JP2017048592A - Connection member, connection structure of lightning arrester wire, and connection method of lightning arrester wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection member, a connection structure of lightning arrester wire, and a connection method of lightning arrester wire capable of preventing explosion on a connection part of lightning arrester wire while ensuring the workability.SOLUTION: A connection member in an embodiment is a connection member 1, which is connected to a PC column 2 through which a lightning arrester wire L is laid for allowing a current from lighting to flow therealong. The connection member 1 includes conduit lines 11 and 12 through which the lightning arrester wire L is laid. The conduit line 11 extends from an opening 1b which is positioned at an upper plane 1a of the connection member 1 to an opening 1d which is positioned at a side plane 1c, and the conduit line 12 extends from an opening 1f positioned at a lower plane 1e of the connection member 1 to an opening 1g positioned at the side plane 1c.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connection member through which a lightning conductor that guides a lightning current received by a lightning rod of a building to a grounding facility, a connection structure of the lightning conductor, and a connection method of the lightning conductor.

  Japanese Patent Application Laid-Open No. 2000-299918 describes a connection structure for lightning conductors extending from a lightning rod on the roof of a building using PC pillars. A lightning conductor is embedded in the PC pillar in advance. The lightning conductor is arranged so as to extend vertically inside the PC pillar, and the upper end of the lightning conductor protrudes upward from the top of the PC pillar. Moreover, the notch part is provided in the lower end of the side surface of PC pillar, and the lower end of the lightning conductor is exposed in a state extending downward in the notch part. As the connection structure of the lightning conductor, there is described a structure in which a lightning conductor protruding upward from the top of the PC pillar and a lightning conductor extending downward at the notch are connected by a connection terminal.

JP 2000-299918 A

  In the connection structure of the lightning conductors described above, since the two lightning conductors are connected at the notch portion of the PC pillar, it is necessary to repair the plastering of the connecting parts of the two lightning conductors by filling with mortar or the like after the connection. There is room for improvement in terms of workability because it takes extra time and troublesome construction like this plasterer repair. Moreover, since the said notch part is provided in the lower end of the side surface of PC pillar, the thickness (cover) of the mortar etc. which are located in the outer side of the connection part of a lightning conductor is thin. Therefore, when a high-voltage current flows through the lightning conductor due to lightning, explosion may occur on the surface of the PC pillar or the connection portion of the lightning conductor.

  An object of the present invention is to provide a joint member, a lightning conductor connecting structure, and a lightning conductor connecting method capable of improving workability and avoiding explosion at a connection portion of the lightning conductor. And

  A splicing member according to the present invention is a splicing member connected to a pillar through which a lightning conductor conducting current from lightning passes, and includes a conduit through which the lightning conductor is passed. The member extends from an opening located on either the upper surface or the lower surface of the member to an opening located on a side surface adjacent to the upper surface and the lower surface.

  In this joint member, since the conduit through which the lightning conductor is passed extends from the opening located on one of the upper surface and the lower surface to the opening located on the side surface, the lightning conductor passed through the column has an upper surface and a lower surface. One of the openings is passed through the side opening. Thus, since the lightning conductor is passed through the opening on the side surface of the joint member, the lightning conductor can be pulled out from the opening on the side surface and connected to another lightning conductor. Therefore, neither the pillar nor the joint member is required to have a structure such as the above-described notched portion, and the plastering repair after the connection of the lightning conductor can be eliminated, so that the workability can be improved. In addition, since the lightning conductor pulled out from the opening on the side surface can be filled with slab concrete after connection, the covering thickness of the connection portion of the lightning conductor can be sufficiently secured. Therefore, it is possible to avoid a situation in which explosion occurs at the connection portion of the lightning conductor.

  Further, the above-mentioned joint member may be a precast member in which the conduit is embedded in advance. In this case, since the construction can be completed by simply connecting the lightning conductor to the other lightning conductors through the pipe line and embedding this connection portion, the workability is further improved.

  The opening located on the side surface includes a first opening and a second opening, and the conduit includes a first conduit extending from the opening on the lower surface to the first opening, and the second opening from the opening on the upper surface. And a second conduit extending to the opening. In this case, it is possible to connect the two lightning conductors that are pulled out from the side surface through the lightning conductor from the bottom to the opening on the lower surface and pulled out from the side surface through another lightning conductor from the top to the opening on the upper surface. Therefore, the lightning conductor that extends downward from the upper column and the lightning conductor that extends upward from the lower column can be connected at a position facing the side surface of the joint member.

  Further, slab concrete may be placed at a position facing the side surface, and the height positions of the first opening and the second opening may be a height position facing the slab concrete to be placed. In this case, since the 1st opening and 2nd opening which are located in the side surface of a joint member are the height positions which oppose slab concrete, the 1st opening and 2nd opening are made into slab concrete by placement of slab concrete. Can be embedded in. Therefore, the connection part of the lightning conductor drawn out from the first opening and the second opening can also be embedded in the slab concrete. Therefore, the connection portion of the lightning conductor can be reliably embedded by embedding the slab concrete, and the covering thickness of the connection portion can be sufficiently secured, so that the workability is improved and the possibility of explosion is further reduced. be able to.

  A lightning conductor connecting structure according to the present invention is a lightning conductor connecting structure including the above-described joint member and a lightning conductor, and the lightning conductor extends through the first opening through the first duct. A first lightning conductor and a second lightning conductor which is passed through the second pipe line and extends from the second opening, and the first lightning conductor and the second lightning conductor are opposed to the side surface. The connection part of the 1st lightning conductor and the 2nd lightning conductor is embedded in the slab concrete.

  In this lightning conductor connecting structure, the first lightning conductor is passed through the opening on the lower surface of the joint member from below, and the first lightning conductor protrudes from the first opening on the side surface. Further, the second lightning conductor is passed through the opening on the upper surface of the joint member from above, and the second lightning conductor protrudes from the second opening on the side surface. And the 1st lightning conductor and the 2nd lightning conductor which protrude in the side surface side of a joint member are connected, and this connection part is embedded in the slab concrete. As described above, since the connection portion of the lightning conductor is embedded by slab concrete placement, the above-described extra work such as repairing the plasterer is not necessary, and the covering thickness of the connection portion is sufficiently secured. be able to. Therefore, the workability can be improved and the concern about explosion can be solved.

  The lightning conductor connecting method according to the present invention is a method of connecting a lightning conductor in a joint member, wherein the first lightning conductor is inserted into the opening located on the lower surface of the joint member from below to prepare the first lightning conductor. A step of projecting from the first opening located on the side surface of the mouth member; a second lightning conductor is inserted from above into the opening located on the upper surface of the mouth member; and the second lightning conductor is located on the side surface of the mouth member. A step of projecting from the second opening, a step of connecting the first lightning conductor projecting from the first opening and the second lightning conductor conducting from the second opening at a position facing the side surface, the first lightning conductor and the second And a step of filling the connection portion with the lightning conductor with slab concrete.

  In this lightning conductor connection method, the first lightning conductor is inserted into the opening on the lower surface of the joint member from below, the first lightning conductor is protruded from the first opening on the side surface, and the first lightning conductor is projected into the opening on the upper surface of the joint member from above. 2 The lightning conductor is inserted, the second lightning conductor is protruded from the second opening on the side surface, and the protruded first lightning conductor and the second lightning conductor are connected. And this connection part is embedded with slab concrete. Therefore, like the above-described lightning conductor connecting structure, the connecting portion is embedded by placing slab concrete, so that the workability can be improved and the explosion can be eliminated.

  According to the present invention, workability can be improved, and explosion at the connection portion of the lightning conductor can be avoided.

It is a longitudinal cross-sectional view which shows the joint member which concerns on embodiment, and the connection structure of a lightning conductor. (A) is a cross-sectional view of the joint member of FIG. (B) is a cross-sectional view of a PC pillar. It is a longitudinal cross-sectional view which shows the connection method of the lightning conductor based on embodiment. It is a longitudinal cross-sectional view which shows the continuation of the connection method shown by FIG. It is a longitudinal cross-sectional view which shows the continuation of the connection method shown by FIG. It is a longitudinal cross-sectional view which shows the state which the connection of the lightning conductor lead was completed by the connection method shown by FIGS.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 1, a plurality of joint members 1 according to the present embodiment are provided in a building S, for example. The joint member 1 has a substantially rectangular parallelepiped shape, and is sandwiched between PC columns (precast concrete columns) 2 from above and below in the vertical direction. Specifically, the joint member 1 has an upper surface 1a, a lower surface 1e, and a side surface 1c adjacent to the upper surface 1a and the lower surface 1e. Further, the joint member 1 is connected to a PC beam (precast concrete beam) 3, and the PC beam 3 and the PC column 2 are joined. The plurality of joint members 1 are provided side by side, and each floor of the building S is constituted by PC beams 3 extending horizontally from the respective joint members 1.

  The building S includes a lightning conductor (also referred to as a demon strand) L, and a current from lightning flows through the lightning conductor L. For example, the upper end of the lightning conductor L is connected to a lightning rod located on the roof of the building S, and the lower end of the lightning conductor L is connected to a ground electrode located in the ground. One lightning conductor L is passed through one PC pillar 2. The lightning conductor L extends in the longitudinal direction (vertical direction) of the PC column 2 in a state of being embedded in the PC column 2 and protrudes from the end surface 2 a located at the upper end and the lower end of the PC column 2.

  The joint member 1 is, for example, precast concrete (precast member) manufactured in advance in a factory. The joint member 1 includes conduits 11 and 12 through which the lightning conductor L is passed. The pipelines 11 and 12 are, for example, sheath tubes embedded in the joint member 1 in advance at a factory or the like. The pipe line (second pipe line) 11 is curved from the opening 1b formed on the upper surface 1a in the vertical direction of the joint member 1 toward the opening (second opening) 1d formed on the side surface 1c of the joint member 1. The pipe line (first pipe line) 12 extends from the opening 1f formed in the lower surface 1e in the vertical direction of the joint member 1 toward the opening (first opening) 1g formed in the side surface 1c. Curved and stretched. The pipeline 11 and the pipeline 12 are arranged apart from each other so as not to overlap, and the opening 1d of the pipeline 11 and the opening 1g of the pipeline 12 are arranged side by side in the vertical direction.

  In the joint member 1, the lightning conductor L is passed through the pipelines 11 and 12, and the two lightning conductors L are connected at a position outside the side surface 1 c. Thus, in the connection structure of the lightning conductor L according to this embodiment, the two lightning conductors L are connected at a position facing the side surface 1c. The two lightning conductors L are connected by, for example, a cylindrical crimp terminal, but may be connected by means other than the crimp terminal.

  Further, the connection portion P of the two lightning conductors L is embedded in the slab concrete C. The slab concrete C is, for example, floor concrete placed on a PC floor board (precast concrete floor board) Y, and constitutes a floor slab of each floor of the building S. In the side surface 1c of the joint member 1, the heights of the openings 1d and 1g are at a height position facing the slab concrete C placed. That is, the openings 1d and 1g on the side surface 1c of the joint member 1 are formed at positions that fall within the slab concrete C placement range. Accordingly, the openings 1d and 1g are embedded in the slab concrete C that has been placed. In addition, although illustration is abbreviate | omitted, the inside of the pipe lines 11 and 12 is filled with grout.

  As shown in FIG. 2A, a plurality of reinforcing bars F are driven into the joint member 1 in a lattice shape, and the ducts 11 and 12 are arranged at positions where the reinforcing bars F are avoided. Further, as shown in FIG. 2 (b), the reinforcing bars F are also driven into the PC pillar 2 in a lattice shape, and the lightning conductor L is disposed at a position avoiding the reinforcing bars F. The positions of the pipelines 11 and 12 on the horizontal plane are located closer to the corners than the center of the joint member 1, thereby avoiding interference with injection holes such as grout located near the center.

  2 (a) and 2 (b) simplify the illustration of the reinforcing bars F. In fact, more reinforcing bars F are arranged vertically and horizontally in the joint member 1 and the PC pillar 2. FIG. In addition, a plurality of main bars and a plurality of stirrups are driven into the PC beam 3. For example, the connection portion P of the lightning conductor L is pushed between the main bar and the stirrups of the PC beam 3, and these main bars and ribs are inserted. It is fixed in a state where it enters between the muscles.

  Next, a method for connecting the lightning conductor L in the joint member 1 will be described with reference to FIGS. Hereinafter, the lightning conductor L that protrudes upward from the lower PC pillar 2 will be described as a first lightning conductor L1, and the lightning conductor L that protrudes downward from the upper PC pillar 2 will be described as a second lightning conductor L2. In this connection method, the end of the first lightning conductor L1 and the end of the second lightning conductor L2 are connected.

  First, as shown in FIG. 3, the PC pillar 2 is arranged immediately below the joint member 1, and the first lightning conductor L <b> 1 protruding above the PC pillar 2 is formed in the opening 1 f of the lower surface 1 e of the joint member 1. Insert from below. When the first lightning conductor L1 is inserted into the opening 1f from the bottom, the first lightning conductor L1 moves upward and toward the side surface 1c in the conduit 12, and then protrudes from the opening 1g on the side surface 1c. In this way, the first lightning conductor L1 protrudes from the opening 1g and the first lightning conductor L1 is pulled out from the opening 1g, and the PC pillar 2 is connected to the lower side of the joint member 1 (first lightning conductor L1). Projecting from the opening 1g located on the side surface 1c of the joint member 1).

  Next, as shown in FIG. 4, another PC pillar 2 is disposed immediately above the joint member 1, and the second lightning conductor L <b> 2 protruding below the PC pillar 2 is connected to the upper surface 1 a of the joint member 1. Is inserted from above into the opening 1b. When the second lightning conductor L2 is inserted into the opening 1b from above, the second lightning conductor L2 moves downward in the conduit 11 and toward the side surface 1c, and then protrudes from the opening 1d on the side surface 1c. In this way, with the second lightning conductor L2 protruding from the opening 1d and the second lightning conductor L2 pulled out of the opening 1d, the PC pillar 2 is connected to the upper side of the joint member 1 (the second lightning conductor L2 is connected). Projecting from the opening 1d located on the side surface 1c of the joint member 1).

  Subsequently, as shown in FIG. 5, the first lightning conductor L1 and the second lightning conductor L2 drawn to the outside of the side surface 1c are connected. Specifically, for example, after the first lightning conductor L1 and the second lightning conductor L2 are bound by a cylindrical crimp terminal, the first lightning conductor is cut by cutting an excessive tip portion extending from the bound part. L1 and the second lightning conductor L2 are connected.

  In this way, the first lightning conductor L1 and the second lightning conductor L2 are connected to form a connection portion P between the first lightning conductor L1 and the second lightning conductor L2 at a position facing the side surface 1c (first lightning conductor). A step of connecting L1 and the second lightning conductor L2 at a position facing the side surface 1c). Finally, as shown in FIG. 6, the connection of the two lightning conductors L1 and L2 is completed by placing slab concrete C on the PC floor board Y from above and embedding the connecting portion P in the slab concrete C ( Step of filling the connecting portion P with slab concrete C).

  Next, the effect in the connection member 1, the connection structure of the lightning conductor L1, L2, and the connection method of the lightning conductor L1, L2 according to the present embodiment will be described. In the connection member 1, the connection structure of the lightning conductors L1 and L2, and the connection method of the lightning conductors L1 and L2, the pipe line 12 through which the first lightning conductor L1 passes is located on the side surface 1c from the opening 1f located on the lower surface 1e. The pipe line 11 through which the second lightning conductor L2 is passed extends from the opening 1b located on the upper surface 1a to the opening 1d located on the side surface 1c. Therefore, the lightning conductors L1 and L2 embedded in each of the PC pillars 2 are passed from the opening 1f on the lower surface 1e to the opening 1g on the side surface 1c and from the opening 1b on the upper surface 1a to the opening 1d on the side surface 1c. The lightning conductors L1 and L2 can be projected from the openings 1d and 1g, and the lightning conductors L1 and L2 can be connected.

  Therefore, a structure such as a notch portion (for example, a notch portion formed at the lower end of the side surface of the column) that has been conventionally formed for connection of the lightning conductor is provided in either the joint member 1 or the PC column 2. Need not be provided. Therefore, since it is not necessary to repair plastering of the notched portion after the lightning conductors L1 and L2 are connected, workability can be improved. Further, since the lightning conductors L1 and L2 projected from the openings 1d and 1g on the side surface 1c are embedded with the slab concrete C after the connection, the covering thickness of the connection portion P of the lightning conductors L1 and L2 can be sufficiently secured. . Accordingly, it is possible to reliably avoid a situation in which explosion occurs at the connection portion P of the lightning conductors L1 and L2.

  The joint member 1 is a precast member in which the pipes 11 and 12 are embedded in advance. Therefore, at the site, the lightning conductors L1 and L2 are connected to the pipelines 11 and 12 through the lightning conductors L1 and L2, and the construction can be completed only by embedding the connection portion P of the lightning conductors L1 and L2. Therefore, workability is further improved.

  Further, in the joint member 1, the opening 1f of the lower surface 1e is projected from the side surface 1c through the lightning conductor L1 from below, and is projected from the side surface 1c through the other lightning conductor L2 from the opening 1b of the upper surface 1a, and is projected from the side surface 1c. Two lightning conductors L1 and L2 are connected. Therefore, the lightning conductor L2 extending downward from the upper PC pillar 2 and the lightning conductor L1 extending upward from the lower PC pillar 2 can be connected in the vicinity of the side surface 1c of the joint member 1.

  Moreover, the slab concrete C is cast in the position facing the side surface 1c, and the height positions of the openings 1d and 1g are the height positions facing the slab concrete C to be cast. Therefore, by placing the slab concrete C, the openings 1d and 1g are embedded in the slab concrete C, and the connection portions P of the lightning conductors L1 and L2 protruding from the openings 1d and 1g are also embedded in the slab concrete C. Therefore, since the connection portion P of the lightning conductors L1 and L2 can be reliably embedded by embedding the slab concrete C, and the covering thickness of the connection portion P can be sufficiently secured, the workability is improved and the connection portion P is improved. It is possible to further reduce the possibility of explosion caused by the above.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment, It deform | transformed in the range which does not change the summary described in each claim, or applied to others It may be a thing. That is, the present invention can be variously modified without changing the gist of each claim.

  For example, in the above-described embodiment, the joint member 1 includes the two pipelines 11 and 12, and the pipeline 11 extends in a curved manner from the opening 1b on the upper surface 1a toward the opening 1d on the side surface 1c. The example in which the pipe 12 is curved and extended from the opening 1f of the lower surface 1e toward the opening 1g of the side face 1c has been described, but the shapes of the pipes 11 and 12 are not limited to this example and can be changed as appropriate. is there. However, when the ducts 11 and 12 are curved in the direction toward the side surface 1c, there is an advantage that the lightning conductors L1 and L2 can be smoothly inserted into the ducts 11 and 12.

  Moreover, although the above-mentioned embodiment demonstrated the example in which the opening 1d arrange | positioned at the side surface 1c of the joint member 1 and the opening 1g are arrange | positioned up and down, it is not limited to this example. That is, the position of the opening arranged on the side surface of the joint member can be changed as appropriate.

  Further, the joint member 1 may not include the two pipelines 11 and 12, and may include only one of the pipelines 11 and 12. That is, only one of the conduit 11 extending from the opening 1b on the upper surface 1a to the opening 1d located on the side surface 1c and the conduit 12 extending from the opening 1f on the lower surface 1e to the opening 1g located on the side surface 1c is provided. It may be.

  It is also possible to change the configuration of the PC pillar 2 and the PC beam 3 as appropriate. The members connected to the joint member 1 may not be the PC pillar 2 and the PC beam 3, and members other than the PC pillar 2 and the PC beam 3 may be connected to the joint member 1. Furthermore, in the above-described embodiment, the slab concrete C is placed on the PC floor board Y from above, but the slab concrete C may be placed on a member other than the PC floor board Y (for example, a formwork or a deck slab).

DESCRIPTION OF SYMBOLS 1 ... Joint member, 1a ... Upper surface, 1b ... Opening, 1c ... Side surface, 1d ... Opening (2nd opening), 1e ... Lower surface, 1f ... Opening, 1g ... Opening (1st opening), 2 ... PC pillar (column 3) PC beam, 11 ... Pipe line (second pipe line), 12 ... Pipe line (first pipe line), C ... Slab concrete, F ... Rebar, L ... Lightning conductor, L1 ... First lightning conductor, L2 ... second lightning conductor, P ... connection part, S ... building.

Claims (6)

A joint member connected to a pillar through which a lightning conductor conducting current from lightning passes,
A conduit through which the lightning conductor is passed,
The pipe line extends from an opening located on either the upper surface or the lower surface of the joint member to an opening located on a side surface adjacent to the upper surface or the lower surface.
Joint member. The pipe is a precast member embedded in advance,
The joint member according to claim 1. The opening located on the side surface includes a first opening and a second opening,
The conduit includes a first conduit extending from the opening on the lower surface to the first opening, and a second conduit extending from the opening on the upper surface to the second opening,
The joint member according to claim 1 or 2. Slab concrete is cast at a position facing the side surface,
The height position of the first opening and the second opening is a height position facing the slab concrete to be placed,
The joint member according to claim 3. A lightning conductor connecting structure comprising the joint member according to claim 4 and the lightning conductor,
The lightning conductor is passed through the first conduit and extends from the first opening, and the second lightning conductor is passed through the second conduit and extends from the second opening. A lead wire, and
The first lightning conductor and the second lightning conductor are connected at a position facing the side surface,
The connection portion between the first lightning conductor and the second lightning conductor is embedded in the slab concrete.
Lightning conductor connection structure. A method of connecting a lightning conductor in a joint member,
Inserting a first lightning conductor from below into an opening located on the lower surface of the joint member, and projecting the first lightning conductor from a first opening located on a side surface of the joint member;
Inserting a second lightning conductor from above into an opening located on the upper surface of the joint member, and projecting the second lightning conductor from a second opening located on the side of the joint member;
Connecting the first lightning conductor protruding from the first opening and the second lightning conductor protruding from the second opening at a position facing the side surface;
Filling a connecting portion between the first lightning conductor and the second lightning conductor with slab concrete;
A lightning conductor connecting method comprising:

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