Methods to prevent or reduce floor creaking

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 noise in a building or floor structure.

Background Art

[0002] Buildings such as houses, needless to say, include a floor structure that forms a floor inside the building as a structural element. Such a floor structure is generally composed of a planar material such as a floor base material, a surface material or a finishing material, and a plurality of supports that support it. More specifically, as floor and underfloor structures for houses and the like, floor structures by various methods such as the joist method, the joistless method, the laid floor (dry double floor), the rolled joist base, and the wooden floor base are adopted. These floor structures generally have a structure in which a planar material such as a floor base material, a surface material, or a finishing material is supported from below by supports such as joists, large beams, or beams. Each member that contacts or is close to each other is fixed to each other with fasteners such as various nails and staples, and is adhesively fixed using an adhesive as necessary.

[0003] In a floor structure composed of a planar material and a plurality of supports that support it as described above, due to assembly defects between the planar material and the support, poor adhesion / fixation, deformation of each member, and changes over time, noise problems such as creaking and floor noise often occur. Various methods for preventing such noise are also known.

[0004] For example, in Patent Document 1, in a floor and underfloor structure in which a floor base material and a surface material are sequentially laminated on a joist, an injection needle connected to an adhesive pumping means is used, and this injection needle penetrates in the thickness direction of the surface material stretched over the surface of the floor base material, and an adhesive such as a two-component mixed reaction type epoxy adhesive is injected through this injection needle onto the overlapping surface of the floor base material and the surface material. A floor noise prevention method is described.

[0005] Furthermore, Patent Document 2 describes a method for preventing floor creaking that occurs between members of a floor structure, characterized by forming a conduit from the flooring material of the floor structure to the creaking area between the members, injecting a low-viscosity cyanoacrylate adhesive through the conduit, and curing it in a short time to bond and fix the members at the creaking area. Patent Document 2 explains that the areas where creaking occurs are specifically between columns and beams, joists, flooring materials, and baseboards, between beams and joists, between joists and flooring materials, between flooring materials themselves, between joist feet and plywood (underlayment), between plywood and flooring materials, and also between each component, including concealed nails that fix both joists and flooring materials or plywood and flooring materials. The method involves forming guide channels to reach these creaking areas, injecting the adhesive through these guide channels to bond and fix the components at the creaking areas, stopping movement between each component, and thereby preventing floor creaking. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2-213567 [Patent Document 2] Japanese Patent Publication No. 10-205042 [Overview of the project] [Problems that the invention aims to solve]

[0007] The conventional technology described above prevents floor creaking and squeaking by forming through-holes that reach between the components where the creaking and squeaking occur, injecting adhesive between the components through these through-holes, and allowing it to harden to stop the movement between the components. However, the inventors have found that when they have tried the construction method described above, they have often encountered cases where floor creaking and squeaking could not be sufficiently prevented. Therefore, the inventors have identified the establishment of a technology that can more effectively prevent or reduce noises such as floor creaking and squeaking compared to the conventional technology as a new challenge.

[0008] To solve the above-mentioned problems, the inventors diligently studied methods for applying adhesive to the gaps between components that cause floor creaking and squeaking. As a result, the inventors discovered that by spraying liquid adhesive onto the overlapping, contacting, or adjacent portions 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 noises such as floor creaking and squeaking compared to conventional techniques. This invention is completed based on this discovery. [Means for solving the problem]

[0009] In other words, the present invention provides the following: [1] A floor structure comprising a floor portion including at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor portion from below, and comprising a plurality of members, (c) Using a liquid adhesive spraying means, spray liquid adhesive onto at least a portion of the overlapping, contacting, or adjacent portions of at least two members that are in contact with or close to each other, thereby bonding and fixing the at least two members together. A method for preventing or reducing floor creaking, including the following.

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

[0011] [3] The at least one support member (Y) above includes a plurality of support members that directly or indirectly support the floor portion from below and are 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, contacting, or adjacent portions of at least two of the plurality of support members that are in contact with each other, thereby bonding and fixing the at least two support members together.

[0012] [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 its lower surface and are fixed to the base using fasteners. The method according to any one of [1] to [3], 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) to bond and fix the support members together.

[0013] [5] The method according to [4], wherein 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 of the fastener and the 1 or more support members (Y2) to bond and fix the fastener and the support members together.

[0014] [6] The above-mentioned at least one planar member (X) is formed by stacking at least two planar members, The method according to any one of [1] to [5], wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping portion, contact portion, or adjacent portion of two planar members that are in contact with each other, thereby bonding and fixing the two planar members together.

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

[0016] [8] Before step (c), (b) In step (c), within the region where the overlapping portion, contact portion, or proximity portion where the liquid adhesive is sprayed exists in the floor structure, a through hole that reaches the overlapping portion, contact portion, or proximity portion is formed in the thickness direction of the floor structure. further comprising In step (c), the liquid adhesive is sprayed onto at least a part of the overlapping portion, contact portion, or proximity portion through the through hole. The method according to any one of [1] to [7].

[0017] [9] The at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting its lower surface. The floor portion and the one or more support members (Y1) are fixed by using a hidden fastener containing a metal material. Before step (b), (a) Identifying the position of the hidden fastener from above the floor portion using metal detection means. further comprising In step (b), based on the position of the hidden fastener identified in step (a), the position where the through hole is to be formed is determined, and the through hole is formed. The method according to [8].

[0018]

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

[0019]

[11] Before step (c), (b) In step (c), in a region where there is no overlapping portion, contact portion, or proximity portion to which the liquid adhesive is sprayed, forming, in the structure, through-holes that communicate with the space under the floor in the thickness direction thereof; further comprising; In step (c), through the through-holes, using the liquid adhesive spraying means, spraying the liquid adhesive from a predetermined position in the space under the floor onto the overlapping portion, contact portion, or proximity portion, the method according to any one of [1] to

[10] .

[0020]

[12] The at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting its lower surface, The floor portion and the one or more support members (Y1) are fixed by using a hidden fastener containing a metal material, Before step (b), (a) Identifying the position of the hidden fastener from above the floor portion by using metal detection means, further comprising; In step (b), determining the position for forming the through-holes based on the position of the hidden fastener identified in step (a), and forming the through-holes, The method according to

[11] .

[0021]

[13] The metal material in the hidden fastener contains a magnetic material, In step (a), identifying the position of the hidden fastener by using a magnet as the metal detection means, the method according to [9] or

[12] .

[0022]

[14] The at least one support member (Y) includes a support member having a long and angular shape, the method according to any one of [1] to

[13] . In some embodiments, the at least one support member (Y) is substantially cubic, substantially rectangular parallelepiped, substantially cylindrical, substantially prismatic, substantially disc-shaped, substantially log-shaped, or substantially 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 above-mentioned at least one support member (Y) is (i) Multiple joists that support the floor portion in contact with its underside; and (ii) Multiple girders or beams or girders that support the above-mentioned multiple joists in contact with their lower parts, Includes, 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 portion between the floor portion and the plurality of joists, or onto at least a portion of the overlapping, contacting, or adjacent portion between the plurality of joists and the plurality of main beams or girders or girders, thereby bonding and fixing these two members together.

[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 of the base material and the surface material or finishing material to bond and fix the two members together.

[0027]

[19] The at least one planar member (X) includes a base material and a surface material or finishing material laminated thereon, The above-mentioned at least one support member (Y) is (i) Multiple joists that support the floor portion in contact with its underside; and (ii) Multiple girders or beams or girders that support the above-mentioned multiple joists in contact with their lower parts, Includes, In step (c), the liquid adhesive is sprayed onto at least one of the following (p) to (r) to bond and fix each component, according to any one of [1] to

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

[0028]

[20] The above-mentioned at least one planar member (X) includes a base material and seismic damping material and surface material or finishing material which are sequentially laminated on the base material, The above-mentioned at least one support member (Y) is (i) Multiple joists that support the floor portion in contact with its underside; and (ii) Multiple girders or beams or girders that support the above-mentioned multiple joists in contact with their lower parts, Includes, In step (c), the liquid adhesive is sprayed onto at least one of the following (p) to (s) to bond and fix each component, according to any one of the methods in [1] to

[19] : (p) At least a portion of the overlapping, contacting, or adjacent portion between the floor portion and the plurality of joists; (q) At least a portion of the overlapping, contacting, or adjacent portions of the multiple joists and the multiple main beams or girders; and (r) At least a portion of the overlapping portion, contact portion, or adjacent portion between the above-mentioned base material and the above-mentioned seismic damping material; and (s) At least a portion of the overlapping, contacting, or adjacent portion of the above-mentioned seismic damping material and the above-mentioned surface material or finishing material.

[0029]

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

[19] or

[20] , wherein the liquid adhesive is sprayed onto at least one of the above (p) to (r) or (p) to (s) and below (t) to bond and fix each member: (t) At least a portion of the overlapping, contacting, or adjacent portions between the multiple main beams or girders and the fasteners.

[0030]

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

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

[0031]

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

[22] , wherein the spray nozzle or spray needle has an outlet provided on its side, or the vicinity of the tip of the spray nozzle or spray needle on which the outlet is provided is bent so that the outlet is directed perpendicular or obliquely with respect to the flow direction of the spray nozzle or spray needle.

[0032]

[24] In the floor structure described above, at least two of the at least one planar member (X) and the at least one support member (Y) that are adjacent to each other 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 the 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 jet streams of the liquid adhesive. [Effects of the Invention]

[0034] According to the present invention, creaking and squeaking that occur in the floor structure of a building can be effectively prevented or reduced in a short time and at low cost through simple work. In addition, according to the present invention, since it is sufficient to perform minor processing that can be repaired without extensively damaging the floor structure, the appearance and design of the floor after construction are not impaired. [Brief explanation of the drawing]

[0035] [Figure 1] This is an exploded perspective view schematically showing an example of the underfloor structure of a floor structure that may be the target of the present invention. [Figure 2] This figure schematically shows another example of the underfloor structure of a floor structure that may be the target of the present invention. [Figure 3] This is a schematic exploded perspective view showing yet another example of the underfloor structure of a floor structure that may be the subject of the present invention. [Figure 4] This is a schematic diagram illustrating various embodiments of the present invention. [Figure 5] This is a schematic diagram illustrating another embodiment of the present invention. [Figure 6] This figure shows examples of the shapes of the spray nozzle or spray needle of a liquid adhesive spraying means that can be used in embodiments of the invention. [Figure 7] This is a schematic diagram illustrating an example of a spray nozzle or spray needle and adhesive spray flow of a liquid adhesive spraying means that can be used in embodiments of the present invention. [Modes for carrying out the invention]

[0036] The present invention provides a method for preventing or reducing floor creaking, comprising (c) spraying a liquid adhesive onto at least a portion of the overlapping, contacting, or adjacent portions of at least two members that are in contact with or close to each other, using a liquid adhesive spraying means, in a floor structure comprising a floor portion including at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor portion from below, and composed of a plurality of members. The following explains each term and provides examples of specific embodiments that may be adopted in the present invention.

[0037] As described above, the present invention is a method for preventing or reducing floor creaking, and applies to a floor structure that includes "a floor portion containing at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor portion from below, and is composed of multiple 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 of the present invention can be applied to floor structures that are configured in each room of various types of buildings such as detached houses, low-rise houses made of wood or light steel frames, residential apartments and commercial facilities, and also to floor structures that are configured and installed outdoors or in a predetermined spatial space.

[0038] As described above, the method of the present invention is not particularly limited as long as it has the configuration of "a floor structure comprising a floor portion including at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor portion from below, and composed of a plurality of members," but typical examples include floor structures formed by various floor construction methods commonly used in the field of residential construction. Examples of such various floor construction methods include: the joist-laying method, in which a floor structure is constructed by fixing floor surface materials (flooring materials, etc.) to a subfloor composed of girders or beams or girders, joists, and plywood (plywood), etc.; the joist-less method, in which the strength is reinforced by using thicker plywood or other subfloor materials to omit joists and adopt a configuration in which the floor is supported only by girders or beams; the sloping floor method, in which girders are installed on a concrete slab via steel supports, and floor components such as floor panels and finishing materials are laminated on top of the girders; the wooden frame floor subfloor method, in which multiple girders are arranged in a row on a floor slab via feed mortar at regular intervals, and then multiple joists are arranged on top of the girders so as to intersect with the girders, and the floor is constructed on top of the joists; and the sloping joist subfloor method, in which girders are not used in the wooden frame floor subfloor method, and multiple joists are directly placed on the floor slab via feed mortar, and the floor is constructed on top of them.

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

[0040] The underfloor structure 10 shown in Figure 1 employs the following structure. Specifically, base plates (square timbers) 3a and 3b are fixed to the upper part of the perimeter of the foundation 8 constructed on the ground, with their longitudinal sides abutting against each other, and columns 7 are installed at the corners of the foundation 8. Furthermore, in this underfloor structure, in the area inside the foundation 8 (building), pier stones 9 are installed on the ground, and floor joists 6 are placed on top of the pier stones 9. The main beam 5, which is placed on top of the main beam 5, is supported by one of the base plates 3a and the floor joist 6, which are placed on top of the foundation 8. Multiple joists 2b are placed at regular intervals on the upper side of the main beam 5 and on the upper side of the joist hanger 4 fixed to the inner side of the other base plate 3b, and furthermore, a perimeter joist 2a is fixed to the upper part of the base plate 3a with its longitudinal side abutting against it.

[0041] Needless to say, the joist hanger 4 is fixed to the inner side of the sill plate 3b such that its upper side is at the same height as the upper side of the main beam 5. This ensures that the upper sides of the multiple joists 2b are also at the same height, and naturally, the upper side of the perimeter joist 2a is also positioned at the same height as the upper sides of the multiple joists 2b.

[0042] As a result, in the floor structure having the underfloor structure 10 shown in Figure 1, a smooth floor section (not shown) is formed on top of multiple joists 2, and a floor structure that can be the subject of construction according to the present invention is constructed.

[0043] Although Figure 1 shows one of the columns 7 installed at the corner of the foundation 8, multiple columns can be installed around the foundation 8, and the outer edge of the floor formed on multiple joists inside the building can be positioned close to the inner sides of those columns.

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

[0045] The underfloor structure 100 shown in Figures 2(a) and (b) is an underfloor structure constructed using the sloping floor method. Specifically, on a flat concrete slab (floor slab) 108, multiple main beams 5 are arranged at regular intervals via feed mortar 106, which is used as a floor height adjustment material. On top of these, multiple joists 102 are arranged at regular intervals so as to intersect the main beams 5 almost perpendicularly. As the feed mortar 106 is used as a floor height adjustment material as described above, the upper sides of the multiple joists 102 are 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 section (not shown) is formed on top of multiple joists 2, and a floor structure that can be constructed according to the present invention is constructed.

[0047] Next, the underfloor structure 200 shown in Figure 3(a) is an underfloor structure constructed using a joist floor or beam floor 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 arranged parallel to each other in the longitudinal direction at regular intervals and fixed to columns 7, etc., and multiple joists 2 are placed and fixed parallel to each other at regular intervals, intersecting perpendicularly to the girders or beams 205 in the longitudinal direction.

[0049] Then, on top of multiple joists 2 placed on the upper sides of two girders or beams 205, flat floor members such as floor underlayment, floor surface material, and finishing material are laminated and fixed to form a floor section (not shown), thus constructing a floor structure that can be the subject of construction according to the present invention.

[0050] Next, the underfloor structure 300 shown in Figure 3(b) is an underfloor structure constructed using the assembled floor construction method. When the spacing 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 method of constructing a floor by assembling large and small beams is generally called the assembled floor construction method, and this method is mainly used for relatively large spaces on the second floor or higher of buildings.

[0051] In this underfloor structure 300, as shown in Figure 3(b), two or more main beams 205 are fixed to columns 7, etc., in an arrangement perpendicular to each other, and multiple secondary beams 205b that support multiple joists above are fitted into fitting portions (notches) formed on the upper part of the other main beam 205a. The multiple secondary beams 205b are arranged parallel to one of the main beams 205a and are arranged at regular intervals. In addition, it goes without saying that the upper sides of the multiple secondary beams 205b and the upper sides of the main beam 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 sides of the multiple secondary beams 205b and the main beam 205a.

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

[0053] As described above, with reference to Figures 1, 2(a) and (b), and 3(a) and (b), examples of floor structures to be constructed according to the present invention and various members that may constitute them have been explained. The term "multiple members" that constitute the floor structure to be constructed according to the present invention, as stated above, includes 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 planar members (X) that constitute the floor section include base materials such as plywood and concrete panels, seismic damping materials, surface materials, and finishing materials. In addition, in the examples of underfloor structures shown in Figures 1, 2(a) and (b), and 3(a) and (b), the "multiple members" include, for example, support members (Y) such as joists, main beams, joist hangers, edge joists, beams, girders, columns, floor posts, foundation stones, feed mortar, floor height adjustment materials, foundations, and concrete slabs.

[0054] Furthermore, the term "multiple members" is not limited to the various members described above, but is a concept that includes all elements constituting the floor structure, such as columns placed within or around the floor area, as well as fasteners that fix or secure two or more members to each other.

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

[0056] The types of fasteners are not particularly limited, but examples include nails, screws, clamps, staples, support fittings for each component (e.g., joist support fittings, beam support fittings), and fixing fittings such as hold-down fittings. In addition, the material of the fasteners in the floor structure is not particularly limited, and may include one type of material including wood, resin, metal, or magnetic material, or a combination of several types may be used.

[0057] Furthermore, the fasteners used to secure the floor are not limited to those whose upper parts are visible from the floor, but also include, for example, fasteners that secure a flat member to a lower support structure inside the floor (i.e., "hidden fasteners").

[0058] Furthermore, the meaning of the term "directly or indirectly supporting" 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 below. Specifically, in the above terminology, "at least one support member (Y) that directly supports" is a concept that may include joists and perimeter joists that directly support the floor section by abutting against its lower surface, as shown in the examples of underfloor structures in Figures 1, 2(a) and (b), and 3(a) and (b), respectively. On the other hand, "at least one support member (Y) that indirectly supports" is a concept that may include other support members that realize a support structure that directly supports the floor section, such as girders, joist supports, columns, sills, floor posts, foundation stones, foundations, concrete slabs, beams, girders, and filler mortar (floor height adjustment material).

[0059] The meaning of the phrase "overlapping, contacting, or adjacent portions of at least two members that are in contact with or adjacent to each other" in process (c) is that of at least two members that are in contact with or adjacent to each other among the "multiple members" that constitute the floor structure, and includes any part suspected of being a defect that causes floor creaking, or any part that is targeted in advance to avoid becoming a source of floor creaking. In this respect, "overlapping, contacting, or adjacent portions of at least two members that are in contact with or adjacent to each other" can be interpreted literally and includes overlapping, contacting, or adjacent portions of at least two members that are in contact with or adjacent to each other among the various members that constitute the floor structure, and more specifically, includes, for example, (i) to (vii) below.

[0060] (i) The overlapping, contacting, or proximity portion of the floor portion and one or more support members (Y1) that are in contact with or close to the floor portion and directly or indirectly support the floor portion; (ii) The proximity or contact area between the floor and a member in contact with or near the floor (for example, the contact or proximity area between the floor and a column located on the outer perimeter or inside the floor); (iii) Of the at least one support member (Y) that directly or indirectly supports the floor, the overlapping portion, contact portion, or proximity portion of at least two support members that are in contact with or close to each other; (iv) In a configuration in which a floor or at least one planar member (X) constituting a floor 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 or at least one planar member, the at least one support (Y), and the at least one fastener; (v) 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, contacting, or adjacent portions of the at least two support members; (vi) In a structure in which the floor portion is composed of multiple planar members (X) stacked on top of each other, 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 composed of a plurality of planar members (X) stacked on top of each other, and at least two of the plurality of planar members (X) are fixed by at least one fastener, the overlapping portion, contact portion, or adjacent portion of the plurality of planar members (X) and at least two of the fasteners.

[0061] In some embodiments, the "overlapping, contacting, or adjacent portions of at least two members" in step (c) may include overlapping, contacting, or adjacent portions of at least two members that are in contact with or adjacent to each other, selected from the group consisting of floor components (e.g., subflooring materials such as plywood or concrete panels, vibration damping materials, surface materials, finishing materials, cushion sheets, floor sheets, tatami mats, synthetic tatami mats, carpets), joists, beams, girders, purlins, columns, floor posts, foundation stones, feed mortar, floor height adjustment materials, foundations, concrete slabs, and fasteners.

[0062] In certain embodiments, the method according to the present invention may further include, prior to step (c), (b) forming through holes in the floor structure in the thickness direction that reach the overlapping portion, contact portion, or adjacent portion in a predetermined area of ​​the floor structure where the "overlapping portion, contact portion, or adjacent portion" described above in step (c) is located, in which case in step (c) a liquid adhesive can be sprayed through the through holes to at least a portion of the overlapping portion, contact portion, or adjacent portion.

[0063] Furthermore, as described above, if step (b) is provided before step (c), step (c) employs a method of spraying liquid adhesive onto at least a portion of the overlapping, contacting, or adjacent portions of the at least two members through the through-hole. More specifically, liquid adhesive may be sprayed onto at least a portion of the overlapping, contacting, or adjacent portions in the manner of (1) and / or (2) below.

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

[0065] Furthermore, in a particular embodiment, if the floor structure is such that the floor portion and at least one support member located below it are fixed by using concealed fasteners made of metal material, the method according to the present invention may further include, before step (b), (a) identifying the location of the concealed fasteners from above the floor portion using various metal detection means, in which case, in step (b), the location for forming the through-holes can be determined based on the location of the concealed fasteners identified in step (a), and the through-holes can be formed.

[0066] Furthermore, in the case of a floor structure in which the floor portion and at least one support member located below it are fixed by using a concealed fastener containing a magnetic material, the method according to the present invention may further include, before step (b), (a) identifying the position of the concealed fastener from above the floor portion using a magnet as a metal detection means, in which case, in step (b), the position for forming the through-hole can be determined based on the position of the concealed 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 on at least a portion 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 hinder spraying onto the overlapping portion, contact portion, or adjacent portion, as well as the fixing of each member by the adhesive and the prevention or reduction of floor creaking. However, from the viewpoint of ease of work, it is preferable to use a cyanoacrylate adhesive, also known as an instant adhesive. The main component monomer of a cyanoacrylate adhesive reacts with moisture present on the surface of the adherends and in the surrounding air to rapidly harden into a polymer, which strongly adheres the adherends together.

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

[0069] Furthermore, in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping portion, contact portion, or adjacent portion by spraying it using a liquid adhesive spraying means. Therefore, in order to make this spraying work relatively easy and to ensure good application of the liquid adhesive to at least a portion of the overlapping portion, contact portion, or 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, or 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 preferred. Therefore, there is no particular limit to the lower limit of viscosity, but examples include 0.1 mPa·s or higher, 0.2 mPa·s or higher, 0.3 mPa·s or higher, 0.4 mPa·s or higher, 0.5 mPa·s or higher, 0.6 mPa·s or higher, 0.7 mPa·s or higher, 0.8 mPa·s or higher, 0.9 mPa·s or higher, 1.0 mPa·s or higher, 1.5 mPa·s or higher, 2.0 mPa·s or higher, 2.5 mPa·s or higher, and 3.0 mPa·s or higher.

[0070] In certain embodiments, in step (c), a liquid adhesive (preferably a cyanoacrylate adhesive) having a viscosity within a numerical range obtained by combining one of the above-mentioned lower limits and one of the above-mentioned upper limits in a non-contradictory manner can be used.

[0071] As an example of a more preferred embodiment, a commercially available cyanoacrylate adhesive may be used in step (c). Examples of commercially available cyanoacrylate adhesives include Quickbond EL (Kansai Polymer Research Institute Co., Ltd., viscosity 3-5 mPa·s). However, the liquid adhesives that can be used in the present invention are not limited to these.

[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 to achieve a desirable spray flow of the liquid adhesive, thereby achieving a good bonding state of at least two members in at least a part of the overlapping portion, contact portion, or adjacent portion, and thereby reliably preventing or reducing floor creaking.

[0073] In certain embodiments, in step (c), an adhesive curing accelerator may be applied to at least a portion of the overlapping portion, contact portion, or adjacent portion in order to accelerate the curing of the liquid adhesive sprayed and coated onto at least a portion of the overlapping portion, contact portion, or adjacent portion. More specifically, as described above, cyanoacrylate adhesives (instant adhesives) rapidly harden into polymers when their main component monomer reacts with moisture, strongly bonding the adherends together. However, if there is little moisture on the surface of the adherends or in the surrounding air, and sufficient curing of the adhesive cannot be obtained in a relatively short time, an adhesive curing accelerator may be used. Examples of such adhesive curing accelerators include acetone-based, cyclopentane-based, and alcohol-based adhesives, which are commercially available. Therefore, an appropriate one should be selected and used after considering the properties and corrosiveness of each type of adhesive curing accelerator.

[0074] In addition, generally, the timing for applying the adhesive curing accelerator to the object to be bonded is to apply it to at least a portion of the overlapping portion, contact portion, or adjacent portion after spraying the liquid adhesive onto the overlapping portion, contact portion, or adjacent portion in step (c). However, if the desired curing acceleration can be achieved, the timing of application of the adhesive curing accelerator is not limited, and it 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 this invention.

[0075] In step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping portion, contact portion, or adjacent portion using a liquid adhesive spraying means. The liquid adhesive spraying means can be any liquid spraying means that enables the spraying of the liquid adhesive onto the overlapping portion, contact portion, or adjacent portion of the at least two target members in the floor structure. Examples of liquid adhesive spraying means are not limited to, but include an adhesive pumping and spraying means that can hold the liquid adhesive inside and spray it outwards, and a liquid spraying means that includes a liquid spraying nozzle or liquid spraying needle as an adhesive spraying member. As such a liquid spraying means, for example, one can be constructed by arbitrarily combining a syringe pump that is available for medical or industrial use with a spraying needle or injection needle that is available for similar uses.

[0076] For example, an injection needle having the shape shown in Figure 6(a) is a commonly available injection needle for medical use, and such an injection needle may be used as a component of the adhesive pumping and spraying 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 to control the spraying direction of the liquid adhesive in a desired direction, taking into consideration the position of at least a part of the overlapping portion, contact portion, or adjacent portion to which the liquid adhesive is sprayed in step (c), constraints imposed by the surrounding structure, etc.

[0078] For example, as shown in Figure 6(b), a liquid adhesive spraying means may be used that includes a spray nozzle or spray needle or injection needle with a tip of about 1-2 mm having a spray opening, which is bent horizontally, as the adhesive spraying means. Furthermore, in another embodiment, as shown in Figure 6(c), a liquid adhesive spraying means may be used that includes a spray nozzle or spray needle or injection needle with a hole on its side that serves as an adhesive spray opening, which is provided as the adhesive spraying means. In the example shown in Figure 6(c), there is one hole that serves as the adhesive spray opening, but a spray nozzle or spray needle or injection needle with multiple holes (adhesive spray openings) may be used as the adhesive spraying means.

[0079] Furthermore, in certain embodiments, when spraying the liquid adhesive onto the overlapping portion, contact portion, or adjacent portion using the liquid adhesive spraying means in step (c), although not particularly limited, it is also preferable to use a method in which one or more linear jet streams S are generated from the spray nozzle or spray needle N, as shown in Figures 7(a) and (b), and at least a portion of the one or more linear jet streams is sprayed onto the overlapping portion, contact portion, or adjacent portion. Although not particularly limited, for example, if the liquid adhesive spraying means is configured by arbitrarily combining a liquid pumping means such as a syringe pump with an elongated spray nozzle or spray needle as described above, it is possible to generate one or more linear jet streams of liquid adhesive as described above, and therefore such a liquid adhesive spraying means can be preferably used. In addition, by appropriately adjusting the pressure applied to the adhesive pumping means, the number of linear spray streams of adhesive generated can be controlled. Furthermore, pumping the adhesive at a relatively high pressure increases the number of linear spray streams and can also generate adhesive mist in the surrounding area. Therefore, the pumping pressure may be controlled according to the desired adhesive spraying pattern.

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

[0081] Figures 4(a), (b), and (c), and Figure 5 show more specific embodiments. Figure 4(a) schematically shows a floor structure in which the lower part of the floor section 11 is fixed to the joist (support member) 2 located below by a metal fastener T. Since it is suspected that floor creaking is occurring due to poor fixing at the lower part of the floor section 11, the metal fastener T and the joist 2, the overlapping, contacting, or adjacent parts, an embodiment is shown in which liquid adhesive is sprayed onto the overlapping, contacting, or adjacent parts using a liquid adhesive spraying means A to prevent or reduce floor creaking.

[0082] More specifically, in areas where poor fixing is suspected at the overlapping, contacting, or adjacent portions of the metal fastener T and joist 2, the position and arrangement of the metal fastener T and joist 2 are identified using a magnet (not shown). Based on the identified position and arrangement of the metal fastener T and joist 2, a through-hole P in the floor is formed using a cutting means such as a drill at a predetermined distance (e.g., 5-10 cm) from the upper point of the joist 2 where floor creaking is observed (the area where the fastener 2 is located on top), at a location on the floor where the lower part is the underfloor space. Next, a predetermined amount of liquid adhesive is filled into a syringe pump P, which serves as an adhesive pumping means, and a spray nozzle or spray needle N with a nozzle hole and a tip bent at a right angle by about 1-2 mm 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 pumped and sprayed onto the lower part of the floor 11, the overlapping, contacting, or adjacent portions of the metal fastener T and joist 2. The curing of the sprayed liquid adhesive fixes each component in place, preventing floor creaking. The through-holes P can then be repaired using various floor repair materials.

[0083] Figure 4(b) shows an embodiment in which, because it is suspected that the outer edge of the floor section 11 is rubbing against the column 7 adjacent to it, causing floor creaking, liquid adhesive is sprayed onto the contact area or adjacent area between the outer edge of the floor section 11 and the column under the floor using a liquid adhesive spraying means A to prevent or reduce floor creaking. Similar to the embodiment shown in Figure 4(a), in the area of ​​the floor surface near the column where floor creaking is observed, a floor penetration hole P reaching the space beneath the floor is formed using a cutting means such as a drill at a predetermined distance from the side of the column. The spray nozzle or spray needle N of the liquid adhesive spraying means A is inserted into the penetration hole P, and the liquid adhesive filled in the syringe pump P is pumped under pressure and sprayed onto the contact area or proximity area between the outer edge of the floor section 11 and the column beneath the floor. The hardening of the sprayed liquid adhesive fixes each component in place, preventing floor creaking. The penetration hole P can then be repaired using various floor repair materials.

[0084] Figure 4(c) is a schematic cross-sectional view of an underfloor structure that corresponds to the underfloor structure shown in Figures 2(a) and (b), and is specifically a schematic cross-sectional view of an underfloor structure constructed using the sloping floor construction method. The embodiment shown in Figure 4(c) is an embodiment that resolves the suspected cause of floor creaking, which is not poor fixing of the floor section 11 and joists 2 and the fasteners that fix them, but rather poor fixing of the main beam 5, which functions as an indirect support for the floor section, and the concrete slab 108. The main beam 5 and the concrete slab 108 are fixed together by fasteners T (metal bolts and nuts) as shown in Figure 4(c).

[0085] Similar to Figures 4(b) and (c), a through-hole P is formed in the floor that reaches the space under the floor and is located above the main beam 11. The spray nozzle or spray needle N of the liquid adhesive spraying means A is inserted into the through-hole P, and the liquid adhesive filled in the syringe pump P is pumped under pressure to evenly spray the liquid adhesive onto the area where the fastener T is located above the main beam by repeatedly tilting the syringe pump of the liquid adhesive spraying means A horizontally. The hardening of the sprayed liquid adhesive fixes each component in place and prevents floor creaking. The through-hole P can then be repaired using various floor repair materials.

[0086] Figure 5 illustrates one embodiment of applying the method according to the present invention to a floor structure constructed using a joist-less floor construction method. In the embodiment shown in Figure 5, floor creaking was suspected to be caused by a faulty fixing and fastening between the lower part of the main beam 5, which directly supports the floor 11 in contact with its lower surface, and the upper part of the foundation packing 102a and steel support 102, which are placed on the foundation riser 8a. Therefore, liquid adhesive is sprayed onto the overlapping, contacting, or adjacent parts of the lower part of the main beam 5 and the upper part of the foundation packing 102a, and the overlapping, contacting, or adjacent parts of the lower part of the main beam 5 and the upper part of the steel support 102, following the procedure shown in Figures 4(a) to (c). Then, as the sprayed liquid adhesive hardens, each component is fixed in place, and floor creaking is prevented.

[0087] Although specific embodiments of the present invention have been described in detail above, the present invention is not limited to the embodiments described above. Various modifications, alterations, and arbitrary combinations of each configuration, element, and feature can be adopted without departing from the spirit of the present invention. In the present invention, unless otherwise specified, the terms "includes" and "have" do not exclude the existence of elements other than those referred to as the objects of these terms, and these terms are used interchangeably. Furthermore, each component and each technical feature shown in each of the above embodiments can be adopted additionally or substituted in each embodiment, unless otherwise inconsistent, and embodiments adopting additional or substituted components and each technical feature are expressly provided herein. [Examples]

[0088] <Example of construction 1: A 30-year-old house (apartment)> This construction example applies to a floor structure that includes a floor section with wooden flooring material on the surface and joists supporting it from below, and is an example of one embodiment of the present invention being implemented. In the floor area where creaking was observed, a magnet was scanned from above the floor surface to identify the location of fasteners (metal nails) that secure the floor section, including the wooden flooring material, to the joists.

[0089] Next, using a cutting drill, a through-hole approximately 2 mm in diameter was formed in a nearly vertical direction at a point 10 cm horizontally away from the floor surface where the fastener (nail) was located, as identified above. The aforementioned through-holes are formed approximately 5 to 10 cm away from the end (or center) of the joist, in a roughly vertical direction on the floor, and reach the space beneath the floor.

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

[0091] The syringe was filled with cyanoacrylate-based liquid adhesive Quickbond EL (viscosity: 3-5 mPa·s), the injection needle was attached, the needle portion was inserted through the through-hole, and the liquid adhesive was sprayed from a predetermined position in the space under the floor towards the overlapping or adjacent portion of the joist and floor member (flooring material) near the location where the floor creaking was observed.

[0092] Furthermore, the above-mentioned injection needle is bent approximately perpendicular to its longitudinal direction near the tip. When the adhesive is pushed out with a syringe pump, depending on the amount of force (pressure) applied, multiple linear jets of adhesive are generated approximately horizontally and / or approximately diagonally upward and downward on the side where the nozzle of the injection needle is located. These linear jets are then sprayed onto the space between the two target members (the overlapping portion, the contact portion, or the adjacent portion).

[0093] As described above, adhesive was sprayed onto the overlapping or adjacent areas between the floor and joists in the floor structure, and after 30 seconds, the floor creaking was checked and the creaking that had been observed before the work was completely gone. The method described in this construction example involves forming through holes in the floor surface on the side of the joists and spraying the liquid adhesive from the side onto the overlapping or adjacent parts of the joists and the floor. However, fasteners (metal nails) that secure plywood or other floor components to the joists from above are present at the overlapping or adjacent parts of the two components, penetrating both components. In this respect, the method described in this construction example essentially adopts a method of spraying the adhesive onto the gaps that may exist in the overlapping or adjacent parts and the sides of the fasteners' penetrating portions. As can be seen from the fact that the floor creaking completely disappeared after construction, it is thought that the floor creaking was caused by friction between the metal fasteners and the adjacent plywood or joists due to poor adhesion and fixing of the joists and floor components by the metal fasteners. Furthermore, in this construction example, the overlapping or adjacent areas 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 areas, were fixed with adhesive. This prevented friction between the metal fastener and the adjacent plywood member or joist, thus eliminating the floor creaking.

[0094] <Example of construction 2: A 40-year-old house (apartment)> This construction example applies to a floor structure that includes a vinyl chloride cushion floor sheet as the surface material (with plywood underneath) and joists supporting it from below, and demonstrates the implementation of one embodiment of the present invention. In the floor area where floor creaking was observed, a magnet was scanned from above the floor surface with the cushion flooring, similar to the method used in Construction Example 1, to identify the location of the fasteners (metal nails) that secure the floor to the joists.

[0095] Next, using a cutting drill, a through-hole approximately 2 mm in diameter was formed in a nearly vertical direction at a point 10 cm horizontally away from the floor surface where the fastener (nail) was located, as identified above. The through-holes described above are formed approximately vertically at a point on the floor about 5 to 10 cm away from the end (or center) of the joist, similar to the construction example 1, and reach the space beneath the floor.

[0096] Similar to Construction Example 1, using the adhesive spraying means described above, Quickbond EL (viscosity: 3-5 mPa·s), a liquid adhesive, was sprayed through the aforementioned through-holes from a predetermined position in the space under the floor, in the direction of the overlapping or adjacent portion of the joist and floor member near the location where floor creaking was observed.

[0097] As described above, adhesive was sprayed onto the overlapping or adjacent areas between the floor and joists in the floor structure, and after 30 seconds, the floor creaking was checked and the creaking that had been observed before the work was completely gone. In the method described in this construction example, fasteners (metal nails) that secure the plywood member to the joist from above are present at the overlapping or adjacent portions of the plywood member and the joist, penetrating both members. Therefore, in this construction example, it is believed that the friction between the metal fasteners and the adjacent plywood member or joist was prevented by the adhesive fixing of the area including the overlapping or adjacent portion and a part of the metal fastener penetrating the overlapping or adjacent portion, thus eliminating the floor creaking.

[0098] <Example of construction 3: A 40-year-old house (apartment)> This construction example illustrates a case where floor creaking was caused not by a faulty fixation between the floor joists and the floorboards, but by a faulty fixation between the main beams and the sill plate.

[0099] Initially, it was assumed that the floor creaking was caused by a faulty fixation between the floor and the joists. Following the same procedure as in Construction Example 1, liquid adhesive was sprayed onto the overlapping or adjacent areas of the floor and joists to attempt to reduce the creaking, but the creaking did not disappear. Generally, the sound quality of floor creaking caused by various factors varies depending on the cause, but floor creaking caused by a faulty fixation between the floor and the joists and creaking caused by a faulty fixation of the main beams tend to have similar sound qualities. Since the sound quality was similar in this construction example, it was then considered that there was a problem with the main beams located beneath the area where the creaking was observed, and that this was the cause of the creaking. More specifically, since the house targeted in this construction example is an apartment building, it was assumed that the main beams located beneath the joists are fixed to the concrete slab below them with a certain gap via height adjustment materials, using fasteners such as bolts and nuts from above. It was predicted that a faulty fixation of the main beams by these fasteners was the cause of the creaking (shown in Figure 2(a) for the floor structure).

[0100] Considering the typical spacing (distance) of joists and beams, multiple through-holes of approximately 2 mm in diameter were sequentially formed at approximately 5 cm intervals from a predetermined position on the floor surface where a joist identified as being located beneath the area where floor creaking was observed was located. Then, a long, slender stainless steel rod was inserted into each through-hole almost perpendicularly until its tip reached the lower member, and the height level was checked to form through-holes where beams were predicted to be located beneath.

[0101] A syringe similar to that used in Construction Example 1 was filled with cyanoacrylate-based liquid adhesive Quickbond EL (viscosity: 3-5 mPa·s), and an unprocessed injection needle (overseas-made, 12-18 gauge) was attached (Figure 6(a)). The injection needle portion of this liquid adhesive pumping device was then inserted through the aforementioned through-hole, and the syringe portion was repeatedly tilted horizontally above the floor to distribute the liquid adhesive evenly onto the upper surface of the main beams from a predetermined position in the space beneath the floor.

[0102] As described above, after applying the liquid adhesive, we checked for floor creaking 30 seconds later, and found that the creaking that had been observed before the application had completely disappeared. [Industrial applicability]

[0103] This invention has extremely high industrial applicability in the fields of building construction, construction work, and renovation work. [Explanation of Symbols]

[0104] 2, 102 joists 2a Edge joist 2b Joist 3a, 3b Foundation 4. Joist hanging 5. Big pull 6 floor bundle 7 pillars 8 Basics 9 foundation stones 10, 100, 200, 300 Underfloor structure 11 Floor 106 Floor height adjustment material (girder support) 108 Concrete slab (foundation) 205 girders or beams 205a girder 205b Small beam A. Liquid adhesive spraying means (adhesive pressure spraying means) N spray nozzle (spray needle) P Adhesive pumping method (syringe pump)

Claims

1. A floor structure comprising a floor portion including at least one planar member (X) and at least one support member (Y) that directly or indirectly supports the floor portion from below, and composed of a plurality of members, (c) Applying liquid adhesive to at least a portion of the overlapping, contacting, or adjacent portions of at least two members that are in contact with or close to each other, using a liquid adhesive spraying means, thereby bonding and fixing the at least two members together. A method for preventing or reducing floor creaking, including the following.

2. The above-mentioned at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting its lower part, The method according to claim 1, wherein in step (c), the liquid adhesive is sprayed onto at least a portion of the overlapping portion, contact portion, or adjacent portion of the floor portion and the one or more support members (Y1) to bond and fix the floor portion and the one or more support members (Y1).

3. The above-mentioned at least one support member (Y) includes a plurality of support members that directly or indirectly support the floor portion from below and are stacked vertically. 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 bonding and fixing the at least two support members together.

4. The above-mentioned 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 its lower surface and are fixed to the 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 portion, contact portion, or adjacent portion of the one or more support members (Y1) and the one or more support members (Y2) to bond and fix the support members together.

5. The method according to claim 4, wherein in step (c), liquid adhesive is sprayed using a liquid adhesive spraying means onto at least a portion of the overlapping portion, contact portion, or adjacent portion of the fastener and the 1 or more support members (Y2) to bond and fix the fastener and the support members together.

6. The above-mentioned at least one planar member (X) is formed by stacking 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 portion, contact portion, or adjacent portion of two planar members that are in contact with each other, thereby bonding and fixing the two planar members together.

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

8. Before step (c), (b) In the area where the overlapping portion, contact portion, or adjacent portion is present to which the liquid adhesive is sprayed in step (c), a through hole is formed in the floor structure in the thickness direction that reaches the overlapping portion, contact portion, or adjacent portion. It further includes, The method according to any one of claims 1 to 7, wherein in step (c), the liquid adhesive is sprayed through the through hole onto at least a portion of the overlapping portion, contact portion, or adjacent portion.

9. The above-mentioned at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting its lower surface, The floor portion and the one or more support members (Y1) are fixed together by using concealed fasteners containing metal material. Before step (b), (a) From above the floor portion, use a metal detection device to locate the position of the concealed fastener. It further includes, In step (b), the position for forming the through hole is determined based on the position of the concealed fastener identified 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, contact portion, or adjacent portion from a predetermined position in the space under the floor.

11. Before step (c), (b) In the region where there is no overlapping portion, contact portion, or adjacent portion to which the liquid adhesive is sprayed in step (c), a through-hole is formed in the structure in the thickness direction that leads to the space under the floor. It further includes, The method according to claim 10, wherein in step (c), the liquid adhesive is sprayed through the through hole using the liquid adhesive spraying means from a predetermined position in the space under the floor onto the overlapping portion, contact portion, or adjacent portion.

12. The above-mentioned at least one support member (Y) includes one or more support members (Y1) that support the floor portion by contacting its lower surface, The floor portion and the one or more support members (Y1) are fixed together by using concealed fasteners containing metal material. Before step (b), (a) From above the floor portion, use a metal detection device to locate the position of the concealed fastener. It further includes, In step (b), the position for forming the through hole is determined based on the position of the concealed fastener identified in step (a), and the through hole is formed. The method according to claim 11.

13. The metal material in the above-mentioned concealed fastener includes a magnetic material. The method according to claim 9, wherein in step (a), the position of the concealed fastener is identified using a magnet as a metal detection means.

14. The method according to claim 1, wherein the at least one support member (Y) includes a support member that is elongated and has the shape of a rectangular timber.

15. The method according to claim 1, wherein the liquid adhesive is a cyanoacrylate-based adhesive.

16. The method according to claim 1, wherein the viscosity of the liquid adhesive is 50 mPa·s or less.

17. The above-mentioned at least one support member (Y) is (i) Multiple joists that support the floor portion in contact with its underside; and (ii) Multiple girders or beams or girders that support the above-mentioned multiple joists in contact with their lower parts, Includes, 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 main beams or girders, thereby bonding and fixing these two members together.

18. The above-mentioned at least one planar member (X) includes a base material and a surface material or finishing material laminated thereon, 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 of the base material and the surface material or finishing material to bond and fix the two members together.

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

20. The above-mentioned at least one planar member (X) includes a base material and seismic damping material and surface material or finishing material that are sequentially laminated on the base material, The above-mentioned at least one support member (Y) is (i) Multiple joists that support the floor portion in contact with its underside; and (ii) Multiple girders or beams or girders that support the above-mentioned multiple joists in contact with their lower parts, Includes, The method according to claim 1, wherein in step (c), the liquid adhesive is sprayed onto at least one of the following (p) to (s) to bond and fix each member: (p) At least a portion of the overlapping, contacting, or adjacent portions between the floor portion and the plurality of joists; (q) At least a portion of the overlapping, contacting, or adjacent portions of the above-mentioned multiple joists and the above-mentioned multiple main beams or girders or girders; and (r) At least a portion of the overlapping portion, contact portion, or adjacent portion of the above-mentioned base material and the above-mentioned seismic damping material; and (s) At least a portion of the overlapping portion, contact portion, or adjacent portion between the above-mentioned seismic damping material and the above-mentioned surface material or finishing material.

21. The above-mentioned multiple main beams, girders, or purlins are fixed to the sill, floor joists, or foundation using fasteners. The method according to claim 19 or 20, wherein the liquid adhesive is sprayed onto at least one of the above (p) to (r) or (p) to (s) and below (t) to bond and fix each member: (t) At least a portion of the overlapping, contacting, or adjacent portions between the plurality of main beams or girders and the fasteners.

22. The method according to claim 1, wherein the liquid adhesive spraying means is an adhesive pressure spraying means capable of holding the liquid adhesive inside and spraying it outwards.

23. The above adhesive pressure-feeding and spraying means includes, as an adhesive spraying member, a tapered or needle-shaped spray nozzle or spray needle, The method according to claim 22, wherein the injection nozzle or injection needle has an outlet provided on its side, or the vicinity of the tip of the injection nozzle or injection needle on which the outlet is provided is bent so that the outlet is directed perpendicular or obliquely with respect to the flow direction of the injection nozzle or injection needle.

24. In the above floor structure, at least two of the at least one planar member (X) and the at least one support member (Y) that are adjacent to each other are fixed with metal fasteners. The method according to claim 1, wherein in step (c), the liquid adhesive is sprayed onto the area where the metal fastener is located, which is at least a part of the overlapping portion, contact portion, or adjacent portion.

25. The method according to claim 1, wherein the liquid adhesive spraying means generates one or more linear jet streams of the liquid adhesive.

26. The metal material in the concealed fastener includes a magnetic material, The method according to claim 12, wherein in step (a), the position of the concealed fastener is identified using a magnet as a metal detection means.

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