JP4220984B2 - Reinforcement structure and reinforcement brackets for existing buildings - Google Patents

Description

  The present invention relates to a reinforcing structure and a reinforcing metal fitting for an existing building.

Conventionally, in order to provide seismic reinforcement to a building, the foundation of the building, the base provided on the foundation, and the columns and braces provided on the base are connected by various metal fittings.
For example, as described in Patent Document 1, a joint structure between a base, a pillar, and a brace is covered with a single metal fitting from the outer side surface and attached with a wood screw to form a reinforcing structure for earthquake resistance. For example, as described in Patent Document 2, a substantially L-shaped metal fitting is attached to the foundation, the base, and the pillar from the outer side surface to provide a reinforcement structure for earthquake resistance.
Such a conventional reinforcement structure for earthquake resistance is applied to a newly built building. Therefore, it is common to attach metal fittings for seismic reinforcement from the outside of the building from the viewpoint of workability.
Moreover, as described in Patent Document 3, a bolt hole for inserting an anchor bolt penetrating from the foundation to the metal fitting attached to the upper surface of the base and the side surface of the pillar orthogonal to the upper surface of the base. Is provided. In other words, this metal fitting cannot be used unless the anchor bolt is placed at a fixed position. Therefore, if the position of the anchor bolt is different, the metal fitting must be remade. There was a problem of getting worse.
Japanese Unexamined Patent Publication No. 2000-204656 (paragraphs 0018 to 0024, FIG. 2) Japanese Patent Laying-Open No. 2003-314064 (paragraphs 0009 to 0017, FIG. 1) JP 2000-54490 A (paragraphs 0012 to 0021, FIG. 2)

However, when applying existing metal fittings to existing buildings, it is particularly necessary to reinforce the corners of existing buildings. There was a problem that the metal fittings had to be attached to foundations, foundations, and pillars in the club.
Moreover, the installation position of the anchor bolt provided in the foundation of the existing building may differ for every existing building, and the metal fitting used for a new building may not be used as it is.
In addition, if a conventional reinforcing bracket is used for the joint between the pillar and the base during sweeping, the joint with the bracing of the conventional reinforcing bracket will hit the lower frame of the sweep, so another reinforcing bracket must be prepared. There was a problem that had to be done.

  Therefore, the present invention aims to solve the above-described problems and provide a reinforcing structure and a reinforcing bracket for an existing building that can be constructed from the inside of the existing building regardless of the position of the anchor bolts already provided. To do.

  In order to solve the above-mentioned problem, the present invention is a reinforcement structure of an existing building that fixes a foundation, a pillar, and a brace provided on the foundation of an existing building together with the foundation, and is formed in a substantially L shape, A first connection fitting attached at right angles to a corner formed by the base and the pillar, and both ends are bent so as to be attached to the base and the pillar diagonally, and one end is the base The other end is attached to the pillar and the middle part is attached to the brace, and the other end is bent at a right angle between the second connection bracket and the pillar. A third connection fitting attached to the upper surface of the base and the remaining flat portion attached to the foundation.

Thus, the reinforcing structure of the existing building of the present invention is to fix the foundation and the pillar with the first connection fitting, fix the bracing, the foundation and the column with the second connection fitting, It was set as the structure which fixes a foundation and a foundation with a connection metal fitting.
Here, the second connection fitting is formed by bending both ends at right angles to the plane of the intermediate portion. Since one end of the second connection fitting is attached to the side surface of the column and the other end is attached to the upper surface of the base, the intermediate part is positioned above the base. Then, the braces are attached to the middle part. Therefore, the end of the bracing is brought into contact with the position where the base and the column are connected, so that there is a gap between the end of the bracing and the end of the second connection fitting attached to the upper surface of the base. It becomes empty.
An anchor bolt already provided is located in the vacant portion, and the end of the third connection fitting can be attached by bypassing the anchor bolt.
Therefore, a reinforcement structure for earthquake resistance can be applied to an existing building regardless of the position of the anchor bolt.
Moreover, the 3rd connection metal fitting is formed in the substantially L shape so that it may be attached to the upper surface of a foundation, and the side surface of a foundation, and can be attached to a foundation and a foundation from the inner side of a building.

  Further, according to the present invention, the first connection fitting and the second connection fitting each include a plurality of attachment holes for attachment, and the attachment holes are positioned in two orthogonal corners. When the first connection fitting and the second connection fitting are attached to the respective portions by means of attachments through the attachment holes, the first connection fitting attached to one of the corners, the first The axial direction of the attachment for attaching the second connection fitting does not intersect the axial direction of the other first attachment fitting attached to the other corner of the fitting, or the other attachment fitting for attaching the second connection fitting. As described above, the position may be provided while being shifted in the vertical direction and / or the horizontal direction with respect to the positions of the other mounting holes.

As described above, the plurality of mounting holes for mounting are marked while being shifted in the vertical direction and / or the horizontal direction with respect to the positions of the other mounting holes. Can dodge other fittings, so even if there are corners in multiple directions, the first and second fittings can be securely attached. .
Here, the attachment means a wood screw, a screw bolt, a chemical anchor, or the like.

  In the present invention, when the second connection fitting is attached, the edge of the intermediate portion located on the lower side may be bent to form a rib.

  As described above, since the rib is formed at the intermediate portion of the second connection fitting, it is possible to prevent the intermediate portion from being deformed when the intermediate portion is attached to the brace.

  In the present invention, when the third connection fitting is attached, the width of the planar portion is formed to be widened from the upper surface of the base to a predetermined height position on the lower side, and the upper surface of the base and The part attached to the side surface may include at least one substantially L-shaped reinforcing member along the surface of the part.

In this way, since the width of the flat portion is widened from the upper surface of the base to a predetermined height position on the lower side, when the mounting tool is attached to the third connecting bracket, the base and the base are widely Can be fixed.
In addition, since at least one substantially L-shaped reinforcing member is attached to the top and side surfaces of the base, that is, the end portion bent at a right angle and the flat portion on the end side, the end portion And the right-angled state formed by the flat surface portion can be maintained.

  The connection fitting according to the present invention is a reinforcing fitting for fixing a base provided on a foundation of an existing building and a pillar erected on the foundation together with the foundation, on a side surface of the pillar. A first column fixing portion to be fixed; a first base fixing portion that is continuous with one end of the first column fixing portion and is fixed to an upper surface of the base; and a side edge of the first column fixing portion. A column-base connection fitting having a reinforcing part that connects the first base fixing part, a second base fixing part fixed to the upper surface of the base, and one end of the second base fixing part A foundation-base connection fitting having a foundation fixing portion that is continuously fixed to the side surface of the foundation, and the reinforcing portion includes an insertion hole for inserting the second foundation fixing portion. The second base fixing part is inserted into the insertion hole and engaged with the first base fixing part. And butterflies.

  According to such a configuration, the pillar and the base are connected by the column-base connection fitting, and the base and the foundation are connected by the base-foundation connection fitting. The reinforcing portion of the column-base connection fitting includes an insertion hole for allowing the second base fixing portion to pass therethrough, and the second base fixing portion is inserted into the insertion hole so as to pass through the first base fixing portion. Therefore, the pillar, the base, and the foundation are firmly fixed integrally. In other words, the pulling force acting on the pillar is transmitted to the foundation of the building via the pillar-base connection fitting and the base-foundation connection fitting. Therefore, the stability of the column can be improved compared to the case where the pulling force acting on the column is supported by the foundation only or through the foundation.

  Furthermore, according to this configuration, the pillar-base connection fitting and the base-foundation connection fitting can be attached in an overlapping manner, so that it is easy to dodge the base anchor bolt. Therefore, reinforcement can be performed regardless of the position of the anchor bolt of the existing building.

  In addition, it is preferable that the column-base connecting bracket includes a plurality of mounting holes for mounting, and the plurality of mounting holes are obtained when the two column-base connecting brackets are respectively attached to the orthogonal surfaces of one column. Furthermore, it is more preferable that the two fittings engaged with the attachment holes are divided into two groups by, for example, different color borders.

  In addition, the pillar-base fitting has two reinforcing parts, and the reinforcing parts extend from both side edges of the first pillar fixing part and are connected to the first base fixing part. The side edge portion of the reinforcing portion on the first base fixing portion side is bent toward the first base fixing portion and overlapped with the first base fixing portion. preferable.

  According to such a configuration, each of the reinforcing portions extends from both side edges of the first column fixing portion and is bent along the first base fixing portion, so that the first portion of the reinforcing portion is bent. Since the side edge portion on the base fixing portion side is bent toward the first base fixing portion and overlapped with the first base fixing portion, the base-base connection is inserted into the insertion hole of the reinforcing portion. When the second base fixing portion of the metal fitting is engaged, the side edge portion on the first base fixing portion side of the reinforcing portion overlapped with the first base fixing portion and the second base fixing portion are formed. As a result, the pulling force acting on the column can be more reliably transmitted to the foundation.

  Moreover, according to this structure, a column-base connection metal fitting can be manufactured by bending one metal plate. Therefore, the labor of welding becomes unnecessary, manufacture of a reinforcing metal fitting becomes easy, and the possibility of poor welding can be eliminated.

  Moreover, it is preferable that the foundation-foundation fitting is provided with at least one substantially L-shaped reinforcing member along a surface of a corner portion where the second foundation fixing portion and the foundation fixing portion are continuous. .

  According to this configuration, the bending angle between the second base fixing part and the foundation fixing part is kept constant by the substantially L-shaped reinforcing member. Therefore, it is possible to more firmly connect the foundation and the foundation, and further the pillar and the foundation.

  The reinforcing bracket further includes a column-bar connection fitting for attaching a brace to a corner where the column and the base are joined, and the column-bar connection bracket includes a side surface of the column. A second column fixing portion that is fixed to the side, and a bracing fixing portion that extends from one side edge of the second column fixing portion in a direction perpendicular to the side surface of the column and is fixed to the side surface of the bracing. And a bottom plate portion that connects the lower end edge of the second column fixing portion and the lower end edge of the bracing fixing portion and is placed on the upper portion of the second base fixing portion.

According to such a configuration, the bracing can be suitably installed at the corner where the pillar and the base are joined. In particular, it is suitable for the case where the bracing is attached later to an existing wall that has no bracing.
At this time, when a gap is formed between the bottom plate portion of the column-muscle fitting mounted on the upper portion of the second base fixing portion and the upper surface of the base, a spacer is interposed in the gap. preferable. Thereby, it is possible to transmit the compressive force applied to the bracing to the base in the entire bottom plate portion of the column-bracket fitting.

  Further, when there is a level difference (non-land) in the height between the second base fixing part and the spacer, the height is added between these and the bottom plate part of the column-joint fitting. More preferably, a compression deformation member that is compressed and deformed by the compression force is interposed. As a result, the compressive force applied to the bracing can be reliably transmitted to the base throughout the bottom plate portion of the column-bracket fitting. As the compression deformable member, for example, hard rubber or plywood can be used.

  Further, the column-base connection fitting has a corner portion between the first column fixing portion and the first base fixing portion, and the corner portion includes the first column fixing portion and the first column fixing portion. It is preferable that it is configured so as to be inclined at an angle of about 45 ° with respect to one base fixing portion and to have a mounting hole for allowing the mounting tool to pass therethrough.

  According to such a configuration, the column-base connection fitting has the corner portion between the first column fixing portion and the first base fixing portion, and the corner portion includes the first column fixing portion and the first column fixing portion. It is inclined at an angle of approximately 45 ° with respect to the base fixing portion of the base plate and has a mounting hole through which the mounting tool is inserted, so that the mounting tool is tilted toward the corner where the pillar and the base come into contact. It becomes possible to drive in. Therefore, even when a pulling force is applied to the pillar, the corner portion of the pillar-base connecting metal fitting does not float, and the pulling force can be transmitted to the base firmly.

  According to such a reinforcement structure and reinforcement bracket of an existing building, it can be constructed from the inside of the existing building regardless of the position of the anchor bolts already provided, and the existing building can be made a reinforcement structure for earthquake resistance. .

<First Embodiment>
Next, a best mode for carrying out the present invention (hereinafter referred to as “first embodiment”) will be described in detail with reference to the drawings.
FIG. 1 is a partial perspective view showing an example of a reinforcing structure of an existing building according to the first embodiment of the present invention. FIG. 2 is a partial plan view showing an example in which the reinforcing structure of the existing building according to the first embodiment of the present invention is applied to the corner. FIG. 3 is a partial side view showing an example in which the reinforcing structure for an existing building according to the first embodiment of the present invention is applied to the corner. FIG. 4A is a perspective view showing an example of the first connection fitting, and FIG. 4B is a perspective view showing an example of the third connection fitting. FIG. 5 is a perspective view showing an example of the second connection fitting. FIG. 6A is a partial perspective view showing an example of a state in which the attachment tool is attached to the first connection fitting, and FIG. 6B is a schematic view showing an example of the attachment state of the attachment tool.

As shown in FIGS. 1 to 3, the reinforcing structure 10 of the existing building according to the present invention is attached to the foundation B, base D, column H, and bracing S of the existing building KT by replacing the anchor bolts M, respectively. The connection fitting 20, the second connection fitting 30, and the third connection fitting 40.
The first connection fitting 20, the second connection fitting 30, and the third connection fitting 40 are attached to the foundation B, the base D, the column H, and the bracing S by the attachment tool G.
Moreover, the 1st connection metal fitting 20, the 2nd connection metal fitting 30, and the 3rd connection metal fitting 40 are attached to the corner E of a building.

As shown in FIGS. 1 to 3 and FIG. 4A, the first connection fitting 20 is attached to the base D and the pillar H, and plays a role of fixing the base D and the pillar H.
The first connection fitting 20 is formed by forming a plate member having a predetermined length having a width smaller than the width of the base D and the width of the column H into a substantially L shape. In addition, you may provide the rib 21 in the edge from the part which becomes a right angle of this substantially L shape to both ends.
The rib 21 has a substantially triangular shape and plays a role of maintaining an L-shaped right-angle state.

  The first connection fitting 20 is provided with a plurality of attachment holes 22A for attachment to the base D and the pillar H.

As shown in FIGS. 6 (a) and 6 (b), when the two first connection fittings 20, 20 are attached to the respective two corners E, E positioned in the orthogonal direction, in particular, the pillar H The axial direction of the attachment G for attaching the first connection fitting 20 attached to one of the corners E is the same as that of the attachment G for attaching the other first connection fitting 20 attached to the other corner E. In order not to intersect the axial direction, the mounting hole 22A is provided so as to be shifted in the vertical direction and / or the horizontal direction with respect to the position of the other adjacent mounting hole 22A, and further a mark N (see FIG. 4A). ) Is given.
This mark N is provided by, for example, arranging a color around the hole or applying marks such as symbols and figures.

  In this way, by attaching the mark N to the shifted mounting holes 22A..., The mounting holes 22A used for each of the corners E are distinguished, so that the mounting holes can be securely mounted to other corners. Tool G can be dodged.

As shown in FIGS. 1 to 3 and 5, the second connection fitting 30 is attached to the base D, the pillar H, and the bracing S, and mainly serves to fix the bracing S.
The second connection fitting 30 is bent so that a plate-shaped intermediate portion 32 and both ends of the intermediate portion 32 are perpendicular to the plane of the intermediate portion 32 because the both ends of the intermediate portion 32 are attached to the base D and the pillar H. The end portions 31 and 31 are formed and ribs 33A and 33B that reinforce the intermediate portion 32.

  The width of the intermediate portion 32 is formed wider than the widths of both end portions 31, 31, and a band portion for forming the rib 33 </ b> A is formed on the upper bottom portion of the intermediate portion 32 having a substantially trapezoidal shape. ing. That is, the edge of the intermediate portion 32 is bent to form the rib 33A.

Further, bands for forming the ribs 33B and 33B are also formed between the upper bottom portion (edge) and the hypotenuse portion from the upper bottom portion to the end portions 31 and 31. Thus, the ribs 33B and 33B are formed by bending the belt portion at the oblique side in the same direction as the end portions 31 and 31.
In addition, it is suitable that the intermediate part 32 is widened to the entrance corner E side to the extent that it does not come into contact with a third connection fitting 40 described later.
In this way, the third connection fitting 40 can be installed near the pillar H of the base D, and the portion close to the end of the bracing can be fixed by the widened intermediate portion 32.
The widened portion (intermediate portion 32) is reinforced by the ribs 33A and 33B.

  When the second connection fitting 30 formed in this way is attached to the base D and the pillar H, the upper bottom portion that is substantially trapezoidal in the intermediate portion 32 is positioned on the lower side. The rib 33A is located below the intermediate portion 32.

  Therefore, the second connection fitting 30 has one end 31 attached to the column H and the other end attached to the base D with the rib 33A facing downward. In this state, the intermediate portion 32 is attached to the bracing S.

  Here, in order to attach the second connection fitting 30 to the base D and the pillar H, a plurality of attachment holes 34 </ b> A are provided at both bent ends of the second connection fitting 30. In the first embodiment, four mounting holes 34A are provided.

When the attachment hole 34A is attached to each of the two corners E and E in which the two second connection fittings 30 and 30 are orthogonal to each other, like the attachment hole 22A of the first connection fitting 20. In particular, in the column H, the axial direction of the attachment G for attaching the second connection fitting 30 attached to one entry corner E is different from the other second connection fitting 30 attached to the other entry corner E. In order not to cross the axial direction of the attachment G to be attached, the position is shifted in the longitudinal direction and / or the lateral direction with respect to the position of the other adjacent attachment hole 34A, and a mark N is given. The same applies to the mounting holes 44A of the third connection fitting 40 described later.
The intermediate portion 32 is provided with an attachment hole 34B for attaching to the bracing S.

As shown in FIGS. 1 to 3 and FIG. 4B, the third connection fitting 40 is attached to the foundation B and the base D, and plays a role of fixing the base B and the base D.
The third connection fitting 40 is attached to an end portion 41 where one end of the flat portion 42 is bent at a right angle with respect to the plane of the flat portion 42, and an outer surface of the end portion 41 and the flat portion 42. It is comprised from the reinforcement member 43 of a substantially L shape.

  The end portion 41 is provided with an attachment hole 44A for attachment to the upper surface of the base D, and is attached to the surface of the base D by the attachment tool G.

  The flat part 42 is attached to the foundation B and the base D, and is formed so that the width is widened from the upper surface of the base D and becomes equal at a predetermined position. The flat surface portion 42 is provided with mounting holes 44B for mounting on the inner side surface of the base D and mounting holes 44C for mounting on the inner side surface of the foundation B. The surface of the base D is mounted by the mounting tool G. Can be attached to.

  The reinforcing member 43 has a substantially L shape and is formed so that the width and thickness are substantially the same. Note that “substantially the same” means “same” even when there is a “difference of several millimeters”.

The reinforcing member 43 is attached so that the surface of the substantially L-shaped inner corner side extends from the outer surface of the end portion 41 to the outer surface of the portion facing the base D in the flat portion 42. The attachment is preferably welding, but bolting or the like may be used.
Further, at least one reinforcing member 43 is provided in the width direction of the end portion 41. In the first embodiment, two are arranged side by side in the width direction.

Next, the construction sequence of the reinforcement structure 10 of the existing building of this invention is demonstrated.
In addition, the case where the bracing S is not provided in this existing building KT (refer FIG. 1) is demonstrated. First, the foundation B, the foundation D, and the pillar H are exposed from the inside of the existing building KT (see FIG. 1).

  In this state, the first connection fitting 20 is attached to the corner E formed by the base D and the pillar H. At this time, the first connection fitting 20 is attached to the upper surface of the base D and the side surface of the column H between the anchor bolt M and the column H that fix the foundation B and the base D.

  Then, the second connection fitting 30 is attached to the corner E formed by the base D and the pillar H. At this time, the second connection fitting 30 is attached to the upper surface of the base D and the side surface of the column H across the anchor bolt M. Note that a predetermined length of space is provided between the end 31 of the second connection fitting 30 attached to the upper surface of the base D and the anchor bolt M.

Here, the bracing S is attached to the intermediate portion 32 of the second connection fitting 30. The bracing S is attached to the intermediate portion 32 of the second connection fitting 30 with its end abutted against a portion where the base D and the pillar H intersect.
And the 3rd connection metal fitting 40 is attached to the foundation B and the base D from the inner side of the existing building KT at intervals of a predetermined length.

Since the reinforcement structure of the existing building is configured in this way, the outer wall of the existing building is not removed, so that the existing building can be reinforced from the inside without damaging the waterproof structure of the existing building.
Moreover, when reinforcing from the indoor of an existing building, it will reinforce a corner, but even in such a case, a corner can be easily reinforced.
Moreover, even if the position of the anchor bolt is different for each existing building, the existing building can be easily reinforced.

  Although the first embodiment of the present invention has been described above, the present invention is not limited to the first embodiment. For example, the third connection fitting 40 is a base on the side opposite to the pillar H of the end 31 in addition to between the end 31 and the pillar H of the second connection fitting 30 attached to the upper surface of the foundation D. You may attach to D.

Second Embodiment
Next, a second embodiment of the present invention will be described with reference to the drawings. In addition, the same number is attached | subjected to the element same as 1st Embodiment, and the overlapping description is abbreviate | omitted. FIG. 7 is a perspective view showing a reinforcing metal fitting according to the second embodiment of the present invention. FIG. 8 is a plan view showing a reinforcing metal fitting according to the second embodiment of the present invention.

  The reinforcing metal fitting 50 according to the second embodiment is a metal fitting for reinforcing the corner E formed by the base D and the pillar H, and connects the pillar H and the base D as shown in FIG. A column-base connection fitting 60, a foundation-foundation connection fitting 70 that connects the foundation D and the foundation B, and a column-bar connection fitting 80 that connects the column H and the bracing S are configured.

  As illustrated in FIGS. 7 and 8, the column-base connection fitting 60 is formed in a substantially L shape, and is attached across the side surface Ha of the column H and the upper surface Da of the base D. In the second embodiment, the column-base connection fitting 60 is attached to one side in the width direction of the column H (and the base D) so that the bracing S can be attached to the corner E.

FIG. 9 is a view showing a column-base connection fitting of a reinforcing fitting according to the second embodiment, where (a) is a perspective view and (b) is a development view.
As shown in FIG. 9A, the column-base connection fitting 60 mainly includes a first column fixing portion 61 fixed to the side surface Ha of the column H, and a first column fixed to the upper surface Da of the base D. The base fixing part 62 and two reinforcing parts 63 that connect both side ends of the first pillar fixing part 61 and both side ends of the first base fixing part 62 are configured. As shown in FIG. 9B, the column-base connection fitting 60 is formed by bending a single plate-like member.

  As shown in FIGS. 9A and 9B, the first column fixing portion 61 is a plate-like body having a rectangular shape, and has a plurality of mounting holes P and P for inserting fixing screws and the like. …have. A corner portion 64 is continuous with the lower end portion of the first column fixing portion 61 at an angle of 45 °. Reinforcing portions 63 and 63 extend from both side ends of the first column fixing portion 61.

  As shown in FIGS. 9A and 9B, the first base fixing portion 62 is a plate-like body having a rectangular shape, and has a plurality of mounting holes P, P... For inserting screws. ing. The first base fixing portion 62 is continuous with the lower end portion of the first column fixing portion 61 via the corner portion 64. Further, the first base fixing portion 62 is inclined at an angle of 45 ° with respect to the corner portion 64, that is, has an angle of 90 ° with respect to the first column fixing portion 61.

The reinforcement part 63 is comprised from the rib part 63a, the connection part 63b, and the penetration hole 63c, as shown to Fig.9 (a), (b).
The rib portion 63a has a horizontal F shape, extends from both side ends near the lower end portion of the first column fixing portion 61, and is bent at a right angle in a direction along the side end of the first base fixing portion 62. It has been. The rib portion 63 a is formed in such a length that the end portion of the rib portion 63 a is located at the same position as the end portion of the first base fixing portion 62 in a state of being bent along the first base fixing portion 62.

  The connecting portion 63b is a portion formed continuously from the lower end side (the lower side of FIG. 9B) of the rib portion 63a, and is perpendicular to the first base fixing portion 62 with respect to the rib portion 63a. Is bent. That is, the connecting part 63b is a part formed by bending the side edge part of the reinforcing part 63 on the first base fixing part 62 side. As a result, the connecting portion 63 b overlaps the first base fixing portion 62. The connecting portion 63b also has mounting holes P, P ... at positions corresponding to the mounting holes P, P ... of the first base fixing portion 62. Then, by inserting a fitting such as a screw into the base D through the connecting portion 63b and the first base fixing portion 62, the rib portion 63a (and hence the first column fixing portion 61) is inserted through the connecting portion 63b. ) Is connected to the first base fixing part 62. Thereby, the 1st pillar adhering part 61 and the 1st base adhering part 62 are kept at a right angle state.

  The insertion hole 63c is a space through which a foundation-foundation fitting 70 described later is inserted, and is formed to be surrounded by the rib portion 63a and the connecting portion 63b. The lower end of the insertion hole 63c is flush with the surface of the connecting portion 63b.

  Here, it is preferable that the attachment holes P, P... Of the connecting portion 63b are formed at positions that do not overlap the second base fixing portion 72 of the base-foundation connection fitting 70 inserted through the insertion hole 63c. In this way, even when the head of the fixture G protrudes from the attachment hole P, it does not interfere with the second base fixing portion 72.

  As shown in FIG. 9A, the corner portion 64 is a portion located between the first column fixing portion 61 and the first base fixing portion 62, and is at an angle of approximately 45 ° with respect to both. Inclined. Moreover, since the corner part 64 is provided with the attachment hole P for making the attachment tool G penetrate, it can insert the attachment tool G diagonally with respect to this entrance corner part.

  That is, since the corner portion 64 is slightly lifted from the corner portion formed by the pillar H and the base D, the corner portion 64 is cornered by strongly screwing, for example, a screw into the mounting hole P. It can be strongly attracted toward the part. Therefore, even if a large tensile force (pull-out force) is applied to the column H, the corner portion 64 does not lift from the entering corner portion, and the tensile force can be reliably transmitted to the base.

  Since the column-base connection fitting 60 is formed so that the height of the reinforcing portion 63 is low (for example, about ¼ to ５ of the height of the column-base connection fitting 60), so-called sweeping is configured. Even when attaching to the corner E of the column H and the base D, the reinforcing part 63 does not interfere with the lower frame of the sweep.

FIG. 10 is a perspective view showing a base-foundation fitting of the reinforcing fitting according to the second embodiment.
The foundation-foundation connection fitting 70 is a member that connects the foundation D and the foundation B, and as shown in FIG. 10, has a reverse L-shape as a whole. The base-foundation fitting 70 includes a base fixing portion 71 connected to the side surface Ba of the base B, and a second base fixing that extends horizontally from the upper end of the base fixing portion 71 and is connected to the upper surface Da of the base D. It is comprised from the reinforcement member 73 attached along the corner part to which the part 72 and the foundation fixed part 71 and the 2nd base fixed part 72 continue.

  As shown in FIG. 10, the foundation fixing portion 71 has a flat plate shape and tapers toward the upper side. The foundation adhering portion 71 has mounting holes P, P,. The foundation adhering portion 71 is connected to the side surface Ba of the foundation B by a fixture G (for example, an anchor and a nut).

  As shown in FIG. 10, the second base fixing portion 72 has a flat plate shape, and includes mounting holes P and P near the tip thereof. Then, as shown in FIGS. 7 and 8, the second base fixing portion 72 is attached to the upper surface Da of the base D with bolts, screws and the like in a state where the second base fixing portion 72 is inserted into the insertion hole 63 c of the column-base connection fitting 60. They are connected by the tool G. As a result, the second base fixing part 72 and the first base fixing part 62 are engaged.

The reinforcing member 73 is a member having an L shape, and in this embodiment, the reinforcing member 73 is welded and fixed in an inverted L shape along a corner portion where the base fixing portion 71 and the second base fixing portion 72 are continuous. . Thereby, the cross-sectional rigidity of a corner part becomes large and the base D will be firmly fixed to the foundation B. Moreover, by this, the 1st base adhering part 62 of the column-base connection metal fitting 60 will be firmly fixed to the foundation B, and the pillar H will be firmly fixed to the foundation B by extension.
In the second embodiment, the cross-sectional rigidity of the corner portion is increased by using the reinforcing member 73. However, the present invention is not limited to this. For example, even if the member thickness of the base-foundation connection fitting 70 itself is increased. Good.

FIG. 11 is a perspective view showing a column-bar connection fitting of a reinforcing fitting according to the second embodiment. FIG. 12 is a perspective view showing a spacer of the reinforcing metal fitting according to the second embodiment.
As shown in FIG. 11 (refer to FIG. 7 as appropriate), the column-bar connection fitting 80 is fixed to the second column fixing portion 81 fixed to the side surface Ha of the column H and the side surface Sa of the bar S. The brace fixing part 82 and a bottom plate part 83 placed on the top of the base-foundation fitting 70 fixed to the base D are configured.

As shown in FIG. 11, the second column fixing portion 81 is a rectangular plate-like body, and has a plurality of mounting holes P, P... For inserting screws and the like. At one side end of the second column fixing portion 81, a bracing fixing portion 82 is continuously formed in a direction perpendicular to the second column fixing portion 81.
Similar to the second column fixing portion 81, the bracing fixing portion 82 is a plate-like body having a substantially rectangular shape, and has a plurality of mounting holes P, P,.
The bottom plate portion 83 is a plate-like body having a rectangular shape, and is continuous with the lower ends of the second column fixing portion 81 and the bracing fixing portion 82. Thereby, the 2nd pillar fixing | fixed part 81 and the bracing fixing | fixed part 82 are maintained at a right angle state.

As shown in FIGS. 7 and 8, the column-bar connection fitting 80 is installed on the other side in the width direction of the corner E. At this time, a spacer 90 described later is installed between the second base fixing portion 72 of the base-foundation connection fitting 70 and the column H, and the upper surface Da of the base D and the column-bar connection fitting 80 A gap with the bottom plate portion 83 is filled.
As described above, the column-bar connection fitting 80 can be attached after the column-base connection fitting 60 and the base-foundation connection fitting 70 are installed in the entrance corner E. Therefore, it becomes possible to attach and reinforce the braces S later.

  As shown in FIG. 12, the spacer 90 is a member having a rectangular parallelepiped shape and includes mounting holes P and P. The spacer 90 is installed between the bottom plate portion 83 of the column-bar connection fitting 80 and the upper surface Da of the base D, and plays a role of transmitting the compressive force acting on the bar S to the base D.

  Here, it is more preferable that, for example, a plywood (not shown) is sandwiched between the second base fixing portion 72 and the spacer 90 and the bottom plate portion 83. In this case, even when there are small gaps or steps between the second base fixing part 72 and the spacer 90 and the bottom plate part 83, the plywood is crushed by the compressive force acting on the bracing S and the gaps or steps are filled. The compression force can be transmitted across the entire bottom surface of the bottom plate portion 83.

  Note that the column-bar connection fitting 80 is a known connection fitting and is used for fixing the column H and the bracing S together. The column-base connection fitting 60 and the base-foundation connection fitting 70 according to the present invention can be used in combination with such a known column-base connection fitting 80 as well.

  Although the second embodiment of the present invention has been described above, the present invention is not limited to the second embodiment.

  For example, as shown in FIG. 13, the column-base connection fitting 60 is placed close to the other in the width direction of the column H (and the base D), and the second base fixing portion 72 of the base-base connection fitting 70 is provided. The column H (and the base D) is engaged with the insertion hole 63c of the column-base connection fitting 60 from one side in the width direction, and is further moved to one side in the width direction of the column H (and the base D) to connect the column to the brace. The metal fitting 80 may be installed. At this time, the first base fixing portion 62 and the connecting portion 63b of the column-base connection fitting 60 are attached to positions corresponding to the mounting holes P, P of the second base fixing portion 72 of the base-base connection fitting 70. It is preferable to provide holes P and P. In this way, the braces S can be arbitrarily installed according to one or the other in the width direction of the column H. Therefore, the reinforcing metal fitting 50 can be suitably attached according to the situation of the existing building KT.

  As shown in FIGS. 7 and 8, when another pillar-base connection fitting 60 is installed on the side face Hb orthogonal to the side face Ha of the pillar H, as described in the first embodiment, as shown in FIG. In order to prevent the Gs from colliding with each other, for example, it is preferable to divide the mounting holes P, P... Of the column-base connection fitting 60 into two groups and attach an identification mark to each (or one). When one of the pillar-base connection fittings 60 is attached to the side surface Ha of the pillar H using the attachment holes P, P... With one identification mark, the other attachment hole P with the other identification mark is attached. , P... To attach the other column-base connection fitting 60 to the side surface Hb. Thereby, the attachment tools G do not interfere with each other, and the attachment work can be performed smoothly.

  Moreover, in 2nd Embodiment, although the column-base connection metal fitting 60 was comprised without bending and welding etc. of one plate-shaped member, it is not restricted to this, For example, connection of the reinforcement part 63 The part 63b may be omitted, and the first base fixing part 62 and the lower end part of the rib part 63a of the reinforcing part 63 may be connected by welding.

  As a reference use example, the column-base connection fitting 60 and the base-foundation connection fitting 70 according to the second embodiment can be used alone.

It is a fragmentary perspective view which shows an example of the reinforcement structure of the existing building which concerns on 1st Embodiment of this invention. It is a fragmentary top view which shows an example which applied the reinforcement structure of the existing building which concerns on 1st Embodiment of this invention to a corner. It is a partial side view which shows an example which applied the reinforcement structure of the existing building which concerns on 1st Embodiment of this invention to a corner. (A) is a perspective view which shows an example of a 1st connection metal fitting, (b) is a perspective view which shows an example of a 3rd connection metal fitting. It is a perspective view which shows an example of a 2nd connection metal fitting. (A) is a fragmentary perspective view which shows an example of the state which attached the fixture to the 1st connection metal fitting, (b) is a schematic diagram which shows an example of the attachment state of a fixture. It is the perspective view which showed the reinforcement metal fitting which concerns on 2nd Embodiment of this invention. It is the top view which showed the reinforcement metal fitting which concerns on 2nd Embodiment of this invention. It is the figure which showed the column-base connection metal fitting of the reinforcement metal fitting which concerns on 2nd Embodiment, (a) is a perspective view, (b) is an expanded view. It is the perspective view which showed the base-foundation connection metal fitting of the reinforcement metal fitting which concerns on 2nd Embodiment. It is the perspective view which showed the pillar-rack joint metal fitting of the reinforcement metal fitting which concerns on 2nd Embodiment. It is the perspective view which showed the spacer of the reinforcement metal fitting which concerns on 2nd Embodiment. It is the perspective view which showed the modification of the reinforcement structure which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Reinforcing structure of existing building 20 1st connection metal fitting 21 rib 22A attachment hole 30 2nd connection metal fitting 31 end part 32 intermediate part 33A, 33B rib 34A attachment hole 34B attachment hole 40 3rd connection metal fitting 41 end part 42 plane Part 43 Reinforcing member 44A Mounting hole 44B Mounting hole 44C Mounting hole 50 Reinforcement bracket 60 Column-base connection bracket 70 Base-base connection bracket 80 Column-intersection connection bracket KT Existing building B Foundation D Base H Column S Bracing M Anchor bolt G Mounting tool N mark

Claims (9)

A reinforcement structure of an existing building that fixes a foundation, a pillar, and a brace provided on the foundation of an existing building together with the foundation,
A first connection fitting formed in a substantially L shape and attached at right angles to a corner formed by the base and the pillar;
A second connection in which both ends are bent so as to be obliquely attached to the base and the pillar, one end is attached to the base, the other end is attached to the pillar, and an intermediate part is attached to the brace. Metal fittings,
One end is bent at a right angle and attached to the upper surface of the base between the second connection fitting and the column, and the third connection fitting to which the remaining flat portion is attached to the foundation;
A reinforcement structure for an existing building, characterized by comprising: Each of the first connection fitting and the second connection fitting includes a plurality of attachment holes for attachment,
The mounting hole is
When the first connection fitting and the second connection fitting are attached to the two corners positioned in the orthogonal direction by the attachment tool through the attachment holes, respectively.
The first connecting fitting attached to one of the corners, the axial direction of the fitting attaching the second connecting fitting,
In order not to intersect with the axial direction of the other first attachment fitting attached to the other corner of the other, the other attachment fitting to attach the second connection fitting,
The reinforcing structure for an existing building according to claim 1, wherein the reinforcing structure is provided with a mark that is shifted in a vertical direction and / or a horizontal direction with respect to the position of another mounting hole.   3. The existing building according to claim 1, wherein the second connection fitting has a rib formed by bending an edge of an intermediate portion located on a lower side when the second connection fitting is attached. 4. Reinforced structure. When the third connection fitting is attached, the width of the flat portion is formed to be expanded from the upper surface of the base to a predetermined height position on the lower side,
2. The reinforcement structure for an existing building according to claim 1, wherein at least one substantially L-shaped reinforcement member is provided along a surface of the part at a part attached to an upper surface and a side surface of the base. A reinforcing bracket for fixing a base provided on the foundation of an existing building and a pillar erected on the base together with the foundation,
A first column fixing portion that is fixed to a side surface of the column; a first base fixing portion that is continuous with one end of the first column fixing portion and is fixed to an upper surface of the base; and the first column fixing portion. A column-base connection fitting having a reinforcing part for connecting the side edge of the part and the first base fixing part;
A foundation-foundation fitting having a second foundation fixing part fixed to the upper surface of the foundation; and a foundation fixing part which is continuous with one end of the second foundation fixing part and fixed to the side surface of the foundation; Comprising
The reinforcing portion includes an insertion hole for inserting the second base fixing portion,
The second base fixing part is inserted into the insertion hole and engaged with the first base fixing part. The column-base fitting has two of the reinforcing parts,
Each of the reinforcing portions extends from both ends of the first column fixing portion, and is bent along the first base fixing portion, so that the side of the reinforcing portion on the first base fixing portion side is The reinforcing metal fitting according to claim 5, wherein an edge portion is bent toward the first base fixing portion and overlapped with the first base fixing portion.   The base-foundation fitting includes at least one substantially L-shaped reinforcing member along a surface of a corner portion where the second base fixing portion and the base fixing portion are continuous. The reinforcing metal fitting according to claim 5 or 6. Further comprising a column-bar connection fitting for attaching braces to the corners where the columns and the foundation are joined,
The column-bar connection fitting is a second column fixing portion fixed to the side surface of the column, and extends from one side edge of the second column fixing portion in a direction orthogonal to the side surface of the column. The bracing fixing part fixed to the side surface of the bracing, the lower edge of the second column fixing part and the lower edge of the bracing fixing part are connected and placed on the upper part of the second base fixing part. The reinforcing metal fitting according to any one of claims 5 to 7, further comprising a bottom plate portion. The column-base connection fitting has a corner portion between the first column fixing portion and the first base fixing portion,
The corner portion is inclined at an angle of approximately 45 ° with respect to the first column fixing portion and the first base fixing portion, and includes a mounting hole for allowing a fitting to pass therethrough. The reinforcing metal fitting according to any one of claims 5 to 8.

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