Method for preventing or reducing floor squeak

Abstract

To establish technology capable of more effectively preventing or reducing sound such as floor squeaks and floor creaks compared to conventional technology.SOLUTION: A method for preventing or reducing floor squeaks in a floor structure having a floor part including at least one planar member (X) and at least one support member (Y) directly or indirectly supporting the floor part from below, and consisting of a plurality of members, comprises (c) spraying liquid adhesive by using liquid adhesive spraying means onto an overlapping part of at least two members in contact or close contact to each other, or at least a portion of a contact part or close-contact part, and bonding and fixing the at least two members.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a method for preventing or reducing floor squeal in a building or floor structure. [Background technology]

[0002] Needless to say, buildings such as houses include, as structural elements, floor structures that form floors within the building. Such floor structures are generally composed of planar materials such as floor underlayment, surface materials, or finishing materials, and a number of supports that support them. More specifically, floors and underlayment structures for houses and the like are constructed using various methods such as joist construction, joist-less construction, floor placement (dry double floor), rolled joist underlayment, and wooden frame underlayment, and these floor structures generally have a structure in which planar materials such as floor underlayment, surface materials, and finishing materials are supported from below by supports such as joists, joists, or beams, and each member that is in contact with or adjacent to each other is fixed to each other with fasteners such as various nails and staples, and is bonded and fixed using adhesives as necessary.

[0003] In floor structures composed of a planar material and a number of supports supporting it as described above, problems with noise such as creaking and squeaking can often occur due to improper assembly of the planar material and the supports, poor adhesion / fixing, and deformation and changes over time of each component. Various methods are known for preventing such noise.

[0004] For example, Patent Document 1 describes a floor creaking prevention method in which, in a floor and underfloor structure in which a floor underlayment and a surface material are layered in sequence on top of floor joists, an injection needle connected to an adhesive pressure-feeding means is used, and this injection needle is penetrated in the thickness direction of the surface material that is attached to the surface of the floor underlayment, and an adhesive such as a two-part mixed reactive epoxy adhesive is injected through this needle into the overlapping surface between the floor underlayment and the surface material.

[0005] Furthermore, Patent Document 2 describes a method for preventing floor creaks, which prevents creaks from occurring between components of a floor structure, and is characterized in that a conductive passage is formed that extends from the floor material of the floor structure to the creaking area between the components, and a low-viscosity cyanoacrylate adhesive is injected through the conductive passage and hardened in a short period of time to bond and fix the components at the creaking area. Patent Document 2 explains that creaking occurs specifically in the following locations: between pillars and beams, joists, flooring, baseboards, between beams and joists, between joists and flooring, between flooring materials, between flooring materials themselves, between joist feet and plywood (floor underlayment), between plywood and flooring, and between each component including the hidden nails that secure both the joists and flooring materials or the plywood and flooring materials. The method involves forming a conductive path that reaches these creaking locations, and injecting the adhesive through this conductive path to bond and fix the components in the creaking locations, stopping movement between the components, thereby preventing floor creaking. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP2-213567 [Patent Document 2] Patent Publication No. 10-205042 Summary of the Invention [Problem to be solved by the invention]

[0007] The above-mentioned conventional technology forms through holes that reach the parts between which floor creaks or creaks occur, injects adhesive between the parts through the through holes, and allows the adhesive to harden to stop the movement between the parts, thereby preventing floor creaks and creaks. However, as a result of the inventor's previous attempts at applying the above-mentioned conventional technology, there were many cases in which floor creaks and creaks could not be sufficiently prevented. Therefore, the inventor has set a new challenge to establish a technology that can more effectively prevent or reduce noises such as floor creaks and creaks compared to conventional technology.

[0008] In order to solve the above-mentioned problems, the present inventors have thoroughly investigated methods of applying adhesive between components that cause floor creaking and squeaks. As a result, the present inventors have discovered that by adopting a method of spraying liquid adhesive onto overlapping, contacting or adjacent parts of at least two components that come into contact with each other in a floor structure, it is possible to more effectively prevent or reduce noise such as floor creaking and squeaks compared to conventional techniques. The present invention was completed based on this discovery. [Means for solving the problem]

[0009] That is, according to the present invention, the following is provided. [1] A floor structure including at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor from below, and is composed of multiple members, (c) spraying a liquid adhesive onto at least a portion of an overlapping portion, a contact portion, or an adjacent portion of at least two members that are in contact with or adjacent to each other using a liquid adhesive spraying means, thereby adhering and fixing the at least two members; 13. A method for preventing or reducing floor squeaks, comprising:

[0010] [2] The at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting the lower portion thereof, The method according to [1], in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping, contact or adjacent portion between the floor portion and the one or more support members (Y1), thereby adhesively fixing the floor portion to the one or more support members (Y1).

[0011] [3] The at least one support member (Y) directly or indirectly supports the floor portion from below and includes a plurality of support members stacked in the vertical direction, The method according to [1] or [2], wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping portion, contact portion, or adjacent portion of at least two of the plurality of support members that are in contact with each other, thereby adhesively fixing the at least two support members.

[0012] [4] The at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting its underside, and one or more support members (Y2) that support the one or more support members (Y1) by contacting their undersides and are fixed onto a base using fasteners; The method according to any one of [1] to [3], in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping, contacting or adjacent portions of the one or more support members (Y1) and the one or more support members (Y2), thereby adhering and fixing those support members.

[0013] [5] The method according to [4], in step (c), a liquid adhesive is sprayed using a liquid adhesive spraying means onto at least a portion of the overlapping portion, contact portion or adjacent portion between the fastener and the one or more support members (Y2), thereby adhering and fixing the fastener to the support member.

[0014] [6] The at least one planar member (X) is a laminate of at least two planar members, The method according to any one of [1] to [5], in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping portion, contact portion, or adjacent portion of two of the at least two planar members that are in contact with each other, thereby adhesively fixing the two planar members.

[0015] [7] In the floor structure, at least a portion of the at least one planar member (X) or the at least one support member (Y) is arranged adjacent to a lower side surface of one or more columns arranged in a building; The method according to any one of [1] to [6], in step (c), a liquid adhesive is sprayed using a liquid adhesive spraying means onto at least a portion of the overlapping, contacting or adjacent portion between at least a portion of the at least one planar member (X) or the plurality of support members (Y) and the lower side of the one or more columns, thereby adhesively fixing the at least a portion of the at least one planar member (X) or the plurality of support members (Y) to the lower side of the one or more columns.

[0016] [8] Before step (c), (b) forming a through hole in the floor structure in a thickness direction within a region where the overlapping portion, the contact portion, or the adjacent portion is present, the through hole reaching the overlapping portion, the contact portion, or the adjacent portion, where the liquid adhesive is sprayed in step (c); Further comprising: The method according to any one of [1] to [7], wherein in step (c), the liquid adhesive is sprayed onto at least a part of the overlapping portion, the contact portion, or the adjacent portion through the through hole.

[0017] [9] The at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting the lower surface thereof, The floor portion and the one or more support members (Y1) are fixed together by using a hidden fastener including a metal material, Prior to step (b), (a) locating the concealed fastener from above the floor using a metal detection means; Further comprising: In step (b), a position for forming the through hole is determined based on the position of the hidden fastener specified in step (a), and the through hole is formed. The method described in [8].

[0018]

[10] The method according to any one of [1] to [9], wherein in step (c), the liquid adhesive is sprayed onto the overlapping portion, the contact portion, or the adjacent portion from a predetermined position in the space under the floor.

[0019]

[11] Before step (c), (b) forming a through hole in the structure in a thickness direction thereof, the through hole communicating with the space under the floor, in an area where the overlapping portion, contact portion, or adjacent portion to which the liquid adhesive is sprayed in step (c) is not present; Further comprising: The method according to any one of [1] to

[10] , wherein in step (c), the liquid adhesive is sprayed onto the overlapping portion, the contact portion, or the adjacent portion through the through hole from a predetermined position in the space under the floor using the liquid adhesive spraying means.

[0020]

[12] The at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting the lower surface thereof, The floor portion and the one or more support members (Y1) are fixed together by using a hidden fastener including a metal material, Prior to step (b), (a) locating the concealed fastener from above the floor using a metal detection means; Further comprising: In step (b), a position for forming the through hole is determined based on the position of the hidden fastener specified in step (a), and the through hole is formed. The method described in

[11] .

[0021]

[13] The metal material in the concealed fastener includes a magnetic material; The method according to [9] or

[12] , wherein in step (a), the location of the hidden fastener is identified using a magnet as a metal detection means.

[0022]

[14] The method according to any one of [1] to

[13] , wherein the at least one support member (Y) includes a support member having a long, rectangular shape. In some embodiments, the at least one support member (Y) has a generally cubic, generally rectangular parallelepiped, generally cylindrical, generally prism-shaped, generally disk-shaped, generally log-shaped, or generally flat plate-shaped.

[0023]

[15] The method according to any one of [1] to

[14] , wherein the liquid adhesive is a cyanoacrylate adhesive.

[0024]

[16] The method according to any one of [1] to

[15] , wherein the viscosity of the liquid adhesive is 50 mPa·s or less.

[0025]

[17] The at least one support member (Y) is (i) a plurality of joists supporting the floor section in contact with its underside; and (ii) A plurality of joists, beams or girders supporting the plurality of joists at their lower portions; Including, The method according to any one of [1] to

[16] , wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping, contacting or adjacent portions between the floor portion and the plurality of floor joists, or onto at least a portion of the overlapping, contacting or adjacent portions between the plurality of floor joists and the plurality of joists, beams or girders, thereby adhering and fixing these two components.

[0026]

[18] The at least one planar member (X) includes a base material and a surface material or finishing material laminated thereon; The method according to any one of [1] to

[17] , wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping, contacting or adjacent portion between the base material and the surface material or finishing material, thereby adhering and fixing these two components.

[0027]

[19] The at least one planar member (X) includes a base material and a surface material or finishing material laminated thereon; The at least one support member (Y) is (i) a plurality of joists supporting the floor section in contact with its underside; and (ii) A plurality of joists, beams or girders supporting the plurality of joists at their lower portions; Including, In step (c), the liquid adhesive is sprayed onto at least one of the following (p) to (r) to adhere and fix each member, the method according to any one of [1] to

[18] : (p) at least a portion of the overlapping or contacting or adjacent portions of the floor section and the plurality of joists; (q) at least a portion of the overlapping, contacting, or adjacent portions of the plurality of joists and the plurality of joists or beams or girders; and (r) At least a portion of the overlapping, contacting or adjacent area between the base material and the surface material or finishing material.

[0028]

[20] The at least one planar member (X) includes a base material, a vibration-damping material and a surface material or a finishing material laminated in order on the base material, The at least one support member (Y) is (i) a plurality of joists supporting the floor section in contact with its underside; and (ii) A plurality of joists, beams or girders supporting the plurality of joists at their lower portions; Including, In step (c), the liquid adhesive is sprayed onto at least one of the following (p) to (s) to adhere and fix each member, the method according to any one of [1] to

[19] : (p) at least a portion of the overlapping or contacting or adjacent portions of the floor section and the plurality of joists; (q) at least a portion of the overlapping, contacting, or adjacent portions of the plurality of joists and the plurality of joists or beams or girders; and (r) at least a portion of the overlapping portion, contact portion, or adjacent portion between the base material and the vibration-damping material; and (s) At least a portion of the overlapping, contacting or adjacent area between the vibration control material and the surface material or finishing material.

[0029]

[21] The above-mentioned multiple joists, beams, or girders are fixed to the foundation, floor beams, or foundation using fasteners, The method according to

[19] or

[20] , comprising spraying the liquid adhesive onto at least one of the above (p) to (r) or (p) to (s) and the following (t) to adhere and fix each member: (t) At least a portion of the overlapping, contacting or adjacent portions between the plurality of joists, beams or girders and the fastener.

[0030]

[22] The method according to any one of [1] to

[21] , wherein the liquid adhesive spraying means is an adhesive pressure-feed spraying means capable of holding the liquid adhesive inside and spraying it outward.

[0031]

[23] The adhesive pressure-feeding and spraying means includes a tapered or needle-shaped spray nozzle or a spray needle as an adhesive spray member, The method according to

[22] , wherein the injection nozzle or injection needle has an injection port provided on its side, or the vicinity of the tip of the injection nozzle or injection needle where the injection port is provided is bent so that the injection port has a shape that is oriented perpendicularly or obliquely to the flow path direction of the injection nozzle or injection needle.

[0032]

[24] In the above floor structure, at least two adjacent members of the at least one planar member (X) and the at least one support member (Y) are fixed with metal fasteners, The method according to any one of [1] to

[23] , wherein in step (c), the liquid adhesive is sprayed onto an area where the metal fastener is located, as at least a part of the overlapping portion, contact portion, or adjacent portion.

[0033]

[25] The method according to any one of [1] to

[24] , wherein the liquid adhesive spraying means generates one or more linear sprays of the liquid adhesive. Effect of the Invention

[0034] According to the present invention, it is possible to effectively prevent or reduce creaking or squeaking that occurs in the floor structure of a building through simple work, in a short time, and at low cost. In addition, according to the present invention, since only minor processing that can be repaired is required without destroying the floor structure on a large scale, the appearance and design of the floor appearance after construction is not impaired. [Brief description of the drawings]

[0035] [Figure 1] FIG. 1 is an exploded perspective view showing a schematic example of an under-floor structure of a floor structure that can be the subject of construction of the present invention. [Diagram 2] FIG. 10 is a diagram showing a schematic diagram of another example of an under-floor structure of a floor structure that can be the subject of construction of the present invention. [Diagram 3] FIG. 11 is an exploded perspective view showing a schematic diagram of yet another example of an under-floor structure of a floor structure that can be the subject of construction of the present invention. [Figure 4] 1A to 1C are schematic diagrams illustrating various embodiments according to the present invention. [Diagram 5] FIG. 11 is a schematic diagram illustrating another embodiment of the present invention. [Figure 6] 1A to 1C are diagrams showing examples of the shapes of a spray nozzle or a spray needle of a liquid adhesive spraying means that can be used in an embodiment of the invention. [Figure 7] 3A to 3C are schematic diagrams illustrating examples of a spray nozzle or a spray needle of a liquid adhesive spray means that can be employed in an embodiment of the present invention, and an adhesive spray flow. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] According to the present invention, there is provided a method for preventing or reducing floor squeaks in a floor structure comprising a floor section including at least one planar member (X) and at least one support member (Y) directly or indirectly supporting the floor section from below, and which is composed of a plurality of members, the method comprising: (c) spraying liquid adhesive onto at least a portion of the overlapping portion, contact portion or adjacent portion of at least two members that are in contact with or adjacent to each other using a liquid adhesive spraying means, thereby adhering and fixing the at least two members. Below, each term will be explained, and specific examples of embodiments that can be employed in the present invention will be given.

[0037] As described above, the present invention is a method for preventing or reducing floor squealing, which is applied to a "floor structure including a floor section including at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor section from below, and which is composed of a plurality of members." More specifically, the method according to the present invention can be implemented in various buildings that include the floor structure as a structural element. However, the type of building is not limited, and the method according to the present invention can be applied to floor structures composed of rooms provided in buildings for various purposes such as detached houses, low-rise houses made of wood or light steel, residential apartments, and commercial facilities, and can also be applied to floor structures constructed and installed outdoors or in a specified space.

[0038] As described above, the object of the method of the present invention is not particularly limited as long as it has a configuration of "a floor structure including a floor section including at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor section from below, and is composed of a plurality of members." Typical examples include floor structures formed by various floor construction methods commonly used in the construction of various types of housing. Examples of such various floor construction methods include the joist-laying method, in which a floor structure is constructed by fixing a floor surface material (flooring material) to a base composed of joists or beams or girders, joists, and plywood (component panel), etc.; the joist-less method, in which a thicker base material such as plywood is used to reinforce the strength, thereby omitting joists and supporting the floor with joists or beams alone; the rolled floor method, in which joists are installed on a concrete slab via steel beams, and floor components such as floor panels and finishing materials are layered on top of the joists; the timber frame floor underlayment method, in which multiple joists are arranged at regular intervals on a floor slab via mortar, and then multiple joists are arranged on top of the joists so that they cross the joists, and the floor section is constructed on top of the joists; and the rolled joist underlayment method, in which joists are not used in the timber frame floor underlayment method, and multiple joists are placed directly on the floor slab via mortar, and the floor section is constructed on top of that.

[0039] More specifically, examples of floor structures to which the present invention is applied include floor structures having underfloor structures shown in Figures 1, 2(a) and (b), and 3(a) and (b), respectively. Below, several embodiments that can be adopted in the present invention will be shown by explaining floor structures having these underfloor structures. However, it should be noted that the present invention is not limited to these embodiments.

[0040] The underfloor structure 10 shown in Fig. 1 employs the following structure. That is, foundations (square timbers) 3a, b are fixed with their longitudinal sides abutting on the upper periphery of a foundation 8 constructed on the ground, and columns 7 are installed at the corners of the foundation 8. Furthermore, in this underfloor structure, a foundation stone 9 is installed on the ground in the inner area of ​​the foundation 8 (building), a floor beam 6 is placed on the foundation stone 9, and a configuration is adopted in which one foundation 3a and floor beam 6 placed on the foundation 8 support a joist 5 placed on its upper part. A plurality of joists 2b are arranged at regular intervals between the upper side of the joist 5 and the upper side of a joist hanger 4 fixed to the inner side of the other foundation 3b, and further, an edge joist 2a is fixed with its longitudinal side abutting on the upper part of the foundation 3a.

[0041] Needless to say, the joist hanger 4 is fixed to the inner side of the base 3b so that its upper side is positioned at the same height as the upper side of the joists 5, whereby the upper sides of the multiple joists 2b are also configured to be positioned at the same height, and naturally the upper side of the edge joist 2a is also configured so that it is positioned at the same height as the upper side of the multiple joists 2b.

[0042] As a result, in a floor structure having an underfloor structure 10 as shown in FIG. 1, a smooth floor portion (not shown) is formed on a plurality of joists 2, and a floor structure that can be used for construction according to the present invention is constructed.

[0043] Although FIG. 1 shows one pillar 7 installed at a corner of the foundation 8, multiple pillars may be installed around the periphery of the foundation 8, and the outer edges of the floor formed on multiple joists inside the building may be positioned close to the inner sides of those pillars.

[0044] Next, the configuration of the underfloor structure (underfloor structure) 100 shown in Figures 2(a) and (b) will be described. Note that Figure 2(a) is an exploded perspective view of the underfloor structure 100, in which the floor portion is mainly removed from the underfloor structure, as an example, and Figure 2(b) is a vertical cross-sectional view of a part of the underfloor structure in which the floor portion is formed on the upper part of the underfloor structure 100.

[0045] 2(a) and (b) is an underfloor structure constructed by a rolling floor construction method. Specifically, a plurality of joists 5 are arranged at regular intervals on a flat concrete slab (floor slab) 108 via backing mortar 106 as a floor height adjustment material, and a plurality of joists 102 are arranged on top of the backing mortar 106 at regular intervals so as to intersect with the joists 5 approximately perpendicularly. Since the backing mortar 106 is used as a floor height adjustment material as described above, the upper side surfaces of the plurality of joists 102 are arranged so as to be positioned at the same height.

[0046] As a result, even in the floor structure having the underfloor structure 100 shown in Figures 2(a) and (b), a smooth floor portion (not shown) is formed on top of multiple joists 2, and a floor structure that can be used for construction according to the present invention is constructed.

[0047] Next, an underfloor structure 200 shown in FIG. 3(a) is an underfloor structure constructed by a floor joist or beam construction method, and this underfloor structure is mainly used in narrow spaces such as corridors.

[0048] In this underfloor structure 200, as shown in Figure 3(a), two girders or beams 205 are each arranged parallel to the longitudinal direction at a fixed interval and fixed to a pillar 7 or the like, and a number of joists 2 are placed and fixed on the upper side surfaces of the girders or beams 205, intersecting perpendicularly with the girders or beams 205 in the longitudinal direction and parallel to each other at fixed intervals.

[0049] Then, flat floor components such as floor underlayment, floor surface material, and finishing material are stacked and fixed onto a number of joists 2 placed on the upper side surfaces of the two girders or beams 205 to form a floor section (not shown), thereby constructing a floor structure that can be used for construction according to the present invention.

[0050] Next, the underfloor structure 300 shown in Fig. 3(b) is an underfloor structure constructed by the assembled floor construction method. When the interval between beams becomes large, it is necessary to construct the floor structure by assembling large and small beams in order to ensure sufficient strength of the floor structure. This construction method of constructing a floor by assembling large and small beams is generally called the assembled floor construction method, and this construction method is mainly used for relatively large spaces on the second floor or higher of a building.

[0051] In the underfloor structure 300, as shown in FIG. 3(b), two or more girders 205 are fixed to columns 7 or the like in a mutually perpendicular arrangement, and multiple small girders 205b that receive multiple joists from above are fitted into fitting portions (notches) formed in the upper part of the other girders 205a. The multiple small girders 205b are arranged parallel to one girders 205a and at regular intervals. In addition, it goes without saying that the upper side surfaces of the multiple small girders 205b and the upper side surface of the girders 205a are configured to be at the same height, and multiple joists 2 are arranged and fixed parallel to each other and at regular intervals on the upper side surfaces of the multiple small girders 205b and the girders 205a.

[0052] Then, flat floor components such as floor underlayment, floor surface material, and finishing material are stacked and fixed onto a number of joists 2 placed on top of the main beams 205a and minor beams 205b to form a floor section (not shown), thereby constructing a floor structure that can be the subject of construction according to the present invention.

[0053] As described above, examples of floor structures to be constructed according to the present invention and various members that can constitute the same have been described with reference to Figs. 1, 2(a) and (b), and 3(a) and (b). The term "multiple members" constituting the floor structure to be constructed according to the present invention includes, as described above, a floor section including at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor section from below. Examples of the planar member (X) constituting the floor section include base materials such as plywood and plywood, vibration-damping materials, surface materials, and finishing materials. In addition, in the examples of underfloor structures shown in Figs. 1, 2(a) and (b), and 3(a) and (b), respectively, the "multiple members" include support members (Y) such as joists, joists, joist supports, edge joists, beams, girders, columns, floor beams, foundation stones, support mortar, floor height adjustment materials, foundations, and concrete slabs.

[0054] Furthermore, the above-mentioned "multiple members" is not limited to the various members mentioned above, but is a concept that includes all elements that make up the floor structure, and includes, for example, pillars that are arranged within or around the area of ​​the floor portion, as well as fasteners that fix or secure two or more members to each other.

[0055] Such fasteners include various fasteners that secure at least one member (e.g., plywood) that constitutes a floor section or the lower part of a floor section to a support that directly or indirectly supports it (e.g., joists, joist hangers, joists, joists, floor support beams), and fasteners that secure at least two supports (e.g., at least two of joists, joists, beams, girders, foundations, and concrete slabs) to each other.

[0056] The type of fastener is not particularly limited, but examples include nails, screws, clamps, staples, support hardware for each component (for example, joist support hardware, main support hardware), and fixing hardware such as hold-down hardware, etc. In addition, the material of the fastener in the floor structure is also not particularly limited, and for example, one of various materials including wood, resin, metal, and magnetic material may be used, or a combination of multiple types may be used.

[0057] In addition, the fasteners that secure the floor portion are not limited to fasteners whose upper part is visible from the floor portion, but also include fasteners that secure a planar member to a lower support body inside the floor portion (i.e., "hidden fasteners").

[0058] Furthermore, the meaning of the term "directly or indirectly supports" in "a floor section including at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor section from below" is explained as follows. That is, in the above term, "at least one support member (Y) that directly supports" is a concept that can include joists and edge joists that directly support the floor section by abutting its lower part in the example of the underfloor structure shown in Figure 1, Figures 2(a) and (b), and 3(a) and (b), respectively, while "at least one support member (Y) that indirectly supports" is a concept that can include other support members that realize a support structure that directly supports the floor section, such as joists, joist supports, columns, foundations, floor beams, foundation stones, foundations, concrete slabs, beams, girders, and backing mortar (floor height adjustment material).

[0059] The meaning of the term "overlap, contact, or adjacent portion of at least two members that are in contact with or close to each other" in step (c) is the overlap, contact, or adjacent portion of at least two members that are in contact with or close to each other among the above-mentioned "multiple members" that make up the floor structure, and includes any portion suspected of having a defect that may cause floor creaking, or any portion that is targeted to prevent it from becoming a cause of floor creaking in advance. In this regard, "overlap, contact, or adjacent portion of at least two members that are in contact with or close to each other" can be interpreted literally and includes the overlap, contact, or adjacent portion of at least two members that are in contact with or close to each other among the various members that make up the floor structure, and more specifically, includes, for example, the following (i) to (vii).

[0060] (i) An overlapping portion, contact portion or adjacent portion between the floor portion and one or more support members (Y1) that contact or are adjacent to the lower portion of the floor portion and directly or indirectly support the floor portion; (ii) The vicinity or contact area between a floor and a member that is in contact with or adjacent to the floor (for example, the vicinity or contact area between a floor and a column located on the periphery or inside of the floor); (iii) Among at least one support member (Y) that directly or indirectly supports the floor section, the overlapping portion, contact portion, or adjacent portion of at least two support members that are in contact with or adjacent to each other; (iv) In a configuration in which a floor portion or at least one planar member (X) constituting a floor portion and at least one support (Y) are fixed by at least one fastener, at least two overlapping portions, contact portions, or adjacent portions of the floor portion or at least one planar member, the at least one support (Y), and the at least one fastener; (v) Among at least one support member (Y) that directly or indirectly supports the floor portion, in a configuration of at least two support members fixed to each other by at least one fastener, the at least one fastener and at least two overlapping or contacting or adjacent portions of the at least two support members; (vi) In a structure in which the floor portion is formed by stacking a plurality of planar members (X), at least two overlapping portions, contact portions, or adjacent portions of the planar members (X); (vii) In a structure in which the floor portion is formed by stacking a plurality of planar members (X) and at least two of the plurality of planar members (X) are fixed by at least one fastener, the overlapping portions, contact portions, or adjacent portions of the plurality of planar members (X) and at least two of the fasteners.

[0061] In some embodiments, the "overlapped portion, contact portion, or adjacent portion of at least two members" in step (c) may include an overlapped portion, contact portion, or adjacent portion of at least two members that are in contact with or adjacent to each other and are selected from the group consisting of floor components (e.g., underlayment materials such as plywood or composite panels, seismic damping materials, surface materials, finishing materials, cushion sheets, floor sheets, tatami mats, synthetic tatami mats, and carpets), joists, joists, joist hangers, edge joists, beams, girders, columns, floor beams, foundation stones, backing mortar, floor height adjustment materials, foundations, concrete slabs, and fasteners.

[0062] In a specific embodiment, the method of the present invention may further include, prior to step (c), (b) forming a through hole in the floor structure in a predetermined area in which the above-mentioned "overlap portion, contact portion, or adjacent portion" in step (c) is present, in the thickness direction of the floor structure, the through hole reaching the overlap portion, contact portion, or adjacent portion. In this case, in step (c), liquid adhesive is sprayed onto at least a portion of the overlap portion, contact portion, or adjacent portion through the through hole.

[0063] Furthermore, as described above, when step (b) is provided prior to step (c), in step (c), a form is adopted in which liquid adhesive is sprayed onto at least a portion of the overlapping portion, contact portion, or adjacent portion of the at least two components through the through hole. More specifically, the liquid adhesive may be sprayed onto at least a portion of the overlapping portion, contact portion, or adjacent portion in the manner of (1) and / or (2) below.

[0064] (1) The through hole reaches the space under the floor, and a part of the liquid adhesive spraying means including a spray nozzle is inserted into the through hole from above the floor, and liquid adhesive is sprayed from a predetermined position in the space under the floor onto at least a part of the overlapping portion, contact portion, or adjacent portion: (2) The through hole reaches the overlapping portion, contact portion, or adjacent portion, and a portion of a liquid adhesive spraying means including an injection nozzle is inserted into the through hole from above the floor, and liquid adhesive is sprayed onto at least a portion of the overlapping portion, contact portion, or adjacent portion on the inner side of the through hole.

[0065] Furthermore, in a specific embodiment, in the case of a floor structure in which a floor portion and at least one support member located below it are fixed using a hidden fastener containing a metal material, the method of the present invention may further include, prior to step (b), (a) identifying the position of the hidden fastener from above the floor portion using various metal detection means.In this case, in step (b), the position for forming the through hole can be determined based on the position of the hidden fastener identified in step (a), and the through hole can be formed.

[0066] Furthermore, in the case of a floor structure in which a floor portion and at least one support member located below it are fixed using a hidden fastener containing a magnetic material, the method of the present invention may further include, prior to step (b), (a) identifying the position of the hidden fastener from above the floor portion using a magnet as a metal detection means.In this case, in step (b), the position for forming the through hole can be determined based on the position of the hidden fastener identified in step (a), and the through hole can be formed.

[0067] In the method according to the present invention, the liquid adhesive sprayed onto at least a part of the overlapping portion, contact portion, or adjacent portion in step (c) is not particularly limited as long as it is liquid and does not interfere with spraying onto the overlapping portion, contact portion, or adjacent portion, and with the adhesion of the components by the adhesive, and with preventing or reducing floor squeaking, but from the viewpoint of ease of operation, it is preferable to use a cyanoacrylate adhesive, which is a so-called instant adhesive. Cyanoacrylate adhesives are adhesives in which the monomer, which is the main component, reacts with moisture present on the surface of the adherend or in the air around it, rapidly hardens, and becomes a polymer, which strongly bonds the adherends to each other.

[0068] Examples of cyanoacrylate adhesives include those containing methyl-2-cyanoacrylate, ethyl-2-cyanoacrylate, n-butyl cyanoacrylate, etc. as the main component monomer, and commonly available products include the Quick Bond series (manufactured by Kansai Polymer Research Institute Co., Ltd.).

[0069] Furthermore, in step (c), the liquid adhesive is sprayed onto at least a part of the overlapping portion, the contact portion, or the adjacent portion by using a liquid adhesive spraying means. Therefore, in order to make this spraying operation relatively easy and to improve the state in which the liquid adhesive is sprayed onto at least a part of the overlapping portion, the contact portion, or the adjacent portion, the upper limit of the viscosity of the liquid adhesive used in the present invention is, for example, 400 mPa s or less, 300 mPa s or less, 250 mPa s or less. , 100 mPa·s or less, 90 mPa·s or less, 80 mPa·s or less, 70 mPa·s or less, 60 mPa·s or less, preferably 50 mPa·s or less, 40 mPa·s or less, 30 mPa·s or less, 20 mPa·s or less, more preferably 15.0 mPa·s or less, 10.0 mPa·s or less, even more preferably 9.0 mPa·s or less, 8.0 mPa·s or less, 7.0 mPa·s or less, 6.0 mPa·s or less, particularly preferably 5.5 mPa·s or less, and most preferably 5.0 mPa·s or less. The viscosity of a liquid adhesive is naturally determined by its composition and physical properties, and adhesives with lower viscosity are preferably used; therefore, the lower limit of the viscosity is not particularly limited, and examples include 0.1 mPa·s or more, 0.2 mPa·s or more, 0.3 mPa·s or more, 0.4 mPa·s or more, 0.5 mPa·s or more, 0.6 mPa·s or more, 0.7 mPa·s or more, 0.8 mPa·s or more, 0.9 mPa·s or more, 1.0 mPa·s or more, 1.5 mPa·s or more, 2.0 mPa·s or more, 2.5 mPa·s or more, and 3.0 mPa·s or more.

[0070] In a particular embodiment, in step (c), a liquid adhesive (preferably a cyanoacrylate adhesive) having a viscosity within a numerical range that does not contradict one of the above-mentioned lower limit values ​​and one of the above-mentioned upper limit values ​​can be used.

[0071] In a more preferred embodiment, a commercially available cyanoacrylate adhesive may be used in step (c). An example of a commercially available cyanoacrylate adhesive is Quickbond EL (Kansai Polymer Research Institute Co., Ltd., viscosity 3 to 5 mPa s). However, the liquid adhesive that can be used in the present invention is not limited to this.

[0072] By using a low-viscosity liquid adhesive as described above, it is possible to avoid problems such as clogging of the liquid adhesive in the liquid adhesive spraying means, and a preferable spray flow of the liquid adhesive can be achieved, resulting in a good adhesion state of at least two components in at least a part of the overlapping portion, contact portion or adjacent portion, thereby reliably preventing or reducing floor squealing.

[0073] In a specific embodiment, in order to accelerate the curing of the liquid adhesive sprayed and applied to at least a part of the overlapping portion, contact portion, or adjacent portion in step (c), an adhesive curing accelerator may be applied to at least a part of the overlapping portion, contact portion, or adjacent portion. More specifically, as described above, a cyanoacrylate adhesive (instant adhesive) is an adhesive in which the main component monomer reacts with moisture to rapidly cure and become a polymer, and strongly bonds the adherends to each other. However, when there is little moisture present on the adherend surface or in the air around it, and sufficient curing of the adhesive cannot be obtained in a relatively short time, an adhesive curing accelerator may be used. As such adhesive curing accelerators, for example, acetone-based, cyclopentane-based, alcohol-based, and other adhesive curing accelerators are known and are distributed as commercially available products, so that an appropriate one may be selected and used after considering the properties and erosiveness of each type of adhesive curing accelerator.

[0074] In addition, the timing for applying the adhesive curing accelerator to the object to be adhered is generally such that the liquid adhesive is sprayed onto at least a portion of the overlapping portion, contact portion or adjacent portion in step (c) and then the adhesive curing accelerator is applied to at least a portion of the overlapping portion, contact portion or adjacent portion. However, as long as the desired accelerated curing is obtained, the timing of application of the adhesive curing accelerator is not important, and the adhesive curing accelerator may be applied before or after step (c) and / or simultaneously with step (c). However, it should be noted that the application of an adhesive curing accelerator is not an essential element in the present invention.

[0075] In step (c), the liquid adhesive is sprayed onto at least a part of the overlapping portion, contact portion, or adjacent portion by using a liquid adhesive spraying means. Any liquid spraying means capable of spraying the liquid adhesive onto the overlapping portion, contact portion, or adjacent portion of the at least two targeted members of the floor structure may be used as the liquid adhesive spraying means. Examples of the liquid adhesive spraying means include, but are not limited to, a liquid spraying means including an adhesive pressure-feeding spraying means capable of holding the liquid adhesive inside and spraying it outward, and a liquid spraying nozzle or liquid spraying needle as an adhesive spraying member. As such a liquid spraying means, for example, a syringe pump that is distributed for medical or industrial purposes and a spraying needle or injection needle that is distributed for the same purpose may be used in any combination.

[0076] For example, an example of a syringe needle that is widely used for medical purposes is one having the configuration shown in FIG. 6(a), and such a syringe needle may be used as a component constituting the adhesive pressure-feeding and ejecting means.

[0077] Furthermore, in a liquid adhesive spraying means configured by combining a syringe pump and a spray needle or injection needle, a spray nozzle, spray needle or injection needle processed into a predetermined shape may be used in order to control the spray direction of the liquid adhesive to a desired direction, taking into consideration the position of at least a part of the overlapping portion, contact portion or adjacent portion where the liquid adhesive is sprayed in step (c) and constraints due to the surrounding structure.

[0078] For example, as shown in Fig. 6(b), a liquid adhesive spraying means may be used that includes a spray nozzle, a spray needle, or a syringe needle with a spray port and a tip of about 1 to 2 mm bent horizontally as the adhesive spraying means. Furthermore, in another embodiment, as shown in Fig. 6(c), a liquid adhesive spraying means may be used that includes a spray nozzle, a spray needle, or a syringe needle with a hole on the side that serves as the adhesive spray port. Note that, in the example shown in Fig. 6(c), one hole that serves as the adhesive spray port is provided, but a spray nozzle, a spray needle, or a syringe needle with multiple holes (adhesive spray ports) may be used as the adhesive spraying means.

[0079] Furthermore, in a specific embodiment, when spraying the liquid adhesive to the overlapping portion, contact portion, or adjacent portion using a liquid adhesive spraying means in step (c), a method is preferably adopted in which one or more linear jet streams S are generated from a spray nozzle or spray needle N, and at least a part of the one or more linear jet streams are sprayed to the overlapping portion, contact portion, or adjacent portion, as shown in Figures 7(a) and 7(b), though this is not particularly limited. For example, as long as the liquid adhesive spraying means is configured by arbitrarily combining a liquid pressure-feeding means such as a syringe pump and an elongated spray nozzle or spray needle as described above, one or more linear jet streams of liquid adhesive can be generated as described above, and therefore a liquid adhesive spraying means configured in this manner can be preferably used. In addition, by appropriately adjusting the pressure applied by the adhesive pumping means, the number of linear spray streams of adhesive generated can also be controlled. Also, by pumping the adhesive at a relatively high pressure, the number of linear spray streams increases and a mist of adhesive can be generated around it, so the pressure of the pumping can be controlled according to the desired spray pattern of the adhesive.

[0080] Furthermore, in certain embodiments, the method of the present invention includes, after steps (b) and (c), a step of repairing the through hole in the floor portion formed in step (b) using various floor repair materials.

[0081] A more specific embodiment will be described below with reference to FIGS. 4(a), (b), (c) and FIG. 5. Figure 4(a) shows a schematic diagram of a floor structure in which the lower part of a floor section 11 is fixed to a joist (support member) 2 located below with a metal fastener T. Since it is suspected that floor creaking is occurring due to poor fixation at the overlapping part, contact part or adjacent part of the lower part of the floor section 11, the metal fastener T and the joist 2, an embodiment is shown in which liquid adhesive is sprayed onto the overlapping part, contact part or adjacent part using a liquid adhesive spraying means A to prevent or reduce floor creaking.

[0082] More specifically, in an area where a fixing defect is suspected in the overlapping or contacting portion or adjacent portion of the metal fastener T and the joist 2, the position and arrangement of the metal fastener T or the joist 2 are identified using a magnet (not shown). With reference to the position and arrangement of the metal fastener T or the joist 2 thus identified, a through hole P in the floor is formed using a cutting means such as a drill at a position on the floor that is a predetermined distance (for example, 5 to 10 cm) away from the point on the upper part of the joist 2 (the area where the fastener 2 is located at the upper part) where floor creaking is confirmed, and the lower part is a space under the floor. Next, a predetermined amount of liquid adhesive is filled into a syringe pump P as an adhesive pressure-feeding means, and a spray nozzle or spray needle N with a tip of about 1 to 2 mm with a spray hole is attached to the syringe pump P. Then, the spray nozzle or spray needle N is inserted into the through hole P, and the liquid adhesive filled in the syringe pump P is pressure-fed and sprayed onto the lower part of the floor part 11, the overlapping or contacting portion or adjacent portion of the metal fastener T and the joist 2. When the sprayed liquid adhesive hardens, each component adheres to the floor, preventing creaking. After that, the through hole P can be repaired using various floor repair materials.

[0083] Figure 4(b) shows an embodiment in which floor creaking is suspected to be caused by friction between the outer peripheral edge of floor section 11 and the adjacent pillar 7, so that liquid adhesive is sprayed using liquid adhesive spraying means A to the contact area or adjacent area between the outer peripheral edge of floor section 11 and the pillar under the floor, thereby preventing or reducing floor creaking. As in the embodiment of FIG. 4(a), in the area of ​​the floor surface near the pillar where floor creaking is confirmed, a floor through hole P is formed at a point a specified distance away from the side of the pillar using cutting means such as a drill, which reaches the space under the floor, and a spray nozzle or spray needle N of liquid adhesive spraying means A is inserted into the through hole P, and liquid adhesive filled in a syringe pump P is pumped and sprayed onto the contact area or nearby area between the outer periphery of the floor 11 and the pillar under the floor. The sprayed liquid adhesive hardens, fixing each component and preventing floor creaking. After that, the through hole P can be repaired using various floor repair materials.

[0084] Fig. 4(c) is a schematic cross-sectional view of an underfloor structure roughly corresponding to the underfloor structure shown in Fig. 2(a) and (b), specifically constructed by a rolling floor construction method. The embodiment shown in Fig. 4(c) is an embodiment that solves the problem of poor fixing between the joists 5, which function as an indirect support for the floor part, and the concrete slab 108, which is suspected to be the cause of floor creaking, rather than poor fixing of the floor part 11, the joists 2, and the fasteners that fasten them. Note that the joists 5 and the concrete slab 108 are fixed by fasteners T (metal bolts and nuts) as shown in Fig. 4(c).

[0085] As in Figures 4(b) and (c), a through hole P is formed in the floor section, reaching the space under the floor and located above the joists 11. An injection nozzle or injection needle N of the liquid adhesive injection means A is inserted into the through hole P, and the liquid adhesive filled in the syringe pump P is pumped and evenly sprayed into the area above the joists where the fasteners T are located by repeatedly tilting the syringe pump of the liquid adhesive injection means A in the horizontal direction. The sprayed liquid adhesive hardens, fixing each component and preventing floor squeaking. After that, the through hole P can be repaired using various floor repair materials.

[0086] FIG. 5 is a diagram for explaining an embodiment in which the method according to the present invention is applied to a floor structure constructed by the joist-less floor construction method. 5, floor squealing was suspected to be caused by poor fixing and fastening between the lower part of the joists 5, which directly supports the floor part 11 by contacting its lower part, and the upper part of the foundation packing 102a and steel bundle 102 placed on the foundation rise 8a. Therefore, liquid adhesive is sprayed to the overlapping part, contact part, or adjacent part between the lower part of the joists 5 and the upper part of the foundation packing 102a, and the overlapping part, contact part, or adjacent part between the lower part of the joists 5 and the upper part of the steel bundle 102, in a procedure similar to that shown in Fig. 4(a)-(c). Then, as the sprayed liquid adhesive hardens, the various components are fixed, preventing floor squealing.

[0087] Although the specific embodiments of the present invention have been described above in detail, the present invention is not limited to the above-mentioned embodiments. Various modifications, alterations, and arbitrary combinations of each configuration, element, and feature may be adopted within the scope of the present invention. In addition, the words "include" and "have" in the present invention do not exclude the presence of elements other than the elements referred to as objects by these words, unless otherwise specified, and these terms are used interchangeably. In addition, each component and each technical feature shown in each of the above-mentioned embodiments may be adopted in addition or as a substitute in each embodiment, unless there is a particular contradiction, and the embodiment by adopting each component and each technical feature in addition or as a substitute is explicitly stated in this specification. EXAMPLES

[0088] <Construction example 1: 30-year-old house (apartment)> This construction example is an example in which an embodiment of the present invention was constructed on a floor structure including a floor section using wooden flooring material on the surface and floor joists supporting the floor section from below. In the floor area where creaking was confirmed, a magnet was scanned from above the floor surface to identify the locations of the fasteners (metal nails) that secure the floor section, including the wooden flooring, to the joists.

[0089] Next, a through hole of about 2 mm was formed in the approximately vertical direction using a cutting drill at a point 10 cm horizontally from the point on the floor surface where the fastener (nail) was located underneath, as specified above. The through-hole is formed in a substantially vertical direction at a point on the floor about 5 to 10 cm away from the end (or core) of the floor joist, and reaches the space under the floor.

[0090] As adhesive injection means, a medical syringe (5 mL, manufactured by JMS Co., Ltd.) and a shaped injection needle (12-18 gauge, manufactured overseas) were prepared. The tip of the injection needle was bent approximately 1-2 mm into a direction perpendicular to the longitudinal direction of the injection needle (Fig. 6(b), Fig. 7(a) and (b)).

[0091] The syringe was filled with a cyanoacrylate-based liquid adhesive, Quickbond EL (viscosity: 3-5 mPa·s), the injection needle was connected, and the needle was inserted through the through-hole. The liquid adhesive was then sprayed from a specified position in the space under the floor toward the overlap or adjacent part between the floor joist and the floor material (flooring material) near the position where the floor creaking was confirmed.

[0092] The injection needle is bent approximately perpendicularly to its longitudinal direction near the tip, and when the adhesive is pushed out by the syringe pump, depending on the pushing force (extrusion pressure), multiple linear jets of adhesive are generated in approximately horizontal and / or approximately diagonal upward and downward directions on the side where the injection needle nozzle is located, and the linear jets are sprayed onto the area between the two target components (the overlapping part, contact part, or adjacent part).

[0093] As mentioned above, adhesive was sprayed onto the overlapping parts or adjacent parts of the floor structure and the floor joists. After 30 seconds, the occurrence of floor creaking was checked. The creaking that had been present before construction had completely disappeared. The method according to this construction example is a method of forming a through hole in the floor surface on the side of the joist, and spraying the liquid adhesive from the side of the overlapping or adjacent part of both members between the joist and the floor, where fasteners (metal nails) that fix the plywood member of the floor to the joist from above penetrate both members. In this respect, the method according to this construction example essentially adopts a method of spraying the adhesive toward the gap that may exist in the overlapping or adjacent part and the side of the penetration part of the fastener. And, as can be seen from the result that the floor creaking completely disappeared after construction, it is considered that the poor adhesion and fixation between the joist and the floor by the metal fastener caused friction between the metal fastener and the adjacent plywood member or the joist, which caused the floor creaking. Furthermore, in this construction example, the overlapping or adjacent parts between the plywood member and the joist, as well as the area including a part of the metal fastener that penetrates the overlapping or adjacent parts, are fixed with adhesive, thereby preventing friction between the metal fastener and the adjacent plywood member or joist, and it is believed that this eliminated the creaking of the floor.

[0094] <Construction example 2: 40-year-old house (apartment)> This construction example is an example of an embodiment of the present invention being installed on a floor structure including a floor section (with plywood at the bottom) using a polyvinyl chloride cushion flooring sheet as the surface material and floor joists supporting this from below. In the floor area where floor creaking was confirmed, as in Construction Example 1, a magnet was scanned from above the floor surface where the cushioned flooring was located, and the positions of the fasteners (metal nails) that secure the floor section to the joists were identified.

[0095] Next, a through hole of about 2 mm was formed in the approximately vertical direction using a cutting drill at a point 10 cm horizontally from the point on the floor surface where the fastener (nail) was located underneath, as specified above. As in Construction Example 1, the through hole is formed in a substantially vertical direction at a point on the floor about 5 to 10 cm away from the end (or core) of the floor joist, and reaches the space under the floor.

[0096] As in Construction Example 1, the above-mentioned adhesive spraying means was used to spray a liquid adhesive, Quickbond EL (viscosity: 3 to 5 mPa·s), through the above-mentioned through hole from a predetermined position in the space under the floor, toward the overlap or adjacent part between the floor joist and the floor material near the position where the floor creaking was confirmed.

[0097] As mentioned above, adhesive was sprayed onto the overlapping parts or adjacent parts of the floor structure and the floor joists. After 30 seconds, the occurrence of floor creaking was checked. The creaking that had been present before construction had completely disappeared. In the method according to this construction example, fasteners (metal nails) that fix the plywood member to the joist from above are present at the overlapping portion or adjacent portion between the plywood member and the joist and penetrate both members. Therefore, in this construction example, the overlapping portion or adjacent portion and the area including the part of the metal fastener that penetrates the overlapping portion or adjacent portion are fixed with adhesive, which prevents friction between the metal fastener and the adjacent plywood member or joist, and is thought to eliminate the creaking of the floor.

[0098] <Construction example 3: 40-year-old house (apartment)> This construction example is of a case where a creaking floor was occurring not due to a defect in the fixing state between the floor section and the joists, but due to a defect in the fixing state between the joists and the foundation in the floor structure.

[0099] Initially, it was assumed that the floor creaking was caused by a defect in the fixing state between the floor and the joists, and liquid adhesive was sprayed on the overlapping part or the adjacent part of the floor and the joists in the same procedure as in construction example 1 to try to reduce the floor creaking, but the floor creaking did not disappear. In general, the sound quality of floor creaking caused by various causes varies depending on the cause, but the sound quality of floor creaking caused by a defect in the fixing state between the floor and the joists and the sound quality of noise caused by a defect in the fixing state of the joists tend to be similar, and since the sound quality was similar in this construction example, it was assumed that the joists located at the bottom near the area where the floor creaking was confirmed were defective and that this was the cause of the floor creaking. More specifically, since the house targeted in this construction example is an apartment building, it was assumed that the joists located at the bottom of the joists were fixed from above with fasteners such as bolts and nuts with a certain gap between them and the concrete slab located below them via height adjustment materials, and it was predicted that the floor creaking was caused by a defect in the fixing state of the joists by these fasteners (floor structure shown in Figure 2 (a)).

[0100] Taking into consideration the spacing (distance) of typical joists and beams, multiple 2mm through holes were formed sequentially at intervals of approximately 5cm from specified positions on the floor surface where the identified joists were located underneath near the area where the floor creaking was confirmed. A long, thin stainless steel rod was then inserted approximately vertically into the above through holes until its tip reached the lower component, and the height level was confirmed to form a through hole where the beam was predicted to be located underneath.

[0101] A syringe similar to that used in Construction Example 1 was filled with cyanoacrylate liquid adhesive Quickbond EL (viscosity: 3-5 mPa s), and an unshaped injection needle (overseas-made 12-18 gauge) was connected (Fig. 6(a)). The injection needle portion of this liquid adhesive pumping means was then inserted through the through-hole described above, and the syringe portion was repeatedly tilted horizontally above the floor toward the lower long area where the joists were expected to be located, and the liquid adhesive was sprayed evenly from a predetermined position in the space under the floor onto the top surface of the joists.

[0102] After applying the liquid adhesive as described above, we checked the occurrence of creaking in the floor 30 seconds later, and found that the creaking that had been present before application had completely disappeared. [Industrial Applicability]

[0103] The present invention has extremely high industrial applicability in the fields of architectural work, construction work, and renovation work. [Explanation of symbols]

[0104] 2, 102 Joist 2a Edge joist 2b Joist 3a, 3b Foundation 4. Joist installation 5. Pullout 6 floor bundle 7 Pillars 8 Basics 9. Foundation Stone 10, 100, 200, 300 Underfloor structure 11 Floor 106 Floor height adjustment material (joist support) 108 Concrete slab (foundation) 205 Beams or beams 205a girder 205b Small beam A Liquid adhesive spraying means (adhesive pressure-feeding spraying means) N Injection nozzle (injection needle) P Adhesive pressure delivery means (syringe pump)

Claims

1. A floor structure including at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor from below, the floor structure being composed of a plurality of members, (c) spraying a liquid adhesive onto at least a portion of an overlapping portion, a contact portion, or an adjacent portion of at least two members that are in contact with or adjacent to each other using a liquid adhesive spraying means, thereby adhering and fixing the at least two members; 13. A method for preventing or reducing floor squeaks, comprising:

2. The at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting the lower portion thereof, The method according to claim 1, wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping, contact or adjacent portion between the floor portion and the one or more support members (Y1), thereby adhesively fixing the floor portion to the one or more support members (Y1).

3. The at least one support member (Y) directly or indirectly supports the floor portion from below and includes a plurality of support members stacked in the vertical direction, The method according to claim 1, wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping, contacting or adjacent portions of at least two of the plurality of support members that are in contact with each other, thereby adhesively fixing the at least two support members.

4. The at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting its lower surface, and one or more support members (Y2) that support the one or more support members (Y1) by contacting their lower surfaces and are fixed onto a base using fasteners; The method according to claim 1, wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping, contacting or adjacent portions of the one or more support members (Y1) and the one or more support members (Y2), thereby adhesively fixing the support members.

5. The method according to claim 4, wherein in step (c), a liquid adhesive is sprayed onto at least a portion of the overlapping portion, contact portion or adjacent portion between the fastener and the one or more support members (Y2) using a liquid adhesive spraying means, thereby adhesively fixing the fastener and the support member.

6. The at least one planar member (X) is a laminate of at least two planar members, The method according to claim 1, wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping, contacting or adjacent portions of two of the at least two planar members that are in contact with each other, thereby adhesively fixing the two planar members to each other.

7. In the floor structure, at least a portion of the at least one planar member (X) or the at least one support member (Y) is arranged adjacent to a lower side surface of one or more columns arranged in a building; The method according to claim 1, wherein in step (c), a liquid adhesive is sprayed using a liquid adhesive spraying means onto at least a portion of the overlapping, contacting or adjacent portion between at least a portion of the at least one planar member (X) or the plurality of support members (Y) and the lower side of the one or more columns, thereby adhesively fixing the at least a portion of the at least one planar member (X) or the plurality of support members (Y) to the lower side of the one or more columns.

8. Prior to step (c), (b) forming a through hole in the floor structure in a thickness direction thereof, the through hole reaching the overlapping portion, the contact portion, or the adjacent portion, in a region where the overlapping portion, the contact portion, or the adjacent portion is present, where the liquid adhesive is sprayed in step (c); Further comprising: The method according to any one of claims 1 to 7, wherein in step (c), the liquid adhesive is sprayed onto at least a part of the overlapping portion, the contact portion or the adjacent portion through the through hole.

9. The at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting the lower surface thereof, The floor portion and the one or more support members (Y1) are fixed by using a hidden fastener including a metal material, Prior to step (b), (a) locating the concealed fastener from above the floor using a metal detection means; Further comprising: In step (b), a position for forming the through hole is determined based on the position of the hidden fastener specified in step (a), and the through hole is formed. The method according to claim 8.

10. The method according to any one of claims 1 to 7, wherein in step (c), the liquid adhesive is sprayed onto the overlapping portion, the contact portion or the adjacent portion from a predetermined position in the space under the floor.

11. Prior to step (c), (b) forming a through hole in the structure in a thickness direction thereof, the through hole communicating with the space under the floor, in an area where the overlapping portion, the contact portion, or the adjacent portion onto which the liquid adhesive is sprayed in step (c) is not present; Further comprising: The method according to claim 10, wherein in step (c), the liquid adhesive is sprayed onto the overlapping portion, contact portion or adjacent portion through the through hole from a predetermined position in the space under the floor using the liquid adhesive spraying means.

12. The at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting the lower surface thereof, The floor portion and the one or more support members (Y1) are fixed by using a hidden fastener including a metal material, Prior to step (b), (a) locating the concealed fastener from above the floor using a metal detection means; Further comprising: In step (b), a position for forming the through hole is determined based on the position of the hidden fastener specified in step (a), and the through hole is formed. The method of claim 11.

13. The metal material in the concealed fastener includes a magnetic material, 10. The method of claim 9, wherein in step (a), the hidden fasteners are located using a magnet as a metal detection means.

14. The method according to claim 1 , wherein the at least one support member (Y) comprises a support member having an elongated and block-shaped configuration.

15. The method of claim 1 , wherein the liquid adhesive is a cyanoacrylate adhesive.

16. The method of claim 1 , wherein the liquid adhesive has a viscosity of 50 mPa·s or less.

17. The at least one support member (Y) is (i) a plurality of joists supporting the floor section by contacting its underside; and (ii) A plurality of joists, beams or girders that support the plurality of joists in contact with their lower portions; Including, 2. The method according to claim 1, wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping, contacting or adjacent portions between the floor portion and the plurality of joists, or onto at least a portion of the overlapping, contacting or adjacent portions between the plurality of joists and the plurality of joists, beams or girders, thereby adhering and fixing these two components together.

18. The at least one planar member (X) includes a base material and a surface material or finishing material laminated thereon; 20. The method according to claim 1 or 17, wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping, contacting or adjacent portion between the base material and the surface material or finishing material, thereby adhesively fixing these two components together.

19. The at least one planar member (X) includes a base material and a surface material or finishing material laminated thereon; The at least one support member (Y) is (i) a plurality of joists supporting the floor section by contacting its underside; and (ii) A plurality of joists, beams or girders that support the plurality of joists in contact with their lower portions; Including, The method according to claim 1, wherein in the step (c), the liquid adhesive is sprayed onto at least one of the following (p) to (r) to adhere and fix each member: (p) at least a portion of the overlapping portion, contact portion, or adjacent portion between the floor portion and the plurality of joists; (q) at least a portion of the overlapping, contacting, or adjacent portions between the plurality of joists and the plurality of joists or beams or girders; and (r) At least a portion of the overlapping, contacting or adjacent area between the base material and the surface material or finishing material.

20. The at least one planar member (X) includes a base material, a vibration-damping material and a surface material or a finishing material laminated in order on the base material, The at least one support member (Y) is (i) a plurality of joists supporting the floor section by contacting its underside; and (ii) A plurality of joists, beams or girders that support the plurality of joists in contact with their lower portions; Including, The method according to claim 1, wherein in the step (c), the liquid adhesive is sprayed onto at least one of the following (p) to (s) to adhere and fix each member: (p) at least a portion of the overlapping portion, contact portion, or adjacent portion between the floor portion and the plurality of joists; (q) at least a portion of the overlapping, contacting, or adjacent portions between the plurality of joists and the plurality of joists or beams or girders; and (r) at least a portion of the overlapping portion, contact portion, or adjacent portion between the base material and the vibration-damping material; and (s) At least a portion of the overlapping, contacting or adjacent area between the vibration-damping material and the surface material or finishing material.

21. The plurality of joists, beams or girders are fixed to a foundation, a floor beam or a foundation using fasteners, The method according to claim 19 or 20, further comprising spraying the liquid adhesive onto at least one of the above (p) to (r) or (p) to (s) and the following (t) to adhere and fix each member: (t) At least a portion of the overlapping, contacting or adjacent portions between the plurality of joists, beams or girders and the fastener.

22. 2. The method according to claim 1, wherein the liquid adhesive spraying means is a pressure-fed adhesive spraying means capable of holding the liquid adhesive inside and spraying it outward.

23. The adhesive pressure-feeding and spraying means includes a tapered or needle-shaped spray nozzle or a spray needle as an adhesive spray member, 23. The method according to claim 22, wherein the injection nozzle or injection needle has an injection port provided on its side, or the vicinity of the tip of the injection nozzle or injection needle where the injection port is provided is bent so that the injection port is shaped to point perpendicularly or obliquely to the flow path direction of the injection nozzle or injection needle.

24. In the floor structure, at least two adjacent members of the at least one planar member (X) and the at least one support member (Y) are fixed with metal fasteners, The method of claim 1 , wherein in step (c), the liquid adhesive is sprayed onto an area where the metallic fastener is located, as at least a portion of the overlapping or contacting or adjacent portion.

25. 2. The method of claim 1, wherein the liquid adhesive jetting means generates one or more linear jets of the liquid adhesive.

26. The metal material in the concealed fastener includes a magnetic material, 13. The method of claim 12, wherein in step (a), the hidden fasteners are located using a magnet as a metal detection means.

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