JP6867786B2 - Folded plate roof repair method - Google Patents

Description

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

In recent years, many buildings constructed in the past have deteriorated all at once, and such deteriorated buildings tend to increase. In particular, the roof is exposed to the harshest conditions, so it is particularly aging compared to other parts. Therefore, it is expected that the number of repair works for such dilapidated buildings will increase in the future.

In particular, the number of old metal folded-plate roofs is increasing, and its repair is needed. There are various construction methods for the repair. In general, the renovation work is to construct a new roof as it is on the existing roof, or to remove the existing roof and then construct a renovated folded plate roof (new folded plate roof). The type in which a renovated (new) roof is laid on top of an existing roof is often used because it is easy and inexpensive. In this way, it is often adopted to lay a renovated (new) roof on the existing roof, and this kind of technological development is also being carried out a lot. However, there are various conditions for performing repair work, such as whether or not the existing tight frame that supports the existing roof can still be used sufficiently even if it has been used for many years. ..

Japanese Unexamined Patent Publication No. 2014-40720

On the other hand, there are cases where it is dangerous and inconvenient to lay a renovated (new) roof on the existing roof while removing all or part of the extremely old existing roof. For example, in a building such as a factory or a warehouse where a ceiling plate or the like is not provided under the existing roof, the metal folded plate roof plate material or related parts constituting the old existing roof is corroded. Some may fall into the room.

In such a state, the worker will work in a dangerous situation inside the building. Therefore, there are a method of removing only the existing folded plate roof plate material and roofing the repaired (newly installed) folded plate roof plate material, and a method of removing and repairing the entire existing tight frame. If it is confirmed that the existing tight frame cannot be reused due to aging, the latter method will be selected.

However, in an old building having a metal roof, the tight frame supporting the metal roof plate is often fixed to the existing steel frame structural material such as a beam or a main building by welding. Therefore, the work of removing the tight frame from the existing structural material may cause sparks during cutting to remove the welded part, or the removed object may fall from a high place. 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 roof a repaired roof (which may be referred to as a new folded-plate roof). It is to provide a renovated folded plate roof construction method.

Therefore, as a result of diligent research to solve the above problems, the inventor has applied the invention of claim 1 to a trapezoidal shape having two legs and a tops 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 is removed from the existing tight frame, and both legs of the existing tight frame are removed. The portion is cut, the remaining portion of the existing tight frame is left on the existing structural material, and a gap is formed between both legs of the remaining portion left on the flange of the existing structural material, and the existing portion is formed. matches to be lower in the height direction of the existing tight frame structural member, the gap on the existing structural material is mounted renovation tight frame mountable without producing welding means, through the renovation tight frame The above problem was solved by adopting a folded-plate roof repair method in which a folded-plate roof plate material for repair is attached and a repair-folded plate roof is constructed.

According to the first aspect of the present invention, the legs of the existing tight frame are cut to remove the tops, and a part of the legs is left on the existing structural material. The above problem was solved by adopting the plank roof repair method. The above problem is solved by making the invention of claim 3 a folded plate roof repair method in which the cut portion of the existing tight frame is near the root of the leg portion with the existing structural material in claim 1 or 2. did.

According to a first or second aspect of the present invention, 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 is tilted onto the existing structural material after the leg portion is cut. The above problem was solved by adopting the folded plate roof repair method.

In the invention of claim 1, after removing the folded plate roof plate material 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. by cutting a portion, performs processing such pushed down towards the legs to the other sides, low yield Mel the existing tight frame in the height direction.

Then, a repaired tight frame that can be mounted by non-welding means (mounting means that does not use welding) is mounted on the existing structural material, and a repaired folded plate roof plate material is mounted via the repaired tight frame. The roof repair method was adopted. As a result, the existing tight frame is removed by cutting a part thereof, and the existing tight frame can be repaired (newly installed) with a folded plate roof with a minimum of removal work. As a result, the repair work can be simplified, the burden on the workers involved in the work can be significantly reduced, and the safety can be further ensured.

Further, in the invention of claim 1, the repaired tight frame is mounted at a position between the two opposing legs of the existing tight frame to form a repaired (newly installed) folded plate roof. The position of the folded-plate roof plate material and the existing folded-plate roof plate material of the existing folded-plate roof can be approximately the same, and the renovated (newly installed) folded-plate roof has almost the same configuration as the existing folded-plate roof before removal. Construction can be simplified.

Further, in the invention of claim 1, a repaired tight frame that can be attached by non-welding means is installed at a position between the two opposing legs of the existing tight frame. Therefore, at the position of the gap between the cut legs of the existing tight frame, there is no remaining part of the existing tight frame on the flange of the existing structural material, and the repaired tight frame is extremely installed on the flange. It can be done easily and quickly.

In the invention of claim 2, by a folded plate roof repair method in which both legs of the existing tight frame are cut and the top is removed, and a part of both legs is left on the existing structural material. , which top portion of the existing tight frame is completely removed, it can work to Ru contained lower the height position after a cutting of the existing tight frame easily.

In the invention of claim 3, since the cut portion of the existing tight frame is set near the root of the leg portion with the existing structural material, substantially the entire tight frame is removed from the existing structural material and cut. at the same time it is possible to complete the process of Ru contained low existing tight frame, it is possible to improve the construction efficiency.

In the invention of claim 4, the cut portion of the existing tight frame is located near the upper end of the leg portion, and after the leg portion is cut, the opposing leg portion is tilted onto the existing structural material to cut both legs. It can be made easier to do. The cutting portion of the existing tight frame is the top portion, and the number of cutting operations can be reduced by tilting the facing leg portion onto the existing structural material after cutting the top portion.

(A) to (E) are front views showing a process of constructing a tightening type refurbished folded plate roof based on the first embodiment of cutting of the present invention. (A) is an enlarged front view in which both legs of the 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 the existing tight frame are cut, (C). Is an enlarged front view of the flange of the existing structural material with the repaired tight frame attached. (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 repaired tight frame is attached to the flange of the existing structural material. An enlarged front view of a state in which both remaining legs are slightly pushed down, (A) is a front view of a refurbished folded plate roof refurbished based on the second embodiment of the present invention. (A) is a perspective view of the repaired tight frame, (B) is a side view of the repaired tight frame, and (C) is a side view of a main part of the repaired tight frame mounted on a flange of an existing structural material. (A) to (E) are front views showing the steps of constructing a polymerization type refurbished folded plate roof based on the first embodiment of cutting of the present invention. (A) and (B) are front views cut by the cutting method of the third embodiment of the present invention, and (B) is a front view of a state in which a repaired tight frame is attached to a flange of an existing structural material. It is a front view of the embodiment which installs the repair tight frame at the position between adjacent removed existing tight frames in this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. There are a plurality of embodiments of the present invention. The present invention includes two steps, a dismantling step of the existing folded plate roof A and a construction process of the repaired folded plate roof B (see FIG. 1). Here, the repaired folded plate roof B may be referred to as a newly installed folded plate roof B.

The existing folded plate roof A includes an existing folded plate roof plate material 1 and an existing tight frame 2. The repaired folded plate roof B includes a repaired 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 repair (new construction). .. The existing structural material 4 is used for the construction of the repaired folded plate roof B after the existing folded plate roof A is removed (see FIG. 1).

The existing folded plate roof A and the repaired folded plate roof B have various types of folded plates, and are a tightening type (see FIG. 1) and a polymerization type in which trapezoidal chevron portions are polymerized and connected (FIG. 1). 5) and the like exist. The folded plate roof plate material 1 constituting the existing folded plate roof A and the folded plate roof plate material 5 constituting the repaired folded plate roof B both have the same structure.

Here, in order to distinguish each of the folded plate roofing materials constituting the existing folded plate roof A and the repaired folded plate roof B, the existing folded plate roof plate material constituting the existing folded plate roof A is simply referred to as the folded plate roof plate material. The folded plate roof plate material for repair or new construction constituting the repaired folded plate roof B is simply referred to as the folded plate roof plate material 5.

The existing folded plate roof A is constructed as a tightening type roof on an existing structural material 4 such as a purlin via an existing tight frame 2 and a hanger 3. Here, the longitudinal direction of the folded plate roof plate material 1 and the folded plate roof plate material 5 is referred to as the X direction, and the direction orthogonal to the longitudinal direction is referred to as the 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), and top portions 13 and 13 are formed from both ends of the compatible ascending side portions 12 and 12 from one end of the top portions 13 and 13. The lower ridge 14a is formed, and the upper ridge 14b is formed at the end of the other top 13 (see FIG. 1).

Further, in the folded plate roof plate material 5 constituting the repaired folded plate roof B, rising side portions 52 and 52 are formed from both side portions of the main plate 51 in the Y direction (width direction), and top portions from both ends of the compatible rising side portions 52 and 52. 53, 53 are formed, a lower roof portion 54a is formed from one end of the top portions 53, 53, and an upper roof portion 54b is formed at the end of the other top 53 [FIG. 1 (E), FIG. See 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 member 4. Then, the existing folded plate roof plate materials 1, 1 on the existing tight frames 2, 2, ...
... are arranged side by side. The lower plate portion 14a and the upper plate portion 14b of the adjacent folded plate roof plates 1 and 1 are fastened together with the hanger 3 and fixed on the existing tight frame 2. The existing folded plate roof A is configured with such a configuration [see FIG. 1 (A)]. The existing structural material 4 is a shaped steel, and H-shaped steel, I-shaped steel, channel steel, or the like is used.

The existing folded plate roof A of the polymerization type has trapezoidal half-mountain-shaped chevron portions 15 and 15 at both ends in the Y direction of the main plate 11 of the folded plate roof plate material 1. Then, the mountain-shaped portions 15, 15 of the adjacent folded-plate roof plate members 1, 1 are overlapped with each other to form the existing folded-plate roof A (see FIG. 5). In this case, the top of the existing tight frame 2 is formed to be flat, and the bolt shaft portion 23 is provided. Then, the peaks of the chevron portions 15 and 15 are overlapped with each other, and the bolt shaft portion 23 penetrates between the summit portions, and the nut is tightened and fixed to the bolt shaft portion 23.

Similarly, the folded plate roof plate material 5 in the repaired folded plate roof B also has chevron portions 55 and 55 on both sides in the Y direction. Then, the repaired folded plate roof B is constructed by superimposing the chevron portions 55 and 55 of the adjacent folded plate roof plate members 5 and 5 on each other (see FIG. 5). In this case, the top 73 of the existing tight frame 2 is formed to be flat, and the bolt shaft portion 74 is provided on the top 73. Then, the peaks of the chevron portions 55 and 55 are overlapped with each other, and the bolt shaft portion 74 penetrates between the summit portions, and the nut is tightened and fixed to the bolt shaft portion 74 [FIG. 5 (D). )reference〕.

Next, two steps, a dismantling process of the existing folded plate roof A and a construction process of the repaired folded plate roof B, will be described. To dismantle the existing folded plate roof A, first, the lower plate portion 14a and the upper plate portion 15b of the adjacent folded plate roof plate members 1 and 1 are separated [see FIGS. 1 (A) and 1 (B)]. At this time, the hanger 3 is also separated from the lower plate portion 14a or the upper plate portion 14b. A large number of existing tight frames 2, 2, ... Remain on the flange 41 of the existing structural member 4 [see FIG. 1 (C)].

The existing tight frame 2 is composed of two legs 21 and 21 and a top 22, and the top 22 and both legs 21 and 21 form 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. 1 (A) and 1 (B)]. The existing tight frame 2 may be a single unit, or a plurality of existing tight frames 2 may be continuous on the leg seat plate 21a.

At least a part of the existing tight frame 2 is cut, and together with the cutting, a process of lowering the existing tight frame 2 from the original height in the height direction is performed. The process of lowering the height in the height direction means deformation such as cutting the existing tight frame 2 and pushing the remaining portion of the existing tight frame 2 remaining on the existing structural material 4 onto the flange 41 of the existing structural material 4. By means, it means that the remaining portion is lowered in the height direction. There is one or more cuts to the existing tight frame 2.

The cutting machine 9 used for cutting is preferably a handheld type, small in size, and lightweight. The cutting operation (means) of the cutting machine 9 is shearing. As the cutting machine 9, a blade member that is movable with 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 a manual one. Here, it is preferable not to use a disc-shaped grindstone that rotates at high speed, a saw, a cutting tool that has high temperature, ignitability, and chip generation, such as fusing with gas, for cutting work from the viewpoint of fire prevention.

There are three embodiments in the cutting step of the existing tight frame 2 by the cutting machine 9. First, as the first embodiment of the cutting step, each of the legs 21 and 21 of the existing tight frame 2 is cut in the vicinity of the root portion with the existing structural member 4. That is, the vicinity of the lower end of the leg portion 21 is cut [see FIGS. 1 (B), 1 (C), 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 both leg portions 21 and 21. A gap S will be formed between the legs 21 and 21 left on the flange 41 of the existing structural member 4, and the gap S will be the mounting position of the repair tight frame B1 described later [FIG. 1 (Fig. 1). C) to (E), FIGS. 2 (B), (C)].

Further, both legs 21 and 21 of the existing tight frame 2 left on the flange 41 of the existing structural material 4 have only the lower portion remaining, which is considerably lower than the original height of the existing tight frame 2 and is high. The process of lowering in the longitudinal direction is completed with the cutting of both legs 21 and 21 [see FIG. 1 (C)]. 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 cutting is cutting at an upper position of both legs 21 and 21 of the existing tight frame 2 (see FIG. 3). The upper positions of the legs 21 and 21 are located away from the position of the flange 41 of the existing structural material 4, and the cutting machine 9 does not easily come into contact with the flange 41 of the existing structural material 4 and does not interfere with the cutting work. It has the advantage that cutting work is easy to perform [see FIG. 3 (A)].

Since the portions of both legs 21 and 21 of the existing tight frame 2 left on the flange 41 exist up to the vicinity thereof, the height direction can be adjusted by pushing both legs 21 and 21 slightly toward the other side and tilting them down. Lower it [see FIG. 3 (B)]. That is, the treatment of lowering the remaining portion is performed by slightly pushing down the both leg portions 21 and 21 left on the flange 41.

Here, between the legs 21 and 21 cut above each of the existing tight frames 2, the tilting angle is set so that the upper ends do not interfere with each other when pushed down, and between the legs 21 and 21. It is necessary to provide a gap so that the repair tight frame B1 can be installed. Further, it is preferable that both legs 21 and 21 are pushed down slightly so as to be close to the repaired tight frame B1 [see FIGS. 3 (B) and 3 (C)].

A third embodiment of cutting is cutting the top 22 of the existing tight frame 2 (see FIG. 6). In cutting the top portion 22, the entire legs 21 and 21 remain on the flange 41 of the existing structural member 4, and it is necessary to reduce the height. At this time, a part of the top portion 22 together with the both leg portions 21 and 21 remains at the upper ends of both leg portions 21 and 21 respectively. Therefore, the process of lowering the remaining portion of the existing tight frame 2 causes both legs 21 and 21 to be pushed down, and by this pushing down, the upper ends of both legs 21 and 21 or a part of the cut top 22 overlap each other. [See Fig. 6 (A)].

In this case, between the two leg portions 21, 21 of the existing tight frame 2, its height lower yield melt, both legs 21, 21 in a state overlapping each other. Therefore, it is difficult to install the repaired folded plate roof B between the legs 21 and 21. Therefore, the installation position of the repaired tight frame B1 is set between the adjacent existing tight frames 2 and 2 [see FIG. 6 (B)]. Further, the repaired tight frame B1 may be installed between the adjacent existing tight frames 2 and 2 even in cases other than the above cases (see FIG. 7).

When the cutting work of the existing tight frame 2 and the process of lowering the height direction are completed, the repaired tight frame B1 is installed on the flange 41 of the existing structural material 4 [see FIG. 1 (D)].
The repaired tight frame B1 will be described later, but the welding means is not adopted when mounting and installing the existing structural material 4. That is, the repaired tight frame B1 is a non-welding type. In the cutting of the existing tight frame 2 in the first and second embodiments, the repair tight frame B1 is located at the position of the gap S existing between the two leg portions 21 and 21 left on the flange 41.
To install.

At this time, it is preferable that the position of the hanger 3 mounted on the existing tight frame 2 before cutting and removal coincides with the position of the hanger 3 for repair mounted on the top 73 of the repair tight frame B1. Next, the folded plate roof plate material 5 for repair is arranged on the top 73 of the repair tight frame B1, and the lower plate roof plate material 5 is fastened to the upper plate portion 54a and the upper plate portion 54b via the hanger 3. , 5 are connected to each other, and this is repeated in sequence to construct the repaired folded plate roof B [see FIG. 1 (E)].

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

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

The receiving portion main body 7 is formed in a plate shape and a pillar shape, and is installed at a central position in the longitudinal direction (X direction) of the base plate 61 of the pedestal 6. The columnar portion 71 of the receiving portion main body 7 has a base portion 72 and a top portion 73. The columnar portion 71 rises vertically on the base plate 61. The shape of the top portion 73 is a stepped shape or a flat shape, and when the folding plate roof plate material 5 for repair of the tightening type is used, a hanger 3 is required, so the stepped shape is preferable. A bolt shaft portion 74 is attached to the top portion 73 as needed, and is used for attaching the hanger 3.

The locking member 8 is composed of a locking body 81 having a substantially U-shaped cross section and a tightening screw portion 82. The locking body 81 is a member obtained by forming a metal plate material into a substantially U-shaped cross section, and both ends of the flange portion 41 of the existing structural member 4 in the X direction can be inserted into the U-shaped locking member 3. There is. A tightening screw portion 82 is attached to the upper piece of the locking body 81, and the tightening screw portion 82 is composed of a screw shaft portion 82a and a nut 82b, and the nut 82b is screwed into the screw shaft portion 82a. It is configured to do.

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

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

A ... Existing folded plate shop, 1 ... Existing folded plate roof plate material, 21 ... Legs, 22 ... Top,
2 ... Existing tight frame, 4 ... Existing structural material, B ... Repaired folded plate roof,
B1 ... Repair tight frame, 5 ... Folded roof plate material for repair.

Claims (4)

An existing folded plate having 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 material supported by the existing tight frame. In the roof, the existing folded plate roof plate material is removed from the existing tight frame, both legs of the existing tight frame are cut, and the remaining portion of the existing tight frame is left on the existing structural material, and the existing structural material is left. between the remaining portion left on the flange of the leg portions, the gap is formed, housed so as to lower the height direction of the existing tight frame on the existing structural member, said on the existing structural member It is characterized in that a repaired tight frame that can be mounted by non-welding means is attached to the gap , and a folded plate roof plate material for repair is attached via the repaired tight frame to construct a repaired folded plate roof. Folded plate roof repair method. The folded plate roof according to claim 1, wherein both the legs of the existing tight frame are cut to remove the top portion, and a part of both legs is left on the existing structural material. Repair method. The folded plate roof repair method according to claim 1 or 2, wherein the cut portion of the existing tight frame is near the root of the leg portion with the existing structural material. In any one of claims 1 or 2, the cut portion of the existing tight frame is set near the upper end of the leg portion, and the leg portion facing the leg portion is tilted on the existing structural material after the leg portion is cut. The characteristic folded plate roof repair method.

Images