Board material mounting structure

Abstract

To provide a board material attachment structure capable of obtaining a configuration that does not require markings formed in the board materials.SOLUTION: The board material attachment structure includes: a steel base material; a pair of board materials arranged so that the ends face each other and the ends are attached to the steel base material; a reinforcing material which has a flat plate sandwiched between the steel base material and board materials and a plate shape rising from the flat plate part and having a raised part placed in the joint part of the pair of board materials, and which reinforcing material is arranged so as to extend along the joint part; fastening members screwed into the flat plate and the steel base material through the board materials from the surface of the board materials so as to attach the board materials to the steel base material; and markings that are formed at predetermined intervals along the joint part on the top surface of the raised part.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a mounting structure for a board material. [Background technology]

[0002] The board joint fittings for connecting board materials described in Patent Document 1 are fittings that connect and fix base board materials that serve as the base for interior finishing materials, and are equipped with a base plate that is placed across the back edge of adjacent base board materials, and a fin portion that is formed by cutting and raising a part of the base plate and is sandwiched between adjacent base board materials. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-173040 Summary of the Invention [Problem to be solved by the invention]

[0004] BACKGROUND ART Conventionally, partition walls are sometimes constructed by attaching board materials to a lightweight steel frame (steel base material) as a base using fastening members such as drill screws.

[0005] Specifically, the board is attached to the steel substrate by screwing the fastening member through the board from the surface of the board to the steel substrate. In this configuration, in order to ensure the attachment strength of the board to the steel substrate, a metal reinforcing member may be placed between the steel substrate and the board to increase the thickness through which the fastening member can be screwed.

[0006] Here, when the fastening member is screwed into the steel base material from the surface of the board material, it is necessary to mark the screw-in position on the board material.

[0007] The object of the present disclosure is to obtain a configuration that makes it unnecessary to make markings on the board material. [Means for solving the problem]

[0008] The mounting structure for board materials in the first embodiment is characterized by comprising: a steel base material; a pair of board materials arranged with their end faces facing each other and their ends attached to the steel base material; a flat plate portion sandwiched between the steel base material and the board material; a plate-shaped reinforcing material having a raised portion rising from the flat plate portion and arranged at the joint between the pair of board materials, and arranged to extend along the joint; a fastening member that is screwed from the surface of the board material through the board material into the flat plate portion and the steel base material to attach the board material to the steel base material; and markings formed on the top surface of the raised portion at predetermined intervals along the joint.

[0009] According to the first aspect, the worker checks the position of the markings while screwing the fastening members from the surface of the board, through the board, into the flat plate portion and the steel base material. This allows the fastening members to be positioned at predetermined intervals, making it unnecessary to mark the board.

[0010] The mounting structure for board materials in the second aspect is characterized by comprising: a steel base material; a pair of board materials arranged with their end faces facing each other and their ends attached to the steel base material; a flat plate portion sandwiched between the steel base material and the board material; a plate-shaped raised portion rising from the flat plate portion and arranged at the joint between the pair of board materials, and a plurality of reinforcing materials arranged at predetermined intervals along the joint; fastening members that are screwed from the surface of the board material through the board material into the flat plate portion and the steel base material to attach the board material to the steel base material; and a flexible connecting member that connects a plurality of the reinforcing members.

[0011] According to the second aspect, the worker screws the fastening members from the surface of the board, through the board, into the flat plate portion and the steel base member while checking the position of the raised portion. This allows the fastening members to be positioned at predetermined intervals, making it unnecessary to mark the board.

[0012] The mounting structure for board material of the third aspect is characterized in that, in the mounting structure for board material described in the first or second aspect, the top surface of the raised portion and the surface of the board material are arranged in the same plane shape.

[0013] According to the third aspect, the top surface of the raised portion and the surface of the board are arranged in the same plane, which allows the worker to easily check the screwing position of the fastening member, compared to when the top surface of the raised portion is recessed relative to the surface of the board. [Effects of the Invention]

[0014] According to the present disclosure, a configuration can be obtained that does not require marking on the board material. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an exploded perspective view showing a mounting structure for a board material according to a first embodiment of the present disclosure. [Figure 2] 1 is an exploded cross-sectional view showing a mounting structure for a board material according to a first embodiment of the present disclosure. [Figure 3] 1 is a cross-sectional view showing a mounting structure for a board material according to a first embodiment of the present disclosure. [Figure 4] 1 is a perspective view showing a reinforcing material used in a mounting structure for a board material according to a first embodiment of the present disclosure. FIG. [Figure 5] 1 is a diagram showing a drill screw used in a mounting structure for a board material according to a first embodiment of the present disclosure. [Figure 6] FIG. 10 is a perspective view showing a reinforcing material used in a mounting structure for a board material according to a second embodiment of the present disclosure. [Figure 7]10 is a diagram showing a state in which a reinforcing material used in a mounting structure for a board material according to a second embodiment of the present disclosure is rolled up. [Figure 8] FIG. 10 is a cross-sectional view showing a mounting structure for a board material according to a third embodiment of the present disclosure. [Figure 9] FIG. 10 is a cross-sectional view showing a mounting structure for a board material according to a fourth embodiment of the present disclosure. [Figure 10] FIG. 10 is a cross-sectional view showing a mounting structure for a board material according to a fifth embodiment of the present disclosure. [Figure 11] FIG. 10 is a perspective view showing a reinforcing material used in a mounting structure for a board material according to a sixth embodiment of the present disclosure. [Figure 12] FIG. 11 is a cross-sectional view showing a mounting structure for a board material according to a seventh embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0016] First Embodiment An example of a mounting structure for a board material according to a first embodiment of the present disclosure will be described with reference to Figures 1 to 5. Note that arrow H shown in the figures indicates the vertical direction, i.e., the up-down direction, arrow W indicates the horizontal direction, i.e., the width direction, and arrow D indicates the horizontal direction, i.e., the depth direction. Note that arrows H, W, and D are perpendicular to each other.

[0017] First, a partition wall 100 using a board mounting structure 10 (hereinafter referred to as "board mounting structure 10") according to the first embodiment will be described.

[0018] (Partition wall 100) The partition wall 100 is a wall that separates a room from the outside of the room, and as shown in Figure 1, it is equipped with a ceiling runner 50, a floor runner 52, a plurality of studs 56, a plurality of board materials 12, a plurality of reinforcing materials 20, and drill screws 40 (see Figure 5).

[0019] [Ceiling runner 50, floor runner 52] The ceiling runner 50 and floor runner 52 are lightweight, thin-walled channels made of lightweight steel, and extend in the width direction and are spaced apart in the vertical direction, as shown in Fig. 1. The ceiling runner 50 is attached to a concrete beam (not shown), and the floor runner 52 is attached to a concrete floor slab (not shown).

[0020] [Stud 56] The studs 56 are lightweight, thin-walled channels serving as lightweight steel frames, and as shown in Fig. 1, extend vertically between the ceiling runner 50 and the floor runner 52, with a plurality of studs provided spaced apart in the width direction. The upper ends of the studs 56 are attached to the ceiling runner 50, and the lower ends of the studs 56 are attached to the floor runner 52. The studs 56 are an example of a steel base material.

[0021] In this embodiment, the stud 56 is formed using a steel plate with a thickness of 0.8 mm, and has a C-shaped cross section as shown in Fig. 2. Specifically, the stud 56 includes a plate portion 56a on the front side in the depth direction, a plate portion 56b on the rear side in the depth direction, a plate portion 56c connecting plate portions 56a and 56b, and a pair of flange portions 56d.

[0022] [Board material 12] The board material 12 is a gypsum board, which in this embodiment has a thickness of 15 mm and, as shown in FIG. 1, has a rectangular shape extending in the vertical direction when viewed from the depth direction.

[0023] Furthermore, as shown in Figures 2 and 3, the pair of board materials 12 are arranged so that the end faces 12a of the board materials 12 face each other in the width direction, and the ends of the board materials 12 are attached to the plate portions 56a of the studs 56.

[0024] [Reinforcement material 20] The reinforcing member 20 is an extrusion molded product, and as shown in FIG. 1, extends in the vertical direction along the stud 56, and is attached to the plate portion 56a of the stud 56 (see FIG. 2) using an adhesive.

[0025] 2, the reinforcing member 20 has a T-shaped cross section. Specifically, the reinforcing member 20 includes a flat plate portion 22 that is attached to the plate portion 56a and has a thickness direction that corresponds to the depth direction, and a rising portion 24 that is a plate portion that rises from the flat plate portion 22 and has a thickness direction that corresponds to the width direction.

[0026] In this embodiment, the reinforcing member 20 is an extrusion molded product of aluminum or an aluminum alloy. Furthermore, the thickness of the flat plate portion 22 is 0.8 mm, and the length in the width direction of the flat plate portion 22 is the same as the length in the width direction of the stud 56.

[0027] The raised portion 24 is disposed in the joint portion 18 of the pair of board materials 12 and is sandwiched between the pair of board materials 12. Both board surfaces of the raised portion 24 are in surface contact with the end surfaces 12a of the pair of board materials 12. The thickness of the raised portion 24 is 0.8 mm, and the height of the raised portion 24 in the depth direction (h1 shown in FIG. 2) is 10 mm or more.

[0028] 4, a plurality of markings 30 are provided at predetermined intervals on the top surface 24a of the rising portion 24 of the reinforcing material 20. The markings 30 are formed by scratching the top surface 24a of the reinforcing material 20 extruded from the extrusion molding machine, the scratching extending in a direction intersecting the extrusion direction.

[0029] In this configuration, the marking 30 is visible from the outside, and as will be described in detail later, the marking 30 serves as a guide when the drill screw 40 is screwed into the surface of the board material 12.

[0030] [Drill screw 40] 2 and 3, the drill screw 40 is used to attach the board material 12 to the stud 56. In this embodiment, the drill screw 40 is a bladed drill screw, which is a fastening member known as a reamer flexible screw. The drill screw 40 is an example of a fastening member.

[0031] As shown in Fig. 5, the drill screw 40 includes a head 42, a screw portion 44, a drill portion 46, and a blade portion 48. The head 42 is dish-shaped, and the drill portion 46 is connected to the tip of the screw portion 44. The blade portions 48 are connected to the base end of the drill portion 46, and two blade portions 48 are provided, protruding in the radial direction of the drill portion 46. The outer diameter of the blade portions 48 is larger than the diameter of the screw portion 44.

[0032] (action) While checking the marking 30 shown in Figure 4 through the joint portion 18, the worker screws the drill screw 40 from the surface of the board material 12, through the board material 12, into the flat plate portion 22 and the plate portion 56a of the stud 56, as shown in Figures 2 and 3.

[0033] Specifically, a pre-hole is formed in the board material 12 by the drill portion 46 of the rotating drill screw 40, and the outer diameter of the pre-hole is enlarged by the blade portion 48 of the drill screw 40. This forms a pilot hole in the board material 12. The pilot hole formed in the board material 12 in this manner is larger than the diameter of the thread portion 44.

[0034] Furthermore, the drill portion 46 forms pilot holes in the flat plate portion 22 of the reinforcing material 20 and the plate portion 56a of the stud 56. The pilot holes thus formed in the flat plate portion 22 and the plate portion 56a are smaller in diameter than the threaded portion 44. Meanwhile, the blade portion 48 breaks off from the drill portion 46 when it comes into contact with the flat plate portion 22 of the reinforcing material 20.

[0035] Then, the threaded portion 44 of the drill screw 40 is inserted into the pilot hole formed in the board material 12, and the threaded portion 44 of the drill screw 40 is screwed into the pilot holes formed in the flat plate portion 22 and the plate portion 56a, thereby attaching the board material 12 to the stud 56 by the drill screw 40.

[0036] (summary) As described above, in the board mounting structure 10, the worker checks the markings 30 formed on the top surface 24a of the raised portion 24 while screwing the drill screws 40 from the surface of the board material 12, through the board material 12, into the flat plate portion 22 and the plate portion 56a of the stud 56. By providing the markings 30 in this manner, the drill screws 40 are arranged at predetermined intervals, making it unnecessary to mark the board material.

[0037] Furthermore, in the board mounting structure 10, there is no need to mark the board material, which eliminates the marking process and improves construction efficiency and construction quality.

[0038] Furthermore, in the board mounting structure 10, the use of the drill screws 40 eliminates the need to drill pilot holes in the board material. This improves construction efficiency and construction quality compared to when pilot holes are required.

[0039] Furthermore, in the board mounting structure 10, the threaded portion 44 of the drill screw 40 is screwed into the flat plate portion 22 and the plate portion 56a. This ensures the mounting strength for mounting the board material 12 to the stud 56.

[0040] Furthermore, in the board mounting structure 10, the flat plate portion 22 of the reinforcing member 20 is attached to the plate portion 56a of the stud 56, thereby increasing the strength of the base into which the drill screw 40 is screwed. As a result, the blade portion 48 comes into contact with the flat plate portion 22 of the reinforcing member 20, and the blade portion 48 can be easily broken off from the drill portion 46.

[0041] Furthermore, in the board mounting structure 10, by using the drill screw 40, the pilot hole formed in the board material 12 is larger than the diameter of the threaded portion 44. This makes it possible to prevent hairline cracks from occurring in the board material 12.

[0042] In the board mounting structure 10, the cross section of the reinforcing material 20 is T-shaped, and the rising portion 24 is sandwiched between the end faces 12a of the pair of board materials 12. This makes it possible to suppress rotation of the reinforcing material 20 when the drill screw 40 is screwed into the reinforcing material 20.

[0043] Furthermore, in the board mounting structure 10, the rising portion 24 is sandwiched between the end faces 12a of the pair of board materials 12. This suppresses the generation of powder caused by the board materials 12 rubbing against each other when vibrating due to an earthquake or the like, and allows the board mounting structure 10 to be used as a partition wall in a clean room.

[0044] Second Embodiment Next, an example of a mounting structure for a board material according to a second embodiment of the present disclosure will be described with reference to Figures 6 and 7. Note that, with regard to the second embodiment, differences from the first embodiment will be mainly described.

[0045] In a board mounting structure 110 (hereinafter referred to as "board mounting structure 110") according to the second embodiment, as shown in Fig. 6, a plurality of reinforcing members 120 are provided along joint portions 18 (see Fig. 3). In other words, the reinforcing members 120 are not provided integrally along joint portions 18, but are divided into a plurality of pieces.

[0046] (Reinforcement 120) As shown in Fig. 6, the reinforcing member 120 includes a flat portion 122 and a raised portion 124, and a plurality of reinforcing members 120 are provided at intervals similar to the intervals at which the drill screws 40 are arranged along the joint portion 18 (see Fig. 3). In other words, the drill screws 40 are arranged at intervals similar to the intervals at which the reinforcing members 120 are arranged along the joint portion 18. The intervals refer to the center-to-center distance between adjacent members along the joint portion 18.

[0047] Furthermore, the board mounting structure 110 is provided with connecting members 134 that connect adjacent reinforcements 120 together.

[0048] In this configuration, the raised portion 124 is visible from the outside through the joint portion 18, and the raised portion 124 serves as a guide when the drill screw 40 is screwed into the surface of the board material 12.

[0049] (Connecting member 134) The connecting member 134 is made of a flexible resin material and is formed to extend in the vertical direction. Flexibility refers to the property of a material that can bend and deform when subjected to an external force, but does not easily expand or contract.

[0050] 6, both longitudinal ends of the connecting member 134 are attached to the reinforcing material 120, connecting both widthwise end portions of adjacent reinforcing materials 120. Specifically, a through-hole (not shown) is formed in the reinforcing material 120, and a protrusion (not shown) is formed in the connecting member 134 and pressed into the through-hole. In this way, both longitudinal ends of the connecting member 134 are attached to the reinforcing material 120.

[0051] In this configuration, before the reinforcing members 120 are attached to the studs 56, the reinforcing members 120 connected by the connecting members 134 can be wound into a roll, as shown in FIG.

[0052] (summary) As described above, in the board mounting structure 110, a plurality of reinforcing members 120 are provided at intervals similar to the intervals at which the drill screws 40 are arranged along the joints 18. Therefore, while checking the raised portions 124 through the joints 18, the worker screws the drill screws 40 from the surface of the board material 12, through the board material 12, into the flat plate portion 22 and the plate portion 56a of the stud 56. This allows the drill screws 40 to be arranged at predetermined intervals, making it unnecessary to mark the board material.

[0053] Furthermore, in the board mounting structure 110, before the reinforcing members 120 are attached to the studs 56, the reinforcing members 120 connected by the connecting members 134 can be wound into a roll. This allows for greater flexibility in terms of transportation space and storage space compared to when the reinforcing members are provided as an integral unit.

[0054] <Third embodiment> Next, an example of a mounting structure for a board material according to a third embodiment of the present disclosure will be described with reference to Fig. 8. Note that, with regard to the third embodiment, differences from the first embodiment will be mainly described.

[0055] In the board mounting structure 160 (hereinafter referred to as "board mounting structure 160") relating to the third embodiment, as shown in Figure 8, the top surface 174b of the raised portion 174 of the reinforcing material 170 and the surface 12b of the board material 12 are arranged in a similar planar shape.

[0056] This makes it easier to see the marking 30 (see FIG. 4) from the outside, compared to when the top surface of the raised portion is recessed relative to the surface of the board material.

[0057] <Fourth embodiment> Next, an example of a mounting structure for a board material according to a fourth embodiment of the present disclosure will be described with reference to Fig. 9. Note that, with regard to the fourth embodiment, differences from the first embodiment will be mainly described.

[0058] As shown in FIG. 9 , a pair of flanges 226 extending toward the rear in the depth direction are formed on both widthwise ends of the flat plate portion 22 of the reinforcing member 220 used in the board mounting structure 210 (hereinafter referred to as the "board mounting structure 210") according to the fourth embodiment. The flanges 226 are rectangular when viewed in the width direction. The flanges 226 are formed at a predetermined interval in the up-down direction. The pair of flanges 226 sandwich the stud 56 in the width direction, thereby improving the mounting strength of the reinforcing member 220 to the stud 56.

[0059] Furthermore, a flange portion 226 may be formed at the position where the marking 30 (see FIG. 4) is formed in the vertical direction. This makes it possible to prevent the reinforcing material 220 from floating relative to the stud 56 at the position where the drill screw 40 is screwed in.

[0060] Since the flange portions 226 are formed at predetermined intervals in the vertical direction, the reinforcing member 220 is formed by, for example, variable extrusion.

[0061] Fifth Embodiment Next, an example of a mounting structure for a board material according to a fifth embodiment of the present disclosure will be described with reference to Fig. 10. Note that, with regard to the fifth embodiment, differences from the first embodiment will be mainly described.

[0062] As shown in FIG. 10 , a pair of claws 276 that protrude toward the front in the depth direction are formed on both widthwise ends of the flat plate portion 22 of the reinforcing member 270 used in the board mounting structure 260 (hereinafter referred to as the "board mounting structure 260") according to the fifth embodiment. The claws 276 are triangular when viewed in the width direction. The claws 276 are formed at a predetermined interval in the up-down direction. The pair of claws 276 dig into the back surface of the board 12, thereby preventing the board 12 from moving relative to the reinforcing member 270.

[0063] Furthermore, the claw portion 276 may be formed at the position where the marking 30 (see FIG. 4) is formed in the vertical direction. In this way, the claw portion 276 is provided at the screwing position of the drill screw 40, so that the claw portion 276 can be effectively driven into the board material 12.

[0064] Since the claws 276 are formed at predetermined intervals in the vertical direction, the reinforcing material 220 is formed by, for example, variable extrusion.

[0065] Sixth Embodiment Next, an example of a mounting structure for a board material according to a sixth embodiment of the present disclosure will be described with reference to Fig. 11. Note that, with regard to the sixth embodiment, differences from the first embodiment will be mainly described.

[0066] A protrusion 322 that protrudes toward the front in the depth direction is formed on the rising portion 24 of a reinforcing member 320 used in a board mounting structure 310 (hereinafter referred to as "board mounting structure 310") according to the sixth embodiment. A top surface 322a of this protrusion 322 is disposed in the same planar shape as the surface 12b of the board 12 (see FIG. 3).

[0067] In this configuration, the operator can more easily recognize the screwing position of the drill screw 40 compared to when no protrusion is provided.

[0068] Seventh Embodiment Next, an example of a mounting structure for a board material according to a seventh embodiment of the present disclosure will be described with reference to Fig. 12. Note that, with regard to the seventh embodiment, differences from the first embodiment will be mainly described.

[0069] A reinforcing member 370 used in a board mounting structure 360 ​​(hereinafter referred to as "board mounting structure 360") according to the seventh embodiment is configured to include two L-shaped plate members 380, as shown in FIG.

[0070] Although the present disclosure has been described in detail with respect to specific embodiments, it is clear to those skilled in the art that the present disclosure is not limited to such embodiments and that various other embodiments are possible within the scope of the present disclosure. Modifications, deletions, additions, and combinations of the embodiments are possible as long as they do not contradict the technical ideas that can be recognized by those skilled in the art from the claims, the specification, and the drawings.

[0071] Furthermore, in the above-described embodiments, the reinforcing members 20, 120, 170, 220, 270, 320, and 370 are formed using aluminum or an aluminum alloy, but they may also be formed using other metal materials.

[0072] In the above embodiments, the reinforcing members 20, 120, 170, 220, 270, 320, and 370 are formed using aluminum or an aluminum alloy, but the reinforcing members may be magnetized using other magnetizable metals, which allows the reinforcing members to be easily attached to the studs 56.

[0073] Although not specifically described in the above embodiment, the corners of the board material may be chamfered and a filler may be applied to the joints 18 .

[0074] Furthermore, in the above embodiment, a gypsum board is used as the board material 12, but for example, a concrete board or the like may also be used.

[0075] Although not specifically described in the above embodiment, vertically extending joint portions and horizontally extending joint portions may intersect in a cross shape. At these intersecting portions, a pair of vertically extending reinforcing members may abut against each other, and a pair of horizontally extending reinforcing members may abut against each other. In such cases, for example, the ends of the pair of vertically extending reinforcing members may abut against each other, and the ends of the pair of horizontally extending reinforcing members may abut against the sides of the vertically extending reinforcing members.

[0076] 7, the reinforcing members 120 connected by the connecting members 134 are wound into a roll. As an example, the reinforcing members 120 are wound into a roll so that the rising portions 124 of the reinforcing members 120 are positioned outward relative to the flat portions 122. However, the reinforcing members 120 may also be wound into a roll so that the flat portions 122 of the reinforcing members 120 are positioned outward relative to the rising portions 124. In this case, the reinforcing members 120 can be aligned with the plate portions 56a of the studs 56 while the plurality of reinforcing members 120 wound into a roll are unfolded. [Explanation of symbols]

[0077] 10 Board material mounting structure (board mounting structure) 12 Board material 12a End face 12b surface 18 Joint 20 Reinforcement 22 Flat plate part 24 Start-up section 24a Top surface 30 Marking 40 Drill screws (an example of a fastening component) 56 Stud (an example of steel base material) 110 Board material mounting structure (board mounting structure) 120 Reinforcement 122 Flat plate part 124 Start-up section 134 Connecting member 160 Board material mounting structure (board mounting structure) 170 Reinforcement 174 Start-up section 174b Top surface 210 Board material mounting structure (board mounting structure) 220 Reinforcement 260 Board material mounting structure (board mounting structure) 270 Reinforcement 310 Board material mounting structure (board mounting structure) 320 Reinforcement 360 Board material mounting structure (board mounting structure) 370 Reinforcement

Claims

1. Steel substrate and A pair of board materials arranged so that their end faces face each other and their ends are attached to the steel base material; a reinforcing material having a flat plate portion sandwiched between the steel base material and the board material, and a plate-shaped rising portion rising from the flat plate portion and disposed in the joint portion of the pair of board materials, the reinforcing material being disposed so as to extend along the joint portion; a fastening member that is screwed from the surface of the board material through the board material into the flat plate portion and the steel base material to attach the board material to the steel base material; markings formed at predetermined intervals along the joint portion on the top surface of the raised portion; A mounting structure for board material.

2. Steel substrate and A pair of board materials arranged so that their end faces face each other and their ends are attached to the steel base material; a reinforcing member having a flat plate portion sandwiched between the steel base material and the board material, and a plate-shaped rising portion rising from the flat plate portion and disposed at a joint portion between the pair of board materials, the reinforcing member being provided at predetermined intervals along the joint portion; a fastening member that is screwed from the surface of the board material through the board material into the flat plate portion and the steel base material to attach the board material to the steel base material; a flexible connecting member that connects the plurality of reinforcing members; A mounting structure for board material.

3. The top surface of the raised portion and the surface of the board material are arranged in the same plane shape.

3. The board mounting structure according to claim 1 or 2.

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