JP4632408B2 - Sidewall lightning protection mechanism in existing buildings - Google Patents

Description

  The present invention relates to a side wall lightning protection mechanism in an existing building.

  There is JIS A4201: 1992 (lightning protection equipment for buildings, etc.) as a conventional standard for lightning protection equipment for buildings, etc., and this standard does not stipulate protection against side wall lightning. It was revised on the 8th in accordance with IEC61024-1 (Lightning protection for buildings), and revised JIS A4201: 2003 provides protection against side wall lightning. On the other hand, lightning protection equipment according to the Building Standards Law is required to be installed by JIS, but at present, installation by JIS A4201: 1992 is permitted according to the notification of the former Ministry of Construction.

  Since JIS A4201: 1992 does not stipulate protection against side wall lightning, at present, many high-rise buildings exceeding 60m (20m at the highest protection level) do not have side wall lightning protection. However, in a building where the conductor is not exposed on the surface, such as a tiled PC board, damages such as a part of the side wall portion being destroyed and falling due to a lightning strike on the side wall have occurred.

  In order to prevent the occurrence of such damage due to side wall lightning, if JIS A4201: 2003 is applied in the future, the side wall surface will be protected from lightning strikes for buildings exceeding 60m (20m at the highest protection level). Therefore, it is necessary to provide a protection mechanism for promptly flowing a lightning current to the ground when a lightning strike is applied to the side wall.

  On the other hand, as conventional examples of lightning protection equipment in buildings, there are those described in Patent Documents 1 to 4, for example. Patent Documents 1 to 3 disclose a protection mechanism configured to install a lightning conductor on a roof of a building over a predetermined length, and do not mention protection from side wall lightning. On the other hand, Patent Document 4 discloses a mechanism for protecting the side wall portion from side wall lightning, and this protection mechanism is the same as the surface of the surface layer plate on the side surface of the surface layer plate attached to the side wall of the building. A vertical lightning conductor is fixed so that it becomes a surface, and the vertical lightning conductor and an anchor bolt for fixing the surface layer plate to the outer wall are electrically connected by a grounding conductor, and the surface layer plate for a high-rise part of a high-rise building Attach this surface layer plate to the outer wall of the high-rise building with anchor bolts, and connect the end of the grounding conductor that is electrically connected to the reinforcing bars or steel frames of the building in advance to the anchor bolts. Is configured.

JP-A-5-161239 JP 7-264759 A JP-A-10-219938 JP 2001-86631 A

  When constructing a protection mechanism for side wall lightning according to JIS A4201: 2003, for example, at the highest protection level, a metal mesh must be formed on the side wall with a 5 m pitch or grid, and simply a metal strip on the side wall, etc. However, it is inevitable to influence the aesthetics of the facade of the building. Therefore, there is a strong demand for a side-wall lightning protection mechanism that does not impair the aesthetics.

  In addition, when installing a lightning conductor on the side wall of a building, of course, it is important how to ground it to the earth. For example, for the purpose of protection against side lightning In the above-mentioned Patent Document 4, as described above, after attaching the surface layer plate fixing the vertical lightning conductor to the outer wall of the high-rise building with the anchor bolt, it is electrically connected to the reinforcing bar or steel frame of the building. The operation | work which connects the edge part of the conducting wire for grounding to an anchor bolt is needed. The connection work between the lightning conductor and the grounding conductor is the same for other Patent Documents 1 to 3.

  Conventionally, after performing the operation of fixing the side wall portion to the housing in this way, it is necessary to perform the operation of grounding the lightning-receiving portion conductor.

  Therefore, in order to solve such a problem, the applicant has previously proposed a side wall lightning protection mechanism in a building as shown in FIGS. (Japanese Patent Application No. 2003-423727)

  That is, this side wall lightning protection mechanism is a linear or dotted light-receiving section on the outer surface side of the outer wall unit in a building that forms the outer wall by fixing the mounting bracket of the outer wall unit to a steel frame member (not shown). A conductor is provided, and between this and the mounting bracket is connected with a connecting conductor passing through the inside of the outer wall unit. With this configuration, the lightning conductor on the outer surface side of the outer wall unit is It is grounded via a connecting conductor, a mounting bracket and a steel frame member.

  However, the above-mentioned side wall lightning protection mechanism corresponds to a new building, and cannot be applied to an existing building that does not use the outer wall unit as described above.

  Accordingly, an object of the present invention is to provide a side wall lightning protection mechanism corresponding to an existing building.

In order to solve the above-described problem, in the present invention, a linear conductor and a first T-shaped connection member provided with a connection arm portion for connecting three linear conductors on the same plane; a connection for connecting the second T-shaped connecting member provided with connection arm portions for connecting the three linear conductors on orthogonal planes, the four linear conductors on the same plane a first cross connection member provided with arms, the elements of the second cross connecting member side walls lightning protection mechanism provided with a connecting arm portions for connecting on four linear conductors orthogonal planes Mounting holes are formed on the front end side of the connection arm portion of each connection member and the front end side of the linear conductor, and anchor bolts for wall mounting are fitted in a state in which these mounting holes correspond to each other. by coupling, at the same time it connects the said line-shaped conductor and each connection member, the surface of the side wall of the existing building, from the roof side A linear conductor to Jodaka of a structure to be installed in a grid pattern, to constitute a connection to the existing grounding conductor disposed on the roof of the T-shaped connecting member to the building disposed on the roof side It proposes a side wall lightning protection mechanism in existing buildings.

According to the present invention, in the above configuration, the T-shaped connection member or the cross-shaped connection member is provided with a mounting portion for projecting the rod-shaped conductor in a direction perpendicular to the plane on which the connection arm portions are arranged. Propose to provide.

  Further, the present invention proposes that a part of the linear conductor can be expanded and contracted in the above configuration.

  In the present invention, the linear conductor, the first T-shaped connecting member that connects the three linear conductors on the same plane, and the second that connects the three linear conductors on the orthogonal plane. The T-shaped connecting member, the first cross-shaped connecting member that connects the four linear conductors on the same plane, and the second cross-shaped that connects the four linear conductors on the orthogonal plane Linear conductors can be installed in a grid pattern from the rooftop to a predetermined height on the side wall of the building from the connecting member, and grounding to the ground is provided on the T-shaped connecting member on the rooftop Since it is only necessary to connect the connecting part to the existing grounding conductor on the roof of the building, it is not necessary to install anchor bolts, etc. The side wall lightning protection mechanism can be configured easily.

  In this configuration, a grid-like linear conductor can be used as a lightning-receiving portion conductor, and if the T-shaped connection member or the cross-shaped connection member is provided with a rod-shaped conductor attachment portion, the attachment portion By projecting a rod-shaped conductor, the rod-shaped conductor can be used as a lightning conductor.

  Further, if a part of the linear conductor is configured to be able to expand and contract, the expansion and contraction due to heat can be absorbed.

Next, an embodiment of the side wall lightning protection mechanism of the present invention will be described with reference to the accompanying drawings.
First, FIG. 1 shows a state where a side wall lightning protection mechanism is constructed on the surface of a side wall of an existing building B by applying the present invention. This side wall lightning protection mechanism is partly shown by a one-dot chain line circle in the figure. It is comprised from each member which showed.

  That is, this side wall lightning protection mechanism includes a first T-shaped connection member 2 (2a, 1a, 1b, 1c) that connects the three linear conductors 1 on the same plane. 2b), the second T-shaped connecting member 3 that connects the three linear conductors 1 on an orthogonal plane, and the first cross-shaped connection that connects the four linear conductors on the same plane. From the member 4 and the second cross-shaped connecting member 5 that connects the four linear conductors on an orthogonal plane, the linear conductors 1 are arranged in a lattice pattern from the roof to the predetermined height on the surface of the side wall of the building. The grounding conductor is grounded to the existing grounding conductor 7 disposed on the roof of the building via the connecting portion of the T-shaped connecting member 6 on the roof side provided with the connecting portion. Connect and configure.

  FIG. 2 shows an example of the linear conductors 1a and 1b made of metal disposed on the flat portion of the side wall of the building B. (a) is a round bar, (b) is a square bar, and (c) is a belt. It is plate-shaped. In the drawing, the linear conductors arranged in the vertical direction are denoted by reference numeral 1a, and the linear conductors arranged in the horizontal direction are denoted by 1b, but these can be used mutually.

  FIG. 3 shows an example of a linear conductor 1c made of a metal body arranged at the corner of the side wall of the building B. The linear conductor 1c is shaped so as to wrap the corner finishing material of the building B. That is, (a) is formed in a cross-sectional L shape, and (c) is formed in a cross-sectional arc shape.

  FIG. 4 shows a stretchable linear conductor used for a part of the linear conductors 1a and 1b made of a metal body disposed on the flat portion of the side wall of the building B. In FIG. A braid 9 is connected between the metal bodies 8 so as to be stretchable. In (b), a pair of band-like metal bodies 8 are connected to each other by a long groove 10 and a screw 11 movably engaged with the long groove 10 so as to be stretchable.

  Next, FIG. 5 shows a first T-shaped connecting member positioned at the lowest side of the lattice in the first T-shaped connecting member 2 that connects the three linear conductors 1 on the same plane. This is an example of 2b. In the first T-shaped connecting member 2b, the stepped portion 13 is provided at the tip of each connecting arm portion 12 in order to arrange it on the surface of the three linear conductors 1b and 1c and the side wall on the same plane. The mounting hole 14 is formed in the step portion 13. In such a configuration, a mounting hole (not shown) corresponding to the mounting hole 14 is formed on the distal end side of the linear conductors 1a and 1b connected by the first T-shaped connecting member 2b, which will be described later. Next, by fitting anchor bolts or the like into the mounting holes formed in the linear conductors 1a and 1b from the mounting holes 14 of the stepped portion 13, and screwing the tips of the anchor bolts to the wall surface of the building, At the same time that the conductor 1 is connected by the first T-shaped connecting member 2b, these can be fixed to the wall surface of the building B. In addition, the 1st T-shaped connection member 2b can be used as the 1st T-shaped connection member 2a of a rooftop by arrange | positioning upside down.

  Next, FIG. 6 shows an example of a second T-shaped connecting member 3 that connects three linear conductors 1 on an orthogonal plane, and this second T-shaped connecting member 3 is a building B. It arrange | positions at the corner | angular part of a side wall. The second T-shaped connecting member 3 forms a connecting arm portion projecting orthogonally corresponding to the linear conductors 1b, 1b arranged on the orthogonal plane, and also corresponds to the corner portion. A connecting arm portion 12 having an L-shaped cross section is formed corresponding to the linear conductor 1c having an L-shaped cross section. And the step part 13 is provided in the front-end | tip of each connection arm part similarly to the example shown in FIG. 5, and the attachment hole 14 is provided in this step part 13. As shown in FIG.

  Next, FIG. 7 shows an example of a first cross-shaped connecting member 4 that connects four linear conductors 1 on the same plane. It arrange | positions in the plane part of a side wall. The first cross-shaped connecting member 4 has a configuration in which a connecting tube portion 15 protrudes in a cross shape on the same plane, and the linear conductors 1a and 1b are fitted and connected in the connecting tube portion 15. is there. The connection tube portion 15 is also provided with a mounting hole 14.

  Next, FIG. 8 shows an example of a second cruciform connection member 5 that connects four linear conductors 1 on an orthogonal plane. It is arranged at the corner of the side wall. The second T-shaped connecting member 3 forms connecting arm portions 12 projecting orthogonally corresponding to the linear conductors 1b, 1b arranged in the orthogonal plane in the orthogonal direction. A connecting arm portion 12 having an L-shaped cross section is formed corresponding to the linear conductors 1c, 1c having an L-shaped cross section corresponding to the portion. And the step part 13 is provided in the front-end | tip of each connection arm part 12 similarly to the example shown in FIG.

  FIG. 8 is a cross-sectional view of (b) and (c) corresponding to the arrow in the B direction and the arrow in the C direction of (a), and shows the linear conductor 1 in the second cross-shaped connecting member 5. A specific connection example is described. That is, as shown in FIG. 8, from the mounting hole 14 formed in the step portion 13 of each connecting arm portion 12 of the second cross-shaped connecting member 5 to the mounting hole 16 formed in the linear conductors 1a and 1b. By fitting the anchor bolts 17 and the like and screwing the tips of the anchor bolts 17 to the wall surface 18 of the building B, the four linear conductors 1 are connected by the second cross-shaped connecting member 5 and are simultaneously constructed. It can be fixed to the wall surface 18 of the object B.

  As described above, such a connection method can be applied to the above-described configuration and the configuration described later.

  Next, FIG. 9 shows an example of the T-shaped connecting member 6 on the roof side. This T-shaped connecting member 6 is basically the same as the first T-shaped connecting member 2 (2a, 2b). In addition to this configuration, a connection 19 to the existing grounding conductor 7 provided on the roof of the building B is provided. The connecting portion 19 may have an appropriate configuration as long as it can be connected to the existing grounding conductor 7. At this time, the existing grounding conductor 7 can be connected as it is or can be disconnected and connected. And so on. Reference numeral 20 denotes a roof parapet.

  Next, FIGS. 10 and 11 show another example of the connection mechanism of the existing grounding conductor 7 on the roof side. In this example, a pair of L-shaped linear conductors 1c are linearly connected to the corners in the lateral direction of the roof parapet 20 by the first T-shaped connecting member 2a, and a strip-shaped linear shape is used. It is set as the structure which supports the conductor 1a orthogonally. For this reason, the first T-shaped connecting member 2a has an L-shaped section corresponding to the linear conductor 1c having the L-shaped section, and a mounting hole 22 is formed in the upper surface corresponding portion 21 of the roof parapet 20. An anchor bolt 17 is driven into the roof parapet 20 through the hole 22 to fix the first T-shaped connecting member 2a. When the first T-shaped connecting member 2a is fixed to the rooftop parapet 20 in this way, as shown in FIG. 11, one end side of the connecting conductor 23 is fixed, and the other end side is used for the existing grounding. Electrical connection is made by connecting to the driving hardware 24 with bolts 25.

  In this configuration, the connecting conductor 23 can be configured as a metal rod, a flat bar, or a jumper wire or the like obtained by treating both ends with crimped terminals.

  In the embodiment described above, the grid-like linear conductors 1 (1a, 1b, 1c,...) And their connecting members 3, 4, 5, 6 are lightning-receiving conductors. If the member 3, 4, 5, 6 is provided with a rod-shaped conductor mounting portion, the rod-shaped conductor can be projected by this mounting portion, and this rod-shaped conductor can be used as a lightning-receiving portion conductor.

  FIGS. 12 and 13 show an example. In this example, a female thread portion 26 is formed on the first cross-shaped connecting member 3, and a male thread portion 28 formed on a rod-shaped conductor 27 is formed on the female thread portion 26. It is the structure attached by screwing. The first cross-shaped connecting member 3 itself in this example is different from the configuration of FIG. 7 in order to arrange the four linear conductors 1a and 1b on the same plane. In addition to projecting, a stepped portion 13 is formed at the front end thereof, and a mounting hole 14 is formed in the stepped portion 13.

  FIG. 14 shows another example. In this example, as in the previous example, the rod-shaped conductor 27 is attached to the first cross-shaped connecting member 3 by screwing the male and female screw portions. However, unlike the previous example, in order to arrange the four linear conductors 1a and 1b on the same plane, the holding arm portion 29 is projected in a cross shape, and the mounting holes 14 are formed at the tips thereof in the same manner as described above. It is the structure which formed.

  As described above, according to the present invention, the linear conductor, the first T-shaped connecting member that connects the three linear conductors on the same plane, and the three linear conductors are orthogonal to each other. A second T-shaped connecting member that connects on a plane, a first cross-shaped connecting member that connects four linear conductors on the same plane, and four linear conductors on an orthogonal plane A linear conductor can be installed in a grid pattern from the roof top to a predetermined height on the surface of the side wall of the building from the second cross-shaped connecting member to be connected. Since it is only necessary to connect the connecting part provided on the letter-shaped connecting member to the existing grounding conductor arranged on the roof of the building, construction such as installation of anchor bolts that penetrate the existing outer wall surface plate and provide grounding The side wall lightning protection mechanism can be easily configured with simple construction on the side wall of an existing building without the need for More availability is extremely high.

  In addition to the grid-shaped linear conductors being lightning-receiving conductors, if a T-shaped connecting member or a cross-shaped connecting member is provided with a rod-shaped conductor mounting portion, the mounting portion allows the rod-shaped conductor to be By projecting, this rod-shaped conductor can be used as a lightning conductor.

  On the other hand, if a part of the linear conductor is configured to be able to expand and contract, the expansion and contraction due to heat can be absorbed.

It is a perspective view which shows the state which applied the present invention and comprised the side wall lightning protection mechanism on the surface of the side wall of the existing building. It is a perspective view which shows the example of a linear conductor. It is a perspective view which shows the other example of a linear conductor. It is a perspective view which shows another example of a linear conductor. It is a perspective view which shows the example of a 1st T-shaped connection member. It is a perspective view which shows the example of a 2nd T-shaped connection member. It is a perspective view which shows the example of a 1st cross-shaped connection member. It is the perspective view and sectional drawing which show the example of the 2nd cross-shaped connection member. It is a perspective view which shows the example of the T-shaped connection member of a roof side. It is a perspective view which shows the other example of the element which comprises a connection mechanism with the existing conductor for grounding in a roof side. It is sectional drawing which shows the connection mechanism with the existing conductor for grounding on the roof side using the component of FIG. It is a perspective view which shows the example of the connection member which enabled attachment of a rod-shaped conductor. It is a perspective view of the state which attached the rod-shaped conductor to the connection member of FIG. It is a perspective view which shows the other example of the connection member which attached the rod-shaped conductor.

Explanation of symbols

1 (1a, 1b, 1c,...) Linear conductor 2 (2a, 2b,...) First T-shaped connecting member 3 Second T-shaped connecting member 4 First cross-shaped connecting member 5 Second Cross-shaped connecting member 6 Roof side T-shaped connecting member 7 Existing conductor for grounding 8 Metal body (band-like)
9 Braid 10 Long groove 11 Screw 12 Connection arm portion 13 Step portion 14 Mounting hole 15 Connection cylinder portion 16 Mounting hole 17 Anchor bolt, etc. 18 Wall surface 19 Connection portion 20 Roof parapet 21 Upper surface corresponding portion 22 Mounting hole 23 Connecting conductor 24 For grounding Driving hardware 25 Bolt 26 Female thread part 27 Bar-shaped conductor 28 Male thread part 29 Clamping arm part

Claims (3)

A first T-shaped connecting member provided with a connecting arm for connecting the linear conductor and the three linear conductors on the same plane, and the three linear conductors on an orthogonal plane a second T-shaped connecting member provided with connection arm portions for connecting a first cross connecting member provided with connection arm portions for connecting the four linear conductors on the same plane A second cross-shaped connecting member provided with a connecting arm portion for connecting four linear conductors on an orthogonal plane is used as an element of the side wall lightning protection mechanism, and the tip of the connecting arm portion of each connecting member Side and the tip end side of the linear conductor are formed with mounting holes, and by fitting anchor bolts for wall mounting in a state in which these mounting holes correspond to each other, the connecting members and the linear at the same time to connect the conductors, configured to be installed on the surface of the side wall of the existing building, a linear conductor from the roof side to a predetermined height in a grid pattern And then, the side wall lightning protection mechanism in existing buildings, characterized in that to constitute a connection to the existing grounding conductor disposed on the roof of the T-shaped connecting member to the building disposed on the roof side. 2. A T-shaped connecting member or a cross-shaped connecting member is provided with a mounting portion for projecting a rod-shaped conductor in a direction perpendicular to a plane on which the connecting arm portions are arranged. Sidewall lightning protection mechanism for existing buildings described in 1 . The side lightning protection mechanism for an existing building according to claim 1, wherein a part of the linear conductor is extendable and contractible .

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