Lightning protection connector and lightning protection connection body

Abstract

To provide a lightning protection connector capable of surely conducting a bar steel and a bypass conduction part while simplifying a construction, and provide a lightning protection connection body having the lightning protection connector.SOLUTION: The present invention provides a lightning protection connector that conducts a bypass conduction part and a bar steel, comprising: a base part having a penetration hole into which the bar steel is inserted; a first conductive piece that is extended from a penetration hole peripheral edge part of the base part; and a second conduction piece that is extended from the penetration hole peripheral edge part of the base part or a portion on an outer peripheral side from the base part. The first conductive piece is depressed to the bar steel by an elastic force generated by elastic deformation when the bar steel is inserted into the bypass conduction part via the penetration hole. The second conductive piece is engaged with the bypass conduction part by an elastic force generated by the elastic deformation when the base part is overlapped with an open peripheral edge part of the bypass conduction part, and the base part, the first conductive piece, and the second conductive piece are integrated.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lightning connector that provides electrical continuity between a steel bar and a cylindrical bypass conductive part for lightning protection, and to a lightning connection body that includes the lightning connector. [Background technology]

[0002] Conventionally, a lightning connector has been known, for example, as described in Patent Document 1. This lightning connector is used between multiple precast concrete blocks stacked one above the other to conduct (i.e., electrically connect) reinforcing bars (steel bars) embedded in the precast concrete blocks, allowing the current caused by a lightning strike on a structure to flow to the ground on which the structure is located.

[0003] Specifically, the lightning connection body comprises a joint (bypass conductive portion) formed in a cylindrical shape from a conductive metal and into which a steel bar is inserted through openings at both ends, and a lightning connector that provides electrical conductivity between the steel bar and the joint at the end of the joint.

[0004] The lightning connector includes a base attached to the joint, a support member fixed to the base, and a contact member fixed to the support member. The contact member includes a pair of clamping parts facing each other, and a tension member is connected to the clamping parts. The support member is configured to be plastically deformed by pulling the tension member, so that the clamping parts come into conductive contact with the reinforcing bar.

[0005] However, the structure of the lightning connector is complex, combining a base, support member, contact member, tension member, etc., in order to ensure electrical continuity between the reinforcing bar and the joint, and so there was room for improvement in terms of manufacturing costs. However, if the structure of the lightning connector is simplified, there are cases in which the electrical continuity between the steel bar and the joint is insufficient. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5438562 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, an object of the present invention is to provide a lightning connector that can reliably establish electrical continuity between a steel bar and a bypass conductive portion while simplifying the configuration, and a lightning connection body that includes the lightning connector. [Means for solving the problem]

[0008] The lightning protection connector of the present invention comprises: A lightning connector for electrically connecting a cylindrical bypass conductive part having electrical conductivity and open ends to a steel bar having an end inserted into the bypass conductive part, a plate-shaped base having a through hole in a central portion and extending in a plane direction perpendicular to a penetration direction of the through hole, the base being overlapped with an opening peripheral portion of the bypass conductive portion and into which the steel bar is inserted; A first conductive piece extending from a peripheral portion of the through hole of the base to one surface side or the other surface side of the base; a second conductive piece extending from the through hole peripheral portion or a portion of the base portion that is outer circumferentially away from the through hole peripheral portion toward one surface of the base portion, When the steel bar is inserted into the bypass conductive portion through the through hole, the first conductive piece is pressed against the steel bar by an elastic force generated by the steel bar being pushed by the steel bar toward the outside of the through hole as viewed from the penetration direction, and elastic deformation is generated. when the base is placed on the opening peripheral portion so that the one surface faces the opening peripheral portion, the second conductive piece engages with the bypass conductive portion by an elastic force generated by the second conductive piece being pressed by the opening peripheral portion so as to be elastically deformed toward the inside of the through hole as viewed from the penetration direction, or by an elastic force generated by the second conductive piece being pressed by an end of the bypass conductive portion so as to be elastically deformed toward the outside of the base as viewed from the penetration direction, The base, the first conductive piece, and the second conductive piece are integral with each other.

[0009] In this way, the base, the first conductive piece, and the second conductive piece are integrated to simplify the configuration, and when the lightning connector is placed in the bypass conductive portion, the elastic force generated in the first and second conductive pieces presses the first conductive piece against the steel bar and the second conductive piece engages with the bypass conductive portion, ensuring electrical conductivity between the steel bar and the bypass conductive portion.

[0010] In the lightning protection connector, The first conductive piece may extend from a peripheral edge of the through hole toward one surface of the base.

[0011] According to this configuration, when the steel bar attempts to move in a direction to come out of the bypass conductive section, the first conductive piece attempts to move in a direction to be pressed against the steel bar (see the dotted line in Figure 16(b) and arrows D1 in Figures 16(a) and 16(b)), so that the steel bar inserted into the bypass conductive section through the through hole of the lightning connector is less likely to come out.

[0012] In addition, in the lightning protection connector, The second conductive pieces are arranged at intervals in the circumferential direction in the outer circumferential portion, These multiple second conductive pieces may each extend toward one side of the base, and when the base is placed over the opening peripheral portion so that the one side faces the opening peripheral portion, the elastic force clamps the end of the bypass conductive portion from the outer periphery.

[0013] In this way, by sandwiching the end of the bypass conductive portion from the outer periphery with the multiple second conductive pieces, electrical continuity between the second conductive pieces and the bypass conductive portion is more reliably achieved. Moreover, since the lightning connector can be attached (fixed) to the bypass conductive portion without using fastening members such as screws, the work of attaching the lightning connector to the bypass conductive portion becomes easier.

[0014] In addition, in the lightning protection connector, The steel bar has a surface extending in an extension direction of the steel bar at at least one portion in a circumferential direction, The first conductive piece may be arranged at a position corresponding to a surface of the steel bar in the circumferential direction of the peripheral portion of the through hole.

[0015] With this configuration, the first conductive piece is pressed against the surface of the steel bar when the steel bar is inserted into the bypass conductive section through the through hole of the lightning connector, making it easier to ensure the contact area between the first conductive piece and the steel bar, thereby ensuring more reliable conductivity between the first conductive piece and the steel bar.

[0016] In addition, in the lightning protection connector, The steel bar has the surface at each of a plurality of positions in the circumferential direction, The first conductive piece and the second conductive piece are each arranged in a plurality of pieces, The number of the second conductive pieces may be greater than the number of the first conductive pieces.

[0017] Because the first conductive piece contacts the surface of the steel bar, while the second conductive piece contacts the peripheral surface of the detour conductive portion, the contact area between one second conductive piece and the detour conductive portion (peripheral surface) is likely to be smaller than the contact area between one first conductive piece and the steel bar (surface). However, by making the number of second conductive pieces greater than the number of first conductive pieces as in the above configuration, the total contact area between the second conductive pieces and the detour conductive portion increases, and this makes it possible to ensure a contact area between the lightning connector and the detour conductive portion that is approximately the same as the contact area between the lightning connector and the steel bar.

[0018] In addition, in the lightning protection connector, The first conductive pieces extend from opposite positions on the periphery of the through hole, The dimension along the first conductive piece from the base end to the tip end of the first conductive piece may be smaller than half the distance between the base ends of the first conductive pieces at the opposing positions.

[0019] By setting the length of the first conductive piece as described above, it becomes possible to form the lightning connector from a single plate-like member (see, for example, Figures 2, 3, and 5), further simplifying the configuration.

[0020] In addition, in the lightning protection connector, the second conductive piece has a protrusion extending from a peripheral portion of the through hole and protruding outward from the through hole as viewed in the penetration direction, The convex portion may engage with the opening peripheral portion by causing the second conductive piece to return or attempt to return to its shape before elastic deformation due to the elastic force when the base is placed over the opening peripheral portion so that the one surface faces the opening peripheral portion.

[0021] According to this configuration, by overlapping the base of the lightning connector with the peripheral opening portion of the bypass conductive portion, the second conductive piece can be engaged with the peripheral opening portion of the bypass conductive portion, which makes it easier to attach the lightning connector to the bypass conductive portion.

[0022] In addition, the lightning connector according to the present invention comprises: A lightning connector that is embedded in a precast concrete block with embedded steel bars and that conducts electricity between the steel bars of adjacent precast concrete blocks in the extension direction of the steel bars, At least the portion that performs the conduction is conductive, the bypass conduction portion is tubular with both ends open, and the steel bar is inserted through the openings; a lightning connector at an end of the bypass conductive portion for electrically connecting the end and the steel bar; The lightning connector comprises: a plate-shaped base having a through hole in a central portion and extending in a plane direction perpendicular to a penetration direction of the through hole, the base being overlapped with an opening peripheral portion of the bypass conductive portion and into which the steel bar is inserted; A first conductive piece extending from a peripheral portion of the through hole of the base to one surface side or the other surface side of the base; a second conductive piece extending from the through hole peripheral portion or a portion of the base portion that is on the outer circumferential side of the through hole peripheral portion toward one surface of the base portion, When the steel bar is inserted into the bypass conductive portion through the through hole, the first conductive piece is pressed against the steel bar by an elastic force generated by the steel bar being pushed by the steel bar toward the outside of the through hole as viewed from the penetration direction, and elastic deformation is generated. when the base is placed on the opening peripheral portion so that the one surface faces the opening peripheral portion, the second conductive piece engages with the bypass conductive portion by an elastic force generated by the second conductive piece being pressed by the opening peripheral portion so as to be elastically deformed toward the inside of the through hole as viewed from the penetration direction, or by an elastic force generated by the second conductive piece being pressed by an end of the bypass conductive portion so as to be elastically deformed toward the outside of the base as viewed from the penetration direction, The base, the first conductive piece, and the second conductive piece are integral with each other.

[0023] In this way, by integrating the base, the first conductive piece, and the second conductive piece, it is possible to simplify the configuration of the lightning connection body (more specifically, the lightning connector). Moreover, when the lightning connector is placed in the bypass conductive part, the first conductive piece is pressed against the steel bar by elastic forces generated in the first and second conductive pieces, and the second conductive piece engages with the bypass conductive part, thereby ensuring electrical continuity between the steel bar and the bypass conductive part. Therefore, by placing the lightning connectors on both ends of the bypass conductive part, it is possible to ensure electrical continuity between the steel bars inserted into both ends (respective openings) of the bypass conductive part.

[0024] In the lightning connector, The first conductive piece extends from a peripheral portion of the through hole to one surface side of the base, The second conductive piece may extend from the outer circumferential portion toward one surface of the base portion.

[0025] According to this configuration, when the steel bar attempts to move in a direction to come out of the bypass conductive portion, the first conductive piece attempts to move in a direction to be pressed against the steel bar (see the dotted line in Figure 16(b) and arrows D1 in Figures 16(a) and 16(b)), and the multiple second conductive pieces attempt to more firmly clamp the end of the bypass conductive portion (see arrows D2 in Figures 16(a) and 16(b)). As a result, it becomes difficult for the steel bar to come out of the lightning connector and the lightning connector becomes difficult to come out of (disconnect) from the bypass conductive portion.

[0026] In addition, in the lightning connector, The steel bar has a surface extending in an extension direction of the steel bar at at least one portion in a circumferential direction, The opening of the bypass conductive portion is a circle having a diameter corresponding to a diameter of the steel bar in the absence of the surface, The first conductive piece may be positioned at a position corresponding to the circumferential surface of the steel bar at the peripheral portion of the through hole, and may extend between the surface of the steel bar and the opening peripheral portion to the inside of the bypass conductive portion.

[0027] In this way, the first conductive piece is inserted by utilizing the gap (between the surface and the peripheral edge of the opening of the bypass conductive part) that is generated when a steel bar having the surface is inserted into the circular opening of the bypass conductive part. Even if the first conductive piece of the lightning connector extends from the peripheral edge of the through hole to one side of the base, it is not necessary to form a separate hole or gap for inserting the first conductive piece at the boundary between the steel bar and the peripheral edge of the opening of the bypass conductive part.

[0028] In addition, in the lightning connector, The opening peripheral portion has a step surface extending in an inner circumferential direction and facing inward in the opening direction, the second conductive piece has a protrusion extending from a peripheral portion of the through hole and protruding outward from the through hole as viewed in the penetration direction, The convex portion may engage with the step surface by causing the second conductive piece to return or attempt to return to its shape before elastic deformation due to the elastic force when the base is placed over the opening peripheral portion so that one of the surfaces faces the opening peripheral portion.

[0029] According to this configuration, by overlapping the base of the lightning connector with the peripheral opening portion of the bypass conductive portion, the second conductive piece can be engaged with the peripheral opening portion of the bypass conductive portion, which makes it easier to attach the lightning connector to the bypass conductive portion. Effect of the Invention

[0030] As described above, according to the present invention, it is possible to provide a lightning connector that can reliably establish electrical continuity between a steel bar and a bypass conductive portion while simplifying the configuration, and a lightning connection body that includes the lightning connector. [Brief description of the drawings]

[0031] [Figure 1] FIG. 1 is a vertical cross-sectional view showing the structure of a lightning connection body according to this embodiment. [Diagram 2] FIG. 2 is a view of a first lightning connector provided in the lightning connecting body as viewed from the penetration direction of a through hole. [Diagram 3] 3 is a cross-sectional view of the first lightning connector taken along line III-III in FIG. 2. FIG. [Figure 4] FIG. 4 is a cross-sectional view of the first lightning connector taken along line IV-IV in FIG. [Diagram 5] FIG. 5 is a view of the flat first lightning connector before each portion is bent, as viewed from the penetration direction. [Figure 6] FIG. 6 is a vertical cross-sectional view of one end of the lightning connection body at a position passing through a first conductive piece. [Figure 7] FIG. 7 is a cross-sectional view of the lightning connector taken along line VII-VII in FIG. [Figure 8] FIG. 8 is a vertical cross-sectional view of one end of the lightning connection body at a position passing through a second conductive piece. [Figure 9] FIG. 9 is a view of the second lightning connector provided in the lightning connecting body as viewed from the penetration direction. [Figure 10] FIG. 10 is a cross-sectional view of the second lightning connector taken along line XX in FIG. [Figure 11] FIG. 11 is a cross-sectional view of the second lightning connector taken along line XI-XI in FIG. [Figure 12] FIG. 12 is a view of the flat second lightning connector before each portion is bent, as viewed from the penetration direction. [Figure 13] FIG. 13 is a vertical cross-sectional view of the other end of the lightning connection body at a position passing through a second conductive piece. [Figure 14] FIG. 14 is a vertical cross-sectional view of one end of the lightning connection body at a position passing through a first conductive piece. [Figure 15] Figure 15 is a diagram showing the movement of each part of the first lightning connector, in which the first conductive piece extends to the side opposite the opposing surface of the base, when the steel bar tries to move in the direction of removal. [Figure 16] Figure 16 is a diagram showing the movement of each part of the first lightning connector, in which the first conductive piece extends toward the opposing surface of the base, when the steel bar tries to move in the direction of removal. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] Hereinafter, one embodiment of the present invention will be described with reference to FIGS.

[0033] The lightning connection body 1 of this embodiment is embedded together with a plurality (several tens) of steel bars R in a precast concrete block (hereinafter simply referred to as a "block") B in which the steel bars R are embedded (see FIG. 1).

[0034] The block B has, for example, a rectangular parallelepiped shape, and a plurality of blocks B are stacked vertically to form a structure such as a building. In the example of block B shown in Fig. 1, a plurality of steel bars R protrude from the upper end face B1 of each block B. Although the specific dimensions are not particularly limited, the steel bars R protrude from the upper end face B1 by, for example, about 300 mm. Furthermore, the lower end of a lightning connector 1, which will be described later, is exposed at the lower end face B2 of each block B.

[0035] The steel bars R embedded in adjacent blocks B are arranged vertically. Each steel bar R is conductive, and some of the steel bars R (as shown in the figure) embedded in each of the blocks B stacked vertically form part of the electrical conduction path from the lightning rod installed in the structure to the ground, and allow the current generated by a lightning strike to escape to the ground. Each steel bar R, including the steel bars R that do not form a lightning conduction path, is used solely to ensure the tensile strength of the block B.

[0036] The steel bar R used in this lightning conduction path is a type of steel bar generally called a "deformed steel bar," and has a spiral projection R1 on its outer periphery. This steel bar R also has a surface R2 in at least one circumferential portion that extends in the extension direction of the steel bar R (the up-down direction in the example shown in FIG. 1). The steel bar R in this embodiment has two (a pair of) surfaces R2 at positions that face each other in the radial direction, and each surface R2 is flat. As a result, the cross-sectional shape of the steel bar R is a racetrack shape (see FIG. 7).

[0037] In the example shown in Fig. 1, the lightning connector 1 is embedded in the lower part of the block B, and electrically connects the steel bars R that form part of the conductive path in vertically adjacent blocks B. When the steel bars R are electrically connected to each other, mortar or the like is filled inside the lightning connector 1 (see the area indicated by dots in Fig. 1). This lightning connector 1 is embedded in the block B together with the steel bars R during the manufacturing process of the block B.

[0038] Specifically, the lightning connection body 1 includes a cylindrical bypass conductive part 2 that is conductive and has both ends open, and a lightning connector 3 that electrically connects the ends 2a, 2b of the bypass conductive part 2 to the steel bar R. The lightning connector 3 of this embodiment includes a first lightning connector 3A that electrically connects one end 2a of the bypass conductive part 2 to the steel bar R, and a second lightning connector 3B that electrically connects the other end 2b of the bypass conductive part 2 to the steel bar R. This lightning connection body 1 electrically connects two steel bars R together by the first lightning connector 3A connecting one steel bar R to the bypass conductive part 2 and the second lightning connector 3B connecting the other steel bar R to the bypass conductive part 2.

[0039] The bypass conductive part 2 is a cylindrical member having electrical conductivity at least in a portion that performs electrical conduction, and a steel bar R is inserted from openings 21a, 21b at both ends (upper and lower ends in the example shown in FIG. 1). This bypass conductive part 2 is also called a "mechanical joint" or a "mortar filling joint", and an end of a steel bar R embedded in the same block B as the bypass conductive part 2 (upper block B in the example shown in FIG. 1) is inserted from one opening 21a, and an end of a steel bar R embedded in a block B adjacent to the block B in which the bypass conductive part 2 is embedded (lower block B in the example shown in FIG. 1) is inserted from the other opening 21b. This bypass conductive part 2 may be a general-purpose joint.

[0040] Specifically, the bypass conductive part 2 has a cylindrical conductive part body 22 and a packing 23 arranged at one end (upper in FIG. 1 ) of the conductive part body 22. The bypass conductive part 2 of this embodiment also has an internal protrusion (not shown) for positioning the steel bar R in the insertion direction relative to the bypass conductive part 2 by an end of the steel bar R coming into contact with the protrusion (not shown).

[0041] The conductive part body 22 is a cylindrical member entirely made of metal, specifically, iron such as conductive cast iron. As shown in Fig. 13 and Fig. 14, the opening periphery 221b of the other end 22b of the conductive part body 22 is a portion that defines the other opening 21b of the detour conductive part 2 (i.e., a portion that surrounds the other opening 21b). The other opening 21b defined by the opening periphery 221b is circular, and the inner diameter α2 is smaller than the outer diameter α5 of the conductive part body 22 (detour conductive part 2) and is larger than the diameter γ of the steel bar R when the surface R2 is not provided.

[0042] The opening peripheral portion 221b has, on one side in the opening direction (the up-down direction in the example shown in FIG. 1), a step surface 221D that extends in the circumferential direction (inner circumferential direction) of the conductive portion main body 22 and faces one side (inside) in the opening direction. The opening peripheral portion 221b has, on the other side in the opening direction, an end face that extends in the circumferential direction of the conductive portion main body 22 and faces the other side (outside) in the opening direction. This end face constitutes the other end face of the detour conductive portion 2.

[0043] As shown in Figs. 1 and 6 to 8, the packing 23 is disposed at one end 22a of the conductive part body 22 and is a portion that defines one opening 21a in the bypass conductive part 2 (i.e., a portion that surrounds one opening 21a). That is, the packing 23 constitutes one opening peripheral portion 221a of the bypass conductive part 2. This packing 23 is made of resin such as rubber. The packing 23 of this embodiment is a so-called slag stopper, and prevents concrete from entering between the conductive part body 22 and the steel bar R during the manufacture of the block B. The one opening 21a of the bypass conductive part 2 defined by the packing 23 of this embodiment is circular, and the inner diameter α1 is smaller than the outer diameter α5 of the conductive part body 22 and corresponds to (is approximately the same as) the diameter γ of the steel bar R when the surface R2 is not present. The surface of the packing 23 facing one side in the opening direction (the upper side in FIG. 1) and one end face of the conductive part main body 22 constitute one end face of the detour conductive part 2.

[0044] As shown in Figs. 1 to 4 and 9 to 11, the lightning connector 3 includes a base 30 having a through hole 301 in the center, a first conductive piece 31 extending from a through hole peripheral portion 302 of the base 30 to a surface (one surface) 30a of the base 30 facing the bypass conductive portion 2, and a second conductive piece 32 extending from the through hole peripheral portion 302 or a portion (outer peripheral portion) 303 of the base 30 on the outer periphery side of the through hole peripheral portion 302 to the facing surface 30a of the base 30. The lightning connector 3 of this embodiment includes a plurality of first conductive pieces 31 and a plurality of second conductive pieces 32. The base 30, the first conductive piece 31, and the second conductive piece 32 are integral with each other, and the lightning connector 3 of this embodiment is formed by bending a predetermined portion of a plate-like member having a predetermined shape (see Figs. 5 and 12 in this embodiment) having electrical conductivity.

[0045] The base 30 is plate-shaped and extends in a planar direction perpendicular to the penetration direction of the through hole 301 (the vertical direction in Figure 1), and a steel bar R is inserted into the through hole 301 with the base 30 overlapping the opening peripheral portions 221a, 221b of the bypass conductive portion 2.

[0046] When the steel bar R is inserted into the bypass conductive portion 2 through the through hole 301, the first conductive piece 31 is pressed against the steel bar R by the elastic force generated when the steel bar R is pushed toward the outside of the through hole 301 when viewed from the penetration direction and elastically deforms the steel bar R.

[0047] When the base 30 is placed on the opening peripheral portions 221a, 221b so that the opposing surface 30a faces the opening peripheral portions 221a, 221b, the second conductive piece 32 engages with the bypass conductive portion 2 by an elastic force generated when the second conductive piece 32 is pushed by the opening peripheral portion 221b and elastically deformed toward the inside of the through hole 301 when viewed from the penetration direction, or by an elastic force generated when the second conductive piece 32 is pushed by the end portion 2a of the bypass conductive portion 2 and elastically deformed toward the outside of the base 30 when viewed from the penetration direction.

[0048] As described above, the lightning connector 3 configured as above includes the first lightning connector 3A and the second lightning connector 3B. The first lightning connector 3A is a lightning connector arranged at one end 2a of the detour conductive section 2, and the second lightning connector 3B is a lightning connector arranged at the other end 2b of the detour conductive section 2. The first lightning connector 3A and the second lightning connector 3B will be specifically described below.

[0049] 1 to 8, the first lightning connector 3A includes a plate-shaped base 30A (30) having a through hole 301A (301), a first conductive piece 31A (31) extending from a through hole peripheral portion 302A (302) of the base 30A, and a second conductive piece 32A (32) extending from an outer peripheral portion 303A (303) of the base 30A. The first lightning connector 3A of this embodiment includes a plurality of first conductive pieces 31A (two in the example shown in FIG. 2) and a plurality of second conductive pieces 32A (three in the example shown in FIG. 2).

[0050] The base 30A is a disk-shaped portion having an outer diameter β1 larger than the outer diameter α5 of the conductive portion main body 22, and has a substantially circular through-hole 301A penetrating through the thickness direction in the center. The inner diameter β2 of this through-hole 301A (more specifically, the inner diameter at a position other than the arrangement position of the first conductive piece 31A) corresponds to (is substantially the same as) the diameter γ of the steel bar R. The base 30A of this embodiment has a notch 300A on the outer periphery. This notch 300A is used for circumferential alignment when attaching the first lightning connector 3A to one end 2a of the bypass conductive portion 2.

[0051] The multiple first conductive pieces 31A are arranged at intervals in the circumferential direction on the through hole peripheral portion 302A of the base 30A. In this embodiment, the multiple first conductive pieces 31A are respectively arranged at positions corresponding to each surface R2 of the steel bar R in the circumferential direction of the through hole peripheral portion 302A. That is, two first conductive pieces 31A extend from opposite positions on the through hole peripheral portion 302A across the through hole 301A.

[0052] Each of the first conductive pieces 31A has a straight strip shape with an arc-shaped tip. The two first conductive pieces 31A are arranged substantially parallel to each other, and more specifically, when the steel bar R is not inserted through the through hole 301A, the first conductive pieces 31A extend in a direction slightly inclined with respect to the direction of penetration of the through hole 301A so that the distance between them becomes smaller toward the tips.

[0053] The distance between the tips of the two first conductive pieces 31A is smaller than the distance between the two surfaces R2 of the steel bar R. As a result, when the steel bar R is inserted into the through hole 301A, the first conductive pieces 31A are pushed apart (elastically deformed) by the surfaces R2 of the steel bar R in a direction that widens the distance between the tips, and the two first conductive pieces 31A sandwich the steel bar R by the elastic force generated by the pushing apart. In other words, the first conductive pieces 31A are pressed against the surfaces R2 of the steel bar R, respectively.

[0054] Each of these two first conductive pieces 31A extends between the surface R2 of the steel bar R and the opening peripheral portion 221a to the inside of the bypass conductive portion 2 when the base 30A is positioned at one end 2a of the bypass conductive portion 2 so that the opposing surface 30Aa (30a) abuts against one end 22a of the conductive portion main body 22 with the opposing surface 30Aa (30a) facing the opening peripheral portion 221a of the bypass conductive portion 2 (see Figures 6 and 7).

[0055] The dimension (length dimension) L1 along the first conductive piece 31A from the base end to the tip of the first conductive piece 31A is smaller than half the distance β3 between the base ends of the first conductive pieces 31A facing each other across the through hole 301A (see Figure 5).

[0056] The second conductive pieces 32A are arranged at intervals in the circumferential direction on the outer periphery of the base 30A. The number of the second conductive pieces 32A is greater than the number of the first conductive pieces 31A. In this embodiment, the second conductive pieces 32A are arranged at equal intervals in the circumferential direction on the outer periphery of the base 30A, and the circumferential positions of the second conductive pieces 32A are different from the circumferential positions of the first conductive pieces 31A on the through-hole peripheral portion 302A. Note that the circumferential position of at least one second conductive piece 32A may be the same as the circumferential position of the first conductive piece 31A on the through-hole peripheral portion 302A.

[0057] Each second conductive piece 32A has a plate shape with a middle portion in the length direction wider than the other portions (see FIG. 5), and is bent at a midpoint in the length direction. Specifically, the second conductive piece 32A has a base end portion 321A extending from the base 30A at an incline toward the center of the through hole 301A with respect to the through-hole 301A penetration direction, and a tip end portion 322A extending from the tip of the base end portion 321A at an incline toward the outside of the base 30A (the side opposite the center of the through hole 301A) with respect to the through-hole penetration direction. The second conductive piece 32A is bent at the boundary between the base end portion 321A and the tip end portion 322A.

[0058] A diameter φ1 of an area Ar1 (see FIG. 2) surrounded by each bent portion of the second conductive pieces 32A is slightly smaller than an outer diameter α5 of the conductive portion main body 22. As a result, when the base 30A is disposed at one end 2a of the detour conductive portion 2 so that the opposing surface 30Aa of the base 30A faces the opening peripheral portion 221a and abuts against one end 22a of the conductive portion main body 22, the end 2a pushes (elastically deforms) each second conductive piece 32A (more specifically, the bent portion) outward from the base 30A (in the direction in which the area Ar1 expands), and the second conductive pieces 32A sandwich one end 2a of the detour conductive portion 2 from the outer periphery side due to an elastic force generated by the pushing and spreading.

[0059] In addition, the second conductive piece 32A has a bent portion, and when the base 30A is positioned at one end 2a of the bypass conductive section 2, the bent portion abuts against the outer peripheral surface of the one end 2a. In other words, the contact area of ​​the second conductive piece 32A with the outer peripheral surface is made smaller than in the case of surface contact. As a result, when the multiple second conductive pieces 32A clamp the one end 2a from the outer periphery by the elastic force, the pressure at the contact portion (the contact portion between the bent portion of the second conductive piece 32A and the outer peripheral surface of the one end 2a) becomes higher, and the one end 2a is firmly clamped.

[0060] Furthermore, when attaching the first lightning connector 3A to one end 2a of the detour conductive part 2, the one end 2a of the detour conductive part 2 is guided by the tip portion 322A of the second conductive piece 32A, making the attachment easier.

[0061] The first lightning protection connector 3A constructed as above is formed by bending predetermined portions 31A, 32A, etc. of a plate-like member having a predetermined shape as shown in FIG.

[0062] 1 and 9 to 14, the second lightning connector 3B includes a plate-shaped base 30B (30) having a through hole 301B (301), a first conductive piece 31B (31) extending from a through hole peripheral portion 302B (302) of the base 30B, and a second conductive piece 32B (32) extending from the through hole peripheral portion 302B of the base 30B. The second lightning connector 3B of this embodiment includes a plurality of first conductive pieces 31B (three in the example shown in FIG. 9) and a plurality of second conductive pieces 32B (three in the example shown in FIG. 9).

[0063] The base 30B is a disk-shaped portion having an outer diameter β5 larger than the outer diameter α5 of the conductive portion main body 22, and has a circular through hole 301B penetrating through the thickness direction in the center. The inner diameter β6 of this through hole 301B corresponds to (more specifically, is slightly smaller than) the inner diameter α2 of the opening 21b of the other end 2b of the detour conductive portion 2. The base 30B of this embodiment has a notch 300B on the outer periphery. This notch 300B is used for circumferential alignment when attaching the second lightning connector 3B to the other end 2b of the detour conductive portion 2.

[0064] The multiple first conductive pieces 31B are arranged at intervals in the circumferential direction on the through-hole peripheral portion 302B of the base 30B. In this embodiment, the multiple first conductive pieces 31B are arranged at positions corresponding to each surface R2 of the steel bar R in the circumferential direction of the through-hole peripheral portion 302B and at positions shifted by 90° from the corresponding positions in the circumferential direction of the through-hole peripheral portion 302B (see FIG. 9).

[0065] Each of the first conductive pieces 31B has a strip shape and both corners of the tip are arc-shaped (see FIGS. 11 and 12). Each of the three first conductive pieces 31B has an extension portion 311B extending from the through-hole peripheral portion 302B toward the center of the through-hole 301B, and an inclined portion 312B extending from the tip of the extension portion 311B so as to be inclined toward the center of the through-hole 301B with respect to the penetration direction of the through-hole 301B (see FIGS. 9 and 10).

[0066] The distance between the tips of the two first conductive pieces 31B corresponding to the surface R2 of the steel bar R is smaller than the distance between the two surfaces R2 of the steel bar R. As a result, when the steel bar R is inserted into the through hole 301B, the two first conductive pieces 31B are pushed apart (elastically deformed) in a direction in which the distance between the tips increases by each surface R2 of the steel bar R, and the two first conductive pieces 31B sandwich the steel bar R by the elastic force generated by the pushing apart. In other words, the two first conductive pieces 31B are each pressed against the surface R2 of the steel bar R.

[0067] In addition, when the steel bar R is inserted into the through hole 301B, the remaining first conductive piece 31B is pressed toward the outside of the base 30B by the peripheral surface of the steel bar R (the peripheral surface excluding surface R2), and is pressed against the peripheral surface of the steel bar R by the elastic force generated by this pressing.

[0068] The second conductive pieces 32B are arranged at intervals in the circumferential direction on the through-hole peripheral portion 302B of the base 30B. In this embodiment, the second conductive pieces 32B are arranged at equal intervals in the circumferential direction on the through-hole peripheral portion 302B of the base 30B, and the circumferential position of each second conductive piece 32B is different from the circumferential position of the first conductive piece 31B on the through-hole peripheral portion 302B.

[0069] Each second conductive piece 32B extends from the through-hole peripheral portion 302B and has a protrusion 320B that protrudes toward the outside of the through-hole 301B when viewed from the through-hole direction. Specifically, the second conductive piece 32B is a strip-shaped piece extending from the through-hole peripheral portion 302B along the through-hole direction, and has an arc-shaped tip. The second conductive piece 32B has the protrusion 320B at a position corresponding to the step surface 221D in the length direction. The second conductive piece 32B of this embodiment has the protrusion 320B at the center in the length direction and at the center in the width direction.

[0070] Each of the convex portions 320B of these three second conductive pieces 32B engages with the opening peripheral portion 221b (more specifically, the step surface 221D) when the base portion 30B is placed over the opening peripheral portion 221b (the other end portion 22b of the bypass conductive portion 2) so that the opposing surface 30Ba (30a) faces the opening peripheral portion 221b.

[0071] Specifically, the diameter φ2 of an imaginary circle C passing through the tip ends of the protruding portions 320B of the three second conductive pieces 32B in the protruding direction is slightly larger than the inner diameter α2 of the opening 21b (see FIG. 9). As a result, when the base portion 30B is disposed at the other end portion 2b of the bypass conductive portion 2 so that the facing surface 30Ba abuts against the opening peripheral portion 221b in a state where it faces the opening peripheral portion 221b, each second conductive piece 32B (more specifically, the protruding portion 320B) is pressed toward the center of the opening 21b by the opening peripheral portion 221b and elastically deformed, and the second conductive piece 32B returns or tries to return to its shape before the elastic deformation due to the elastic force generated by this pressing, so that the protruding portion 320B of each second conductive piece 32B engages with the step surface 221D.

[0072] The second lightning protection connector 3B constructed as above is formed by bending predetermined portions 31B, 32B, etc. of a plate-like member at predetermined diameters as shown in FIG.

[0073] The lightning connection body 1 of this embodiment is used by being embedded in the block B as described above. Specifically, a plurality of steel bars R and at least one detour conductive part 2 are arranged in a formwork for forming the block B. That is, one or a plurality of lightning connection bodies 1 are embedded in one block B. At this time, the end of the steel bar R embedded in the block B is inserted from the opening 21a of the detour conductive part 2 while being inserted through the through hole 301A of the first lightning connector 3A. Note that after the first lightning connector 3A is attached to one end 2a of the detour conductive part 2, the steel bar R may be inserted into the opening 21a of the detour conductive part 2 through the through hole 301A of the first lightning connector 3A.

[0074] In detail, the first lightning connector 3A is attached to the steel bar R by pushing the steel bar R into the through hole 301A of the first lightning connector 3A from the surface (the other surface) 30Ab opposite the opposing surface 30Aa to the opposing surface 30Aa side.

[0075] Next, the steel bar R to which the first lightning connector 3A is attached is inserted into the opening 21a of one end 2a of the detour conductive portion 2, and the first lightning connector 3A is pressed against one end 2a of the detour conductive portion 2 in the insertion direction of the steel bar R until the base 30A abuts against one end 22a of the conductive portion main body 22. At this time, the first conductive piece 31A of the first lightning connector 3A is in a state along the surface R2 of the steel bar R and does not interfere with one opening peripheral portion 221a (packing 23) of the detour conductive portion 2. In this way, the first lightning connector 3A is attached to one end 2a of the detour conductive portion 2.

[0076] Next, concrete is poured into the formwork, and after the concrete has hardened, the formwork is removed and Block B is completed.

[0077] When this block B is transported to a construction site and a plurality of blocks B are connected, a second lightning connector 3B is attached to the other end 2b of the detour conductive part 2 exposed from the lower end surface B2 of the block B. The second lightning connector 3B may be attached not at the construction site but at a factory where the block B is manufactured.

[0078] With the second lightning connector 3B attached in this manner, the block B in which the lightning connection body 1 is embedded is placed on top of another block B with a steel bar R protruding from its upper end B1. At this time, one of the steel bars R protruding from the other block B is inserted into the bypass conductive section 2 through the through hole 301B of the second lightning connector 3B. After the steel bar R is inserted from both ends of the lightning connection body 1 in this manner, mortar (cloud) is injected into the bypass conductive section 2, and the inside is filled with mortar M (see the area indicated by dots in FIG. 1).

[0079] The lightning connector 3 (first lightning connector 3A, second lightning connector 3B) of the above-mentioned lightning connection body 1 is a lightning connector 3 for providing electrical conductivity between a cylindrical bypass conductive portion 2 that is conductive and has open ends and a steel bar R whose end is inserted into the bypass conductive portion 2, and is equipped with a plate-shaped base 30 that has a through hole 301 in the center and extends in a planar direction perpendicular to the penetration direction of the through hole 301, the base 30 into which the steel bar R is inserted while being overlapped on the opening peripheral portions 221a, 221b of the bypass conductive portion 2, a first conductive piece 31 extending from the through hole peripheral portion 302 of the base 30 toward the opposing surface (one surface) 30a of the base 30, and a second conductive piece 32 extending from the through hole peripheral portion 302 or the outer periphery of the base 30 toward the opposing surface 30a of the base 30. When the steel bar R is inserted into the bypass conductive portion 2 through the through hole 301, the first conductive piece 31 is pressed against the steel bar R by an elastic force generated when the first conductive piece 31 is pushed by the steel bar R toward the outside of the through hole 301 as viewed from the penetration direction, and the second conductive piece 32 engages with the bypass conductive portion 2 by an elastic force generated when the first conductive piece 31 is pushed by the opening peripheral portion 221b toward the inside of the through hole 301 as viewed from the penetration direction, and elastic force generated when the second conductive piece 32 is pushed by one end portion 2a of the bypass conductive portion 2 toward the outside of the base 30 as viewed from the penetration direction, and the base 30, the first conductive piece 31 and the second conductive piece 32 are integral.

[0080] In this way, the base 30, the first conductive piece 31, and the second conductive piece 32 are integrated to simplify the configuration, and when the lightning connector 3 is placed in the bypass conductive section 2, the elastic force generated in the first and second conductive pieces 31, 32 presses the first conductive piece 31 against the steel bar R and engages the second conductive piece 32 with the bypass conductive section 2, thereby ensuring conductivity between the steel bar R and the bypass conductive section 2.

[0081] In the first lightning protection connector 3A of this embodiment, the first conductive piece 31A extends from the through-hole peripheral portion 302A to the opposing surface (one surface) 30Aa of the base portion 30A.

[0082] According to this configuration, when the steel bar R tries to move in a direction to come out of the bypass conductive portion 2, the first conductive piece 31A tries to move in a direction to be pressed against the steel bar R (see the two-dot chain line in FIG. 16(b) and the arrows D1 in FIG. 16(a) and FIG. 16(b)), so that the steel bar R inserted into the bypass conductive portion 2 through the through hole 301A of the first lightning connector 3A is less likely to come out. More details are as follows.

[0083] As shown in Figure 15(a), when the first conductive piece 31A of the first lightning connector 3A extends from the through hole peripheral portion 302A to the other surface 30Ab of the base 30A (the surface opposite the opposing surface 30Aa), when the steel bar R attempts to move in the direction of arrow A in Figure 15(b), the pair of first conductive pieces 31A clamp the steel bar R due to the elastic force generated when the steel bar R is inserted into the through hole 301A of the first lightning connector 3A, and therefore, due to friction between the surface R2 of the steel bar R and the first conductive pieces 31A, the base 30A and the first conductive pieces 31A attempt to move toward the position shown by the dotted line in Figure 15(b). As a result, the force D11 with which each first conductive piece 31A is pressed against the surface R2 of the steel bar R (i.e., the force with which the pair of first conductive pieces 31A clamp the steel bar) becomes smaller (see arrow D11 in Figure 15(a) and arrow D11 in Figure 15(b)), so that the movement of the steel bar R in the direction of arrow A cannot be sufficiently suppressed, and the steel bar R is likely to move in the direction of passing through the bypass conductive portion 2.

[0084] In addition, since the steel bar R has a flat surface R2, a gap is formed between the opening peripheral portion 221a of one opening 21a of the bypass conductive portion 2 and the flat surface R2 of the steel bar R. As a result, when the steel bar R and the lightning connector 1 are suspended so that the steel bar R is horizontal, the steel bar R is more likely to move in a tilted direction relative to the bypass conductive portion 2. As a result, the first lightning connector 3A tilts together with the steel bar R, that is, the first lightning connector 3A is more likely to come off (disconnect) from the bypass conductive portion 2 due to a shift caused by the tilt of the steel bar R.

[0085] In contrast, in the state shown in Fig. 16(a) (first lightning connector 3A of this embodiment), the pair of first conductive pieces 31A sandwich the steel bar R due to the elastic force generated by inserting the steel bar R into the through hole 301A of the first lightning connector 3A. In this state, when the steel bar R tries to move in the direction of arrow A in Fig. 16(b), the base 30A and the first conductive piece 31A try to move toward the position shown by the two-dot chain line in Fig. 16(b) due to friction between the surface R2 of the steel bar R and the first conductive piece 31A. As a result, the force D1 pressing each first conductive piece 31A against the surface R2 of the steel bar R (i.e., the force D1 with which the pair of first conductive pieces 31A sandwich the steel bar) increases, and the movement of the steel bar R in the direction of arrow A is suppressed.

[0086] In addition, when the steel bar R is inserted into the through hole 301A of the first lightning connector 3A and one of the openings 21a of the bypass conductive portion 2, the steel bar R and the lightning connector 1 are suspended so that the steel bar R is horizontal, and when the steel bar R tries to tilt relative to the lightning connector 1 (the bypass conductive portion 2), the first conductive piece 31A extends from the through hole peripheral portion 302A toward the opposing surface (one surface) 30Aa of the base 30A, and By being inserted between the surface R2 of the steel bar R and the opening peripheral portion 221a of one end portion 2a of the bypass conductive portion 2, the first conductive piece 31A abuts against the opening peripheral portion 221a, thereby restricting the range in which the steel bar R can tilt relative to the lightning connector 1 (bypass conductive portion 2), and thereby restricting tilt or misalignment of the first lightning connector 3A (base 30A and second conductive piece 32A) relative to the bypass conductive portion 2.

[0087] Furthermore, in either configuration of the first lightning connector 3A shown in Figure 15(a) or Figure 16(a), when the steel bar R attempts to move in the direction of arrow A and the base 30A or the first conductive piece 31A attempts to move toward the positions shown by the dotted lines in Figure 15(b) and Figure 16(b), each second conductive piece 32A attempts to move in a direction in which it is pressed against one end 2a (outer peripheral surface) of the detour conductive portion 2, and therefore the forces D12, D2 with which the multiple second conductive pieces 32A clamp the one end 2a of the detour conductive portion 2 from the outer periphery become larger, making it difficult for the first lightning connector 3A to come off (disengage) from the end 2a.

[0088] Furthermore, in the first lightning protection connector 3A of this embodiment, the second conductive pieces 32A are arranged at intervals in the circumferential direction on the outer periphery of the base 30A, and these multiple second conductive pieces 32A each extend toward the opposing surface (one surface) 30Aa of the base 30A, and when the base 30A is placed on the opening peripheral portion 221a so that the opposing surface 30Aa faces the opening peripheral portion 221a, the elastic force clamps one end 2a of the bypass conductive portion 2 from the outer periphery.

[0089] In this manner, by sandwiching one end 2a of the detour conductive portion 2 from the outer periphery by the multiple second conductive pieces 32A, electrical continuity is more reliably established between the second conductive piece 32A and the detour conductive portion 2. Moreover, since the first lightning connector 3A can be attached (fixed) to the detour conductive portion 2 without using any fastening member such as a screw, the attachment work of the first lightning connector 3A to the detour conductive portion 2 becomes easier.

[0090] In addition, in the first lightning protection connector 3A of this embodiment, the steel bar R has a surface R2 extending in the extension direction of the steel bar R at at least one circumferential portion, and the first conductive piece 31A is arranged at a position corresponding to the surface R2 of the steel bar R in the circumferential direction of the through hole peripheral portion 302A.

[0091] According to this configuration, when the steel bar R is inserted into the bypass conductive section 2 through the through hole 301A of the first lightning connector 3A, the first conductive piece 31A is pressed against the surface R2 of the steel bar R, making it easier to ensure the contact area between the first conductive piece 31A and the steel bar R, thereby more reliably establishing conductivity between the first conductive piece 31A and the steel bar R.

[0092] In addition, in the first lightning protection connector 3A of this embodiment, the steel bar R has surfaces R2 at multiple circumferential positions, and the first conductive pieces 31A and the second conductive pieces 32A are each arranged in multiple numbers, and the number of second conductive pieces 32A is greater than the number of first conductive pieces 31A.

[0093] Since the first conductive piece 31A contacts the surface R2 of the steel bar R, whereas the second conductive piece 32A contacts the peripheral surface of the detour conductive portion 2, the contact area between one second conductive piece 32A and the detour conductive portion 2 (periphery) is likely to be smaller than the contact area between one first conductive piece 31A and the steel bar R (surface R2). However, as in the first lightning connector 3A of this embodiment, by making the number of second conductive pieces 32A greater than the number of first conductive pieces 31A, the total contact area between the second conductive pieces 32A and the detour conductive portion 2 increases, and as a result, a contact area approximately the same as the contact area between the first lightning connector 3A and the steel bar R can be secured between the first lightning connector 3A and the detour conductive portion 2.

[0094] Furthermore, in the first lightning protection connector 3A of this embodiment, the first conductive pieces 31A extend from opposite positions on either side of the through hole 301A in the through hole peripheral portion 302A, and the dimension L1 along the first conductive piece 31A from the base end to the tip of the first conductive piece 31A may be smaller than half the distance β3 between the base ends of the first conductive pieces 31A at the opposing positions.

[0095] By setting the length of the first conductive piece 31A to this dimension L1, it becomes possible to form the first lightning connector 3A from a single plate-shaped member (see Figures 2, 3, and 5), further simplifying the configuration.

[0096] Furthermore, in the second lightning protection connector 3B of this embodiment, the second conductive piece 32B extends from the through hole peripheral portion 302B and has a convex portion 320B that protrudes toward the outside of the through hole 301B when viewed from the penetration direction of the through hole 301B, and the convex portion 320B engages with the opening peripheral portion 221b by causing the second conductive piece 32B to return or attempt to return to its shape before elastic deformation due to an elastic force generated in the second conductive piece 32B when the base 30B is placed over the opening peripheral portion 221b so that the opposing surface (one surface) 30Ba faces the opening peripheral portion 221b.

[0097] According to this configuration, by overlapping the base 30B of the second lightning connector 3B with the opening peripheral portion 221b of the bypass conductive portion 2, the second conductive piece 32B and the opening peripheral portion 221b of the bypass conductive portion 2 can be engaged with each other, thereby facilitating the installation work of the second lightning connector 3B to the bypass conductive portion 2.

[0098] In addition, the lightning connection body 1 of this embodiment is a lightning connection body 1 that is embedded together with a steel bar R in a precast concrete block in which the steel bar R is embedded, and that provides electrical conductivity between the steel bars R of adjacent precast concrete blocks in the extension direction of the steel bar R, and is equipped with a bypass conductive section 2 that is cylindrical with openings at both ends and into which the steel bar R is inserted through the openings 21a, 21b, at least the portion that provides electrical conductivity, and a lightning connector 3 (first lightning connector 3A, second lightning connector 3B) that provides electrical conductivity between the ends 2a, 2b of the bypass conductive section 2 and the steel bar R. The lightning connector 3 is a plate-shaped base 30 having a through hole 301 in the center and extending in a planar direction perpendicular to the penetration direction of the through hole 301, and has the base 30 into which a steel bar R is inserted while being overlapped on the opening peripheral portions 221a, 221b of the bypass conductive portion 2, a first conductive piece 31 extending from the through hole peripheral portion 302 of the base 30 toward the opposing surface (one surface) 30a of the base 30, and a second conductive piece 32 extending from the through hole peripheral portion 302 or the outer periphery of the base 30 toward the opposing surface 30a of the base 30. In addition, when the steel bar R is inserted into the bypass conductive portion 2 through the through hole 301, the first conductive piece 31 is pressed against the steel bar R by an elastic force generated when the first conductive piece 31 is pushed by the steel bar R toward the outside of the through hole 301 as viewed from the penetration direction, and the second conductive piece 32 engages with the bypass conductive portion 2 by an elastic force generated when the first conductive piece 31 is pushed by the opening peripheral portion 221b so as to be elastically deformed toward the inside of the through hole 301 as viewed from the penetration direction, or by an elastic force generated when the second conductive piece 32 is pushed by the end portion 2a of the bypass conductive portion 2 so as to be elastically deformed toward the outside of the base 30 as viewed from the penetration direction, when the base 30 is placed over the opening peripheral portions 221a, 221b so that the opposing surface 30a faces the opening peripheral portions 221a, 221b, and the base 30, the first conductive piece 31 and the second conductive piece 32 are integral.

[0099] In this way, by integrating the base 30, the first conductive piece 31, and the second conductive piece 32, it is possible to simplify the configuration of the lightning connection body 1 (more specifically, the lightning connector 3). Moreover, when the lightning connector 3 is arranged in the detour conductive section 2, the first conductive piece 31 is pressed against the steel bar R by the elastic force generated in the first and second conductive pieces 31, 32, and the second conductive piece 32 engages with the detour conductive section 2, thereby ensuring electrical continuity between the steel bar R and the detour conductive section 2. Therefore, by arranging the lightning connectors 3 on both ends of the detour conductive section 2, it is possible to ensure electrical continuity between the steel bars R inserted into both ends (respective openings 21a, 21b) of the detour conductive section 2.

[0100] In addition, in the lightning protection connection body 1 of this embodiment, in the first lightning protection connector 3A, the first conductive piece 31A extends from the through hole peripheral portion 302A to the opposing surface (one surface) 30Aa of the base 30A, and the second conductive piece 32A extends from the outer periphery of the base 30 to the opposing surface 30Aa of the base 30.

[0101] According to this configuration, when the steel bar R attempts to move in a direction to come out of the bypass conductive portion 2, the first conductive piece 31A in the first lightning connector 3A attempts to move in a direction to be pressed against the steel bar R (see the dotted line in Figure 16(b) and the arrows D1 in Figures 16(a) and 16(b)), and the multiple second conductive pieces 32A attempt to more firmly clamp one end 2a of the bypass conductive portion 2 (see the arrows D2 in Figures 16(a) and 16(b)). As a result, the steel bar R becomes less likely to come out of the first lightning connector 3A and the first lightning connector 3A becomes less likely to come out (disconnect) from the bypass conductive portion 2.

[0102] In addition, in the lightning connection body 1 of this embodiment, the steel bar R has a surface R2 extending in the extension direction of the steel bar R at at least one circumferential position, and the opening 21a of the bypass conductive portion 2 is circular and has a diameter α1 corresponding to the diameter γ of the steel bar R when the surface R2 is not present, and in the first lightning connector 3A, the first conductive piece 31A is arranged at a position corresponding to the circumferential surface R2 of the steel bar R at the through hole peripheral portion 302A, and may extend to the inside of the bypass conductive portion 2 by passing between the surface R2 of the steel bar R and the opening peripheral portion 221a.

[0103] In this way, the first conductive piece 31A is inserted by utilizing the gap (between surface R2 and the opening peripheral portion 221a of the bypass conductive portion 2) that is generated when the steel bar R having surface R2 is inserted into the circular opening 21a of the bypass conductive portion 2. This makes it possible to eliminate the need to form a separate hole or gap for inserting the first conductive piece 31A at the boundary between the steel bar R and the opening peripheral portion 221a of the bypass conductive portion 2, even if the first conductive piece 31A of the first lightning protection connector 3A extends from the through hole peripheral portion 302A toward the opposing surface 30Aa of the base 30A.

[0104] Furthermore, since the steel bar R has a surface R2 and therefore has a non-circular cross-sectional shape, when the steel bar R is inserted into one of the openings 21a of the bypass conductive section 2, a gap is formed between the opening peripheral portion 221a of the opening 21a and the surface R2 of the steel bar R. However, by inserting the first conductive piece 31A into this gap, the gap is reduced, and concrete is more effectively prevented from getting between the bypass conductive section 2 and the steel bar R when the block B is manufactured.

[0105] Furthermore, in the lightning protection connection body 1 of this embodiment, in the bypass conductive portion 2, the opening peripheral portion 221b has a step surface 221D that extends in an inner circumferential direction and faces inward in the opening direction, and in the second lightning protection connector 3B, the second conductive piece 32B extends from the through hole peripheral portion 302B and has a protrusion 320B that protrudes toward the outside of the through hole 301B when viewed from the through direction, and the protrusion 320B engages with the step surface 221D as the second conductive piece 32B returns or attempts to return to its shape before elastic deformation due to the elastic force exerted when the base 30B is placed on the opening peripheral portion 221b so that the opposing surface (one surface) 30Ba faces the opening peripheral portion 221b.

[0106] According to this configuration, by overlapping the base 30B of the second lightning connector 3B with the opening peripheral portion 221b of the bypass conductive portion 2, the second conductive piece 32B and the opening peripheral portion 221b of the bypass conductive portion 2 can be engaged with each other, thereby facilitating the installation work of the second lightning connector 3B to the bypass conductive portion 2.

[0107] The lightning connector and lightning connection body of the present invention are not limited to the above-mentioned embodiment, and various modifications can be made without departing from the scope of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, and part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Furthermore, part of the configuration of one embodiment can be deleted.

[0108] In the lightning connector 3 of the above embodiment, the first conductive piece 31 extends from the base 30 to the opposing surface (one surface) 30a of the base 30, but is not limited to this configuration. The first conductive piece 31 may extend from the base 30 to the surface (the other surface) 30b opposite to the opposing surface 30a of the base 30.

[0109] In addition, in the first lightning connector 3A of the above embodiment, there are two first conductive pieces 31A, but this configuration is not limited to this. The first lightning connector 3A may have one first conductive piece 31A, or three or more first conductive pieces 31A. That is, the first lightning connector 3A only needs to have at least the same number of first conductive pieces 31A as the number of faces R2 of the steel bar R.

[0110] In addition, the specific shape of the first conductive piece 31A of the first lightning connector 3A in the above embodiment is not limited. Note that, when the first conductive piece 31A of the first lightning connector 3A extends from the base 30A to the opposing surface (one surface) 30Aa of the base 30A, it may have any shape as long as it can be inserted between the surface R2 of the steel bar R and the opening peripheral portion 221a of the detour conductive portion 2 when the first lightning connector 3A is attached to one end portion 2a of the detour conductive portion 2 and can secure a contact area with the surface R2 of the steel bar R.

[0111] In addition, the specific shape of the second conductive pieces 32A of the first lightning connector 3A in the above embodiment is not limited as long as the second conductive pieces 32A have a shape that sandwiches the one end 2a of the detour conductive part 2 from the outer periphery when the first lightning connector 3A is attached to the one end 2a of the detour conductive part 2.

[0112] In the first lightning connector 3A of the above embodiment, the number of second conductive pieces 32A is greater than the number of first conductive pieces 31A, but this is not limited to the configuration. In the first lightning connector 3A, the number of second conductive pieces 32A may be the same as the number of first conductive pieces 31A, or may be less than the number of first conductive pieces 31A. [Explanation of symbols]

[0113] 1...lightning connector, 2...bypass conductive portion, 2a...one end, 2b...other end, 21a...one opening, 21b...other opening, 22...conductive portion main body, 22a...one end, 22b...other end, 221a, 221b...opening periphery, 221D...step surface, 23...packing, 3...lightning connector, 3A...first lightning connector (lightning connector), 3B...second lightning connector (lightning connector) , 30, 30A, 30B... base portion, 30a, 30Aa, 30Ba... opposing surface (one surface), 30b, 30Ab, 30Bb... surface opposite the opposing surface (the other surface), 301, 301A, 301B... through hole, 302, 302A, 302B... through hole peripheral portion, 303, 303A... outer peripheral portion (outer peripheral portion), 31, 31A, 31B... first conductive piece, 311B... extension portion, 312B... inclined portion, 32, 32 A, 32B... second conductive piece, 320B... convex portion, 321A... base end portion, 322A... tip end portion, Ar1... area surrounded by bent portion, B... precast concrete block, B1... upper end surface, B2... lower end surface, C... imaginary circle passing through the tip of each convex portion, L1... length dimension of first conductive piece, M... mortar, R... steel bar, R1... projection, R2... surface, α1... inner diameter (diameter) of one opening, α2... inner diameter of the other opening, α5: Outer diameter of the conductive portion body (detour conductive portion), β1: Outer diameter of the base of the first lightning connector, β2: Inner diameter of the through hole of the first lightning connector, β3: Distance between the base ends of the first conductive pieces in the first lightning connector, β5: Outer diameter of the base of the second lightning connector, β6: Inner diameter of the through hole of the second lightning connector, γ: Diameter of the steel bar, φ1: Diameter of the area surrounded by each bent portion, φ2: Diameter of an imaginary circle passing through the tip of each convex portion

Claims

1. A lightning connector for electrically connecting a cylindrical bypass conductive part having electrical conductivity and open ends to a steel bar having an end inserted into the bypass conductive part, a plate-shaped base having a through hole in a central portion and extending in a plane direction perpendicular to a penetration direction of the through hole, the base being overlapped with an opening peripheral portion of the bypass conductive portion and into which the steel bar is inserted; A first conductive piece extending from a peripheral portion of the through hole of the base to one surface side or the other surface side of the base; a second conductive piece extending from the through hole peripheral portion or a portion of the base portion that is outer circumferentially away from the through hole peripheral portion toward one surface of the base portion, When the steel bar is inserted into the bypass conductive portion through the through hole, the first conductive piece is pressed against the steel bar by an elastic force generated by the steel bar being pushed by the steel bar toward the outside of the through hole as viewed from the penetration direction, and elastic deformation is generated. when the base is placed on the opening peripheral portion so that the one surface faces the opening peripheral portion, the second conductive piece engages with the bypass conductive portion by an elastic force generated by the second conductive piece being pressed by the opening peripheral portion so as to be elastically deformed toward the inside of the through hole as viewed from the penetration direction, or by an elastic force generated by the second conductive piece being pressed by an end of the bypass conductive portion so as to be elastically deformed toward the outside of the base as viewed from the penetration direction, A lightning protection connector, wherein the base, the first conductive piece, and the second conductive piece are integral with each other.

2. The lightning protection connector according to claim 1 , wherein the first conductive piece extends from a peripheral portion of the through hole toward one surface side of the base.

3. The second conductive pieces are arranged at intervals in the circumferential direction in the outer circumferential portion, The lightning protection connector of claim 2, wherein the multiple second conductive pieces each extend toward one side of the base, and when the base is placed over the peripheral edge of the opening so that the one side faces the peripheral edge of the opening, the elastic force clamps the end of the bypass conductive portion from the outer periphery.

4. The steel bar has a surface extending in an extension direction of the steel bar at at least one portion in a circumferential direction, The lightning protection connector according to claim 1 , wherein the first conductive piece is arranged at a position corresponding to a surface of the steel bar in a circumferential direction of the peripheral portion of the through hole.

5. The steel bar has the surface at each of a plurality of positions in the circumferential direction, The first conductive piece and the second conductive piece are each arranged in a plurality of pieces, The lightning protection connector according to claim 4 , wherein the number of the second conductive pieces is greater than the number of the first conductive pieces.

6. The first conductive pieces extend from opposite positions on the periphery of the through hole, The lightning protection connector according to claim 1, wherein the dimension along the first conductive piece from the base end to the tip end of the first conductive piece is smaller than half the distance between the base ends of the first conductive pieces at the opposing positions.

7. the second conductive piece has a protrusion extending from a peripheral portion of the through hole and protruding outward from the through hole as viewed in the penetration direction, The lightning protection connector as described in claim 1, wherein the convex portion engages with the opening peripheral portion by causing the second conductive piece to return or attempt to return to its shape before elastic deformation due to the elastic force when the base is placed over the opening peripheral portion so that the one surface faces the opening peripheral portion.

8. A lightning connector that is embedded in a precast concrete block with embedded steel bars and that conducts electricity between the steel bars of adjacent precast concrete blocks in the extension direction of the steel bars, At least the portion that performs the conduction is conductive, the bypass conduction portion is tubular with both ends open, and the steel bar is inserted through the openings; a lightning connector at an end of the bypass conductive portion for electrically connecting the end and the steel bar; The lightning connector comprises: a plate-shaped base having a through hole in a central portion and extending in a plane direction perpendicular to a penetration direction of the through hole, the base being overlapped with an opening peripheral portion of the bypass conductive portion and into which the steel bar is inserted; A first conductive piece extending from a peripheral portion of the through hole of the base to one surface side or the other surface side of the base; a second conductive piece extending from the through hole peripheral portion or a portion of the base portion that is on the outer circumferential side of the through hole peripheral portion toward one surface of the base portion, When the steel bar is inserted into the bypass conductive portion through the through hole, the first conductive piece is pressed against the steel bar by an elastic force generated by the steel bar being pushed by the steel bar toward the outside of the through hole as viewed from the penetration direction, and elastic deformation is generated. when the base is placed on the opening peripheral portion so that the one surface faces the opening peripheral portion, the second conductive piece engages with the bypass conductive portion by an elastic force generated by the second conductive piece being pressed by the opening peripheral portion so as to be elastically deformed toward the inside of the through hole as viewed from the penetration direction, or by an elastic force generated by the second conductive piece being pressed by an end of the bypass conductive portion so as to be elastically deformed toward the outside of the base as viewed from the penetration direction, A lightning protection connection body, wherein the base, the first conductive piece, and the second conductive piece are integral with each other.

9. The first conductive piece extends from a peripheral portion of the through hole to one surface side of the base, The lightning connection body according to claim 8 , wherein the second conductive piece extends from the outer circumferential portion toward one surface of the base portion.

10. The steel bar has a surface extending in an extension direction of the steel bar at at least one portion in a circumferential direction, The opening of the bypass conductive portion is a circle having a diameter corresponding to a diameter of the steel bar in the absence of the surface, The lightning connection body described in claim 9, wherein the first conductive piece is arranged at a position corresponding to the circumferential surface of the steel bar at the peripheral portion of the through hole, and extends between the surface of the steel bar and the peripheral portion of the opening to the inside of the bypass conductive portion.

11. The opening peripheral portion has a step surface extending in an inner circumferential direction and facing inward in the opening direction, the second conductive piece has a protrusion extending from a peripheral portion of the through hole and protruding outward from the through hole as viewed in the penetration direction, The lightning connection body described in claim 8, wherein the convex portion engages with the step surface by causing the second conductive piece to return or attempt to return to its shape before elastic deformation due to the elastic force when the base is placed over the opening peripheral portion so that the one surface faces the opening peripheral portion.

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