JP2024000158A - Fixing method of attaching metal fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the fixing method of an attaching metal fitting to keep the fitting fixed to an attaching object over a long period.

SOLUTION: The fixing method of an attaching metal fitting comprises: a water-proof layer forming step S3 forming a first polyurea layer by spraying first polyurea resin to the surface of a fitting object; a solvent coating step S4 coating the first polyurea resin solvent to an arrangement region of fixing pieces on a surface of the first polyurea layer and a surrounding region adjacent to an outer circumference of the arrangement region to impart adhesiveness; a metal fitting arrangement step S5 arranging the fixing pieces of the attaching metal fitting in the arrangement region; and a metal fitting fixing step S6 in which a second polyurea resin is sprayed to the surrounding region and surfaces of the fixing pieces to coat, to form the second polyurea layer jointed to the first polyurea layer in the surrounding region. The metal fitting arrangement step S5 and the metal fitting fixing step S6 are performed in a state of the arrangement region and the surrounding region having adhesiveness.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a method for fixing a mounting bracket used for installing equipment to an object to be mounted.

Power generation devices that utilize sunlight and hot water generation devices that utilize solar heat include types in which devices such as photovoltaic power generation panels and solar hot water panels are mounted on the roof or the like.
Equipment is typically mounted using mounting hardware fixed on the roof. The mainstream method for fixing mounting hardware to the roof has been to involve processing the roof, such as drilling bolt holes and burying anchor bolts. However, if bolt holes are drilled in the roof or anchor bolts are buried, problems such as water infiltration from the processed parts may occur.

As a fixing method that does not involve processing on a roof, Patent Document 1 describes a fixing method in which a mounting bracket is fixed on a roof using an adhesive layer and a covering layer.
In Patent Document 1, the mounting hardware includes a plate-shaped fixing piece that extends along the ridge of the roof. In Patent Document 1, the fixing piece is bonded to the surface of the roof via an adhesive layer, and then a polyurethane resin or a polyurea resin is sprayed to bury the fixing piece in the resin, thereby fixing the mounting bracket to the roof. are doing.

Patent No. 6472586

However, the mounting hardware is made of a metal with high thermal conductivity, and is heated by solar heat and cooled by a drop in temperature. Since the mounting fittings transmit heat with high efficiency, when the mounting fittings are heated and cooled, the adhesive layer is also heated and cooled through the mounting fittings. Since deterioration of the adhesive layer is accelerated by repeated heating and cooling, there is a risk that the adhesive force will decrease and the fixing force of the mounting fittings will decrease.
As described above, the technique described in Patent Document 1 has a problem in that it is difficult to keep fixing the mounting bracket to the roof for a long period of time.
The present invention has been made in view of these circumstances, and its purpose is to continue fixing a mounting bracket to an object to be mounted over a long period of time.

In order to solve the above-mentioned problems, the present invention fixes a mounting bracket that is used for attaching a device to an attachment object and has a fixing piece that is fixed to the attachment object to the attachment object. A method for fixing a mounting bracket, the method comprising: spraying a first polyurea resin onto the surface of the object to be mounted to form a first layer; and applying a solvent for the first polyurea resin to the surface of the first layer. a step of applying adhesiveness to the arrangement area of the fixing piece and a surrounding area adjacent to the outer periphery of the arrangement area; a step of arranging the fixing piece of the mounting fitting in the arrangement area; a step of spraying and coating a second polyurea resin on a peripheral region and a surface of the fixing piece to form a second layer combined with the first layer in the peripheral region, the fixing piece being placed in the position The step of arranging it in the area and the step of forming the second layer are performed in a state where the arranging area and the surrounding area have adhesive properties.

According to the present invention, it is possible to continue fixing the mounting bracket to the object to be mounted over a long period of time.

It is a flowchart explaining the installation work of a solar power generation panel to the roof of a building. It is a perspective view explaining the cleaning process of a folded plate roof. (a) is a perspective view of the hook bolt cap, (b) is a longitudinal cross-sectional view of the hook bolt cap, and (c) is a cross-sectional view illustrating the state in which the hook bolt cap filled with filler is placed over the upper end of the hook bolt. , (d) is a perspective view illustrating a state in which the hook bolt cap is placed over the upper end of the hook bolt. (a) is a perspective view illustrating a spray device used for primer application, and (b) is a perspective view illustrating a primer application process for a folded plate roof. (a) is a diagram illustrating a polyurea spraying device, and (b) is a diagram illustrating a process of forming a waterproof layer on a folded plate roof. (a) is a sectional view illustrating a process of applying a solvent to a folded plate roof, and (b) is a perspective view illustrating a solvent application range. (a) is a perspective view of a mounting bracket, and (b) is a perspective view illustrating a state in which the mounting bracket is arranged on a folded plate roof. (a) is a diagram illustrating a process for fixing metal fittings to a folded plate roof, and (b) is a perspective view illustrating a state in which the mounting fittings are fixed to a folded plate roof. It is a perspective view explaining the state where a frame is attached to a folded plate roof via a metal fitting for attachment. FIG. 2 is a perspective view illustrating a state in which a solar power generation panel is attached to a folded plate roof. It is a perspective view explaining the cleaning process of a flat roof. It is a perspective view explaining the primer application process of a flat roof. It is a perspective view explaining the process of forming a waterproof layer on a flat roof. It is a perspective view explaining the solvent application process of a flat roof. (a) is a perspective view of a mounting bracket, and (b) is a perspective view illustrating a state in which the mounting bracket is placed on a flat roof. (a) is a diagram illustrating a process for fixing metal fittings to a flat roof, and (b) is a sectional view illustrating a state in which a fixing piece of a mounting metal fitting is fixed to a flat roof. FIG. 2 is a perspective view illustrating a state in which a solar power generation panel is attached to a flat roof. (a) is a perspective view showing a modified example of the mounting bracket for a folded-plate roof, and (b) is a sectional view illustrating a state in which a fixing piece of the mounting bracket is fixed to a folded-plate roof. (a) is a perspective view showing a modified example of a mounting bracket for a flat roof, and (b) is a sectional view illustrating a state in which a fixing piece of the mounting bracket is fixed to a flat roof.

Embodiments of the present invention will be described below with reference to the drawings. However, unless there is a specific description, the components, types, combinations, shapes, relative arrangements thereof, etc. described in this embodiment are merely illustrative examples and do not limit the scope of this invention. .

<Outline of the first embodiment>
FIG. 1 is a flowchart illustrating the installation work of a solar power generation panel 70 (see FIG. 10) to a folded plate roof 110A of a building 100A (see FIG. 2).
The solar power generation panel 70 is an example of a device according to the present invention, and the folded plate roof 110A is an example of an object to be attached according to the present invention. In the first embodiment, fixing of the mounting fittings 50 (see FIG. 7(a)) to the folded plate roof 110A is performed during the installation work of the solar power generation panel 70.
Hereinafter, a method for fixing the mounting fitting 50 according to the first embodiment will be outlined based on the flowchart in FIG. 1.

As shown in FIG. 1, in the method of fixing the mounting bracket 50, in the waterproof layer forming step S3, a first polyurea layer 43 is formed on the surface of the roofing material 111 of the folded plate roof 110A (FIG. 5(b) ).
Next, in a solvent coating step S4, a solvent 44' of the first polyurea resin 43' is locally applied to the surface of the first polyurea layer 43. The solvent 44' is applied to the arrangement area 44a (see FIG. 6(b)) of each fixing piece 52a, 52b of the mounting bracket 50 and the surrounding area 44b adjacent to the outer periphery of the arrangement area 44a (see FIG. 6(b)). ) and apply. The arrangement area 44a and the surrounding area 44b become an adhesive area 44 having adhesive properties by applying the solvent 44'.

Next, in the metal fitting placement step S5, each fixing piece 52a, 52b of the mounting metal fitting 50 is placed in the placement area 44a (see FIG. 7(b)), and then, in the metal fitting fixing step S6, the surrounding area 44b and each fixing piece are placed in the placement area 44a (see FIG. 7(b)). The surfaces of the pieces 52a, 52b are sprayed and coated with a second polyurea resin 45' to form a second polyurea layer 45 bonded to the first polyurea layer 43 in the peripheral region 44b.
These metal fitting arrangement step S5 and metal fitting fixing step S6 are performed in a state where the adhesive area 44 (arrangement area 44a, surrounding area 44b) has adhesive properties.

If the second polyurea layer 45 is simply formed over the first polyurea layer 43, the bonding strength between the first polyurea layer 43 and the second polyurea layer 45 may be insufficient. be. However, in the first embodiment, a solvent 44' is applied to a portion of the first polyurea layer 43 to form an adhesive region 44, and a second polyurea layer 45 is applied over the adhesive region 44. is forming.
The second polyurea layer 45 covers each fixing piece 52a, 52b, and is firmly bonded and integrated with the first polyurea layer 43 in the peripheral region 44b.
Each fixing piece 52a, 52b of the mounting bracket 50 is embedded within the polyurea layers 43, 45 integrated in the peripheral region 44b. Since the polyurea layers 43 and 45 have heat resistance and cold resistance, even if the mounting bracket 50 is repeatedly heated and cooled, the mounting bracket 50 continues to be fixed to the folded plate roof 110A for a long period of time. .

<First embodiment>
Hereinafter, a first embodiment will be described in which a solar power generation panel 70 is attached to a folded plate roof 110A of a building 100A.
As shown in FIG. 1, in the first embodiment, a cleaning process S1, a primer coating process S2, a waterproof layer forming process (first layer forming process) S3, a solvent coating process (adhesive layer forming process) S4, and a metal fittings placement process S5 , a metal fixture fixing step (second layer forming step) S6, and a panel attaching step S7 are performed in this order.

Each step will be explained below.
<Cleaning process S1>
FIG. 2 is a perspective view illustrating the cleaning process S1 of the folded plate roof 110A, FIG. 3(a) is a perspective view of the hook bolt cap 115, FIG. c) is a sectional view illustrating a state in which the hook bolt cap 115 filled with filler material is placed over the top end of the hook bolt 113, and FIG. 3(d) is a state in which the hook bolt cap 115 is placed over the top end of the hook bolt 113. FIG.

The folded plate roof 110A shown in FIG. 2 is a type of object to be attached according to the present invention. The folded plate roof 110A includes a roofing material 111 made of a galvalume steel plate (registered trademark) or a galvanized iron plate bent into a corrugated shape, and a girder 112 for attaching the roofing material 111 to a building.
The roof material 111 is provided with a plurality of protrusions 111a (projections, corrugated parts) that protrude upward and extend in the front-rear direction, and are arranged in a row along the left-right direction. As shown in FIG. 3C, the left side surface 111b of each protrusion 111a extends diagonally downward to the left when viewed from the front, and the right side surface 111c extends diagonally downward to the right when viewed from the front. Therefore, when viewed from the front, each protrusion 111a has a shape that gradually widens downward in a tapered shape.
In this embodiment, the girder material 112 is made of C-shaped steel, and the roof material 111 is fastened to the girder material 112 with hook bolts 113 and nuts 114.

As shown in FIG. 2, in the cleaning step S1, dirt adhering to the surface of the roof material 111 is removed. Dirt can be removed using, for example, a high-pressure washer 11 that sprays high-pressure water WJ from a nozzle 11a. When using the high-pressure washer 11, high-pressure water WJ injected from a nozzle 11a is applied to the dirt DR attached to the surface of the roofing material 111 to peel off the dirt DR from the surface of the roofing material 111 and wash it away with a water stream.
Note that the cleaning step S1 may use other methods as long as the dirt DR attached to the surface of the roofing material 111 can be removed. For example, after removing the dirt DR from the surface of the roof material 111 using a cleaning brush, the removed dirt DR may be washed away with water.

After the cleaning step S1 is completed, the upper end of the hook bolt 113 protruding from the surface of the roofing material 111 and the nut 114 are covered with a hook bolt cap 115. As shown in FIGS. 3(a) and 3(b), the hook bolt cap 115 has a two-stage cylindrical shape including a large diameter portion 115a and a small diameter portion 115b, and the inner space of the small diameter portion 115b and the large diameter portion The inner space of the diameter portion 115a communicates with each other. Further, the end of the small diameter portion 115b on the opposite side from the large diameter portion 115a is closed.
When the hook bolt cap 115 is placed over the upper end of the hook bolt 113 and the nut 114, the inner cavity of the hook bolt cap 115 is filled with a filler 116 in advance. The filler 116 is, for example, a silicone-based filler 116 that is also used as a sealant.
As shown in FIGS. 3(c) and 3(d), when the hook bolt cap 115 is placed over the tip of the hook bolt 113 and the nut 114, the filler 116 covers the tip of the hook bolt 113 and the periphery of the nut 114. The cap is sealed watertight to prevent water and dust from entering the inside of the cap.

<Primer application step S2>
FIG. 4(a) is a perspective view illustrating the spray device 12 used for applying the primer 21', and FIG. 4(b) is a perspective view illustrating the primer application step S2 of the folded plate roof 110A.
The primer 21' is a chemical agent that forms the primer layer 21 by being applied to the surface of the roofing material 111 and enhances the adhesion of the first polyurea layer 43 to the roofing material 111. As the primer 21', various types of primers such as epoxy-based, urethane-based, and epoxyurethane-based primers can be used.
The primer 21' is applied to the area in which the first polyurea layer 43 is formed on the roofing material 111. In this embodiment, since the first polyurea layer 43 is formed over the entire surface of the roofing material 111, the primer 21' is applied over the entire surface of the roofing material 111. By applying the primer 21', a primer layer 21 is formed over the entire surface of the roofing material 111.

The primer 21' can be applied by, for example, the spray device 12 shown in FIG. 4(a). The illustrated spray device 12 injects a liquid primer 21' stored in a liquid storage tank 12b from a nozzle 12d together with compressed air supplied through a pressure hose 12c by operating a lever 12a.
Note that the application of the primer 21' is not limited to the spray device 12. For example, the primer 21' may be applied using a coating roller or a brush.

<Waterproof layer forming step S3>
FIG. 5(a) is a diagram for explaining the polyurea spraying device 30, and FIG. 5(b) is a diagram for explaining the waterproof layer forming step S3 of the folded plate roof 110A.
Polyurea resin is produced by collision-mixing a polyisocyanate compound (base resin) and an amine compound having active hydrogen (curing agent) with a spray gun, and causing a chemical reaction.
The spraying device 30 shown in FIG. 5(a) collision-mixes a polyisocyanate compound 41 and an amine compound 42, forms a mist, and sprays the mist onto an object (the surface of the roofing material 111 on which the primer layer 21 is formed).

The spraying device 30 includes a first tank 31 containing a polyisocyanate compound 41, a second tank 32 containing an amine compound 42, a first pump 33 for delivering the compound 41 from the first tank 31, and a first pump 33 for delivering the compound 42 from the second tank 32. A second pump 34 that sends out a pump, a high-pressure metering pump 35 that puts sufficient pressure on both compounds 41 and 42 to send out a predetermined amount, a heater 36 that heats both compounds 41 and 42 to be transported, and maintains the temperature of both compounds 41 and 42. A spray gun 38 is provided for mixing the two compounds 41 and 42 by collision and ejecting the mixture in a mist state.
The spraying device 30 also includes a reaction control device that controls the high-pressure metering pump 35 to adjust the mixing ratio of both compounds to an appropriate ratio, and controls the heater to vary the heating temperature and the like.
The polyisocyanate compound 41 contained in the first tank 31 and the amine compound 42 contained in the second tank 32 are sucked up by the corresponding pumps 33 and 34, and are pressurized to a predetermined pressure by the high-pressure metering pump 35. Sent with . Both compounds are heated to a predetermined temperature by a heater 36 and then sent to a spray gun 38. The heated hose 37 maintains the temperature of both heated compounds until they are supplied to the spray gun 38.

As shown in FIG. 5(b), the spray gun 38 mixes the two compounds 41 and 42 by collision, and injects them in the form of a mist. Both the injected compounds 41 and 42 produce a polyurea resin 43' through a chemical reaction. The polyurea resin 43' solidifies on the surface of the roofing material 111 on which the primer layer 21 is formed, and forms a first polyurea layer 43 (first layer) that functions as a waterproof layer.
In this embodiment, the first polyurea layer 43 is formed over the entire surface of the roofing material 111. The thickness of the first polyurea layer 43 is, for example, about 0.3 mm to 2 mm. The thickness of the first polyurea layer 43 can be adjusted by changing the number of times the first polyurea layer 43 is sprayed. For example, the thickness of a polyurea layer formed by one spraying operation is about 0.3 mm, so by repeating the spraying operation twice, a polyurea layer with a thickness of about 0.6 mm can be formed. By repeating the process three times, a polyurea layer with a thickness of about 0.9 mm can be formed.

The first polyurea resin 43' constituting the first polyurea layer 43 is not particularly limited, but preferably contains a pigment for improving light reflectance. Improving the light reflectance of the first polyurea layer 43 can suppress the temperature rise of the folded plate roof 110A (roofing material 111) caused by solar heat, and in turn suppress the rise in the indoor temperature of the building 100A.
Examples of pigments for improving light reflectance include aluminum pigments. As the polyurea resin 43' containing aluminum pigment, for example, "Rhino ECO-COAT 11-85" manufactured by Rhino Lining Co., Ltd. can be used. Note that the pigment contained in the first polyurea resin 43' is not limited to aluminum pigment as long as it improves the reflectance of light. For example, an inorganic white pigment may be used.

<Solvent coating step S4>
FIG. 6(a) is a sectional view illustrating the solvent application step S4 of the folded plate roof 110A, and FIG. 6(b) is a perspective view illustrating the application range of the solvent 44'.
The solvent 44' is a liquid chemical that dissolves the surface of the first polyurea layer 43 and imparts tackiness to it by being applied to the surface of the first polyurea layer 43 after hardening.

As shown in FIG. 6A, the solvent 44' is locally applied to the surface of the first polyurea layer 43 using the coating roller 13 or the like. The application of the solvent 44' is performed, for example, by impregnating the sponge-like roller body 13a with the solvent 44', pressing the roller body 13a against the surface of the first polyurea layer 43, and rolling the roller body 13a.
Note that the application of the solvent 44' does not need to be performed using the coating roller 13. For example, the solvent 44' may be applied by a brush or by a spray device.
As shown in FIG. 6(b), in this embodiment, the solvent 44' is placed (placed, fixed, It is applied to the placement area 44a (which is left stationary) and the surrounding area 44b adjacent to the outer periphery of the placement area 44a. The surrounding region 44b is a region that surrounds the arrangement region 44a and is combined with a second polyurea layer 45 (see FIG. 8(b)), which will be described later. The area of the surrounding region 44b is set to a size that provides sufficient bonding strength with the second polyurea layer 45 (sufficient bonding strength to continue fixing the mounting bracket 50).

In this embodiment, the arrangement area 44a and the surrounding area 44b are defined on both left and right side surfaces 111b and 111c of the protrusion 111a of the roof material 111. The arrangement region 44a and the surrounding region 44b are made sticky by being coated with a solvent 44'. In other words, each area becomes a sticky area 44 by application of solvent 44'.
The adhesiveness of each region 44a, 44b weakens over time. If the adhesiveness of the surrounding region 44b becomes too weak, the bonding property with the second polyurea layer 45 will be impaired. For example, if more than 40 minutes elapse after application of the solvent 44', the bond between the peripheral region 44b and the second polyurea layer 45 will be impaired.
For convenience, in the following description, the time period (time elapsed from application of the solvent 44') during which the peripheral region 44b has a degree of adhesiveness that does not impair the bonding properties with the second polyurea layer 45 can be worked. It's called time.

<About the solvent 44'>
The solvent 44' is not particularly limited as long as it dissolves the surface of the first polyurea layer 43 and provides necessary tackiness for a working period, but for example, a product manufactured by AGC Polymer Construction Materials Co., Ltd. The name "P-60 primer" can be used.
P-60 primer is commercially available as a urethane-based primer, but it has been confirmed that it dissolves the surface of the first polyurea layer 43 and imparts tackiness for about 40 minutes. ' can be used as '.

The composition of the P-60 primer is shown in Table 1. As shown in Table 1, the P-60 primer contains toluene (43% content) and ethyl acetate (20 to 30% content) as main components.
In addition, other components of P-60 primer include xylene (less than 1%), ethylbenzene (less than 1%), 1,2,4-trimethylbenzene (6.3%), and 1,3,5-trimethylbenzene. (1.5%), n-butyl acetate (less than 1%), low-boiling aromatic solvent naphtha (1-10%), and cumene (less than 1%).

[Table 1]

<Metal fitting placement process S5>
FIG. 7(a) is a perspective view of the mounting bracket 50, and FIG. 7(b) is a perspective view illustrating a state in which the mounting bracket 50 is placed on the folded plate roof 110A.
First, the mounting bracket 50 will be explained. As shown in FIG. 7(a), the upper half of the mounting bracket 50 is a frame holding part 51 that holds the frame 60 (see FIG. 9), and the lower half is fixed to the roof material 111. This is the fixed part 52. The mounting fittings 50 are made of steel or aluminum, for example.

The frame holding portion 51 includes a left side piece 51a made of a rectangular metal plate extending in the front-rear direction and the up-down direction, and a left side piece 51a made of a metal plate similar to the left side piece 51a, and a left side piece 51a. A right side piece 51b is arranged in parallel with the left side piece 51a on the right side with a space therebetween; A connecting piece 51c that connects at the lower part of the right side piece 51b is provided.
A left protrusion 51d extending in the front-back direction is provided at an intermediate position in the height direction on the inner surface of the left piece 51a, and a right protrusion 51e extending in the front-rear direction is provided at an intermediate position in the height direction on the inner surface of the right piece 51b. is provided. The left protrusion 51d fits into the left groove 61a formed on the left side 61 of the prismatic frame 60, and the right protrusion 51e fits into the right groove 62a formed on the right side 62 of the frame 60 (see FIG. 9).
A pair of left elongated holes 51f are formed above the left protrusion 51d of the left side piece 51a at intervals along the front-rear direction, and above the right protrusion 51e of the right piece 51b, a pair of left elongated holes 51f are formed in the front-rear direction. A pair of right elongated holes 51g are formed at intervals along the line. The left elongated hole 51f and the right elongated hole 51g have an oval shape that is elongated in the vertical direction, and a fixing screw 64 (see FIG. 9) for fixing the frame 60 to the mounting fitting 50 is inserted therethrough.

The fixing part 52 includes a left fixing piece 52a made of a rectangular metal plate that extends diagonally downward to the left from the lower end of the left piece 51a, and diagonally downward to the right from the lower end of the right piece 51b. , and a right fixing piece 52b made of a rectangular metal plate extending in the front-rear direction and long in the front-rear direction.
In this embodiment, the inclination angle of the left fixing piece 52a is matched to the inclination angle of the left side surface 111b of the protrusion 111a of the roof material 111, and the inclination angle of the right fixing piece 52b is matched to the inclination angle of the right side surface 111c of the protrusion 111a. The angle of inclination is matched. That is, each fixing piece 52a, 52b has a plate shape extending along each side surface 111b, 111c of the protrusion 111a (object to be attached).

As shown in FIG. 7B, in the fitting arrangement step S5, the fixing portion 52 (left fixing piece 52a, right fixing piece 52b) of the mounting fitting 50 is arranged in the placement area 44a. The fixing portion 52 is placed in a state where the placement area 44a is adhesive. In other words, the fixing portion 52 is placed within the above-mentioned working time.
As described above, since the inclination angle of each fixed piece 52a, 52b is aligned with the inclination angle of both left and right side surfaces 111b, 111c of the protrusion 111a, when the fixed part 52 is placed, the inside of each fixed piece 52a, 52b is aligned. The entire surface is in contact with the arrangement region 44a.
Therefore, by arranging the fixing portion 52 in the adhesive arrangement region 44a, the mounting fitting 50 is temporarily fixed to the roof material 111.

<Metal fitting fixing process S6>
FIG. 8(a) is a diagram illustrating the metal fitting fixing step S6 of the folded plate roof 110A, and FIG. 8(b) is a perspective view illustrating a state in which the mounting bracket 50 is fixed to the folded plate roof 110A.
As shown in FIG. 8(a), in the fitting fixing step S6, the frame holding part 51 of the mounting fitting 50 is covered with masking tape MT, etc., and then the second polyurea resin 45 is applied from the spray gun 38 of the spraying device 30. ' is sprayed onto the surrounding area 44b and the surface of each fixing piece 52a, 52b.
The spraying of the second polyurea resin 45' is also carried out within the working time mentioned above. In other words, the second polyurea resin 45' is sprayed while the surrounding area 44b is sticky.

As shown in FIGS. 8(a) and 8(b), the second polyurea resin 45' is sprayed to form a second polyurea layer 45( 2nd layer) is formed.
As described above, since the peripheral region 44b has adhesive properties when the second polyurea resin 45' is sprayed, the second polyurea layer 45 is firmly bonded to the first polyurea layer 43 in the peripheral region 44b. integrated.
In this embodiment, the thickness of the second polyurea layer 45 is, for example, about 0.3 mm to 2 mm. Similarly to the first polyurea layer 43, the thickness of the second polyurea layer 45 can also be adjusted by changing the number of times of spraying.
Each fixing piece 52a, 52b of the mounting bracket 50 is embedded in the polyurea layers 43, 45 that are integrated by combining the second polyurea layer 45 and the first polyurea layer 43. Fixed. Since each polyurea layer 43, 45 has heat resistance and cold resistance, the mounting bracket 50 continues to be fixed to the folded plate roof 110A for a long period of time.

The second polyurea resin 45' constituting the second polyurea layer 45 is not particularly limited. As the second polyurea resin 45', for example, the product name "Rhino eXtreme HP 11-50" manufactured by Rhino Lining Co., Ltd. can be used.
Note that the tensile strength of the second polyurea resin 45' is preferably greater than the tensile strength of the first polyurea resin 43'. This means that even if the solar power generation panel 70 installed on the folded plate roof 110A is blown by the wind and an external force is applied to the mounting bracket 50 in the pulling direction, the tensile strength of the second polyurea resin 45' is maintained. This is because by making the tensile strength higher than the tensile strength of the first polyurea resin 43', the inconvenience of the second polyurea layer 45 being damaged can be suppressed.

<Panel installation process S7>
FIG. 9 is a perspective view illustrating a state in which the frame 60 is attached to the folded plate roof 110A via the mounting bracket 50, and FIG. 10 is a perspective view illustrating the state in which the solar power generation panel 70 is attached to the folded plate roof 110A. be.
As shown in FIG. 9, in the panel attachment step S7, the frame 60 is attached to the folded plate roof 110A via the attachment fittings 50. The illustrated frame 60 has a prismatic shape, and the left side surface 61 is provided with a left side groove 61a, and the right side surface 62 is provided with a right side groove 62a. Furthermore, a T-slot 63a is provided on the upper surface 63 of the frame 60. As described above, the left protrusion 51d of the attachment fitting 50 fits into the left groove 61a, and the right protrusion 51e of the attachment fitting 50 fits into the right groove 62a. Then, the frame 60 is fixed to the mounting fitting 50 with fixing screws 64 configured with, for example, tapping screws.
Next, as shown in FIG. 10, a solar power generation panel 70 is attached. The solar power generation panel 70 is attached via the frame 60. For example, a part of the panel mounting bracket (not shown) is inserted into the T-groove 63a provided on the upper surface 63 of the frame 60, and the solar power generation panel 70 is attached via the panel mounting bracket.

<Summary of the first embodiment>
As described above, in the method for fixing the mounting fitting 50 of the first embodiment, the solvent 44' is applied to the arrangement region 44a and the surrounding region 44b of the first polyurea layer 43 to impart adhesiveness. Then, each fixing piece 52a, 52b of the mounting bracket 50 is placed (placed, fixed, left still) in the placement area 44a with each area 44a, 44b having adhesive properties. Next, a second polyurea resin 45' is sprayed onto the surrounding area 44b and the surface of each fixed piece 52a, 52b to coat the second polyurea resin 45', and the second polyurea layer 45 combined with the first polyurea layer 43 is formed in the surrounding area 44b. is forming.
Since the second polyurea resin 45' is sprayed while the peripheral region 44b is sticky, the second polyurea layer 45 is firmly bonded to the first polyurea layer 43 in the peripheral region 44b. As a result, each fixing piece 52a, 52b becomes embedded inside the polyurea layers 43, 45 after bonding. Since the polyurea layers 43 and 45 have heat resistance and cold resistance, the mounting bracket 50 continues to be fixed to the folded plate roof 110A for a long period of time.

<Second embodiment>
Next, a method for fixing the mounting bracket 80 of the second embodiment in which the present invention is applied to a flat roof 110B (object to be mounted) of a building 100B will be described. Also in the second embodiment, as explained in FIG. 1, cleaning step S1, primer coating step S2, waterproof layer forming step (first layer forming step) S3, solvent coating step (adhesive layer forming step) S4, metal fittings placement step S5, a metal fixture fixing step (second layer forming step) S6, and a panel attaching step S7 are performed in this order.
Each step will be explained below, and the main points will be explained for the same contents as the fixing method of the first embodiment.

<Cleaning process S1>
FIG. 11 is a perspective view illustrating the cleaning process S1 of the flat roof 110B. As shown in FIG. 11, the flat roof 110B can also be cleaned using the high pressure washer 11.
For example, high-pressure water WJ is jetted from the nozzle 11a of the high-pressure washer 11 and applied to the dirt DR attached to the surface of the flat roof 110B, thereby peeling the dirt DR from the surface of the flat roof 110B.
Note that other methods may be used for cleaning the flat roof 110B as long as the dirt DR attached to the surface can be removed. For example, after removing the dirt DR from the surface of the flat roof 110B using a deck brush, the removed dirt DR may be washed away with water.

<Primer application step S2>
FIG. 12 is a perspective view illustrating the primer application step S2 of the flat roof 110B.
The primer 21' is a liquid chemical that is interposed between the surface of the flat roof 110B and the first polyurea layer 43 (see FIG. 13) and increases the adhesion of the first polyurea layer 43 to the flat roof 110B. It is.
In this embodiment, the primer 21' is applied over the entire surface of the flat roof 110B. Since the surface of the flat roof 110B is flat, the coating roller 14 is suitably used for applying the primer 21'. The illustrated painting roller 14 includes a sponge-like roller body 14a at the tip of a handle 14b. In this case, the primer 21' is applied to the surface of the flat roof 110B by impregnating the roller body 14a with the primer 21' and rolling the roller body 14a against the surface of the flat roof 110B. The applied primer 21' forms a primer layer 21 on the surface of the flat roof 110B as the solvent dries.
Note that the primer 21' may be applied using a tool other than the coating roller 14. For example, the primer 21' may be applied by a spray device or by a brush.

<Waterproof layer forming step S3>
FIG. 13 is a perspective view illustrating the waterproof layer forming step S3 of the flat roof 110B. In the waterproof layer forming step S3, the spraying device 30 described in FIG. 5(a) is used. For convenience, FIG. 13 shows a spray gun 38 included in the spray device 30.
As shown in FIG. 13, in the waterproof layer forming step S3, the first polyurea resin 43' is injected from the spray gun 38 to cover the entire surface of the flat roof 110B on which the primer layer 21 is formed. As a result, the first polyurea layer 43 (first layer), which functions as a waterproof layer, is formed over the entire surface of the flat roof 110B, overlapping the primer layer 21.
Regarding the first polyurea resin 43', there is no particular restriction, but it is preferable that it contains a pigment for improving the reflectance of light as in the first embodiment.

<Solvent coating step S4>
FIG. 14 is a perspective view illustrating the solvent coating step S4 of the flat roof 110B.
As shown in FIG. 14, in the solvent application step S4, a solvent 44' is applied to the surface of the first polyurea layer 43 using the coating roller 15. The illustrated painting roller 15 also includes a sponge-like roller body 15a at the tip of the handle 15b. In this case, the solvent 44' is applied to the surface of the first polyurea layer 43 by impregnating the roller body 15a with the solvent 44' and rolling the roller body 15a against the surface of the first polyurea layer 43. be done.
In FIG. 14, the solvent 44' is applied to a rectangular area, but this is because each fixing piece 81b, 81c of the mounting bracket 80 used for the flat roof 110B is approximately rectangular in plan view. (See FIG. 15(a)).

That is, the solvent 44' is applied to a square area on the surface of the first polyurea layer 43, which is formed by an arrangement area 44a where each fixing piece 81b, 81c is arranged, and a surrounding area 44b adjacent to the outer periphery of the arrangement area 44a. applied to the area of the shape. Each region 44a, 44b of the first polyurea layer 43 coated with the solvent 44' becomes a sticky region 44 that is sticky over the working time.
Note that the application of the solvent 44' may be performed using a tool other than the coating roller 15. For example, the solvent 44' may be applied by a spray device or by a brush.

<Metal fitting placement process S5>
FIG. 15(a) is a perspective view of the mounting bracket 80, and FIG. 15(b) is a perspective view illustrating the mounting bracket 80 placed on the flat roof 110B. Prior to explaining the metal fitting arrangement step S5, the mounting metal fitting 80 will be explained.
As shown in FIG. 15(a), the mounting bracket 80 has a fixing part 81 fixed to the flat roof 110B and a support part 82 that supports the solar power generation panel 70 and is fixed to the fixing part 81. We are prepared. The mounting fittings 80 are made of steel or aluminum, for example.

The fixing part 81 is made of a metal plate having a rectangular shape in a plan view, and a vertical member holding part 81a extending in the front-rear direction is provided at an intermediate position along the left-right direction.
The vertical member holding portion 81a is a portion that holds the vertical member included in the support portion 82, and is constituted by a substantially rectangular protrusion 111a that projects upward and extends in the front-rear direction. Therefore, the vertical member holding portion 81a includes a pair of left and right side walls raised upward, and a top plate that connects the upper ends of both side walls.
Further, the portion of the fixing portion 81 to the left of the vertical member holding portion 81a is a left fixing piece 81b, and the portion to the right of the vertical member holding portion 81a is a right fixing piece 81c. Each of the fixing pieces 81b and 81c is a rectangular plate in plan view, and is arranged in the arrangement area 44a. In this embodiment, the left edge of the left fixing piece 81b and the right edge of the right fixing piece 81c are each bent diagonally upward at a shallow angle.

The support portion 82 is interposed between a vertical member 82a installed on the surface of the flat roof 110B, a rail member 82b to which the solar power generation panel 70 is attached, and a rear end of the rail member 82b and a rear end of the vertical member 82a. It also includes a pillar member 82c that lifts up the rear end of the rail member 82b and tilts the rail member 82b.
The vertical member 82a is a C-shaped channel made of aluminum or steel, and is placed on the first polyurea layer 43 with its back side facing the flat roof 110B (lower side). The length of the vertical member 82a is longer than the length of the vertical member holding portion 81a in the front-rear direction. Therefore, when the vertical member 82a is held by the vertical member holding part 81a, the front part of the vertical member 82a protrudes forward beyond the front end of the vertical member holding part 81a, and the rear part of the vertical member 82a holds the vertical member. It protrudes rearward from the rear end of the portion 81a.

The rail member 82b has a front end portion fixed to the front end portion of the vertical member 82a with screws, and a rear end portion fixed above the vertical member 82a by a column member 82c. That is, the rail member 82b is attached to the vertical member 82a and the pillar member 82c in a downwardly inclined state. Furthermore, a T-groove 82e is provided on the upper surface 82d of the rail member 82b.
The pillar member 82c is a bar member for adjusting the height of the rear end portion of the rail member 82b, and connects the rear end portion of the rail member 82b and the rear end portion of the vertical member 82a. The lower end and upper end of the pillar member 82c are fixed to the rear end of the vertical member 82a and the rear end of the rail member 82b with screws, respectively.

As shown in FIG. 15(b), in the fitting placement step S5, the fixing portion 81 (left fixing piece 81b, right fixing piece 81c) of the mounting fitting 80 is placed in the placement area 44a. The fixing portion 81 is placed in a state where the placement area 44a is adhesive. In other words, the fixing portion 81 is placed within the above-mentioned working time. Therefore, the mounting bracket 80 is temporarily fixed by the adhesiveness of the arrangement area 44a.

<Metal fitting fixing process S6>
FIG. 16(a) is a diagram illustrating the step S6 of fixing the metal fittings on the flat roof 110B, and FIG. 16(b) is a sectional view illustrating the state in which each fixing piece 81b, 81c of the mounting metal fitting 80 is fixed to the flat roof 110B.
As shown in FIG. 16(a), in the metal fitting fixing step S6, the support portion 82 and the vertical member holding portion 81a of the fixing portion 81 are cured with a plastic bag PB, masking tape, etc., and then the spray A second polyurea resin 45' is sprayed from the gun 38 onto the surrounding area 44b and the surface of each fixing piece 81b, 81c.
The spraying of the second polyurea resin 45' is also carried out within the working time mentioned above. In other words, the second polyurea resin 45' is sprayed while the surrounding area 44b is sticky.

As shown in FIGS. 16(a) and 16(b), a second polyurea resin 45' is sprayed to form a second polyurea layer 45( 2nd layer) is formed.
As described above, since the peripheral region 44b has adhesive properties when the second polyurea resin 45' is sprayed, the second polyurea layer 45 is firmly bonded to the first polyurea layer 43 in the peripheral region 44b. integrated. Each fixing piece 81b, 81c of the mounting bracket 80 is embedded inside the integrated polyurea layers 43, 45 by combining and integrating the second polyurea layer 45 and the first polyurea layer 43. It will be fixed in the same state.
Since the polyurea layers 43 and 45 have heat resistance and cold resistance, the mounting bracket 80 continues to be fixed to the roof for a long period of time.
The second polyurea resin 45' constituting the second polyurea layer 45 is not particularly limited, but as explained in the first embodiment, the tensile strength of the second polyurea resin 45' is the same as that of the first polyurea resin. It is preferred that the tensile strength is greater than 43'.

<Panel installation process S7>
FIG. 17 is a perspective view illustrating a state in which the solar power generation panel 70 is attached to a flat roof 110B.
As shown in FIG. 17, in the panel attachment step S7, the solar power generation panel 70 is attached to the attachment fittings 80 fixed to the flat roof 110B. For example, a part of a panel mounting bracket (not shown) is inserted into the T-groove 82e provided on the upper surface of the rail member 82b, and the solar power generation panel 70 is attached via the panel mounting bracket.

<Summary of the second embodiment>
In this way, also in the method of fixing the mounting bracket 80 of the second embodiment, the second polyurea layer 45 is firmly bonded to the first polyurea layer 43 in the peripheral region 44b. As a result, each fixing piece 81b, 81c becomes embedded inside the polyurea layers 43, 45 after bonding.
Since the polyurea layers 43 and 45 have heat resistance and cold resistance, the mounting bracket 80 continues to be fixed to the roof for a long period of time.

<About a modified example in which an opening is provided in the fixed piece>
In each of the embodiments described above, each of the fixing pieces 52a, 52b, 81b, and 81c is constituted by a metal plate piece without an opening, but the present invention is not limited to this configuration. An opening may be provided in each of the fixed pieces 52a, 52b, 81b, and 81c.
FIG. 18(a) is a perspective view showing the mounting bracket 50A of the first modification, and FIG. 18(b) is a cross section illustrating the state in which the fixing pieces 52a, 52b of the mounting bracket 50A are fixed to the folded plate roof 110A. 19(a) is a perspective view showing a second modified example of the mounting bracket 80A, and FIG. 19(b) is a cross-section illustrating a state in which the fixing pieces 81b, 81c of the mounting bracket 80A are fixed to the flat roof 110B. It is a diagram.

In the mounting fitting 50A of the first modification shown in FIG. 18(a), a plurality of circular openings 53 are provided in each of the left fixing piece 52a and the right fixing piece 52c. Note that the other configurations of the mounting bracket 50A of the modified example are the same as those of the mounting bracket 50 of the first embodiment, so the same reference numerals are given and the description thereof will be omitted.
In the illustrated mounting bracket 50A, five openings 53 are distributed and provided in each of the fixing pieces 52a and 52b, but the shape and number of the openings 53 are not limited to this example.
In the mounting bracket 50A of the first modification, when each fixing piece 52a, 52b is placed in the placement area 44a in the metal fitting placement step S5, the portion corresponding to each opening 53 in the placement area 44a is exposed through each opening 53. do. Therefore, as shown in FIG. 18(b), when the metal fitting fixing step S6 is performed, the second polyurea layer 45 is firmly bonded to the first polyurea layer 43 through each opening 53.
Therefore, the mounting fitting 50A of the first modification can be more firmly fixed to the folded plate roof 110A than the mounting fitting 50 of the first embodiment.

Similarly to the mounting bracket 50A of the first modification, the mounting bracket 80A of the second modification example shown in FIG. A plurality of 83 are provided. Note that the other configurations of the mounting bracket 80A of the second modification are the same as those of the mounting bracket 80 of the second embodiment, so the same reference numerals are given and the description thereof will be omitted.
In the illustrated mounting bracket 80A, a total of four openings 83 are provided at the corners of each fixing piece 81b, 81c, but the shape and number of openings 83 are not limited to this example.
Also in the second modified example of the mounting fitting 80A, when each fixing piece 81b, 81c is arranged in the arrangement region 44a in the fitting arrangement step S5, the portion corresponding to each opening 83 in the arrangement region 44a is exposed. Therefore, as shown in FIG. 19(b), when the metal fixture fixing step S6 is performed, the second polyurea layer 45 is firmly bonded to the first polyurea layer 43 through each opening 83.
Therefore, the mounting fitting 80A of the second modification can be more firmly fixed to the folded plate roof 110A than the mounting fitting 80 of the second embodiment.

<About other modifications>
Regarding the object to be attached, in the first embodiment, the folded plate roof 110A was illustrated, and in the second embodiment, the flat roof 110B was illustrated, but the object to be attached is not limited to the folded plate roof 110A or the flat roof 110B. For example, it may be a wall of a building.
Although the solar power generation panel 70 is illustrated as an example of a device that can be attached using the mounting fittings 80, the device is not limited to the solar power generation panel 70. For example, it may be a solar heat collector that collects heat from the sun to heat a heat medium such as water, or it may be an outdoor unit of an air conditioner.
Each fixed piece 52a, 52b, 81b, 81c has a plate shape extending along the surface of each roof 110A, 110B, but is not limited to this shape. Any shape is acceptable as long as it can be embedded between the first polyurea layer 43 and the second polyurea layer 45. For example, it may have a prismatic shape or a round bar shape.

[Summary of embodiments, actions, and effects of the present invention]
<First embodiment>
In this aspect, fixing pieces 52a, 52b, 81b, 81c are used for attaching equipment (solar power generation panel 70, etc.) to an attachment target (folded plate roof 110A, flat roof 110B), and are fixed to the attachment target. A method for fixing mounting fittings 50, 50A, 80, 80A having a 50, 50A, 80, 80A to an object to be attached, the method comprising spraying a first polyurea resin 43' onto the surface of the object to form a first layer. (a step of forming the first polyurea layer 43) (waterproof layer forming step S3), and applying the solvent 44' of the first polyurea resin 43' to the fixing piece placement area 44a and the placement area on the surface of the first layer. A step of applying adhesive to the surrounding area 44b adjacent to the outer periphery of 44a (solvent application step S4), a step of arranging a fixing piece of the mounting fitting in the arrangement area 44a (fitting arrangement step S5), A process of spraying and coating the second polyurea resin 45' on the surface of the area 44b and the fixing piece to form a second layer (second polyurea layer 45) combined with the first layer in the surrounding area 44b (fixing the metal fittings). Step S6), and the step of arranging the fixing piece in the arrangement region 44a and the step of forming the second layer are performed in a state where the arrangement region 44a and the surrounding region 44b have adhesive properties. Features.

According to the method for fixing the mounting bracket according to this aspect, the step of arranging the fixing pieces 52a, 52b, 81b, 81c in the arrangement region 44a and the step of forming the second layer are performed in the arrangement region 44a and the surrounding region 44b. Since the second layer covering the fixing pieces 52a, 52b, 81b, and 81c is adhesive, the second layer is firmly bonded and integrated with the first layer in the surrounding area 44b. Since the first layer and the second layer are heat resistant and cold resistant, the mounting bracket can continue to be fixed to the object to be mounted for a long period of time.

<Second embodiment>
In this embodiment, the solvent 44' is characterized by containing toluene and ethyl acetate as main components.
According to the method for fixing the mounting bracket 80 according to this embodiment, since the solvent 44' contains toluene and ethyl acetate as main components, even after the first layer is cured, the Necessary adhesiveness can be imparted to the arrangement region 44a and the surrounding region 44b.

<Third embodiment>
In this embodiment, the objects to be attached are the roofs 110A and 110B of the buildings 100A and 100B, and the first polyurea resin 43' is characterized in that it contains a pigment to improve the reflectance of light.
According to the method for fixing the mounting fittings according to this embodiment, since the light reflectance of the first layer formed by the first polyurea resin 43' is improved, the temperature of the roofs 110A and 110B increases, and eventually the buildings 100A and 100B can suppress the rise in indoor temperature.

<Fourth embodiment>
This embodiment is characterized in that the pigment is an aluminum pigment.
According to the method for fixing the mounting bracket according to this embodiment, the aluminum pigment improves the light reflectance of the first layer, thereby suppressing the rise in temperature of the roofs 110A and 110B, and furthermore, the rise in the indoor temperature of the buildings 100A and 100B. can.

<Fifth embodiment>
This embodiment is characterized in that the tensile strength of the second polyurea resin 45' is greater than the tensile strength of the first polyurea resin 43'.
According to the method for fixing the mounting bracket according to this aspect, it is possible to suppress the inconvenience that the second layer is damaged.

<Sixth embodiment>
In this embodiment, the fixing piece has a plate shape extending along the surface of the object to be attached, and is provided with openings 53 and 83, and the second layer is connected to the first layer through the openings 53 and 83. It is characterized by being combined.
According to the method for fixing the mounting fittings according to this aspect, the second layer is combined with the first layer through the openings 53 and 83, so that the mounting fittings 50A and 80A can be firmly fixed.

11...High pressure washer, 11a...Nozzle, 12...Spray device, 12a...Lever, 12b...Liquid storage tank, 12c...Pressure resistant hose, 12d...Nozzle, 13...Painting roller, 13a...Roller body, 14...Painting roller , 14a...Roller body, 14b...Handle, 15...Painting roller, 15a...Roller body, 15b...Handle, 21'...Liquid primer, 21...Primer layer, 30...Polyurea spraying device, 31...First tank , 32... Second tank, 33... First pump, 34... Second pump, 35... High pressure metering pump, 36... Heater, 37... Hose with heater, 38... Spray gun, 41... Polyisocyanate compound, 42... Amine compound , 43'...first polyurea resin, 43...first polyurea layer, 44'...solvent, 44...adhesive area, 44a...arrangement area, 44b...surrounding area, 45'...second polyurea resin, 45... Second polyurea layer, 50, 50A...Folded plate roof mounting bracket, 51...Frame holding part, 51a...Left side piece, 51b...Right side piece, 51c...Connection piece, 51d...Left protrusion, 51e...Right protrusion Strip, 51f...left elongated hole, 51g...right elongated hole, 52...fixing part, 52a...left fixing piece, 52b...right fixing piece, 53...opening, 60...frame, 61...left side of frame, 61a...left Side gutter, 62...Right side of frame, 62a...Right side groove, 63...Top surface of frame, 63a...T groove, 64...Fixing screw, 70...Solar power generation panel, 80, 80A...Flat roof mounting bracket, 81... Fixing part, 81a... Vertical member holding part, 81b... Left fixing piece, 81c... Right fixing piece, 82... Support part, 82a... Vertical member, 82b... Rail member, 82c... Pillar member, 82d... Upper surface of rail member, 82e ...T groove, 83...opening, 100A...building, 110A...folded plate roof, 111...roofing material, 111a...protrusion, 111b...left side of protrusion, 111c...right side of protrusion, 112...girder material, 113... Hook bolt, 114... Nut, 115... Hook bolt cap, 115a... Large diameter part of hook bolt cap, 115b... Small diameter part of hook bolt cap, 116... Filler, 100B... Building, 110B... Flat roof, WJ... High pressure water, DR...dirt, MT...masking tape, PB...plastic bag, S1...cleaning process, S2...primer coating process, S3...waterproof layer forming process, S4...solvent coating process, S5...metal fitting placement process, S6...metal fittings Fixing process, S7...Panel installation process

Claims (6)

A method for fixing a mounting bracket, which fixes a mounting bracket having a fixing piece that is used to attach a device to an attachment target and is fixed to the attachment target to the attachment target, the method comprising:
spraying a first polyurea resin onto the surface of the object to be attached to form a first layer;
Applying a solvent of the first polyurea resin to the area where the fixing piece is placed on the surface of the first layer and the surrounding area adjacent to the outer periphery of the placement area to impart tackiness;
arranging the fixing piece of the mounting bracket in the arrangement area;
Spraying and coating a second polyurea resin on the peripheral region and the surface of the fixing piece to form a second layer combined with the first layer in the peripheral region;
Equipped with
A mounting metal fitting characterized in that the step of arranging the fixing piece in the placement area and the step of forming the second layer are performed in a state where the placement area and the surrounding area have adhesive properties. fixing method. 2. The method for fixing a mounting fitting according to claim 1, wherein the solvent contains toluene and ethyl acetate as main components. The object to be attached is a roof of a building,
2. The method for fixing a mounting fitting according to claim 1, wherein the first polyurea resin contains a pigment for improving light reflectance. 4. The method for fixing a mounting fitting according to claim 3, wherein the pigment is an aluminum pigment. 5. The method for fixing a mounting fitting according to claim 1, wherein the second polyurea resin has a tensile strength greater than that of the first polyurea resin. The fixing piece has a plate shape extending along the surface of the object to be attached, and is provided with an opening,
5. The method for fixing a mounting bracket according to claim 1, wherein the second layer is combined with the first layer through the opening.

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