JP7628895B2 - Equipment mounting structure - Google Patents

Description

The present invention relates to a structure for mounting equipment to steel members, and more particularly to a structure for mounting equipment using magnetic force.
In this specification, the mounting structure of equipment (e.g., cable trays, lighting fixtures, lighting switch boxes, earth bars, etc.) within steel tower structures (towers or transition pieces) in offshore wind power generation facilities will be mainly described, but the present invention is not limited to these and can be applied to mounting structures of equipment to steel members in general.

In offshore wind power generation facilities, steel tower-like structures such as the tower that supports the nacelle and blades, or the transition piece between the tower and the monopile, require the placement of equipment such as cable trays and lighting fixtures within their hollow spaces.
In this case, a common method is to attach support members to the walls or beams inside the tower-like structure by welding, and then fix the equipment to the support members with bolts, nuts, etc.

However, the welded portions of the support members are susceptible to salt damage and tend to become weak spots.
In addition, support members attached by welding make it difficult to accommodate future additions, removals, or changes in the position of equipment.
In addition, specifying the locations for installing support members during the manufacture of a tower-like structure is difficult to coordinate with the construction period, since the specific specifications of the equipment, support pitch, etc. cannot be determined early on.

Therefore, Patent Document 1 proposes an equipment mounting structure using magnetic force, specifically, a suspension unit having magnetic mounting means.
This suspension unit comprises a rectangular magnet (permanent magnet) and a bolt having one end embedded in the magnet and the other end protruding from one side of the magnet; the surface of the magnet opposite the surface on which the bolt protrudes is adsorbed and fixed to a steel member, and a nut is used to secure equipment to the protruding bolt.

Special Publication No. 2005-517124

However, with the technology described in Patent Document 1, once a magnet is attached to a steel component, it cannot be removed unless a special jig is used, and fine adjustment of the attachment position is difficult, making it difficult to adjust the installation position of the equipment.

In view of the above situation, the present invention aims to provide an equipment mounting structure that uses magnetic forces to attach equipment to steel members, and that allows the mounting position of the equipment to be easily adjusted.

In order to solve the above problems, first to third aspects of the facility equipment mounting structure according to the present invention are structures for mounting facility equipment to a steel member. The steel member is a wall surface within a steel tower-like structure in an offshore wind power generation facility. The facility equipment is an earth bar extending vertically along the wall surface, and one end of an earth cable is connected to a lower end of the earth bar by a bolt and a nut, and the other end of the earth cable is grounded to the wall surface.

A first aspect of the facility equipment mounting structure according to the present invention is as follows:
a magnet member that is attracted to the wall surface by magnetic force;
a bracket portion fixed to the magnet member by a first bolt;
a holder portion to which the earth bar is attached and which is connected and fixed to the bracket portion so as to be adjustable in position relative to the bracket portion;
Including,
the bracket portion and the holder portion are fixed together by a second bolt,
The bolt insertion hole in at least one of the bracket portion and the holder portion, through which the second bolt is inserted, is a circular hole larger than the bolt diameter of the second bolt, thereby providing play for the second bolt.
A second aspect of the facility equipment mounting structure according to the present invention is as follows:
a magnet member that is attracted to the wall surface by magnetic force;
an equipment holding member fixed to the magnet member by a first bolt;
Including,
The earth bar is attached to the equipment holding member,
the magnet member has a screw hole formed on a surface opposite to the surface that is attracted to the wall surface ,
the equipment holding member is fixed by the first bolt which is screwed into the screw hole,
The bolt insertion hole in the facility equipment holding member, through which the first bolt is inserted, is a circular hole having a bolt diameter larger than the bolt diameter of the first bolt, and thus has play with respect to the first bolt.
A third aspect of the facility equipment mounting structure according to the present invention is as follows:
a magnet member that is attracted to the wall surface by magnetic force;
an equipment holding member fixed to the magnet member by a first bolt;
Including,
The earth bar is fixed to the equipment holding member by a second bolt,
The bolt insertion hole in the facility equipment holding member, through which the second bolt is inserted, is a circular hole having a bolt diameter larger than that of the second bolt, and thus has play with respect to the second bolt.
In the first to third aspects of the facility equipment mounting structure of the present invention, the magnet member has an insulating coating made of silicone resin that covers the surface of the magnet, and the coating makes the adhesive surface of the magnet member that contacts the wall surface insulating, thereby insulating the magnet member between the wall surface and the earth bar.

According to the first to third aspects of the equipment mounting structure of the present invention, by interposing the bracket portion and the holder portion, or by interposing the equipment holding member, it becomes possible to adjust the relative position (relative posture) between the bracket portion and the holder portion, between the magnet member and the equipment holding member , or between the equipment holding member and the equipment, thereby achieving the effect of making it possible and easy to adjust the mounting position of the equipment.

Schematic diagram of an offshore wind power generation facility 1 is a schematic diagram of an equipment mounting structure according to a first embodiment of the present invention; FIG. 1 is a schematic diagram of an equipment mounting structure according to a second embodiment of the present invention; FIG. 11 is a schematic diagram of an equipment mounting structure according to a third embodiment of the present invention; FIG. 13 is a schematic diagram of an equipment mounting structure according to a fourth embodiment of the present invention; FIG. 13 is a schematic diagram of an equipment mounting structure according to a fifth embodiment of the present invention; FIG. 13 is a diagram showing a modified embodiment of the magnet member;

Hereinafter, an embodiment of the present invention will be described in detail.
The embodiment described here is an example of installation of equipment within a transition piece of an offshore wind power generation facility.

Therefore, we will first explain a representative example of an offshore wind power generation facility based on the schematic diagram in Figure 1.

The offshore wind power generation facility includes a monopile 1, a transition piece 2, a tower 3, a nacelle 4, and a number of blades 5.

The monopile 1 is a hollow cylindrical steel pipe pile that is driven into the ground (bottom ground) deeper than the water bottom BW to form a pile foundation. The upper end of the monopile 1 is positioned above the water surface DL.

The transition piece 2 is a hollow cylindrical steel tower-like structure connected to the upper end of the monopile 1 for adjusting the verticality, and is connected and fixed in place with the inner circumference of the lower end of the transition piece 2 fitted into the outer circumference of the upper end of the monopile 1.

The transition piece 2 is usually divided into three or four sections (platforms) in the vertical direction, and is connected in the vertical direction by flanges at the top and bottom ends. In the case of four sections, from the bottom, they are named the lower work platform, airtight platform, cable termination platform, upper work platform, etc.

The tower 3 is a hollow cylindrical steel tower structure erected on the upper end of the transition piece 2. A deck (scaffolding) 2d for installing the tower 3 and for maintaining and managing the power generation equipment is provided on the upper end of the transition piece 2.

The nacelle 4 is a power generating unit installed at the top of the tower 3 .
The blades 5 are attached to the front end of the horizontal shaft (rotor shaft) of the nacelle 4, arranged radially, and rotated by wind force to generate power in the nacelle 4.

In an offshore wind power generation facility such as the one described above, various types of equipment are installed within the transition piece 2.

2A and 2B are schematic diagrams of an installation structure for facility equipment (cable tray) shown as a first embodiment of the present invention, in which FIG. 2A is a front view and FIG. 2B is a plan view (view taken along the line B-B of FIG. 2A).
This embodiment is an example in which a cable tray 20 serving as facility equipment is attached to a wall surface 10 within a transition piece which is a steel member.

More specifically, a cable tray 20 is attached to a wall surface 10 within the transition piece, which is a steel member, using a magnet member 11 and first and second angle members 14, 15 serving as equipment holding members.
Although the wall surface 10 is actually a cylindrical surface, it is shown here as a flat surface for simplification.

The magnet member 11 is made of a rectangular permanent magnet, and is attracted to the wall surface 10 by magnetic force at one surface (attraction surface) 11a.
The magnet member 11 also has a coating made of rubber or silicone resin (i.e., an insulating coating) that covers the surface of the rectangular permanent magnet, so that the attraction surface 11a has insulating properties.

The magnetic member 11 also has a screw hole 12 that opens to the surface (mounting surface) 11b opposite the attraction surface 11a. The equipment holding member is fixed to the magnetic member 11 by a bolt 13 that is screwed into the screw hole 12.

The equipment holding member, consisting of the first and second angle members 14, 15, includes a bracket portion (first angle member 14) that is fixed to the magnet member 11 by a bolt 13, and a holder portion (second angle member 15) that is connected to the bracket portion (first angle member 14) so that the relative position can be adjusted, and to which the equipment cable tray 20 is attached.

The first angle member 14, which corresponds to the bracket section, and the second angle member 15, which corresponds to the holder section, have the same cross-sectional shape, and their horizontal surfaces are overlapped and fixed with bolts 16 and nuts 17. Here, the bolt insertion hole of at least one of the first and second angle members 14, 15 is a circular hole larger than the bolt diameter (a so-called blind hole) or a long hole with a directional property, and has play with respect to the bolt 16. This allows fine adjustment of the relative position (relative posture) of the first and second angle members 14, 15.

The vertical surface of the first angle member 14 extends downward to form the mounting surface for the magnet member 11, and the vertical surface of the second angle member 15 extends upward to form the mounting surface for the cable tray 20.

A cable tray 20 which is an equipment component is fixed by a bolt 18 and a nut 19 to the vertical surface of a second angle member 15 which is the holder part of the equipment holding member.
The cable tray 20 is used to support and secure cables (wiring) together, has a U-shaped cross section, and has many holes in the vertical surface. Cables are secured to the appropriate holes using cable ties.

At the bolt fixing portion (13) between the magnet member 11 and the first angle member 14, which is the bracket portion of the equipment holding member, the bolt insertion hole of the first angle member 14 is a circular hole larger than the bolt diameter or a long hole with a directional property, and has play with respect to the bolt 13. This allows fine adjustment of the relative position (relative posture) between the magnet member 11 and the first angle member 14.

At the bolt fixing portion (18) between the second angle member 15, which is the holder portion of the equipment holding member, and the cable tray 20, which is the equipment, the bolt insertion hole of the second angle member 15 is a circular hole larger than the bolt diameter, or a long hole with a directional property, and has play with respect to the bolt 18 for fixing the cable tray 20. This allows fine adjustment of the relative position (relative posture) between the second angle member 15 and the cable tray 20.

According to this embodiment, by interposing the first and second angle members 14, 15 as equipment holding members, it becomes possible to adjust the relative positions (relative postures) between the magnet member 11 and the first angle member 14, between the first angle member 14 and the second angle member 15, and between the second angle member 15 and the cable tray 20, which has the effect of making it possible and easy to adjust the mounting position of the cable tray 20.

In particular, the equipment holding member includes a bracket portion (first angle member 14) that is fixed to the magnet member 11 by a bolt 13, and a holder portion (second angle member 15) that is connected and fixed to the bracket portion (first angle member 14) so that the relative position can be adjusted and to which the equipment (cable tray 20) is attached. This increases the number of adjustment points for the relative position (relative posture), enabling fine adjustment and expanding the adjustment range.

Incidentally, the surface of the magnet member 11 is coated with an insulating material made of rubber or silicone resin, which is effective in preventing contact corrosion between dissimilar metals.
Furthermore, the surface of the magnet member 11 is provided with a flexible coating made of rubber or silicone resin, which is advantageous in that it can conform to the irregularities of the attraction surface.

Figure 3 is a schematic diagram of a mounting structure for facility equipment (cable tray and lighting fixture) shown as a second embodiment of the present invention.

In this embodiment, similar to the first embodiment (Figure 2), a cable tray 20 is attached to the wall surface 10 inside the transition piece, which is a steel member, using a magnetic member 11 with a screw hole 12 and first and second angle members 14, 15 as equipment holding members, and a lighting fixture 26 is attached to the bottom of this cable tray 20 via a third angle member 21.

More specifically, the horizontal surface of a third angle member 21 with an L-shaped cross section is fixed to the lower horizontal surface (bottom surface) of the cable tray 20 with bolts 22 and nuts 23, and a lighting fixture 26 is fixed sideways to the vertical surface extending below the third angle member 21 with bolts 24 and nuts 25.

In this case, the insertion holes for bolts 22 and 24 in the third angle member 21 are circular holes larger than the bolt diameter or long holes with directional properties, allowing some play for the bolts 22 and 24. This allows fine adjustment of the relative position (relative posture) between the cable tray 20 and the third angle member 21, and between the third angle member 21 and the lighting fixture 26. This has the effect of making it possible and easy to adjust the mounting position of the lighting fixture 26.

4A and 4B are schematic diagrams of a facility equipment (lighting fixture) mounting structure shown as a third embodiment of the present invention, in which FIG. 4A is a front view and FIG. 4B is a right side view.
In this embodiment, a lighting fixture 26 is attached facing downward to a ceiling steel beam 30 of one section (platform) of a transition piece.

In more detail, the lighting fixture 26 is attached facing downward to the underside of the lower flange of the ceiling steel beam 30 using a magnet member 11 with a screw hole 12 and a Z-angle material 34 as an equipment holding member.

The Z-angle material 34 is fixed to the underside of the magnet member 11 by a bolt 13 at its upper horizontal surface (bracket portion) 34a, and the lower horizontal surface (holder portion) 34b of the Z-angle material 34 forms the mounting surface for the lighting fixture 26.

The lighting fixture 26, which is an equipment component, is fixed downward with a bolt 38 and nut 39 to the lower horizontal surface portion (holder portion) 34b of the Z-angle material 34, which is an equipment holding member.

Here, in the fixing portion of the bolts 13, 38, the bolt insertion holes of the Z-angle material 34 are circular holes (so-called blind holes) larger than the bolt diameter, or long holes with directional properties, as in the first embodiment, and have play for the bolts 13, 38. This allows the position of the Z-angle material 34 to be adjusted, and makes it possible and easy to adjust the mounting position of the lighting fixture 26 via the Z-angle material 34.

In the third embodiment, one Z angle member 34 is used as the equipment holding member, but two angle members that are connected so that the relative position can be adjusted may be used to increase the number of adjustment points for the relative position (relative posture).

5A to 5C are schematic diagrams of an installation structure for facility equipment (lighting switch box) according to a fourth embodiment of the present invention, in which FIG. 5A is a plan view, FIG. 5B is a front view, and FIG. 5C is a right side view.
In this embodiment, a lighting switch box 50 is attached to a support post (angle bar) 40 of the handrail portion of a ladder that is provided vertically within a transition piece.

More specifically, the lighting switch box 50 is attached sideways to the side of the support 40, which is a steel member, using a magnet member 11 with a screw hole 12 and a channel member 44 with an outer flange as a member for holding equipment.

The channel material 44 is fixed to the mounting surface of the magnet member 11 by a bolt 13 at the central bottom plate portion (bracket portion) 44a, and the flange portions (holder portions) 44b, 44b at both ends of the channel material 44 form the mounting surfaces for the lighting switch box 50.

The lighting switch box 50, which is a piece of equipment, is fixed sideways with bolts 48 and nuts 49 to the flanges (holder parts) 44b, 44b at both ends of the channel material 44, which is a member for holding the equipment.

Here, in the fixing portion of the bolts 13, 48, the bolt insertion holes of the channel material 44 are circular holes (so-called blind holes) larger than the bolt diameter, or long holes with directional properties, as in the first embodiment, and have play for the bolts 13, 48. This allows the position of the channel material 44 to be adjusted, and the mounting position of the light switch box 50 can be easily adjusted via the channel material 44.

In the fourth embodiment, one channel member 44 is used as the equipment holding member, but multiple angle members connected so that the relative positions can be adjusted may be used to increase the number of adjustment points for the relative position (relative posture).

6A and 6B are schematic diagrams of an equipment (earth bar) mounting structure shown as a fifth embodiment of the present invention, in which FIG. 6A is a front view and FIG. 6B is a right side view.
In this embodiment, an earth bar 60 is attached to a wall surface 10 inside a transition piece in the vertical direction along the wall surface.

In more detail, the earth bar 60 is supported on the wall surface 10 inside the transition piece using a magnet member 11 with a screw hole 12 and first and second angle members 54, 55 as equipment holding members.

The first angle iron 54 has a vertical surface portion fixed to the mounting surface of the magnet member 11 by a bolt 13, and the horizontal surface portion of the first angle iron 54 extends laterally.
The horizontal surface portion of the second angle iron 55 is fixed to the horizontal surface portion of the first angle iron 54 by a bolt 56 and a nut 57, and the vertical surface portion of the second angle iron 55 extends upward from one end of the horizontal surface portion to form the mounting surface for the earth bar 60.

The earth bar 60, which is a piece of equipment, is fixed to the vertical surface of the second angle iron 55, which is the holder part of the equipment holding member, with a bolt 58 and a nut 59.

Here, in the fixing portion of the bolts 13, 56, 58, the bolt insertion holes of the first and second angle members 54, 55 are circular holes (so-called blind holes) larger than the bolt diameter, or long holes with directional properties, as in the first embodiment, and have play with respect to the bolts 13, 56, 58. This allows the positions of the first and second angle members 54, 55 to be adjusted, and the mounting position (posture) of the earth bar 60 can be easily adjusted via these first and second angle members 54, 55.

The earth bar 60 has through holes at predetermined intervals in the longitudinal direction, and these through holes are used to connect cables for earthing, etc.
The earth bar 60 is divided into a plurality of parts in the vertical direction, and the divided pieces are connected to each other by bolts and nuts 62 via connecting plates 61.

The surface of the magnet member 11 has an insulating coating made of rubber or silicone resin. Therefore, the magnet member 11 provides insulation between the wall surface 10 inside the transition piece and the earth bar 60.

Meanwhile, one end of an earth cable 64 is connected to an appropriate earth bar 60 by a bolt and nut 63, and the other end of the earth cable 64 is grounded (structure grounded) to a wall surface 10 or the like inside the transition piece (not shown).

In the above embodiment, the magnet member 11 with the screw hole 12 is used. However, as shown in a modified embodiment in FIG. 7, the magnet member 11 with the insert bolt (stud bolt) 71 may be used.
The head of the insert bolt 71 is embedded in the magnet member 11, and the shaft portion having a male thread protrudes from the surface (mounting surface) 11b opposite to the attraction surface 11a.
Therefore, an insert bolt 71 fixed integrally to the magnet member 11 is used, and a nut 72 is also used to fix the equipment holding member (for example, the angle bar 14).

Furthermore, the illustrated embodiments are merely schematic illustrations of the present invention, and it goes without saying that the present invention includes not only what is directly shown in the described embodiments, but also various improvements and modifications made by those skilled in the art within the scope of the claims.

In addition, although the above describes the installation structure for equipment within the transition piece of an offshore wind power generation facility, the present invention can of course be applied to the installation structure for equipment within the tower of an offshore wind power generation facility, and can also be applied to the installation structure for equipment to steel members in general other than offshore wind power generation facilities. In addition, although cable trays, lighting fixtures, lighting switch boxes, and earth bars have been given as examples of equipment, the present invention can be applied to equipment in general.
The claims as originally filed were as follows:
[Claim 1]
A structure for mounting equipment to a steel member,
a magnet member that is attracted to the steel member by magnetic force;
An equipment holding member that is bolted to the magnet member;
Including,
An equipment mounting structure, characterized in that the equipment is mounted to the equipment holding member.
[Claim 2]
2. The equipment mounting structure according to claim 1, characterized in that the equipment holding member includes a bracket portion that is bolted to the magnet member, and a holder portion that is connected and fixed to the bracket portion so that its relative position can be adjusted, and to which the equipment is attached.
[Claim 3]
3. The equipment mounting structure according to claim 2, wherein the bracket portion and the holder portion are fixed by a bolt, and a bolt insertion hole of at least one of the bracket portion and the holder portion has play with respect to the bolt.
[Claim 4]
4. The facility equipment mounting structure according to claim 3, wherein the bracket portion and the holder portion are made of angle members having the same cross-sectional shape, and one side of each of the angle members is overlapped with the other and fixed by bolts.
[Claim 5]
the magnet member has a screw hole formed on a surface opposite to an attracting surface with respect to the steel member,
The equipment holding member is fixed by a bolt screwed into the screw hole,
The facility equipment mounting structure described in any one of claims 1 to 4, characterized in that the bolt insertion hole of the facility equipment holding member has play with respect to the bolt for fixing the facility equipment holding member, making it possible to adjust the attitude of the facility equipment holding member.
[Claim 6]
The equipment is fixed to the equipment holding member by bolts,
The equipment mounting structure according to any one of claims 1 to 5, characterized in that the bolt insertion hole of the equipment holding member has play for the bolt for fixing the equipment, thereby making it possible to adjust the attitude of the equipment.
[Claim 7]
7. The facility equipment mounting structure according to claim 1, wherein the magnet member has a coating made of rubber or silicone resin that covers the surface of the magnet.

REFERENCE SIGNS LIST 1 Monopile 2 Transition piece 2d Deck 3 Tower 4 Nacelle 5 Blade 10 Wall surface inside transition piece 11 Magnet member 11a Adsorption surface 11b Mounting surface 12 Screw hole 13 Bolt 14 First angle member (bracket portion of equipment holding member)
15 Second angle member (holder part of equipment holding member)
Reference Signs List 16, 17 Bolts and nuts 18, 19 Bolts and nuts 20 Cable tray 21 Third angle member 22, 23 Bolts and nuts 24, 25 Bolts and nuts 26 Lighting fixture 30 Ceiling steel beam 34 Z-angle member 38, 39 Bolts and nuts 40 Support 44 Channel member 48, 49 Bolts and nuts 50 Lighting switch box 54 First angle member 55 Second angle member 56, 57 Bolts and nuts 58, 59 Bolts and nuts 60 Earth bar 61 Connecting plate 64 Earth cable

Claims (7)

A structure for mounting equipment to a steel member,
The steel member is a wall surface within a steel tower structure in an offshore wind power generation facility,
The facility equipment is an earth bar extending vertically along the wall surface, one end of an earth cable is connected to a lower end of the earth bar by a bolt and a nut, and the other end of the earth cable is grounded to the wall surface,
The mounting structure includes:
a magnet member that is attracted to the wall surface by magnetic force;
a bracket portion fixed to the magnet member by a first bolt;
a holder portion to which the earth bar is attached and which is connected and fixed to the bracket portion so as to be adjustable in position relative to the bracket portion;
Including,
the bracket portion and the holder portion are fixed together by a second bolt,
a bolt insertion hole in at least one of the bracket portion and the holder portion, through which the second bolt is inserted, is a circular hole having a diameter larger than a bolt diameter of the second bolt , thereby providing play for the second bolt;
This facility equipment mounting structure has an insulating coating made of silicone resin that covers the surface of the magnet, and the coating gives the attracting surface of the magnet member which contacts the wall surface insulating properties, thereby insulating the magnet member from the wall surface and the earth bar . The equipment mounting structure according to claim 1, in which the bracket portion and the holder portion are made of angle bars having the same cross-sectional shape, and one side of each of the angle bars is overlapped and fixed by the second bolt. the magnet member has a screw hole formed on a surface opposite to the surface that is attracted to the wall surface ,
the bracket portion is fixed by the first bolt which is screwed into the screw hole,
3. The equipment mounting structure according to claim 1, wherein the bolt insertion hole in the bracket portion through which the first bolt is inserted is a circular hole having a larger bolt diameter than the bolt diameter of the first bolt, thereby providing play for the first bolt. The earth bar is fixed to the holder portion by a third bolt,
The equipment mounting structure according to any one of claims 1 to 3, wherein the bolt insertion hole in the holder portion through which the third bolt is inserted is a circular hole larger than the bolt diameter of the third bolt, thereby providing play for the third bolt. A structure for mounting equipment to a steel member,
The steel member is a wall surface within a steel tower structure in an offshore wind power generation facility,
The facility equipment is an earth bar extending vertically along the wall surface, one end of an earth cable is connected to a lower end of the earth bar by a bolt and a nut, and the other end of the earth cable is grounded to the wall surface,
The mounting structure includes:
a magnet member that is attracted to the wall surface by magnetic force;
an equipment holding member fixed to the magnet member by a first bolt;
Including,
The earth bar is attached to the equipment holding member,
the magnet member has a screw hole formed on a surface opposite to the surface that is attracted to the wall surface ,
the equipment holding member is fixed by the first bolt which is screwed into the screw hole,
the bolt insertion hole in the facility equipment holding member through which the first bolt is inserted is a circular hole having a diameter larger than a bolt diameter of the first bolt , thereby providing play for the first bolt;
This facility equipment mounting structure has an insulating coating made of silicone resin that covers the surface of the magnet, and the coating gives the attracting surface of the magnet member with the wall surface insulating properties, thereby insulating the magnet member between the wall surface and the earth bar . The earth bar is fixed to the equipment holding member by a second bolt,
6. The equipment mounting structure according to claim 5, wherein the bolt insertion hole in the equipment holding member through which the second bolt is inserted is a circular hole larger than a bolt diameter of the second bolt, thereby providing play for the second bolt. A structure for mounting equipment to a steel member,
The steel member is a wall surface within a steel tower structure in an offshore wind power generation facility,
The facility equipment is an earth bar extending vertically along the wall surface, one end of an earth cable is connected to a lower end of the earth bar by a bolt and a nut, and the other end of the earth cable is grounded to the wall surface,
The mounting structure includes:
a magnet member that is attracted to the wall surface by magnetic force;
an equipment holding member fixed to the magnet member by a first bolt;
Including,
The earth bar is fixed to the equipment holding member by a second bolt,
the bolt insertion hole in the facility equipment holding member through which the second bolt is inserted is a circular hole having a larger bolt diameter than the second bolt , thereby providing play for the second bolt;
This facility equipment mounting structure has an insulating coating made of silicone resin that covers the surface of the magnet, and the coating gives the attracting surface of the magnet member with the wall surface insulating properties, thereby insulating the magnet member between the wall surface and the earth bar .