JP4721884B2 - Electric wire switch - Google Patents

Description

  The present invention relates to a switch for an electric wire provided with a bushing for connecting each electric wire such as a distribution line and a lead-in line installed on a power pole or the like, or a distribution line and a distribution line. It is related with the switch for electric wires currently fixed through.

  Electric wires installed on the power pole, for example, distribution lines and service lines, or distribution lines and distribution lines are appropriately connected to a switch for electric wires (hereinafter, mainly referred to as “switch”) attached to the power pole. As shown in FIG. 6, the switch disclosed in Patent Document 1 is fixed in a state in which bushings 101 and 102 are passed through the opposing side surfaces 111 and 112 of a box-shaped case 110. The bushings 101 and 102 are a set of three and a pair of two sets, and a total of six are fixed. The bushing 101 of one set (left side in the drawing) is connected to a distribution line (not shown in FIG. 6) as a power supply side, and the bushing 102 of the other set (right side in the drawing) is a lead-in wire (shown in FIG. 6 as a load side). Not shown) is connected.

  A fixed electrode 103 is attached to the inner end of each bushing 101 and 102 protruding into the case 110 (only the load side is shown), and each bushing 101 and 102 is connected by a switch 120 that contacts and separates from this fixed electrode 103. The distribution line and the lead-in line connected to the switch are switched between a connected state and a disconnected state.

  The switch 120 includes a movable electrode 122 that contacts and separates from the fixed electrode 103 in the case 110. The movable electrode 122 includes an arm 122a that is supported by a driven shaft (not shown) and swings, and contact portions 122b that are attached to both ends of the arm 122a. The driven shaft rotates in the circumferential direction in conjunction with the driving shaft 123. The driving shaft 123 passes through both side surfaces 113 and 114 of the case 110 to which the bushings 101 and 102 are not fixed, and an intermediate shaft (not shown) is sandwiched between the driven shaft and the driving shaft 123.

  A lever 124 is fixed to one end of the driving shaft 123 protruding from one side 113 of the case 110. A driving shaft 123 is fixed to the center of the lever 124, and operation strings (not shown) are attached to both ends of the lever 124. A pointer (not shown) for indicating the “on” and “off” states of the switch 120 is attached to the other end of the driving shaft 123 protruding from the other side surface 114 of the case 110. In such a switch, normally, the switch 120 is turned on, each movable electrode 122 and each fixed electrode 103 are joined, and the distribution line 31 and the lead-in line 32 are connected as shown in FIG.

  The distribution line 31 and the lead-in line 32 are connected to a switch attached to the utility pole P, for example. The lead-in wire 32 is drawn into the electric room R in the building B or the like. Then, when shutting off the distribution line 31 and the lead-in line 32, such as inspecting the electric chamber R in which the lead-in line 32 is drawn in, the switch 120 is turned off, so that the operating string is pulled and the lever 124 is moved. Then, the arm 122a moves and each movable electrode 122 is separated from each fixed electrode 103, whereby the distribution line 31 and the lead-in line 32 are blocked.

JP-A-8-27396

  Since the movable electrode 122 of the conventional switch has the contact portions 122b attached to both ends of the swinging arm 122a, the bushing 102 to which the fixed electrode 103 that contacts and separates from the movable electrode 122 is attached to the case 110. Are fixed to the opposing side surfaces 111 and 112. Therefore, the bushing 102 on the load side connecting the lead-in wire 32 protrudes toward the building B as shown in FIG. 7, and the lead-in wire 32 approaches the building B. If the distance between the lead-in wire 32 and the building B is within 1.2 m, it will be in a dangerous state.

  However, when the utility pole P is installed on, for example, a narrow sidewalk, the distance between the service line 32 and the building B may not be 1.2 m or more. Moreover, since the soundproof sheet used when dismantling the building B is projected and stretched from the wall surface of the building B, it may be close to the lead-in wire 32.

  Furthermore, as shown in FIG. 8, the switch may connect two distribution lines 31 and 31 installed vertically. In this case, for example, the lead wire 33 branched from the upper distribution line 31 is connected to one bushing 101, and the lead wire 33 branched from the lower distribution line 31 is connected to the other bushing 102. Since the bushings 101 and 102 are fixed to the opposite side surfaces, the lead wires 33 and 33 are led out in opposite directions. Therefore, when working with the bucket of an aerial work vehicle raised near the switch, the lead wire 33 may interfere with the work, and the work space may not be secured.

  Then, this invention makes it a subject to provide the switch for electric wires which enabled it to connect each electric wire like a distribution line and a lead-in line or a distribution line and a distribution line in the same direction.

In the electrical switch according to the present invention, a pair or a plurality of pairs of bushings for connecting electrical wires are fixed through the side plates of a box-type case, and fixed electrodes are attached to the inner end portions of the bushings. A switch for electric wires in which electrodes are connected and cut off by a switch. Each bushing can be fixed to the opposite side surface, and the switch can be arranged between fixed electrodes attached to the inner end of each bushing. Use a case of a size, and fix the one or more pairs of bushings to one of the opposing side surfaces, and not fix the bushing to the other side of the opposing side surfaces. An empty space is provided, and a lightning arrester that is electrically connected to one fixed electrode is accommodated in the empty space .

According to this electric wire switch, the electric wires connected to the bushing are directed in the same direction because the bushing is fixed to one side surface of the case. Therefore, in the wire switch that connects the distribution line and the lead-in line, the lead-in line is connected to the bushing so as not to face the building. It can be secured and installed. In addition, in a wire switch that connects two lines of distribution lines, the lead wire is led out only to one side of the wire switch, so that work on an aerial work vehicle can be performed efficiently. Moreover, the other side where the bushing of the switch for electric wires is not fixed can be used as a work area.
Moreover, the switch for electric wires which concerns on this invention can be reduced in size rather than the conventional switch for electric wires by fixing a bushing to one surface of a case. However, a lightning arrester can be accommodated by using a case having the same size as the conventional case. Since this lightning arrester is electrically connected to the shaft, it operates with the switch turned on.

  Further, in the wire switch according to the present invention, the switch is held by a shaft having one end electrically connected to one fixed electrode, and the other end contacts and separates from the other fixed electrode. It is preferable that a movable electrode that swings is provided.

  According to this electric wire switch, the shaft is electrically connected to one fixed electrode, and the movable electrode held on this shaft is attached to each bushing by a switch that swings so as to contact and separate from the other fixed electrode. It is possible to “turn on” and “turn off” between the state where the fixed electrodes are connected and the state where they are disconnected. That is, when the movable electrode is joined to the other fixed electrode, the switch is turned on. Then, when the movable electrode is separated from the other fixed electrode, the switch is turned off. Since the movable electrode has one end held on the shaft and swings, and the other end is in contact with and away from the fixed electrode, the bushing to which each fixed electrode is attached is fixed to one side surface of the case. be able to.

  In the electric wire switch according to the present invention, it is preferable that the shaft is connected to a lever that swings outside the case.

  According to this wire switch, the arm can be swung by operating the lever because the shaft is connected to the lever that swings outside the case. Remote control means such as an operating string and an operating rod are attached to the lever. Therefore, even if the electric wire switch is attached to a high place near the upper end of the utility pole, the switch can be turned on and off by remote control.

Moreover, in the electric wire switch according to the present invention, information may be displayed on the other side of the opposing side surfaces .

  According to this electric wire switch, an accident can be prevented by displaying information such as “high voltage danger” on the surface where the bushing is not projected. In addition, since the bushing is fixed to one side surface of the case and the bushing is not provided on the other side surface of the case, information can be displayed on the other side surface of the case.

  In the electric wire switch according to the present invention, it is preferable that the pair or the plurality of pairs of bushings are arranged vertically.

  According to this electric wire switch, a pair or a plurality of pairs of bushings are arranged up and down, so that the distribution line is connected to the upper bushing, the lead-in wire is connected to the lower bushing, In the two systems of distribution lines, the lead wires led out from the distribution lines of each system can be connected to the upper bushing and the lower bushing so that the wires are not entangled. Further, when the switch includes a swinging arm, the movable electrode can be brought into and out of contact with the fixed electrode only by changing the direction of the arm between the horizontal posture and the inclined posture.

  According to the present invention, since the bushing is fixed to one side surface of the case, when the distribution line and the lead-in line are connected to the bushing, the lead-in line is not led out toward the building. Can do. Therefore, a lead-in wire can be safely connected by attaching this electric wire switch also to the utility pole installed in the vicinity of the building. As a result, the electric wire switch has fewer restrictions on where it is attached and can improve versatility.

  Also, when this wire switch is attached to a utility pole to connect two distribution lines, the lead wire connected to the bushing is led out to the same side, and the work area is provided on the opposite side Therefore, workability around the wire switch can be improved.

  One embodiment of a wire switch according to the present invention will be described with reference to FIGS. This switch is characterized in that a pair or a plurality of pairs of bushings 1 and 2 are passed through and fixed to one side surface 11 of a box-shaped case 10. The bushings 1 and 2 shown in FIG. 1 show a case where a pair of three bushings, i.e., six are fixed, but the bushings 1 and 2 are one, two, or four or more, Moreover, you may be comprised by 2 or more pairs. In any case, one set of bushings 1 is arranged above and below, and the other set of bushings 2 is arranged below.

  The fixed electrodes 3 and 3 are attached to the inner ends of the bushings 1 and 2 in the case 10 as shown in FIGS. 2B and 3B. Each fixed electrode 3 is connected / disconnected when the switch 20 is turned on / off. The switch 20 includes a movable electrode 22 that swings about a shaft 21 that is electrically connected to one fixed electrode 3 and that contacts and separates from the other fixed electrode 3. As shown in the figure, the shaft 21 is connected to the lower fixed electrode 3 and the movable electrode 22 is not limited to the upper fixed electrode 3, but the shaft 21 is connected to the upper fixed electrode 3 and the lower electrode 3 is connected to the lower fixed electrode 3. The movable electrode 22 may be in contact with or away from the electrode on the side.

  In any case, as shown in the figure, the movable electrode 22 is provided with a contact portion 22b that contacts and separates from the other fixed electrode 3 at the other end of the arm 22a whose one end is held by the shaft 21. The other end portion of the arm 22a is bent to provide a contact portion 22b. The other fixed electrode 3 is formed in a bottomed curved tube shape for inserting and removing the contact portion 22b at the tip of the arm 22a. The shapes of the movable electrode 22 and the fixed electrode 3 are not specified such that the movable electrode 22 has a rod shape and the other fixed electrodes 3 have a plate shape.

  The shaft 21 is connected to a lever 24 that swings outside the case 10. The shaft 21 may be one that connects the arm 22a and the lever 24 alone, or may be connected via a shaft that is not shown. In any case, the shaft 21 is fixed to the center of the lever 24, and a remote operation means (not shown) such as an operation string or an operation rod is attached to each end of the lever 24. By pulling the remote control means, the lever 24 swings, the arm 22a swings in conjunction with it, and the contact portion 22b contacts and separates from the other fixed electrode 3.

  The shaft 21 for connecting the lever 24 is bridged so as to protrude from both side surfaces 13 and 14 on the side where the bushings 1 and 2 are not fixed. 25 is fixed. Characters “ON” and “OFF” are displayed on the side surface 14 of the case 10 indicated by the pointer 25.

  In addition, information such as “high-pressure danger” is displayed on the side surface 12 of the case 10 facing the surface on which the bushings 1 and 2 are fixed (see FIG. 5). Since the bushings 1 and 2 are fixed to one side surface 11 of the case 10 and parts such as the bushings 1 and 2 are not fixed to the opposite side surface 12, information can be displayed. An accident can be prevented by displaying “high-pressure danger”.

  A lightning arrester 5 is accommodated in the case 10. Since the case 10 is provided with an arm 22 a having one end held by the shaft 21, an empty space is generated in the case 10 when the conventional case 10 is used. The lightning arrester 5 can be installed in this empty space. The lightning arrester 5 is electrically connected to the shaft 21 and is connected to the distribution line 31 in a state where the switch 20 is “ON”, that is, in a state where the movable electrode 22 is joined to the other fixed electrode 3.

  The switch 20 is normally in an “ON” state as shown in FIG. That is, when the movable electrode 22 and the other fixed electrode 3 are joined, both the fixed electrodes 3 and 3 are connected. At this time, the lightning arrester 5 is also connected to the distribution line 31 to ensure safety. When the lever 24 is moved by operating the remote control means, the switch 20 is turned off as shown in FIG. 3, the movable electrode 22 is separated from the other fixed electrode 3, and both the fixed electrodes 3, 3 is blocked.

  As shown in FIG. 4, a distribution line 31 and a lead-in line 32 installed on the utility pole P are connected to the bushings 1 and 2 of such a switch. The distribution line 31 is connected to the upper bushing 1, and the lead-in line 32 is connected to the lower bushing 2, but both the bushings 1 and 2 are fixed to one side surface 11 of the case 10. The lead-in wire 32 is also led out in the opposite direction to the building B. Therefore, even if the utility pole P to which the distribution line 31 is attached is installed on a narrow sidewalk or the like, the lead-in wire 32 is not close to the building B, and safety can be ensured.

  In addition, as shown in FIG. 5, the switch is connected to bushings 1 and 2 in which lead wires 33 and 33 branched from the two distribution lines 31 and 31 are fixed to one side surface 11 of the case 10. The Since the lead wire 33 connected to the upper bushing 1 and the lead wire 33 connected to the lower bushing 2 are led out in the same direction, a work area is provided in the other direction. Therefore, work efficiency improves when the bucket of an aerial work vehicle rises and works.

  In addition, this invention can be variously changed within the range of the invention specific matter described in the claim, without being limited to the above-mentioned embodiment. For example, the lightning arrester 5 may not be housed in the case 10 and may be made compact. Further, the movable electrode 22 may be swung by a button switch or a remote controller without being swung by the lever 24. Moreover, a pair or several pairs of bushings 1 and 1 are good also as what is arrange | positioned in a horizontal direction according to an installation condition.

It is a perspective view showing one embodiment of a switch for electric wires concerning the present invention. It is one Embodiment which shows the state of "ON" of the switch for electric wires which concerns on this invention, Comprising: (a) is a front view, (b) is a cross-sectional front view. It is one Embodiment which shows the state of "cut" of the switch for electric wires which concerns on this invention, Comprising: (a) is a front view, (b) is a cross-sectional front view. It is a front view which shows the usage example of the switch for electric wires which concerns on this invention. It is a perspective view which shows the usage example different from FIG. 4 of the switch for electric wires which concerns on this invention. It is a partial cross section front view of the conventional switch for electric wires. It is a front view which shows the usage example of the conventional switch for electric wires. It is a perspective view which shows the usage example different from FIG. 7 of the conventional switch for electric wires.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bushing 2 ... Bushing 3 ... Fixed electrode 5 ... Lightning arrester 10 ... Case 11 ... (Bushing is fixed) Side surface 12 ... (Information is displayed) Side surface 20 ... Switch 22 ... Movable electrode 24 ... Lever 31 ... Distribution line (electric wire)
32 ... Lead-in wire (electric wire)
33 ... Lead wire (electric wire)

Claims (5)

One or more pairs of bushings that connect the wires are fixed through the side plate of the box-shaped case, fixed electrodes are attached to the inner ends of the bushings, and the fixed electrodes are connected and cut off by switches. Switch for
Each bushing is fixed to the opposite side surface, and a case having a size capable of arranging a switch between fixed electrodes attached to the inner end of each bushing is used, and one of the opposite side surfaces is used. A pair of bushings is fixed to the side surface, and a bushing is not fixed to the other side surface of the opposing side surfaces, thereby providing an empty space in the case. A switch for an electric wire, characterized in that a lightning arrester to be connected is housed .   The switch includes a movable electrode that is held by a shaft that is electrically connected to one fixed electrode at one end and swings so that the other end contacts and separates from the other fixed electrode. The electric wire switch according to claim 1.   3. The electric wire switch according to claim 2, wherein the shaft is connected to a lever that swings outside the case. The electric wire switch according to any one of claims 1 to 3, wherein information is displayed on the other of the opposing side surfaces . The electric wire switch according to any one of claims 1 to 4, wherein the pair or the plurality of pairs of bushings are arranged vertically .

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