Roof part maintenance method

Abstract

To provide a roof part maintenance method capable of appropriately performing roof part maintenance, reducing the burden on a user, and being widely applicable to buildings with solar panels.SOLUTION: A frame 30 is provided in a roof part 11 including a deck roof, and a solar panel 12 is installed in the frame 30. A maintenance method for the roof part 11 comprises: an installation step of installing a lifting device 40 on the roof part 11; a raising step of raising the frame 30 with respect to the roof part 11 by the lifting device 40 in a state where the solar panel 12 and the frame 30 are integrated; a bundle assembling step of assembling a raising bundle 50 between the roof part 11 and the frame 30 in a state where the frame 30 is lifted by the lifting device 40; and a maintenance step of maintaining the roof part 11 in a state where the frame 30 is raised by the raising bundle 50.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a method for maintaining a roof suitable for performing maintenance on a roof where a solar panel is installed.

Background Art

[0002] In a building, it is desirable to perform regular maintenance on a roof composed of a flat roof. Further, when a solar panel is installed on the roof, when performing, for example, repair work on a waterproof sheet as roof maintenance, it is conceivable that the solar panel may interfere with the sheet repair work. Therefore, conventionally, in order to facilitate maintenance work on the roof, a technique has been proposed in which a panel moving mechanism is provided in advance in a solar power generation facility, and the solar panel is moved by the panel moving mechanism (see, for example, Patent Documents 1 and 2). As a configuration of the panel moving mechanism, a configuration in which the solar panel is slid along a rail portion or a configuration in which a shaft portion is provided on the solar panel and the solar panel is rotated around the shaft portion can be considered.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above-described prior art, when installing the solar panel on the roof (for example, when constructing a new building), it is necessary to equip the solar power generation facility with a panel moving mechanism. However, the cycle for repairing the waterproof sheet, for example, on the roof is about 10 to 20 years. Considering the frequency of maintenance, the merit of installing the panel moving mechanism at a high cost is considered to be small. That is, in the existing technology, the burden on the user is large, and there is room for improvement for wide application.

[0005] The present invention has been made in view of the above circumstances, and the main object is to realize a roof maintenance method that enables proper maintenance of the roof, reduces the burden on the user, and can be widely applied to buildings with solar panels.

Means for Solving the Problems

[0006] To solve the above problems, the roof maintenance method in the first invention is applied to a building in which a gantry is provided on a roof composed of a pitched roof, and a solar panel is installed on the gantry, an installation step of installing a lifting device on the roof, a lifting step of lifting the gantry with respect to the roof by the lifting device while the solar panel and the gantry are integrated, a bundling assembly step of assembling a bundling member for raising between the roof and the gantry in a state where the gantry is lifted by the lifting device, a maintenance step of performing maintenance on the roof in a state where the gantry is raised by the bundling member, and is characterized by including the above.

[0007] According to the above maintenance method, when performing maintenance on the roof part, a lifting device is installed on the roof part composed of a gabled roof. With the solar panel and the pedestal integrated, the pedestal is lifted with respect to the roof part by the lifting device. In the lifted state, a spacer member for raising is assembled between the roof part and the pedestal. Then, maintenance of the roof part is performed with the pedestal raised by the spacer member. In this case, by using the lifting device to raise the pedestal and further maintaining the raised state of the pedestal by assembling the spacer member, a working space for the maintenance worker to perform maintenance work is expanded below the solar panel. As a result, the maintenance of the roof part can be suitably carried out without removing the solar panel from the pedestal. In addition, the configuration in which the solar panel is installed on the pedestal in a building with a solar panel is a general-purpose configuration that is widely implemented. In this case, the method of lifting the solar panel and the pedestal by the lifting device and the spacer member has a wide application range including existing solar panels. Furthermore, according to this method, for example, when constructing a building, it is not necessary to provide a panel moving mechanism in anticipation of maintenance several years later. As a result, the maintenance method of the roof part in the present invention enables proper maintenance of the roof part, reduces the burden on the user, and can be widely applied to buildings with solar panels.

[0008] In the second invention, the pedestal has a plurality of cross members extending along the upper surface of the roof part, and the solar panels are arranged side by side in the extending direction of the cross members. In the lifting step, the lifting device is arranged between the solar panels in the extending direction of the cross members, and by lifting the cross members with the lifting device, the solar panels on both sides of the lifting device in the extending direction are lifted together with the pedestal. In the bundling assembly step, with the pedestal lifted by the lifting device, the spacer member is assembled to the cross members.

[0009] Solar panels are arranged side by side in the extending direction of a plurality of crossbars on a pedestal. In such a configuration, a lifting device is arranged between the solar panels, and the crossbars are lifted by the lifting device. In this case, while taking into account the weight balance of each solar panel arranged in the extending direction of the crossbar, the solar panel and the pedestal can be properly lifted by the lifting device. Further, the operation of lifting a plurality of solar panels together with the pedestal can be efficiently performed, and thus the maintenance work efficiency can be improved.

[0010] In the third invention, a gap is provided between the solar panels in the extending direction of the crossbar, and the lifting device has a height dimension larger than that of the solar panel before lifting and can be arranged in the gap. The lifting device is a lifting device that lifts the crossbar by a lifting member. In the ascending step, the pedestal is lifted with respect to the roof portion by performing a lifting operation by the lifting devices installed at a plurality of locations spaced apart from each other.

[0011] In a configuration in which solar panels are arranged side by side in the extending direction of a plurality of crossbars, a lifting device is arranged using a gap provided between each solar panel in the extending direction, and the crossbar is lifted by the lifting device. In this case, since the lifting device has a height dimension larger than that of the solar panel before lifting and is arranged in the gap, an operator performing the lifting operation can enter the gap between the solar panels and perform the operation of lifting the solar panel in a standing posture. Therefore, it is not necessary to bend down under the solar panel before lifting and perform the operation of lifting the solar panel, and the workability is good.

[0012] In the fourth invention, an anchor member fixed to a roof base material is provided on the roof portion, and in the bundling step, the bundling member is fixed to the anchor member when the bundling member is assembled in a state where the pedestal is lifted by the lifting device.

[0013] In the bundling attachment step, the bundling member was fixed to the anchor member on the roof side. As a result, in a state where the solar panel and the gantry are lifted by the bundling member, the stability of the solar panel and the gantry can be enhanced.

[0014] In the fifth invention, as maintenance of the roof part, it is a maintenance method of performing repair of roof waterproofing on the upper surface of the roof part. A cable for outputting the electric power generated by the solar panel is connected to the solar panel, and the solar panel is connected to the electrical equipment on the building side via the cable. In the maintenance step, with the gantry lifted by the bundling member, the cable is floated from the roof part in a state of being along the gantry, and the repair work of the roof waterproofing is performed while continuing the power generation by the solar panel.

[0015] When repairing the roof waterproofing, there is a concern that if the cable extending from the solar panel is placed on the roof surface, it may interfere with the repair work of the roof waterproofing. In this regard, by floating the cable extending from the solar panel from the roof part in a state of being along the gantry, it is possible to suppress the cable from interfering with the repair work of the roof waterproofing. Also, since the cable does not interfere with the repair work of the roof waterproofing and the solar panel remains installed on the gantry, it is possible to perform the repair work of the roof waterproofing while continuing the power generation by the solar panel.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0017] Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In this embodiment, in a building where solar panels are installed on the roof, repair work for repairing a waterproof sheet laid on the roof will be described. FIG. 1 is a perspective view showing a building 10.

[0018] As shown in FIG. 1, the building 10 has a roof portion 11 composed of a flat roof extending in a substantially horizontal direction, and a solar power generation device 13 having a plurality of solar panels 12 is installed on the roof portion 11. A plurality of rows of solar panels 12 are installed on the roof portion 11, and a plurality of solar panels 12 are provided side by side in each row. Each solar panel 12 is inclined at a predetermined angle with respect to the horizontal direction, and all are installed so that the light receiving surface faces a predetermined direction (for example, south).

[0019] FIG. 2 is a side view showing the installation structure of the solar panel 12 on the roof portion 11. As shown in FIG. 2, the roof portion 11 has roof purlins 21 as a roof base material and a field board 22 placed on the roof purlins 21. A roof insulation material 23 made of glass wool, polyurethane, or the like is placed on the field board 22. A waterproof sheet 24 made of a material having water resistance such as vinyl chloride is laid on the roof insulation material 23. The waterproof sheet 24 is, for example, a long sheet material, and the roof portion 11 is provided with a full-surface sheet waterproofing by laying a plurality of waterproof sheets 24.

[0020] A plurality of waterproof anchors 25 as anchor members are provided at multiple locations on the roof portion 11, and a pedestal 30 for a solar panel is fixed to the waterproof anchor 25. The waterproof anchor 25 has an anchor bolt 26 extending in the vertical direction and is provided in a state of being fixed to the roof purlin 21. The anchor bolt 26 protrudes above the waterproof sheet 24 in the roof portion 11, and a fixing fitting 27 for fixing the pedestal 30 is attached to the anchor bolt 26.

[0021] Next, the pedestal 30 will be described. FIG. 3 is a perspective view showing the configuration of the pedestal 30. The pedestal 30 has a pair of lower bars 31 that are horizontally spaced apart from each other and extend along the upper surface of the roof portion 11, and a plurality of upper bars 32 that extend in a direction orthogonal to the lower bars 31 and are arranged to connect the pair of lower bars 31. The pair of lower bars 31 are arranged parallel to each other and are fixed to the waterproof anchor 25 on the roof portion 11 by a fixing fitting 27 as a bar fixing member. Two upper bars 32 are arranged for each solar panel 12 in the extending direction of the lower bar 31. The upper bars 32 are fixed to the lower bars 31 by fixing fittings 33 in a state of being parallel to each other. The lower bars 31 and the upper bars 32 are hollow square bars made of a metal such as aluminum, for example. In the following description, the fixing fitting 27 for fixing the lower bar 31 is also referred to as the lower bar fixing fitting 27, and the fixing fitting 33 for fixing the upper bar 32 is also referred to as the upper bar fixing fitting 33.

[0022] The upper bar fixing fitting 33 has a height variable function that makes the vertical separation distance (i.e., the height position of the upper bar 32) between the upper bar 32 and the lower bar 31 variable. In this case, two upper bar fixing positions are determined for each solar panel 12 arranged in the extending direction of the lower bar 31, and by making the height positions of the upper bar 32 different in the upper bar fixing fittings 33 provided at these respective upper bar fixing positions, the solar panel 12 is installed on the pedestal 30 in an inclined state.

[0023] FIG. 4 is a perspective view showing the configuration of each fixing fitting 27, 33, and FIG. 5 is a perspective view showing the fixing structure of the lower bar 31 and the upper bar 32 by the fixing fittings 27, 33.

[0024] As shown in FIG. 4(a), the lower crossbar fixing fitting 27 has a pair of opposing plate portions 27a facing each other and a bottom portion 27b connecting the pair of opposing plate portions 27a. The lower crossbar fixing fitting 27 is fixed to the roof portion 11 by connecting the bottom portion 27b to the waterproof anchor 25. Two through holes 27c are formed in each of the opposing plate portions 27a in the left - right direction of the figure, that is, in the horizontal direction in the fixed state with respect to the roof portion 11.

[0025] Also, as shown in FIG. 4(b), the upper crossbar fixing fitting 33 has a pair of opposing plate portions 33a facing each other and a bottom portion 33b connecting the pair of opposing plate portions 33a. The upper crossbar fixing fitting 33 is fixed to the lower crossbar 31 at the bottom portion 33b. Two through holes 33c are formed in each of the opposing plate portions 33a in the up - down direction of the figure, that is, in the vertical direction in the fixed state with respect to the lower crossbar 31.

[0026] As shown in FIG. 5, the lower crossbar 31 is inserted between the pair of opposing plate portions 27a of the lower crossbar fixing fitting 27 fixed to the roof portion 11, and in this state, it is fixed to the lower crossbar fixing fitting 27 by bolt fastening or the like to the through holes 27c.

[0027] Also, the upper crossbar 32 is inserted between the pair of opposing plate portions 33a of the upper crossbar fixing fitting 33 fixed to the lower crossbar 31, and in this state, it is fixed to the upper crossbar fixing fitting 33 by bolt fastening or the like to the through holes 33c. Here, in the upper crossbar fixing fitting 33, the height position of the upper crossbar 32 with respect to the lower crossbar 31 is variable depending on which of the two upper and lower through holes 33c is used for bolt fastening.

[0028] In this case, in the upper rail fixing fitting 33 on the left side of the figure, bolt fastening is performed on the fixed portion 31a of the lower rail 31 using the lower through hole 33c among the upper and lower two through holes 33c. In this state, the height position of the upper rail 32 relative to the lower rail 31 is relatively low. On the other hand, in the upper rail fixing fitting 33 on the right side of the figure, bolt fastening is performed on the fixed portion 32a of the upper rail 32 using the upper through hole 33c. In this state, the height position of the upper rail 32 relative to the lower rail 31 is relatively high. As a result, the height positions of the two upper rails 32 are different in the extending direction of the lower rail 31, and the solar panel 12 is installed in a state inclined at a predetermined angle.

[0029] FIG. 6(a) is a plan view showing the installation state of a plurality of solar panels 12 in the solar power generation device 13, and FIG. 6(b) is a side view of the roof portion 11 in the installation state of the solar panel 12.

[0030] In the solar power generation device 13, when a plurality of solar panels 12 arranged side by side in the left - right direction in FIG. 6(a) are used as a solar panel group, a plurality of rows of solar panel groups are installed on the roof portion 11 in the extending direction of the lower rail 31. In each row of solar panel groups, a plurality of horizontally arranged solar panels 12 are connected in a connected state by the upper rail 32. Also, each row of solar panel groups is integrally connected by the lower rail 31.

[0031] A predetermined gap S is provided between each solar panel 12 arranged in the extending direction of the lower rail 31 (between each solar panel group). This gap S is provided to prevent the rear solar panel 12 from being shaded by the front solar panel 12 in the inclined direction of each solar panel 12 and to suppress a decrease in power generation efficiency. The gap S can vary according to the inclination angle of the solar panel 12, but is generally about 100 - 300 mm.

[0032] By the way, in the building 10, as maintenance of the roof portion 11, for example, the waterproof sheet 24 of the roof portion 11 is renovated at a cycle of 10 - 20 years. The procedure for renovating the waterproof sheet 24 will be described below.

[0033] In this embodiment, in the roof part 11, it is possible to perform the repair work of the waterproof sheet 24 with the solar panel 12 (solar power generation device 13) installed on the gantry 30. The operation procedure will be specifically described below. FIG. 7 is a view showing a lifting device 40 and a jacking beam 50 used in the repair work of the waterproof sheet 24, and FIG. 8 is an explanatory view showing the operation procedure in the repair work of the waterproof sheet 24. The lifting device 40 corresponds to a lifting device for raising and lowering the gantry 30. Further, the jacking beam 50 corresponds to a beam member for holding the gantry 30 in a jacked-up state with respect to the roof part 11.

[0034] As shown in FIG. 7, the lifting device 40 has a device main body 41 having a height dimension larger than that of the solar panel 12 before the repair work (that is, the solar panel 12 in the normal use state), and a chain block 42 attached to the device main body 41. The device main body 41 has a width dimension that can be installed in the gap S between the solar panels 12 in the extending direction of the lower crossbar 31 (the left-right direction in the figure), and is arranged so as to straddle the lower crossbar 31 in the gap S. The chain block 42 is a lifting member for lifting the lower crossbar 31, and has, for example, a chain 43 composed of a load chain and a hand chain, and a hook 44 attached to the lower end of the chain 43 (load chain). In the lifting device 40, the gantry 30 can be lifted by the chain block 42 with a belt 45 wound around the lower crossbar 31 as a connecting member. Note that, as the lifting member, a pulley device using a movable pulley or the like can also be used. As the connecting member, bolts, rods, or the like can be used in addition to the belt 45.

[0035] In addition, the bulkhead 50 has a support column portion 51, a lower coupling portion 52 provided on the lower end side of the support column portion 51, and an upper coupling portion 53 provided on the upper end side of the support column portion 51. The support column portion 51 is made of, for example, a turnbuckle pipe. As the support column portion 51 rotates, the separation distance between the upper screw rod and the lower screw rod formed with reverse threads changes, enabling length adjustment. The lower coupling portion 52 can be coupled to the lower rail fixing fitting 27, and the upper coupling portion 53 can be coupled to the upper rail 32.

[0036] A cable 15 for outputting the electric power generated by the solar panel 12 is connected to the solar panel 12, and the solar panel 12 is connected to the electrical equipment on the building 10 side via the cable 15. The electrical equipment on the building 10 side is, for example, a power conversion device that converts the DC power generated by the solar panel 12 into AC power, a distribution board, a power storage device, etc. Further, an inlet 16 for drawing the cable 15 into the building 10 side is provided in the roof portion 11, and a cover 17 is attached to the inlet 16.

[0037] Next, with reference to FIG. 8, the work procedure of the worker in the repair work of the waterproof sheet 24 will be described.

[0038] In the repair work of the waterproof sheet 24, as shown in FIG. 8(a), a lifting device 40 is installed in the gap S between the solar panels 12 on the roof portion 11 (installation step). The lifting devices 40 are installed at a plurality of different locations. At this time, a belt 45 is wound around the lower rail 31, and a hook 44 of a chain block 42 is attached to the belt 45. Also, the fixing of the lower rail 31 by the lower rail fixing fitting 27 is released. In FIG. 8, for the sake of convenience, the lower rail fixing fitting 27 and the waterproof anchor 25 are shown in an integrated state.

[0039] After that, as shown in FIG. 8(b), in the lifting device 40, the lower crossbar 31 is lifted by performing a lifting operation with the chain block 42, and the gantry 30 is raised with respect to the roof part 11 (lifting step). At this time, the lifting operation may be performed simultaneously in the plurality of lifting devices 40. By lifting the lower crossbar 31, the gantry 30 is lifted upward with respect to the roof part 11 while the solar panel 12 and the gantry 30 are integrated.

[0040] Here, in the photovoltaic power generation device 13 shown in FIG. 9, in the lower crossbar 31 on the left side of the figure, the lifting device 40 can be installed at the locations A1 to A3, and in the lower crossbar 31 on the right side of the figure, the lifting device 40 can be installed at the locations B1 to B3. In this case, for example, the lifting devices 40 may be installed at two locations A1 and B1, and the two lower crossbars 31 may be lifted simultaneously by the two lifting devices 40. Thereby, the solar panel 12 and the gantry 30 are lifted integrally.

[0041] However, the arrangement pattern of the lifting devices 40 can be changed. The lifting devices 40 are installed at two locations A1 and A3 on the left lower crossbar 31, and the lifting devices 40 are installed at two locations B1 and B3 on the right lower crossbar 31. It is also possible to lift the two lower crossbars 31 simultaneously with a total of four lifting devices 40.

[0042] In the photovoltaic power generation device 13 of FIG. 9, a configuration is adopted in which four rows of solar panels 12 (solar panel groups) are installed on the pair of left and right lower crossbars 31. However, a configuration in which two rows of solar panels 12 (solar panel groups) are installed on the pair of left and right lower crossbars 31 may also be used. In this case, in the photovoltaic power generation device 13 of FIG. 9, each of the left and right lower crossbars 31 is divided into two at an intermediate position (the positions of A2 and B2 in FIG. 9), and it is preferable that the upper two solar panel groups and the lower two solar panel groups are lifted separately by the lifting device 40.

[0043] After being lifted by the lifting device 40, as shown in Fig. 8(c), while the gantry 30 is lifted by the lifting device 40, a lifting bundle 50 is assembled between the roof part 11 and the gantry 30 (bundle assembling step). At this time, in the lifting bundle 50, while adjusting the length of the support part 51, the lower coupling part 52 is coupled to the lower rail fixing fitting 27, and the upper coupling part 53 is coupled to the upper rail 32. By assembling the lifting bundle 50, the state in which the solar panel 12 and the gantry 30 are lifted with respect to the roof part 11 is maintained.

[0044] After that, with the gantry 30 being lifted by the lifting bundle 50, a repair work of the waterproof sheet 24 is carried out (maintenance step). As the repair work of the waterproof sheet 24, any one of the following works may be carried out: a work of peeling off all the waterproof sheets 24 currently laid on the roof part 11 and replacing them with new waterproof sheets 24; a work of peeling off a part of the waterproof sheets 24 currently laid and replacing the waterproof sheets 24; a work of laying new waterproof sheets 24 on top of the waterproof sheets 24 currently laid.

[0045] When the repair work of the waterproof sheet 24 is carried out in the state of Fig. 8(c), as shown in Fig. 7, the cable 15 may be lifted from the roof part 11 while being along the lower rail 31 of the gantry 30. For example, the cable 15 may be wound around the lower rail 31, or the cable 15 may be tied to the lower rail 31 with a string, tape, etc. Also, the solar panel 12 and the electrical equipment on the building 10 side are connected via the cable 15. In this case, the cable 15 may be directly drawn into the inlet 16 (cover 17) from the lower rail 31 while being away from the roof surface.

[0046] Then, the repair work of the waterproof sheet 24 is carried out in a state where power generation is performed by the solar panel 12, that is, in a state where the generated power by the solar panel 12 is supplied to the electrical equipment on the building 10 side via the cable 15.

[0047] After the repair work of the waterproof sheet 24 is completed, the lifting device 40 is installed again at the predetermined position between the solar panels 12, and the solar panels 12 and the gantry 30 are lifted by the lifting device 40. Then, with the solar panels 12 and the gantry 30 in the lifted state, the lifting bundle 50 is removed. After that, the solar panels 12 and the gantry 30 are integrally lowered by the lifting device 40, and the lower crossbar 31 is fixed by the lower crossbar fixing fitting 27 to return to the original state. Then, the lifting device 40 is recovered. Thereby, a series of repair works is completed.

[0048] According to the configuration of the present embodiment described in detail above, the following excellent effects can be obtained.

[0049] When performing maintenance on the roof part 11 (repair of the waterproof sheet 24), the gantry 30 is lifted together with the solar panels 12 using the lifting device 40, and further the lifting bundle 50 is assembled to maintain the lifted state of the gantry 30, so as to expand the working space for maintenance workers to perform maintenance work below the solar panels 12. Thereby, even without removing the solar panels 12 from the gantry 30, the maintenance of the roof part 11 can be suitably carried out. In addition, the configuration in which the solar panels 12 are installed on the gantry 30 in the building 10 with solar panels is a general configuration widely implemented. In this case, the method of lifting the solar panels 12 and the gantry 30 by the lifting device 40 and the lifting bundle 50 has a wide application range including existing solar panels. Furthermore, according to this method, for example, when constructing a building, it is not necessary to provide a panel moving mechanism in anticipation of maintenance work several years later. That is, it is possible to suppress incurring extra costs when constructing the building 10 or the like. As a result, the maintenance method of the roof part 11 in the present embodiment enables proper maintenance of the roof part 11, reduces the burden on the user, and can be widely applied to buildings with solar panels.

[0050] As described above, when maintaining the roof part 11, it is not necessary to remove the solar panel 12, so effects such as shortening the construction period by reducing the labor required for the removal work and reducing the risk of damage to the solar panel 12 caused by the removal can be obtained. Also, it is not necessary to secure a temporary placement area for the solar panel 12.

[0051] On the gantry 30, the solar panels 12 are arranged side by side in the extending direction of the lower crossbar 31. In such a configuration, a lifting device 40 is arranged between the solar panels 12, and the lower crossbar 31 is lifted by the lifting device 40. In this case, while taking into account the weight balance of the solar panels 12 arranged in the extending direction of the lower crossbar 31, the solar panel 12 and the gantry 30 can be properly lifted by the lifting device 40. Also, the work of raising a plurality of solar panels 12 together with the gantry 30 can be efficiently performed, and thus the work efficiency of maintenance can be improved.

[0052] The lifting device 40 is arranged using the gap S between the solar panels 12 in the extending direction of the lower crossbar 31, and the lower crossbar 31 is lifted by the lifting device 40. In this case, since the lifting device 40 has a larger height dimension than the solar panel 12 before lifting and is arranged in the gap S, an operator performing the lifting work can enter the gap S between the solar panels 12 and perform the work of raising the solar panel 12 in a standing posture. Therefore, it is not necessary to bend down under the solar panel 12 before lifting and perform the work of raising the solar panel 12, and the workability is good.

[0053] In the bundling step, the raised bundle 50 is fixed to the waterproof anchor 25 on the roof part side. Thereby, in a state where the solar panel 12 and the gantry 30 are lifted by the raised bundle 50, the stability of the solar panel 12 and the gantry 30 can be enhanced.

[0054] When repairing the waterproof sheet 24 on the roof part 11, if the cable 15 extending from the solar panel 12 is placed on the roof surface, there is a concern that it may interfere with the repair work of the waterproof sheet 24. In this regard, by lifting the cable 15 from the roof part 11 while keeping it along the gantry 30, it is possible to prevent the cable 15 from interfering with the repair work of the waterproof sheet 24. Also, since the cable 15 does not interfere with the repair work of the waterproof sheet 24 and the solar panel 12 remains installed on the gantry 30, it is possible to perform the repair work of the waterproof sheet 24 while continuing the power generation by the solar panel 12 during the repair period of the waterproof sheet 24.

[0055] The lifting device 40 is not left installed on the roof part 11 before and after maintenance, but can be repeatedly used in different building projects. Therefore, it is convenient for both the owner of the building 10 and the working operator.

[0056] The present invention is not limited to the above embodiment, and may be implemented, for example, as follows.

[0057] · In the gantry 30, the number of lower crossbars 31 may be three or more. Also, the number of upper crossbars 32 may be three or more.

[0058] · In the above embodiment, the gantry 30 is configured such that the upper crossbar 32 is fixed to the plurality of lower crossbars 31 by the upper crossbar fixing metal fittings 33, but this configuration may be changed. For example, a configuration may be adopted in which a plurality of support members extending upward are fixed to each lower crossbar 31, and the solar panel 12 is supported by the support members.

[0059] · As the lifting device, in addition to the lifting device 40, for example, a hydraulic jack-up device can also be used. In this case, by lifting at least one of the lower crossbar 31 and the upper crossbar 32 of the gantry 30 by the jack-up device, the solar panel 12 and the gantry 30 may be lifted. It is also possible to use a pantograph-type jack-up device.

[0060] · In the above embodiment, as an example of the maintenance of the roof portion 11, the repair work of the waterproof sheet 24 has been described. However, the maintenance of the roof portion 11 may be other work. For example, as roof waterproofing, a configuration may be adopted in which paint waterproofing is performed instead of sheet waterproofing, and re-painting (overcoating) of the waterproof paint may be performed when repairing the roof waterproofing. Further, the maintenance of the roof portion 11 may be work such as inspection or cleaning of water leakage or the like in the roof portion 11.

[0061] · In the roof portion 11, each solar panel 12 has been arranged in a so-called sawtooth pattern in which the inclination directions are the same. However, this may be changed to a corrugated pattern in which the inclination directions are alternately reversed. Further, in addition to the case where each solar panel 12 is provided in an inclined state, each solar panel 12 may be provided such that the light receiving surface thereof extends in the horizontal direction.

Explanation of Signs

[0062] 10... Building, 11... Roof portion, 12... Solar panel, 30... Stand, 40... Lifting device, 50... Jacking bundle.

Claims

1. Applied to a building in which a pedestal is provided on a roof portion composed of a pitched roof, and a solar panel is installed on the pedestal, An installation step of installing a lifting device on the roof portion, A lifting step of lifting the pedestal with respect to the roof portion by the lifting device while the solar panel and the pedestal are integrated, A bundling assembly step of assembling a lifting member between the roof portion and the pedestal while the pedestal is lifted by the lifting device, A maintenance step of performing maintenance on the roof portion while the pedestal is lifted by the bundling member, A method for maintaining a roof portion, including the above steps.

2. The pedestal has a plurality of cross members extending along the upper surface of the roof portion, and the solar panels are arranged side by side in the extending direction of the cross members, In the lifting step, the lifting device is arranged between the solar panels in the extending direction of the cross members, and the cross members are lifted by the lifting device, so that the solar panels on both sides of the lifting device in the extending direction are lifted together with the pedestal, In the bundling assembly step, the bundling member is assembled to the cross member while the pedestal is lifted by the lifting device. The method for maintaining a roof portion according to claim 1.

3. A gap is provided between the solar panels in the extending direction of the cross members, The lifting device has a height dimension larger than that of the solar panel before lifting and can be arranged in the gap, and is a lifting device that lifts the cross member by a lifting member, In the lifting step, the pedestal is lifted with respect to the roof portion by performing a lifting operation by the lifting devices installed at a plurality of locations spaced apart from each other. The method for maintaining a roof portion according to claim 2.

4. An anchor member fixed to a roof base material is provided on the roof portion, In the bundling assembly step, the bundling member is fixed to the anchor member when the bundling member is assembled while the pedestal is lifted by the lifting device. The method for maintaining a roof portion according to claim 2.

5. A maintenance method for performing repair of roof waterproofing on the upper surface of the roof portion as the maintenance of the roof portion, A cable for outputting electric power generated by the solar panel is connected to the solar panel, and the solar panel is connected to electrical equipment on the building side via the cable, In the maintenance process, with the pedestal lifted by the bundling member, the cable is floated from the roof part in a state where it is along the pedestal, and the roof waterproofing repair work is carried out while continuing the power generation by the solar panel. The method for maintaining a roof part according to any one of claims 1 to 4.

Images