As shown in a partially enlarged view in FIG. 1 (B), the screw head portion 6b of the retaining screw 6 transiently bites into the lower surface of the board cushioning material 4 in the flexural deformation state of the floor structure. Is repeatedly generated, the lower surface portion (board base paper 4b) of the board cushioning material 4 into which the screw head portion 6b is press-fitted is consolidated by repeated press-fitting of the screw head portion 6b. As a result, a permanent recess 4 c that is not restored even in the initial state is shaped or formed on the lower surface of the board cushioning material 4. The board base paper 4b in the portion of the recess 4c in contact with the screw head portion 6b has a dense structure due to repeated compaction action. However, the portion of the board cushioning material 4 other than the recess 4 c maintains the surface contact state with the upper surface of the floor base plate 3 by the holding force of the retaining screw 6.

  In a floor structure in which such a depression 4c is formed immediately above the screw head portion 6b, the active load F acts on the floor structure and the floor structure is bent and deformed as shown in FIG. When the floor structure is about to be restored to the initial state (FIG. 1 (A)) instantaneously by releasing the load F, a rubbing sound is generated by rubbing between the surface (lower surface) of the dented recess 4c and the screw top surface 6a. This sound is generated and perceived as a floor sound by a person in the room.

  Such a ringing phenomenon occurs when the depth (height) of the recess 4c is h = 0.2 to 0.5 mm when the screw head top surface 6a has a circular diameter of a normal screw head (about 8 mm in diameter). Although it occurs, it has been found that when the depth h is less than 0.2 mm or more than 0.5 mm, the flooring phenomenon hardly occurs.

  Further, this kind of floor noise phenomenon is not only in the relationship between the screw head portion 6b and the board cushioning material 4, but also in the relationship between the corner 3a of the floor base plate 3 and the board cushioning material 4 shown in FIG. appear.

  3A and 3B are partially enlarged cross-sectional views illustrating the deformation or behavior of the floor structure during use, as in FIG. FIG. 3 (A) shows a state where a live load F such as a person's stepping pressure is not acting on the floor surface, and FIG. 3 (B) shows a state where the live load F is acting on the floor surface. It is shown. FIG. 3C is a plan view showing a corner portion 3a of the floor base plate 3 that generates a rubbing sound.

  The corner 3a of the floor base plate 3 is preferably in a state where the upper surface thereof is horizontal, but in actual construction work, a sharp state occurs so that the upper surface of the corner 3a protrudes slightly upward. easy. The corner portion 3a slightly protruding upward bites into the lower surface of the board cushioning material 4 in a transitional deformation state of the floor structure, similarly to the screw head portion 6b of the retaining screw 6. When this state occurs repeatedly, the lower surface portion (board base paper 4b) of the board cushioning material 4 into which the corners 3a are press-fitted becomes consolidated. As a result, a permanent recess 4d that is not restored even in the initial state is shaped or formed on the lower surface of the board cushioning material 4. Similar to the above-described recess 4c formed by the screw head portion 6b, the board base paper 4b in the portion of the recess 4d in contact with the corner 3a has a dense structure due to repeated compaction action. However, the portion of the board cushioning material 4 other than the recess 4 d maintains the surface contact state with the upper surface of the floor base plate 3 by the holding force of the retaining screw 6.

  The floor structure in which such depressions 4d are formed is flexibly deformed as shown in FIG. 3 (B) by the action of the live load F, and then restored to the initial state (FIG. 3 (A)) by releasing the live load F. At this time, a rubbing sound is generated by rubbing between the surface of the dented recess 4d and the upward projecting region 3b of the corner 3a shown in FIG. This sound is perceived as a floor sound by a person in the room.

  Such a floor noise phenomenon occurs when the depth of the recess 4d (height) h = 0.2 to 0.5 mm when the range of the upper surface of the corner 3a slightly protruding upward is 10 mm × 10 mm. However, as in the case of the screw head top surface 6a (FIG. 1), when the depth h is less than 0.2 mm or more than 0.5 mm, the floor noise phenomenon hardly occurs.

  Based on such a phenomenon, the generation mechanism of the above-described floor noise phenomenon is considered as follows.

(1) When a live load F such as a person's stepping pressure acts on the floor surface, the floor materials 3, 4, 5 are bent downward by elastic deformation of the vibration isolation pedestal 11, and the screw head portion 6 b of the retaining screw 6 Such heads or tops of screws, screws, nails and the like, and sharp upward protrusions (upward protruding regions 3b) such as corners 3a of the floor base plate 3 repeatedly press-fit into the lower surface of the board cushioning material 4, thereby The board base paper 4b of the board cushioning material 4 is transiently pressed (FIG. 1 (B) and FIG. 3 (B)).

(2) When the live load F is released, the flexure of the floor materials 3, 4, and 5 is eliminated by the elastic restoring force of the vibration isolation pedestal 11, and the pressure on the board base paper 4b is removed.

(3) When the live load F repeatedly acts on the floor surface, pressure is repeatedly applied to and removed from the board base paper 4b, and the head portion or the top portion of screws, screws, nails, the corner portion 3a of the floor base plate 3, etc. The board base paper 4b in contact with the upward projecting portion is consolidated. The paper of the board base paper 4b is in a state in which a large number of fibers are entangled with each other through gaps. However, by repeatedly compressing, the gaps between the fibers are reduced or disappeared, and the fibers are aggregated or closely adhered.

(4) Woody materials such as paper and pulp are materials that tend to generate scratching noise when in contact with hard metal or woody material, but the surface hardens and becomes denser due to the densification of the board base paper 4b. As a result of the formation of the depressions 4c and 4d that generate the relative displacement and scratching phenomenon between the surface of the board base paper 4b and the screw head top surface 6a or the upward projecting region 3b, the board base paper 4b and the metal or corner 3a of the screw head top surface A state in which a rubbing sound is generated due to rubbing with the upper projecting region 3b of the first and second upper projection regions 3b occurs.

(5) In such a state, when the live load F acts on the floor surface and the floor materials 3, 4 and 5 are deflected and restored, the board base paper 4b and the screw head top surface 6a or the upward projecting region 3b are scratched. However, a relatively high high-frequency rubbing sound is generated, and this sound is recognized as a floor sound by a person in the room.

  FIG. 4 is a longitudinal sectional view of the floor structure showing the first embodiment of the present invention. The floor structure is a gypsum surface whose surface layer is not coated with paper as a measure for preventing such rubbing noise. The material is used as the board cushioning material 4.

  The floor structure shown in FIG. 4 is similar to the floor structure shown in FIGS. 1 to 3, and the floor base plate 3 supported by a number of support legs 1 arranged on the concrete floor slab C, and the top surface of the floor base plate 3. The board-type cushioning material 4 fixed to the board-type cushioning material 4 and the floor finishing material 5 fixed to the upper surface of the board-type cushioning material 4. Similar to the floor structure shown in FIGS. 1 to 3, the floor base plate 3 is made of a particle board, and is fixed to the upper surface of the support plate 14 by fastening screws 6. If desired, an adhesive may be used in combination for fixing the floor base plate 3 to the support plate 14. The board cushioning material 4 is fixed to the upper surface of the floor base plate 3 by a fixing tool (not shown) such as a retaining screw or a nail. However, the portion of the board cushioning material 4 other than the recess 4 c maintains the surface contact state with the upper surface of the floor base plate 3 by the holding force of the retaining screw 6.

  The board cushioning material 4 mixes glass fibers into the gypsum core material, and inserts and embeds glass fiber nonwoven fabrics (glass tissue) 41 and 42 on both front and back surfaces of the gypsum core material. It is a fiber reinforced gypsum board (glass fiber nonwoven gypsum board) containing a glass fiber nonwoven fabric that is reinforced. The embedding depth of the glass fiber nonwoven fabrics 41 and 42 is set to about 0.5 mm to several mm. The board-type cushioning material 4 is a gypsum-based face material having a structure representing a base material in which the glass fiber nonwoven fabrics 41 and 42 are concealed as described above, and the gypsum core material is exposed on the upper and lower surfaces of the board-type cushioning material 4. Therefore, there is no paper such as board base paper on the surface (lower surface) of the board cushioning material 4 facing the screw head portion 6b, and there is also woody material or pulp like the surface of the particle board. Without, the surface of the plaster material is only exposed directly. As a gypsum board containing glass fiber nonwoven fabric, Yoshino Gypsum Co., Ltd. product “Tiger Glass Rock” (product name) can be mentioned.

  Thus, when the board-type buffer material 4 which does not have paper or a woody material on the surface or surface layer is used, the generation | occurrence | production of the rubbing sound resulting from the densification of a structure | tissue does not arise, Therefore, the floor noise phenomenon by a rubbing sound can be avoided. This has been proved by experiments of the present inventors.

  In order to investigate this cause, the present inventor used a rubber hardness meter (TECLOCK GS-720G (Type D)) according to JIS K 6253: 2006 to surface the above-mentioned gypsum board with glass fiber nonwoven fabric. While measuring the hardness, the surface hardness of building material boards such as various gypsum boards and calcium silicate boards was measured. As a result, the surface hardness of the exposed surface of the gypsum core material is about 62, the surface hardness of the building material board such as gypsum board or calcium silicate board is over 65, and the surface hardness is over 65. It has been found that when the board building material is used as the board cushioning material 4, the above-mentioned rubbing noise is generated. That is, in order to prevent the generation of rubbing noise, the board buffer material 4 having a surface hardness of 65 or less obtained as a measurement value by a rubber hardness meter (type D) according to JIS K 6253: 2006 is used. It is desirable to form a surface with such a surface hardness on the board-type cushioning material 4, and the gypsum board with glass fiber nonwoven fabric, which is a gypsum-based face material from which the base material of the gypsum core material is exposed, meets such conditions.

  Thus, the floor structure of the present embodiment employs a gypsum plate with a glass fiber non-woven fabric provided with a lower exposed surface of the gypsum core material as the board cushioning material 4 so that the gypsum material is directly exposed on the lower surface. Therefore, according to such a floor structure, it is possible to prevent the generation of rubbing sound due to the densification of the structure of the lower surface of the board cushioning material and to effectively prevent the floor noise phenomenon.

  FIG. 5 is a longitudinal sectional view of a floor structure showing a second embodiment of the present invention. As a countermeasure for preventing such rubbing noise, the floor structure is subjected to a special surface treatment on the bottom gypsum board paper. The gypsum board which gave this is used as the board-type buffer material 4.

  The floor structure shown in FIG. 5 is the same as the floor structure shown in FIGS. 1 to 3 except that a special surface treatment is applied to the gypsum board base paper 4b on the lower surface side of the gypsum board constituting the board cushioning material 4. Have the same structure.

The inventor applies a two-part urethane acrylic paint containing an appropriate amount of silicone to the lower surface 4f of the lower gypsum board base paper 4b at a coating amount of 5.0 g / m ² and dries it, or A potassium stearate aqueous solution was applied over the entire surface with a potassium stearate coating amount of 8.0 g / m ² and dried, whereby a surface treatment film layer was formed on the lower surface 4f. The present inventor prepared a floor structure using a gypsum board subjected to such a surface treatment on the entire lower surface 4f as the board cushioning material 4, and generated a rubbing sound due to repeated action of the live load F. As a result of the proof test of the presence / absence of the present inventors, it has been found by experiments of the present inventor that such a floor structure does not generate a rubbing sound and can avoid a flooring phenomenon due to the generation of the rubbing sound.

  This is because such a surface-treated coating layer reduces the surface friction coefficient of the gypsum board base paper 4b and suppresses the generation of scratching noise caused by rubbing between the board base paper 4b and the screw head top surface 6a or the upper protruding region 3b. It is thought to do. Note that the reduction of the surface friction coefficient of the base paper 4b of the gypsum board is contrary to the concept of the conventional structure that attempts to prevent the relative horizontal displacement of the floor base material 3 and the board cushioning material 4 by using the friction between the face materials. However, the reduction of the surface friction coefficient of the gypsum board base paper 4b to such an extent does not actually impair the integrity of the floor base material 3 and the board cushioning material 4; Even if there is a problem in the integrity of the cushioning material 4, it can be adequately handled by increasing the number of fastening points by the retaining screw 6.

As a comparative example, the present inventor applied a two-component urethane acrylic paint containing an appropriate amount of silicone to the lower surface 4f of the lower gypsum board base paper 4b at a coating amount of 4.0 g / m ² and dried it. Alternatively, a one-component nitrocellulose-based paint is applied over the entire surface at an application amount of 4.5 g / m ² and dried, whereby a surface treatment film layer formed on the entire surface of the lower surface 4f is prepared and repeated active load The presence or absence of the generation of rubbing noise due to the action of F was similarly verified. However, in such a floor structure, rubbing noise is generated, so that the floor noise phenomenon due to the generation of rubbing noise is prevented. It was recognized that it was difficult.

The floor structure of the present embodiment is subjected to a surface treatment by applying a predetermined amount or more (5.0 g / m ² or more) of a two-component urethane acrylic paint or an aqueous potassium stearate solution to the lower surface 4f of the gypsum board base paper 4b. By adopting the gypsum board that has been used as the board cushioning material 4, the surface friction coefficient of the gypsum board base paper 4 b is reduced. According to such a floor structure, the flooring phenomenon due to rubbing noise is effective. Can be prevented.

  As a modified example, a planar resin coating layer such as an acrylic resin-based paint or a vinyl acetate resin-based paint may be formed on the lower surface 4f of the gypsum board base paper 4b, or the resin coating layer may be further embossed. You may give it. The thickness of such a resin coating layer is desirably set to a dimension of 0.2 mm or more, preferably 0.3 mm or more. Since the resin coating layer having such a thickness absorbs the screw head top surface 6a or the upper projecting portion of the upper projecting region 3b to some extent and reduces the effect of densification of the gypsum board base paper 4b, the gypsum board base paper 4b This effectively functions to suppress the depth h (FIGS. 1 and 3) of the depressions 4c and 4d to less than 0.2 mm. As described above, when the depth h of the recesses 4c and 4d is less than 0.2 mm, it has been found by the inventors' experiment that it is difficult for the floor noise phenomenon to occur. By forming the layer on the lower surface 4f of the gypsum board base paper 4b, the floor noise phenomenon can be effectively prevented.

  FIG. 6 is a longitudinal sectional view of a floor structure showing a third embodiment of the present invention. The floor structure uses a flexible sheet-like material 8 having deformation restoring property as a floor base plate as a measure for preventing rubbing noise. 3 and the board cushioning material 4.

  Resin such as 0.09 mm thick Teflon (registered trademark) sheet, 0.05 mm thick PP (polypropylene) sheet, 0.5 mm thick PE (polyethylene) sheet, 0.1 mm thick polyolefin sheet, etc. A sheet can be suitably used. Such a sheet-like object 8 contacts the screw head top surface 6a or the upward projecting region 3b, but the frictional force between the two is relatively small, so that it is difficult to generate a rubbing sound during relative displacement. As a modification, a relatively thick non-woven fabric or woven fabric having a thickness of 0.2 mm or more, preferably 0.3 mm or more, for example, a cloth gum tape may be used as the sheet-like material 8. Such a sheet-like material 8 absorbs the screw head top surface 6a or the upper projecting portion of the upper projecting region 3b to a certain extent and alleviates the effect of densification of the gypsum board base paper 4b. It functions effectively in suppressing the depth h (FIGS. 1 and 3) of 4c and 4d to less than 0.2 mm.

  As described above, the floor structure in which the sheet-like material 8 is interposed between the floor base plate 3 and the board cushioning material 4 does not generate a rubbing sound due to the densification of the structure. It has been found by experiments of the present inventor that the ringing phenomenon can be avoided.

  FIG. 7 is a longitudinal sectional view of a floor structure showing a fourth embodiment of the present invention. The floor structure is a board system in which a large number of linear or multi-point adhesives are used as a countermeasure to prevent rubbing noise. It is applied to the lower surface of the cushioning material 4 and has a configuration in which a large number of linear or multi-point coatings made of a cured adhesive are coated on the lower surface of the board-based cushioning material 4. The coated product 9 has a thickness of 0.2 mm or more, preferably 0.3 mm or more.

  In addition, as shown in FIG. 7, the floor structure of this example is the same as that of FIG. 1 to FIG. 3 except that a large number of linear or dotted coatings 9 are formed on the gypsum board base paper 4b on the lower surface side of the gypsum board. It has the same structure as the floor structure shown in FIG.

  As an adhesive for forming the coated product 9, an acrylic resin adhesive, a urethane resin adhesive, a vinyl acetate resin adhesive, an epoxy resin adhesive, a synthetic rubber adhesive, a latex adhesive, and the like are suitable. Can be used for The linear or dot-like coating 9 acts to reduce the contact area between the screw head portion 6b and the board base paper 4b.

  As a modification, an embossed sheet-like material may be interposed between the board cushioning material 4 and the floor base plate 3. As the base material (sheet) of such a sheet-like material, paper, polypropylene sheet, Teflon (registered trademark) synthetic paper such as YUPO (registered trademark), or non-woven fabric can be suitably used.

  In this way, a large number of linear or multi-point coated products 9 are formed on the lower surface of the board cushioning material 4 or an embossed sheet or the like is interposed between the board cushioning material 4 and the floor base plate 3. As for the inserted floor structure, it has been confirmed by experiments of the present inventor that the floor noise phenomenon due to the generation of rubbing noise can be avoided.

  The preferred embodiments and examples of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments and examples, and is within the scope of the present invention described in the claims. It is needless to say that various changes or modifications can be made in the above, and such changes or modifications are also included in the scope of the present invention.

  For example, although the said Example is related with the floor structure which uses a particle board as a floor foundation board, you may use board building materials, such as a hard board, a wood type plywood, MDF, and OSB, as a floor foundation board.

  Moreover, except for the above-mentioned Example 1 in which a gypsum plate having a lower exposed surface of a gypsum core material is used as a board-type cushioning material, ordinary hard gypsum board, sizing hard gypsum board, and structural gypsum board are used. Various plaster boards such as may be used.

  Furthermore, the sheet-like material inserted between the floor base plate and the board cushioning material may be attached in advance to the lower surface of the board cushioning material.

  The present invention supports the corner or edge of the floor base plate by the upper support plates of the support legs arranged on the floor slab, fixes the board cushioning material on the floor base plate, and places the floor cushion on the board cushion material. The present invention is applied to a double floor structure having a configuration in which a finishing material is further fixed.

DESCRIPTION OF SYMBOLS 1 Support leg 2 Underfloor space 3 Floor base plate 4 Board-type buffer material 5 Floor finishing material 6 Fastening screw 7 Joint 8 Sheet-like material 9 Linear or dot-like coating material C Concrete floor slab

Claims (10)

A corner base or an edge of a floor base plate is supported by an upper support plate of support legs arranged on a floor slab, a board cushioning material is fixed on the floor base plate, and a floor finishing material is placed on the board cushioning material. In a double floor structure having a structure in which
The board cushioning material comprises a gypsum-based face material having a gypsum core material, and the lower surface of the gypsum-based face material includes an exposed surface of the gypsum core material, a resin surface treatment film layer, a planar resin coating layer, A double floor structure comprising a point-like resin coating layer, an embossed resin coating layer, a number of linear resin coating layers, a resin sheet, a nonwoven fabric, a woven fabric, or an embossed paper or sheet. . A corner base or an edge of a floor base plate is supported by an upper support plate of support legs arranged on a floor slab, a board cushioning material is fixed on the floor base plate, and a floor finishing material is placed on the board cushioning material. In a double floor structure having a structure in which
The board-based cushioning material is composed of a gypsum-based face material having a gypsum core material, and a resin sheet, a nonwoven fabric, a woven cloth, or an emboss between the lower surface of the gypsum-based face material and the upper surface of the floor base plate. The double floor structure, wherein the processed paper or sheet is inserted into a region including at least the corners or edges.   The board cushioning material comprises a gypsum board containing a glass fiber nonwoven fabric in which a glass fiber nonwoven fabric is embedded on both front and back surfaces of a gypsum core material, and a surface layer portion is reinforced with a glass fiber nonwoven fabric, and the lower surface of the gypsum board is the gypsum The double floor structure according to claim 1, wherein an exposed surface of the core material is formed. Gypsum core exposed surface, resin surface treatment coating layer, planar resin coating layer, multi-point resin coating layer, embossed resin coating layer, many linear resin coating layers, resin sheet, nonwoven fabric, woven The lower surface of the cloth or embossed paper or sheet has a surface hardness of 65 or less obtained as a measured value by a rubber hardness meter (type D) according to JIS K 6253: 2006. 2. The double floor structure according to 2. A planar resin coating layer, a multipoint resin coating layer, an embossed resin coating layer, a number of linear resin coating layers, a resin sheet, a non-woven fabric, a woven fabric, or an embossed paper or sheet is 0. The double floor structure according to claim 1, wherein the double floor structure has a thickness of 2 mm or more. The surface treatment film layer, the resin coating layer or the resin sheet forming the lower surface of the gypsum-based face material, or the resin sheet interposed between the lower surface of the gypsum-based face material and the upper surface of the floor base plate, The double floor structure according to claim 1, wherein the double floor structure has a lower surface friction coefficient than the base paper for gypsum board.   The board buffer material is a gypsum board formed by coating and molding both sides of a gypsum core material with a gypsum board base paper, and the bottom side gypsum board base paper constituting the bottom surface of the gypsum base material has a resin paint Alternatively, the surface treatment is performed by application of stearates, and the surface treatment film layer having a lower surface friction coefficient than the base paper for gypsum board is formed on the lower surface of the gypsum board. Double floor structure as described. As the resin paint or stearates, a two-component urethane acrylic paint or an aqueous potassium stearate solution having a coating amount of 5.0 g / m ² or more is applied to the surface of the base paper on the lower surface side. The double floor structure according to claim 7.   The board-based cushioning material is a gypsum board formed by coating both sides of a gypsum-based core material with a gypsum board base paper, and the bottom side gypsum board base paper has a resin-based adhesive, a synthetic rubber-based adhesive or A latex or linear coating of latex adhesive is applied, and the coating forms the multipoint resin coating layer or the linear resin coating layer having a thickness of 0.2 mm or more. The double floor structure according to claim 1.   7. A Teflon (registered trademark) sheet, a polypropylene sheet, a polyethylene sheet, or a polyolefin sheet as the resin sheet is interposed between the lower surface of the gypsum-based face material and the upper surface of the floor base plate. A double floor structure as described in 1.

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