Methods for repairing eaves beams and repaired roofs

Abstract

Significantly shortens construction time and reduces costs, while preventing rainwater intrusion. [Solution] The process consists of a removal step to remove the old eaves beam connected to the end beam, and an installation step to connect the new eaves beam 6 between the remaining end beams. In the removal step, when the old eaves beam is removed, the beam support is removed from the old eaves beam but left on the end beam, the tight frame 11 is separated from the old eaves beam but left on the roofing material 3, and the old eaves beam is discarded. In the installation step, the new eaves beam 6 is inserted from below into the beam support left on the end beam, the new eaves beam 6 is fixed to the end beam, and the new eaves beam 6 is connected to the roofing material 3 via the tight frame 11 left on the roofing material 3. The roofing material 3, which is integrally fitted with the tight frame 11, is used as is without dismantling the crimped joints of the roofing material 3.

Description

Technical Field

[0001] The present invention relates to a method for renovating eaves beams and a renovated roof.

Background Art

[0002] A roof is supported by pillars via beams to constitute a building. The eaves beams located at the outermost side of the beams are at the forefront of the external environment, so they are easily damaged by rain, snow and the like, and are more prone to change over time compared to beams in other parts.

[0003] When eaves beams deteriorate or get damaged, there is a risk of deterioration and damage to other components and collapse of the eaves, so repair is required. Conventionally, to replace an eaves beam, construction could not be performed without removing the roof located above it. However, this required a very long construction period and enormous cost. In particular, when eaves beams for heavy snowfall areas deteriorate or get damaged, all deteriorated and damaged beams must be replaced with conventional methods, and even if only some beams are deteriorated or damaged, most of the roofing materials must be re-roofed, and the method for restoring and fixing roofing materials when replacing such beams has been a problem.

[0004] That is, conventionally, when replacing a damaged eaves beam, it was impossible to replace only the damaged part of the eaves beam, and most of the roofing materials had to be removed and re-roofed. In such cases, the construction period lasted a long time, and residents could not live in the residence during that period. For this reason, in apartment buildings and the like, the cost of relocating tenants is enormous, the construction cost is huge, and furthermore, the cost of industrial waste disposal is also large. For example, in the case of an apartment with 9-span eaves beams, conventionally, the construction period takes 3 to 4 months, the cost is about 7.5 million yen, and additionally, the relocation cost for tenants is incurred.

[0005] For a heavy snowfall roof formed by caulking and joining folded plates of two members, once disassembled, it was substantially impossible to restore the roof to its original state because the roofing materials are caulked and joined. This is because if the caulked joint is disassembled and then caulked and joined again, the joint will be incomplete, so rainwater, melted snow water and the like will intrude through gaps and cause water leakage. For this reason, conventionally, almost all roofing materials had to be re-roofed.

[0006] Therefore, in the past, as mentioned above, in addition to the issues of construction period and cost, the disposal of industrial waste and the costs of relocating tenants were also required, resulting in significant costs and construction time. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Utility Model Publication No. 61-110721 [Overview of the project] [Problems that the invention aims to solve]

[0008] The present invention was conceived in view of the above-mentioned background, and its purpose is to significantly shorten the construction period and significantly reduce costs. Furthermore, it aims to avoid any disadvantages arising from the resolution of these problems, that is, to maintain the roof's function of preventing the intrusion of rainwater, etc., as before. [Means for solving the problem]

[0009] To solve the above problems, the present invention provides a method for repairing eaves beams, which is a method for supporting a roof by connecting eaves beams between end beams, comprising a removal step of removing the old eaves beams connected to the end beams, and an installation step of connecting new eaves beams between the remaining end beams, wherein the removal step comprises the step of removing the beam support from the old eaves beam but leaving it on the end beam when removing the old eaves beam, the step of separating the tight frame from the old eaves beam but leaving it on the roofing material when removing the old eaves beam, and the step of discarding the old eaves beam, and the installation step comprises the step of inserting the new eaves beam from below into the beam support left on the end beam and inserting the new eaves beam into the end beam, and the step of connecting the new eaves beam to the roofing material via the tight frame left on the roofing material, and the step of supporting the roofing material with the new eaves beam. Furthermore, the method for repairing the eaves beam described in claim 2 is characterized in that, in the method for repairing the eaves beam described in claim 1, the roofing material consists of two folded plates that are integrally crimped and joined together, and is left in place. Furthermore, the method for repairing the eaves beam described in claim 3 is characterized in that, in the method for repairing the eaves beam described in claim 1 or claim 2, when the old eaves beam is removed, the tight frame is separated from the old eaves beam but remains attached to the roofing material, and is left separated from the old eaves beam. Furthermore, the method for repairing the eaves beam described in claim 4 is characterized in that, in the method for repairing the eaves beam described in claim 3, the roofing material and the tight frame are fixed to the new eaves beam using double waterproofing screws, from the upper surface of the ridge of the roofing material through the ridge of the tight frame to the new eaves beam. Furthermore, the method for repairing the eaves beam described in claim 5 is characterized in that, in the method for repairing the eaves beam described in claim 1, the remaining tight frame and roofing material are connected in the longitudinal direction of the new eaves beam. Furthermore, the method for repairing the eaves beam described in claim 6 is characterized in that, in the method for repairing the eaves beam described in claim 5, the roofing material is laid in a direction perpendicular to the new eaves beam, and covers the entire tight frame, including the peaks and valleys. Furthermore, the method for repairing an eaves beam according to claim 7 is characterized in that, in the method for repairing an eaves beam according to claim 1, the connecting portion of the beam support that is left protruding from the outside of the gable beam is connected to the connecting portion of the new eaves beam that has been jointed in the longitudinal direction. Furthermore, the method for repairing an eaves beam according to claim 8 is characterized in that, in the method for repairing an eaves beam according to claim 1, the slope member is removed together with the old eaves beam in the step of removing the old eaves beam, and the slope member is installed together with the new eaves beam in the step of installing the new eaves beam. Furthermore, the method for repairing eaves beams according to claim 9 is characterized in that, in the method for repairing eaves beams according to claim 1, all damaged eaves beams are replaced with new eaves beams. Furthermore, the method for repairing eaves beams according to claim 10 is characterized in that, in the method for repairing eaves beams according to claim 1, only a portion of the damaged eaves beams are replaced with new eaves beams. Furthermore, the refurbished roof according to the present invention is a roof supported by connecting eaves beams between gable beams, and is characterized in that it consists of remaining gable beams, beam supports remaining on the gable beams, new eaves beams inserted from below into the connecting pieces of the beam supports and attached in a direction perpendicular to the gable beams, and metal roofing material remaining with tight frames fitted into it, and the new eaves beams are connected to the roofing material via the tight frames and support the roof. Furthermore, the refurbished roof according to claim 12 is characterized in that, in the refurbished roof according to claim 11, the roofing material is made up of two corrugated sheets that are integrally crimped and joined together. Furthermore, the refurbished roof according to claim 13 is characterized in that, in the refurbished roof according to claim 11 or claim 12, the new eaves beam is connected by inserting double waterproofing screws from the upper surface of the peak of the roofing material through the peak of the tight frame to the new eaves beam, thereby supporting the roofing material. Furthermore, the refurbished roof according to claim 14 is characterized in that, in the refurbished roof according to claim 11, the tight frame and roofing material are connected in the longitudinal direction of the new eaves beam. Furthermore, the refurbished roof according to claim 15 is characterized in that, in the refurbished roof according to claim 14, the roofing material is laid in a direction perpendicular to the new eaves beam and covers all of the tight frame, including the peaks and valleys. Furthermore, the repaired roof according to claim 16 is characterized in that, in the method for repairing eaves beams according to claim 1, all damaged eaves beams are replaced with new eaves beams. Furthermore, the repaired roof according to claim 17 is characterized in that, in the method for repairing the eaves beams according to claim 1, only the damaged portion of the eaves beams consists of new eaves beams. [Effects of the Invention]

[0010] Roofing materials made by crimping together two corrugated metal members are practically impossible to restore to their original state once dismantled. However, according to the present invention, the new eaves beam is inserted from below into the beam support left on the end beam, and the new eaves beam is attached to the end beam. Therefore, the existing roofing material, which is integrally fitted with the tight frame, is used as is without dismantling the crimped joint, thus eliminating the risk of water leakage. Roofing materials made by crimping together two corrugated metal members are widely used in heavy snowfall areas, and since snow melts over long periods, posing a risk of water leakage, this effect is particularly effective in heavy snowfall areas.

[0011] Furthermore, according to the present invention, since the existing roofing material, which is integrally fitted with the tight frame, is used as is, the construction period is significantly shortened and costs are reduced. [Brief explanation of the drawing]

[0012] [Figure 1] (A) is a front view showing the roof before repair, which is one embodiment of the method for repairing eaves beams according to the present invention; (B) is a plan view of the entire (A); and (C) is an enlarged view of part C of (B) with a portion omitted. [Figure 2] (A) is an enlarged view of part II of Figure 1(C) showing a removal process according to one embodiment of the method for repairing eaves beams according to the present invention, (B) is a perspective view of (A), and (C) is a partially omitted perspective view of (B). [Figure 3] (A) is a diagram showing a removal process according to one embodiment of the method for repairing eaves beams according to the present invention, (B) is a perspective view of part B of (A), (C) is a partially omitted perspective view of (B), and (D) is a front view of part D of (C). [Figure 4] This figure shows the removal process according to one embodiment of the method for repairing eaves beams according to the present invention, and is an enlarged view of the arrow pointing to section IV in Figure 1(A). [Figure 5] This figure shows a removal process according to one embodiment of the method for repairing eaves beams according to the present invention, and is a partially enlarged view of the portion corresponding to section V in Figure 4. [Figure 6]Fig. (A) is a diagram illustrating an installation step according to an embodiment of a method for repairing an eaves beam according to the present invention, wherein (A) is a plan view showing a state where a beam receiver is left on a gable beam, (B) is a perspective view of (A), and (C) is a perspective view showing a new eaves beam in a state where the beam receiver of (A) is omitted. [Figure 7] Fig. (A) is a diagram illustrating an installation step according to an embodiment of a method for repairing an eaves beam according to the present invention, wherein (A) is a front view of a repaired roof, (B) is an overall plan view of (A), and (C) is an enlarged view of part C in (B). [Figure 8] Fig. (A) is a diagram illustrating an installation step according to an embodiment of a method for repairing an eaves beam according to the present invention, wherein (A) is an enlarged view viewed along arrows of part VIII in Fig. 7(A), and (B) is an enlarged view of part B in (A). [Figure 9] (A) is a front view of a beam receiver used in the installation step of Fig. 4, (B) is a rear view of (A), (C) is a plan view of (A), and (D) is a left side view of (A). BEST MODE FOR CARRYING OUT THE INVENTION

[0013] Next, the method for repairing an eaves beam and the repaired roof according to the present invention will be described in more detail based on the drawings showing an embodiment. For convenience, portions having the same function are denoted by the same reference numerals, and descriptions thereof are omitted.

[0014] Figure 1 shows the configuration of a roof 1 designed for heavy snowfall. Specifically, the roof 1 consists of a roofing material 3 formed by crimping together folded plates 3a and 3b as shown in Figure 5, and many of these roofing materials 3 are connected together and laid in the direction indicated by the arrows in Figure 1. The roofing material 3 is made of hot-dip galvanized steel sheet. 5 is an eave beam, which is connected between a beam support 9 (shown in Figure 2) fixed to the gable beam 7 and a beam support 9 (omitted in Figure 2) on an adjacent gable beam 7 (shown in Figure 1(C)), and supports the roof 1. As shown in Figure 3, three roofing supports made of electroplated steel sheet called tight frames 11 are connected and fixed to the eave beam 5 along its longitudinal direction by coarse thread screws 13. 8 is a beam member, and 12 is a beam support provided on the beam member 8 and the girder beam 19. The configuration of the beam support 12 is the same as that of the beam support 9, and it is bolted to the column member 17 and the girder beam 19 by bolts 10a. The end beam 7 is fixed to the column 17.

[0015] As shown in Figure 9, the beam support 9 consists of a base 9a and a connecting piece 9b. A pair of connecting pieces 9b are provided on the outside of the base 9a at intervals. Each connecting piece 9b has a pin hole 9c at its tip and constricted portion. The base 9a has two bolt holes 9d for bolt connection. As shown in Figure 2, the beam support 9 is bolted to the end beam 7 by bolts 10 at the base 9a, and is also connected to the eaves beam 5 by driving drift pins 9e made of mild steel wire into the pin holes 9c of the connecting piece 9b.

[0016] Figure 1 shows a portion of the roof 1 before demolition, which has the above configuration. In Figures 1(B) and (C), the roofing material 3 is omitted for convenience. In the following explanation, since we will be describing the case where the eaves beam is damaged, 5 will represent the old eaves beam. The removal process of the old eaves beam 5 and the installation process of the new eaves beam 6 are as follows.

[0017] The process for removing the old eaves beam 5 begins by removing the drift pins 9e from the beam supports 9 that are fixed to the connecting parts 5a at both ends of the old eaves beam 5 (Figure 2). Up to this stage, the tight frame 11 is fixed to the removed old eaves beam 5, as shown in Figure 4.

[0018] Since the drift pins 9e are attached in two places to each beam support 9, remove all of them (Figure 2(C)). The removed drift pins 9e are left in place for reuse (Figure 2(A)) and stored.

[0019] Next, as shown in Figure 3, the coarse thread screws 13 that secure the tight frame 11 to the old eaves beam 5 are cut off (Figure 3(D)). This separates the old eaves beam 5 from the roofing material 3 and the tight frame 11. The separated old eaves beam 5 is then moved downwards and removed from the roofing material 3 and the tight frame 11 (see Figures 2(B) and 3(C)). The old eaves beam 5 is removed, and the tight frame 11, which is integrally connected to the roofing material 3, is left in place along with the roofing material 3. Note that the roofing material 3 is omitted in Figure 3 for convenience.

[0020] The beam support 9 is bolted to the end beam 7 by bolts 10 and remains fixed to the end beam 7 (Figure 2(A)). Since the beam support 9 of the old eaves beam 5 is fixed to the end beam 7 and the drift pin 9e has been removed, the connecting part 5a is carefully removed from the beam support 9.

[0021] The cut-off coarse thread screws 13 will be discarded. The tight frame 11 separated from the old eaves beam 5 will be left in place for reuse. The damaged old eaves beam 5 will be discarded.

[0022] Meanwhile, the tight frame 11, which was removed from the old eaves beam 5, remains attached to the roofing material 3, which is formed by the integral crimping and joining of corrugated sheets 3a and 3b, as shown in Figure 5. This completes the removal process.

[0023] Next, the process moves on to installing the new eaves beam 6. First, the new eaves beam 6 is fixed to the gable beam 7, and the remaining tight frame 11 and roofing material 3 are fixed to the new eaves beam 6 (Figure 6).

[0024] Since the beam support 9 is fixed in place on the end beam 7 (Figure 6(A)), the new eaves beam 6 is inserted into this fixed beam support 9 from below, as indicated by the dashed line (Figure 6(B)). This insertion is done by inserting the connecting piece 9b of the fixed beam support 9, shown in Figure 9, into the insertion opening 6b, which is formed by a joint processing along the longitudinal direction in the connecting portion 6a opened at the tip of the new eaves beam 6. Connecting holes 6c for drift pins are also opened in the connecting portions 6a formed at both ends of the new eaves beam 6, and drift pins 9e are driven into these connecting holes 6c to fix the new eaves beam 6 between the end beam 7 and the adjacent end beam 7 (Figure 6(C)).

[0025] Next, as shown in Figures 7 and 8, the new eaves beam 6 is fixed to the gable beam 7. First, holes for screw fastening (not shown) are made in the crest portion 3c of the roofing material 3 and the crest portion 11a of the tight frame 11, which are remaining members that are crimped together with the roofing material 3, hangers (not shown), and tight frame 11. Double waterproofing screws 15 are inserted through these holes and fixed from the roofing material 3 through the tight frame 11 to the new eaves beam 6 with the double waterproofing screws 15 (Figure 8).

[0026] As shown in Figure 8(B), the double waterproofing screw 15 has a double waterproofing structure in which a packing 15a is attached to the lower part of the screw head and a packing 15b is also attached to the lower skirt portion, resulting in high watertightness and eliminating the need for caulking of the screw head.

[0027] In the illustrated example of a renovation project on nine spans of eaves beams, the construction period was reduced from approximately 3-4 months to 1.5 months, less than half the original time, and the construction cost was significantly reduced from approximately 7.5 million yen to approximately 3.63 million yen, a 48% reduction compared to the original cost. When tenant move-out costs are also included, the economic benefits become remarkably large.

[0028] According to the above embodiment, when the old eaves beam 5 is removed, the beam support 9 is removed from the old eaves beam 5 but remains on the end beam 7 and is exposed. Also, the tight frame 11 is separated from the old eaves beam 5 but remains attached to the roofing material 3. In this state, the new eaves beam 6 is connected between the end beams 7, and at this time, the new eaves beam 6 is inserted from below into the beam support 9 that remains on the end beam 7, making it possible to replace the new eaves beam 6 without removing the roofing material 3.

[0029] This means the existing roof can be used as is, eliminating the risk of leaks.

[0030] Furthermore, since there is no need to dismantle and re-roof roof 1, construction costs, construction period, and even tenant relocation fees can be reduced. In addition, the cost of removing industrial waste generated by dismantling the roofing materials can also be reduced.

[0031] Figures 7 and 8 also show the renovated roof constructed using the renovation method described above. Hereafter, 1 will refer to the renovated roof. That is, as detailed based on Figures 6 to 8, the new eaves beam 6 is connected to the remaining beam support 9 between the gable beams 7. The new eaves beam 6 is inserted from below into the connecting piece 9b of the beam support 9 and is installed in a direction perpendicular to the gable beams 7. The tight frame 11 remains attached to the roofing material 3, and the new eaves beam 6 supports the roof together with the roofing material 3 to which the tight frame 11 is integrally connected. As shown in Figure 9, the beam support 9 consists of a base 9a and a connecting piece 9b. A pair of connecting pieces 9b are provided on the outside of the base 9a at intervals. Pin holes 9c are provided at the tip and the constricted part of the connecting piece 9b. Bolt holes 9d for bolt connection are provided in the base 9a. The beam support 9 is bolted to the gable beam 7 at its base 9a by bolts 10, and is also connected to the connecting piece 9b inserted into the connecting portion 6a of the new eaves beam 6 by driving in a drift pin 9e made of mild steel wire. The roofing material 3 is laid in a direction perpendicular to the new eaves beam 6, covering the entire tight frame 11, including the peaks 11a and valleys 11b.

[0032] The present invention is not limited to the above-described embodiment. For example, if a slope member or height adjustment member is provided on the eaves beam, in the step of removing the old eaves beam 5, the slope member or height adjustment member is removed together with the old eaves beam 5, and in the step of installing the new eaves beam 6, the slope member or height adjustment member is installed together with the new eaves beam 6. In this case, the slope member or height adjustment member used in each step is a slope member or adjustment member with the same height and inclination as before removal.

[0033] The present invention can be applied not only to roofs with heavy snowfall specifications but also to roofs with normal roofing materials. Furthermore, the shape and material of the roofing material are not limited to those of the above-described embodiment. In addition, the material of the beam support 9 and tight frame 11 is not limited. Furthermore, the shape of the beam support 9 and tight frame 11 is not limited to those of the above-described embodiment. The number of connected tight frames 11 is not limited to three, and the number can be set appropriately according to the longitudinal length of the new and old eaves beams.

[0034] The above embodiment described a case in which all damaged eaves beams are replaced with new eaves beams 6. However, the repair method and repaired roof according to the present invention can also be used to replace only some of the damaged eaves beams with new eaves beams 6. This prevents the spread of decay fungi and has great advantages in terms of building maintenance, construction time, and cost. [Industrial applicability]

[0035] The present invention will be utilized in the field of building construction, particularly roof renovation. [Explanation of symbols]

[0036] 1. Roof 3. Roofing materials 3a corrugated sheet 3b folded plate 3c Yamabe 5 Old eaves beam 5a Connecting part 6 New eave beam 6a Connecting part 6b Outlet 6c connection hole 7 Tsumari 8 Beam material 9 Beam bracket 9a base 9b Connecting piece 9c pinhole 9d Bolt hole 9e Drift Pin 10 volts 10a bolt 11 Tight Frame 11a Yamabe 11b Tanibe 12 Beam bracket 13 Coarse thread 15 Double waterproofing screws 17 Pillar material 19 girder beam

Claims

1. This method involves connecting eaves beams between gable beams to support the roof, This process consists of a removal step, where the old eaves beam connected to the end beam is removed, and an installation step, where the new eaves beam is connected between the remaining end beams. The removal process involves removing the old eaves beam, where the beam support is removed from the old eaves beam but left in place on the end beam. When removing the old eaves beam, the tight frame is separated from the old eaves beam but remains attached to the roofing material. This process involves discarding the old eaves beams. The installation process involves inserting the new eaves beam from below into the beam support remaining on the gable beam, and then inserting the new eaves beam into the gable beam. A method for repairing eaves beams, characterized by comprising the steps of connecting a new eaves beam to the roofing material via a tight frame left in place on the roofing material, and supporting the roofing material on the new eaves beam.

2. A method for repairing an eaves beam according to claim 1, characterized in that the roofing material consists of two corrugated sheets that are integrally crimped and joined together, and is left in place.

3. A method for repairing an eaves beam according to claim 1 or claim 2, characterized in that when the old eaves beam is removed, the tight frame is separated from the old eaves beam but remains attached to the roofing material, and is left separated from the old eaves beam.

4. A method for repairing an eaves beam according to claim 3, characterized in that the roofing material and the tight frame are fixed to the new eaves beam using double waterproofing screws from the upper surface of the ridge of the roofing material through the ridge of the tight frame to the new eaves beam.

5. A method for repairing an eaves beam according to claim 1, characterized in that the remaining tight frame and roofing material are connected in the longitudinal direction of the new eaves beam.

6. A method for repairing an eaves beam according to claim 5, characterized in that the roofing material is laid in a direction perpendicular to the new eaves beam and covers the entire tight frame, including the peaks and valleys.

7. A method for repairing an eaves beam according to claim 1, characterized in that the connecting portion of the beam support that is left protruding from the outside of the end beam is connected to the connecting portion of the new eaves beam which has been jointed in the longitudinal direction.

8. A method for repairing an eaves beam according to claim 1, characterized in that in the step of removing the old eaves beam, the slope member is removed together with the old eaves beam, and in the step of installing the new eaves beam, the slope member is installed together with the new eaves beam.

9. A method for repairing eaves beams according to claim 1, characterized in that all damaged eaves beams are replaced with new eaves beams.

10. A method for repairing eaves beams according to claim 1, characterized in that only a portion of the damaged eaves beams are replaced with new eaves beams.

11. A roof supported by connecting and supporting eaves beams between gable beams, The remaining gable beam, The beam support left on the end beam, A new eaves beam is inserted from below into the connecting piece of the beam support and attached in a direction perpendicular to the end beam, It consists of metal roofing material with the tight frame still fitted in place. A refurbished roof characterized in that a new eaves beam is connected to the roofing material via the tight frame described above to support the roof.

12. A refurbished roof according to claim 11, characterized in that the roofing material is made up of two corrugated sheets that are integrally crimped and joined together.

13. A refurbished roof according to claim 11 or claim 12, characterized in that the new eaves beam is connected by inserting double waterproofing screws from the upper surface of the peak of the roofing material through the peak of the tight frame to the new eaves beam, thereby supporting the roofing material.

14. A refurbished roof according to claim 11, characterized in that the tight frame and roofing material are connected in the longitudinal direction of the new eaves beam.

15. The refurbished roof according to claim 14, characterized in that the roofing material is laid in a direction perpendicular to the new eaves beam and covers all of the tight frame, including the peaks and valleys.

16. A method for repairing eaves beams according to claim 1, characterized in that all damaged eaves beams are replaced with new eaves beams.

17. A method for repairing eaves beams according to claim 1, characterized in that only a portion of the damaged eaves beams are replaced with new eaves beams.

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