JP2014198963A - Panel replacement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel replacement method with good workability suitable for reinforcing bearing force or changing a room arrangement of an existing building.SOLUTION: First, a girth 4 is exposed by removing a girth face material above an external panel 2X. Next, a fastener fastening the external panel 2X to the girth 4 is removed. Subsequently, the girth 4 is lifted by extending a jack 5 placed between support hardware 6 which is fixed to the girth 4 and arranged in a manner that extends from an outer face of a house, and a ground surface with an upper plate 5d at an upper edge of the jack 5 placed against the support hardware 6. Then, the external panel 2X is removed and, last, a new external wall panel 2Z is installed to a place where the external panel 2X is removed therefrom.

Description

  The present invention relates to a panel replacement method, and more particularly to a panel replacement method suitable for replacing an outer wall panel of an existing building.

  2. Description of the Related Art Generally, 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 or screw-fixed by welding. 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, proof reinforcement may be necessary for some of the outer wall panels due to the loss of the weight-proof balance of the house.

Further, for example, an air conditioner installation contractor who does not know the structure of the wall may make a hole in the wall without involving the contractor in order to pass a cooling pipe or the like. In such a case, the air-conditioner installation contractor may damage the brace or the panel frame and open a hole, thereby reducing the proof strength of the outer wall panel.
From such a background, it may be necessary to apply a new strength reinforcement work to an existing building such as a 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

  Since the strength reinforcement method disclosed in Patent Document 1 is to fix a brace to a wooden column of a wooden house with a screw, the brace can be easily formed with a screw on a steel column included in a steel structure building. Could not be installed and could not be easily applied to the strength reinforcement 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 on the entire outer wall in order to make the face materials flush with each other, which requires extra 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, it is necessary to secure manpower because welding cannot be performed unless it is a qualified person. Furthermore, it is necessary to prepare a welding machine and a 200V power source, and since the welding machine is a large machine, it is difficult to carry in or unload it depending on the location. For these reasons, it was not practical to attach the brace to the steel column of the building by welding.

  In addition, as described above, in order to make the weight balance collapsed by attaching the solar cell appropriate, for example, the outer wall with a weak proof window is changed to an outer wall with a brace without a strong proof window. There may be a need. When it is necessary to change the floor plan in this way, especially for multi-storey buildings, the outer wall panel of the lower floor part is fixed to the trunk difference overlapping the floor part of the upper floor. Work was difficult.

As described above, there has been a demand for a yield strength reinforcing method and a floor plan changing method with good workability for existing buildings.
An object of the present invention is to solve the above-mentioned problems, and to provide a panel replacement method with good workability that is suitable for reinforcing the strength of existing buildings or changing the floor plan.

  According to the present invention, there is provided a panel exchanging method for replacing the outer wall panel in an existing building having a plurality of outer wall panels, and exposing a beam by removing a body surface material above the existing outer wall panel. A projecting member fixed to the beam and projecting from an outer surface of the building, the projecting member being fixed to the beam and projecting from the outer surface of the building. Extending the jack disposed between the ground and the ground and pressing the upper end of the jack to lift the beam; removing the existing outer wall panel from the building; and And a step of attaching a new outer wall panel to the place where the outer wall panel is removed.

  Thus, by lifting the beam with the jack, the existing outer wall panel under the beam can be removed and replaced with a new outer wall panel. For this reason, by replacing the existing outer wall panel with an outer wall panel having a higher yield strength, it is possible to reinforce the yield strength without performing welding regardless of whether the building is a wooden or a steel structure. Also, unlike the conventional method of attaching braces to the outer surface of an existing outer wall panel, the thickness of the new outer wall panel is made the same as that of the existing outer wall panel, so that it can be flush with the surrounding surface material. .

Further, in the step of lifting the beam, the protruding member partially including a plane portion is used, the protruding member is fixed to the beam so that the lower surface of the plane portion is horizontal, and the upper end of the jack is fixed to the plane It is preferable that the beam is lifted by pressing against the lower surface of the portion.
In this way, by pressing the upper end of the jack against the flat surface of the protruding member, a substantially uniform pressing force is applied to the protruding member according to the extension of the jack, and the beam is stably pushed up via the protruding member. be able to.

Further, in the step of removing the existing outer wall panel or the step of attaching the new outer wall panel, a fulcrum portion that is supported by the beam so as to be able to rotate directly or indirectly and serves as a fulcrum, and one end of the fulcrum portion. An extrusion jig comprising: an operation portion that is fixed to the other end portion and extends to the other end portion; and an abutting portion that is disposed between the one end portion and the other end portion of the operation portion and is in surface contact with the outer wall panel. It is preferable to operate and operate the operation portion and to push out and remove the existing outer wall panel, or to push out and attach the new outer wall panel with the fulcrum portion as a fulcrum.
As described above, by using the extrusion jig including the fulcrum part, the operation part, and the contact part, it becomes easy to remove the existing outer wall panel or attach a new outer wall panel.

Further, in the step of removing the existing outer wall panel, a support member is attached to the indoor side of the beam above the outer wall panel to be removed, and the fulcrum portion of the extrusion jig can be rotated on the support member. It is preferable that the operation portion is rotated with the fulcrum portion as a fulcrum, and the abutment portion is abutted against the outer wall panel and pushed out.
As described above, by attaching the support member to the indoor side of the beam, the extrusion jig can be installed at a position suitable for removing the outer wall panel to be removed.

Further, in the step of attaching the new outer wall panel, a support member is attached to the outdoor side of the beam above the new outer wall panel, and the fulcrum portion of the extrusion jig is rotatably attached to the support member. It is preferable that the operation portion is rotated with the fulcrum portion as a fulcrum, and the abutting portion is pushed out by being brought into contact with the outer wall panel.
As described above, by attaching the support member to the outdoor side of the beam, the extrusion jig can be installed at a position suitable for attaching the outer wall panel to be attached.

Further, in the step of attaching a new outer wall panel, the new outer wall panel having a different type from the existing outer wall panel may be attached.
In this way, an external wall panel of a different type from the existing external wall panel, for example, an existing external wall panel without a window sash is removed and a new external wall panel with a window sash is newly attached to change the position of the window. The strength can be improved by attaching an outer wall panel having a frame that can cope with the change and has a higher strength.

  According to the panel exchanging method of the present invention, it is possible to provide a panel exchanging method with good workability that is suitable for strengthening the strength or changing the floor plan of an existing building.

It is a schematic diagram which shows the circumference | surroundings of the outer wall panel of replacement | exchange object. It is a schematic diagram which shows the state which removed the trunk | drum surface material. It is a perspective view which shows the state which attached the support metal fitting, the jack, and the support member set to the trunk difference. FIG. 4 is a sectional view taken along the line IVA-IVA in FIG. 3. FIG. 4B is a sectional view taken along the line IVB-IVB in FIG. 4A. It is IVC-IVC cross-sectional arrow view of FIG. 4A. (A) is a schematic diagram which shows the state which installed the extrusion jig in the room in order to remove the existing outer wall panel, (b) shows the state which operated the extrusion jig and pushed the existing outer wall panel out of the room It is a schematic diagram. (A) is a schematic diagram showing a state where an extrusion jig is installed outside the room for attaching a new outer wall panel, and (b) shows a state where a new outer wall panel is pushed into the room by operating the extrusion jig. It is a schematic diagram. (A) is a schematic diagram which shows a frame with a skin plate reinforcement steel plate, (b) is a schematic diagram which shows a frame with a brace, (c) is a schematic diagram which shows a frame with a window sash.

  Hereinafter, an embodiment of a panel replacement method 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.

The panel replacement method according to the embodiment of the present invention is a method of replacing the outer wall panel 2X in the existing house 1 having a plurality of outer wall panels 2.
Each component will be described later, but the panel replacement method according to this embodiment is
(1) removing the body surface materials 3X and 3Y above the outer wall panels 2X and 2Y to expose the body difference 4, and
(2) removing the mounting bolt 2c for fastening the outer wall panel 2X and the trunk difference 4;
(3) An upper plate 5d of the jack 5 is formed by extending a jack 5 disposed between the support metal 6 and the ground G upward to a support metal 6 that is fixed to the trunk difference 4 and protrudes from the outer surface of the house 1. To lift the trunk difference 4 by pressing
(4) removing the outer wall panel 2X from the house 1,
(5) The process mainly includes a step of attaching a new outer wall panel 2Z to a place where the outer wall panel 2X is removed.

Next, with reference to FIGS. 1-4, each component which concerns on the panel replacement | exchange method which concerns on the said this embodiment is demonstrated.
The outer wall panel 2 to be replaced in the panel replacement method according to the present embodiment is the outer wall panel 2X shown in FIG.
As shown in FIG. 4A, the outer wall panels 2, 2 </ b> X, and 2 </ b> Y are made of a glass wool GW disposed so as to be surrounded by a steel frame 2 f, an outer surface material 2 a facing the outside of the house 1, and the steel frame 2 f. And a wooden crosspiece 2b attached to the inside of the house 1 of the frame 2f.
In particular, the outer wall panel 2X has a frame 2f that has been perforated by an air conditioner installation contractor and needs to be replaced for strength reinforcement, and will be described later in detail. Therefore, it is necessary to change the type of the frame 14 with a window sash. The outer wall panel 2Y is disposed adjacent to the outer wall panel 2X.

The body difference 4 is a steel H-shaped beam having a web 4a between upper and lower end flanges, and is horizontally above the outer wall panels 2X and 2X between the first floor and the second floor in this embodiment. It is arranged across. Further, the metal fitting 8 having a plurality of tap holes 8a and 8b used for attachment of a support metal 6 described later is attached to the barrel difference 4 at a predetermined interval.
The body surface materials 3, 3 </ b> X, 3 </ b> Y cover the outer surface of the body difference 4. In particular, the body surface materials 3X and 3Y are respectively disposed above the outer wall panel 2X to be replaced and above the outer wall panel 2Y provided next to the outer wall panel 2X.

The support metal 6 is made of steel and is used for lifting the trunk difference 4 by a jack 5 described later.
As shown in FIG. 3 and FIGS. 4A to 4C, the support hardware 6 is, in order from the side attached to the trunk difference 4, has a cross-sectional T shape and a long attachment portion 6 a in one direction, and a cross-sectional H shape. The first protrusion 6b joined so as to extend perpendicularly to the longitudinal direction of the attachment part 6a has substantially the same shape as the first protrusion 6b, and H of the first protrusion 6b It is mainly comprised from the 2nd protrusion part 6c which shifted | deviated to one of the extending directions of the web in a shape (above in the attachment state of the trunk | drum 4), and was joined to the 1st protrusion part 6b.

  The attachment 6a is fastened to the tap hole 8a with one screw 6d and fastened to the tap hole 8b with three screws 6e, so that the support metal 6 is fixed to the joint metal 8.

  As shown in FIGS. 3, 4A and 4C, the jack 5 includes a lower plate 5e mounted on the ground G, a cylindrical main body 5a extending upward from the lower plate 5e, and a female screw on the inner surface. A rotating portion 5b that is rotatably supported by the main body 5a, and has a threaded portion 5g of an external thread on the outer surface of the lower end, and is screwed into the rotating portion 5b and extends to the inside of the main body 5a. And a cylindrical expansion / contraction part 5c that can be accommodated, and an upper plate 5d fixed to the upper end of the expansion / contraction part 5c.

  The jack 5 is disposed at a position where the jack 5 comes into contact with the lower surface of the second protruding portion 6c of the support metal 6 to be pushed up when the expandable portion 5c is extended. Strictly speaking, the jack 5 is disposed so that the lower plate 5e is placed on an iron plate (not shown) laid on the ground G and a plywood (not shown) in order to stabilize the posture.

  Next, a method for exchanging the outer wall panel 2X with a new outer wall panel 2Z will be specifically described.

(1) The process of removing the trunk surface materials 3X and 3Y above the outer wall panels 2X and 2Y and exposing the trunk difference 4 First, in order to expose the trunk difference 4, the trunk surface materials 3X and 3Y shown in FIG. The surrounding sealing 20 is cut with a cutter, and the body surface materials 3X and 3Y are removed from the house 1 as shown in FIG.

(2) Step of removing the mounting bolt 2c for fastening the outer wall panel 2X and the trunk difference 4 Next, the mounting bolt 2c shown in FIG. 4A for fastening the outer wall panel 2X and the trunk difference 4 is removed. By removing the mounting bolt 2c in this manner, the outer wall panel 2X can be detached from the trunk difference 4, and the load on the outer wall panel 2X is not applied when the trunk difference 4 is lifted in a later process. Further, a mounting bolt (not shown) that fastens the outer wall panel 2Y and the trunk difference 4 is loosened by a predetermined amount. In this way, when lifting the trunk difference 4 in a later step, the load of the outer wall panel 2Y is prevented from being applied to the trunk difference 4, and the lifting of the trunk difference 4 is not hindered.

(3) An upper plate 5d of the jack 5 is formed by extending a jack 5 disposed between the support metal 6 and the ground G upward to a support metal 6 that is fixed to the trunk difference 4 and protrudes from the outer surface of the house 1. Next, the jack 5 shown in FIG. 3 and FIG. 4 is disposed below the supporting metal 6 attached to the trunk difference 4 via the joint metal 8. A long rotating jig 10 is attached to the rotating portion 5 b of the jack 5. The rotating jig 10 can increase the distance from the center of rotation on the axis of the main body 5a in the rotating portion 5b to the portion where the force is applied, and the torque of the rotating portion 5b with respect to the same force can be increased.

Then, the rotating part 5b is rotated in one direction around the axis of the main body 5a by using the rotating jig 10, and a female screw formed on the inner surface of the rotating part 5b and a screw part 5g formed on the outer surface of the expandable part 5c. The expansion / contraction part 5c accommodated in the main body 5a is protruded upward (elongated) by changing the relative screwing position.
And after extending the expansion-contraction part 5c and making the upper board 5d contact | abut on the lower surface of the support metal object 6 (specifically 2nd protrusion part 6c), the body difference | interval 4 is further interposed through the support metal object 6. FIG. In this embodiment, the load applied to the outer wall panel 2X from the trunk difference 4 is reduced by about 3 or 4 mm. Here, because the height to lift the trunk difference 4 is short at about 3 and 4 mm, there is little influence on the second floor, but the room will not be inclined, so just in case, such as furniture on the second floor While checking the state, the lifting operation of the trunk difference 4 is performed.

(4) The process of removing the outer wall panel 2X from the house 1 Next, the operation | work which removes the outer wall panel 2X from the house 1 is performed. Although this work and the work of attaching a new outer wall panel 2Z to be described later may be performed manually, in order to perform the work more simply, it is performed using an extrusion jig 9 described below.
The pushing jig 9 operates using the principle of the lever, and the operation rod 9a, the rotation support portion 9b provided at one end of the operation rod 9a, and the action protruding from the intermediate portion of the operation rod 9a. Part 9c.

  The rotation support portion 9b supports the operation rod 9a so as to be rotatable with respect to the transfer rod 15 fixed to the trunk difference 4, and protrudes perpendicularly to the longitudinal direction of the operation rod 9a. An end portion 9d on the protruding side of the rotation support portion 9b has an arc shape in cross section, and extends in a direction perpendicular to the protruding direction of the rotation support portion 9b from the operation rod 9a. The end 9d is rotatably attached to the transfer rod 15 by a clamp (not shown).

  The action part 9c is in contact with the outer wall panel 2X to be pushed out (and a new outer wall panel 2Z to be described later), and applies pushing force based on the force applied by the operator to the operation rod 9a to the pushing target. , And protrudes in a direction parallel to the protruding direction of the rotation support portion 9b with respect to the operation rod 9a. An end portion 9e on the protruding side of the action portion 9c is formed in a columnar shape and extends in a direction perpendicular to the protruding direction of the action portion 9c from the operation rod 9a. Since the end portion 9e is formed in a columnar shape, a force is always applied to the member in contact with the end portion 9e in the radial direction of the end portion 9e during the turning operation of the operation rod 9a.

Next, the operation of removing the outer wall panel 2X from the house 1 using the extrusion jig 9 configured as described above will be described.
First, a cloth (not shown) on the indoor side of the outer wall panel 2X and the gypsum board PB shown in FIG. 4A are peeled off so that the extrusion jig 9 can come into contact with the outer wall panel 2X from the indoor side. At this time, the glass wool GW of the outer wall panel 2X is removed.
Next, in order to secure an installation space and a rotation space for the extrusion jig 9, a part of the top plate 11 on the first floor located above the outer wall panel 2X is removed to form a work space 11a.

  Next, the transfer rod 15 is attached to the steel frame portion such as the trunk difference 4 above the outer wall panel 2X. Here, the direction in which the transfer rod 15 is attached is the direction in which the longitudinal direction of the transfer rod 15 is perpendicular to the direction in which the outer wall panel 2X is pushed out. Then, the end 9d is attached to the transfer rod 15 with a clamp (not shown) so that the operation rod 9a can be rotated in the vertical direction.

  Next, the operating rod 9a is pushed in and rotated in a direction in which the action portion 9c approaches the outer wall panel 2X, and a contact plate 9f is disposed between the action portion 9c and the wooden crosspiece 2b on the outer wall panel 2X. . Further, the operating rod 9a is pushed in until the upper part of the outer wall panel 2X is separated from the trunk difference 4, and the upper part of the outer wall panel 2X is pushed out of the house 1 through the action part 9c.

  And the outer wall panel 2X is removed from the house 1 by pulling it out of the room while lifting the outer wall panel 2X away from the trunk difference 4 upward.

(5) Step of attaching a new outer wall panel 2Z to the place where the outer wall panel 2X is removed Next, an operation of attaching the new outer wall panel 2Z to the house 1 is performed. This operation is performed using the extrusion jig 9 as described above.

The support member set 7 is used to dispose the rotation support portion 9b of the extrusion jig 9 so as to be rotatable above the position where the outer wall panel 2X is removed.
As shown in FIG. 3, the support member set 7 has a mounting plate 7b at one end and a projecting bar 7a extending vertically from the mounting plate 7b, and is vertically passed between the two projecting bars 7a and clamps 7e. It is comprised from the transfer rod 7d fixed by.

The support member set 7 configured in this manner is attached to the outdoor side of the web 4a of the trunk difference 4 above the position where the outer wall panel 2X is removed.
Specifically, the mounting plates 7b of the two protruding rods 7a are fixed to the web 4a of the trunk difference 4 with bolts 7c at intervals in the horizontal direction. Then, the transfer rod 7d is passed so as to straddle the two protruding rods 7a, and each of the two protruding rods 7a and the transfer rod 7d are fixed by the clamp 7e.
And the end part 9d of the rotation support part 9b of the extrusion jig | tool 9 is attached to the transfer rod 7d with the clamp which is not shown in figure so that rotation is possible to an up-down direction.

Further, a new outer wall panel 2Z is prepared, and the lower end of the outer wall panel 2Z is arranged at a position where the lower end of the outer wall panel 2X before being removed is arranged.
Next, the operating rod 9a is pushed in and rotated in the direction in which the action portion 9c approaches the outer wall panel 2Z, and the contact plate 9f is disposed between the action portion 9c and the upper portion of the outer surface material 2a of the outer wall panel 2Z. . Further, the operation bar 9a is pushed in until the outer wall panel 2Z is erected vertically.

  Next, the rotating portion 5b of the jack 5 is operated to contract the expansion / contraction portion 5c of the jack 5 downward, and the push-up of the trunk difference 4 through the support metal 6 by the jack 5 is released. The outer wall panel 2Z is sandwiched between the trunk difference 4 and the base B when the trunk difference 4 released from the jack 5 is moved downward. Then, the outer wall panel 2Z is fixed to the base B, the trunk difference 4, and a pillar (not shown) with bolts and nuts, and the mounting of the outer wall panel 2Z is completed.

  Furthermore, after the installation of the outer wall panel 2Z to the house 1 is completed, a part of the removed top plate 11 is newly attached to secure the work space 11a for pushing out the outer wall panel 2X, and the gypsum board PB is installed on the indoor side of the outer wall panel 2Z. Then, a cloth (not shown) is pasted, a new body surface material 3 and a heat insulating material are attached to the outer surface of the body difference 4, and repair work is performed, so that the panel replacement work is completely completed.

According to the present invention, when the above-described existing outer wall panel 2X is replaced with a new outer wall panel 2Z, when the frame 2f of the outer wall panel 2X is damaged, the outer wall panel 2Z provided with the new frame 2f that is not damaged. However, the outer wall panel 2 may be replaced for other purposes.
For example, the outer wall panel 2X having a low yield strength even if not damaged may be replaced with a different type of outer wall panel 2Z that has been reinforced.
Specifically, the frame 12 with skin plate reinforced steel plate to which the steel plate as shown in FIG. 7A is fixed, or the outer wall panel 2X having a weak proof strength formed simply in a rectangular shape, or FIG. You may make it replace | exchange for the new outer wall panel 2 provided with the flame | frame 13 with a brace as shown in FIG.

In addition, the present invention can be applied to the case where the outer wall panel 2 is replaced for the purpose of changing the floor plan. For example, when an outer wall without a window is used as an outer wall with a window, an outer wall panel 2X with a normal frame 2f without a window sash is replaced with a type having a frame 14 with a window sash as shown in FIG. A different outer wall panel 2 may be exchanged. Conversely, the outer wall panel 2 having the frame 14 with the window sash may be replaced with an outer wall panel having the normal frame 2f having no window sash.
In addition, for example, the present invention may be used to remove and attach the outer wall panel 2 for changing the position of the ventilation fan or for expansion and reconstruction.

1 house (building)
2,2X, 2Y, 2Z Outer wall panel 2a Face material 2b Wooden crosspiece 2c Mounting bolt (fastener)
2f Frame 3, 3X, 3Y Body surface material 4 Body difference (beam)
4a Web 5 Jack 5a Body 5b Rotating part 5c Extendable part 5d Upper plate (upper end)
5e Lower plate 5f Mounting hole 5g Screw part 6 Support hardware (protruding member)
6a Mounting portion 6b First protruding portion 6c Second protruding portion (planar portion)
6d, 6e Screw 7 Support member set 7a Projection rod 7b Mounting plate 7c Bolt 7d Transfer rod (support member)
7e Orthogonal clamp 8 Joint metal 8a, 8b Tap hole 9 Extrusion jig 9a Operation rod (operation part)
9b Rotation support part (fulcrum part)
9c action part 9d end part 9e end part 9f contact plate (contact part)
DESCRIPTION OF SYMBOLS 10 Rotating jig 11 Top plate 11a Work space 12 Frame with skin plate reinforced steel plate 13 Frame with brace 14 Frame with window sash 15 Transfer rod (support member)
20 Sealing B Base G Ground GW Glass wool

Claims (6)

A panel replacement method for replacing the outer wall panel in an existing building having a plurality of outer wall panels,
Removing the body surface material above the existing outer wall panel and exposing the beam;
Removing a fastener for fastening the existing outer wall panel and the beam;
Push the upper end of the jack by extending the jack disposed between the projecting member and the ground to the projecting member fixed to the beam and projecting from the outer surface of the building. Hitting and lifting the beam;
Removing the existing outer wall panel from the building;
Attaching a new outer wall panel to the place where the existing outer wall panel is removed. In the step of lifting the beam,
Using the projecting member including a flat portion in part,
2. The beam according to claim 1, wherein the protruding member is fixed to the beam in a direction in which a lower surface of the flat portion is horizontal, and the upper end of the jack is pressed against a lower surface of the flat portion to lift the beam. Panel replacement method. In the step of removing the existing outer wall panel or the step of attaching the new outer wall panel,
A fulcrum part that is supported by the beam so as to be capable of rotating directly or indirectly, and serves as a fulcrum; an operation part that has one end fixed to the fulcrum part and extends to the other end; and the one end part of the operation part And an extruding jig provided with an abutting portion disposed between the other end portion and in surface contact with the outer wall panel,
3. The panel replacement method according to claim 1, wherein the operation unit is operated, and the existing outer wall panel is pushed out and removed, or the new outer wall panel is pushed out and attached using the fulcrum part as a fulcrum. .   In the step of removing the existing outer wall panel, a support member is attached to the indoor side of the beam above the outer wall panel to be removed, and the fulcrum portion of the extrusion jig is rotatably attached to the support member. The panel replacement method according to claim 3, wherein the operation portion is rotated with the fulcrum portion serving as a fulcrum, and the contact portion is brought into contact with the outer wall panel and pushed out.   In the step of attaching the new outer wall panel, a support member is attached to the outdoor side of the beam above the new outer wall panel, and the fulcrum portion of the extrusion jig is rotatably attached to the support member, The panel replacement method according to claim 3, wherein the operation portion is rotated with a fulcrum portion as a fulcrum, and the abutting portion is abutted against the outer wall panel and pushed out.   6. The panel replacement method according to claim 1, wherein in the step of attaching a new outer wall panel, the new outer wall panel having a different type from the existing outer wall panel is attached.

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