JP2011137311A - Reinforcing fitting for wooden building, and method for reinforcing wooden building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reinforce newly-built and existing wooden buildings of framework structure at a low cost and to reinforce them while permitting a certain degree of deformation to the horizontal force of an earthquake or the like. <P>SOLUTION: A reinforcing fitting 6 is mounted between two adjacent columns of the wooden building constructed combining wooden columns 3, 4 and horizontal members 5. The reinforcing fitting includes a first vertical member 11 vertically mounted to one of the two adjacent columns; a second vertical member 12 mounted to the other column 4; and a horizontal member 13 with both ends connected to the first vertical member and the second vertical member so that bending moment can be transmitted. The horizontal member is adjusted in flexural rigidity near connection parts to the first vertical member and the second vertical member to cause plastic deformation when the columns incline. One or more of such reinforcing fittings are mounted to the upper and lower sides to form a rigid-frame structure with the two columns 3, 4 and reinforcing fittings 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a reinforcing metal fitting for reinforcing a wooden building against a horizontal force acting on the wooden building and a method for reinforcing the wooden building.

  In so-called framed wooden structures, which are mainly constructed with columns and horizontal members such as beams and trunks, it is possible to reinforce and reinforce bracing or steel braces against horizontal forces such as earthquakes. Widely done. In many cases, a load-bearing face member is attached to a rectangular portion surrounded by two columns erected so as to be adjacent to each other and a horizontal member such as a trunk difference or a base, and reinforced as a seismic wall.

  On the other hand, it is widely known that by using an oil damper, a viscoelastic damper, or a metal member that is plastically deformed, a seismic energy is absorbed as a so-called seismic control structure, and the building is safe against earthquakes. And as a damping structure, there exists a thing proposed by patent document 1, patent document 2, patent document 3, etc., for example.

  In order to enhance the safety of existing wooden buildings against earthquakes, the structure that can resist horizontal forces such as earthquakes is adopted in newly constructed wooden buildings as described above. Widely done.

JP 2003-301624 A JP 2006-152788 A JP-A-2005-42403

  The braces and the steel braces need to be installed on a diagonal line of a rectangular portion surrounded by two pillars and a horizontal member constructed above and below the pillars. For this reason, when reinforcing existing wooden buildings, it is necessary to dismantle not only the walls between the columns where they are installed, but also the ceiling. Moreover, when there is a long press in a Japanese-style room, it is necessary to remove this. Even when reinforcing a load bearing member on a rectangular part surrounded by two pillars and a horizontal member installed above and below this pillar, the load bearing member must be secured to the pillar and the upper and lower members. However, it is necessary to dismantle the ceiling and long press. For this reason, much expense is needed for reinforcement. And it cannot install in the part in which an opening is provided.

  Also, in the structure that resists horizontal force by providing a horizontal member called pierced between the columns, it resists collapse of the column while allowing some deformation, When reinforcement is performed using the bracing or the load bearing face as described above, the reinforcement portion is constrained so that deformation is reduced even when a horizontal force is applied, and the rigidity of the building is biased. For this reason, it becomes difficult for both the braces provided in the building and the load-bearing face material and the penetrator to share the balance and resist the horizontal force during an earthquake.

  On the other hand, to make a vibration control structure, the production cost of oil dampers and viscoelastic dampers is high, and a lot of costs are required for both newly constructed buildings and reinforcement of existing buildings.

  The invention according to the present application has been made in view of the circumstances as described above, and the purpose of the invention is to be able to reinforce a new construction of a frame structure and an existing wooden building at a low cost, and to provide horizontal force such as an earthquake. It is an object to provide a reinforcing metal fitting and a reinforcing method that can be reinforced while allowing a certain degree of deformation.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a reinforcing member for a wooden building constructed by combining a wooden column and a horizontal member, and is a surface of two adjacent columns facing each other. A first vertical member and a second vertical member fixed to each of the first vertical member and a horizontal member that horizontally joins the first vertical member and the second vertical member, and the column is inclined. The present invention provides a reinforcing member for a wooden building that resists the inclination of the column by a bending moment generated at a joint portion between the vertical member and the horizontal member.

In this reinforcing metal fitting, a rigid frame structure is formed by two pillars and a horizontal member of the reinforcing metal fitting by attaching between two adjacent pillars. Thereby, the bending rigidity of the horizontal member and the column resists the deformation of the ramen structure, and the wooden building is effectively reinforced against the horizontal force due to an earthquake or the like. Further, the reinforcing metal fitting has a simple configuration and can be manufactured at low cost. Therefore, it is possible to reinforce a new or existing wooden building at a low cost.
On the other hand, the area occupied in the vertical direction when this reinforcing metal fitting is attached is small, and can be reinforced while avoiding the positions where the openings and other members are provided. Therefore, it is not necessary to dismantle many of the ceiling, floor, long press, duck, etc. for existing wooden buildings, but it is possible to attach reinforcing metal fittings only to partial dismantling.
Furthermore, with this reinforcing bracket, when a horizontal force is applied to the attached wooden building, it will resist the deformation of the pillars etc. due to the bending rigidity of the constituent members. It resists horizontal force while allowing large deformations. Thereby, the reinforcement which used effectively the penetration function used in the old private house etc., and the reinforcement which used together with other seismic control devices, etc. are attained.

  The invention according to claim 2 is the reinforcing member for a wooden building according to claim 1, wherein the horizontal member has a bending rigidity in the vicinity of a joint portion between the first vertical member and the second vertical member. It is adjusted so that plastic deformation occurs when the column is inclined.

  When a horizontal force in a direction parallel to the wall is applied to the wall to which the reinforcing bracket is attached, the horizontal member of the reinforcing bracket generates the largest bending moment in the vicinity of the connecting portion with the vertical member. And a plastic deformation arises in the joint part vicinity with the vertical member of a horizontal member in the state where the pillar until the collapse of a building inclines. As a result, the vicinity of the joint between the horizontal member and the vertical member functions as a so-called plastic hinge, and when a horizontal force of seismic motion acts, the graph showing the relationship between the bending moment and the bending deformation becomes a loop, and this hysteresis causes the seismic motion. Absorbs energy. That is, the reinforcing metal fitting functions as a vibration control device, and suppresses vibration of the wooden building, thereby improving safety against earthquake motion.

  The invention according to claim 3 is the reinforcing member for a wooden building according to claim 1 or 2, wherein the horizontal member is in the vicinity of a joint portion between the first vertical member and the second vertical member. And a rigidity-reducing portion with reduced bending rigidity, and the plastic deformation occurs in the rigidity-reducing portion.

  In this reinforcing metal fitting, when a horizontal force such as an earthquake is applied, it is possible to limit the range to the rigidity reducing portion and cause plastic deformation. Moreover, the bending rigidity of this part can be adjusted easily. Thereby, it becomes possible to adjust so that a rigidity reduction part may act effectively as a plastic hinge.

  The invention according to claim 4 is the reinforcing member for a wooden building according to claim 1, claim 2 or claim 3, wherein the horizontal member is obtained by connecting two members, and connecting the two members. The part can be connected by adjusting the length in the axial direction.

  In this reinforcing metal fitting, it becomes easy to attach so that it may closely contact between the side surfaces which two adjacent pillars oppose. And it attaches to a pillar exactly closely, acts effectively with respect to a deformation | transformation of a wooden building, and the reinforcement effect is acquired.

  The invention according to claim 5 is the reinforcing member for a wooden building according to claim 4, wherein each of the two members constituting the horizontal member can transmit a bending moment with one wooden member. It is assumed that they are firmly connected and connected via the wooden member.

  With this reinforcement bracket, the length of the wooden member can be changed at the installation site, and it can be easily attached even when the distance between two adjacent pillars is different, and can be attached in close contact with both pillars. it can. In addition, the two members constituting the horizontal member are integrated with the wooden member, and form a ramen structure together with the pillar.

  The invention which concerns on Claim 6 is the reinforcement method of the wooden building constructed | assembled combining a wooden pillar and a horizontal member, Comprising: The 1st vertical member arrange | positioned to a perpendicular direction, This 1st vertical A reinforcing metal fitting having a second vertical member arranged in parallel with the member, and a horizontal member whose both ends are coupled to the first vertical member and the second vertical member so that a bending moment can be transmitted, It is arranged between two adjacent pillars, and the first vertical member and the second vertical member are fixed to each of the opposing surfaces of the two pillars, and the two pillars and the horizontal member serve as a ramen structure. The present invention provides a method for reinforcing a wooden building.

In this reinforcing method, the frame structure formed by the two columns and the horizontal member of the reinforcing bracket resists horizontal force parallel to the wall between the two columns. As a result, the wooden building is effectively reinforced against horizontal force due to an earthquake or the like. Reinforcing metal fittings can be manufactured at low cost, and for existing wooden buildings, rather than dismantling the ceiling, floor, long press, duck, etc., only partial dismantling is required. Can be attached.
Furthermore, this reinforcing metal fitting can be attached while avoiding the position where the opening or other member is provided up and down, and the degree of freedom of the attachment position is increased. In addition, it resists horizontal force while allowing greater deformation than reinforcement using bracing or load bearing materials, and it makes use of the piercing function used in old private houses and other controls. Reinforcement in combination with seismic devices is also possible.

  The invention according to claim 7 is the method for reinforcing a wooden building according to claim 6, wherein the horizontal member of the reinforcing bracket is in the vicinity of a joint portion between the first vertical member and the second vertical member. The bending rigidity is adjusted so that plastic deformation occurs when the column is inclined.

  In this reinforcing method, a so-called plastic hinge is generated in the horizontal member of the reinforcing metal fitting during an earthquake, and the reinforcing metal fitting can function as a vibration control device. As a result, it is possible to absorb the energy of the earthquake motion and suppress the vibration of the wooden building to improve the safety against the earthquake motion.

  The invention according to claim 8 is the method for reinforcing a wooden building according to claim 6 or claim 7, wherein a plurality of the reinforcing metal fittings are provided between the lower end and the upper end of two adjacent pillars. .

  In this reinforcing method, a multi-layered ramen structure is formed by a plurality of reinforcing metal fittings and two adjacent columns, and a wall having a large load resistance is formed.

  The invention according to claim 9 is the method for reinforcing a wooden building according to claim 6 or 7, wherein the reinforcing metal fitting is in the waist wall below the window provided between the two columns and / or. It shall be installed in the hanging wall above the window.

  In this reinforcing method, it is possible to reinforce against an earthquake or the like by using a wall that has a window and cannot be fitted with braces or braces.

  The invention according to claim 10 is the method for reinforcing a wooden building according to claim 6 or claim 7, wherein the reinforcing metal fitting is attached below the peripheral edge of the ceiling above the long press between the two columns. And

  In this reinforcement method, in an existing wooden building, it is possible to attach a reinforcing metal fitting without dismantling the long press provided or the peripheral edge of the ceiling, and it is possible to reinforce with fewer dismantling parts. . Further, even if the lower side of the long press is an opening, it can be reinforced by attaching a reinforcing metal fitting.

  The invention according to claim 11 is the method for reinforcing a wooden building according to any one of claims 6 to 10, wherein a vertical splint is attached to the pillar, and the reinforcing metal fitting includes the splint. It shall stick to the pillar via.

  In this reinforcing method, the face material forming the wall can be attached to a position where the column is retracted from the side surface on the side of the room to the center side of the wall, and a so-called true wall can be obtained. And a reinforcement metal fitting can be attached in this true wall.

  As described above, in the reinforcing member for a wooden building and the reinforcing method for a wooden building according to the present invention, it is possible to reinforce the existing wooden building with fewer parts to be disassembled. Moreover, both new construction and existing wooden buildings can be reinforced against horizontal forces such as earthquakes at low cost. In addition, it is possible to reinforce the structure of a wooden building with greater tolerance than reinforcement with braces and load-bearing face materials, making effective use of the characteristics of existing wooden buildings and the vibration control function of newly built wooden buildings. Can be reinforced.

It is the schematic side view and schematic sectional drawing which show a part of structure housing to which the reinforcement method of the wooden building which concerns on this invention was applied. It is the side view, sectional drawing, and top view which show the attachment state of the reinforcement metal fitting which is one Embodiment of this invention. FIG. 2 is a bending moment diagram of a multi-layered rigid frame structure including the structural housing and the reinforcing metal fitting shown in FIG. 1. It is a side view which shows the connection part of the horizontal member of the reinforcement metal fitting shown in FIG. It is the side view, sectional drawing, and top view which show the reinforcement metal fitting which is other embodiment of this invention. It is the side view, sectional drawing, and top view which show the reinforcement metal fitting which is other embodiment of this invention. It is the side view, sectional drawing, and top view which show the reinforcement metal fitting which is other embodiment of this invention. It is the schematic side view and schematic plane sectional view which are the other examples of the structural frame to which the reinforcement method of the wooden building which concerns on this invention was applied, and showed the example which attached the reinforcement metal fitting through the splint. FIG. 9 is a side view, a cross-sectional view, and a plan view showing a mounting state of a reinforcing metal fitting in the structural housing shown in FIG. 8. It is the schematic side view and schematic sectional drawing which show the other example of the state by which the reinforcement metal fitting was attached by the reinforcement method of this invention. It is the schematic side view and schematic sectional drawing which show the other example of the state by which the reinforcement metal fitting was attached by the reinforcement method of this invention. It is the schematic side view and schematic plan view which show the other example of the state to which the reinforcement metal fitting was attached by the reinforcement method of this invention. It is the schematic side view and schematic plane sectional view which show the state where the reinforcement metal fitting was attached by the reinforcement method of this invention other examples.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic side view and a schematic sectional view showing a part of a structural frame to which a reinforcing method for a wooden building according to the present invention is applied. FIG. 2 is a side view of a reinforcing metal fitting used in this reinforcing method. They are sectional drawing and a top view.
This wooden building is constructed as a frame structure, and supports a base 2 in a lateral direction on a foundation 1, and a plurality of columns 3 and 4 are erected thereon. And it supports so that the horizontal members 5, such as a trunk difference and a beam, may be bridged on these pillars 3 and 4. A rectangular area surrounded by the columns 3 and 4, the horizontal member 5 and the base 2 is defined as a wall. While forming the outer wall of such a structure around a building, the partition wall between living rooms is also formed with the same structure. If the wooden building is a one-story building, a hut set is provided on top of this to form a roof. In the case of a two-story or three-story building, a column is further erected on the horizontal member, and the horizontal member is bridged. Then, a roof is formed on the top floor.

  A plurality of reinforcing metal fittings 6 are attached in a vertical arrangement between two pillars 3 and 4 that are erected so as to be adjacent to each other. The reinforcing metal fitting 6 includes a first vertical member 11 and a second vertical member 12 that are fixed to each of the mutually opposing surfaces of the two adjacent columns 3 and 4, and the first vertical member 11 and the second vertical member 12. The horizontal member 13 which joins the vertical member 12 to a horizontal direction is provided. The first vertical member 11 and the second vertical member 12 are made of a steel material having an L-shaped cross section, and can be inserted through a screw or a lag screw 14 in a surface abutting against the columns 3 and 4. Is provided. And the horizontal member 13 is couple | bonded by the welding in the substantially right angle direction at the substantially center part of the up-down direction.

  The horizontal member 13 is formed by connecting two members made of a steel material having a U-shaped cross section at a central portion, and as shown in FIG. 2, a flat plate-like shape is formed at the end where the two members 13a and 13b are connected. A connecting portion 13c is formed. The connecting portion 13c is provided with a plurality of bolt holes, and an attachment plate 15 provided with elongated holes so as to correspond to these bolt holes is superimposed on both the connecting portions 13c, and the bolt 16 is connected to the connecting portion. The bolt holes 13c and the elongated holes of the attachment plate 15 can be inserted. Therefore, the two members 13a and 13b can be connected by screwing and tightening a nut to the bolt 16.

  In the horizontal member 13, a rigidity reducing portion 13 d in which the bending rigidity of the cross section is reduced is formed in the vicinity of the joint portion between the first vertical member 11 and the second vertical member 12. The bending rigidity is adjusted by cutting out a flange 13f extending horizontally from the upper and lower edges of a vertical portion having a U-shaped cross section, that is, a portion corresponding to the web 13e. Thereby, when the inclination of the columns 3 and 4 is increased, the stress acting on the rigidity reducing portion 13d of the horizontal member enters the plastic region and is adjusted so as to function as a plastic hinge.

  Such a reinforcing metal fitting 6 abuts the first vertical member 11 and the second vertical member 12 on the opposing surfaces of two adjacent columns 3 and 4 and uses a screw or lag screw 14 or the like to post the column 3. , 4 are fixed. The process of fixing the vertical members 11 and 12 to the opposing surfaces of the columns 3 and 4 includes two steps so that the horizontal member 13 is divided into two parts or the length of the horizontal member 13 in the axial direction can be changed. It carries out in the state which connected member 13a, 13b. And after fixing the vertical members 11 and 12 to the pillars 3 and 4, a horizontal member is connected. Thereby, even if the space | interval between pillars fluctuates a little, the 1st vertical member 11 and the 2nd vertical member 12 are attached so that two pillars 3 and 4 may be closely_contact | connected, and it connects via the horizontal member 13 Can do.

  When the reinforcing bracket 6 is attached in this way, a bending moment is transmitted between the horizontal member 13 of the reinforcing bracket 6 and the two columns 3 and 4, and the horizontal of the two columns 3 and 4 and the reinforcing bracket 6 is obtained. A ramen structure is formed by the member 13. Moreover, it becomes a multi-layered ramen by attaching several reinforcement metal fittings 6 up and down. When a horizontal force acts parallel to the wall between the two columns, the bending moment acts on the horizontal member 13 and the columns 3 and 4 to collapse the columns 3 and 4 as shown in the bending moment diagram shown in FIG. It will resist.

  The bending moment of the horizontal member 13 is maximized at both ends, that is, in the vicinity of the connecting portion between the first vertical member 11 and the second vertical member 12, and the rigidity reducing portion 13d provided in this portion has an intermediate portion. Large bending deformation occurs. When the inclination of the columns 3 and 4 is increased, plastic deformation occurs in the rigidity reducing portion 13d. When horizontal force repeatedly acts like earthquake motion, the diagram showing the relationship between the bending moment and the bending deformation in the rigidity reducing portion 13d becomes a loop shape, and the energy of the earthquake motion is absorbed by this hysteresis. Accordingly, the reinforcing metal fitting 6 functions as a vibration control device, and the space between the columns to which the reinforcing metal fitting 6 is attached functions as a bearing wall having excellent vibration energy absorption.

  Further, the reinforcing metal fitting 6 can be formed with a small dimension in the thickness direction of the wall, and the wall formed between the two pillars 3 and 4 is the center of the wall from the pillar surface. Even if it is a so-called true wall that has receded to the side, the reinforcing metal fitting 6 can be attached so as to fit within the wall.

Note that the acting bending moment is small at the central portion of the horizontal member 13, and no large bending moment acts on the connecting portion of the horizontal member 13. Therefore, a large deformation does not occur at the connecting portion of the horizontal member 13, and it can resist the deformation of the two columns 3 and 4.
In addition, the structure of the connecting portion provided at the approximate center of the horizontal member 13 can be obtained even when the distance between the pillars 3 and 4 is slightly different by changing the length of the attachment plate 15 as shown in FIG. Correspondingly, the reinforcing bracket 6 can be attached. On the other hand, when the distance between the pillars 3 and 4 is substantially constant in each part of the wooden building, as shown in FIG. 5, the plate-like connection parts 13c provided in the two members constituting the horizontal member are overlapped with each other. The bolt 16 penetrating both of them and a nut screwed to the bolt 16 may be connected by tightening. In this case, it is desirable that the bolt hole provided in at least one of the connection portions 13c of the two members 13a and 13b is a long hole.

In addition to the reinforcing metal fittings shown in FIGS. 2 and 5, the reinforcing metal fittings shown in FIGS. 6 and 7 can be used.
In the reinforcing metal fitting 7 shown in FIG. 6, a horizontal member 23 using a steel material having a U-shaped cross section is formed by connecting two members 23a and 23b. The second vertical member 22 is coupled by welding. And the edge part by the side of the center part of the two members 23a and 23b which comprise a horizontal member is a U-shaped end surface with it cut | disconnected. These two members 23a and 23b are connected by a wooden member 24, and the wooden member 24 is fitted in a recess formed by two flanges 23c and a web 23d of the horizontal member 23. Then, the two members 23a, 23b made of steel and the wooden member 24 are integrally connected by screws or lug screws 25 inserted into small holes provided in the web 23d.

  By using such a reinforcing metal fitting 7, the dimension of the wooden member 24 can be adjusted in accordance with the distance between the pillars 3 and 4 at the site even when the distance between the pillars varies greatly. The reinforcing metal fitting 7 can be used.

  On the other hand, in the reinforcing metal fitting 8 shown in FIG. 7, the horizontal member 33 is not divided, and a continuous steel material is used from the connecting portion with the first vertical member 31 to the connecting portion with the second vertical member 32. Yes. When the distance between the pillars 3 and 4 is the same in each part of the wooden building, and the pillars 3 and 4 can be accurately set up, or the two pillars 3 and 4 are joined with the reinforcing bracket 8 in advance. Such a reinforcing metal fitting 8 can be used when it is possible to stand up on the base from above.

In the embodiment described above, the rigidity of the horizontal members 13, 23, 33 is reduced in the vicinity of the end where the first vertical members 11, 21, 31 and the second vertical members 12, 22, 32 are coupled. Although the portions 13d, 23e, and 33a are provided, the horizontal member may have a uniform cross section without providing the rigidity reducing portion having such a reduced cross section. Even in such a horizontal member, since the bending moment is maximized at both end portions, it is possible to cause plastic deformation in the vicinity of the end portion by selecting a cross section.
The cross section of the horizontal member may be one that does not undergo plastic deformation when a horizontal force is applied during an earthquake. In this case, the effect of absorbing the vibration energy by the plastic hinge cannot be expected, but it can resist the horizontal force due to the rigid structure of the column and the horizontal member.

FIG. 8 is a schematic side view showing a part of the structural housing in a case where the reinforcing metal fitting 6 is attached to the pillars 3 and 4 through the splint 41 and the inter-posts 42 are provided between the two pillars 3 and 4. It is a schematic plan sectional view. FIG. 9 is a side view, a plan view, and a cross-sectional view showing the reinforcing metal fitting 6 in an attached state.
In this embodiment, a splint 41 having a smaller dimension in the wall thickness direction than the columns is attached to the surfaces of the two columns 3 and 4 facing each other from the upper end to the lower end of the columns 3 and 4. The reinforcing metal fitting 6 is fixed to the pillars 3 and 4 through the splint 41. Further, in the middle between the pillars, a pillar 42 having the same dimension in the wall thickness direction as the splint 41 is supported on the base 2 and the upper end is joined to the horizontal member 5.

The first vertical member 11 and the second vertical member 12 of the reinforcing metal fitting 6 are made of steel having an L-shaped cross section, as in the embodiment shown in FIG. 2, and the horizontal member 13 has a U-shaped cross section. The resulting steel is used. Further, the horizontal member 13 is obtained by connecting two members at the center, and the two members 13 a and 13 b are connected by an attachment plate 43. In this embodiment, since the spacer 42 is erected substantially at the center of the horizontal member, the two members 13a and 13b constituting the horizontal member are cut at the positions on both sides of the spacer 42, and the attachment for connecting them. The plate 43 is bent so as to avoid interference with the upright studs 42. In other words, the planar shape of the contact plate 43 is bent so as to have a rectangular groove-shaped portion, and the inter-columns 42 are arranged so as to pass through the groove-shaped recess in the vertical direction. In addition, a notch is provided in a portion where the attachment plate 43 of the stud is crossed, and the attachment plate 43 is accommodated in the notch. A face material 44 for interior decoration can be attached over the surface.
By adopting such a structure, it is possible to easily form a so-called true wall using the face material 44 and to reinforce the reinforcing metal fitting 6 of the present invention within the true wall.

Next, a method for performing such reinforcement on a newly built wooden building and an existing wooden building will be described.
In the newly built wooden building, the pillars 3 and 4 are erected on the base 2 and the horizontal bracket 5 is laid over, and then the reinforcing metal fitting 6 is attached between the pillars. And a wall is formed so that these reinforcement metal fittings 6 may fit in a wall. At this time, as shown in FIG. 10, a plurality of reinforcing metal fittings 6 can be attached to the wall where the long press 51 and the attached head 52 are provided, avoiding the height at which these are provided. Further, it is possible to avoid the position where the ceiling edge 53 is provided and to attach it below this.
On the other hand, as shown in FIG. 11, the reinforcing metal fitting 6 is attached to the portion where the opening 54 is provided at a position where the hanging wall 55 is provided above the opening or the waist wall 56 below the opening. The wall 56 can be formed such that these reinforcing fittings 6 fit within the wall.

When reinforcing an existing wooden building, the wall of the part to which the reinforcing metal fitting 6 is to be attached is disassembled, and after the reinforcing metal fitting 6 is attached between the columns 3 and 4, these reinforcing metal fittings 6 are housed in the wall. To repair the wall. At this time, as shown in FIG. 10, the upper and lower walls are disassembled to disassemble the reinforcing metal fitting 6 without disassembling the long press 51 and the attached head 52 even in the portion where the long press 51 and the attached head 52 are provided. Can be attached. Further, the reinforcing metal fitting 6 can be attached by dismantling the wall below the ceiling edge 53 or the wall above the floor 58 without dismantling the ceiling 57 and the floor 58.
On the other hand, as shown in FIG. 11, in the portion where the opening 54 is provided, the hanging wall 55 provided above the opening 54 and the waist wall 56 below the opening 54 are disassembled and the frame of the opening 54 is suspended without disassembling. The reinforcing metal fitting 6 can be attached in the wall 55 or the waist wall 56.
Therefore, it becomes possible to obtain a large reinforcing effect by reducing the repair cost by limiting the parts to be disassembled in the reinforcement to a small range.

The reinforcement of the wooden building by the reinforcing metal fitting as described above can be applied at a portion where the interval between the two pillars is different, as will be described below.
In general, a wooden structure of a frame structure is constructed such that columns are erected at a center interval of 1 times, 1.5 times, and 2 times in units of 910 mm to 980 mm (1/2 in the middle). Many. Thus, when the space | interval of two pillars changes a lot, a reinforcement metal fitting can be attached as the following structures.

As shown in FIG. 8, when a wall body is formed using splints and studs, and the spacing between the pillars is 1.5 or 2 times the middle, as shown in FIG. A structure can be adopted.
In the structure shown in FIG. 12A, the reinforcing pillar 63 is erected at a position substantially between the one pillar 61. The reinforcing pillar 63 has a dimension in the wall thickness direction that is substantially the same as that of the splint 64 and the stud 65, and has a large width in a direction parallel to the wall surface. This reinforcing stud 63 may be formed from a single piece of wood, or may be used in such a manner that two or three pieces of studs are used in close contact in parallel as shown in FIG. Further, between the reinforcing pillars 63 and 61, a pillar 65 is erected.
Reinforcing metal fittings 66 are attached between the reinforcing interposing columns 63 and the columns 61 that are erected at an almost intermediate interval, similarly to the structure shown in FIG. At this time, a splint 64 is inserted between the pillar 61 and the pillar 61 to be fixed. As a result, a reinforcing frame 63, a column 61, and a horizontal member 66a of the reinforcing metal fitting 66 form a ramen structure.

The space between the reinforcing pillar 63 and the other pillar 62 is about ½ of the distance between them. One of the divided horizontal members of the reinforcing metal fitting 66 shown in FIG. The vertical member 67b is attached to the column 62 through the splint 64 using the divided reinforcing metal fitting 67 coupled with the. The end of the horizontal member 67 a is connected to the reinforcing stud 63. This end portion is not connected to the reinforcing stud 63 so that a bending moment can be transmitted, but is connected so that the position in the vertical direction is fixed using a metal fitting 68 or the like processed into an L shape. Things can be used.
In this way, a face material is provided so as to abut on the reinforcing stud 63, the stud 65, and the splint 64 to which the reinforcing fitting 66 and the divided reinforcing fitting 67 are attached, thereby constituting a wall.

  Such a wall is resisted by a ramen composed of reinforcing pillars 63, pillars 61 erected at intervals in the middle, and horizontal members 66a of the reinforcing metal fittings 66 when a horizontal force is applied. To do. In addition, the reinforcing pillar 63, the other pillar 62, that is, the pillar 62 provided in the vicinity thereof, and the horizontal member 67a of the split reinforcing metal fitting 67 attached between them are the horizontal member 67a and the reinforcing stud 63. Bending moment is not transmitted between the two, but it functions as a hinged ramen and resists horizontal force.

FIG. 12B is a schematic side view showing a mounting state of the reinforcing metal fitting 76 when the center distance between the pillars 71 and 72 is twice as long as that between them. In this structure, a reinforcing pillar 73 is erected approximately at the center between the two pillars. The reinforcing stud 73 is the same as that used in the structure shown in FIG. 12A, and the wall thickness direction dimension is substantially the same as the splint 74 and the stud 75, and in a direction parallel to the wall surface. The width has increased. Between the reinforcing pillar 73 and the pillars 71 and 72 on both sides, a stud 75 is erected, and a brace 74 is interposed between the pillars 71 and 72 and the reinforcing bracket 76 is attached to the reinforcing stud 73. And to the pillars 71 and 72. As a result, a reinforcing frame 73, the columns 71 and 72, and the horizontal member 76a of the reinforcing metal fitting 76 form a ramen structure. And the face material which comprises a wall surface is attached.
Note that the reinforcing method of attaching the reinforcing metal fittings 66 and 76 using the reinforcing spacers 63 and 73 and the splints 64 and 74 in this way is similar to FIG. 11 even when the openings are provided between the columns. It can employ | adopt as what attaches the reinforcement metal fitting 76 to the upper side and lower side.

As a countermeasure when the interval between the two pillars is greatly different, a reinforcing metal fitting can be attached as shown in FIG.
The wall shown in FIG. 13 is a schematic view showing the mounting state of the reinforcing metal fitting when the center interval between the two columns 81 and 82 is intermediate, 1.5 times the middle, and twice the middle. It is.
The splints 83 are attached to the surfaces of the two adjacent pillars 81 and 82 facing each other. The splint 83 has a dimension in the wall thickness direction smaller than the dimension of the pillar. Further, between these splints 83, a plurality of horizontal rails 84 having the same wall thickness direction dimensions as the splints 83 are stretched horizontally at a predetermined interval.

The reinforcing metal fitting 85 is fixed to the two columns 81 and 82 via the splint 83 between the horizontal bars 84. The horizontal member 85 of the reinforcing metal fitting 85 is obtained by connecting two members at the center, and the length of the horizontal member 85 is determined corresponding to the interval between the two columns 81 and 82. Then, the two members constituting the horizontal member 85 are joined by the attachment plate 86.
The face material of the wall is attached in contact with the splint 83 and the horizontal beam 84, and the horizontal material 84 is provided at an appropriate interval, so that the surface material can be firmly supported. Further, the reinforcing metal fitting 85 can be accommodated in the wall to make a true wall.
Note that the reinforcing metal fitting may be one in which a horizontal member made of steel is connected by a wooden member as shown in FIG. 6 instead of the one shown in FIG. By using such a reinforcing bracket, even if the distance between the two columns 81 and 82 is different as shown in FIG. 13, reinforcing brackets other than wooden members having the same shape and dimensions can be used for general purposes. .

1: foundation, 2: base, 3, 4: pillar, 5: horizontal member, 6, 7, 8: reinforcing bracket,
11: 1st vertical member, 12: 2nd vertical member, 13: Horizontal member, 13a, 13b: Two members which comprise a horizontal member, 13c: Flat plate-shaped connection part, 13d: Stiffness reduction part of a horizontal member 13e: horizontal member web, 13f: horizontal member flange, 14: lag screw, 15: attachment plate, 16: bolt,
21: First vertical member, 22: Second vertical member, 23: Horizontal member, 23a, 23b: Two members constituting the horizontal member, 23c: Flange of the horizontal member, 23d: Web of the horizontal member, 23e: Horizontal member rigidity reduction section, 24: wood member, 25: lag screw,
31: 1st vertical member, 32: 2nd vertical member, 33: Horizontal member, 33a: Stiffness reduction part of a horizontal member,
41: splint, 42: stud, 43: accessory plate, 44: face material,
51: Long press, 52: Tsukamoi, 53: Ceiling edge, 54: Opening, 55: Hanging wall, 56: Waist wall, 57: Ceiling, 58: Floor,
61, 62: pillar, 63: reinforcing stud, 64: splint, 65: stud, 66: reinforcing bracket, 67: split reinforcing bracket,
71, 72: pillars, 73: studs for reinforcement, 74: splint, 75: studs, 76: metal fittings for reinforcement,
81, 82: pillar, 83: splint, 84: horizontal rail, 85: reinforcing metal fitting, 86: accessory plate

Claims (11)

Reinforcing brackets for wooden buildings constructed by combining wooden columns and horizontal members,
A first vertical member and a second vertical member fixed to each of the mutually opposing surfaces of two adjacent pillars;
A horizontal member that horizontally joins the first vertical member and the second vertical member;
A reinforcing bracket for a wooden building, characterized in that, when the column is inclined, it resists the inclination of the column by a bending moment generated at a joint portion between the vertical member and the horizontal member.   The horizontal member is adjusted such that a bending rigidity in the vicinity of a joint portion between the first vertical member and the second vertical member is plastically deformed when the column is inclined. Reinforcing metal fittings for wooden buildings according to 1. The horizontal member has a stiffness reducing portion in which bending stiffness is reduced in the vicinity of the coupling portion between the first vertical member and the second vertical member,
The reinforcing metal fitting for a wooden building according to claim 1 or 2, wherein the plastic deformation occurs in the rigidity reducing portion. The horizontal member is a connection of two members,
4. The reinforcing bracket for a wooden building according to claim 1, wherein the connecting portion of the two members can be connected by adjusting the length in the axial direction. .   Each of the two members constituting the horizontal member is firmly connected to one wooden member so as to be able to transmit a bending moment, and is connected via the wooden member. Item 5. A reinforcing bracket for a wooden building according to Item 4. A method of reinforcing a wooden building constructed by combining wooden columns and horizontal members,
A first vertical member arranged in the vertical direction, a second vertical member arranged in parallel with the first vertical member, and both ends bent to the first vertical member and the second vertical member A reinforcing bracket having a horizontal member coupled to transmit moment is disposed between two adjacent pillars;
A wooden structure characterized in that the first vertical member and the second vertical member are fixed to each of the opposing surfaces of two pillars to form a ramen structure with the two pillars and the horizontal member. How to reinforce things.   The horizontal member of the reinforcing metal fitting is adjusted such that a bending rigidity in the vicinity of a joint portion between the first vertical member and the second vertical member is adjusted so that plastic deformation occurs when the column is inclined. The method for reinforcing a wooden building according to claim 6.   The method of reinforcing a wooden building according to claim 6 or 7, wherein a plurality of the reinforcing metal fittings are provided between a lower end and an upper end of two adjacent pillars.   The wooden structure according to claim 6 or 7, wherein the reinforcing bracket is attached in a lower wall of a window provided between two pillars and / or in a hanging wall on an upper side of the window. How to reinforce things.   The method for reinforcing a wooden building according to claim 6 or 7, wherein the reinforcing metal fitting is attached on the upper side of the long press between the two columns and below the peripheral edge of the ceiling. Attach vertical splint to the pillar,
The method of reinforcing a wooden building according to any one of claims 6 to 10, wherein the reinforcing metal fitting is fixed to the pillar via the splint.

Images