JP2018096062A - Folded-plate roof repair construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folded-plate roof repair construction method which can efficiently construct a renovated roof or a newly constructed roof while removing an existing roof.SOLUTION: In an existing folded-plate roof A provided with a trapezoidal existing tight frame 2 having two leg parts 21 and a top part 22 arranged at a predetermined interval on an existing structural member 4 and an existing folded-plate roof board 1 supported by the previously placed tight frame 2, the existing folded-plate roof board 1 is removed from the existing tight frame 2. At least one point of the existing tight frame 2 is cut by using a cutter 9 provided with a holder part 91 having a fixed blade 95 and a hydraulic cylinder part 93 having a movable blade 94. Repair is performed to reduce the height of the existing tight frame 2 on the existing structural member 4. A repair tight frame B1 which can be mounted by non-welding means is mounted on the existing structural member 4, and the folded-plate roof board material 5 for repair is mounted via the repair tight frame B1 to construct a repair folded-plate roof B.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a folded plate roof repair method capable of efficiently constructing a modified roof or a new folded plate roof while removing an existing roof.

  In recent years, many buildings constructed in the past have become obsolete all at once, and such obsolete buildings tend to increase. In particular, the roof is exposed to the harshest conditions, and therefore has a particularly high degree of aging compared to other parts. In the future, it is expected that there will be an increase in repair work for such aged buildings.

  In particular, aging metal folded-plate roofs are increasing and their refurbishment is required. There are various methods for the renovation. In general, the renovation work is to construct a new roof as it is on an existing roof, or to construct a renovated folded-plate roof (new folded-plate roof) after removing the existing roof. For example, Patent Document 1 exists as a type for constructing a new roof as it is on an existing roof.

  A type in which a modified (newly constructed) roof is formed on an existing roof is often used because it can be easily and inexpensively. In this way, it is often used to form a repair (new construction) roof on the existing roof, and this kind of technology development is also being carried out a lot. However, there are various conditions such as whether or not the existing tight frame that supports the existing roof can still be used sufficiently even if it is used for many years as a condition for the repair work. .

JP 2014-40720 A

  On the other hand, there is a case where it is dangerous and inconvenient to form a repaired (newly installed) roof on the existing roof while the whole or part of the existing roof is removed. For example, in a building that does not have a ceiling plate or the like under an existing roof in factories, warehouses, etc., the metal folded plate roof plate material or the related parts constituting the aging existing roof corrode. Some may fall into the room.

  In such a state, workers work in dangerous situations inside the building. Therefore, there are a method of removing only the existing folded-plate roof plate material and spreading the modified (newly-installed) folded-plate roof plate material, and a method of removing and modifying the existing tight frame. When it is confirmed that the existing tight frame is not reusable due to aging, the latter method is selected.

  However, in an old building having a metal roof, a tight frame that supports the metal roof plate is often fixed to a steel existing structure such as a beam or a purlin by welding. For this reason, the work to remove the tight frame from the existing structural material may cause sparks at the time of cutting to remove the welded part, or the removed object will fall from a high place, etc. It was extremely dangerous, it was extremely difficult to ensure safety, and the cost was high. Therefore, an object of the present invention is to minimize the removal of members constituting an existing metal folded plate roof and to efficiently generate a modified roof (which may be referred to as a new folded plate roof). The purpose is to provide a modified folded-plate roof construction method.

Therefore, as a result of intensive researches to solve the above problems, the inventor has found that the invention of claim 1 has a trapezoidal shape having two legs and a top arranged at predetermined intervals on an existing structural material. In an existing folded plate roof provided with an existing tight frame and an existing folded plate roof plate material supported by the existing tight frame, the existing folded plate roof plate material was removed from the existing tight frame, and a fixed blade was attached. A holder part having a receiving part and a hydraulic cylinder part having a movable blade and attached to the holder part, the movable blade reciprocating by the operation of the hydraulic cylinder part meshing with the fixed blade In addition, using a cutting machine that is spaced apart, cut at least one portion of the existing tight frame, repair the existing tight frame on the existing structural material so that the height direction is lowered, and on the existing structural material, No welding By installing a modified tight roof that can be installed in steps, and installing a modified folded plate roof plate material through the modified tight frame to construct a modified folded plate roof, Solved the above problem.

  The invention of claim 2 is the folded plate roof repair method according to claim 1, wherein the holder part of the cutting machine is configured to be arranged in parallel to the axial direction of the hydraulic cylinder part. Solved the problem. The invention of claim 3 is the folding plate roof repair method according to claim 1 or 2, wherein the repair tight frame is mounted at a position between the opposing leg portions of the existing tight frame. Solved the problem.

  According to a fourth aspect of the present invention, in any one of the first, second, and third aspects, both the leg portions of the existing tight frame are cut to remove the top portion, and both the legs are placed on the existing structural material. The above problem was solved by adopting the folded-plate roof repair method that leaves a part of the part. The invention according to claim 5 is the folded plate roof refurbishing method according to any one of claims 1, 2, or 4, wherein the cut portion of the existing tight frame is near the root of the existing structural member of the leg portion. As a result, the above problems were solved.

The invention of claim 6 is the invention according to any one of claims 1, 2, or 4, wherein the cut portion of the existing tight frame is near the upper end of the leg portion, and the leg portion facing the leg portion after cutting the leg portion is the The above-mentioned problem has been solved by adopting a folded-plate roof refurbishment method that falls on the existing structural material. According to a seventh aspect of the present invention, in any one of the first, second, and third aspects, the cut portion of the existing tight frame is the top portion, and the leg portions that face each other after the top portion is cut are overlaid on the existing structural material. The above problem was solved by adopting the folded plate roof repair method.

  According to the first aspect of the present invention, after the folded plate roof plate material is removed from the trapezoidal existing tight frame having two legs and the top arranged at predetermined intervals on the existing structural material, at least one of the existing tight frames is provided. Cut the part and perform a process such as pushing both legs down against each other to repair the existing tight frame in the height direction. A cutting machine that cuts at least one portion of the existing tight frame includes a holder portion having a receiving portion and a hydraulic cylinder portion that has a movable blade and is attached to the holder portion. The movable blade meshes with and separates from the receiving portion by reciprocating.

  Therefore, the cutting method by the cutting machine for the existing tight frame is sheared, and chips, noise, and sparks can be prevented from being generated in the cutting process. Thereby, the cutting operation of the existing tight frame can be performed without noise and safely. Furthermore, since the existing tight frame is sheared by meshing with the fixed blade by the reciprocating movement of the movable blade of the cutting machine, the cut portion has a relatively orderly shape, and the removal site of the existing tight frame is safely discarded can do.

  A folded plate is formed by mounting a modified tight frame that can be mounted by non-welding means (mounting means that does not use welding) on the existing structural material, and mounting the modified folded plate roof plate material through the modified tight frame. The roof was repaired. Thereby, the said existing tight frame cut | disconnects and removes a part, and the existing tight frame can construct a repair (new installation) folded-plate roof by minimum removal operation | work. As a result, the repair work can be simplified, the burden on the worker involved in the work can be greatly reduced, and the safety can be further ensured.

  In the invention of claim 2, the holder portion of the cutting machine is configured to be arranged in parallel in the axial direction of the hydraulic cylinder portion, so that an arbitrary portion of the existing tight frame on the existing structural material is provided. When cutting, by placing the holder part in parallel along the longitudinal direction (Y direction) of the existing structural material, the operator can use the cutting machine at a position very close to the existing structural material. Safety can be ensured and the efficiency of the work of cutting the existing tight frame can be further improved.

  According to a third aspect of the present invention, the repaired (newly installed) folded plate constitutes a modified (newly installed) folded plate roof by mounting the modified tight frame at a position between the opposing leg portions of the existing tight frame. The position of the roof plate material and the existing folded plate roof plate material of the existing folded plate roof can be made substantially the same position, and the construction of the repaired (newly) folded plate roof having the same structure as the existing folded plate roof before removal. Can be easy.

  Furthermore, a modified tight frame that can be mounted by non-welding means is installed at a position between the opposing leg portions of the existing tight frame. Therefore, there is no remainder of the existing tight frame on the flange of the existing structural material at the position of the gap between the cut leg portions of the existing tight frame, and installation of the repaired tight frame on the flange is extremely It can be done easily and quickly.

  According to a fourth aspect of the present invention, there is provided a folded plate roof repair method in which both the leg portions of the existing tight frame are cut and the top portion is removed, and a part of the both leg portions is left on the existing structural material. The top portion of the existing tight frame is completely removed, and the work of repairing the height position after cutting of the existing tight frame can be simplified.

  In the invention of claim 5, the cutting position of the existing tight frame is near the root of the existing structural material of the leg portion, so that the tight frame is almost entirely removed from the existing structural material, and the cutting is performed. At the same time, the process of repairing the existing tight frame can be completed, and the construction efficiency can be improved.

  In the invention of claim 6, the cut portion of the existing tight frame is near the upper end of the leg portion, and the leg portions facing each other after the leg portion is cut down on the existing structural member, thereby cutting both the leg portions. It can be made easier. In the invention of claim 7, the number of cutting operations can be reduced by making the cut portion of the existing tight frame the top portion, and by tilting the opposing leg portions on the existing structural material after cutting the top portion. .

(A) thru | or (E) is a front view which shows the process of constructing a clamped type | mold repair folding plate roof based on 1st Embodiment of the cutting | disconnection of this invention. (A) is an enlarged front view in which both legs of an existing tight frame are cut by the cutting method of the first embodiment, (B) is an enlarged front view showing a state in which both legs of an existing tight frame are cut, (C) FIG. 4 is an enlarged front view of a state where a modified tight frame is attached to a flange of an existing structural material. (A) is an enlarged front view showing a state in which both legs of the existing tight frame are cut by the cutting method of the second embodiment of the present invention, and (B) is a case where the modified tight frame is attached to the flange of the existing structural material. The enlarged front view of the state which pushed down both the remaining leg parts a little, (C) is a front view of the repaired folding plate roof repaired based on 2nd Embodiment of this invention. (A) is a perspective view of a modified tight frame, (B) is a side view of the modified tight frame, and (C) is a side view of a main part having a partial cross-section in a state where the modified tight frame is mounted on a flange of an existing structural material. is there. (A) thru | or (D) is a front view which shows the process of constructing superposition | polymerization type repair folding board roof based on 1st Embodiment of the cutting | disconnection of this invention. (A), (B) is the front view cut | disconnected by the cutting method of 3rd Embodiment of this invention, (B) is a front view of the state which mounted | wore the flange of the existing structural material with the repair tight frame. The front view of embodiment by which the repair tight frame was installed on a part of leg seat board of the leg part lower end which is the existing tight frame removed in this invention and remains on the existing structural material. (A) is a side view showing the configuration of the cutting machine device, (B) is a plan view showing the configuration of the cutting machine, and (C) is a perspective view showing the configuration of the cutting machine. (A) is a perspective view of a state in which the leg portion of the existing tight frame on the existing structural material is cut by a cutting machine, and (B) is a step in which the leg portion of the existing tight frame on the existing structural material is cut by the cutting machine. (C) is the state figure which completed the cutting | disconnection of the leg part of the existing tight frame on the existing structural material with a cutting machine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. There are multiple embodiments of the present invention. The present invention includes two processes, a dismantling process for an existing folded-plate roof A and a construction process for a modified folded-plate roof B (see FIG. 1). Here, the modified folded board roof B may be referred to as a newly installed folded board roof B.

The existing folded plate roof A includes an existing folded plate roof plate material 1 and an existing tight frame 2. The modified folded-plate roof B is provided with a modified tight frame B1 that can be mounted on the existing structural material 4 without welding (mounting means that does not use welding), and a folded-plate roof plate material 5 for modification (new installation). . The existing structural material 4 is used for the construction of the modified folded-plate roof B after the existing folded-plate roof A is removed (see FIG. 1).

  The existing folded-plate roof A and the modified folded-plate roof B have various folded-plate types, and a superposition type (see FIG. 1) and a superposition type in which trapezoidal chevron portions are overlapped and connected (see FIG. 5)). The folded plate roof plate material 1 constituting the existing folded plate roof A and the folded plate roof plate material 5 constituting the modified folded plate roof B have the same structure.

  Here, in order to distinguish the respective folded plate roof plate materials constituting the existing folded plate roof A and the modified folded plate roof B, the existing folded plate roof plate material constituting the existing folded plate roof A is simply a folded plate roof plate material. 1, the repaired or newly installed folded plate roof plate material constituting the modified folded plate roof B is simply referred to as a folded plate roof plate material 5.

  The existing folded plate roof A is constructed as a clamped type roof on the existing structural material 4 such as a purlin through the existing tight frame 2 and the hanging element 3. Here, as for the folded-plate roof board | plate material 1 and the folded-plate roof board | plate material 5, the longitudinal direction is made into X direction, and the direction orthogonal to a longitudinal direction is called Y direction. In the present invention, the Y direction of the folded plate roof plate material 1 and the folded plate roof plate material 5 is the width direction (see FIGS. 1 to 3 and the like).

  Rising side portions 12 and 12 are formed from both side portions of the main plate 11 in the Y direction (width direction), top portions 13 and 13 are formed from both ends of the compatible ascending side portions 12 and 12, and from one end of the top portions 13 and 13 A lower collar portion 14a is formed, and an upper collar portion 14b is formed at the end of the other top portion 13 (see FIG. 1).

  Further, the folded plate roof plate material 5 constituting the modified folded plate roof B is formed with rising side portions 52, 52 from both side portions of the main plate 51 in the Y direction (width direction), and from both ends of the compatible rising side portions 52, 52 to the top portions. 53, 53 are formed, a lower collar portion 54a is formed from one end of the top portions 53, 53, and an upper collar portion 54b is formed at the other end of the top portion 53 [FIG. 1 (E), FIG. 3 (C) etc.].

The existing tight frame 2 is mounted at a predetermined interval along the Y direction of the flange 41 of the existing structural material 4. Then, a plurality of existing folded roof plate members 1, 1... Are arranged in parallel on the existing tight frames 2, 2,. Adjacent folded roof plates 1, 1 have a lower flange portion 14 a and an upper flange portion 14 b that are clamped together with the hanger 3 and fixed on the existing tight frame 2. The existing folded-plate roof A is comprised by such a structure [refer FIG. 1 (A)]. The existing structural material 4 is a steel mold, and H-shaped steel, I-shaped steel, groove-shaped steel, or the like is used.

  The existing folded plate roof A of the superposed type has trapezoidal semi-mountain shaped mountain portions 15 and 15 on both ends in the Y direction of the main plate 11 of the folded plate roof plate material 1. And the existing folded-plate roof A is comprised by superposing the mountain-shaped parts 15 and 15 of the adjacent folded-plate roof board | plate materials 1 and 1 (refer FIG. 5). In this case, the top portion of the existing tight frame 2 is configured to be flat, and the bolt shaft portion 23 is provided. Then, the peak portions of the angle portions 15, 15 are superposed, the bolt shaft portion 23 passes through the peak portions, and a nut is fastened and fixed to the bolt shaft portion 23.

  Similarly, the folded-plate roof plate material 5 in the modified folded-plate roof B also has angle portions 55, 55 on both sides in the Y direction. And the mountain-shaped parts 55 and 55 of the adjacent folded-plate roof board | plate materials 5 and 5 are superposed | polymerized, and the modified folding-plate roof B is constructed (refer FIG. 5). In this case, the top portion 73 of the existing tight frame 2 is configured to be flat, and a bolt shaft portion 74 is provided on the top portion 73. And the peak parts of the mountain-shaped parts 55 and 55 are overlap | superposed, the said bolt shaft part 74 penetrates through the peak parts, and the nut is fastened and fixed to the bolt shaft part 74 [FIG.5 (D )reference〕.

  Next, the two steps of the dismantling process of the existing folded-plate roof A and the construction process of the modified folded-plate roof B will be described. In disassembling the existing folded-plate roof A, first, the lower and upper flange portions 14a and 15b of the adjacent folded-plate roof plate materials 1 and 1 are separated (see FIGS. 1A and 1B). At this time, the suspension 3 is also separated from the lower collar part 14a or the upper collar part 14b. A number of existing tight frames 2, 2,... Remain on the flange 41 of the existing structural material 4 (see FIG. 1C).

  The existing tight frame 2 includes two leg portions 21 and 21 and a top portion 22, and the top portion 22 and both leg portions 21 and 21 have a substantially trapezoidal shape. A leg seat plate 21a is formed at the lower end of the leg portion 21, and the leg seat plate 21a is fixed to the existing structural member 4 by welding (see FIGS. 1A and 1B). In addition, the existing tight frame 2 may be a single body or an embodiment in which a plurality of the existing tight frames 2 are continuous by the leg seat plate 21a.

  At least a part of the existing tight frame 2 is cut, and along with the cutting, a process of lowering the existing tight frame 2 from its original height in the height direction is performed. The process of lowering in the height direction means that the existing tight frame 2 is cut and the remaining part of the existing tight frame 2 remaining on the existing structural material 4 is pushed down on the flange 41 of the existing structural material 4. Means means that the remaining portion is lowered in the height direction. The cutting with respect to the existing tight frame 2 is one or more places.

  The cutting machine 9 used for cutting is preferably a hand-held type, and is small and lightweight. The cutting operation (means) of the cutting machine 9 is shearing. As the cutting machine 9, a blade member that is movable relative to each other or a blade member that is movable on one side and fixed on the other side is used. The power used for cutting is a hydraulic mechanism, an electric mechanism, or manually. Here, in the cutting operation, a disk-shaped grindstone that rotates at high speed, a saw, or a material that generates sparks or chips such as fusing by gas is not adopted from the viewpoint of fire prevention.

  The configuration of the cutting machine 9 that satisfies the above conditions includes a holder portion 91 having a receiving portion 92, a hydraulic blade portion 93 having a movable blade 94 and attached to the holder portion 91, and a movable blade 94. (See FIG. 8). The hydraulic cylinder section 93 includes a cylinder casing 93a and a piston 93b that protrudes and protrudes from the cylinder casing 93a. A movable blade 94 is attached to the tip of the piston 93b. Here, in the cutting machine 9, the longitudinal direction of the holder part 91 is defined as the Y direction. In addition, a direction orthogonal to the Y direction when the cutting machine 9 is viewed from the top, that is, a plane, is defined as an X direction [see FIG.

  The movable blade 94 is engaged with and separated from the receiving portion 92 by the operation of the hydraulic cylinder portion 93, that is, the piston 93b is reciprocated by hydraulic pressure. A fixed blade 95 is attached to the receiving portion 92 side. In addition, the fixed blade 95 is not attached to the receiving portion 92, and the portion to be cut of the existing tight frame 2 may be cut while receiving the movable blade 94 only by the receiving portion 92.

  The cutting machine 9 is provided with a pump 9P and an electric motor 9m that operates the pump 9p, and these constitute a set to form a cutting machine device (see FIG. 8A). In the cutting machine device, the cutting machine 9 starts the electric motor 9m, controls the pump 9p, and operates the piston 93b of the hydraulic cylinder section 93 to enter and exit. The hydraulic cylinder 93 and the pump 9p are connected by a hydraulic hose 96 so as to be hydraulically operated. The movable blade 94 and the fixed blade 95 are detachable from the cutting machine 9, respectively, and the movable blade 94 is mounted on a mounting portion 93c provided at the tip of the piston 93b with a fixing tool such as a screw. The fixed blade 95 is attached to a mounting portion 92a provided in the receiving portion 92 with a fixing tool such as a screw.

  The cutting process to the existing tight frame 2 by the cutting machine 9 is performed so that the desired cutting position of the existing tight frame 2 is located between the receiving portion 92 of the cutting machine 9 and the movable blade 94, and the electric motor 9m Is started, and the movable blade 94 is brought close to the receiving portion 92 together with the piston 93b, thereby cutting a desired portion of the existing tight frame 2 (see FIG. 9A).

  In addition, when the fixed blade 95 is attached to the receiving portion 92 and the movable blade 94 comes close to the fixed blade 95, the tooth tips of the both can cross each other, that is, mesh with each other. The cutting work efficiency can be further improved, and the cutting work can be speeded up. The cutting machine 9 having the above-described configuration is instantaneous even if it has a shape that is difficult to cut with a normal scissor type cutting machine, such as a type in which the reinforcing ribs 21b are formed on the legs 21 and 21 of the existing tight frame 2. (See FIGS. 9A and 9B).

  Further, the holder portion 91 is juxtaposed with the hydraulic cylinder portion 93 so as to be parallel to the axial direction of the hydraulic cylinder portion 93, that is, the direction in which the piston 93b protrudes and retracts (FIGS. 8A and 8C). reference〕. Thereby, when the arbitrary position (desired cutting location) of the existing tight frame 2 on the existing structural material 4 is cut by the cutting machine 9, the longitudinal direction of the holder portion 91 is set to the longitudinal direction of the existing structural material 4 (Y Direction) (see FIG. 9B).

  Since the cutting machine 9 is configured as described above, when the cutting machine 9 is used to cut the leg portion 21 of the existing tight frame 2, the Y direction of the holder part 91 of the cutting machine 9; If the Y direction of the existing structural material 4 is matched, the holder portion 91 and the existing structural material 4 can be arranged in parallel. Furthermore, by placing the cutting machine 9 at a position very close to the flange 41 of the existing structural material 4 and cutting the legs 21 of the existing tight frame 2, the worker can take safety in an extremely stable posture. It is possible to work while ensuring, and work efficiency can also be improved (see FIG. 9).

  There are three embodiments of the cutting process by the cutting machine 9 for the existing tight frame 2. First, as 1st Embodiment of a cutting process, each of both the leg parts 21 and 21 of the existing tight frame 2 is cut | disconnected in the base location vicinity with the existing structural material 4. FIG. That is, the vicinity of the lower end of the leg portion 21 is cut (see FIGS. 1B, 1C, and 2).

  As a result, the existing tight frame 2 remaining on the flange 41 of the existing structural member 4 becomes a part of the lower part of the both leg portions 21 and 21. A gap S is formed between the leg portions 21 and 21 left on the flange 41 of the existing structural material 4, and the gap S is a mounting position of a modified tight frame B1 described later [FIG. C) to (E), see FIGS. 2B and 2C].

  Further, both the leg portions 21 and 21 of the existing tight frame 2 left on the flange 41 of the existing structural material 4 remain only at the lower part, which is considerably lower than the original height of the existing tight frame 2. The process of lowering in the vertical direction is completed when the legs 21 and 21 are cut (see FIG. 1C). In other words, in this embodiment, it can be said that the process of lowering the existing tight frame 2 in the height direction can be omitted.

  The second embodiment of the cutting is cutting of the upper positions of both legs 21 and 21 of the existing tight frame 2 (see FIG. 3). The upper positions of both the leg portions 21 and 21 are positions away from the position of the flange 41 of the existing structural member 4, and in the cutting operation, the cutting machine 9 is difficult to contact the flange 41 of the existing structural member 4 and is not interfered. There is an advantage that the cutting work can be easily performed (see FIG. 3A).

  Since the portions of both legs 21 and 21 of the existing tight frame 2 left on the flange 41 exist up to the upper part thereof, the height direction can be adjusted by pushing the legs 21 and 21 slightly toward each other. Lower (see FIG. 3B). That is, the process which makes a residual part low is performed by pushing down both the leg parts 21 and 21 left on the flange 41 a little.

Here, the angle between the legs 21 and 21 between the legs 21 and 21 between the legs 21 and 21 is set so that the upper ends thereof do not interfere with each other when pushed down. It is necessary to provide a gap so that the modified tight frame B1 can be installed. Further, it is preferable that the both leg portions 21 and 21 are slightly pushed down so as to be close to the modified tight frame B1 (see FIGS. 3B and 3C).

  The third embodiment of cutting is to cut the top portion 22 of the existing tight frame 2 (see FIG. 6). In the cutting of the top portion 22, both the leg portions 21 and 21 remain on the flange 41 of the existing structural material 4, and a process for reducing the height is required. At this time, a part of the top portion 22 is left at the upper ends of both the leg portions 21 and 21 together with the both leg portions 21 and 21. Therefore, the process of lowering the remaining portion of the existing tight frame 2 pushes down both the leg portions 21 and 21, and the upper end of the both leg portions 21 and 21 or a part of the cut top portion 22 overlaps with each other. [See FIG. 6 (A)].

In this case, when the height between the leg portions 21 and 21 of the existing tight frame 2 is reduced, both the leg portions 21 and 21 overlap each other. Therefore, it becomes difficult to install the modified folded-plate roof B between the both leg portions 21 and 21. Therefore, the installation position of the modified tight frame B1 is set between the adjacent existing tight frames 2 and 2 (see FIG. 6B). Further, the modified tight frame B1 is installed so as to straddle between the adjacent existing tight frames 2 and 2 and on the leg seat plate 21a at the lower end of the leg 21 even in cases other than the above. (See FIG. 7).

When the above-described cutting operation of the existing tight frame 2 and the process of reducing the height direction are completed, the repaired tight frame B1 is installed on the flange 41 of the existing structural material 4 (see FIG. 1D). The modified tight frame B1 will be described later, but no welding means is used for mounting on the existing structural member 4. That is, the modified tight frame B1 is a non-welded type. In the cutting of the existing tight frame 2 in the first and second embodiments, the modified tight frame B1 is placed at the position of the gap S existing between the both leg portions 21 and 21 left on the flange 41.
Is installed.

At this time, it is preferable that the position of the suspension 3 attached to the existing tight frame 2 before cutting and removal coincides with the position of the modification suspension 3 attached to the top 73 of the repair tight frame B1. Next, the folded folded roof sheet material 5 is disposed on the top 73 of the modified tight frame B1, and the folded folded roof sheet material 5 adjacent to the lower flange portion 54a and the upper flange portion 54b is clamped via the suspension 3. , 5 are connected, and the modified folded-plate roof B is constructed by repeating this sequentially (see FIG. 1E).

Next, a specific embodiment of the modified tight frame B1 will be described. First, as the wording which shows a direction in this description, like the existing folded-plate roof board | plate material 1, the X direction and the Y direction are used. Accordingly, the direction in which the folded plate roof plate members 5, 5,... Constituting the modified folded plate roof B to be constructed are arranged in the Y direction, and the direction which is the longitudinal direction of each folded plate building plate member 5 is the X direction. . Therefore, the longitudinal direction of the existing structural material 4 is the Y direction.

As described above, the modified tight frame B1 is a non-welded type that is attached to the existing structural member 4 without using welding. There are various kinds of such modified tight frames B1, and an example thereof is shown below based on FIG. Refurbishment tight frame B1
The pedestal 6, the receiving portion main body 7, and the locking member 8 are included. The pedestal 6 includes a substantially rectangular base plate 61 and hanging side portions 62 and 62. In the base plate 61, two through holes 63, 63 are formed at predetermined intervals along the longitudinal direction.

  The receiving portion main body 7 is formed in a plate shape and a column shape, and is installed at the center position in the longitudinal direction (X direction) of the base plate 61 of the pedestal 6. The columnar part 71 of the receiving part main body 7 has a base part 72 and a top part 73. The columnar portion 71 rises vertically on the base plate 61. The shape of the top portion 73 is stepped or flat, and when the folded plate roof plate material 5 for rehabilitation of the tightening type is used, the hanging member 3 is required, so that the stepped shape is suitable. A bolt shaft portion 74 is attached to the top portion 73 as necessary, and is used for attaching the suspension 3.

  The locking member 8 includes a locking body 81 having a substantially U-shaped cross section and a fastening screw portion 82. The locking body 81 is a member in which a metal plate material is formed in a substantially U-shaped cross section, and both ends of the flange portion 41 of the existing structural material 4 in the X direction can be inserted into the U-shaped locking member 3. Yes. A fastening screw portion 82 is mounted on the upper piece of the locking main body 81. The fastening screw portion 82 includes a screw shaft portion 82a and a nut 82b, and the nut 82b is screwed to the screw shaft portion 82a. It is the composition to do.

  The width direction (Y direction) of the locking main body 81 of the locking member 8 can be accommodated in both hanging side portions 62, 62 on both sides in the width direction (Y direction) of the base 6 (see FIG. 4A). Two locking members 8 are provided for one pedestal 6, and the screw shaft portions 82 b of the fastening screw portions 82 a of the respective locking members 8 are respectively provided from the lower surface side of the base plate 11 of the pedestal 1. The nut 82b is inserted into the through hole 63 and screwed into the screw shaft portion 82b from the upper surface side of the base plate 11.

The modified tight frame B1 includes a locking body 81 having a substantially U-shaped cross section of the two locking members 8, 8.
81, the both ends of the flange portion 41 of the existing structural member 4 in the X direction are sandwiched and locked (see FIG. 4C). Then, by tightening the nut 82 b against the screw shaft portion 82 a of the tightening screw portion 82, the flange 41 of the existing structural material 4 is tightened by the lower end of the hanging side portion 62 of the base 6 and the locking members 8, 8. The fixed side frame 62 of the pedestal 6 is fixed to the flange 41 of the existing structural member 4 so that the modified tight frame B1 is mounted on the existing structural member 4 [FIGS. 1 (C), 2 (C). FIG. 4 (C) etc.].

A ... Existing folding plate shop, 1 ... Existing folded plate roofing material, 21 ... Leg part, 22 ... Top part,
2 ... Existing tight frame, 4 ... Existing structural material, B ... Modified folded-plate roof,
B1 ... Tight frame for repair, 5 ... Folded plate roof plate for repair, 9 ... Cutting machine, 91 ... Holder part,
92 ... receiving part, 93 ... hydraulic cylinder part, 94 ... movable blade, 95 ... fixed blade.

Claims (7)

  An existing folded plate comprising a trapezoidal existing tight frame having two legs and a top arranged at predetermined intervals on an existing structural material, and an existing folded plate roof plate supported by the existing tight frame In the roof, the existing folded plate roof plate material is removed from the existing tight frame, a holder part having a receiving part to which a fixed blade is attached, and a hydraulic cylinder part having a movable blade and attached to the holder part. Using the cutting machine in which the movable blade that reciprocates by the operation of the hydraulic cylinder portion engages and separates from the fixed blade, and cuts at least one place of the existing tight frame, The above-mentioned existing tight frame is repaired so that the height direction is lowered, and a modified tight frame that can be mounted by non-welding means is mounted on the existing structural material, and the repair is performed via the modified tight frame. Folded plate roof renovation method characterized by comprising by applying a renovation folded plate roof wearing the folded plate roof plate material.   The folded plate roof refurbishing method according to claim 1, wherein the holder portion of the cutting machine is configured to be arranged in parallel to the axial direction of the hydraulic cylinder portion.   3. The folded plate roof refurbishing method according to claim 1 or 2, wherein the refurbishment tight frame is mounted at a position between the opposing leg portions of the existing tight frame.   In any one of Claims 1, 2, or 3, both the said leg parts of the said existing tight frame are cut | disconnected, the said top part is removed, and a part of both said leg parts is left on the said existing structural material. Folded plate roof repair method characterized by   5. The folded plate roof repair method according to claim 1, wherein a cut portion of the existing tight frame is near a root of the leg portion with the existing structural material.   The cut portion of the existing tight frame is near the upper end of the leg portion according to any one of claims 1, 2, or 4, and the opposing leg portion after the leg portion is cut down on the existing structural member. Folded plate roof repair method characterized by The cut portion of the existing tight frame is the top portion according to any one of claims 1, 2, or 3, and the opposing leg portions after the top portion is cut are overlaid on the existing structural material. Folded plate roof repair method.

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