JP7614955B2 - Lightning protection equipment and installation methods - Google Patents

Description

This disclosure relates to a lightning protection device installed in a building and a method for installing the lightning protection device.

Patent Publication No. 3251928 describes a lightning protection method for the exterior walls of the upper floors of a high-rise building. In this method, a PC board with lightning protection means is attached to the exterior wall of the upper floors of a high-rise building. The PC board with lightning protection means comprises a PC board and a plate-shaped vertical lightning conductor made of stainless steel. Anchor bolts are embedded in the PC board, and a number of supports, bolts, nuts, and connecting rods are provided on the vertical lightning conductor. The connecting rods are connected to the vertical lightning conductor by bolts and nuts. The connecting rods are electrically connected to the anchor bolts of the PC board by means such as welding. In this way, the PC board is connected to the vertical lightning conductor to form a PC board with lightning protection means.

A PC board with lightning protection means is attached to the beams on the upper floors of a high-rise building. A conductor wire is welded to the reinforcing bars or steel frame located on the inside of the beam, and is arranged to extend vertically downward from the beam. A connection terminal is provided on the end of the conductor wire opposite the beam, which is connected to the anchor bolt of the PC board with lightning protection means. Two nuts and a connection washer that is sandwiched between the two nuts are attached to the anchor bolt, and the connection terminal has a cylindrical sleeve attached to the end of the conductor wire. The sleeve of the connection terminal is connected to the connection washer of the anchor bolt, so that the conductor wire extending from the beam is connected to the anchor bolt of the PC board with lightning protection means.

Patent No. 3251928

The PC board with lightning protection means described above is constructed by connecting together a PC board with embedded anchor bolts and a vertical lightning conductor with connecting rods that is connected to the PC board. Conductors must be installed in the beams of the building and connected to the anchor bolts of the PC board via connection terminals. This creates a problem in that it takes time and effort to prepare a PC board with lightning protection means in advance, install conductors in the beams, and connect the conductors to the anchor bolts. As such, the installation of the PC board with lightning protection means described above is time-consuming, and the current situation is that lightning protection equipment cannot be installed efficiently on buildings.

The purpose of this disclosure is to provide a lightning protection device that can be installed efficiently and a method for installing the lightning protection device.

The lightning protection equipment according to the present disclosure is a lightning protection equipment to be installed on a building, comprising: a panel conductor connecting member to be connected to a metal panel; and a building conductor connecting member to which a temporary connection means can be connected at a position facing an end face of the metal panel and which connects the panel conductor connecting member and the building to each other , wherein the metal panel is an exterior wall panel to be fixed to a conductive base material of the building, the lightning protection equipment is made of a conductive member and fixed to the joints between a plurality of metal panels, and forms a conductive path to the base material with the metal panel and the lightning protection equipment as a lightning receiving part, wherein the panel conductor connecting member comprises a first connecting member and a second connecting member, the first connecting member is electrically connected to a main surface of the metal panel, the building conductor connecting member has an anchor nut arranged at a position facing the end face of the metal panel and is electrically connected to the base material, the first connecting member is fastened to the anchor nut via the second connecting member, and the temporary connection means having a predetermined anchor is connected to the building conductor connecting member by the connection between the anchor and the anchor nut .

This lightning protection equipment includes a panel conductor connection member connected to the metal panel, and a building conductor connection member that connects the panel conductor connection member and the building to each other. Thus, the lightning current received by the metal panel can be conducted to the building via the panel conductor connection member and the building conductor connection member. The panel conductor connection member is connected to the metal panel, and the building conductor connection member conductor-connects the panel conductor connection member to the building at a position facing the end face of the metal panel. Therefore, the lightning protection equipment can be installed efficiently because the panel conductor connection member can be conductor-connected to the building via the building conductor connection member arranged at a position facing the end face of the metal panel. In other words, by using the building conductor connection member arranged at a position facing the end face of the metal panel, it is not necessary to prepare a PC board with lightning protection means including anchor bolts and vertical lightning conductors in advance, or to install conductors on the beams, so that installation can be performed efficiently. In addition, the building conductor connection member is capable of being connected to a temporary connection means. Therefore, when the building conductor connection member is temporarily installed, the building conductor connection member can be used as a part to which the temporary connection means is connected. Then, after removing the temporary connection means from the building conductor connection member, the conductor connection of the metal panel can be performed to the building conductor connection member via the panel conductor connection member. Therefore, the building conductor connection member to which the temporary connection means is connected can be used to connect the conductor of the metal panel together with the removal of the temporary connection means. Therefore, the lightning protection equipment can be installed together with the removal of the temporary connection means, so that the installation of the lightning protection equipment can be performed efficiently.

The building conductor connection member may be fixed to the joints between multiple metal panels. In this case, the building conductor connection member that is fixed to the joints between multiple metal panels and to which the temporary connection means can be connected can be used as a lightning protection device after the temporary connection means is removed.

The lightning protection equipment described above may be provided with a cover that covers the panel conductor connection member. In this case, it is possible to hide the panel conductor connection member with the cover. This can improve the design of the lightning protection equipment, and the panel conductor connection member and the building conductor connection member can be protected by the cover.

The method for installing a lightning protection equipment according to the present disclosure is a method for installing a lightning protection equipment on a building, comprising the steps of: connecting a panel conductor connecting member to a metal panel; and connecting the panel conductor connecting member and the building to each other via a building conductor connecting member that is arranged in a position facing an end face of the metal panel and to which a temporary connecting means can be connected, wherein the metal panel is an exterior wall panel that is fixed to a conductive base material of the building, and the lightning protection equipment is made of a conductive member and fixed to joints between a plurality of metal panels, and forms a conductive path to the base material with the metal panel and the lightning protection equipment as lightning receiving parts, wherein the panel conductor connecting member comprises a first connecting member and a second connecting member, the first connecting member is electrically connected to a main surface of the metal panel, the building conductor connecting member has an anchor nut that is arranged in a position facing the end face of the metal panel and is electrically connected to the base material, the first connecting member is tightened and fixed to the anchor nut via the second connecting member, and the temporary connecting means having a predetermined anchor is connected to the building conductor connecting member by the connection between the anchor and the anchor nut .

In this method of installing a lightning protection system, a panel conductor connection member is connected to the metal panel, and a building conductor connection member is connected to the panel conductor connection member and the building. Thus, the lightning current received by the metal panel can be conducted to the building via the panel conductor connection member and the building conductor connection member. The building conductor connection member is disposed at a position facing the end face of the metal panel, and the panel conductor connection member is conductor-connected to the building at this position. Therefore, the panel conductor connection member can be conductor-connected to the building using the building conductor connection member disposed at a position facing the end face of the panel, so installation can be performed efficiently. The building conductor connection member is capable of connecting a temporary connection means. Therefore, after removing the temporary connection means from the building conductor connection member to which the temporary connection means was connected, the panel conductor connection member can be conductor-connected to the building conductor connection member. Therefore, the lightning protection system can be installed by removing the temporary connection means from the building conductor connection member, so installation of the lightning protection system can be performed efficiently.

This disclosure allows for efficient installation.

1 is a side view of a building showing an example of a state in which a lightning protection system according to an embodiment is installed on a building. 2 is a cross-sectional view showing an example of a joint structure of metal panels constituting the building of FIG. 1. FIG. 2 is a cross-sectional view showing a lightning protection system according to an embodiment. FIG. 2 is a cross-sectional view showing a lightning protection system according to an embodiment. FIG. 2 is a side view of a building showing a metal panel of the building and a building conductor connection member according to an embodiment. FIG. 6 is a perspective view showing a schematic example of a temporary connection means connected to the building conductor connecting member of FIG. 5 . FIG. 11 is a cross-sectional view showing a lightning protection facility according to a modified example. FIG. 4 is a cross-sectional view showing a lightning protection system according to a comparative example.

Below, an embodiment of the lightning protection equipment and the method of installing the lightning protection equipment according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicated descriptions will be omitted as appropriate. In addition, the drawings may be partially simplified or exaggerated to facilitate understanding (for example, a portion located at the back of a cross section may be shown with a solid line rather than a dashed line for clarity), and the dimensional ratios and the like are not limited to those shown in the drawings.

In this disclosure, "lightning protection equipment" refers to equipment installed on a building that transmits lightning current caused by a lightning strike to the building. "Building" refers to a structure fixed to the ground. "Metal panel" refers to a panel that is conductive, and at least a portion of which is made of metal. "Panel" refers to a plate-shaped building material. "Panel" has a main surface and an end surface. "Main surface" refers to the panel surface (e.g., the surface that has the largest area among the surfaces that make up the panel), and "end surface" refers to a surface that intersects with the main surface.

A panel conductor connection member is connected to the metal panel. The "panel conductor connection member" refers to a conductive member that is connected to the metal panel and is electrically connected to the metal panel. A building conductor connection member is connected to the panel conductor connection member. The "building conductor connection member" refers to a member that is electrically connected to the building and is composed of a conductor. A temporary connection means can be connected to the building conductor connection member. The "temporary connection means" refers to a member or equipment that is installed when the panel conductor connection member is not connected, such as a member or equipment that is installed temporarily (for example, during construction). The "state in which the panel conductor connection member is not connected" refers to, for example, a state before the panel conductor connection member is connected, or a state in which the connected panel conductor connection member is removed (for example, a state in which the panel conductor connection member is once connected and then removed due to exterior wall repairs, etc.). As an example, the "temporary connection means" refers to scaffolding installed during construction (scaffolding anchor 51, which will be described later as a specific example).

Figure 1 is a side view showing a lightning protection equipment 10 according to this embodiment. As an example, the lightning protection equipment 10 is installed on the wall 2 of a building 1. For example, the lightning protection equipment 10 protects the wall 2 (side surface) of the building 1 from lightning strikes. For example, a plurality of metal panels 3 are provided on the wall 2, and the lightning protection equipment 10 is installed while connected to the metal panels 3. In this embodiment, the metal panels 3 and the lightning protection equipment 10 are used as a lightning receiving section to protect the building 1 from side lightning.

In this embodiment, a plurality of metal panels 3 are arranged along a first direction D1, and a plurality of metal panels 3 are arranged along a second direction D2 intersecting the first direction D1. For example, the second direction D2 is a direction perpendicular to the first direction D1. As an example, the first direction D1 is a vertical direction, and the second direction D2 is a horizontal direction. Joints 4 are formed between the plurality of metal panels 3. For example, the building 1 has joints 4 extending along the first direction D1 and joints 4 extending along the second direction D2. The lightning protection equipment 10 according to this embodiment is installed in the joints 4.

The multiple metal panels 3 arranged along the first direction D1 are connected to each other via connection parts 5 extending along the second direction D2, for example. FIG. 2 shows a cross-sectional view of the connection parts 5 obtained by cutting the metal panel 3 at a plane extending along the first direction D1 and the third direction D3, which is the thickness direction of the metal panel 3. The third direction D3 is a direction that intersects (as an example, perpendicular to) both the first direction D1 and the second direction D2. For example, the connection parts 5 include a first connection part 6 located at the upper end of the metal panel 3 and a second connection part 7 located at the lower end of the metal panel 3, and the first connection part 6 and the second connection part 7 are connected to each other to connect the pair of metal panels 3.

As an example, the first connection portion 6 has multiple protrusions 6b and multiple recesses 6c, and the second connection portion 7 has multiple protrusions 7b and multiple recesses 7c. For example, the protrusions 6b and recesses 6c are alternately arranged along the third direction D3, and the protrusions 7b and recesses 7c are alternately arranged along the third direction D3. With the protrusions 6b inserted into the recesses 7c and the protrusions 7b inserted into the recesses 6c, a pair of metal panels 3 arranged along the first direction D1 are connected to each other. For example, a sealant S is interposed between at least one protrusion 6b and recess 7c. As an example, the sealant S is a waterproof packing.

A base material 8 of the building 1 is provided on the indoor side of the building 1 as viewed from the metal panel 3, and the metal panel 3 is fixed to the base material 8 with a screw 9. As an example, the base material 8 is a furring strip of the building 1. A recess 6d recessed in the first direction D1 and the third direction D3 is formed at the bottom of the protruding portion 6b of the metal panel 3, and a screw 9 is fixed in the recess 6d. The screw 9 driven into the metal panel 3 at the recess 6d penetrates the metal panel 3 and the base material 8 in the third direction D3. A gasket 9b is interposed between the screw 9 and the recess 6d.

The metal panel 3 is, for example, a sandwich panel. The metal panel 3 has metal plates 3b and 3c aligned along the thickness direction of the metal panel 3, and a heat insulating material 3d sandwiched between the metal plates 3b and 3c. For example, the metal plates 3b and 3c are both made of iron. For example, the thickness of the metal plates 3b and 3c is 5 mm or more. The metal panel 3 has a pair of main surfaces 3f extending in the first direction D1 and the second direction D2 and aligned along the third direction D3.

3 is a cross-sectional view of the lightning protection equipment 10 cut along a plane extending in the second direction D2 and the third direction D3. As shown in FIG. 1 and FIG. 3, the lightning protection equipment 10 is installed, for example, between the end faces 3g of a plurality of metal panels 3. As an example, the lightning protection equipment 10 is installed in a joint 4 formed between a pair of metal panels 3 arranged along the second direction D2. The lightning protection equipment 10 includes a panel conductor connection member 11 connected to the metal panel 3, and a building conductor connection member 20 connecting the panel conductor connection member 11 and the building 1 (for example, the base material 8) to each other. The lightning protection equipment 10 may include a metal panel 3 in addition to the panel conductor connection member 11 and the building conductor connection member 20. Furthermore, the lightning protection equipment 10 may include, for example, a metal cover 30 and a caulking agent 40 that cover the panel conductor connection member 11.

For example, the material of the panel conductor connection member 11 is the same as the material of the metal plates 3b, 3c of the metal panel 3 (iron, as an example). The material of the building conductor connection member 20 may be the same as the material of the metal plates 3b, 3c. The material of the cover 30 may be the same as the material of the metal plates 3b, 3c. In this way, when the material of at least a part of the lightning protection equipment 10 is the same as the material of the metal plates 3b, 3c, the occurrence of defects due to thermal expansion, etc. can be more reliably avoided. However, the materials of the panel conductor connection member 11, the building conductor connection member 20, and the cover 30 may be conductive, and are not particularly limited.

The panel conductor connection member 11 includes, for example, a first connection member 12 that electrically connects the multiple metal panels 3 to each other, and a second connection member 13 that connects the first connection member 12 and the building conductor connection member 20 to each other. The first connection member 12 includes, for example, a first plate portion 14 that contacts the main surface 3f of the metal panel 3, and a second plate portion 15 that protrudes from the first plate portion 14 in an out-of-plane direction of the main surface 3f (for example, the third direction D3).

The first plate portion 14 has, for example, a rectangular shape extending along the first direction D1 and the second direction D2. FIG. 4 is a cross-sectional view of the lightning protection equipment 10 cut along the first direction D1 and the third direction D3. As shown in FIGS. 3 and 4, the second plate portion 15 protrudes from each of the four sides 14b of the rectangular first plate portion 14. The first connection member 12 has, for example, a rectangular box shape with the first plate portion 14 as the bottom and each of the multiple second plate portions 15 as the side portions. In this case, the first plate portion 14 has a bottom surface 14c, and the second plate portion 15 has an inner surface 15b extending from the outer edge of the bottom surface 14c. The first plate portion 14 has a through hole 14f through which the bolt 17 of the second connection member 13 described later is inserted.

The second plate portion 15 is a portion that connects the cover 30 to the panel conductor connection member 11. The first connection member 12 has, for example, four second plate portions 15. Of the four second plate portions 15, the second plate portion 15 that faces vertically downward has a hole 15c that penetrates the second plate portion 15. The hole 15c functions as a drainage hole for the lightning protection equipment 10. For example, the second plate portion 15 has multiple holes 15c (two as an example). In this case, even if any of the multiple holes 15c is clogged, rainwater W and the like can be drained downward through the other holes 15c.

The first connection member 12 is fixed to each of the multiple metal panels 3 by, for example, screws 16 driven into the first plate portion 14. For example, one of the multiple screws 16 is driven into the first plate portion 14 and one metal panel 3, and the other of the multiple screws 16 is driven into the first plate portion 14 and the other metal panel 3, thereby connecting the multiple metal panels 3 to each other via the panel conductor connection member 11. The first plate portion 14 has screw holes 14d into which the screws 16 are driven, and the shape of the screw holes 14d (when viewed along the third direction D3) is, for example, circular.

The second connection member 13 has a bolt 17 that passes through the first plate portion 14 of the first connection member 12 and is fastened to the building conductor connection member 20, and a nut 18 to which the bolt 17 is fastened on the bottom surface 14c on the opposite side of the building conductor connection member 20 from the first plate portion 14. As described above, in the lightning protection equipment 10, the lightning current from the metal cover 30 is transmitted to the building conductor connection member 20 via the first connection member 12 (the second plate portion 15 and the first plate portion 14) and the second connection member 13.

The cover 30 is, for example, a decorative cover. The cover 30 has, for example, an exposed portion 31 that is exposed to the outside of the building 1, and a non-exposed portion 32 that is not exposed to the outside of the building 1. As an example, both the exposed portion 31 and the non-exposed portion 32 are plate-shaped. The exposed portion 31 is, for example, rectangular plate-shaped. The exposed portion 31 has an outer surface 31b that faces the outside of the building 1, and an inner surface 31c that faces the opposite side to the outer surface 31b.

The non-exposed portion 32 is, for example, inserted into the panel conductor connection member 11 (first connection member 12), and the exposed portion 31 is placed on the end face 15d of the second plate portion 15 (the end face 15d of the second plate portion 15 located on the opposite side to the first plate portion 14). This causes the first connection member 12 to be sealed by the cover 30. In other words, the cover 30 functions as a lid that seals the panel conductor connection member 11 (first connection member 12).

As an example, the non-exposed portion 32 has a plurality of wall portions 32b that protrude from the inner surface 31c of the exposed portion 31 in a direction out of the plane of the inner surface 31c. For example, the cover 30 is disposed in a position where the non-exposed portion 32 faces the inner surface 15b of the second plate portion 15. In this embodiment, the non-exposed portion 32 faces each second plate portion 15. For example, the panel conductor connection member 11 and the cover 30 are fixed to each other by a screw 33 that is driven from the outside of the panel conductor connection member 11. The screw 33 is driven, for example, from the outer surface 15f of the second plate portion 15 into the second plate portion 15 and the non-exposed portion 32. The second plate portion 15 has a screw hole 15g into which the screw 33 is driven, and the screw hole 15g has a circular shape, for example.

The caulking agent 40 is filled, for example, in the region R defined by the cover 30, the panel conductor connection member 11 (second plate portion 15), and the metal panel 3. As an example, the region R is defined by the inner surface 31c of the exposed portion 31, the outer surface 15f of the second plate portion 15, and the metal plate 3b. For example, the caulking agent 40 is filled on both sides in the second direction D2 as viewed from the panel conductor connection member 11, and on one side (upper side) in the first direction D1.

This ensures waterproofing of the panel conductor connection member 11 in the upward and left-right directions. Furthermore, it is possible to eliminate the need for waterproofing measures for screw hole 14d into which screw 16 is driven and screw hole 15g into which screw 33 is driven. Caulking agent 40 is not filled on the other side (lower side) of the first direction D1. Since caulking agent 40 is not filled on the lower side of the cover 30, hole 15c is exposed downward, allowing rainwater W and the like to be drained from below the panel conductor connection member 11.

The building conductor connection member 20 is disposed in a position facing the end face 3g of the metal panel 3. For example, the end face 3g of the metal panel 3 and the building conductor connection member 20 are aligned along the second direction D2. As an example, the building conductor connection member 20 is disposed between the end faces 3g of a pair of metal panels 3. The building conductor connection member 20 electrically connects the panel conductor connection member 11 and the building 1 (e.g., the base material 8) to each other. For example, the building conductor connection member 20 is fixed to the building 1 in advance before the panel conductor connection member 11 is connected.

Figure 5 is a front view of the building conductor connection member 20 when the building conductor connection member 20 is viewed along the third direction D3, which is the thickness direction of the metal panel 3. As shown in Figures 3 and 5, the building conductor connection member 20 is fixed to the joint 4, for example. The building conductor connection member 20 includes a base 21 fixed to the base material 8, for example, and an anchor connection portion 22 formed on the base 21. The base 21 is, for example, plate-shaped. The building conductor connection member 20 is, for example, a scaffolding tie anchor fitting. In this case, a simple scaffolding tie anchor fitting can be used as the building conductor connection member 20, so that the structure of the building conductor connection member 20 can be simplified. The building conductor connection member 20 is connected to the building 1 by driving a screw 23 into the base 21 and the base material 8. As an example, the base 21 is rectangular plate-shaped and is arranged so that the long side of the base 21 is aligned along the extension direction of the joint 4 (for example, the first direction D1).

As an example, the anchor connection portion 22 is disposed between the multiple screws 23. The anchor connection portion 22 is, for example, an anchor nut having a tubular shape (for example, a cylindrical shape) that protrudes from the base 21. The bolt 17 of the panel conductor connection member 11 (second connection member 13) is fastened to the anchor connection portion 22 when the lightning protection equipment 10 is installed.

However, before the lightning protection equipment 10 is installed, a scaffold anchor 51 of a scaffolding fixture 50 that is fixed to the scaffolding A is connected to the anchor connection portion 22 of the building conductor connection member 20 as a temporary connection means. FIG. 6 is a perspective view that shows a state in which a scaffolding anchor 51, which is an example of a temporary connection means, is connected to the building conductor connection member 20 (anchor connection portion 22). As shown in FIG. 6, the scaffolding fixture 50 includes, for example, a scaffolding anchor 51 that is connected to the anchor connection portion 22, a pipe clamp 52 that is fastened and fixed to the scaffolding pipe P of the scaffolding A, and a connecting member 53 that connects the scaffolding anchor 51 and the pipe clamp 52 to each other.

The scaffolding anchor 51 is fixed to the connecting member 53 and protrudes from the connecting member 53. The connecting member 53 includes a connector 53b and a connecting bolt 53c that extends from the connector 53b and is connected to the pipe clamp 52. For example, the connecting bolt 53c can be screwed into the connector 53b, and the degree to which the connecting bolt 53c is screwed into the connector 53b (the screwing depth) can be adjusted to adjust the distance between the anchor connection part 22 and the scaffolding A.

As described above, a temporary connection means can be connected to the building conductor connection member 20 (anchor connection portion 22) of the lightning protection equipment 10. In this embodiment, when scaffolding A is assembled to construct the building 1, the building conductor connection member 20 can be connected to the scaffolding anchor 51 and the building conductor connection member 20 can be used as a scaffolding connection portion. Then, when the construction of the building 1 progresses and the scaffolding A is dismantled, the scaffolding anchor 51 can be removed from the building conductor connection member 20 and the lightning protection equipment 10 can be installed on the building conductor connection member 20. The installation method of the lightning protection equipment 10 according to this embodiment will be described below.

First, the building conductor connection member 20 is fixed to the building 1 (underlayment 8) (step of fixing the building conductor connection member to the building). At this time, the building conductor connection member 20 is fixed to the underlayment 8 by driving screws 23 into the base 21 of the building conductor connection member 20 and into the underlayment 8. For example, multiple screws 23 are driven into one side (the upper side as an example) and the other side (the lower side as an example) of the base 21 when viewed from the anchor connection portion 22.

Next, scaffolding A is constructed (a process for constructing a temporary connection means). As a specific example, multiple scaffolding pipes P are erected to construct scaffolding A, and the pipe clamps 52 of the scaffolding fixtures 50 are fixed to the scaffolding pipes P. Then, the scaffolding anchors 51 are connected to the building conductor connection members 20 (a process for connecting temporary connection means to the building conductor connection members). At this time, the degree to which the connecting bolts 53c are screwed into the connectors 53b is adjusted to adjust the distance between the building conductor connection members 20 and the scaffolding A.

Then, the scaffolding A is dismantled (the process of removing the temporary connection means). At this time, the scaffolding pipe P of the scaffolding A is removed, and the scaffolding anchor 51 is removed from the building conductor connection member 20 as shown in FIG. 5 (the process of removing the temporary connection means from the building conductor connection member). After the scaffolding anchor 51 is removed from the building conductor connection member 20, the lightning protection equipment 10 is installed on the building conductor connection member 20.

When installing the lightning protection equipment 10, for example as shown in Figures 3 and 4, the panel conductor connection member 11 is connected to the metal panel 3 (process of connecting the panel conductor connection member). Specifically, the first connection member 12 (first plate portion 14) is placed on each metal plate 3b of the pair of metal panels 3. At this time, the hole 15c of the second plate portion 15 is oriented vertically downward. Then, the panel conductor connection member 11 is fixed to the metal panel 3 by driving the screw 16 into the first plate portion 14 and the metal panel 3 (metal plate 3b) (process of fixing the panel conductor connection member to the metal panel).

Next, the panel conductor connection member 11 and the building 1 are connected to each other via the building conductor connection member 20 (the process of connecting the panel conductor connection member and the building to each other). For example, the first connection member 12 of the panel conductor connection member 11 is connected to the building conductor connection member 20 via the second connection member 13. Specifically, the second connection member 13 is fastened to the first connection member 12 by passing the bolt 17 of the second connection member 13 through the through hole 14f of the first connection member 12 (first plate portion 14) and tightening the nut 18 on the bolt 17. This completes the connection of the panel conductor connection member 11 to the building 1 (underlayment 8) via the building conductor connection member 20.

After connecting the panel conductor connection member 11, for example, a cover 30 is installed (cover installation process). Specifically, the non-exposed portion 32 of the cover 30 is inserted into the first connection member 12 (the area surrounded by the multiple second plate portions 15), and the inner surface 31c of the exposed portion 31 is brought into contact with the end surface 15d of the second plate portion 15. Then, the non-exposed portion 32 of the cover 30 is made to face the inner surface 15b of the second plate portion 15, and screws 33 are driven from the outer surface 15f of the second plate portion 15 into the second plate portion 15 and the non-exposed portion 32.

After the screws 33 are driven in to fix the second plate portion 15 to the non-exposed portion 32 and the cover 30 is fixed to the panel conductor connection member 11, the caulking agent 40 is filled (step of filling caulking agent). For example, the caulking agent 40 is filled in the outer region R of the second plate portion 15 facing upward or to the left and right, and the caulking agent 40 is not filled in the outer side of the second plate portion 15 where the hole 15c facing downward is formed. Through the above steps, the lightning protection equipment 10 is completed, and the series of steps in the method of installing the lightning protection equipment 10 is completed.

Next, the effects obtained from the lightning protection equipment 10 and the installation method of the lightning protection equipment according to this embodiment will be described. The lightning protection equipment 10 and the installation method of the lightning protection equipment according to this embodiment include a panel conductor connection member 11 that is connected to the metal panel 3, and a building conductor connection member 20 that connects the panel conductor connection member 11 and the building 1 to each other. Therefore, the lightning current received by the metal panel 3 can be conducted to the building 1 via the panel conductor connection member 11 and the building conductor connection member 20.

The panel conductor connection member 11 is connected to the metal panel 3, and the building conductor connection member 20 conductor-connects the panel conductor connection member 11 to the building 1 at a position facing the end face 3g of the metal panel 3. Therefore, the lightning protection equipment 10 can be installed efficiently because the panel conductor connection member 11 can be conductor-connected to the building 1 via the building conductor connection member 20 arranged at a position facing the end face 3g of the metal panel 3.

In this embodiment, the panel conductor connection member 11 and the building conductor connection member 20 form a conductive path that bypasses the end face 3g of the metal panel 3 and is connected to the building 1. Therefore, by using the building conductor connection member 20 arranged in a position opposite the end face 3g of the metal panel 3, it is no longer necessary to prepare a PC board with a lightning protection means or install a conductor in the beam as in the conventional method, and installation can be performed efficiently.

Now, a lightning protection system 100 according to a comparative example will be described with reference to FIG. 8. The lightning protection system 100 differs from the lightning protection system 10 described above in that it includes an inter-panel connection member 101 instead of the panel conductor connection member 11 and the building conductor connection member 20, that the metal panel 3 is processed, and that it includes a connection member 102 that connects the building 1 and the metal panel 3 to each other.

As shown in FIG. 8, the inter-panel connection member 101 is U-shaped and is conductively connected to the base material 8 by driving a screw 101c into the bottom surface 101b of the U-shape. A sealant 101d is applied to the front side (upper side in FIG. 8) of the metal panel 3 in the inter-panel connection member 101. The connection member 102 includes a first metal member 103 that penetrates the metal panel 3 and is L-shaped, and a second metal member 104 that extends from the first metal member 103 to the building 1 (base material 8).

The first metal fitting 103 has an exposed portion 103b that is exposed at the metal panel 3, and an extension portion 103c that extends from the exposed portion 103b through the metal panel 3 to the inside of the building 1 at the metal panel 3. The exposed portion 103b is fixed to the metal panel 3 with two screws 103d and two rivet nuts 103f.

The second metal fitting 104 has a first terminal 104b connected to the first metal fitting 103, a first extension portion 104c extending from the first terminal 104b to the inside of the building 1, a second extension portion 104d extending from the first extension portion 104c toward the base material 8, and a second terminal 104f that fixes the second extension portion 104d to the base material 8. The first extension portion 104c and the second extension portion 104d are made of aluminum, for example.

In the above lightning protection equipment 100, the first metal fitting 103 must be inserted into the metal panel 3 in the connection member 102 that connects the metal panel 3 and the building 1. Then, the first metal fitting 103 must be fixed to the metal panel 3, and the second metal fitting 104 must be fixed to the building 1. Each step requires fixing the second metal fitting 104 to the base material 8, connecting the terminals, and driving in screws. Therefore, since the metal panel 3 must be processed, the work becomes complicated.

In contrast, in the lightning protection equipment 10 and the method for installing the lightning protection equipment according to this embodiment, as shown in FIG. 3, the installation of the lightning protection equipment 10 can be completed simply by connecting the panel conductor connection member 11, which is conductor-connected to the metal panel 3, to the building conductor connection member 20, which is disposed in a position facing the end face 3g of the metal panel 3 and previously connected to the building 1. Therefore, in the lightning protection equipment 10 and the method for installing the lightning protection equipment according to this embodiment, the lightning protection equipment 10 can be installed much more efficiently than in the comparative example described above.

The building conductor connection member 20 is also connectable to a temporary connection means. Therefore, the building conductor connection member 20 can be used as a part to which the temporary connection means is connected when it is temporarily installed. Then, after removing the temporary connection means and detaching the temporary connection means from the building conductor connection member 20, the conductor connection of the metal panel 3 to the building conductor connection member 20 can be performed via the panel conductor connection member 11. As a specific example, the building conductor connection member 20 is connectable to a scaffolding anchor 51. Therefore, when the scaffolding A is set up in the construction of the building 1, the building conductor connection member 20 can be used as a part to which the scaffolding anchor 51 is connected. Then, after dismantling the scaffolding A and detaching the scaffolding anchor 51 from the building conductor connection member 20, the conductor connection of the metal panel 3 to the building conductor connection member 20 can be performed via the panel conductor connection member 11. Therefore, the building conductor connection member 20 to which the temporary connection means is connected can be used for the conductor connection of the metal panel 3 together with the removal of the temporary connection means. Therefore, the lightning protection equipment 10 can be installed at the same time as the temporary connection means is dismantled, so the lightning protection equipment 10 can be installed efficiently.

As described above, the building conductor connection member 20 may be fixed to the joints 4 between the multiple metal panels 3. In this case, the building conductor connection member 20 that is fixed to the joints 4 between the multiple metal panels 3 and to which the temporary connection means can be connected can be effectively used as the lightning protection equipment 10 after the temporary connection means is dismantled. In this embodiment, the building conductor connection member 20 that was one of the scaffolding equipment can be used as the lightning protection equipment 10 after the scaffolding A is dismantled.

The lightning protection equipment 10 described above may include a cover 30 that covers the panel conductor connection member 11. In this case, it is possible to hide the panel conductor connection member 11 with the cover 30. This improves the design of the lightning protection equipment 10, and also protects the panel conductor connection member 11 and the building conductor connection member 20 with the cover 30.

The lightning protection equipment 10 and the method for installing the lightning protection equipment according to this embodiment have been described above. However, the lightning protection equipment and the method for installing the lightning protection equipment according to the present disclosure are not limited to the contents of the above-mentioned embodiment. Below, a lightning protection equipment 60 and the method for installing the lightning protection equipment according to a modified example will be described with reference to FIG. 7. As shown in FIG. 7, the lightning protection equipment 60 according to the modified example differs from the above-mentioned lightning protection equipment 10 in that it does not have a cover 30 and a caulking agent 40. A part of the configuration of the lightning protection equipment 60 is the same as a part of the configuration of the lightning protection equipment 10. Therefore, in the following description, descriptions that overlap with the description of the lightning protection equipment 10 described above will be omitted as appropriate.

The lightning protection equipment 60 comprises a panel conductor connection member 61 having a different configuration from the panel conductor connection member 11, a building conductor connection member 20, and a sealing material 70 filled between the multiple metal panels 3. The panel conductor connection member 61 comprises a first connection member 62 and a second connection member 13 that electrically connect the multiple metal panels 3 to each other. The first connection member 62 comprises a plate-shaped member 63 that contacts the main surface 3f of the metal panel 3. Screws 64 are driven into the plate-shaped member 63 and the metal panel 3.

The plate-like member 63 has a contact surface 63b that contacts each of the multiple metal panels 3, and an exposed surface 63c that faces the opposite side to the contact surface 63b. A through hole 63d is formed in the plate-like member 63, through which the bolt 17 of the second connection member 13 is inserted. The bolt 17 is passed through the through hole 63d, and the nut 18 is tightened onto the bolt 17 from above the exposed surface 63c, thereby firmly connecting the second connection member 13 to the first connection member 62. Note that, for example, a packing may be interposed between the screw 64 and the plate-like member 63, and between the nut 18 and the exposed surface 63c, respectively, to provide waterproofing.

As described above, in the lightning protection equipment 60 according to the modified example and the installation method of the lightning protection equipment 60, the lightning current received by the metal panel 3 can be conducted to the building 1 via the panel conductor connection member 61 and the building conductor connection member 20. Furthermore, since the panel conductor connection member 61 can be conductor-connected to the building 1 via the building conductor connection member 20 arranged in a position opposite the end face 3g of the metal panel 3, the installation of the lightning protection equipment 60 can be performed efficiently. Therefore, the lightning protection equipment 60 can provide the same effects as the lightning protection equipment 10 described above.

The above describes embodiments of the lightning protection equipment and the method for installing the lightning protection equipment according to the present disclosure. However, the lightning protection equipment and the method for installing the lightning protection equipment according to the present disclosure are not limited to the above-described embodiments or modifications, and may be modified as appropriate within the scope of the gist described in the claims. In other words, the configuration, shape, size, number, material, and arrangement of each part of the lightning protection equipment, as well as the content and order of the steps of the method for installing the lightning protection equipment, may be modified as appropriate within the scope of the above-described gist.

For example, in the above embodiment, an example was described in which the temporary connection means was the scaffold anchor 51 of the scaffold A. However, the temporary connection means may be a member or equipment other than the scaffold, as long as it is a member or equipment used when the panel conductor connection member 11 is not connected. In addition, in the above embodiment, the lightning protection equipment 10 installed in the joint 4 formed between a pair of metal panels 3 was described. However, the lightning protection equipment according to the present disclosure may be installed at a position other than between the pair of metal panels. For example, the lightning protection equipment according to the present disclosure may be installed at an intersection between the joint 4 extending in the first direction D1 and the joint 4 extending in the second direction D2 between four metal panels 3. For example, the lightning protection equipment according to the present disclosure may be installed on the end surface 3g (only the end surface 3g on one side of the metal panel 3) on the end side in the second direction D2 of the metal panel 3 located at the end of the second direction D2. In this way, the location where the lightning protection equipment according to the present disclosure is installed is not limited to the above embodiment and can be changed as appropriate.

For example, in the above embodiment, a panel conductor connecting member 11 was described in which the first plate portion 14 has a circular screw hole 14d and the second plate portion 15 has a circular screw hole 15g. However, the shape of the screw hole of the panel conductor connecting member may be, for example, elliptical. In this way, the shape of the screw hole of the panel conductor connecting member can be changed as appropriate.

For example, in the above embodiment, the second plate portion 15 protrudes from each of the four sides 14b of the rectangular first plate portion 14, and the panel conductor connection member 11 is described, which includes a rectangular box-shaped first connection member 12 with the first plate portion 14 as its bottom and each of the multiple second plate portions 15 as its side portions. However, the panel conductor connection member may include a first connection member in which the second plate portion 15 protrudes from one or more and three or less sides 14b of the first plate portion 14, or may include a first connection member having a shape other than a rectangular box shape. The configuration of the second connection member of the panel conductor connection member is not limited to the above-mentioned second connection member 13, and can be changed as appropriate. Furthermore, the panel conductor connection member is not limited to the configuration including the first connection member 12 and the second connection member 13, and may be composed of one member or three or more members. In this way, the shape, configuration, and arrangement of the panel conductor connection member can be changed as appropriate.

For example, in the above embodiment, a building conductor connecting member 20 was described that includes a rectangular plate-shaped base 21 and a cylindrical anchor connecting portion 22 protruding from the base 21, and is fixed to the joint 4 with a plurality of screws 23. However, the shape of the base and the shape of the anchor connecting portion are not limited to the base 21 and the anchor connecting portion 22, and can be changed as appropriate. In addition, the manner in which the building conductor connecting member is fixed to the joint is not limited to fixing with the screws 23, and can be changed as appropriate. Furthermore, the portion to which the building conductor connecting member is fixed may be a portion other than the joint. In this way, the configuration and arrangement of the building conductor connecting member can be changed as appropriate.

1...building, 2...wall, 3...metal panel, 3b, 3c...metal plate, 3d...insulating material, 3f...main surface, 3g...end surface, 4...joint, 5...connection portion, 6...first connection portion, 6b...protrusion, 6c...recess, 6d...recess, 7...second connection portion, 7b...protrusion, 7c...recess, 8...base material, 9...screw, 9b...gasket, 10, 60...lightning protection equipment, 11, 61...panel conductor connection member, 12, 62...first connection member, 13...second connection member, 14...first plate portion, 14b...edge, 14c...bottom surface, 14d...screw hole, 14f...through hole, 15...second plate portion, 15b...inner surface, 15c...hole, 15d...end surface, 15f...outer surface, 15g...screw hole, 16...screw, 17...bolt , 18...nut, 20...building conductor connection member, 21...base, 22...anchor connection part, 23...screw, 30...cover, 31...exposed part, 31b...outer surface, 31c...inner surface, 32...non-exposed part, 32b...wall part, 33...screw, 40...caulking agent, 50...scaffolding fixing device, 51...scaffolding anchor (temporary connection means), 52...pipe clamp, 53...connecting member, 53b...connecting device, 53c...connecting bolt, 63...plate-shaped member, 63b...contact surface, 63c...exposed surface, 63d...through hole, 64...screw, 70...sealing material, A...scaffolding, D1...first direction, D2...second direction, D3...third direction, P...scaffolding pipe, R...area, S...sealing material, W...rainwater.

Claims (4)

A lightning protection system installed on a building, comprising:
a panel conductor connecting member to be connected to the metal panel;
a temporary connection means is connectable to the end surface of the metal panel at a position facing the end surface of the metal panel;
a building conductor connection member connecting the panel conductor connection member and the building to each other;
Equipped with
The metal panel is an exterior wall panel fixed to a conductive base material of the building,
The lightning protection equipment is made of a conductive member and is fixed to the joints between the plurality of metal panels,
A lightning protection system in which the metal panel and the lightning protection system are used as lightning receiving parts to form a conductive path to the base material,
The panel conductor connecting member comprises a first connecting member and a second connecting member,
the first connection member is electrically connected to a main surface of the metal panel;
The building conductor connection member has an anchor nut arranged at a position facing the end surface of the metal panel and is electrically connected to the base material,
The first connecting member is fastened to the anchor nut via the second connecting member,
the temporary connection means having a predetermined anchor is connected to the building conductor connection member by connecting the anchor to the anchor nut;
Lightning protection equipment. The building conductor connection member is fixed to the joints between the plurality of metal panels.
The lightning protection system according to claim 1. A cover is provided to cover the panel conductor connecting member.
The lightning protection system according to claim 1 or 2. A method for installing lightning protection equipment on a building, comprising the steps of:
connecting a panel conductor connecting member to a metal panel;
a step of connecting the panel conductor connection member and the building to each other via a building conductor connection member that is disposed at a position facing an end face of the metal panel and to which a temporary connection means can be connected;
Equipped with
The metal panel is an exterior wall panel fixed to a conductive base material of the building,
The lightning protection equipment is made of a conductive member and is fixed to the joints between the plurality of metal panels,
A lightning protection system in which the metal panel and the lightning protection system are used as lightning receiving parts to form a conductive path to the base material,
The panel conductor connecting member comprises a first connecting member and a second connecting member,
the first connection member is electrically connected to a main surface of the metal panel;
The building conductor connection member has an anchor nut arranged at a position facing the end surface of the metal panel and is electrically connected to the base material,
The first connecting member is fastened to the anchor nut via the second connecting member,
the temporary connection means having a predetermined anchor is connected to the building conductor connection member by connecting the anchor to the anchor nut;
Installation method.

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