JP5104571B2 - Structure for electrically connecting reinforcing bars, Method for electrically connecting reinforcing bars - Google Patents

Description

  The present invention relates to a method and a structure for forming a joint between reinforcing bars by a sleeve joint embedded in a PCa member and electrically connecting the reinforcing bars to each other.

  Conventionally, in a reinforced concrete column beam structure, a reinforcing bar embedded in a column member has been used as a pulling down conductor that releases current received by a lightning rod to the ground. However, when constructing a reinforced concrete column using PCa members, when forming a joint between reinforcing bars with a sleeve joint, it is necessary to fill the sleeve joint with grout, and the electrical connection between the reinforcing bars Can not be secured. For this reason, when building a building using PCa members, it is conceivable to install a lead wire connecting the lightning rod to the ground in order to release the current received by the lightning rod to the ground. Necessary and time-consuming to construct.

Therefore, for example, in Patent Document 1, when joining the PCa members in which the column main bars are embedded, a joint between the column main bars is formed by a sleeve joint attached to the column main bars of any one of the PCa members. A method of electrically connecting the column main bars of the PCa members built up and down by attaching conductive wires to the column main bars of each PCa member so as to protrude from the joint end face and connecting the conductive wires to each other Is described.
JP-A-8-291642

  However, in the method described in Patent Document 1, when manufacturing the PCa member, one end of the conducting wire must be connected to the reinforcing bar, and the other end must be disposed so as to reliably protrude from the lower surface of the member. It takes a lot of work to make. Moreover, it is necessary to secure a space through which the conducting wire passes in the PCa member, which makes it difficult to perform bar arrangement work. Furthermore, when building the PCa member, it is necessary to perform an operation of connecting the conductors of the upper and lower PCa members between the upper and lower PCa members, which takes time and labor.

  The present invention has been made in view of the above-described problems, and its object is to secure a space for newly providing a conducting wire in a PCa member when a reinforcing bar joint is formed by a sleeve joint embedded in the PCa member. It is an object to provide a method and a structure for securing an electrical connection between reinforcing bars, which is unnecessary and does not require the production and construction of members.

  In the structure for electrically connecting the reinforcing bars of the present invention, the first reinforcing bar and the second reinforcing bars respectively inserted from both ends of the conductive sleeve joint embedded in the PCa member are electrically connected. The sleeve joint is formed with a thread on the inner peripheral surface that penetrates the side surface of the portion where the first reinforcing bar is inserted and the side surface of the portion where the second reinforcing bar is inserted. Each screw hole is provided, and a screw member having conductivity is screwed into each screw hole so as to abut on the first and second reinforcing bars. The screw member includes a bolt having a thread formed on the outer periphery.

In the above method, the first reinforcing bar is embedded in the PCa member, and one end of the sleeve joint opens in the surface of the PCa member, or in a hole provided in the surface of the PCa member. An opening is provided, and the second reinforcing bar may be inserted from the one end of the sleeve joint.
The second reinforcing bar is embedded in a PCa member different from the PCa member so that an end portion protrudes from an end surface of the PCa member, and an end portion protruding from the end surface of the member is an end of the sleeve joint. May be inserted.

  The PCa member is a lower PCa column member that constitutes a lower column of a column beam joint, and the first reinforcing bar is embedded in the lower PCa column member, One end opens on the upper surface of the lower PCa column member, or opens in a hole provided on the upper surface of the lower PCa column member, and the second rebar is connected to the column beam joint portion. The sleeve is embedded in the upper PCa column member constituting the upper column so as to protrude from the lower surface of the upper PCa column member, and the protruding portion passes through the concrete constituting the column beam joint, and the sleeve It may be inserted from one end of the joint.

  Further, the concrete constituting the column beam joint portion connects the sheath tube embedded in the vertical direction, the beam main bar embedded in the horizontal direction, and the sheath tube and the beam main bar. The second rebar is inserted into the sheath tube, and the sheath tube has a screw hole penetrating the side surface formed with a thread on the inner peripheral surface. An electrically conductive screw member may be screwed into the screw hole so as to come into contact with the second reinforcing bar.

  Further, the screw hole has a thread on an inner peripheral surface formed in advance on a conductive metal fitting attached to a pouring hole formed for injecting or discharging grout on a side surface of the sleeve joint in advance. It may be a hole.

  In addition, a conductive brush or a conductive flexible member is provided at the tip of the screw member, and the brush or the flexible member comes into contact with the first and second reinforcing bars. Further, the brush or the flexible member may be provided to be rotatable with respect to the screw member.

  The screw member has a polygonal recess formed in the head, and a rod-like member having a polygonal cross section corresponding to the recess is rotated with its end fitted into the recess. It may be tightened by making.

  Moreover, the method of electrically connecting the reinforcing bars of the present invention is the method of electrically connecting the first reinforcing bar and the second reinforcing bar respectively inserted from both ends of the sleeve joint having conductivity embedded in the PCa member. The sleeve joint is threaded on the inner peripheral surface so as to penetrate the side surface of the portion where the first reinforcing bar is inserted and the side surface of the portion where the second reinforcing bar is inserted. A screw hole in which a strip is formed is provided, and a hole for connecting the screw hole of the buried sleeve joint and the surface of the PCa member is formed in the PCa member. The screw member having conductivity is screwed through the hole of the PCa member so that the tips thereof are in contact with the first and second reinforcing bars, respectively.

  Moreover, the method of electrically connecting the reinforcing bars of the present invention is the method of electrically connecting the first reinforcing bar and the second reinforcing bar respectively inserted from both ends of the sleeve joint having conductivity embedded in the PCa member. The sleeve joint is injected or discharged with grout so as to penetrate the side surface of the portion where the first rebar is inserted and the side surface of the portion where the second rebar is inserted. A drainage hole formed for the purpose is formed, and a conductive metal fitting having a threaded hole is attached to the drainage hole. The PCa member is provided with the injection hole of the sleeve joint embedded therein. A hole for connecting the exhaust hole and the surface of the PCa member is formed, and a screw member having conductivity is passed through the hole of the PCa member through each of the threaded holes. Threaded into contact with the two reinforcing bars The features.

  According to the present invention, the reinforcing bars are electrically connected to each other via the sleeve joint and the screw that is screwed into the hole formed in the sleeve joint, so that a space for providing the conductor in the PCa member is secured. There is no need. Further, since the PCa member may be configured such that the screw is fastened to the hole of the sleeve joint, it does not take time to manufacture the PCa member. Moreover, since the work newly required at the time of construction is only the screw tightening work, it does not take time for construction.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
1A and 1B are views showing a sleeve joint 110, in which FIG. 1A is a perspective view and FIG. 1B is an axial sectional view. The sleeve joint 110 is used when jointing the reinforcing bars embedded in the PCa member when the column beam frame is constructed by joining the PCa member. The sleeve joint 110 is used by being embedded in the PCa member in advance. It is done. As shown in the figure, the sleeve joint 110 is made of a steel material formed in a cylindrical shape, and has a narrow-diameter side rebar insertion hole 111 and a large-diameter wide-mouth side rebar insertion hole at each end. 112 is formed. An annular partition 113 is provided along the inner peripheral surface at the center in the axial direction. By this partition 113, the internal space of the sleeve joint 110 is partitioned into a narrow space 116 and a wide space 117. It has been. In addition, holes 114 and 115 are formed on the side surfaces of the sleeve joint 110 as the grout injection holes and the discharge holes, respectively, and communicate with the narrow-side space 116 and the wide-side space 117, respectively. Are formed with cylindrical tube portions 114A and 115A. In addition to the grout injection hole and the discharge hole, holes 118 and 119 each having a thread formed on the inner peripheral surface thereof are formed so as to communicate with the narrow space 116 and the wide space 117, respectively. Yes.

  FIG. 2 is a view showing a state in which the joints of the reinforcing bars 101 and 102 are formed using the sleeve joint 110, and the reinforcing bars 101 and 102 are electrically joined. FIG. 2A is a perspective view, and FIG. It is an axial sectional view. As shown in the figure, in order to form the joints of the reinforcing bars 101 and 102 using the sleeve joint 110, first, the reinforcing bars 101 and 102 are inserted into the reinforcing bar insertion holes 111 and 112 on the narrow mouth side and the wide mouth side, respectively. . Then, the conductive bolts 103 and 104 are screwed into the holes 118 and 119 formed on the side surface of the sleeve joint 110, and tightened until their tips come into contact with the outer peripheral surfaces of the reinforcing bars 101 and 102. Then, the grout 103 is injected into the sleeve joint 110 from the hole 114 located below. When the injected grout 103 is hardened, a joint of the reinforcing bars 101 and 102 is formed.

  Here, the conductive bolts 103 and 104 are electrically connected to the sleeve joint 110 made of steel, and the bolts 103 and 104 have their tips abutting against the reinforcing bars 101 and 102, respectively. It touches. For this reason, the reinforcing bars 101 and 102 are electrically connected via the bolts 103 and 104 and the sleeve joint 110.

  In the above embodiment, the case where the holes 118 and 119 for tightening the bolts 103 and 104 are formed on the side where the holes 114 and 115 of the sleeve joint 110 are provided has been described. As shown, it may be provided on the side opposite to the side where the holes 114 and 115 are provided, or the position where the bolts 103 and 104 tightened in the holes 118 and 119 can come into contact with the reinforcing bars 101 and 102. If so, it may be provided anywhere on the side. A plurality of these holes 118 and 119 may be provided.

Second Embodiment
Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings.
In the present embodiment, in the method of constructing a column by joining PCa column members, when the column main bar joint of each PCa column member is formed by a sleeve joint having conductivity, the column main bars are electrically connected to each other. The case of connecting to will be described.

  In addition, although 1st Embodiment demonstrated the case where the sleeve coupling provided with the hole by which the screw thread was formed in the inner peripheral surface for tightening a volt | bolt separately from the injection hole and discharge | emission hole of grout was used, In the embodiment, a sleeve joint that does not include a hole in which a thread is formed on the inner peripheral surface is used.

  4A and 4B are views showing the sleeve joint 10, wherein FIG. 4A is a perspective view and FIG. 4B is an axial sectional view. As shown in the figure, the sleeve joint 10 is made of a steel material formed in a cylindrical shape. Each end has a narrow-diameter side reinforcing bar insertion hole 11 and a large-diameter wide opening side reinforcing bar insertion hole. 12 are formed. An annular partition portion 13 is provided along the inner peripheral surface at the axially central portion, and the partition portion 13 divides the internal space of the sleeve joint 10 into a narrow-side space 16 and a wide-side space 17. It has been. Further, holes 14 and 15 are formed on the side surfaces of the sleeve joint 10 so as to communicate with the narrow space 16 and the wide space 17 respectively. 15A is formed. The holes 14 and 15 provided in these side surfaces are provided in advance as grout injection holes and discharge holes when the grout is injected into the existing sleeve joint 10.

In the present embodiment, the bolts can be tightened by attaching the mounting hardware including the holes in which the threads are formed to the holes 14 and 15 provided in advance as such grout injection holes and discharge holes. I have to.
FIG. 5 is a diagram showing how the attachment hardware 41 is attached to the holes 14 and 15 for attaching the attachment hardware 41. As shown in the figure, mounting hardware 41 is attached to the side holes 14 and 15 of the sleeve joint 10 so as to sandwich an elastic rubber ring 40 therebetween. The mounting hardware 41 is a member that includes a hole 42 formed with a screw thread at the center and a wall 43 that is obliquely erected outward along the outer periphery, and the wall 43 is a cylindrical portion of the sleeve joint 10. It is attached so as to contact 14A and 15A. Such mounting hardware 41 is formed by, for example, cutting a disk-shaped hardware having a threaded hole in the inner peripheral surface at the center with an appropriate interval between the outer peripheral edges, It can be formed by bending the portion 41 in an oblique direction. With this configuration, since the bent wall portion 43 presses the inner peripheral surfaces of the cylinder portions 14A and 15A in a state where the attachment hardware 41 is attached to the holes 14 and 15, the inside of the attachment hardware 41 and the cylinder portions 14A and 15A In addition to ensuring contact with the peripheral surface, it is possible to prevent the fitting 41 from coming off due to the filling pressure of the grout in the step of filling the grout into the sleeve joint 10 described later. Further, since the rubber ring 40 is interposed between the fitting 41 and the inner peripheral surfaces of the cylindrical portions 14A and 15A, the concrete overflows into the sleeve joint 10 when the PCa member is manufactured, and the sleeve joint 10 It is possible to prevent the filled grout from overflowing.

Hereinafter, a method of electrically connecting column main bars using the above-described sleeve joint in a method of constructing a column by joining PCa column members to each other will be described.
6A and 6B are diagrams illustrating the configuration of the PCa column members 20 and 30, in which FIG. 6A is a vertical cross-sectional view, and FIG. 6B is an enlarged view of a portion B in FIG. As shown in FIG. 2A, the upper and lower PCa column members 20, 30 are embedded in the members so as to extend in the vertical direction, and the column main bars 21, 31 whose lower ends protrude from the lower surface of the member are narrow. The distal end of the columnar reinforcing bars 21 and 31 is inserted into the internal space 16 from the mouth side reinforcing bar insertion hole 11, and the wide mouth side reinforcing bar insertion hole 12 is provided with a sleeve joint 10 opened on the upper surface of the member. Grout injection holes 22 and 32 are formed in the PCa column members 20 and 30 so as to reach from the side surface to the lower surface. A fitting 41 is attached to each of the side holes 14 and 15 of the sleeve joint 10 so as to sandwich an elastic rubber ring 40 therebetween.

  As shown in FIG. 6B, through holes 23 and 33 are formed on the side surfaces of the PCa column members 20 and 30 so as to communicate with the holes 14 and 15 on the side surfaces of the sleeve joint 10. These through holes 23 and 33 can be easily formed by embedding a PVC pipe or the like at positions corresponding to the through holes 23 and 33 when the PCa pillar member is manufactured. A metal bolt 50 is screwed into the hole 42 of the fitting 41 attached to the holes 14 and 15 of the sleeve joint 10. Further, the bolt 50 screwed into the lower (narrow mouth side) hole 14 is tightened until the tip thereof comes into contact with the outer peripheral surface of the tip of the column main bars 21 and 31 located in the space 16 on the narrow mouth side. . In this embodiment, the bolt 50 to be screwed into the hole 14 on the lower side (narrow mouth side) is tightened in advance so that the tip comes into contact with the column main bars 21, 31. The bolts 50 may be tightened together when the bolts 50 are tightened to the mounting hardware 41 of the hole 14 above (wide-mouth side) of the sleeve joint 10 to be described later.

  As such a bolt 50, for example, a hexagon socket cap bolt in which a regular hexagonal recess 52 is formed in a head 51 of a screw 50 as shown in FIG. 7 is suitable. As shown in FIG. 8A, when a normal hexagonal bolt 150 is used, it is necessary to tighten the bolt 150 using a wrench 160 that can accommodate the head 151 of the bolt 150. The diameters of the through holes 23 and 33 provided in the members 20 and 30 must be large so that a wrench 160 having a diameter larger than the head 151 of the bolt 150 can be inserted. On the other hand, when the hexagon socket cap bolt is used, the bolt 50 is tightened by the hexagonal bar spanner 60 having the same cross section as the recess 52 formed in the head 51 of the bolt 50. This is because the diameters of the through holes 23 and 33 provided in the hole 30 and 30 need only be able to accommodate the bolt head 51 and can be kept small.

Hereinafter, a method for joining the PCa column members 20 and 30 described above will be described.
9-12 is a figure for demonstrating the method to join the PCa pillar members 20 and 30. FIG. 9 and 11, (A) is a vertical sectional view, and (B) is an enlarged view of a portion B in (A). 10 and 12 are enlarged cross-sectional views of the joint portions of the PCa column members 20 and 30. FIG.
First, as shown in FIG. 9, the upper PCa column member 20 is built so that its beam main bar 21 is inserted into the reinforcing bar insertion hole 12 on the wide-mouth side of the sleeve joint 10 of the lower PCa column member 30. As a result, the distal end portion of the beam main reinforcement 21 is accommodated in the space 17 on the wide-mouth side of the sleeve joint 10.

  Next, as shown in FIG. 10, a hexagonal bar wrench 60 is inserted into the through hole 33 formed in the lower PCa column member 30, and the hexagonal bar wrench 60 communicates with the space 17 on the wide-mouth side of the sleeve joint 10. The bolt 50 attached to the hole 15 via the attachment hardware 41 is tightened until the tip thereof comes into contact with the outer peripheral surface of the column main bar 21 of the upper PCa column member 20.

  Next, as shown in FIG. 11, a mold 70 is installed on the outer periphery of the joint 71 between the upper and lower PCa column members 20, 30, and the grout injection hole 22 formed in the upper PCa column member 20 is used. The grout 72 is filled into the joint 71. The grout 72 filled in the joint 71 flows into the sleeve joint 10 through the gap between the sleeve joint 10 and the column main reinforcement 21. At this time, as described above, since the fitting 41 is attached so that the rubber ring 40 is sandwiched between the holes 14 and 15 on the side surfaces of the sleeve joint 10, the grout 72 flowing into the sleeve joint 10 has the holes 14 and 15. It can prevent flowing out of the gap between 15 and the mounting hardware 41. Then, after the grout 72 is filled in each sleeve joint 10, the grout 72 can be filled continuously into the joint 71 by continuing the filling of the grout 72.

  Next, as shown in FIG. 12, a mortar 73 is filled into the through-hole 33 that leads to the holes 14 and 15 of the sleeve joint 10 formed in the lower PCa column member 30. In addition, when the mortar 73 filled in the hole is cured, the tightened bolt 50 can be prevented from being loosened.

  And the grout 72 with which said joint 71 and the sleeve joint 10 were filled hardens | cures, and PCa pillar members 20 and 30 are joined. By repeating the above steps, a plurality of PCa column members can be joined to construct a building column.

  According to the above configuration, the tip of the bolt 50 abuts on the column main bars 21 and 31, and the bolt 50 is screwed into the mounting hardware 41 attached to the sleeve joint 10, so that the column main bars 21 and 31 are Each is electrically connected to the sleeve joint 10 via the bolt 50 and the mounting hardware 41, and thus the column main bars 21 and 31 are electrically connected to each other via the sleeve joint 10.

  For this reason, all the column main reinforcements of the pillar of the constructed building will be electrically connected by joining the PCa pillar member using the joining method of the PCa pillar members 20 and 30 described above. Therefore, it is possible to use these column main bars as down conductors that transmit current received by a lightning rod or the like at the top of the building to the ground.

  As described above, according to the present embodiment, the column is provided via the mounting metal 41 attached to the holes 14 and 15 provided on the side surface of the sleeve joint 10 and the bolt 50 screwed into the hole 42 of the mounting metal 41. Since the main bars 21 and 31 can be electrically connected to each other, it is not necessary to provide a space for providing a pull-down conducting wire, and the PCa member can be easily created.

  Moreover, the work performed to electrically connect the column main bars 21 and 31 is only to tighten the bolt 50, and the work of installing the PCa column member 20 is the same as the case of joining ordinary PCa columns. Since it can be performed, workability can be improved. Furthermore, since this operation can be performed any time after the PCa column member 20 is installed and before the grout is filled in the sleeve joint 10, the workability can be further improved.

  In the present embodiment, the tip of the bolt 60 is brought into direct contact with the reinforcing bar. However, the present invention is not limited to this. For example, as shown in FIG. A metal brush 53 may be rotatably mounted, and as shown in FIG. 13B, a flexible metal 54 having conductivity such as lead can be rotated at the tip of the bolt 50, for example. It may be attached. Thus, by attaching the brush 53 and the flexible metal 54 to the tip of the bolt 50 so as to be rotatable, the reinforcing bar and the brush 53 or the metal 54 come into contact with each other when the bolt 50 is tightened. At this time, since the brush 53 or the metal 54 is deformed so as to follow the outer peripheral surface of the reinforcing bar, the contact area between the bolt 50 and the reinforcing bar can be increased.

  In the present embodiment, the mounting hardware 41 is attached to the holes 14 and 15 for injecting the grout previously formed in the sleeve joint 10, and the bolt 50 is fastened to the mounting hardware 41. Instead, as in the first embodiment, the sleeve joint 10 may be newly formed with a hole having a thread on the inner peripheral surface, and a bolt may be screwed into the hole.

  In the present embodiment, the sleeve joint 10 is embedded in the upper surface of the PCa column members 20 and 30 so that the reinforcing bar insertion hole 12 is opened, and the column main bars 21 and 31 are projected from the lower surface of the member. The column main bars 21 and 31 of the PCa column members 20 and 30 are protruded from the upper surface of the member, and the sleeve joint 10 is embedded in the lower surface of the PCa column members 20 and 30 so that the reinforcing bar insertion holes are opened. The present invention can also be applied when 20 and 30 are joined.

  Moreover, although this embodiment demonstrated the case where the sleeve coupling 10 was embed | buried so that the reinforcing bar insertion hole 12 might be exposed to the end surface of PCa members 20 and 30, not only this but the sleeve coupling 10 is PCA member inside. The PCa member is provided with a hole that can reach the sleeve joint 10 (that is, a hole that opens one end of the sleeve joint 10 at the bottom) even if it is embedded in the PCA member. Can be applied.

  Moreover, although this embodiment demonstrated as an example the case where PCa pillar members were joined directly, it is not restricted to this, As shown in FIG. 14, the upper PCa pillar which comprises the pillar which is above the joint part 80 is shown. The present invention can also be applied to the case where a joint between the column main bar 121 of the member 120 and the column main bar 31 of the lower PCa column member 30 constituting the column below the joint portion 80 is formed. In this case, the joint portion 80 may be constructed by hitting concrete on-site, or a PCa member constituting the joint portion 80 may be built.

  In the present embodiment, the case where the column main bars 21 and 31 of the PCa column members 20 and 30 are electrically connected to each other has been described. However, the present invention is not limited to this, and the beam main bars embedded in the PCa beam members constituting the beam. The present invention can also be applied when connecting each other.

  In addition, when the beam main bars are electrically connected in this way, the beam main bars and the column main bars may be further electrically connected at the joint. FIG. 15 is a cross-sectional view of a joint for explaining a method of electrically connecting a column main bar and a beam main bar, (A) is a vertical cross-sectional view, and (B) is a cross-sectional view taken along line BB in (A). It is sectional drawing. As shown in the figure, the joint portion 80 includes a lower PCa column member 30, a joint portion 80, a PCa beam / joint member 81 constituting a beam connected to the joint portion 80, and an upper portion. It is constructed using the PCa column member 120. In the PCa beam / joint member 81, a sheath tube 82 having conductivity is embedded at a position corresponding to the column main reinforcement, and the sheath tube 82 and the beam main reinforcement 91 are electrically connected by a conducting wire 83. Further, a hole 82A having a thread formed on the inner peripheral surface is provided on the side surface of the sheath tube 82, and a bolt 84 is attached to the hole 82A. Further, a through hole 92 is formed in the PCa beam / joint member 81 so as to reach the hole 82A of the sheath tube 82 from the side surface of the member.

  In order to electrically connect the column main bars 121 and 31 and the beam main bar 91, first, the PCa beam / joint member 81 is built above the lower PCa column member 30, and further, the upper PCa from above. The column member 120 is built such that the column main reinforcement 121 passes through the sheath tube 82 of the PCa beam / joint member 81 and the tip thereof reaches the sleeve joint 10 of the PCa column member 30 below.

  Next, the bolt 50 attached via the fitting 41 to the hole 15 communicating with the space 17 on the wide-mouth side of the sleeve joint 10 of the lower PCa column member 30 is connected to the column main reinforcement of the PCa column member 20 whose tip is upper. Tighten until 21 abuts on the outer peripheral surface. Further, the bolt 84 attached to the sheath tube 82 of the PCa beam / joint member 81 is tightened until the tip thereof comes into contact with the outer peripheral surface of the column main bar 121 of the upper PCa column member 20.

  Next, the joint 74 between the upper PCa member 120 and the PCa beam / joint member 81, the joint 73 between the PCa beam / joint member 81 and the lower PCa beam member 30, and the sleeve joint 10 Then, the grout 72 is filled in the sheath tube 82. And when this filled grout 72 hardens | cures, these PCa members will be joined.

  By joining the PCa members by the method described above, the column main reinforcement 121 of the upper PCa column member 120 and the sheath tube 82 are electrically connected via the bolts 84. Further, the sheath tube 82 and the beam main reinforcing bar 91 are connected via a conducting wire 83. For this reason, the column main reinforcement and beam main reinforcement of a building can be electrically connected.

  The column main bars are electrically connected to each other, the beam main bars are electrically connected to each other, and the column main bars and the beam main bars are electrically connected by the above-described method, thereby forming the column main bars constituting the building. And all the beam main bars are electrically connected. Thereby, a lattice-shaped pulling-down conducting wire can be formed.

It is a figure which shows the sleeve coupling which concerns on 1st Embodiment, (A) is a vertical sectional view, (B) is an enlarged view of the B section in (A). It is a figure which shows the state which formed the joint of reinforcing bars with a sleeve joint, and was electrically connected with these reinforcing bars, (A) is a vertical sectional view, (B) is an enlarged view of the B section in (A). . It is a figure which shows another example of the sleeve coupling which concerns on 1st Embodiment, (A) is a vertical sectional view, (B) is an enlarged view of the B section in (A). It is a figure which shows the sleeve coupling which concerns on 2nd Embodiment, (A) is a perspective view, (B) is an axial sectional view. It is a figure which shows a mode that an attachment metal fitting is attached so that a rubber ring may be inserted in the hole of the side surface of a sleeve joint. It is a figure which shows the structure of a PCa pillar member, (A) is a vertical sectional view, (B) is an enlarged view of the B section in (A). It is a perspective view which shows a hexagon socket cap bolt. (A) is a vertical sectional view showing a through hole formed in a PCa pillar member when a normal hexagon bolt is used, and (B) is formed in a PCa pillar member when a hexagon socket cap bolt is used. It is a vertical sectional view showing a through hole. It is the figure (the 1) for demonstrating the method of connecting a PCa pillar member, (A) is a vertical sectional view, (B) is an enlarged view of the B section in (A). It is FIG. (2) for demonstrating the method to join a PCa pillar member. It is a figure (the 3) for demonstrating the method of connecting a PCa pillar member, (A) is a vertical sectional view, (B) is an enlarged view of the B section in (A). It is FIG. (4) for demonstrating the method to join a PCa pillar member. (A) shows a bolt in which a metal brush having conductivity is rotatably attached to the tip, and (B) is a diagram showing a bolt in which a flexible metal having conductivity is rotatably attached to the tip. is there. It is a vertical sectional view showing the case where the column principal bars of the upper and lower PCa column members constituting the columns corresponding to the upper and lower sides of the joint portion are electrically connected. It is sectional drawing of the joint part for demonstrating the method of electrically connecting a column main reinforcement and a beam principal reinforcement, (A) is a vertical sectional view, (B) is BB sectional drawing in (A). .

Explanation of symbols

10, 110 Sleeve joint 11, 111 Reinforcing bar insertion holes 12, 112 (wide opening side) Reinforcing bar insertion holes 13, 113 Partitions 14, 15, 114, 115 Holes 16, 116 (narrow opening side) Space 17, 117 (Wide-mouth side) Space 20, 30, 120 PCa column member 21, 31, 121 Column main reinforcement 22, 32 Grout injection hole 23, 33, 92 Through hole 40 Rubber band 41 Mounting bracket 42 Hole 43 Wall 50 84 Bolt 51 Head 52 Recess 53 Conductive Brush 54 Conductive Flexible Member (Metal)
60 Hexagonal spanner 70 Formwork 71 Joint 72 Grout 73 Mortar 80 Joint part 81 PCa beam / joint member 82 Sheath tube 83 Conductor 91 Beam main reinforcement

Claims (11)

A structure in which the first rebar inserted from both ends of the conductive sleeve joint embedded in the PCa member and the second rebar are electrically connected to each other,
The sleeve joint is provided with a screw hole having a thread formed on an inner peripheral surface thereof, which penetrates the side surface of the portion into which the first reinforcing bar is inserted and the side surface of the portion into which the second reinforcing bar is inserted. ,
A structure for electrically connecting rebars, wherein a screw member having conductivity is screwed into each screw hole so as to abut on the first and second rebars. The structure of claim 1,
The first reinforcing bar is embedded in the PCa member,
One end of the sleeve joint opens on the surface of the PCa member, or opens in a hole provided on the surface of the PCa member,
The second rebar is inserted from the one end of the sleeve joint. The structure according to claim 2,
The second reinforcing bar is embedded in a PCa member different from the PCa member so that the end portion protrudes from the end face of the PCa member, and the end portion protruding from the end face of the member is inserted from one end of the sleeve joint. Structure characterized by being. The structure of claim 1,
The PCa member is a lower PCa column member that constitutes a lower column of a column beam joint, the first reinforcing bar is embedded in the lower PCa column member, and one end of the sleeve joint is Opened in the upper surface of the lower PCa pillar member, or opened in a hole provided in the upper surface of the lower PCa pillar member,
The second rebar is embedded in an upper PCa column member that constitutes an upper column of the column beam joint portion so as to protrude from the lower surface of the upper PCa column member, and the protruding portion is A structure characterized by being inserted from one end of the sleeve joint through the concrete constituting the column beam joint. The structure according to claim 4,
The concrete constituting the column beam joint is made up of a sheath pipe embedded so as to extend in the vertical direction, a beam main bar embedded so as to extend in the horizontal direction, and a conductor connecting the sheath pipe and the beam main bar. Comprising a PCa member with
The second rebar is inserted through the sheath tube,
The sheath tube is provided with a screw hole penetrating the side surface, in which a thread is formed on the inner peripheral surface,
A structure in which a screw member having conductivity is screwed into the screw hole so as to contact the second reinforcing bar. The structure according to any one of claims 1 to 5,
The screw hole is a hole having a thread on an inner peripheral surface formed in advance on a conductive metal fitting attached to a pouring hole formed on the side surface of the sleeve joint for injecting or discharging grout. A structure characterized by being. The structure according to any one of claims 1 to 6,
A conductive brush or a flexible member having conductivity is provided at the tip of the screw member, and the brush or the flexible member is in contact with the first and second reinforcing bars. Construction. The structure of claim 7,
The brush or the flexible member is provided to be rotatable with respect to the screw member. The structure according to any one of claims 1 to 8,
The screw member has a polygonal recess formed in the head, and rotates a rod-shaped member having a polygonal cross section corresponding to the recess with the end fitted in the recess. Structure characterized by being tightened by. A method of electrically connecting a first rebar and a second rebar inserted from both ends of a conductive sleeve joint embedded in a PCa member, respectively,
The sleeve joint has a screw hole in which a thread is formed on an inner peripheral surface so as to penetrate a side surface of a portion where the first reinforcing bar is inserted and a side surface of the portion where the second reinforcing bar is inserted. Set up
In the PCa member, a hole for connecting the screw hole of the buried sleeve joint and the surface of the PCa member is formed,
A method wherein the screw member having conductivity is screwed into each screw hole through the hole of the PCa member so that the tips thereof are in contact with the first and second reinforcing bars, respectively. A method of electrically connecting a first rebar and a second rebar inserted from both ends of a conductive sleeve joint embedded in a PCa member, respectively,
The sleeve joint has a pouring formed for injecting or discharging grout so as to penetrate the side surface of the portion where the first reinforcing bar is inserted and the side surface of the portion where the second reinforcing bar is inserted. A hole is formed, and a conductive hardware having a screw hole is attached to the pouring hole,
In the PCa member, a hole connecting the pouring hole of the buried sleeve joint and the surface of the PCa member is formed,
A method, wherein a screw member having conductivity is screwed into each screw hole so that a tip of the screw member comes into contact with the first and second reinforcing bars through the hole of the PCa member.