JP2008106447A - Reinforcing body for building, and reinforcing method for building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing body for a building and a reinforcing method for the building improving construction efficiency and mechanical strength. <P>SOLUTION: The reinforcing body is formed of a sponge material into block shape with a first joint face 12 and a second joint face 13 facing the connection parts of at least a set of connected structural members 3, 4, 5 of the building. The reinforcing body impregnated with an epoxy resin adhesive 11 is formed and reinforces the connection parts 7 by joining the first joint face 12 and the second joint face 13 to the relative connection parts 7 of the respective structural members. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a reinforcing body for a building that reinforces the joint portion by joining across the joint portions facing each other of all structural members of the building by simple construction.

  In buildings, on July 1, 2005, the “Act on Partial Amendments to the Building Standards Act for Building Safety and Disaster Prevention Functions in Urban Areas” was enforced. The improvement of earthquake resistance and durability at the joint site is intended. On the other hand, for buildings constructed prior to the enforcement of the revised law, reinforcement measures to improve them to the same level of seismic resistance and durability are extremely important issues.

  In the reinforcement work of existing buildings, measures to increase the reinforcement for the foundation are required, such as the addition of seismic hardware for each column base on the first and second floors, and the addition of braces. Measures to reinforce the foundation require complex and large-scale construction such as chopping of the existing foundation, construction of reinforcement and formwork, placement of concrete, demolding and finishing, and a construction period of about 2 weeks Is also necessary.

  As for the reinforcement work, it is necessary to perform reinforcement work such as reinforcement of the scaffolding and removal of the outer wall, attachment of plywood and hardware, or restoration of the outer wall and removal of the scaffolding. In addition, in the reinforcement work, it is necessary to remove the inner wall board and heat insulating material, install the reinforcement hardware, restore the inner wall and paste the cloth, etc. Additional work such as moving and re-installing the air conditioner and various pipes is also necessary It is. Reinforcement work requires a curing period for foundation concrete and outer wall mortar, which further increases the construction period.

  In buildings, for the above-mentioned general reinforcement work using reinforcing bars and various hardware, for example, reinforcement consisting of a fiber sheet and an adhesive for the joint part such as foundation and foundation, foundation and pillar or pillar and reinforcement, etc. There has been proposed a construction method that shortens or simplifies the reinforcement work by using a material (see Patent Documents 1 to 3). Patent Document 1 applies high adhesive strength to the bonded surface with excellent toughness while applying adhesive to the joints between building members that make up the building frame such as foundations, foundations, pillars, horizontal members, braces, etc. An adhesive agent is further apply | coated after sticking the fiber sheet which has. Patent Document 1 exemplifies an aramid fiber, carbon fiber, and glass fiber as a fiber sheet, and a two-component mixed epoxy adhesive as an adhesive.

  Patent Document 2 uses a joining member selected from a composite fiber made of aramid fiber alone or other reinforcing fiber, and an adhesive and / or a nail, a screw, a bolt, and a nut, as a joint part of a wooden structure. And join. Patent Document 2 exemplifies organic fibers such as carbon fibers, glass fibers, metal fibers or polyester fibers as reinforcing fibers, and epoxy resin adhesives, acrylic resin adhesives or polyamide resin adhesives as adhesives. Is illustrated.

  Further, in Patent Document 3, a reinforcing material in which an epoxy resin agent is impregnated with a nonwoven fabric made of a long fiber of a thermoplastic resin is overlapped and bonded to a bonding portion between a base and a pillar. Patent Document 3 exemplifies polyethylene, polypropylene, polyethylene terephthalate, and acrylic as thermoplastic resin fibers constituting the nonwoven fabric.

JP 2001-279814 A JP 2002-30727 A JP 2004-100303 A

  By the way, in a building, for example, when reinforcing a base and a pillar, a hole-down hardware generally formed of a metal material such as stainless steel is used. Such hole-down hardware is relatively expensive, and the cost of the material alone is high because it is attached to many places. Further, for example, when the reinforcement work using the reinforcement hardware is performed in an existing building, it is necessary to take measures such as moving a structural member such as a pillar in order to attach the reinforcement member to an optimal position. Further, the reinforcement work using the reinforcement hardware has a problem that the strength of the structural member itself is lowered because a large number of holes for driving bolts or the like are punched into the structural member such as a base or a pillar.

  On the other hand, the reinforcement construction using the fiber sheet disclosed in each patent document can be attached by a simple operation without applying a load to the structural member. However, although the aramid fiber, carbon fiber or glass fiber is used for the fiber sheet disclosed in each patent document, it is relatively inexpensive as a fiber material, although it is slightly less expensive than the reinforcing metal, and the fiber diameter The impregnation efficiency of the adhesive is also small. In addition, the fiber sheet is integrated by mechanical bonding by an anchor action and physical bonding by intermolecular attractive force due to the presence of an adhesive between the fibers, and is bonded to the structural member by the adhesive force of the adhesive. Will be.

  Therefore, according to the reinforcement construction using the fiber sheet disclosed in each patent document, the mechanical strength of the bonded portion is maintained by the fiber sheet joined to the structural member by the adhesive, and therefore, the reinforcement is performed according to the characteristics of the fiber sheet. The strength will also be determined. In such reinforcement construction, it is difficult to obtain sufficient reinforcement strength as compared with the reinforcement construction using the above-described reinforcement hardware, and mechanical strength is exhibited in the fiber arrangement direction. Therefore, in such reinforcement construction, it may be difficult to attach to the optimal position by the arrangement structure of the structural members in the same manner as the reinforcement hardware. For example, it is joined in an L shape across the orthogonal planes where the base and the column face each other. Such an application cannot be expected to provide sufficient reinforcement.

  Moreover, in the reinforcement method using the above-described reinforcement hardware and fiber sheet, a reinforcement hardware and fiber sheet that are formed in advance with a predetermined dimensional specification and provided as a standard product are selected and used according to each target site in the field. Yes. Therefore, in such a reinforcement method, the reinforcing hardware and the fiber sheet are not compatible and are expensive.

  The applicant has proposed a new reinforcing body that solves the problems of the various conventional reinforcing methods described above by allowing various structural members to be coupled with a predetermined mechanical strength against a tensile force and a compressive force. And the reinforcement method was developed. The new reinforcement method is also a method in which a reinforcement body is joined between structural members using an epoxy resin adhesive to reinforce, but it reinforces the properties of an epoxy resin adhesive that has high hardness in the cured state but is brittle. It is a construction method in which reinforcement is performed by constituting a reinforcing body that is tough and has elasticity to absorb seismic energy by complementing with a cellulose material used as a body material.

  That is, the new reinforcing method is based on the action of a curing agent composed of a bifunctional compound of an epoxy resin adhesive on the OH group for a cellulose material having more OH groups than the synthetic resin fiber described above. The ring-opened epoxy group is polymerized to form an intermolecular crosslinked structure and is cured. According to the new reinforcement method, the cellulose material and the epoxy resin of the epoxy resin adhesive are integrated to demonstrate the high adhesiveness and high strength characteristics of the epoxy resin adhesive, and the brittleness characteristics of the epoxy resin A reinforcing body which is complemented by a fiber sheet as a material and has elasticity is formed. Therefore, according to the new reinforcement method, it is used in common for the joint portions of all structural members of the building, and a large resistance is exerted against tensile force and compressive force by simple construction. According to the new reinforcement method, even if a large force is applied to each connecting part of a structural member in the event of an earthquake, etc., it is possible to hold it securely and firmly without peeling and to improve earthquake resistance and durability. .

  The applicant realizes a building reinforcement body and a building reinforcement method for further improving the construction efficiency and mechanical strength by further devising the above-described new reinforcement body and reinforcement method. It came to.

  That is, the reinforcing body and the reinforcing method according to the present invention aim to improve the above-described problems of the fiber sheet used in the above-described novel reinforcing body and reinforcing method.

  The reinforcing body for a building according to the present invention is made of a sponge material, and has a first joint surface and a second joint surface facing a joint portion of at least one set of structural members to which the building is joined. And is formed by impregnating an epoxy resin adhesive. The reinforcing body for a building reinforces the joint part by joining the first joint surface and the second joint surface to the joint part facing each structural member. For example, the reinforcing body for building is attached by placing the first joint surface on the surface of the base and the second joint surface on the side surface of the column erected perpendicularly to the base.

  In addition, the building reinforcing body according to the present invention includes a first structural member and a second structural member which are made of a sponge material and are orthogonally coupled, and a coupling portion between the first structural member and the second structural member. And used in a building including a third structural member coupled together. The building reinforcing body is made of a sponge material, and has at least a first joint surface to a third joint surface that face each coupling portion of the first structural member to the third structural member, and is formed in a block shape. And impregnated with an epoxy resin adhesive. The reinforcing body for a building reinforces the joint portion by joining the first joint surface to the third joint surface across the joint portions facing each other of the first structural member to the third structural member, respectively. For example, the reinforcing body for a building has the first joint surface applied to the surface of the base, the second joint surface is applied to the side surface of the column erected perpendicularly to the base, and the third joint surface is further cut or large. It is attached to the side of the brace that is nailed to the base and the pillar by the putting structure.

  In the reinforcing body for buildings, the sponge material is formed in a block shape so that it can be attached independently on a structural member such as a base, and the handling becomes simple. In the reinforcing body for buildings, an epoxy resin adhesive is efficiently impregnated inside the sponge material. In the reinforcing body for buildings, it is possible to process the sponge material into an arbitrary shape according to the shape of the base or the column using a knife or the like, and compatibility in the field is achieved.

  In the reinforcing body for buildings, the epoxy resin adhesive can be efficiently impregnated inside the sponge material by spraying the epoxy resin adhesive with an air gun or the like in the attached state. In addition, in the reinforcing body for buildings, it is possible to impregnate the inside thereof with an epoxy resin adhesive by previously immersing the sponge material in the epoxy resin adhesive in a pre-attachment process. In building reinforcements, synthetic resin fibers and the like are impregnated with an epoxy resin by complementing the properties of the epoxy resin adhesive which has a high hardness in a cured state but is brittle by polymerization with a sponge body. Constructs a reinforcing body with greater elasticity compared to a reinforcing body for buildings, and holds it securely and firmly without peeling off from the connecting part even if a large force is applied to the connecting part of the structural member in the event of an earthquake, etc. .

  A building reinforcement method according to the present invention is a block having a first joint surface and a second joint surface facing a joint portion of at least one pair of structural members to which a building is joined, using a sponge material as a raw material. A reinforcing body for a building which is formed in a shape and impregnated with an epoxy resin adhesive is used. The building reinforcement method reinforces a building reinforcing body by joining the first joint surface and the second joint surface to the joint portions facing each other of the structural members.

  According to the present invention, a sponge material is used as a raw material to form a block having a first joint surface and a second joint surface opposite to a joint portion of at least one set of structural members, and impregnated with an epoxy resin adhesive. Therefore, the brittleness characteristic of the epoxy resin adhesive is complemented by the sponge material, so that the elastic reinforcement body is formed. According to the present invention, it can be used in common for all structural members of a building, and it has a great resistance to tensile force and compressive force, thereby improving mechanical strength. For example, the bonding site is securely and firmly held without peeling from each bonding site of the structural member. According to the present invention, the reinforcing body formed in a block shape can be attached to the corner structure member by itself, and it is easy to handle as compared with the sheet-shaped reinforcing body and each joint surface is It is possible to bond the structural member to the mounting surface in close contact. According to the present invention, by using a sponge material as a raw material, an epoxy resin adhesive is efficiently impregnated inside the reinforcing body and firmly bonded to the structural member, and the sponge material is used as a base or a pillar using a knife or the like. It is possible to process into any shape according to the shape, and compatibility in the field is achieved.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Details of a building reinforcing body (hereinafter abbreviated as a reinforcing body) 1 shown as an embodiment of the present invention, a reinforcing structure of a building using the reinforcing body 1 and a reinforcing construction method will be described in detail with reference to the drawings. Explained. As will be described later, the reinforcing body 1 is joined to a joint portion between various structural members to which the building is joined, and has high strength adhesiveness and appropriate elasticity in the joined state, and is pulled against the joint portion. Improves mechanical strength by imparting great resistance to force and compressive force. The reinforcing body 1 is used for a newly built wooden structure, various concrete structures, and the like, and is also used for seismic reinforcement work in an existing building.

  The reinforcing body 1 is, for example, a first coupling portion 7A configured between structural members in a wooden house shown in FIG. 1, that is, a foundation 2, a base 3, a pillar 4, a trunk difference (including a beam) 5, or a brace 6. Through the use of the fourth binding site 7D (hereinafter collectively referred to as the coupling portion 7 except when individually described), the respective binding sites 7 are reinforced. Of course, the reinforcing body 1 is used not only between the above-described structural members, but also at other locations in the wooden house, for example, at sites where various structural members are connected under the floor or behind the ceiling. In addition, the reinforcing body 1 is basically used in each binding site 7, but each configuration will be described later. However, as shown in FIG. It is also possible to select and use the first reinforcing body 1A to the fourth reinforcing body 1D.

  As shown in FIG. 1, the first reinforcing body 1 </ b> A includes a base 3 fixed on the foundation 2 with anchor bolts 8, a column 4 erected on the base 3 with an appropriate coupling structure, and a brace 6 One end portion is used for the first coupling portion 7A in which the base 3 and the pillar 4 are coupled to each other. The first reinforcing body 1 </ b> A reinforces the first coupling portion 7 </ b> A by being joined across the base 3, the column 4, and the brace 6.

  As shown in FIG. 1, the second reinforcing body 1 </ b> B is used, for example, in a second coupling part 7 </ b> B in which a pillar 4 is erected on a base 3. The 2nd reinforcement body 1B reinforces this 2nd coupling | bond part 7B by straddling over the foundation 2, the base 3, and the pillar 4, or straddling over the base 3 and the pillar 4. FIG. As shown in FIG. 1, the third reinforcing body 1 </ b> C includes, for example, a third connecting portion 7 </ b> C that forms a connecting portion between a plurality of pillars 4 and a trunk difference 5 that spans between the pillars 4 and supports the beams. Used for. The third reinforcing body 1 </ b> C reinforces the third coupling portion 7 </ b> C by being joined across each column 4 and the trunk difference 5.

  The fourth reinforcing body 1D is composed of a main reinforcing body 1D1 and one or more auxiliary reinforcing bodies 1D2, 1D3 combined with the main reinforcing body 1D1, as will be described in detail later. As shown in FIG. It is used for the fourth coupling part 7D formed by coupling the column 4, the waist difference 5, and the other end of the brace 6. In the fourth reinforcing body 1D, the main reinforcing body 1D1 is joined across the pillar 4, the trunk difference 5, and the brace 6, and the first auxiliary reinforcing body 1D2 is joined across the pillar 4 and the brace 6, Further, the second auxiliary reinforcing body 1D3 is joined over the trunk difference 5 and the brace 6 to reinforce the fourth coupling portion 7D. In the reinforcing body 1, the first reinforcing body 1A to the third reinforcing body 1C can be used interchangeably with the first coupling site 7A to the fourth coupling site 7D, and the fourth reinforcing body 1D can be used. It can be used interchangeably with the first binding site 7A.

  As described above, the base 3, the pillar 4, and the brace 6 are coupled to the first coupling portion 7 </ b> A. As shown in FIG. 2, the base 3 is attached to the first coupling portion 7 </ b> A by anchor bolts 8 provided at an appropriate interval on the foundation 2, and a column such as a tenon structure is attached to the base 3. 4 is erected. In the first coupling part 7A, although not described in detail, a grooving process is performed across the upper surface 3A of the base 3 and the side surface 4A of the pillar 4 which are orthogonal to each other, and a so-called large insertion is made in which the tip portion is fitted into the formed groove. The lower end of the brace 6 is joined by the structure or the like. In the first coupling portion 7A, nails 9 reaching the base 3 or the pillar 4 from the brace 6 are driven in, respectively, so that the brace 6 is prevented from coming off from the base 3 and the pillar 4.

  As described above, the column 4, the waist difference 5, and the brace 6 are coupled to the fourth coupling site 7 </ b> D. In the fourth coupling portion 7D, as shown in FIG. 7, the trunk difference 5 is fixed to the upper end portion of the column 4 in a horizontal state by a tenon structure or the like. In the fourth coupling portion 7D, although not described in detail, a so-called large insertion is made by grooving across the side surface 4A of the pillar 4 and the bottom surface 5A of the body difference 5 that are orthogonal to each other and fitting the tip into the formed groove. The upper end of the brace 6 is joined by the structure or the like. In addition, also in the 4th coupling | bond part 7D, although not shown in figure, the nails which reach the pillar 4 or the trunk difference 5 from the brace 6 are driven, respectively, so that the brace 6 is prevented from coming off from the pillar 4 or the trunk difference 5.

  The binding site 7 has a structure in which the second binding site 7B does not have the bracing 6 in the first coupling portion 7A described above, and the third binding site 7C has the bracing 6 in the fourth binding site 7D described above. There is no structure. Of course, each coupling portion 7 is not limited to the coupling structure of the first coupling portion 7A and the third coupling site 7C described above. Further, in the case where an appropriate reinforcing bracket is already provided for each connecting portion 7, the reinforcing body 1 can be attached without removing the reinforcing bracket.

  The reinforcing body 1 is configured by impregnating an epoxy resin adhesive 11 into a cellulose sponge body 10 formed using, for example, a cellulose sponge manufactured by Toray Fine Chemical or 3M. Cellulose sponge material is made of viscose obtained by chemically treating cellulose in natural pulp, like rayon and cellophane, and is a lump with bubbles formed inside by dissolution of crystal glass mixed with viscose. A material regenerated into cellulose. Cellulose sponge material has various properties such as water absorption, water retention, heat resistance, chemical resistance, biocompatibility, biodegradability, flexibility, etc., and is used in various fields such as kitchen household goods and automobile goods. Has been. The cellulose sponge material can be easily cut into an appropriate size by using, for example, a knife or the like, and can be cut into an appropriate shape, and can be formed into a predetermined shape in advance.

Cellulose sponge material is less expensive than aramid fibers used in the reinforcing sheet proposed as the prior art, and cellulose represented by the molecular formula of [C ₆ H ₇ O ₂ (OH) ₃ ] n is used. The main component. Cellulose has many OH groups compared to synthetic resin fibers such as aramid fibers, carbon fibers, glass fibers, etc., so that it reacts with an uncured epoxy resin adhesive to be impregnated as described later and an epoxy compound. It has the property of intermolecular cross-linking by adding to the oxygen atom.

  The reinforcing body 1 is an epoxy resin adhesive as compared with a cellulose sheet body made of a nonwoven fabric or the like previously provided by the applicant by forming the cellulose sponge body 10 using a cellulose sponge material having excellent water absorption characteristics. 11 penetration efficiency is improved. In the reinforcing body 1, the epoxy resin adhesive 11 is impregnated into the cellulose sponge body 10 in a short time in a uniform state, and the intermolecular crosslinking reaction described above occurs as a whole. Moreover, since the cellulose sponge body 10 reduces the dripping of the epoxy resin adhesive due to its water retention characteristics, the reinforcing body 1 is easy to handle and reduces the surrounding contamination due to dripping and the trouble of cleaning. Will come to be. Further, since the reinforcing body 1 uses the block-like cellulose sponge body 10, it is possible to assemble the cellulose sponge body 10 in a self-supporting manner at each coupling site 7 as will be described later, and the workability is greatly improved. The

  In the reinforcing body 1, the epoxy resin adhesive 11 impregnated in the cellulose sponge body 10 reacts with OH groups in the atmosphere and gradually cures as time passes, and polymerization with the OH groups of the cellulose sponge body 10 is performed. It forms an intermolecular cross-linked structure. The reinforcing body 1 firmly holds the bonding state of each structural member at each bonding site 7 by a large bonding force in a state where the epoxy resin adhesive 11 is sufficiently cured.

  The epoxy resin adhesive 11 is formed by polymerization of bisphenol A and epichlorohydrin as is well known, and a thermosetting resin having two or more epoxy groups in one molecule is used as a main agent. A curing agent composed of a bifunctional compound such as an amine such as an organic acid or an acid anhydride is used. The epoxy resin adhesive 11 is cured in a stable three-dimensional structure by opening a ring of an epoxy group and reacting with an OH group by mixing a curing agent with the main agent, resulting in cross-linking. The epoxy resin adhesive 11 is characterized by high hardness, small shrinkage at the time of curing, and strong adhesive strength, but high brittleness. In addition, you may make it use for the epoxy resin adhesive 11 what added low temperature reactive hardening accelerators, such as a tertiary amine, for example to the hardening | curing agent.

  As the epoxy resin adhesive 11, not only the two-component mixed epoxy resin adhesive described above but also a one-component epoxy resin adhesive may be used. As the one-pack type epoxy resin adhesive, for example, an epoxy resin type one-pack room temperature curable adhesive “Uni-Epo repair primer” manufactured by Konishi Co., Ltd. is used. This epoxy resin adhesive is a mixture of liquid bisphenol A type epoxy resin and curing agent ketimine mixed with calcium oxide, silica, and zinc oxide, and is cured by reacting with OH groups when exposed to the atmosphere. It has characteristics.

  The reinforcing body 1 may be formed by performing a pre-impregnation process in which the cellulose sponge body 10 is impregnated with an epoxy resin adhesive in a pre-process for assembling to each bonding site 7. It may be formed by performing a post-impregnation treatment in which the resin adhesive is impregnated, and may further be formed using a pre-impregnation treatment and a post-impregnation treatment depending on each bonding site 7. The reinforcing body 1 is subjected to a pre-impregnation treatment, for example, by filling an epoxy resin adhesive 11 in a suitable container and cutting the cellulose sponge material 10 formed into a predetermined shape into the container for a predetermined time. It is immersed and impregnated with the epoxy resin adhesive 11. Reinforcing body 1 is an epoxy resin that has been subjected to post-impregnation treatment by, for example, spraying using a spray gun in a state where cellulose sponge body 10 formed by cutting cellulose sponge material into a predetermined shape is assembled to bonding portion 7. The adhesive 11 is impregnated.

  The reinforcing body 1 may impregnate the cellulose sponge body 10 with the epoxy resin adhesive 11 not only by the above-described dipping method or spraying method but also by other appropriate methods. As the impregnation method, for example, an injection method in which an injection nozzle is injected into the cellulose sponge body 10 and pressure is applied from the injection nozzle to inject the epoxy resin adhesive 11 into the inside can be employed.

  The reinforcing body 1 is formed by cutting the cellulose sponge body 10 into, for example, a rectangular block-shaped cellulose sponge material having a predetermined thickness carried into the site with a knife or the like in accordance with each bonding site 7. . The reinforcing body 1 is joined to each of the structural members when the cellulose sponge body 10 is used at a site where two structural members are joined, such as the second binding site 7B and the third binding site 7C described above. Any shape having at least two joint surfaces of the first joint surface 12 and the second joint surface 13 may be used.

  Further, when the cellulose sponge body 10 is used at a site where three structural members are coupled, such as the first coupling site 7A and the fourth coupling site 7D described above, the reinforcing body 1 is bonded to each of these structural members. The first joint surface 12 to the third joint surface 14 are formed into a shape having three joint surfaces. The reinforcing body 1 has a first bonding surface 12 to a third bonding surface 14 having a predetermined size so that the cellulose sponge body 10 imparts a predetermined proof stress to each bonding site 7 as will be described later. It is formed with a predetermined thickness.

  In the first reinforcing body 1A shown in FIG. 2, the cellulose sponge body 10A is formed into a block body having a predetermined thickness with a substantially right triangle shape as a basic shape. In the first reinforcing body 1A, the cellulose sponge body 10A is joined to the upper surface 3A of the base 3 and the side surface 4A of the column 4 where the first side surface and the second side surface orthogonal to each other are orthogonal to each other. And the second bonding surface 13A. In the first reinforcing body 1A, the cellulose sponge body 10A has a third joint surface 14A in which one side surface in the thickness direction perpendicular to the first joint surface 12A and the second joint surface 13A is joined to the main surface 6A of the brace 6. Configure.

  In the first reinforcing body 1A, when the cellulose sponge body 10A increases the length LA of the first joint surface 12A, it often hits the anchor bolt 8 that fixes the base 3 to the foundation 2 and the height of the second joint surface 13A. When the height HA increases, it often hits the outlet box 16 (see FIG. 1) installed on the wall surface, and it becomes necessary to perform a cutting process or the like at the site, resulting in a reduction in efficiency. Accordingly, in the first reinforcing body 1A, the cellulose sponge body 10A has a length LA of the first joint surface 12A of about 120 mm to 130 mm and a height HA of the second joint surface 13A of 150 mm to 200 mm. It is preferable to form it to a height of about. Even when the first reinforcing body 1A is formed of the cellulose sponge body 10A with such outer dimensions, the first reinforcing body 1A can give a predetermined proof strength to the coupling portion 7 as described later.

  The first reinforcing body 1A configured as described above is impregnated with the epoxy resin adhesive 11 by, for example, pre-impregnating the cellulose sponge body 10A. In the first reinforcing body 1A, the first joint surface 12A is placed on the upper surface 3A of the base 3, the upper surface 3A is used as a reference surface, and the second joint surface 13A is pressed against the side surface 4A of the column 4 to be third joined. By pressing the surface 14 </ b> A against the main surface 6 </ b> A of the brace 6, the first coupling site 7 </ b> A is assembled. The first reinforcing body 1A is joined to the first coupling portion 7A while being in close contact with the upper surface 3A of the base 3, the side surface 4A of the column 4, and the main surface 6A of the brace 6.

  Since the first reinforcing body 1A constitutes a block body in which the cellulose sponge body 10A is impregnated with the epoxy resin adhesive 11 and integrated as described above, the characteristics of the cellulose sponge body 10A and the epoxy resin adhesive 11 are included. Is exerted so that it has a large mechanical resistance against a tensile force and a compressive force and has a certain degree of elasticity. The first reinforcing body 1A exhibits a greater binding force as compared with the sheet body based on the synthetic resin fiber sheet disclosed in each of the above-mentioned prior applications, and the binding force is limited in the fiber direction. It is never done. Therefore, even when a large force is applied to the first coupling portion 7A due to the pitching or rolling caused by a large earthquake, the first reinforcing body 1A is maintained in the joined state. The first reinforcing body 1A prevents the pillar 4 from coming out of the base 3 and prevents the brace 6 from coming out from the base 3 and the pillar 4, thereby improving the earthquake resistance.

  Although the first reinforcing body 1A is provided in the first binding site 7A as described above, it is needless to say that the first reinforcing body 1A may be provided in the other second binding sites 7B to 4D. Since the first reinforcing body 1A has a predetermined thickness, the first reinforcing body 1A can be assembled in a self-supporting state at each coupling site 7, but for example, when assembled to the upper third coupling site 7C or the fourth coupling site 7D. Needs to be held so as not to fall until the epoxy resin adhesive 11 is cured. Therefore, it is preferable that the first reinforcing body 1A temporarily fixes the cellulose sponge body 10A to the column 4, the trunk difference 5, or the brace 6 with a temporary fixing nail in the case of such use example.

  In the second reinforcing body 1B shown in FIG. 3, the cellulose sponge body 10B is formed in a block body having a vertically long rectangular shape and a predetermined thickness. In the second reinforcing body 1B, the cellulose sponge body 10B is formed into a vertically elongated rectangle by slicing a long cellulose sponge material having a width of LB and a height of HB carried into the site into a predetermined thickness. As for the 2nd reinforcement body 1B, the cellulose sponge body 10B is joined across the surface 2A of the foundation 2, the surface 3B of the base 3, and the surface 4B of the pillar 4 which comprise the substantially identical surface.

  As described above, in the second reinforcing body 1B, the main surface of the cellulose sponge body 10B constitutes the first bonding surface 12B and the second bonding surface 13B described above. The second reinforcing body 1B can be joined to the base 3 and the pillar 4 with a large joining area as compared with the first reinforcing body 1A described above. The combined state of the pillars 4 is more reliably maintained. The second reinforcing body 1B prevents the base 3 from dropping off from the foundation 2 and the pillar 4 from coming off from the base 3 at the second coupling site 7B.

  In addition, although the 2nd reinforcement body 1B was used in the aspect joined across the foundation 2, the base 3, and the pillar 4 by making the main surface of the cellulose sponge body 10B into a joining surface as mentioned above, it is not limited to this use aspect. Of course. The second reinforcing body 1B may be in a usage mode in which the cellulose sponge body 10B is joined across the base 3 and the pillar 4 that are orthogonal to each other. In this case, the orthogonal side surface of the cellulose sponge body 10B is the first bonding surface. 12B and the 2nd joint surface 13B will be comprised.

  Further, the second reinforcing body 1B may be used also for the upper third coupling part 7C and the fourth coupling part 7D, and more reliably holds the coupled state of the column 4, the trunk difference 5, and the brace 6. . In the case of this use example, the second reinforcing body 1B is also preferably temporarily fixed to the column 4, the trunk difference 5, or the brace 6 with the cellulose sponge body 10A by a temporary fixing nail.

  In the third reinforcing body 1C shown in FIG. 4, the cellulose sponge body 10C is connected to the column 4 where the beam 6 is not present and the body difference 5 are orthogonally connected to each other like the first connecting portion 7A described above. Used for site 7C. In the third reinforcing body 1C, the cellulose sponge body 10C has a first joining piece 1C1 and a second joining piece 1C2 having a prescribed thickness and a prescribed length, integrally connected in an orthogonal state. As a result, the whole is formed into a substantially L-shaped block body. In the third reinforcing body 1C, the first joining piece portion 1C1 and the second joining piece portion 1C2 are configured with the first joining surface 12C and the second joining surface 13C as the outer side surfaces, respectively. It joins to the pillar 4 and the trunk | drum 5 which are mutually couple | bonded orthogonally in the site | part 7C. Needless to say, the third reinforcing body 1 </ b> C may be joined across the base 3 and the pillar 4.

  The third reinforcing body 1C is provided with a meat stealing recess 15 by cutting off a hypotenuse connecting the first joint surface 12C and the second joint surface 13C within a range that does not impair conditions for imparting a predetermined proof stress. The third reinforcing body 1C is formed into a wedge-shaped block body by forming the meat stealing recess 15 by cutting it into a substantially triangular shape so that the thickness gradually increases from the tip of the oblique side toward the right-angled corner. . The third reinforcing body 1C is configured such that the volume is reduced by forming the cellulose sponge body 10C in such a shape, and the usage amount of the cellulose sponge material and the epoxy resin adhesive 11 can be reduced. The

  Further, in the third reinforcing body 1C, due to the shape of the meat stealing recess 15, the constituent portions of the first joint surface 12C and the second joint surface 13C are reduced in thickness, and there is a risk that the predetermined strength cannot be achieved. In the 3rd reinforcement body 1C, when it has the length LA and height HA which were demonstrated in 1 A of the 1st reinforcement body 1A, the meat stealing recessed part 15 which opposes the 1st joint surface 12C and the 2nd joint surface 13C It is preferable that each of the constituent surfaces is an angle larger than 35 °.

  A reinforcing body 1E shown in FIG. 5 is a modified example of the above-described third reinforcing body 1C, and has a first joining piece 1E1 and a second joining piece 1E2 having a prescribed thickness and a prescribed length. Are integrally formed in an orthogonal state to form a substantially L-shaped block body as a whole. In the reinforcing body 1E, the first joining piece portion 1E1 and the second joining piece portion 1E2 are configured with the outer surfaces of the first joining piece portion 1E1 and the second joining piece portion 1E2 as the first joining surface 12E and the second joining surface 13E, respectively. It is joined to the pillar 4 and the trunk difference 5 which are coupled orthogonally to each other.

  Reinforcing body 1E can reduce the amount of cellulose sponge material and epoxy resin adhesive 11 used by reducing the volume even more than the above-described third reinforcing body 1C. In addition, the reinforcing body 1E, when there is a possibility that cracks may occur from a portion facing the right-angled corner portion with respect to a large load due to the reduced width of the first joint piece 1E1 and the second joint piece 1E2. The first reinforcing body 1A and the second reinforcing body 1B described above may be used in combination.

  As described above, the fourth reinforcing body 1D includes the main reinforcing body 1D1 and the auxiliary reinforcing bodies 1D2, 1D3 combined with the main reinforcing body 1D1. As for 4th reinforcement body 1D, main reinforcement body 1D1 forms the cellulose sponge body 10D1 in the block body of a right triangle shape, as shown in FIG. The main reinforcing body 1D1 is joined to the side surface 4A of the column 4 and the bottom surface 5A of the trunk difference 5 (or the top surface 3A of the base 3) of the cellulose sponge body 10D1 whose first side surface and second side surface are orthogonal to each other. The first joint surface 12D11 and the second joint surface 13D11 are configured. The main reinforcing body 1D1 includes a cellulose sponge body 10D1 having a third joint surface 14D11 in which one side surface in the thickness direction perpendicular to the first joint surface 12D11 and the second joint surface 13D11 is joined to the main surface 6A of the brace 6. Constitute.

  The main reinforcing body 1D1 is described above so that the cellulose sponge body 10D1 can be installed avoiding the anchor bolt 8 and the outlet box 16 without performing any additional work on the column 4 and the trunk difference 5 (or the base 3). The outer dimensions of the first reinforcing body 1A are substantially the same. The main reinforcing body 1D1 has a third joint surface 14D11 larger than the first reinforcing body 1A, and further reinforces the fourth coupling portion 7D in cooperation with the auxiliary reinforcing bodies 1D2 and 1D3. Is possible.

  The first auxiliary reinforcing body 1D2 is formed in a small substantially triangular block body in which the cellulose sponge body 10D2 is substantially the same shape as the triangular first space portion 17A configured between the pillar 4 and the brace 6. . As shown in FIG. 7, the auxiliary reinforcing body 1 </ b> D <b> 2 is loaded in the first space portion 17 </ b> A and the cellulose sponge body 10 </ b> D <b> 2 is temporarily fixed to the column 4 by, for example, a temporary fixing nail 18. In this state, the first auxiliary reinforcing body 1D2 constitutes a first joint surface 12D21 in which the first side surface of the cellulose sponge body 10D2 is joined to the side surface 4A of the column 4. In addition, the first auxiliary reinforcing body 1D2 constitutes a second joint surface 13D21 in which the second side surface of the cellulose sponge body 10D2 is joined to the side surface 6B of the brace 6 in this state.

  Similarly, the second auxiliary reinforcing body 1D3 has substantially the same shape as the triangular second space portion 17B formed between the cellulose sponge body 10D3 and the bottom surface 5A of the trunk difference 5 (or the upper surface 3A of the base 3). It is formed into a small, substantially triangular block body. As shown in FIG. 7, the second auxiliary reinforcing body 1D3 is also loaded in the second space 17B, and the cellulose sponge body 10D3 is temporarily fixed to the trunk difference 5 by, for example, a temporary fixing nail 18. In this state, the second auxiliary reinforcing body 1D3 constitutes a first joint surface 12D31 in which the first side surface of the cellulose sponge body 10D3 is joined to the bottom surface 5A of the trunk difference 5. Further, the second auxiliary reinforcing body 1D3 constitutes a second joint surface 13D31 in which the second side surface of the cellulose sponge body 10D3 is joined to the side surface 6C of the brace 6 in this state.

  The 4th reinforcement body 1D comprised as mentioned above is assembled | attached to 4th coupling | bond part 7D. As shown in FIG. 7, the fourth reinforcing body 1 </ b> D has the first auxiliary reinforcing body 1 </ b> D <b> 2 loaded in the first space 17 </ b> A and temporarily fixed to the column 4 by the temporary fixing nail 18, and the second auxiliary reinforcing body 1 </ b> D. The body 1D3 is loaded in the second space 17B and temporarily fixed to the trunk difference 5 by the temporary nail 18. Note that the fourth reinforcing body 1D is formed so that the first auxiliary reinforcing body 1D2 and the second auxiliary reinforcing body 1D3 form substantially the same surface as the main surface 6A of the brace 6 as shown in FIG. It is preferable that the first space portion 17A and the second space portion 17B are assembled.

  In this state, the fourth reinforcing body 1D is configured such that the main reinforcing body 1D1 presses the first joint surface 12D11 against the side surface 4A of the column 4 as shown by the arrow in FIG. The third joint surface 14D11 is pressed against the main surface 6A of the brace 6 and the main surfaces of the first auxiliary reinforcing body 1D2 and the second auxiliary reinforcing body 1D3. The fourth reinforcing body 1D is combined with the main reinforcing body 1D1 by preventing the falling from the fourth coupling portion 7D by driving the temporary nail 18 as shown in FIG.

  In this state, the fourth reinforcing body 1D is different from the main reinforcing body 1D1, the first auxiliary reinforcing body 1D2, and the second auxiliary reinforcing body 1D3 from the spray gun 19 to the epoxy resin adhesive 11 as shown in FIG. Is sprayed. As described above, in the fourth reinforcing body 1D, the main reinforcing body 1D1, the first auxiliary reinforcing body 1D2, and the second auxiliary reinforcing body 1D3 are formed of cellulose sponge bodies 10D1, 10D2, and 10D3, respectively, using a cellulose sponge material. Thus, the sprayed epoxy resin adhesive 11 is efficiently impregnated into the respective interiors.

  The fourth reinforcing body 1D is composed of the main reinforcing body 1D1, the first auxiliary reinforcing body 1D2, and the second auxiliary reinforcing body 1D3. The connecting portion between the column 4, the trunk difference 5, and the brace 6 constituting the fourth connecting portion 7D. The block body which covers and is integrated is configured. The fourth reinforcing body 1D is a block body that exhibits the characteristics of the cellulose sponge body 10 and the epoxy resin adhesive 11, and has a large mechanical resistance against tensile force and compressive force as a whole and also has a certain degree of elasticity. Configure. Therefore, the fourth reinforcing body 1D firmly holds the bonding state with respect to the structural members 4 to 6 even when a large force is applied to the fourth coupling portion 7D due to the pitching or rolling caused by a large earthquake. And improve earthquake resistance.

  In addition, although the 4th reinforcement body 1D was provided in 4th coupling | bond part 7D as mentioned above, of course, you may provide in other 1st coupling | bond part 7A-3rd coupling | bond part 7C. In the fourth reinforcing body 1D, the epoxy resin adhesive 11 is impregnated by the post-impregnation process by spraying using the spray gun 19, but the pre-impregnation process is performed and the epoxy resin adhesive 11 is impregnated. You may make it assemble | attach to 4th coupling | bond part 7D. In the case where the fourth reinforcing body 1D is subjected to the pre-impregnation process and is assembled to the lower first coupling site 7A or the second coupling site 7B, the temporary fastening with the temporary nail 18 may be unnecessary.

  The fourth reinforcing body 1D is formed in a substantially right triangle shape by cutting the cellulose sponge material by the main reinforcing body 1D1, but has the same shape as the first reinforcing body 1A to the third reinforcing body 1C described above. Of course, the formed one may be used. The fourth reinforcing body 1D uses the cut portion of the meat stealing recess 15 when the main reinforcing body 1D1 is formed with the meat stealing recess 15 like the first reinforcing body 1A described above, for example. By forming the first auxiliary reinforcing body 1D2 and the second auxiliary reinforcing body 1D3, the yield of the cellulose sponge material can be improved.

  In the building, the brace 6 coupled to the base 3 and the pillar 4 is configured so that the coupled state is maintained even when the pulling force is applied due to an earthquake or the like. Is done. For the reinforcement 1 described above and Comparative Examples 1 to 3 of the conventional method, a comparative experiment of the proof strength of the brace 6 coupled to the base 3 and the column 4 was performed, and the result shown in FIG. Obtained. It has been confirmed that the reinforcing body 1 constitutes a binding site 7 having sufficient strength even when a pulling force of 26 kN is applied to the brace 6.

  In the comparative experiment, the base 3 and the pillar 4 and the pillar 4 and the trunk difference 5 are fixed with hole-down hardware so that a predetermined yield strength, that is, the yield strength to be obtained is obtained at the joint portion. The amount of horizontal displacement δ (mm) when the force T was applied was measured. In the comparative experiment, a structural member having the same material and the same size, that is, a reinforcing body in a joint portion 7 in which a brace 6 made of a straw material having a cross-sectional dimension of 45 mm × 90 mm is coupled to a base 3 of a straw material and a pillar 4 of a cedar The proof stress comparison of Comparative Example 1 to Comparative Example 3 with No. 1 and the conventional structure was performed. In FIG. 10A, the vertical axis represents the pulling force (kN) of the brace 6 and the horizontal axis represents the horizontal displacement δ (mm).

  In the comparative experiment, the length dimension L of the first joint surface 12 is 140 mm, the height dimension H of the second joint surface 13 is 250 mm, and the overall thickness is 45 mm. As a whole, like the second reinforcing body 1B described above. A reinforcing body 1 formed in a vertically long rectangle was used, and the reinforcing body 1 was joined by impregnating an epoxy resin adhesive 11 across the base 3, the pillars 4 and the braces 6 as shown in FIG. The reinforcing body 1 obtained the test result shown with the a line of the figure (A). In the reinforcing body 1, the maximum proof stress was 35.0 kN, and the base 3 was split in a state where the joint portion of the brace 6 was held.

  In Comparative Example 1, as shown in FIG. 10 (C), the brace 6 having its tip cut off was nailed to the base 3 and the column 4 respectively. In Comparative Example 1, the test result indicated by the b line in FIG. In Comparative Example 1, the maximum proof stress was about 6.3 kN, the nail was pulled out, and the bracing 6 was easily pulled out from the base 3 and the pillar 4.

  In Comparative Example 2, as shown in FIG. 10 (D), the brace 6 with its tip cut off is joined to the base 3 and the pillar 4 by a large insertion structure and is nailed, and the conventional building standard method is adopted. It is a defined structure. In Comparative Example 2, the test result indicated by the c line in FIG. Also in Comparative Example 2, the maximum proof stress was about 6.9 kN, the nail was pulled out, and the bracing 6 was easily pulled out from the base 3 and the pillar 4.

  In Comparative Example 3, as shown in FIG. 10 (E), three metal bracing plates 20 formed in accordance with the current Building Standards Law are provided for the base 3 and five for the pillars 4. This is a structure that is fixed to 6 with 7 nails. In Comparative Example 3, the test result indicated by the d line in FIG. In Comparative Example 3, the maximum proof stress was 25.6 kN and the proof strength was great, but the brace 6 was broken.

  As is clear from the comparative experiment described above, the reinforcing body 1 holds the bonding portion 7 with a greater proof strength than the metal bracing plate 20.

It is structure explanatory drawing which assembled | attached the reinforcing body shown as embodiment to the coupling | bond part of each structural member of a building. It is a principal part disassembled perspective view which reinforces the coupling | bond part of a base, a pillar, and a bracing using the 1st reinforcement body shown as 1st Embodiment. It is a front view of a 2nd reinforcement body. It is a front view of a 3rd reinforcement body. It is a front view which shows the modification of a 3rd reinforcement body. It is a perspective view of the main reinforcement body and auxiliary reinforcement body which comprise a 4th reinforcement body. It is a principal part disassembled perspective view which reinforces the joint part of a pillar, a trunk difference, and a bracing the said 4th reinforcement body. It is a principal part perspective view of the state which assembled | attached the said 4th reinforcement body to the coupling | bond part. It is explanatory drawing of the post-impregnation process process which sprays and impregnates an epoxy resin adhesive with respect to the said 4th reinforcement body. It is explanatory drawing and the figure which showed the comparison experiment of a reinforcement body and the conventional construction method.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Reinforcement body, 2 foundation, 3 bases, 4 pillars, 5 waist differences, 6 bracing, 7 joint part, 10 cellulose sponge body, 11 epoxy resin adhesive, 12 1st joint surface, 13 2nd joint surface, 14 3rd Joint surface, 15 meat stealing recess, 17 space, 18 temporary peg, 19 spray gun

Claims (9)

A sponge material is used as a raw material and has a first joint surface and a second joint surface facing the joint part of at least one set of structural members to which the building is joined, and is formed into a block shape, and an epoxy resin adhesive Composed of impregnation,
A reinforcing body for a building which reinforces the joint portion by joining the first joint surface and the second joint surface to opposing joint portions of the structural members. A building comprising a first structural member and a second structural member, which are made of a sponge material, and which are coupled at right angles, and a third structural member which is coupled at a coupling site between the first structural member and the second structural member. Used for
At least the first structural member to the third structural member have a first joint surface to a third joint surface that are opposed to the coupling sites of the first structural member to the third structural member. Configured,
The building is characterized in that the first joint surface to the third joint surface are joined across the joint portions opposite to each other of the first structural member to the third structural member to reinforce the joint portions. Reinforcing body.   The building reinforcing body according to claim 1 or 2, wherein the building reinforcing body is formed in a block body having a substantially right triangle shape.   4. The building reinforcing body according to claim 3, wherein a meat stealing recess is formed in the oblique side. A first material that is formed using a sponge material and impregnated with an epoxy resin adhesive, and is inserted into a first gap portion that is formed between the joint portions of the first structural member and the third structural member. An auxiliary reinforcement,
A second material is formed using a sponge material and impregnated with an epoxy resin adhesive, and is inserted into a second gap portion formed between the joint portions of the second structural member and the third structural member. An auxiliary reinforcement,
The building reinforcing body according to any one of claims 2 to 4, wherein the two are combined and used.   6. The building reinforcing body according to claim 1, wherein the structural member is nailed and temporarily fixed to each structural member.   The reinforcing member for a building according to any one of claims 1 to 6, wherein the epoxy resin adhesive is sprayed and impregnated in a state of being attached to a joint portion of the structural member.   The building reinforcing body according to any one of claims 1 to 6, wherein the epoxy resin adhesive is impregnated by being immersed in the epoxy resin adhesive. A sponge material is used as a raw material and has a first joint surface and a second joint surface facing the joint part of at least one set of structural members to which the building is joined, and is formed into a block shape, and an epoxy resin adhesive Reinforcement for buildings constructed by impregnating
The building is reinforced by joining the first joint surface and the second joint surface to the opposing joint portions of the structural members, respectively, with respect to the reinforcing body for building. Reinforcement method of things.

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