JP2015130757A - T-shaped clamp for electric wire connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a T-shaped clamp for electric wire connection which connects branch lines having different bore diameters with an overhead line so that the branch lines are arranged perpendicular to the overhead line.SOLUTION: A T-shaped clamp 10 includes a pair of plate-like conductive members 11, 12. The conductive members 11, 12 are formed so as to be rotatably connected with each other at one end part side and opened and closed at the other end part side. The conductive members 11, 12 have half arc shaped recessed parts 11a, 12a which sandwich an overhead line W from an outer periphery direction at the one end part side. Compression terminals 2, 3 include: plate-like battledore parts 2a, 3a in which multiple bolt holes 2h, 3h are opened; and cylindrical compression parts 2c, 3c to which terminals of branch lines We are inserted to be compressively connected. The conductive member 11 includes bolt holes 12h, 13h for fastening the battledore parts 2a, 3a thereinto so that the overhead line W is disposed so as to be arranged substantially perpendicular to axial directions of the compression parts 2c, 3c.

Description

  The present invention relates to a T-clamp for connecting wires. In particular, the present invention relates to a structure of a T-clamp for connecting electric wires that can hold overhead electric wires having different outer diameters and that can be connected so that a plurality of branch wires having compression terminals at the terminals are orthogonal to the overhead electric wires.

  In electrical work that handles high-voltage / extra-high-voltage overhead electric wires, the overhead electric wires and branch wires may be electrically connected by gripping the ends of the overhead wires and the branch wires substantially in parallel. A tool used for parallel connection of such electric wires is called a PG (Parallel Grooved) clamp.

  A conventional PG clamp is composed of a pair of conductive crank plates. These crank plates have a pair of arc grooves corresponding to the outer diameters of a pair of electric wires formed on opposing surfaces. These circular arc grooves are formed substantially in parallel with a predetermined separation distance. By accommodating a set of electric wires in these arc grooves and fastening a pair of crank plates with bolts and nuts, the set of electric wires can be gripped with a predetermined pressure.

  By the way, the conventional PG clamp prepares a pair of crank plates having arc grooves corresponding to these diameters when the diameter of one set of electric wires changes or when the diameter of one electric wire and the other electric wire are different. There was a bug. In order to solve such a problem, a PG clamp capable of gripping a set of electric wires having different diameters has been disclosed (for example, see Patent Document 1).

  On the other hand, in the electrical work described above, there is a work in which a plurality of branch lines having compression terminals at their terminals are connected so as to be orthogonal to the overhead electric wire. In this case, it is difficult to orthogonally arrange the overhead electric wire and the plurality of branch lines using the PG clamp. For such connection work, there has been disclosed a wire branching device that can achieve a desired wire clamping force using a relatively small compression coil spring and can be reduced in size (for example, see Patent Document 2). .

JP 2012-5181 A JP 2009-171698 A

  FIG. 6 is a perspective view showing the configuration of a conventional wire branching device. FIG. 6 of the present application corresponds to FIG. Referring to FIG. 6, a conventional wire branching device (hereinafter referred to as a T-shaped clamp) 9 is a pair of plate-like members that are configured such that one end portion is rotatably connected and the other end portion is openable and closable. Conductive members 91 and 92 are provided. The T-type clamp 9 includes a compression sleeve 93 and a pair of compression coil springs 94 and 94.

  Referring to FIG. 6, the pair of conductive members 91 and 92 are rotatably connected at one end side thereof by a connecting pin 9p. One of the conductive members 91 has a semicircular arc-shaped groove 91a formed on the inner wall that can abut one side of the outer periphery of the overhead electric wire W. Similarly, the other conductive member 92 has a semicircular arc-shaped groove 92 a that can be in contact with one side of the outer periphery of the overhead electric wire W formed on the inner wall. By placing the overhead wire W between the pair of grooves 91a and 92a and closing the other end side of the pair of conductive members 91 and 92, the overhead wire W can be sandwiched.

  Referring to FIG. 6, one conductive member 91 projects a compression sleeve 93 obliquely downward from the outer wall thereof. The compression sleeve 93 is formed with an insertion hole 93h through which a branch line We such as a leader line can be inserted from the distal end surface. The end of the branch line We can be fixed by inserting the end of the branch line We into the insertion hole 93h and compression-molding the distal end side of the compression sleeve 93. The branch line We and the overhead electric wire W can be electrically connected, and the branch line We can be arranged orthogonal to the overhead electric wire W.

  Referring to FIG. 6, a bolt member 94 b is inserted through the compression coil spring 94. The bolt member 94b has a washer 94w disposed on the head side thereof. One end surface of the compression coil spring 94 is in contact with the washer 94 w and the other end surface is in contact with the outer wall of one conductive member 91.

  Referring to FIG. 6, the bolt member 94 b has a shaft portion passing through one conductive member 91 and the other conductive member 92, and protruding from the outer wall of the other conductive member 92. A locking piece (not shown) protruding in the outer peripheral direction is provided at the tip of the shaft portion of the bolt member 94b. The engaging piece abuts against the outer wall of the other conductive member 92 and the compression coil spring 94 biases the force in the direction in which the washer 94w moves away from the outer wall of the one conductive member 91. The other end side of 92 can be closed, and the overhead electric wire W can be clamped with a predetermined pressure.

  Referring to FIG. 6, the compression coil spring 94 is surrounded by a gate-shaped bracket 95. An adjustment bolt 95 b is screwed onto the top of the bracket 95. If the adjustment bolt 95b is rotated in one direction, the tip of the adjustment bolt 95b pushes the head of the bolt member 94b, and the clamping force of the overhead electric wire W can be weakened. When the adjustment bolt 95b is rotated in the other direction, the tip of the adjustment bolt 95b moves backward from the head of the bolt member 94b, and the clamping force of the overhead electric wire W can be restored.

  However, it is required to remove the compression terminal connected to these electrical devices and connect this compression terminal to the overhead wire in the relocation work of the mounted electrical equipment or the restoration work caused by the failure of the electrical equipment. It has been. Although the T-shaped clamp 9 according to Patent Document 2 can compress the end of the branch line and connect it to the overhead wire, there is a problem that it is difficult to connect the compression terminal having a different diameter to the overhead wire. Further, the T-type clamp 9 according to Patent Document 2 has a problem that it is necessary to prepare another T-type clamp 9 when the diameter of the overhead electric wire is different. The above can be said to be the subject of the present invention.

  This invention is made | formed in view of such a subject, and while being able to connect the compression terminal from which an aperture differs to an overhead wire, it can connect so that the branch line which has a compression terminal in a terminal may be orthogonal to an overhead wire An object of the present invention is to provide a T-shaped clamp for connecting electric wires.

  The present inventors provide a T-type clamp for electric wire connection in which a branch line having a compression terminal at a terminal can be connected so as to be orthogonal to an overhead electric wire, and one end portion side is rotatably connected and the other end portion is connected. Hold the overhead wire with a pair of plate-shaped conductive members that can be freely opened and closed, and have a bolt hole that can be used to fasten the blade terminal of the compression terminal so that the branch line can be placed perpendicular to the overhead wire. It has been found that these problems can be solved by providing the conductive member, and based on this, the inventors have invented the following new T-clamp for connecting wires.

  (1) The T-clamp for connecting an electric wire according to the present invention is a T-type clamp for connecting an electric wire that can be connected so that a branch line having a compression terminal at the terminal is orthogonal to the overhead electric wire, and the one end is rotated. It is provided with a pair of plate-like conductive members that are freely connected and configured so that the other end side can be opened and closed. These conductive members have a semicircular arc-shaped recess that clamps the overhead electric wire from the outer peripheral direction on one end side. And the compression terminal is formed of a plate-shaped wing plate portion having one or more bolt holes, and a cylindrical compression member formed integrally with the wing plate portion and compressed and connected by inserting the end of the branch line. And the one conductive member has a bolt hole that can fasten the battledore portion so that the axial direction of the compression portion and the overhead electric wire can be arranged substantially orthogonal to each other.

  (2) It is preferable that one said electrically-conductive member has an area which can fix the 2 or more types of said battledore part from which an external shape differs.

  (3) It is preferable to further include a split collar that forms a plurality of pairs with different inner diameters, corresponding to the overhead electric wires having different diameters, which are housed in the recesses.

  The T-type clamp for connecting an electric wire according to the present invention includes a pair of plate-like conductive members that sandwich an overhead electric wire from its outer peripheral direction, and the axial direction of the compression portion that compressively connects the ends of the branch line and the overhead electric wire are arranged substantially orthogonally. Since the bolt hole which can fasten the feather | wing board part of a compression terminal is provided in one electrically-conductive member so that it can do, a branch line can be orthogonally arranged with respect to an overhead electric wire.

It is a perspective exploded view showing composition of a T type clamp for electric wire connection by one embodiment of the present invention. It is a perspective view which shows the structure of the T-shaped clamp for electric wire connection by the said embodiment. It is a figure which shows the structure of the T-shaped clamp for electric wire connection by the said embodiment, FIG. 3 (A) is a front view of the T-shaped clamp for electric wire connection, and FIG. 3 (B) is the right side of the T-shaped clamp for electric wire connection. It is a top view and is the state figure which opened the other electroconductive member with respect to one electroconductive member. It is a figure which shows the structure of the T-shaped clamp for electric wire connection by the said embodiment, FIG. 4 (A) is a front view of the T-shaped clamp for electric wire connection, and two types of feather board parts from which an external shape differs are one electrically-conductive member. FIG. 4 (B) is a right side view of FIG. 4 (A). It is a front view of the division | segmentation collar which comprises the pair with which the T-shaped clamp for electric wire connection by the said embodiment is equipped, FIG.5 (A) is a front view of the division | segmentation collar corresponding to an overhead electric wire with the smallest diameter, FIG.5 (B). Fig. 5A is a front view of a split collar corresponding to an overhead electric wire having a larger diameter than that of Fig. 5A, and Fig. 5C is a front view of a split collar corresponding to an overhead electric wire having a larger diameter than that of Fig. 5B. It is. It is a perspective view which shows the structure of the branch device of the electric wire by a prior art.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of T-clamp for wire connection]
First, the configuration of a T-clamp for connecting wires according to an embodiment of the present invention will be described.

  FIG. 1 is an exploded perspective view showing a configuration of a T-clamp for connecting wires according to an embodiment of the present invention. FIG. 2 is a perspective view showing the configuration of the T-clamp for connecting wires according to the embodiment.

  3A and 3B are diagrams showing the configuration of the T-type clamp for electric wire connection according to the embodiment. FIG. 3A is a front view of the T-type clamp for electric wire connection, and FIG. It is a right view of a form clamp, and is the state figure which opened the other electroconductive member with respect to one electroconductive member.

  FIG. 4 is a diagram showing the configuration of the T-clamp for connecting wires according to the embodiment, and FIG. 4 (A) is a front view of the T-type clamp for connecting wires, and shows two types of battledore portions having different external shapes. A state diagram fixed to one conductive member, FIG. 4B, is a right side view of FIG. In addition, since the same code | symbol as the code | symbol used by the prior art makes the effect | action same, it may omit in the following description.

(overall structure)
Referring to FIGS. 1 to 4, an electric wire connecting T-type clamp (hereinafter abbreviated as “T-type clamp”) 10 according to an embodiment of the present invention includes a pair of plate-like conductive members 11 and 12. These conductive members 11 and 12 are rotatably connected at one end side. Further, these conductive members 11 and 12 are configured to be openable and closable at the other end side. The conductive members 11 and 12 are preferably made of an aluminum alloy or a copper alloy. The T-shaped clamp 10 can fix a pair of different types of compression terminals 2 and 3 to one conductive member 11.

  Referring to FIGS. 1 to 4, the pair of conductive members 91 and 92 are rotatably connected at one end thereof by a connecting pin 1p. One conductive member 11 has a semicircular arc-shaped concave portion 11 a that can be in contact with one side of the outer periphery of the overhead electric wire W on one end side. Similarly, the other conductive member 12 has a semicircular arc-shaped recess 12a that can be brought into contact with one side of the outer periphery of the overhead electric wire W on one end side. The overhead electric wire W can be clamped by disposing the overhead wire W between the pair of recesses 11a and 12a and closing the other end side of the pair of conductive members 11 and 12.

  Referring to FIGS. 1 to 4, one conductive member 11 forms a rectangular plate-like compression terminal connection portion 11 b continuously with the recess 11 a. The other conductive member 12 is continuous with the recess 12a and forms a strip-like flange portion 12f. A plurality of bolt holes 11h are opened in the compression terminal connecting portion 11b and the flange portion 12f (see FIG. 3). By inserting the bolts 12b into these bolt holes 11h and fastening a set of nuts 12n to the bolts 12b, the other end portions of the pair of conductive members 11 and 12 can be reliably closed (see FIG. 4). .

(Compression terminal configuration)
Referring to FIG. 1 or FIG. 2 and FIG. 4, the compression terminal 2 is formed of a copper alloy having conductivity. The compression terminal 2 can also be formed of an aluminum alloy having conductivity. The compression terminal 2 is composed of a plate-shaped battledore plate portion 2a and a cylindrical compression portion 2c. The terminal of the branch line We is inserted from the tip of the compression part 2c, and the compression part 2c is compression-molded using a compression tool (not shown), thereby electrically and mechanically connecting the terminal of the branch line We and the compression terminal 2 to each other. Can connect.

  Referring to FIG. 1, the battledore portion 2a has four bolt holes 2h. For example, in these bolt holes 2h, the pitch A1 between the centers is 40 mm, and the distance B1 between the centers is 40 mm. Moreover, the hole diameter of these bolt holes 2h is 14 mm, and the battledore part 2a can be fixed to the compression terminal connection part 11b by using M12 bolts 2b. Moreover, the outer shape of the battledore part 2a is 115 mm (length) × 75 mm (width). Although the compression terminal 2 has the same outer shape of the battledore part 2a and the interval between the bolt holes 2h, the outer diameter of the applied branch line We has six types of 13.0 mm to 28, 2 mm.

  Similarly, referring to FIG. 1 or FIG. 2 and FIG. 4, the compression terminal 3 is formed of a copper alloy having conductivity. The compression terminal 3 can also be shape | molded with the aluminum alloy which has electroconductivity. The compression terminal 3 includes a plate-shaped battledore plate portion 3a and a cylindrical compression portion 3c. The terminal of the branch line We is inserted from the tip of the compression part 3c, and the compression part 3c is compression-molded using a compression tool (not shown), thereby electrically and mechanically connecting the terminal of the branch line We and the compression terminal 3 to each other. Can connect.

  Similarly, referring to FIG. 1, the battledore 6a has six bolt holes 3h. For example, in these bolt holes 3h, the pitch A2 between the centers is 50 mm, and the distance B2 between the centers is 50 mm. Further, the diameter of these bolt holes 3h is 18 mm, and the blade plate portion 3a can be fixed to the compression terminal connecting portion 11b by using M16 bolts 3b. Further, the outer shape of the battledore part 3a is 190 mm (length) × 100 mm (width). Although the compression terminal 3 has the same outer shape of the battledore part 3a and the interval between the bolt holes 3h, the outer diameter of the branch line We to be applied is four types of 35.2 mm to 41, 6 mm.

  Referring to FIG. 1 or FIG. 3, one conductive member 11 has a bolt hole 12h that can fix the battledore portion 2a to the left of the compression terminal connecting portion 11b. The bolt hole 12h is an M12 screw hole into which the bolt 2b is screwed. Also, one conductive member 11 has a bolt hole 13h that can fix the battledore portion 3a to the right side of the compression terminal connecting portion 11b. The bolt hole 13h is an M16 screw hole into which the bolt 3b is screwed.

  Referring to FIG. 2 or FIG. 4, the T-shaped clamp 10 can fix only the compression terminal 2 to the compression terminal connection portion 11b and can fix only the compression terminal 3 to the compression terminal connection portion 11b. The T-shaped clamp 10 can fix both the compression terminal 2 and the compression terminal 3 to the compression terminal connection portion 11b. That is, one conductive member 11 has an area that can fix two types of battledore portions 2a and 3a having different external shapes.

  In addition, referring to FIG. 2 or FIG. 4, the battledore plate portion 2a can be fastened to the compression terminal connecting portion 11b so that the axial direction of the compression portion 2c and the overhead wire W can be arranged substantially orthogonally, and the axial direction of the compression portion 3c The battledore portion 3a can be fastened to the compression terminal connection portion 11b so that the overhead electric wires W can be arranged substantially orthogonally. That is, the plurality of branch lines We and the overhead electric wires W can be arranged substantially orthogonally.

  Next, the configuration of the T-shaped clamp 10 according to the embodiment will be described. FIG. 5 is a front view of a pair of split collars provided in the T-clamp for connecting electric wires according to the embodiment, and FIG. 5A is a front view of the split collar corresponding to an overhead electric wire having the smallest diameter. 5 (B) is a front view of a split collar corresponding to an overhead electric wire having a larger diameter than that of FIG. 5 (A), and FIG. 5 (C) is a split corresponding to an overhead electric wire having a larger diameter than that of FIG. 5 (B). It is a color front view.

  Referring to FIGS. 1 to 5, the T-shaped clamp 10 further includes divided collars 4 a, 4 b, and 4 c that form a plurality of pairs. The split collars 4a, 4b, and 4c forming these pairs are housed in the pair of recesses 11a and 12a, and have different inner diameters corresponding to the overhead electric wires W having different diameters.

  Referring to FIG. 5A, the pair of split collars 4a and 4a that correspond to each other correspond to the overhead electric wire W having the smallest diameter. Referring to FIG. 5 (B), the pair of split collars 4b and 4b that correspond to each other correspond to the overhead electric wire W having a larger diameter than that of FIG. 5 (A). Referring to FIG. 5C, the pair of split collars 4c and 4c that form a pair correspond to the overhead electric wire W having a larger diameter than that of FIG.

  1 to 4, the T-shaped clamp 10 has a pair of split collars 4c and 4c attached as an embodiment, but a pair of split collars 4a and 4a or a pair of split collars 4b. -4b can also be attached (Fig. 5). When a pair of split collars that form a pair is not used, the overhead electric wire W having the maximum diameter can be sandwiched between the pair of recesses 11a and 12a. Thus, the T-shaped clamp 10 can easily hold an overhead electric wire having a different diameter by exchanging a plurality of types of divided collars having different inner diameters.

[Operation of T-clamp for wire connection]
Next, the operation and effect of the T-shaped clamp 10 according to the embodiment will be described. 1 to 4, a T-shaped clamp 10 according to the embodiment includes a pair of plate-like conductive members 11 and 12 that sandwich an overhead electric wire W from the outer peripheral direction, and compresses and connects the ends of the branch line We. One conductive member 11 is provided with bolt holes 12h and 13h capable of fastening the feather plate portions 2a and 3a of the compression terminals 2 and 3 so that the axial direction of the compression portions 2c and 3c and the overhead wire W can be arranged substantially orthogonally. Therefore, the branch line We can be orthogonally arranged with respect to the overhead electric wire W. In the T-shaped clamp 10 according to the embodiment, it is easy to remove the compression terminal connected to the electric device and connect the compression terminal to the overhead electric wire W.

  1 to 5, the T-shaped clamp 10 according to the embodiment is provided in a pair of recesses 11a and 12a to form a plurality of pairs having different inner diameters corresponding to the overhead wires W having different diameters. Since the split collars 4a, 4b, and 4c are further provided, the overhead electric wires W having different diameters can be easily held by exchanging a plurality of types of split collars having different inner diameters.

The T-type clamp for connecting wires according to the present invention is expected to have the following effects.
(A) It can handle overhead electric wires with different diameters and branch lines with different diameters, and can be used in various places.
(A) The compression terminal can be easily attached and detached.
(C) Since the range of application of overhead wires and branch lines is wide, it can respond quickly to restoration work.

  Although the T-shaped clamp for electric wire connection according to the present invention has disclosed an embodiment in which a branch line having a compression terminal at the terminal can be connected so as to be orthogonal to the overhead electric wire, the terminal has a compression terminal at the terminal with respect to the lead wire. It is also possible to connect the branch lines so as to be orthogonal.

2.3 Compression terminal 2a, 3a Battledore part 2c, 3c Compression part 10 T-type clamp (T-type clamp for wire connection)
11.12 Pair of conductive members 11a, 12a Pair of recesses 11h, 12h Bolt hole W Overhead electric wire We Branch line

Claims (3)

A T-shaped clamp for electric wire connection in which a branch line having a compression terminal at the terminal can be connected so as to be orthogonal to the overhead electric wire,
A pair of plate-like conductive members that are configured so that one end side is rotatably connected and the other end side can be freely opened and closed,
These conductive members have a semicircular arc-shaped recess that clamps the overhead electric wire from the outer peripheral direction on one end side,
The compression terminal is
A plate-shaped battledore part having one or more bolt holes opened;
A cylindrical compression part that is molded integrally with this battledore part, and that is compressed and connected by inserting the end of the branch line,
One said electrically-conductive member is a T-shaped clamp for electric wire connection which has a bolt hole which can fasten the said wing board part so that the axial direction of the said compression part and the said overhead electric wire can be arrange | positioned substantially orthogonally.   The electric wire connecting T-shaped clamp according to claim 1, wherein one of the conductive members has an area capable of fixing two or more types of the feather plate portions having different outer shapes.   The T-shaped clamp for connecting an electric wire according to claim 1 or 2, further comprising a split collar which forms a plurality of pairs having different inner diameters corresponding to the overhead electric wires having different diameters, which are housed in the recess.

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