JP4448768B2 - Conductive connection unit and conductive connection method - Google Patents

Description

  The present invention relates to a conductive connection unit and a conductive connection method suitable for electrically connecting a conductive structural member used in a building such as a high-rise building. More specifically, the present invention relates to a decorative wall material, an edge rail, and a metal. Conductive connection unit and conductive connection that are effective when constructing a lightning protection system, lightning protection conductive structure, etc., by electrically connecting metal auxiliary structure materials called curtain walls such as decorative walls together with conductive wires with terminals It is about the method.

  It is common for steel towers and high-rise buildings of light transmission lines to receive lightning strikes, but with the spread of electronic technology in recent years, power receiving facilities, power wiring, communication wiring, TVs are also used in general offices and (collective) houses. In addition to various electrical equipment such as feeders, various electronic devices such as computer devices are deployed. In these electric facilities and electronic devices, since miniaturization and power saving are regarded as important, semiconductor elements and integrated circuits having a low surge withstand voltage are frequently used. Although it is naturally necessary to suppress the surge voltage with the electronic equipment itself, when a building receives a direct lightning strike, or a lightning strikes another building, a part of the lightning current is automatically transmitted through the power line or communication line. Even when entering a building, it is necessary to make the building and wiring equipotential in order to operate the device safely.

  However, in a high-rise building or the like, lightning is not always applied to the lightning rod at the top, and the metal frame body such as the curtain wall is not reliably electrically connected to each other. Lightning surge voltage enters from the inside, and a potential difference occurs inside the building itself due to the passage of the lightning current. These potential differences and flashover due to lightning surge, damage to equipment and facilities, fire, explosion, or human shock hazard, etc. There was a problem that caused.

  In order to prevent accidents and disasters when buildings such as high-rise buildings receive lightning strikes, as a countermeasure against lightning strikes by the equipotential bonding method, the inventors Has developed a conductive connection unit that electrically connects these conductors with a conductor connection device (see, for example, Patent Document 1).

  In addition, it forms a pipe joint consisting of a screw shaft having a square shaft portion at a substantially central portion in the longitudinal direction and a connection plug attached to the screw shaft, and the connection plug is fitted to the square shaft portion side of the screw shaft. A first tightening member having a substantially pyramid shape and having a wedge-shaped protrusion on the outer periphery, and a second tightening member screwed on the tip side of the screw shaft and having a substantially pyramid shape and having a wedge-shaped protrusion on the outer periphery. The split mold comprises a split sleeve that is fitted to the outer periphery of both tightening members so as to be expandable, and the connecting plug is inserted into a pipe to be connected and then rotated to bring the two tightening members closer to each other. There is a pipe joint (for example, Patent Document 2) in which a sleeve is expanded outward to be crimped to the inner surface of a pipe. In addition, there are (for example, Non-Patent Document 1) that define various rules for constructing a lightning protection system such as a building.

JP 2003-199239 A Japanese Patent Application Laid-Open No. 08-074823 Japan Industrial Standards Committee deliberation JIS A4201: 2003 "Lightning protection of buildings" revised on July 8, 2003

  As shown in FIG. 15 of the same document, the method using the conductive connection unit of [Patent Document 1] is a conductor connection device (in a building formed by incorporating a plurality of conductors such as reinforcing bars, steel frames, and beam bars). In the case of constructing a lightning protection system for a high-rise building of several hundred meters, it is electrically connected by using a reinforcing bar connecting device). In this method, since the curtain wall frame and the like are not electrically connected to each other, it is not possible to effectively protect the lightning surge voltage from entering from the side wall of the curtain wall frame or the like.

In addition, the pipe joint in [Patent Document 2] is a pipe joint having a system in which a connecting plug mounted on a screw shaft is inserted into a pipe and then radially expanded and crimped and fixed to the inner peripheral surface of the pipe. Further, it is possible to adopt a configuration in which a wedge-shaped protrusion is formed on the outer periphery of the tightening member to enter between the split surfaces of the split sleeve and expand the split sleeve.
However, in Patent Document 2, for example, in a pipe joint having the structure according to the embodiment in FIGS. 16 to 17 of the same document, when the outer diameter of the split sleeve 11 and the inner diameter of the pipe P are almost equal, the screw shaft The fastening member 12 of the connecting plug 3 attached to the screw shaft 1 or the split-type sleeve 11 and the fastening member 12 rotate together, and the slit 11a of the split-type sleeve 11 is widened to the inner peripheral surface of the pipe. There is a risk that it cannot be crimped. Therefore, if the pipe joint is applied as the tightening connection member when the conductive connection unit is attached to the grounded object such as a curtain wall, there is a big problem in terms of workability and workability.

  The present invention reliably connects a grounded object such as an aluminum curtain wall often used for a building exterior material to a metal structure such as a steel frame of a building that is regarded as a grounded object. In addition to providing a conductive connection unit that can provide a conductive connection, when performing construction work to connect and connect the conductive connection unit to the curtain wall, which is a grounded object, the tightening work is not performed by rotating the components together. `` Blind screw mechanism (common name) '' that can complete the tightening connection only by work from the side where the curtain wall is constructed, without needing to work by turning the hand to the back side of the curtain wall. It is an object of the present invention to provide a conductive connection unit comprising:

In the present invention, the following means are used to achieve the above object.
(1) A conductive member provided with a constituent member of an electric conductor / crimp terminal / clamping bolt / rotating square nut / nut restraining member, and disposed between the crimp terminal and the rotary square nut; A conductive connection unit for obtaining electrical connection from the conductive member by pinching by tightening the tightening bolt screwed into the rotating square nut through a through hole provided in the conductive member,
The crimp terminal includes a crimp portion for fixing the end portion of the electric conductor, and a flat plate portion having an insertion hole for inserting the guide body of the nut restraining member,
The nut restraining member has a U-shaped cross-section with a cap body having an annular shape on the outer peripheral side , and a disc-shaped flange portion fitted into the cap body, with a bifurcated and strip-shaped 2 on the lower surface. a guide member which guides part of the body is extended, but has been assembled integrally,
The cap body and the guide body have a bolt hole through which the tightening bolt is inserted, and are disposed between the head of the tightening bolt and the flat plate portion of the crimp terminal,
The guide body is then formed a shape that can pass through the through hole of said conductive member and said plate, two bodies that are additionally provided so as to extend on both sides of the clamping bolt is inserted from the cap body Having a guide part, and provided with a long groove part on the inner surface side of the guide part for the projection part of the rotating square nut to move along the tightening bolt;
The rotating type square nut is provided at both sides to be slidably and rotatably engaged with a screw portion for screwing with the tightening bolt and a long groove portion of the guide body at the center thereof. A protrusion, and
As for the mutual positional relationship between the guide body of the nut restraining member and the rotary square nut, the rotary square nut is housed in the two guide portions so that the through hole of the conductive member can be inserted. An arrangement at the time of insertion, and an arrangement at the time of tightening in which the rotation-type square nut can be rotated and screwed with the tightening bolt after insertion,
A projecting portion is formed on the outer peripheral side of the cap body of the nut restraining member, and the projecting portion is locked or collides with an end portion of the electric conductor or a crimping portion of the crimp terminal when the cap body is rotated. By being comprised so that it may become, it has the structure which prevents co-rotation of the said nut restraining member at the time of the said fastening bolt fastening.

(2) In the conductive connection unit of (1),
A loosening prevention member having an inner diameter corresponding to a through hole formed in the conductive member is interposed between the cap body and the flat plate portion of the crimp terminal, and is tightened with the tightening bolt.
(3) In the conductive connection unit of (2),
The shape of the loosening prevention member interposed between the cap body and the flat plate portion of the crimp terminal is an inner diameter equivalent to the hole diameter of the through hole, and the outer diameter is an outer diameter that can be stored in the cap body. In addition, when the tightening bolt is tightened, a disk-shaped flange is pressed and fixed to the bottom of the cap body by the loosening prevention member to prevent co-rotation.

( 4 ) In any one of the conductive connection units of (1) to ( 3 ),
The guide body includes a flat inner long surface on the inner surface side of the guide portion for contacting the flat outer surface on both sides of the rotating square nut to enable the moving operation and the rotating operation.
The long groove portion of the guide body is a long groove portion on a flat inner long surface for the protrusion of the rotating type square nut to move along the tightening bolt, and in the long groove portion, A stop for stopping the movement of the protrusion, and
The protrusion of the rotating square nut has a flat outer surface that is in sliding contact with the flat inner long surface of the guide body, and a position of the screw portion on the flat outer surface of the flat inner long surface of the guide body. It is a protrusion part for engaging with a long groove part so that sliding rotation is possible.

( 5 ) In the conductive connection unit of ( 4 ),
The rotating-type square nut is rotated by bringing the tip of the tightening bolt into contact when the protruding portion of the rotating-type square nut and the stop portion of the guide body are in an arrangement at the time of insertion. A sliding inclined surface for rotating the mold nut is provided.
( 6 ) In the conductive connection unit of ( 4 ) or ( 5 ),
In order to define the rotation or arrangement relationship of the rotating square nut, the locking for locking the side end side of the flat inner long surface of the guide body on the flat outer surface of the rotating square nut A part.
( 7 ) In the conductive connection unit of ( 6 ),
In order to lock the locking portion of the flat outer side surface of the rotating square nut to the guide body, a notch recess is provided on the side end side of the flat inner long surface of the guide body.

( 8 ) A method of conductively connecting a plurality of conductive members using any one of the conductive connection units (1) to ( 5 ),
A grounded member, which is a conductive member, is provided with a through-hole through which the guide member of the nut restraining member can be inserted when the rotating square nut is housed and disposed when inserted.
A conductive connection method for electrically connecting the grounded member by inserting the guide body into the through hole and tightening the tightening bolt was adopted.

The present invention has the following special effects.
1) According to the conductive connection unit and the conductive connection method of the present invention, a conductive structural member such as a curtain wall frame is mutually connected by a lightning protection conductive connection unit made of an electric conductor such as a flexible aluminum stranded wire. Therefore, even in a high-rise building, it is possible to prevent lashover due to side lightning, damage to equipment and facilities, fire, explosion, or electric shock from the human body, and the like. In addition, the conductive connection unit according to the present invention can be designed so that practical damage does not occur even if the impulse current of 50 kA is applied three times, the screw of the tightening portion is not easily loosened, and each component member during lightning strike There is no such thing as melting.

2) Since the conductive connection unit according to the present invention can be configured to be fixed and secured with a margin with an optimum length so that excessive tension does not act against shaking such as earthquake and strong wind, the curtain wall frame The electrical continuity between bodies can be maintained stably for a long period of time, and side lightning damage can be reliably prevented.

3) The conductive connection unit according to the present invention employs a configuration in which an operator can fasten and fix a bolt to the curtain wall frame from only one side, and can prevent co-rotation. For this reason, the worker who is on the side performing the mounting operation to the curtain wall frame can quickly and surely perform the mounting by a simple operation of simply tightening the tightening bolt.

4) In the conductive connection method according to the present invention, mounting holes (through holes) for attaching the conductive connection units to the curtain wall frame in advance are provided at a plurality of locations, and the conductive connection units are inserted into the mounting holes (through holes). Since one of the terminals is fixed and the curtain wall frame is fixed to the wall surface of the building, the curtain wall frame can be electrically connected to each other by the crimp terminal of the other conductive connection unit. The installation time of the connecting unit can be halved, and it is more economical because it is inexpensive and uniform.
5) Since the loosening prevention member is interposed between the cap body 50 and the flat plate portion 22 of the crimp terminal and tightened, the curtain wall frame or the like can be used even when the building is shaken by an earthquake or strong wind. The tightening bolt of the attached conductive unit can maintain stable and good conductivity over a long period of time without loosening.

Now, embodiments of the conductive connection unit and the conductive connection method according to the present invention will be described in more detail with reference to FIGS.
FIG. 1 is a configuration diagram of a conductive connection unit according to an embodiment of the present invention. FIG. 1 (1) is a top external view of the conductive connection unit 100, and FIG. It is a side external view including a figure.
2 (1) to 2 (3), FIG. 2 (1) is an external perspective view showing a rotating square nut 40 which is a constituent member of the conductive connection unit 100 of FIG. 1, and FIG. 2) is an external perspective view showing the nut restraining member 50, and FIG. 2 (3) is a bottom view of the nut restraining member 50.

  FIGS. 3A and 3B are views for explaining the structure of the nut restraining member 50. FIG. 3A is an exploded view in an external perspective view, and FIG. 3B is an exploded view in a front view. As shown in FIG. 3, the nut restraining member 50 is integrally configured by combining a cap body 51 and a guide body 53, and is arranged at the center of the thin disc-shaped flange portion 53 ′ of the guide body 53. Bolt holes 53h are provided in the cylindrical body 53A, and a cylindrical body 53A that can be inserted into a through hole (clamping hole) 53h is formed below the disk-shaped flange 53 '. A pair of guide portions 53a and 53b are extended downward. Further, the outer diameter G1 of the disk-shaped flange portion 53 'is set to have a shape and size that fits into the inner diameter C1 of the cap body 51. That is, here, the dimensional relationship between the outer diameter G1 of the flange 53 'and the inner diameter C1 of the cap body 51 is preferably designed so that G1 = C1 or G1 is slightly larger than C1. The length H of the cylindrical body portion 53A in the insertion direction will be described later with reference to FIG. 10 and is a length that does not protrude through the conductive member 60 in a state of being tightened by the tightening bolt 30.

  4 (1) and 4 (2) are bottom views showing a state when the rotating square nut 40 is incorporated in the nut restraining member 50, and FIG. FIG. 4 (2) shows the state of insertion stored in the nut restraining member 50. In FIG. 4 (2), the rotary square nut 40 is rotated 90 degrees from the state of insertion and directed laterally, and screwed with the tightening bolt. It is a figure which shows the arrangement | positioning state (state from a fastening start to the completion of fastening) at the time of the fastening which became the position.

FIG. 5 is an external perspective view showing a positional relationship when the rotary-type square nut 40 and the nut restraining member 50 are combined with each other. FIG. 5A shows the through hole 61 of the conductive member 60. FIG. 5B shows an arrangement state at the time of insertion, FIG. 5B shows an arrangement state at the start of tightening, and FIG. 5C shows an arrangement state at the completion of tightening.
6A and 6B are explanatory views based on an external perspective view when attaching the conductive connection unit 100 to the conductive member 60. FIG. 6A shows a state at the time of insertion, and FIG. FIG. 5C shows the situation at the start of tightening, and FIG.

FIG. 7 is a top view (FIG. 7 (1)) and a side view (FIG. 7 (2)) showing a conductive connection unit 110 as another embodiment according to the present invention. Here, the outer periphery of the cap body of the nut restraining member A protruding portion T is disposed on the side, and the rotating square nut 48 here has no edge on both sides of the inclined surface portion 48 ′.
FIG. 8 is a view showing an example of the protruding portion T on the outer peripheral side of the cap body of the nut restraining member, and FIG. 8 (1) is a partially cut-out side surface of the cap body having an inverted U-shaped cross section. FIG. 8 (2) shows a projecting portion (Tb) formed at one place on the outer surface of the cap body. As described above, the outer diameter G1 of the disc-shaped flange portion 53 ′ of the nut restraining member 50 is formed in a dimension that can be accommodated in the inner diameter C1 of the cap body. .

  FIG. 9 shows that when a building is shaken by an earthquake or strong wind, it is loosened in order to avoid a problem of electrical conductivity caused by loosening of a tightening bolt of a conductive unit attached to a curtain wall frame or the like. 4 is a schematic side view showing an embodiment in which a prevention member 63 is interposed between a cap body 51 and a flat plate portion 22 of a crimp terminal 20 so as to pass through and tighten a fastening bolt 30. FIG.

  FIG. 10 is a partially cut-away side view showing the same object as that of the embodiment of FIG. 9, but showing still another embodiment. Also in FIG. 10, the loosening prevention member 64 is interposed between the cap body 51 and the flat plate portion 22 of the crimp terminal 20 in the same manner as in FIG. 9, but the loosening prevention member 64 has an inverted U-shaped cross section. 9 is different from the one shown in FIG.

  The conductive connection unit 100 shown in FIG. 1 according to the present invention includes an electric conductor 10 (in this case, an electric wire made of aluminum strands), a crimp terminal 20, a tightening bolt 30, a rotary square nut 40, and a nut restraining member 50. A conductive member 60 interposed between the crimping terminal 20 and the rotary square nut 40 through a through hole 61 (mounting hole) drilled in the conductive member 60. In this configuration, the fastening bolt 30 that is screwed into the square nut 40 is clamped by being tightened, and an electrical connection can be obtained from the conductive member 60. The crimp terminal 20 connected to the electric conductor 10 has a crimp part 21 for fixing the end of the electric conductor 10 and an insertion hole 23 for inserting the fastening bolt 30. And a flat plate portion 22 for surface connection.

First, regarding the nut restraining member 50, as shown in FIG. 2 (2), a ring-shaped cap body 51 having a U-shaped cross section and a disk shape fitted inside the ring-shaped cap body 51. And a guide body 53 including two bifurcated and strip-shaped guide portions (53a and 53b) are integrally assembled. The cap body 53, and the bifurcated guide body 53 having a disc-shaped flange portion 53 ′ and guide portions (53a and 53b) have bolt holes (52 and 53h) through which the tightening bolts are inserted. The clamp bolt 30 is interposed between the head 31 of the fastening bolt and the flat plate portion 22 of the crimp terminal, and is clamped by fastening the fastening bolt 30.
Here, the cap body 51 is made of a metal material such as aluminum or copper, the guide body 53 having two guide portions (53a and 53b) is made of a material that can be easily molded by resin, and the cap body 51 and the guide body 53 are two members. Can be combined and combined to form a nut restraining member 50 integrally.

  Further, the two guide portions (53 a and 53 b) provided in the nut restraining member 50 have an external shape that allows the through-hole 61 of the conductive member 60 to pass through, and are inserted from the bolt holes 52 of the cap body 51. The fastening bolt 30 is formed so as to be extended and attached to both sides in the axial direction. Here, regarding the shape and size of the outer surfaces (56a and 56b) of the guide portions (53a and 53b), a circular cross section having a dimensional diameter capable of passing through the through hole 61 of the circular cross section formed in the conductive member 60. In FIG. 2 (3), a circular line that contacts the outer surfaces (56 a and 56 b) is indicated by reference numeral 57.

  The guide body 53 having these two guide portions (53a and 53b) is in surface contact with the flat outer surfaces (41a and 41b) on both sides of the rotating square nut 40 shown in FIG. 2 (1). , Flat inner long surfaces (54a and 54b) for enabling the moving operation and the rotating operation are provided. In addition, since the protrusions (43a and 43b (not shown)) provided at the center of the flat outer surfaces (41a and 41b) of the rotating square nut 40 are moved along the center axis of the tightening bolt, the Long and narrow long groove portions (55a (not shown) and 55b) along the bolt shaft are provided on the inner long surfaces (54a and 54b), and the rotary type square nut 40 is provided in the long groove portions (55a and 55b). Stop portions (Sa (not shown) and Sb) are provided at positions corresponding to the end portions of the long groove portions for stopping the movement of the projection portions (43a and 43b).

  Next, as shown in FIG. 2 (1), the turning-type square nut 40 of the conductive connection unit 100 is slid by four flat long side surfaces (41a and 41b, 45a and 45b) and the bolt tip. In addition, it has inclined surfaces (42a and 43b) for the purpose, and has a prismatic shape as an overall appearance. The long side surfaces (41a and 41b) here further extend from the inclined surfaces (42a and 43b) to form edges (46a and 46b), and the long side surfaces (41a and 41b) are rectangular planes. It has become.

  This rotating square nut 40 includes a screw portion 45 for screwing with a fastening bolt 30 penetrating the center of the long side surfaces (45a and 45b), and a flat inner long surface (54a and 54a) of the guide portions (53a and 53b). 54b) and flat outer surfaces (41a and 41b) that are in sliding contact with each other, and a concave section on the flat inner long surfaces (54a and 54b) of the guide portions (53a and 53b) on the flat outer surfaces (41a and 41b). Long groove portions (55a and 55b) and projections (43a and 43b (not shown)) for slidably engaging with each other.

Further, as shown in FIG. 2 (1), the flat outer surface 41a of the rotary square nut 40 is locked to the side end surface (57a or 57b) of the guide portion (53a or 53b). A portion 44a is provided. Such a locking portion can be provided as a locking portion 44b (not shown) on the flat outer surface 41b side as required, but usually only one side is required.
The position where the locking portion 44a is locked with the guide body 53 is clearly set, and in order to ensure that the rotating square nut 40 is housed in the guide portions (53a and 53b), the guide Cutout recesses (58a and 58b) are formed in the side edges (57a and 57b) of the parts (53a and 53b). With such a configuration, it is possible to reliably and easily position the locking portion (44a) into the notched recesses (58a and 58b), and the rotating square nut 40 is provided on the side end side portion ( 57a and 57b) can be stored so as not to protrude.

Further, with reference to FIG. 2, the dimensions and combination relationships between the rotating square nut 40 of the conductive connection unit 100 and the guide body 53 having the two guide portions (53a and 53b) of the nut restraining member 50 will be described.
2 (1) has a vertical side (an opposite side dimension x1) parallel to the direction in which the fastening bolt 30 enters the screw hole 45 on the flat outer surface (41a and 41b). Further, on the outer side surfaces (45a and 45b), there is a horizontal side (an opposite side dimension x2) perpendicular to the direction in which the fastening bolt 30 enters, and the rotary type square nut 40 is formed by the vertical side and the horizontal side. Four sides of a rectangular cross section are formed. In addition, it is preferable that the both insertion surfaces of the screw hole 45 are slightly chamfered so that the screw can be easily screwed together.

  The guide portions (53a and 53b) of the nut restraining member 50 in FIG. 2 (2) have the same shape (similar shape) for the two guide portions, and these two guide portions (53a) are used. And 53b) are arranged at positions rotated by 180 degrees with respect to the axis of the fastening bolt 30 to be inserted. The dimensions of these two guide parts (53a and 53b) include a distance dimension (y2) between the two guide parts and a lateral width dimension (y1) between the flat inner long surfaces (54a and 54b). And y2 are shown in FIGS. 2 (2) and 2 (3).

  Since the rotary type square nut 40 is incorporated in the two guide portions (53a and 53b) of the nut restraining member 50, the opposite side dimension (x2) of the rotary type square nut 40 is determined by the guide portions (53a and 53b). ) Is set to be equal to or not exceeding the interval dimension (y2). Further, the opposite side dimension (x1) of the rotating square nut 40 may be a dimension that can be accommodated in the guide parts (53a and 53b), but in the accommodated state, the outer side surface of the guide part (53a and 53b). The rotating square nut 40 must be dimensioned so as not to protrude from the circumscribed circle 57 (FIG. 2 (3)), which is a circle in contact with (56a and 56b). Therefore, in terms of design, the dimension within the range where the opposite side dimension (x1) of the rotating square nut 40 is made to coincide with the lateral width dimension (y1) of the guide part or slightly changed to the lateral width dimension (y1) of the guide part. It is good to adopt.

  4 (1) and 4 (2) are bottom views when the rotary square nut 40 and the nut restraining member 50 are combined, and thereby, the arrangement state (1) when the conductive connection unit 100 is inserted and The arrangement state (2) during tightening will be described. 4 (1) and 4 (2), the opposite side dimension (x2) of the rotating square nut 40 matches the interval dimension (y2) of the guide section, and the rotating square nut 40 The opposite side dimension (x1) of 40 is also matched with the lateral width dimension (y1) of the guide part, and these are used for the constituent members.

  4 (1) is in the stowed state, and the protrusions (43a and 43b) of the rotary square nut 40 are positioned at the positions of the stop portions (Sa and Sb) of the long groove portions (55a and 55b) of the nut restraining member 50. In addition, the flat side surfaces (41a and 41b) of the rotating square nut 40 are arranged so as to coincide with the positions where the guide portions (53a and 53b) of the nut restraining member 50 are located. This storage state is a form in which the rotary square nut 40 is stored in the guide portions (53a and 53b), and the rotary square nut 40 protrudes from the circumscribed circle 57 in FIG. Instead, the through hole 61 of the conductive member 60 of FIG. 1 can be inserted.

  4 (2) shows a bolt-tightened state, and the protrusions (43a and 43b) of the rotary square nut 40 include stop portions (53a and 53b) in the long groove portions (55a and 55b) of the nut restraining member 50. FIG. At any position, the longitudinal direction of the flat side surfaces (41a and 41b) of the rotary square nut 40 and the longitudinal direction of the guide portions (53a and 53b) of the nut restraining member 50 are approximately 90 degrees. The arrangement has an angle of. This stored state is an arrangement when the tightening bolt is screwed into the screw hole 45 penetrating the rotary square nut 40, and takes such a form from the start of tightening to the completion of tightening.

  FIGS. 5A to 5C are external perspective views showing the mutual positional relationship between the rotary square nut 40 and the nut restraining member 50. FIG. FIG. 5A shows a form when the conductive member is inserted into the through hole, and the rotary type square nut 40 is disposed in the guide portion (53a and 53b). FIG. 5B shows a form at the start of bolt tightening. When the inclined inclined surface 42a for sliding of the rotary square nut 40 is pushed against the tip of the fastening bolt, the rotary square nut 40 is This is the arrangement when rotated 90 degrees. FIG. 5 (c) shows a form in which the bolt tightening has further progressed and the rotary square nut 40 has been moved to the upper part of the figure, and this shows the arrangement when the tightening is completed.

  5 (a), the bottom view thereof is the same as FIG. 4 (1), and the protrusions (43a and 43b) of the rotating square nut 40 are the end of the long groove portions (55a and 55b). At the position of the stop portions (Sa and Sb) which are (lower ends), the locking portion 44a of the rotary type square nut 40 is located in the notch recess 58a provided in the side end portion 57a of the guide portion 53a. is doing. Here, it is set in advance so that when the locking portion 44a of the rotating square nut 40 is stored in the notch recess 58a of the guide portion 53a, it is stored.

5 (b), the bottom view is the same as FIG. 4 (2), and the projections (43a and 43b) of the rotating square nut 40 are stopped as in FIG. 5 (a). Although it is in the position of the parts (Sa and Sb), the rotary square nut 40 is in a state rotated about 90 degrees from the state of FIG. In the state of FIG. 5 (a), when the fastening bolt is inserted from above, the tip of the bolt hits the inclined surface 42a of the rotary square nut 40 and further presses it, thereby inclining surface 42a. By sliding above, the rotating square nut 40 is rotated about the protrusions (43a and 43b). At that time, the rotation angle of the rotation-type square nut 40 can be determined by the position when the locking portion 44a of the rotation-type square nut 40 collides with the side end side portion 57a of the guide portion 53a. The locking portion 44 of the rotary square nut 40 is provided at a position where the angle is 90 degrees.
In addition, regarding the inclined surface 42a, it is necessary to define the inclination angle, cross-sectional shape (flat, curved, circular, elliptical, etc.), size, etc., but the rotating square nut 40 rotates and moves. In order to facilitate, it is only necessary to appropriately design and determine the balance with other components.

  5 (c), the bottom view thereof is the same as that of FIG. 4 (2), but the protrusions (43a and 43b) of the rotary type square nut 40 are stopped portions (Sa and Sb). ) Are moved upward along the long groove portions (55a and 55b). In FIG. 5 (c), subsequent to FIG. 5 (b), the screw hole 45 of the rotary square nut 40 remains screwed with the fastening bolt, so that the rotary square nut 40 is in the horizontal position. It is in a state where it is lifted upward while being held by the.

  FIGS. 6A to 6C are explanatory views showing a plurality of steps related to the attachment work for connecting the conductive connection unit 100 to the conductive member 60. Here, the series of operations shown in FIGS. 6A to 6C can all be performed by the operation of the worker on the upper surface side of the conductive member 60, whereby the conductive connection unit 100 can be performed from one side. It is clear that a so-called “blind screw mechanism” is provided that can start and complete the mounting operation by only this operation.

FIG. 6A shows a state in which the conductive connection unit 100 is stored and inserted into the through hole of the conductive member 60. The rotating square nut 40 and the nut at this time are shown in FIG. The positional relationship with the restraining member 50 is as shown in FIG.
6 (b), following FIG. 6 (a), the tightening bolt 30 is inserted deeper and the rotating square nut 40 is rotated about 90 degrees, and the tightening bolt 30 and the rotating square nut 40 are separated. The situation where the screw holes are aligned with the bolt tightening direction is shown. The positional relationship between the rotating square nut 40 and the nut restraining member 50 at this time is as shown in FIG.

  6 (c), the tightening bolt 30 is tightened after FIG. 6 (b), and the upper surface of the rotating square nut 40 comes into contact with the back surface of the conductive member 60. The components 51, the crimp terminal 20, the conductive member 60, and the rotary square nut 40 are firmly and integrally coupled together, and the conductive connection with the conductive member 60 is completed. The positional relationship between the rotating square nut 40 and the nut restraining member 50 at this time is as shown in FIG.

  FIG. 7 is a view showing another embodiment of the conductive connection unit of the present invention, in which FIG. 7 (1) is a top view of the conductive connection unit 110, and FIG. 7 (2) is a side view thereof. Here, a protrusion 59 is formed on the outer peripheral side of the cap body 51 of the nut restraining member 50. Such a configuration of the protruding portion T of the cap body 51 is such that when the cap body 51 rotates with tightening of the bolt, the protruding portion T is the end of the crimping portion 21 of the crimp terminal 20 or an electric wire (electrical conductor). It is intended to prevent the cap body 51 from co-rotating by colliding with or being caught by the end of 11a. Further, as shown in FIG. 7 (2), the rotation type square nut 48 here is one having no edge on both sides of the inclined surface 48 ′, and this configuration is shown in FIG. 2 (1). This is different from the rotating square nut 40.

  FIG. 8 is a view for showing an example in which a protruding portion is provided on the annular outer peripheral side of the cap body of the nut restraining member. FIG. 8 (1) shows a cap body 51a having an inverted U-shaped cross section, in which a part of the outer periphery is cut out and pulled out to the outside to form a protruding portion Ta. Further, FIG. 8 (2) is manufactured by using a molding or casting technique so that a part of the outer peripheral wall of the cap body 51b becomes the protruding portion Tb. The cap body may be manufactured from a metal material such as aluminum / copper / iron.

9 shows that in the conductive connection unit 100 or 110, a loosening prevention member 63 having an inner diameter corresponding to the diameter of the through hole 61 formed in the conductive member 60 is interposed between the cap body 51 and the flat plate portion 22 of the crimp terminal 20. The conductive connection unit 120 is interposed and tightened with a tightening bolt 30.
When the tightening bolt is M5 mm, since the outer diameter of the cylindrical body 53A of the nut restraining member 50 is about 10.5 mm, a commercially available spring washer for M10 mm can be used as it is.
Further, as the loosening prevention member 63, for example, a spring washer. Belleville spring washer. Toothed washer. Commercially available JIS standard products such as wave spring washers can be used at low cost. With the above configuration, problems such as loosening of the tightening bolt can be eliminated by the repulsive force of the washer, so that a stable conductive connection can be maintained over a long period of time.

  FIG. 10 shows still another embodiment related to FIG. 9. The shape of the loosening prevention member 64 interposed between the cap body 51 and the flat plate portion 22 of the crimp terminal 20 is changed to the hole diameter of the through hole 61. The outer diameter is an outer diameter that can be stored in the cap body 51, and prevents the disc-shaped flange 53 ′ from loosening at the bottom of the cap body 51 when the tightening bolt 30 is tightened. The conductive connection unit 130 is configured to be pressed and fixed by the member 64 to prevent co-rotation and prevent loosening.

  With the above configuration, the flange portion 53 ′ of the nut restraining member 50 is pressed against the bottom portion of the cap body 51 by the loosening prevention member 64 when the fastening bolt 30 is tightened. Thus, it is possible to improve the working efficiency and at the same time prevent the tightening bolt 30 from loosening. In the case of the embodiment of FIG. 10, the depth and the inner diameter of the cap body 51 may be appropriately changed so as to match the dimensions of a commercially available spring washer. Further, the length H of the cylindrical body 53A is set to be equal to or less than the thickness of the conductive member 60 so that it does not abut against the insertion surface of the rotary square nut 40 screw hole 45 when tightened and fixed.

The conductive connection unit according to the present invention is a conductive connection unit in which a metal frame of curtain walls attached to a building wall surface or a conductive structure such as a steel frame of a building in the immediate vicinity of the metal frame is a conductive connection unit. It is good to use it by connecting, electrically comprising a closed circuit and being short-circuited. Further, these conductive connection units for curtain walls are preferably grounded to the ground electrode of the structure at an appropriate location. The ground electrodes here are connected to, for example, interconnected reinforcing bars or other underground structures in concrete, which are connected to the ground and grounded.
In addition, the conductive connection unit according to the present invention is generally used in order to prevent excessive tension from acting on vibrations such as earthquakes and strong winds, or to make it economical in length. The length (distance) between the crimp terminals connecting the electric conductors is preferably 15 to 50 cm.

  The conductive connection unit according to the present invention can be applied to a curtain wall frame for a high-rise building or the like as a curtain wall unit. In this case, it goes without saying that lightning protection measures such as side lightning entering from a curtain wall can be made more reliable. Further, after the curtain wall frame is installed on the outer wall surface of the building, the conductive connection unit for curtain wall according to the present invention may be retrofitted.

In addition, the following method is convenient because the application range of the present invention can be further widened and implemented in an economical manner.
In other words, side lightning countermeasure information is taken in at the time of building design, and mounting holes (through holes) of the conductive connection unit are previously opened in the curtain wall frame at a plurality of locations, and the mounting holes (through holes) are electrically conductive. For curtain walls such that one of the crimp terminals of the connection unit is fixed, the curtain wall frame is fixed to the wall of the building, and then the curtain wall frames are electrically connected to each other by the crimp terminal of the other conductive connection unit. The conductive connection unit can be mounted as a method, thereby reducing the installation time of the conductive connection unit for the curtain wall by half and making it cheaper and more economical.

  In the above method, since the crimp terminal of the conductive connection unit can be easily fixed to the curtain wall frame before fixing the curtain wall frame to the wall surface of the building, both terminals of the conductive connection unit have the conductive connection of the structure of the present invention. It is not necessary to use a unit, and at least one of them may be fixed using, for example, a conventional nut having a locking function. If comprised in this way, the conductive connection unit 100 can be simplified and it can also be made cheaper.

In the present invention, the conductive curtain wall used for the outer wall surface of the building may be applied as the grounded object. However, the conductive connection unit of the present invention is fastened to a conductive member such as a curtain wall frame. The method to do is as follows.
Drilled into the curtain wall frame using the above-mentioned conductive connection unit that is integrated with a crimping bolt / rotating square nut / nut restraining member integrated into a crimp terminal fixed to both ends of an aluminum stranded wire (electrical conductor) Insert the guide body of this nut restraining member into the tightened hole (through hole), tighten the tightening bolt, rotate the rotary square nut approximately 90 degrees, tighten the tightening bolt, and rotate with the tightening bolt. Screw the movable square nut.
In this way, the conductive connection unit has a configuration in which the electrically separated curtain wall frames are electrically connected to each other, so that the entire wall surface of the building covered with the curtain wall frame is equipotentially bonded. Lightning damage such as thunder can be avoided.

  And as an electrical conductor connected to a crimp terminal, it is good to use the strand wire which consists of materials, such as aluminum, copper, and iron, and a flexible electrical conductor, More preferably, as these electrical conductors, an aluminum strand wire is used. And the length of the aluminum stranded wire is preferably set to 15 cm or more and 50 cm or less.

  Further, in the conductive connection unit according to the present invention, the protrusion provided on the cap portion of the crimp terminal is engaged with the end portion of the electric conductor or the crimp portion of the crimp terminal when the cap body rotates. A structure for preventing the nut restraining member from co-rotating when tightening the tightening bolt is used. Such a protrusion may be appropriately formed by a well-known means. A part may be formed by cutting out one part of the part and pulling it out, or a part projecting in advance from the outer part of the cap part may be formed and used as the projecting part.

  Furthermore, in the method of conductively connecting a plurality of conductive members using the conductive connection unit according to the present invention, a mounting hole slightly larger than the two guide portions having a substantially cylindrical shape on the curtain wall which is a conductive member ( Through holes), insert the two guide parts of the conductive connection unit into this mounting hole, and then tighten the bolts by screwing the tightening bolts into the nuts. It can be set as the attachment method of the electroconductive connection unit made to carry out connection connection.

  Further, in the method for conductively connecting a plurality of conductive members using the conductive connection unit according to the present invention, a plurality of mounting holes (through holes) of the conductive connection unit are previously provided in the curtain wall frame which is the conductive member. And one of the terminals of the conductive connection unit is fixed to the mounting hole, the curtain wall frame is fixed to the wall surface of the building, and then the curtain wall frame is mutually connected with the crimp terminal of the other conductive connection unit. It can be set as the attachment method of the conductive connection unit which carries out electrical connection connection of electrically conductive structures, such as a curtain wall and the steel frame of a building.

  The conductive connection unit according to the present invention, as described above, is a lightning protection technique for electrically connecting conductive members such as a building structure and an outer wall member to form a conductive connection passage for flowing a lightning surge current or the like to the outside. It can be applied in the industrial field. In addition, the conductive connection unit is preferably used in a technical field in which electrical continuity is obtained from a conductive curtain wall that is an outer wall surface of a building. With the excellent feature that the installation work can be done very efficiently, the applicability to buildings with curtain walls and the installation workability can be dramatically improved. Can be demonstrated.

1A and 1B are configuration diagrams of a conductive connection unit according to an embodiment of the present invention, in which FIG. 1A is a top external view of the conductive connection unit 100, and FIG. 1B is a side view including a partial cross-sectional view of the conductive connection unit 100; It is an external view. 2 (1) is an external perspective view showing a rotating square nut 40 which is a constituent member of the conductive connection unit 100 of FIG. 1, and FIG. 2 (2) is an external perspective view showing the nut restraining member 50 similarly. 2 (3) is a bottom view of the nut restraining member 50. FIG. FIG. 3 is a structural diagram for illustrating that a nut restraining member 50 that is a constituent member of the conductive connection unit 100 of FIG. 1 has a structure in which a cap body 51 and a guide body 53 are combined. FIG. 4A is a bottom view showing a state when the rotary type square nut 40 is incorporated in the nut restraining member 50. FIG. 4A is a state at the time of insertion in which the rotary type square nut 40 is housed in the nut restraining member 50; FIG. 4 (2) is a diagram showing a state from the start to the end of the tightening when the rotating square nut 40 is rotated 90 degrees from the inserted state and turned to the lateral direction and is screwed with the tightening bolt. is there. FIG. 5A is an external perspective view showing a positional relationship when the rotary square nut 40 and the nut restraining member 50 are combined with each other, and FIG. ) Shows the arrangement state at the start of tightening, and FIG. 5C shows the arrangement state at the completion of tightening. FIGS. 6A and 6B are explanatory views in perspective of an external appearance when the conductive connection unit 100 is attached to connect the conductive member 60. FIG. 6A shows a state at the time of insertion, and FIG. FIG. 5C shows the situation when the tightening is completed. It is the top view (Drawing 7 (1)) and side view (Drawing 7 (2)) which show conductive connection unit 110 as other embodiments by the present invention. It is a figure which shows the example of the protrusion part T in the outer peripheral side of the cap body of a nut restraining member. 4 is a schematic side view showing a conductive connection unit 120 according to another embodiment of the present invention. 6 is a partially cutaway side view schematically showing a conductive connection unit 130 according to still another embodiment of the present invention.

Explanation of symbols

100, 110, 120, 130 Conductive connection unit 10 Electrical conductor 20 Crimp terminal 21 Crimp part of crimp terminal 22 Flat part of crimp terminal 23 Insertion hole 30 Tightening bolt 31 Head part of tightening bolt 40 Rotating type square nut 41a, 41b Both sides Flat outer side surfaces 42a, 42b Inclined surfaces 43a, 43b Protrusions 44a Locking portions 45 Screw holes 45a, 45b Flat long side surfaces 46a, 46b Edge portions 48 Rotating type square nuts 48 'Inclined surfaces 50 Nuts Restraint member 51 Cap body C1 Inner diameter of cap body 52 Bolt hole 53 Guide body 53 ′ Gutter part of guide body G1 Outer diameter of collar part 53A Cylindrical body part of guide body 53h Center hole part of guide body 53a, 53b Guide part 54a, 54b Flat inner long surface 55a, 55b Long groove part Sa, Sb Long groove part stop part (terminal part)
56a, 56b Outer side surfaces 57a, 57b Side edges 58a, 58b Notch recess 57 Circle where outer side surfaces (56a and 56b) contact 60 Conductive member 61 Through hole (mounting hole) of conductive member
62 Cylindrical torso 63, 64 Loosening prevention member x1 Vertical side dimension of rotating square nut 40 x2 Horizontal side dimension of rotating square nut 40 y1 Dimension between side end sides of guide part (horizontal width dimension)
y2 Guide section spacing 110 Conductive connection unit T, Ta, Tb Cap body protrusion H Length of cylindrical body

Claims (8)

Electrical conductor (10) / crimp terminal (20) / clamping bolt (30) / rotating square nut (40) / nut restraining member (50) And sandwiching the conductive member (60) disposed between and through the through-hole (61) provided in the conductive member by tightening the tightening bolt that is screwed with the rotating square nut, A conductive connection unit for obtaining an electrical connection from the conductive member,
The crimp terminal (20) includes a crimp part (21) for fixing the end of the electric conductor, and a flat plate part (22) having an insertion hole for inserting the guide body of the nut restraining member. Prepared,
The nut restraining member (50) includes a cap body (51) having a U-shaped cross section and an annular outer peripheral side, and a disc-shaped flange portion (53 ') fitted inside the cap body. And a guide body (53) having two bifurcated and strip-shaped guide portions (53a, 53b) extended on the lower surface ,
The cap body (51) and the guide body (53) have bolt holes (52, 53h) through which the tightening bolt is inserted , and are interposed between the head of the tightening bolt and the flat plate portion of the crimp terminal. Arranged and configured,
The guide body (53), and forming a shape capable of passing through the through holes (23,61) between said conductive member and said plate, so as to extend on both sides of the clamping bolt is inserted from the cap body has the two bodies of the guide portion to be additionally provided with (53a, 53b) Te, moving the guide portions projecting portion of the pivot-type angle nut on the inner surface side of (43a, 43 b) along said clamping bolt Long groove portions (55a, 55b) for
The rotating square nut (40) is in the center and is engaged with a screw part (45) for screwing with the tightening bolt and a long groove part of the guide body so as to be slidably rotatable. Protrusions (43a, 43b) provided on both side surfaces,
The mutual positional relationship between the guide body (53 ) of the nut restraining member (50) and the rotating square nut (40) is such that the through hole (61) of the conductive member (60) can be inserted. The rotation type square nut (40) is accommodated in the two guide portions (53a, 53b) during insertion, and after the insertion, the rotation type square nut (40) is rotated and the tightening bolt (30 ) And a tightening arrangement that can be screwed together,
A protrusion (T) is formed on the outer peripheral side of the cap body (51) of the nut restraining member (50) , and the protrusion (T) is an end of the electric conductor (10) when the cap body (51) is rotated. Or a structure in which the nut restraining member is prevented from co-rotating when the tightening bolt is tightened by being arranged so as to be locked or collide with the crimp portion (21 ) of the crimp terminal (20). A conductive connection unit comprising: The conductive connection unit according to claim 1,
A conductive connection unit characterized in that a loosening prevention member having an inner diameter corresponding to a through hole drilled in the conductive member is interposed between the cap body and a flat plate portion of the crimp terminal, and is tightened with the tightening bolt. . In the conductive connection unit according to claim 2,
The shape of the loosening prevention member interposed between the cap body and the flat plate portion of the crimp terminal is an inner diameter equivalent to the hole diameter of the through hole, and the outer diameter is an outer diameter that can be stored in the cap body. The conductive connection unit is characterized in that, when the tightening bolt is tightened, a circular plate-shaped flange is pressed and fixed to the bottom of the cap body by the loosening prevention member to prevent co-rotation. In the conductive connection unit according to any one of claims 1 to 3 ,
The guide body includes a flat inner long surface on the inner surface side of the guide portion for contacting the flat outer surface on both sides of the rotating square nut to enable the moving operation and the rotating operation.
The long groove portion of the guide body is a long groove portion on a flat inner long surface for the protrusion of the rotating type square nut to move along the tightening bolt, and in the long groove portion, A stop for stopping the movement of the protrusion,
The protrusion of the rotating square nut has a flat outer surface that is in sliding contact with the flat inner long surface of the guide body, and a position of the screw portion on the flat outer surface of the flat inner long surface of the guide body. A conductive connection unit, characterized in that the conductive connection unit is a protrusion for slidingly and freely engaging with the long groove. The conductive connection unit according to claim 4 ,
The rotating-type square nut is rotated by bringing the tip of the tightening bolt into contact when the protruding portion of the rotating-type square nut and the stop portion of the guide body are in an arrangement at the time of insertion. A conductive connection unit comprising a sliding inclined surface for rotating the mold nut. In the conductive connection unit according to claim 4 or 5 ,
In order to define the rotation or arrangement relationship of the rotating square nut, the locking for locking the side end side of the flat inner long surface of the guide body on the flat outer surface of the rotating square nut A conductive connection unit comprising a portion. In the conductive connection unit according to claim 6 ,
In order to lock the locking portion of the flat outer side surface of the rotating square nut to the guide body, a notch recess is provided on a side end side portion of the flat inner long surface of the guide body. Conductive connection unit. Using a conductive connection unit according to any claim 1 to 7, there is provided a method of conductively connecting a plurality of conductive members,
A grounded member, which is a conductive member, is provided with a through-hole through which the guide member of the nut restraining member can be inserted when the rotating square nut is housed and disposed when inserted.
A conductive connection method characterized in that the grounded member is electrically connected by inserting the guide body into the through hole and tightening the tightening bolt.

Images