JP2014198962A - Bearing force reinforcing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing force reinforcing method having good workability for an existing building of steel construction.SOLUTION: A bearing force reinforcing method reinforces bearing force by the processes to: remove an existing face material from an external wall panel; remove a substrate plywood exposed by removing the existing face material; fix a rigid reinforcing steel plate 7 to four sides of a panel frame 2a exposed by removing the substrate plywood; place a new substrate material on the reinforcing steel plate 7; and install the existing face material or a new face material on the new substrate material.

Description

  The present invention relates to a strength strengthening method for a building having an outer wall composed of a plurality of outer wall panels, and more particularly to a strength strengthening method suitable for strength strengthening of an existing building.

  In general, an outer wall panel subjected to strength reinforcement in a building having a plurality of outer wall panels includes a frame in which braces or reinforcing steel plates are joined by welding or fixed to screws. In addition, the strength reinforcement is performed at the time of manufacturing the outer wall panel in the panel factory, and the reinforcement is usually already performed when the outer wall panel is attached to the building.

  On the other hand, in recent years, interest in private power generation has increased, and an increasing number of households attach solar panels to the roofs of houses. However, when a solar panel is attached, a load that is not assumed at the beginning of construction is applied from the roof to the columns / beams and the outer wall panel. In this case, the load-bearing balance of the house may be lost, and some outer wall panels may need to be strengthened.

In addition, for example, a contractor who is not familiar with the structure of the wall may make a hole in the wall without involvement of a contractor in order to pass a cooling pipe or the like. In such a case, depending on the contractor, the brace and the panel frame may be damaged, and the proof strength of the outer wall panel may be lowered.
From such a background, there has been a case where it is necessary to newly perform a strength reinforcement work on a building such as an existing house.

  For example, Patent Literature 1 discloses a strength reinforcement method for retrofitting braces, which are braces so as to straddle two pillars of a wooden house, as a technique for newly performing a strength reinforcement work on an existing building. In this method, the face material of the existing outer wall is peeled off, a brace is fixed to the exposed wooden pillar with a screw, and a new face material is attached outside the position of the existing face material.

JP-A-8-284465

  The strength reinforcement method disclosed in Patent Document 1 not only changes the appearance of the building due to the braces, but also fixes the braces to the wooden pillars of the wooden house with screws. Braces could not be easily attached to steel columns with screws, and could not be easily applied to strengthening the strength of steel structures.

  Moreover, the strength reinforcement method disclosed in Patent Document 1 requires a space for accommodating the brace as much as the brace is attached. For this reason, a new face material must be provided outside the existing face material as described above. Therefore, even when only a part of the outer wall is proof-strengthened, it is necessary to replace the face material of the entire outer wall in order to make the face material flush, and workability is low and cost is high. Moreover, the replacement of the face material has a problem that the face material itself is heavy, and in particular, when a face material on the outer wall of the second floor or higher is replaced, a scaffold is provided to make a large-scale work.

  In addition, in the case where a steel building is subjected to strength reinforcement, a method of attaching a brace to a steel column by welding is also conceivable. However, when performing welding, if there is a combustible material such as PS (polystyrene) in the surrounding area, the surrounding combustible material may burn or melt due to sparks generated during welding, and is cured with a flameproof sheet. There was a need.

  In this way, if it is cured with a flameproof sheet so as to cover the combustible material, it can be welded even if there are combustible materials in the surroundings, but it takes cost and labor, and in addition, space is difficult to cure with the flameproof sheet was there. In addition, welding by a welding engineer is necessary, and further, it is necessary to prepare a welding machine and a 200 V power source. Since the welding machine is a large machine, it is difficult to carry in or unload depending on the place. For these reasons, the strength reinforcement method of attaching braces to a steel column of a building by welding in the field has not been practical.

  The object of the present invention was made to solve the above-mentioned problems, and without changing the external appearance of the building, without changing the external appearance of the building, which is required for the strength reinforcement provided in the existing steel structure building. An object of the present invention is to provide a yield strength reinforcement method capable of constructing a yield strength reinforcement with good workability that does not use an iron.

According to the yield strength reinforcing method according to the present invention, the subject is provided in a steel structure building, at least four pieces of a frame-like frame connected to each other, and a base material attached to an outer surface of the frame, A surface material attached to the outer surface of the base material, and a method for reinforcing the proof stress of the outer wall panel comprising at least
A step of removing a face material from the outer wall panel for reinforcing strength, a step of removing a base material exposed by removing the face material, and rigidity of the four pieces of the frame exposed by removing the base material A surface material removed in the step of fixing the plate having, a step of attaching a base material to the outer surface of the plate, and a step of removing the face material from the outer surface of the new base material And a step of attaching a material to provide a strength reinforcement.

  In this way, by applying strength reinforcement to the outer wall panel that requires strength reinforcement from the outside of the building, there is less to remove than the reinforcement work from the indoor side, the work is easy, and the plate is attached to the outer wall panel It can be reinforced without changing the appearance of the building by fixing it to the frame inside.

In addition, the beam covered with the outer surface material, the beam on which the outer wall panel is placed is disposed below the outer wall panel, and the frame exposed by removing the outer surface material after the step of fixing the plate. It is preferable to provide a step of joining with a reinforcing member having rigidity.
Thus, by transmitting the load applied to the frame to the beam by the reinforcing member, it is possible to increase the overall yield strength of the outer wall panel including the frame and the beam.

In the step of attaching the base material, it is preferable to attach a new base material that is thinner than the existing base material by the thickness of the plate.
In this way, by attaching a new base material that is thinner than the existing base material by the thickness that is increased by attaching the plate, the base part becomes flat, and the outer surface of the face material is the same as the outer surface of the other face material. A face material can be attached so as to become one.

Further, the plate is fastened to the frame with a plurality of fasteners, and the new base material has a number of holes corresponding to the fasteners that accommodate portions protruding from the frame in the fasteners. In the step of attaching the new base material, the projecting portion of the fastener is accommodated in the hole, and the new base material is attached to the frame. Is preferred.
In this way, by using a new base material having a hole that accommodates the protruding portion of the fastening portion, it is possible to prevent the new base material from coming into contact with the fastener, and to attach the new base material to the frame. Can be securely fixed.

The new base material has a two-layer structure of a first layer having the hole and a second layer not having the hole formed corresponding to the fastener, and the step of attaching the new base material In this case, it is preferable that the new base material is attached to the frame so that the fastener is accommodated in the hole of the first layer.
In this way, by setting the new base material to a two-layer structure, the thickness of the entire new base material can be adjusted by adjusting the thickness on the second layer side.

Further, in the step of fixing the plate, it is preferable to fix the plate having cutout portions at two corners positioned at least in the state of being attached to the frame among the four corners of the plate.
Thus, it becomes possible to prevent that an excessive load is applied to a flame | frame from the corner of a plate because a plate has a notch part in the two corners located below.

Further, in the step of fixing the plate, after fixing the plate having notches at at least two corners located below the four corners of the plate in a state of being attached to the frame, the plate is placed in a position that fits in the notches. It is preferable to arrange the reinforcing member.
Thus, by arranging the reinforcing member in the notch portion of the plate, it is possible to avoid the interference between the reinforcing member and the plate and to store the reinforcing member in a compact manner.

Further, in the step of fixing the plate, a plate having a plurality of through holes may be fixed.
Thus, by using a plate having a plurality of through-holes, the rigidity of the plate can be made suitable for reinforcing the strength of the attachment site.

  ADVANTAGE OF THE INVENTION According to this invention, with respect to the existing steel structure building, it is possible to reinforce strength without changing the appearance of the building, regardless of the indoor facilities, and without affecting the indoor environment. .

It is a schematic diagram which shows the house which gives strength reinforcement. It is a flowchart which shows the flow of the outer wall panel reinforcement method which concerns on this embodiment. It is a schematic diagram which shows the outer wall panel periphery which gives strength reinforcement. It is a schematic diagram which shows the outer wall panel periphery of the state which removed the face material. It is a schematic diagram which shows the outer wall panel periphery of the state which removed the base plywood. It is a schematic diagram which shows the operation | work which removes a base plywood. It is a perspective view which shows a 1st protection jig. It is a schematic diagram which shows a nail extraction operation | work. It is a front view which shows a 2nd protection jig. It is a front view which shows the panel frame of the state which attached the reinforcement steel plate. It is a schematic diagram which shows the state which attached the 1st reinforcement metal fitting and the 2nd reinforcement metal fitting to the trunk difference. (A) is a top view which shows a 1st reinforcement hardware, (b) is a front view which shows a 1st reinforcement hardware, (c) is a side view which shows a 1st reinforcement hardware. (A) is a top view which shows a 2nd reinforcement hardware, (b) is a front view which shows a 2nd reinforcement hardware, (c) is a side view which shows a 2nd reinforcement hardware. It is a schematic diagram which shows the state which attached the reinforcement board to the panel frame, the 1st reinforcement hardware, the 2nd reinforcement hardware, etc. FIG. (A) is a front view which shows a 1st mounting plate, (b) is a bottom view which shows a 1st mounting plate. It is a front view which shows a 2nd attachment board. It is a schematic diagram of the house which shows the state which attached the reinforcement steel plate to the flame | frame of some outer wall panels. It is a front view which shows the state which affixed the 1st layer of the base plywood on the reinforcing steel plate. It is a front view which shows the state which affixed the 2nd layer on the 1st layer of a base plywood. (A) is a front view which shows the state which affixed the base plywood on the reinforcement board, (b) is XXB-XXB sectional drawing of (a). (A) is a side view which shows a face material support jig | tool, (b) is a front view which shows a face material support jig | tool. It is a perspective view which shows the state which attached the face material support jig to the trunk difference. It is a perspective view which shows the attachment operation state of the face material on the base plywood using the face material support jig. It is a figure which shows the cross section of the outer wall panel and trunk difference after completion of a proof stress reinforcement construction.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that members, arrangements, and the like described below do not limit the present invention, and it goes without saying that various modifications can be made in accordance with the spirit of the present invention.
FIG. 1 schematically shows a house 1 to which construction of an outer wall panel reinforcing method according to an embodiment of the present invention is performed. In FIG. 1, the hatched wall area is a wall area related to the drainage drainage and the outer wall panel that need to be replaced in the present embodiment. In the following description, among the hatched wall areas, the wall area W1 will be specifically described, and the wall areas W2, W3, and W4 will be supplementarily described.

  As shown in FIG. 2, the outer wall panel reinforcing method according to the embodiment of the present invention includes a step S1 of removing the existing face material Wa, a step S2 of removing the base plywood Wc and the heat insulating plate Wd, and the reinforcing steel plate 7. A step S3 for attaching, a step S4 for attaching the first reinforcing metal piece 8 and the second reinforcing metal piece 9, a step S5 for attaching the base plywood We and Wg, and a step S6 for newly attaching the face material Wa are provided.

Hereinafter, each process S1-S6 is demonstrated.
<Step S1 of removing the existing face material>
First, the flat face material Wa of the outer wall panel 2 in the wall area W1 shown in FIG. 3 and the cosmetic body drainer Wb attached below the face material Wa are removed as shown in FIG. Specifically, the work of removing the face material Wa and the makeup drum drainer Wb is performed by cutting the peripheral sealing 10 with a cutter (not shown) and further fixing the face material Wa and the makeup drum drainer Wb. This is done by removing the putty on the screw with a cutter and removing the fixing screw with the driver 11. After removing the face material Wa and the drainage drainage Wb, the glass wool GW and the base plywood Wc as the heat insulating material are exposed from the outer wall panel 2, and the heat insulating plate Wd is exposed from the body difference 3. Become.

<Process S2 for removing base plywood and heat insulating board>
Next, the base plywood Wc and the heat insulating plate Wd are removed as shown in FIG. In particular, as shown in FIG. 6, the base plywood Wc is removed by a plurality of hardened nails 13 for fixing the base plywood Wc and the base plywood Wc, the panel frame 2a, and the column frame 4 in the base plywood Wc (see FIG. 8). This is done by separating the surrounding parts of

  Here, the panel frame 2a holds the glass wool GW as a heat insulating material, is made of steel having a U-shaped cross section, and is formed into a frame shape as a whole by connecting at least four pieces. .

  The base plywood Wc is removed by using a driver 11 having a front end of a horusoe 11a and a first protective jig 5 used to prevent the panel frame 2a from being damaged by the horusoe 11a.

  As shown in FIG. 7, the first protective jig 5 includes a long grip portion 5a provided at one end and a plate-shaped steel body 5b extending from the grip portion 5a to the other end. It is configured. An accommodation hole 5c for accommodating the hardened nail 13 is formed in the vicinity of the center of the main body 5b, and is wider than the quenched nail 13, and a through groove 5d connected to the other end of the accommodation hole 5c is formed. .

  Using the first protective jig 5 configured in this manner, the worker M first puts the hardened nail 13 between the base plywood Wc and the panel frame 2a through the through groove 5d, and the accommodation hole 5c. The first protective jig 5 is inserted so as to be accommodated in the container. Next, the operator M punches the periphery of the hardened nail 13 in the base plywood Wc with the hole saw 11a until it contacts the main body 5b of the first protective jig 5. In the base plywood Wc, all the places where the hardened nails 13 are fastened are perforated using the hole saw 11a and the first protective jig 5 in this manner, and the base plywood Wc is removed from the panel frame 2a.

In this way, after removing the base plywood Wc from the panel frame 2a, the hardened nail 13 remaining on the panel frame 2a is removed by the bar 12 as shown in FIG. At this time, the second protective jig 6 is used so that the bar 12 for removing the quenching nail 13 using the principle of the lever does not damage the panel frame 2a by coming into contact with the panel frame 2a.
As shown in FIG. 9, the second protective jig 6 includes a gripping portion 6a, a rod-like extension portion 6b extending from the gripping portion 6a, and an extension portion 6b extending from the extension portion 6b. It is comprised from the main body 6d which is a rectangular-shaped board | plate material attached so that it might become a longitudinal side perpendicular to a direction.
The main body 6d includes a joint portion 6c that protrudes from one surface and is fitted and joined with the extension portion 6b. The main body 6d is formed with two accommodation holes 6e for accommodating the remaining portion of the base plywood Wc cut by the hole saw 11a and the hardened nails 13. That is, the accommodation hole 6e is formed larger than the inner diameter of the horusoe 11a.

  Using the second protective jig 6 configured as described above, the worker M firstly sets the second plywood Wc cut by the horusoe 11a so that the remaining portion of the base plywood Wc is accommodated in the accommodation hole 6e. The protective jig 6 is placed along the panel frame 2a. Next, the operator M hooks the tip of the bar 12 on the head of the hardened nail 13, causes the second protective jig 6 to abut the part serving as a fulcrum, and tilts the bar 12 so that the principle of the lever is obtained. The quenching nail 13 is pulled out using.

<Step S3 of attaching the reinforcing steel plate>
Next, the upper and lower two reinforcing steel plates 7 that function directly for the strength reinforcement are attached to the panel frame 2 a and the column frame 4 with screws 17.
Here, as shown in FIG. 10, the reinforcing steel plate 7 is in the form of a steel plate, has a plurality of punch holes 7a in a matrix at predetermined intervals, and has a substantially square shape at the four corners on a plane. It has a notch 7b.
As described above, the punched holes 7a are formed at a predetermined interval and number, so that the reinforcing steel plate 7 is designed to have rigidity suitable for the outer wall panel 2 to be attached.

Further, the panel frame 2a, the column frame 4 and the reinforcing steel plate 7 are elastically deformed by shaking such as an earthquake. When notches 7 b are not formed at the four corners of the reinforcing steel plate 7, the reinforcing steel plate 7 is stretched by the corners having the largest deformation amount coming into contact with the panel frame 2 a or the column frame 4. As a result, the screw 17 fixed between the panel frame 2a and the column frame 4 may be removed. The reinforcing steel plate 7 has the notches 7b at the four corners thereof, so that the reinforcing steel plate 7 is not stretched and is prevented from coming off from the panel frame 2a and the column frame 4.
Further, the notch 7b also functions as a housing portion for reinforcing plates 20 and 21 to be described later.

<Process S4 for Attaching First Reinforcement Hardware and Second Reinforcement Hardware>
Next, as shown in FIG. 11, the first reinforcing hardware 8 and the second reinforcing hardware are positioned below the two notches 7 b below the reinforcing steel plate 7 in the upper flange 3 b of the trunk difference 3. 9 is attached so that it may be accommodated in the web 3a part.

  Here, the first reinforcing hardware 8 is for connecting a reinforcing plate 20 and a trunk difference 3 described later, and as shown in FIG. 12, an upper plate 8a fixed to the flange 3b, and an upper plate Two side plates 8b whose upper surfaces are joined to both sides of the lower surface of 8a, a front plate 8d joined to the front surfaces of the upper plate 8a and the two side plates 8b, and the upper plate 8a and the two side plates 8b And a back plate 8c joined to the opposite side of the front plate 8d.

The upper plate 8a has a through groove 8e, and a bolt 14 having a diameter slightly smaller than the width of the through groove 8e is passed from the upper side of the flange 3b, passed through the through groove 8e, and the lower surface side of the upper plate 8a. Then, the nut 16 is fastened to the bolt 3 by being fastened to the flange 3b.
Further, a reinforcing plate 20 described later is fixed to the front plate 8d by a drill screw 25 described later.

  The first reinforcing hardware 8 configured in this way is attached to the lower surface of the flange 3b located below the notch 7b at the lower left corner in FIG.

  The second reinforcing hardware 9 is for connecting a reinforcing plate 21 (described later) and the trunk difference 3, and as shown in FIG. 13, an upper plate 9a fixed to the flange 3b, and an upper plate 9a. Two side plates 9b whose upper surfaces are bonded to both sides of the lower surface of the upper plate 9a, a front plate 9d bonded to the front surfaces of the upper plate 9a and the two side plates 9b, and the opposite of the front plate 9d of the two side plates 9b. And a back plate 9c joined to the side.

The upper plate 9a has a through groove 9e, and a bolt 15 having a diameter slightly smaller than the width of the through groove 9e is passed from the upper side of the flange 3b, passed through the through groove 9e, and the lower surface side of the upper plate 9a. The nut 16 is fastened to the flange 3b by being fastened to the bolt 15.
The back plate 9c is longer than between the two side plates 9b, protrudes from the side plate 9b to both sides, and is joined to the side plate 9b. The back plate 9c has two mounting holes 9f in each of the portions on both sides protruding from the side plate 9b. The attachment hole 9f is for attaching the back plate 9c to the web 3a of the trunk difference 3 by passing the drill screw 25.
A reinforcing plate 21 described later is fixed to the front plate 9d by a drill screw 25 described later.

  In FIG. 11, the second reinforcing metal 9 configured in this manner is connected to the web 3a of the trunk difference 3 located below the notch 7b in the lower right corner by a drill screw 25, and a bolt 15 and a nut on the lower surface of the flange 3b. 16 is attached.

Next, as shown in FIG. 14, the reinforcing plate 20 is attached to the first reinforcing hardware 8 and the reinforcing plate 21 is attached to the second reinforcing hardware 9 and the like.
Here, the reinforcing plate 20 is made of steel, and fixes the joining hardware 18, the first reinforcing hardware 8, the panel frame 2 a, and the column frame 4. As shown in FIG. 15, the reinforcement plate 20 includes a first attachment plate 20 a attached to the metal joint 18, and a second attachment plate 20 b attached to the first reinforcement hardware 8, the panel frame 2 a and the column frame 4. Consists of

The first mounting plate 20a is formed with four through-holes 20c for fixing to the metal fitting 18 having eight holes 18a formed on the front side with bolts 15 and nuts (not shown). The through holes 20 c are formed with the same size and the same interval as the four holes 18 a among the eight holes 18 a of the metal joint 18.
On the second mounting plate 20b, four pilot holes 20e for fixing to the first reinforcing hardware 8 by a drill screw 25, and five pilot holes in each of two rows for fixing to the panel frame 2a and the column frame 4 are provided. 20e is formed. This prepared hole 20 e is formed at a position facing the front plate 8 d of the first reinforcing hardware 8, the panel frame 2 a, and the column frame 4 when the reinforcing plate 20 is attached to the joint hardware 18.
The second mounting plate 20b is formed with a through hole 20d that is formed to have a sufficient size so that the head of the bolt 15 can be accommodated. The first mounting plate 20a and the second mounting plate are overlapped and joined in a shifted state so that one of the through holes 20c and the through hole 20d are positioned on the same axis.

  The reinforcing plate 20 configured in this way is attached to the joint metal 18 positioned below the notch 7b at the lower left corner in FIG. 14 with the bolts 15, and the first reinforcement metal 8, the panel frame 2a and the column frame 4 are attached. It is attached with a drill screw 25.

  The reinforcing plate 21 is made of steel, and fixes the second reinforcing hardware 9, the panel frame 2a, and the column frame 4. As shown in FIG. 16, the reinforcing plate 21 includes six pilot holes 21 a for fixing to the second reinforcing hardware 9 by the drill screw 25, and two rows each for fixing to the panel frame 2 a and the column frame 4. Two pilot holes 21b are formed. The prepared hole 21 a is formed at a position facing the front plate 8 d of the first reinforcing hardware 8, the panel frame 2 a, and the column frame 4.

  The reinforcing plate 21 configured as described above is attached to the second reinforcing metal member 9, the panel frame 2 a, and the column frame 4 positioned below the notch 7 b at the lower right corner in FIG.

  The first reinforcing metal member 8, the second reinforcing metal member 9, and the reinforcing plates 20, 21 can be shaped as long as the body difference 3, the panel frame 2 a and the column frame 4 can be connected directly or indirectly. Is optional. In other words, the first reinforcing hardware 8, the second reinforcing hardware 9, and the reinforcing plates 20 and 21 are arbitrarily shaped according to the shape of the body difference 3 at the mounting position and the upper and lower panel frames 2a. Can do.

  For example, as shown in FIG. 17, the other wall sections W2, W3, and W4 may be reinforcing plates 22 that are formed long across the upper and lower floors, or may be reinforcing plates 23 that are attached to the base portion 24. The reinforcing hardware may be formed in a shape that matches these reinforcing plates 22 and 23.

<Step S5 of attaching base plywood We, Wg>
Next, as shown in FIGS. 18 to 20, the base plywood We is attached to the four circumferences and the central longitudinal direction on the reinforcing steel plate 7.

Here, the base plywood We is composed of two layers, a first layer We1 and a second layer We2. The base plywood We is thus composed of two layers, so that even after the first layer We1 is fixed to the panel frame 2a and the column frame 4, the thickness of the second layer We2 is adjusted. The thickness of the entire base plywood We can be easily adjusted.
As shown in FIGS. 18 and 20 (b), the first layer We1 is provided with a screw 17 so that the head of the screw 17 that fixes the reinforcing steel plate 7 and the panel frame 2a or the column frame 4 can be accommodated. A plurality of through holes Wf are formed at opposing positions.

  The second layer We2 is formed with substantially the same size as the first layer We1, but unlike the first layer We1, it does not have a through hole Wf.

  In this way, the base plywood We composed of the first layer We1 and the second layer We2 is fixed to the four circumferences of the column frame 4 and the reinforcing steel plate 7 with screws 27, and the portion along the central longitudinal direction of the reinforcing steel plate 7 is a wood screw. It is fixed by 28.

The base plywood We and the reinforcing steel plate 7 are formed such that the total thickness is the same as that of the existing base plywood Wc. In other words, the base plywood We is formed thinner by the thickness of the reinforcing steel plate 7 than the existing base plywood Wc.
By being formed in this way, a newly attached face material Wa, which will be described later, is attached flush with the surrounding face material Wa.

  Next, the base plywood Wg is attached to the portions on the reinforcing plates 20 and 21 exposed by the notches 7b. As shown in FIG. 20, the base plywood Wg on the reinforcing plate 21 is formed with a plurality of through holes Wh at positions where the heads of the drill screws 25 protruding on the reinforcing plate 21 can be accommodated. . Since the base plywood Wg is formed in this way, the base plywood Wg comes into close contact with the reinforcing plate 21.

<Process S6 for attaching face material>
Next, an adhesive is applied to the base plywood We and Wg, and the face material Wa is attached. Note that the face material Wa to be attached may be an existing one or a newly manufactured one. When attaching the face material Wa, a face material support jig 26 that supports the lower surface of the face material Wa is used to fix the heavy face material Wa at a target position.

  The face material support jig 26 is formed at a pair of long protruding portions 26X, an extending portion 26Y extending substantially perpendicularly from the longitudinal direction of the protruding portion 26X, and an end portion of the extending portion 26Y in the extending direction. The movable support portion 26Z that extends and contracts perpendicularly to the extending direction of the extending portion 26Y is mainly configured.

As shown in FIG. 21, the projecting portion 26X is engaged with a long screw portion 26h, a gripping portion 26i fixed to one end portion in the longitudinal direction of the screw portion 26h, and the other end side which is an upper side of the screw portion 26h. An accommodating portion 26b, a lower flange 26a disposed at one end below the screw portion 26h, and an upper flange 26c fixed to the other end of the accommodating portion 26b.
The screw portion 26h has a screw formed on the upper outer surface thereof, and is formed so as to be able to enter and leave the inside of the accommodating portion 26b having the female screw hole 26e. The screw portion 26h is rotatably supported by the lower flange 26a. For this reason, when the grip portion 26i is gripped and the screw portion 26h is rotated, the screw portion 26h moves into and out of the storage portion 26b, but the lower flange 26a, the storage portion 26b, and the upper flange 26c The rotational torque is not transmitted from the screw portion 26h, and the lower flange 26a, the accommodating portion 26b, and the upper flange 26c do not rotate.

  The extending portion 26Y has an extending piece 26d extending from the side surface of the accommodating portion 26b of the projecting portion 26X, and a female screw hole 26m perpendicular to the extending direction is formed at the extending side end of the extending piece 26d. Is formed. The extending portion 26Y extends from each of the pair of projecting portions 26X, and connecting rods 26l are joined to opposing surfaces of each extending piece 26d, and are integrally formed.

The movable support portion 26Z includes a long screw portion 26j, a gripping portion 26k fixed to the upper end portion of the screw portion 26j, a support flange 26f disposed above the screw portion 26j, and a pair of support flanges 26f. And a mounting table 26g fixed to the head.
The screw portion 26j has a screw formed on the lower outer surface, and is formed so as to be able to enter and leave the female screw hole 26m of the extending piece 26d. The screw portion 26j is rotatably supported by the support flange 26f. For this reason, when the grip portion 26k is gripped and the screw portion 26j is rotated, the screw portion 26j enters and leaves the female screw hole 26m of the extension piece 26d, but the support flange 26f has a screw portion 26j. Rotational torque is not transmitted from the support flange 26f, and the support flange 26f does not rotate.

  Next, an operation of attaching the face material Wa using the face material support jig 26 configured as described above to the base plywood We and Wg will be described.

First, the pair of projecting portions 26 </ b> X of the face material support jig 26 are arranged between the upper and lower flanges 3 b of the trunk difference 3 in an orientation in which the extending portion 26 </ b> Y is located on the outer side with respect to the trunk difference 3.
Next, the screw part 26h is protruded from the accommodating part 26b by rotating the grip part 26i of the pair of projecting parts 26X. In other words, the accommodating portion 26b is moved upward from the screw portion 26h, and the upper flange 26c fixed to the accommodating portion 26b is brought into contact with the lower surface of the upper flange 3b of the trunk difference 3. In this way, the face material support jig 26 is fixed to the trunk difference 3.

  Next, the amount of protrusion of the screw portion 26j from the extending piece 26d is adjusted by rotating the gripping portion 26k of the pair of movable support portions 26Z. The amount of protrusion is adjusted so that the upper surface of the mounting table 26g is substantially coincident with the lower end surfaces of the base plywoods We and Wg. In this way, the height of the upper surface of the mounting table 26g becomes equal to the lower end of the position where the face material Wa is attached.

  Next, after the face material Wa is placed on the placement table 26g, the face material Wa is pressed against the base plywood We and Wg. At this time, since the adhesive is applied to the base plywoods We and Wg, the face material Wa is temporarily fixed. Furthermore, as shown in FIG. 23, the screw 11 is used to screw the face material Wa and the base plywood We and Wg at the positions of the pilot holes formed in advance around the circumference of the face material Wa. Thus, the main work in the strength reinforcement work is completed, and as shown in FIG. 24, the reinforcing steel plate 7 is attached inside the outer wall panel 2, and the outer wall panel 2 and the trunk difference 3 are the first reinforcement. It is fixed by the hardware 8, the second reinforcing hardware 9, and the reinforcing plates 20 and 21, and the proof stress is increased.

  In the above embodiment, the yield strength reinforcing method of the present invention has been described. However, the above embodiment is for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

For example, in the above-described embodiment, the reinforcing steel plate 7 is attached to the outer wall panel 2 having the panel frame 2a not subjected to the proof stress reinforcement, and the first reinforcing hardware 8 and 9 for connecting the trunk difference 3 and the panel frame 2a are provided. Although described as what is attached, it is not limited to this.
Specifically, as shown in a wall area W2 in FIG. 17, the reinforcing steel plate 7 may be attached to an outer wall panel having a panel frame with braces Wi. Even in this case, the reinforcing steel plate 7 and the reinforcing hardware 8 and 9 can be attached in the same manner as in the above embodiment, which is beneficial when the existing proof stress is insufficient.

  Moreover, in this embodiment, although demonstrated as what attaches the 1st reinforcement metal objects 8 and 9 to the trunk difference 3 and the panel frame 2a, as shown to the wall area W4 of FIG. You may make it attach these between the base part 24 and the panel frame 2a.

  Further, the base plywood We has been described as being composed of two layers in order to facilitate the thickness adjustment, but it may be composed of one layer if there is no need to adjust the thickness. For example, the base plywood We may be standardized as being made of a polystyrene material.

1 house (building)
2 Outer wall panel 2a Panel frame 3 Body difference (beam)
3a web 3b flange 4 column frame 5 first protection jig 5a gripping part 5b main body 5c accommodation hole 5d through groove 6 second protection jig 6a gripping part 6b extension part 6c joint part 6d main body 6e accommodation hole
7 Reinforced steel plate
7a Punch hole 7b Notch 8 First reinforcement hardware (reinforcement member)
8a Upper plate 8b Side plate 8c Back plate
8d Front plate 8e Through groove 9 Second reinforcement hardware (reinforcement member)
9a Top plate 9b Side plate 9c Back plate 9d Front plate 9e Through groove 9f Mounting hole 10 Sealing 11 Driver 11a Horsor 12 Bar (tool)
13 Hardened nails (stopper)
14, 15 Bolt 16 Nut 17 Screw (fastener)
18 Joint metal 18a Hole 20, 21, 22, 23 Reinforcement plate (reinforcement member)
20a 1st mounting plate 20b 2nd mounting plate 20c, 20d Through hole 20e, 21a, 21b Pilot hole 24 Base part 25 Drill screw 26 Face material support jig (height adjustment jig)
26a Lower flange 26b Housing portion 26c Upper flange 26d Extension piece 26e, 26m Female screw hole 26f Support flange 26g Mounting base 26h Screw portion 26i, 26k Grip portion 26j Screw portion 26l Connecting rod 26m Female screw hole 26X Protruding portion 26Y Extension portion 26Z Movable support portion 27 Screw 28 Wood screw GW Glass wool M Worker W1, W2, W3, W4 Wall area Wa Face material Wb Makeup body drainer (second face material)
Wc base plywood (existing base material)
Wd Insulation board We Base plywood (new base material)
We1 1st layer We2 2nd layer Wf Through hole (hole)
Wg Base plywood Wh Through hole Wi brace

Claims (8)

A frame-shaped frame connected to at least four pieces, a base material attached to an outer surface of the frame, and a face material attached to an outer surface of the base material, provided in a steel structure building; A method for reinforcing the proof stress of an outer wall panel comprising at least
Removing the face material from the outer wall panel for strength reinforcement;
Removing the exposed base material by removing the face material;
Fixing a rigid plate to the four pieces of the frame exposed by removing the base material; and
Attaching a base material to the outer surface of the plate;
Attaching the face material removed or the new face material in the step of removing the face material to the outer surface of the new base material, and performing the strength reinforcement. Covered with an outer surface material, a beam on which the outer wall panel is placed is disposed below the outer wall panel,
2. The method of reinforcing strength according to claim 1, further comprising, after the step of fixing the plate, a step of joining the beam exposed by removing the outer surface material and the frame with a reinforcing member having rigidity.   The method of reinforcing a yield strength according to claim 1 or 2, wherein in the step of attaching the base material, a new base material thinner than the existing base material by a thickness of the plate is attached. The plate is fastened to the frame with a plurality of fasteners,
In the new base material, holes for receiving portions projecting from the frame in the fastener are formed at a number, size, and interval corresponding to the fastener,
4. The method of reinforcing a yield strength according to claim 3, wherein, in the step of attaching the new base material, the new base material is attached to the frame so that the protruding portion of the fastener is accommodated in the hole. . The new base material has a two-layer structure of a first layer having the hole and a second layer not having the hole formed corresponding to the fastener,
5. The yield strength according to claim 4, wherein in the step of attaching the new base material, the new base material is attached to the frame so that the fastener is received in the hole of the first layer. Reinforcement method. In the step of fixing the plate,
The proof stress according to any one of claims 1 to 5, wherein the plate having a cutout portion is fixed to at least two corners located below the four corners of the plate in a state of being attached to the frame. Reinforcement method. In the step of fixing the plate,
Among the four corners of the plate, the reinforcing member is disposed at a position that fits into the notch after fixing the plate having the notch at two corners located at a lower position in a state of being attached to the frame. The yield strength reinforcing method according to claim 2. In the step of fixing the plate,
The yield strength reinforcing method according to claim 1, wherein the plate having a plurality of through holes is fixed.

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