Solar panel support device

Abstract

To provide a support device for a solar panel capable of easily installing a frame of the solar panel on a metal roof.SOLUTION: A solar panel support device comprises: a heat-insulating material installed on an upper surface of a steel roof material laid on a roof of a building; a first waterproof layer installed on an upper surface of the heat-insulating material; a plurality of hollow cylindrical spacers penetrating the heat insulating material and the first waterproof layer and making lower ends abut on the upper surface of the roof material; a frame provided with a base plate supported by an upper end of the spacer and a main body for holding the solar panel; a fastening member passing through the spacer to connect the base plate and the roof material; and a second waterproof layer covering the fastening member and arranged over the first waterproof layer and the substrate.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a support device for a solar panel. [Background technology]

[0002] So-called metal roofs using metal roofing underlayment such as deck plates are lighter than flat roofs made of concrete structures such as RC or ALC, and have the advantage of requiring a shorter construction period, so they are widely used mainly in factories, warehouses, large commercial facilities, etc. On the other hand, metal roofs have higher thermal conductivity than flat roofs, and as a measure against rust, an insulating and waterproof structure is applied in which insulating material and a waterproof layer are laminated on the metal roofing underlayment.

[0003] In recent years, the use of renewable energy has been demanded, and as part of this, solar power generation systems capable of generating electricity using sunlight have been attracting attention, and the installation of solar panels and the like on rooftops of buildings has been promoted in order to make effective use of dead space. However, there are installation issues when installing solar panels on, for example, a metal roof.

[0004] For example, metal deck plates as roof underlayment include flat deck plates, but grooved deck plates with peaks and valleys are often used. Because grooved deck plates have alternating peaks and valleys, some kind of ingenuity is required to properly secure the solar panel mount to the deck plate. Similar issues are also pointed out for roof underlayment formed by arranging multiple C-shaped steel members with C-shaped cross sections side by side.

[0005] In contrast, Patent Document 1 discloses a structure in which a lower member is fixed across the top surface of one deck plate and the adjacent top surface of the other, and a solar panel stand is attached to the lower member. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6066844 Summary of the Invention [Problem to be solved by the invention]

[0007] There is a demand to further reduce the number of parts and to suppress installation costs compared to the conventional technology structures.

[0008] The present invention has been made in consideration of the problems with the conventional technology, and has an object to provide a solar panel support device that enables a solar panel stand to be easily installed on a metal roof. [Means for solving the problem]

[0009] The solar panel support device of the present invention is An insulating material is installed on the upper surface of a steel roof material laid on the roof of a building; A first waterproof layer is installed on the upper surface of the thermal insulation material; a plurality of hollow cylindrical spacers that penetrate the heat insulating material and the first waterproof layer and abut the lower ends of the spacers on the upper surface of the roof material; A stand including a substrate supported by the upper end of the spacer and a body for holding a solar panel; a fastening member passing through the spacer and connecting the base plate and the roof material; The device is characterized by having a second waterproof layer that covers the fastening member and is disposed across the first waterproof layer and the substrate. Effect of the Invention

[0010] According to the present invention, it is possible to provide a solar panel support device that can easily install a solar panel stand on a metal roof. [Brief description of the drawings]

[0011] [Figure 1]FIG. 1 is a cross-sectional view of a solar panel support device according to a first embodiment, which is installed on a deck plate. [Diagram 2] FIG. 2 is a top view of the solar panel stand of the first embodiment. [Diagram 3] FIG. 3 is a side view of the solar panel stand of the first embodiment as viewed from the direction of arrow A. FIG. [Figure 4] FIG. 4 is a cross-sectional view of a solar panel support device according to the second embodiment, which is installed on a C-shaped steel member. [Diagram 5] FIG. 5 is a top view of the solar panel stand of the second embodiment. [Figure 6] FIG. 6 is a side view of the solar panel stand of the second embodiment as viewed from the direction of arrow B. FIG. [Figure 7] FIG. 7 is a cross-sectional view of a solar panel support device according to a third embodiment, which is installed on a rectangular steel material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0013] (First embodiment) FIG. 1 is a cross-sectional view of a solar panel support device according to a first embodiment, which is installed on a deck plate 1.

[0014] Deck plate 1, a steel roofing material installed on the roof of a building, is made by periodically bending a steel plate so that convex portions 1a and concave portions 1b are repeated in one direction (the left-right direction in FIG. 1). Convex portions 1a have flat top surfaces (uppermost surfaces) 1c. The width of top surface 1c is W.

[0015] A plate-like insulating material 2 having a uniform thickness is placed on the top surface 1c so as to span the recess 1b sandwiched between the top surfaces 1c. The insulating material 2 in this embodiment is made of, for example, hard polyurethane foam or polystyrene foam.

[0016] A hollow cylindrical spacer 3 is disposed so as to vertically penetrate the first waterproof sheet (first waterproof layer) 4 and the heat insulating material 2, with its lower end abutting against the top surface 1c. The upper end of the spacer 3 abuts against the lower surface of the substrate 5a of the solar panel stand 5.

[0017] A first waterproof sheet 4 is laid so as to cover the upper surface of the heat insulating material 2. The first waterproof sheet 4 may be, for example, a synthetic resin-based sheet or an asphalt-based sheet. A solar panel stand 5 is installed on the first waterproof sheet 4 and fixed to the deck plate 1 with screws (also called fastening members) 6 that penetrate the spacer 3. A second waterproof sheet (second waterproof layer) 7 is laid from the substrate 5a of the solar panel stand 5 to the first waterproof sheet 4 so as to cover the opening 5f of the substrate 5a and the screws 6.

[0018] FIG. 2 is a top view of the solar panel stand 5, and FIG. 3 is a side view of the solar panel stand 5 as viewed from the direction of arrow A. As shown in FIG.

[0019] The solar panel stand 5 has a substrate 5a and a main body 5b erected in the center of the substrate 5a. The main body 5b has a rectangular first side wall 5c and a second side wall 5d, and a square top wall 5e. The lower ends of the first side wall 5c and the second side wall 5d, which are formed by cutting out an angle bar, are fixed to the substrate 5a by welding. In this embodiment, the first side wall 5c and the second side wall 5d are parallel to two orthogonal sides of the substrate 5a.

[0020] The upper ends of the first side wall 5c and the second side wall 5d are fixed to two sides of the top wall 5e by welding, and the top wall 5e is held parallel to the base plate 5a. An opening 5s is formed in the center of the top wall 5e, and a shaft 5h of a bolt 5g is inserted through the opening 5s from below the top wall 5e. A head 5i of the bolt 5g is fixed to the underside of the top wall 5e by welding.

[0021] The shaft portion 5h protrudes upward from the top wall 5e, and can be used to support a solar panel (not shown).

[0022] The substantially square-shaped substrate 5a is made of a metal plate of uniform thickness, and has six openings 5f that penetrate in the thickness direction, arranged in two columns and three rows around the periphery of the main body 5b. More specifically, the row pitch of the openings 5f is P1, and the row pitch is P2, where P1>P2. Here, the row pitch P1 is smaller than the width W of the top surface 1c of the deck plate 1, and preferably P1=2W / 3, for example.

[0023] The inner periphery of each opening 5f has a counterbore surface on the upper side which is a tapered surface whose diameter decreases downward, and a cylindrical surface on the lower side.

[0024] The spacer 3 is made of, for example, a steel pipe and can support a large load. The inner diameter of the spacer 3 is larger than the outer diameter of the shaft portion 6b of the screw 6. It is preferable that the inner diameter of the spacer 3 is 5.5 to 12 mm, the outer diameter is 10.5 to 17 mm, and the length is 10 to 60 mm. The screw 6 is a so-called tapping screw in which a tap portion 6c is attached to the tip of the shaft portion 6b, which is a male screw portion having a smaller diameter than the head portion 6a.

[0025] In the laid state, the spacers 3 abutting against the same top surface 1c have their axes aligned with the openings 5f. As shown by dotted lines in Fig. 2, viewed along the normal direction of the substrate 5a, the spacer aligned with the opening 5f in the first row and first column is the first spacer 3(1), the spacer aligned with the opening 5f in the third row and first column is the second spacer 3(2), and the spacer aligned with the opening 5f in the first row and second column is the third spacer 3(3). In this case, the first straight line L1 connecting the center of the first spacer 3(1) and the center of the second spacer 3(2) is perpendicular to the second straight line L2 connecting the center of the first spacer 3(1) and the center of the third spacer 3(3).

[0026] 2, viewed along the normal direction of the substrate 5a, the spacer aligned with the opening 5f in the second column and third row that abuts against the same top surface 1c together with the first spacer 3(1), the second spacer 3(2), and the third spacer 3(3) is defined as the fourth spacer 3(4). At this time, the centers of the first spacer 3(1), the second spacer 3(2), the third spacer 3(3), and the fourth spacer 3(4) are respectively disposed at the vertices of a rectangle (including a square) RC, and the center of the main body 5b (opening 5s) is disposed at the center of the rectangle RC. This allows the support base 5 to be stably supported by using a plurality of spacers 3.

[0027] (How to install the stand) A method for installing the mounting base 5 will be described with reference to Fig. 1. The mounting base 5 is formed in advance in a factory or the like. First, a worker lays the heat insulating material 2 on the top surface 1c of the deck plate 1 on the roof of the building using an adhesive, and then adheres the first waterproof sheet 4 on top of the heat insulating material 2 using an adhesive (or an adhesive material previously coated on the back surface).

[0028] By laying the insulation 2 and the first waterproof sheet 4, the worker is unable to see the top surface 1c. The worker then pierces the first waterproof sheet 4 and the insulation 2 with a search needle (a thin iron rod) to find the location of the top surface 1c. The first waterproof sheet 4 and the insulation 2 are made of a relatively flexible material, and the search needle penetrates them easily. If the search needle pierces the insulation 2 and reaches downward, it is clear that the recess 1b of the deck plate 1 is below the pierced insulation 2. On the other hand, if the search needle hits a hard surface, it is clear that the top surface 1c is below the pierced insulation 2.

[0029] The worker can roughly determine the position of the top surface 1c by piercing the search needle into the insulation material 2 multiple times. In addition, since the period of the unevenness of the deck plate 1 is known, once the top surface 1c at one location is identified, the top surfaces 1c at other locations can also be identified. Therefore, the mounting stand 5 is installed on the identified top surface 1c.

[0030] The worker inserts the spacers 3 in 2 columns x 3 rows at the desired positions on the top surface 1c, penetrating the insulation material 2 and the first waterproof sheet 4, and abuts their lower ends against the top surface 1c. Then, the worker places the base plate 5a of the stand 5 on the upper ends of the spacers 3, aligning each opening 5f with the spacers 3 (see Figure 2).

[0031] Thereafter, the worker inserts the shaft portion 6b of the screw 6 into the opening 5f from above the board 5a, penetrates the spacer 3, and brings the tap portion 6c at the tip into contact with the top surface 1c.

[0032] When the worker further rotates the screw 6 using a tool (not shown), the tap portion 6c at the tip cuts to form a pilot hole 1d, and further cutting forms a female thread in the pilot hole 1d, and then the male thread provided on the shaft portion 6b of the screw 6 screws into the female thread. Note that the pilot hole 1d may be formed in advance in the top surface 1c using a tool other than the screw 6.

[0033] If the screw 6 is rotated in this state, the male and female threads will rotate relative to one another, causing the screw 6 to advance toward the top surface 1c, and the head 6a of the screw 6 will come into contact with the counterbore surface of the opening 5f, transmitting the thrust of the screw 6 to the base plate 5a. This causes the base plate 5a to descend, compressing the insulation material 2 and the first waterproof sheet 4, but when the underside of the base plate 5a comes into contact with the upper end of the spacer 3, the descent of the base plate 5a will stop, and the base plate 5a will be fixed to the deck plate 1 via the spacer 3.

[0034] Here, with the opening 5f exposed, there is a risk of rainwater leaking through the gap between the opening 5f and the screw 6. Therefore, the worker uses an adhesive (or an adhesive material coated on the back surface in advance) to attach the second waterproof sheet 7 from the first waterproof sheet 4 across at least the edge of the substrate 5a to a position covering the opening 5f. It is preferable to apply a sealant 11 between the edge of the second waterproof sheet 7 and the first waterproof sheet 4.

[0035] This completes the installation of the mount 5, and the solar panel can be installed using the shaft 5h. At this time, the load of the solar panel is supported by the deck plate 1 from the mount 5 via the six spacers 3, so the insulation material 2 is not compressed and insulation performance can be ensured for a long period of time. In addition, by using the spacers 3, compression of the insulation material 2 due to excessive tightening of the screws 6 can be prevented. If the spacers 3 were not present, the insulation material 2 would buckle due to the load of the mount 5 or excessive tightening of the screws 6, but this embodiment can prevent such a problem.

[0036] If the metal mount 5 were directly installed on the deck plate 1, both would have high thermal conductivity, causing a so-called thermal bridge phenomenon, and changes in the outside temperature would likely cause problems such as condensation. In contrast, according to this embodiment, the board 5a is connected to the deck plate 1 via the spacers 3 and screws 6, so compared to when the two are directly connected, the contact area between the metal surfaces is smaller and thermal conduction is limited, thereby suppressing the thermal bridge phenomenon and preventing condensation. In other words, according to this embodiment, only the contact surfaces of the screws 6 and spacers 3 come into contact with the deck plate 1, and the metal contact area that affects the thermal bridge phenomenon can be significantly reduced compared to when the mount 5 is directly attached to the deck plate 1.

[0037] Furthermore, when the deck plate 1 is used as the base, the first waterproof sheet 4 is not installed directly on the deck plate 1, but rather the insulation material 2 is installed on the deck plate 1, and the first waterproof sheet 4 is installed on top of that. This creates a distance between the mounting base 5 and the deck plate 1. Because of the distance between the two, if there were no spacer 3, the screws 6 would not be able to be installed straight in the vertical direction relative to the top surface 1c, and there is a risk that they would be fixed at an angle.

[0038] In contrast, according to this embodiment, the spacer 3 is placed before the screw 6 is screwed in, so that when the screw 6 is inserted into the spacer 3, the inner circumference of the spacer 3 acts as a guide, correcting the position of the screw 6 so that it is screwed in almost perpendicularly to the top surface 1c, allowing for proper construction. In other words, inserting the spacer 3 acts as a guide for the screw 6, reducing the risk of the screw 6 being fixed at an angle. In particular, the closer the inner diameter of the spacer 3 is to the thread diameter of the screw 6, the less likely the screw 6 will be fixed at an angle.

[0039] Second embodiment FIG. 4 is a cross-sectional view of a solar panel support device according to the second embodiment, which is installed on a C-shaped steel material 1A, and the direction perpendicular to the paper surface is the longitudinal direction of the C-shaped steel material 1A.

[0040] C-shaped steel material 1A, which is a steel roof material with a C-shaped (or U-shaped) cross section to be installed on the rooftop of a building, extends in a direction perpendicular to the plane of the paper in Fig. 4 and is fixed by welding via angle bars 9A at predetermined intervals to a plurality of cross beams 8A extending in the left-right direction of Fig. 4. The C-shaped steel material 1A has a flat top surface (uppermost surface) 1Ac.

[0041] Fig. 5 is a top view of a solar panel stand 5A of the second embodiment, and Fig. 6 is a side view of the solar panel stand 5A as viewed from the direction of arrow B. In Fig. 5, the stand 5A as viewed from the direction of arrow C is in the state shown in Fig. 4.

[0042] The solar panel stand 5A has a substrate 5Aa and a main body 5b erected in the center of the substrate 5Aa. The main body 5b welded to the substrate 5Aa has the same configuration as in the above-mentioned embodiment, so the same reference numerals are used and a duplicated description is omitted.

[0043] However, as shown in FIG. 5, the main body 5b has a first side wall 5c and a second side wall 5d that are inclined at 45 degrees with respect to two perpendicular sides of the substrate 5Aa.

[0044] The substantially square substrate 5Aa is made of a metal plate of uniform thickness, and has four openings 5Ak penetrating in the thickness direction, two on each side of the main body 5b, along diagonals of the substrate 5Aa.

[0045] The inner periphery of each opening 5Ak is made up of an upper counterbore surface that narrows in diameter downward, and a lower cylindrical surface.

[0046] In this embodiment, the heat insulating material 2A is a so-called sandwich type heat insulating material in which both sides of a plate-shaped hard polyurethane foam or polystyrene foam are sandwiched between a pair of metal plates 2Aa. The spacer 3, the first waterproof sheet 4, the screws 6, and the second waterproof sheet 7 are the same as those in the first embodiment, so they are denoted by the same reference numerals and will not be described again.

[0047] When laid down, the spacers 3 abutting the same top surface 1Ac have their axes aligned with the openings 5Ak. In FIG. 5, viewed along the normal direction of the substrate, the spacers 3 are shown by dotted lines. The centers of the spacers 3 are aligned on a line L3 along the longitudinal direction of the C-shaped steel material 1A (the direction of arrow C in FIG. 3). Here, two spacers 3 are placed on each side of the main body 5b. This allows for well-balanced support of the stand 5A.

[0048] (How to install the stand) A method of installing the rack 5A will be described with reference to FIG. 4. The rack 5A is formed in advance in a factory or the like. First, a worker stretches the rack 5A across the top surfaces 1Ac of adjacent C-shaped steel materials 1A on the roof of a building, and then fixes the insulating material 2A by fastening a special screw (not shown) through the insulating material 2A to the C-shaped steel material 1A, and then fixes the first waterproof sheet 4 on the insulating material 2A using an adhesive (or an adhesive material previously coated on the back surface). In this embodiment, since there is a space between the adjacent C-shaped steel materials 1A, the insulating material 2A as a sandwich type insulating material is placed between the C-shaped steel materials 1A to provide the function of a roof. Since the insulating material 2A itself has a waterproof function, the first waterproof sheet 4 is laid down to the vicinity of the rack 5A using an adhesive (or an adhesive material on the back surface). Therefore, the lower surface of the base plate 5Aa of the rack 5A abuts against the upper surface of the insulating material 2A. Note that a waterproof sheet may be laid below the rack 5A.

[0049] Although the C-shaped steel material 1A cannot be seen directly by laying the first waterproof sheet 4, the position of the top surface 1Ac can be roughly grasped from the head of the special screw exposed on the first waterproof sheet 4. The worker then drills pilot holes 1Ad in the top surface 1Ac toward the widthwise center of the grasped top surface 1Ac using a drill that penetrates the insulation material 2A and the first waterproof sheet 4. Here, four pilot holes 1Ad are drilled in a row corresponding to the openings 5Ak.

[0050] Furthermore, the worker uses a tool to form through holes around each pilot hole 1Ad, penetrating the insulation material 2A and the first waterproof sheet 4, inserts a spacer 3 into the through hole, and abuts its lower end against the top surface 1Ac.The worker then places the base plate 5Aa of the stand 5A on the upper end of the spacer 3 and aligns the opening 5Ak with the spacer 3.

[0051] Then, the worker inserts the shank 6b of the screw 6 into the opening 5Ak from above the base plate 5Aa, penetrates the spacer 3, and engages the tap portion 6c at the tip with the pilot hole 1Ad in the top surface 1Ac to form a female thread, and connects the base plate 5Aa and the C-shaped steel material 1A to each other via the spacer 3, as in the first embodiment.

[0052] The worker then uses adhesive (or an adhesive material coated on the back side in advance) to attach the second waterproof sheet 7 from the first waterproof sheet 4 to a position that spans at least the edge of the substrate 5Aa and covers the opening 5Ak and the screws 6. It is preferable to apply a sealant 11 between the edge of the second waterproof sheet 7 and the first waterproof sheet 4. This prevents rainwater from entering inward from the edge of the second waterproof sheet 7. This completes the installation of the stand 5A.

[0053] When using the insulating material 2A as a sandwich type insulating material as in this embodiment, the C-shaped steel material 1A as a base material supporting the metal plates 2Aa on both sides serves as the fixing point, so the places where the insulating material 2A is fixed are limited. According to this embodiment, the frame 5A can be fixed reliably by arranging four screws 6 and spacers 3 in a row (see FIG. 5). In addition, by using the spacers 3, deformation of the insulating material 2A as a sandwich type insulating material can be prevented. If the spacers 3 were not used, the insulating material 2A would buckle under the load of the frame 5A, but this embodiment prevents such a problem.

[0054] Furthermore, when the insulating material 2A is used as a sandwich type insulating material, a distance occurs between the frame 5A and the C-shaped steel material 1A. Because of the distance between them, if the spacer 3 were not used, the screws 6 would not be able to be installed vertically to the top surface 1Ac in a straight line, and there is a risk that they would be fixed at an angle.

[0055] In contrast, according to the present embodiment, the spacer 3 is positioned before the screw 6 is screwed in. Therefore, when the screw 6 is inserted into the spacer 3, the inner circumference of the spacer 3 acts as a guide, correcting the posture of the screw 6 so that it is screwed in almost perpendicular to the top surface 1Ac, thereby enabling proper installation.

[0056] Furthermore, when the insulation material 2A is used as a sandwich-type insulation material, the lower metal plate 2Aa contacts the C-shaped steel material 1A, but is thermally insulated from the upper metal plate 2Aa that contacts the frame 5A. In other words, since the pair of metal plates 2Aa contact only the spacer 3 and the screws 6, the contact area between the metal surfaces is small and thermal conduction is limited, thereby suppressing the thermal bridge phenomenon and preventing condensation.

[0057] Third embodiment FIG. 7 is a cross-sectional view of a support device for a solar panel according to a third embodiment, which is installed on a rectangular steel material 1B, and the direction perpendicular to the surface of the drawing corresponds to the longitudinal direction of the rectangular steel material 1B.

[0058] A square steel material 1B as a steel roof material having a hollow rectangular cross section to be installed on the rooftop of a building extends in a direction perpendicular to the plane of the paper in Fig. 7, and is fixed by welding via angle bars 9A at predetermined intervals to a plurality of cross beams 8A extending in the left-right direction in Fig. 7, as in the second embodiment. The square steel material 1B has a flat top surface (uppermost surface) 1Bc.

[0059] The stand 5B of this embodiment also has a substrate 5Ba and a main body 5b erected at the center of the substrate 5Ba. The main body 5b welded to the substrate 5Ba has the same configuration as in the above-mentioned embodiment, so the same reference numerals are used and a duplicated description is omitted. The substrate 5Ba differs from the substrate 5a of the first embodiment only in the position of the opening 5Bf, so a duplicated description of the common configuration is omitted. Four openings 5Bf (2 columns x 2 rows) can be provided around the main body 5b. In this case, the spacers 3 provided corresponding to the openings 5Bf correspond to the first spacer, second spacer, third spacer, and fourth spacer described above.

[0060] In this embodiment as well, insulation material 2A is placed between the square steel material 1B and the frame 5B as a sandwich-type insulation material, and the base plate 5Ba of the frame 5B is connected to the square steel material 1B using spacers 3 and screws 6. Since the square steel material 1B is wider in the arrangement direction (left-right direction in FIG. 7) than the C-shaped steel material 1A, two openings 5Bf are provided in the width direction, and the base plate 5Ba can be connected using the spacers 3 and screws 6, as in the first embodiment.

[0061] The construction method of the third embodiment is similar to that of the second embodiment, and therefore a duplicated description will be omitted.

[0062] In order to further suppress the thermal bridge phenomenon, for example, at least one end of the spacer 3, or preferably the entire spacer 3, may be covered with a coating of natural resin or synthetic resin, or at least one end of the spacer 3 may be fitted with a cap made of natural resin or synthetic resin, or the spacer 3 may be made of synthetic resin, thereby limiting contact between the metal surfaces of the spacer 3 and the metal base or frame.

[0063] This specification includes the disclosure of the following inventions. (First aspect) An insulating material is installed on the upper surface of a steel roof material laid on the roof of a building; A first waterproof layer is installed on the upper surface of the thermal insulation material; a plurality of hollow cylindrical spacers that penetrate the heat insulating material and the first waterproof layer and abut the lower ends of the spacers on the upper surface of the roof material; A stand including a substrate supported by the upper end of the spacer and a body for holding a solar panel; a fastening member passing through the spacer and connecting the base plate and the roof material; A support device for a solar panel, comprising: a second waterproof layer that covers the fastening members and is disposed across the first waterproof layer and the substrate.

[0064] (Second aspect) The roof material is a deck plate that is alternately folded to form a mountain-valley shape, or a steel material having a plurality of angular cross sections arranged at a distance from one another, and the heat insulating material is arranged so as to span the uppermost surfaces of the deck plate or the steel material, A first aspect of the solar panel support device, characterized in that the spacers include at least a first spacer, a second spacer, and a third spacer abutting the same top surface, and when viewed along the normal direction of the substrate, a first line connecting the centers of the first spacer and the second spacer intersects with a second line connecting the centers of the first spacer and the third spacer.

[0065] (Third aspect) the spacers further include a fourth spacer abutting the same top surface together with the first spacer, the second spacer, and the third spacer; A second aspect of the present invention is a support device for a solar panel, characterized in that, when viewed along the normal direction of the substrate, the centers of the first spacer, the second spacer, the third spacer, and the fourth spacer are respectively positioned at the vertices of a rectangle, and the center of the main body is positioned at the center of the rectangle.

[0066] (Fourth aspect) The roof material is a steel material having a plurality of C-shaped cross sections arranged at a distance from one another, and the heat insulating material is arranged so as to span the uppermost surfaces of the plurality of steel materials, A solar panel support device of the first aspect, characterized in that three or more of the spacers abut against the same steel material, and when viewed along the normal direction of the substrate, the centers of the spacers are aligned on a line along the longitudinal direction of the roof material.

[0067] (Fifth aspect) A solar panel support device according to a fourth aspect, characterized in that the spacers are arranged in pairs on either side of the main body.

[0068] (Sixth aspect) A solar panel support device according to any of the first to fifth aspects, characterized in that the fastening member is a screw member having a head and a male threaded portion having a smaller diameter than the head, the male threaded portion being inserted into the spacer through an opening formed in the substrate and the male threaded portion screwing into the female thread of the roof material.

[0069] (Seventh aspect) A sixth aspect of the solar panel support device, characterized in that the fastening member has a tap portion at the tip of the male threaded portion, and the tap portion can be rotated to spirally cut the inner circumference of the pilot hole in the roof material and form the female threaded hole.

[0070] (Eighth aspect) The solar panel support device according to any one of the first to seventh aspects, characterized in that the spacer is hollow and cylindrical, with an inner diameter of 5.5 to 12 mm, an outer diameter of 10.5 to 17 mm, and a length of 10 to 60 mm.

[0071] (Ninth aspect) A supporting device for a solar panel according to any one of the first to eighth aspects, characterized in that at least one end of the spacer is coated with a natural resin or a synthetic resin. [Explanation of symbols]

[0072] 1 Deck plate 1c, 1Ac, 1Bc top surface 2. 2A Insulation 3 Spacer 4. First waterproof sheet 5, 5A, 5B Solar panel mounting 6 bis 7. Second waterproof sheet 8A crossbeam 9A Angle material

Claims

1. An insulating material is installed on the upper surface of a steel roof material laid on the roof of a building; A first waterproof layer is installed on the upper surface of the thermal insulation material; a plurality of hollow cylindrical spacers that penetrate the heat insulating material and the first waterproof layer and abut the lower ends of the spacers on the upper surface of the roof material; A stand including a substrate supported by the upper end of the spacer and a body for holding a solar panel; a fastening member passing through the spacer and connecting the base plate and the roof material; A support device for a solar panel, comprising: a second waterproof layer that covers the fastening members and is disposed across the first waterproof layer and the substrate.

2. The roof material is a deck plate that is alternately folded to form a mountain-valley shape, or a steel material having a plurality of angular cross sections arranged at a distance from one another, and the heat insulating material is arranged so as to span the uppermost surfaces of the deck plate or the steel material, 2. The solar panel support device of claim 1, wherein the spacers include at least a first spacer, a second spacer, and a third spacer abutting the same top surface, and when viewed along the normal direction of the substrate, a first line connecting the centers of the first spacer and the second spacer intersects with a second line connecting the centers of the first spacer and the third spacer.

3. the spacers further include a fourth spacer abutting the same top surface together with the first spacer, the second spacer, and the third spacer; 3. The solar panel support device of claim 2, wherein when viewed along a normal direction of the substrate, the centers of the first spacer, the second spacer, the third spacer, and the fourth spacer are respectively positioned at vertices of a rectangle, and the center of the main body is positioned at the center of the rectangle.

4. The roof material is a steel material having a plurality of C-shaped cross sections arranged at a distance from one another, and the heat insulating material is arranged so as to span the uppermost surfaces of the plurality of steel materials, 2. The solar panel support device of claim 1, wherein three or more of the spacers abut against the same steel material, and when viewed along the normal direction of the substrate, the centers of the spacers are aligned on a line along the longitudinal direction of the roof material.

5. 5. The solar panel support device according to claim 4, wherein the spacers are arranged two on each side of the main body.

6. 2. The solar panel support device according to claim 1, wherein the fastening member is a screw member having a head and a male threaded portion having a smaller diameter than the head, the male threaded portion being inserted into the spacer through an opening formed in the substrate, and the male threaded portion being screwed into the female thread of the roof material.

7. 7. The solar panel support device of claim 6, wherein the fastening member has a tap portion at the tip of the male threaded portion, and the tap portion can be rotated to spirally cut the inner periphery of the pilot hole in the roof material and form the female threaded hole.

8. 2. The solar panel support device according to claim 1, wherein the spacer is a hollow cylinder having an inner diameter of 5.5 to 12 mm, an outer diameter of 10.5 to 17 mm, and a length of 10 to 60 mm.

9. 2. The solar panel support device according to claim 1, wherein at least one end of the spacer is coated with a natural or synthetic resin.

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