Pole switch

Abstract

To provide a pole switch which is constructed to be able to bear the weight of the whole of the pole switch and which is capable of securing high safety by reliably turning the main circuit off when hoisting the pole switch.SOLUTION: A pole switch 100 according to the present invention is constructed to be mounted to an electric pole of a power distribution system. The pole switch 100 is characterized by comprising: a make / break mechanism 140 for making and breaking the contact of a fixed electrode 142 and a movable electrode 144; a trip mechanism 150 for performing the trip operation of the make / break mechanism 140; a trip lever 154 for mechanically actuating the trip mechanism 150; a lifting hook 130 located at the top; a shaft 120 to which the lifting hook 130 is attached; and an interlock mechanism 160 for actuating the trip mechanism 150 by operating the trip lever 154 due to the fact that the shaft 120 is lifted.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a pole-mounted switch arranged on a utility pole of a power distribution system. [Background technology]

[0002] Pole switches are installed on utility poles in power distribution systems to separate distribution lines during work or to disconnect them in the event of a fault. In the installation of pole switches, sufficient safety was ensured by turning off the circuit when lifting the pole switch. However, if the "off" operation is forgotten before lifting, the distribution line will be connected with the circuit "on," compromising safety.

[0003] For example, Patent Document 1 discloses a switch comprising: "a switch body having a first connection part for connecting primary side electric wires and a second connection part for connecting secondary side electric wires; a switching part that is provided so as to be able to change its posture relative to the switch body and that is switchable between an ON state in which the electric wires connected to the first connection part and the electric wires connected to the second connection part are electrically connected and an OFF state in which the electric wires connected to the first connection part and the electric wires connected to the second connection part are disconnected as the posture is changed; a lifting member that is detachable from the switch body; and locking means that enables the lifting member to be fixed to the switch body when the switching part is in the OFF state rather than the ON state."

[0004] According to Patent Document 1, by providing a lifting member, if an attempt is made to lift the switch using the lifting member when the opening / closing unit is in the ON state, the lifting member will come off the switch body. Therefore, since the switch cannot be lifted with the opening / closing unit in the ON state, it is possible to prevent the switch from being lifted when the opening / closing unit is in the ON state. Also, Patent Document 1 states that by providing a locking means, it becomes possible to lift the switch using the lifting member by turning the opening / closing unit off and fixing the lifting member to the switch body with the locking means. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-192346 A Summary of the Invention [Problem to be solved by the invention]

[0006] The locking means of Patent Document 1 is comprised of "a locking member body into which the lifting member can be inserted, and a retaining member that prevents the lifting member inserted into the locking member body from coming off." The blade portion of the retaining member fits into the fitting groove of the lifting member, thereby preventing the lifting member from coming off.

[0007] In the configuration of Patent Document 1, when the lifting member is lifted to install the switchgear, the weight of the entire switchgear is placed on the blade portion of the anti-pullout member. Since the switchgear weighs several tens of kilograms, the flat blade portion cannot withstand the weight of the switchgear and may be deformed or damaged. Therefore, there is room for further improvement in the technology of Patent Document 1.

[0008] In view of these problems, the present invention aims to provide a pole-mounted switch that has a structure capable of withstanding the weight of the entire pole-mounted switch when it is hoisted, while ensuring high safety by reliably turning off the main circuit. [Means for solving the problem]

[0009] In order to solve the above problems, a representative configuration of a pole-mounted switch according to the present invention is a pole-mounted switch placed on a utility pole of a power distribution system, and is characterized by comprising an opening / closing mechanism that opens and closes a fixed electrode and a movable electrode, a tripping mechanism that performs the tripping operation of the opening / closing mechanism, a tripping lever that mechanically operates the tripping mechanism, a lifting hook arranged on the upper part, a shaft to which the lifting hook is attached, and an interlocking mechanism that moves the tripping lever when the shaft is pulled up, thereby operating the tripping mechanism.

[0010] The pole-mounted switch has a first link member that rotates in conjunction with the opening and closing mechanism, a first sloping surface formed on the first link member, a second sloping surface formed on the tripping lever and facing the first sloping surface, a first engagement portion formed on the side opposite the second sloping surface of the tripping lever, a second link member adjacent to the tripping lever and in conjunction with the tripping mechanism, and a second engagement portion formed on the second link member and facing the first engagement portion, and when the opening and closing mechanism is in the on state, when the tripping lever rotates, the second sloping surface abuts and slides against the first sloping surface of the first link member, causing the tripping lever to move toward the second link member, and the first engagement portion of the tripping lever and the second engagement portion of the second link member engage to rotate the second link member, and when the opening and closing mechanism is in the off state, the second sloping surface of the tripping lever does not abut against the first sloping surface of the first link member, the notches of the tripping lever and the second link member do not engage, and the second link member does not rotate. Effect of the Invention

[0011] According to the present invention, it is possible to provide a pole-mounted switch that has a structure capable of withstanding the weight of the entire pole-mounted switch when it is hoisted, while ensuring high safety by reliably turning off the main circuit. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is an overall perspective view of the appearance of the pole switch of the present embodiment. [Diagram 2] FIG. 2 is a perspective view illustrating a main part of the internal structure of the pole switch of the present embodiment. [Diagram 3] FIG. 3 is an exploded perspective view of the pole switch of FIG. 2. [Figure 4] FIG. 4 is a perspective view illustrating the details of the interlocking mechanism. [Diagram 5] 11A and 11B are diagrams illustrating the operation of the interlocking mechanism. [Figure 6] 2 is an exploded perspective view of a first link member, a tripping lever, and a second link member. FIG. [Figure 7] FIG. 5 is an enlarged perspective view of the vicinity of the rotation shaft in FIG. 4. [Figure 8] FIG. 5 is an enlarged perspective view of the vicinity of the rotation shaft in FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific values ​​shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In this specification and drawings, elements having substantially the same functions and configurations are given the same reference numerals to avoid repeated explanations, and elements not directly related to the present invention are not shown.

[0014] Fig. 1 is an overall perspective view of the exterior of a pole-mounted switch 100 of this embodiment. The pole-mounted switch 100 shown in Fig. 1 is a switch placed on a utility pole of a power distribution system, and specifically, a switch for construction work can be mentioned. The pole-mounted switch 100 has a casing 110, and three bushings 102a, 102b for connecting electric wires are attached to each of two side surfaces 110a of the casing 110 (one side surface is not shown).

[0015] Attached to the front surface 110b of the casing 110 are a handle 104 for manually opening and closing the circuit of the pole switch 100, and an indicator 106 that rotates in conjunction with the on / off state of the pole switch 100. The indicator 106 shows whether the circuit of the pole switch 100 is in the on or off state.

[0016] A U-shaped hanger 112 is attached to the upper part of the front surface 110b and the rear surface (the rear surface is not shown in FIG. 1) of the casing 110. A bracket 114 is attached to the hanger 112, and a shaft 120 is held by the bracket 114. By attaching a lifting hook 130 to this shaft 120, the lifting hook 130 is disposed on the upper part of the pole switch 100, and the pole switch 100 can be lifted by pulling up the lifting hook 130.

[0017] Fig. 2 is a perspective view for explaining the main parts of the internal structure of the pole switch 100 of this embodiment. Fig. 3 is an exploded perspective view of the pole switch 100 of Fig. 2. Figs. 2 and 3 show the pole switch 100 of Fig. 1 with the casing 110, hanger 112, bracket 114, and other members removed.

[0018] 2 and 3, the pole-mounted switch 100 of this embodiment is configured to include an opening / closing mechanism 140, a pull-out mechanism 150, and an interlocking mechanism 160. The opening / closing mechanism 140 opens and closes a fixed electrode 142 connected to the bushing 102a and a movable electrode 144 connected to the bushing 102b. When the opening / closing mechanism 140 is operated by manipulating the handle 104 and the fixed electrode 142 and the movable electrode 144 are connected, the circuit is turned on, and when the fixed electrode 142 and the movable electrode 144 are disconnected, the circuit is turned off.

[0019] The tripping mechanism 150 is provided with a tripping lever 154, and when the tripping lever 154 is operated, the tripping mechanism 150 is mechanically operated to perform a tripping operation to disconnect the line of the switching mechanism 140.

[0020] Fig. 4 is a perspective view for explaining the details of the interlocking mechanism 160. When the shaft 120 is pulled up, the interlocking mechanism 160 shown in Fig. 4 finally moves the tripping lever 154, thereby activating the tripping mechanism 150. As shown in Fig. 4, the interlocking mechanism 160 includes a compression spring 162, a slide pin 164, a slide pipe 166, a first rotating member 172, a second rotating member 174, a third rotating member 176, and a release lever 178.

[0021] The compression spring 162 is fitted onto the shaft 120 and biases the shaft 120 downward, thereby preventing unexpected tripping. The slide pin 164 is disposed so as to protrude outward from the shaft 120 and moves in accordance with the up and down movement of the shaft 120. The slide pipe 166 is disposed outside the compression spring 162 and has a slit 166a formed therein, which serves as a movement path for the slide pin 164. The compression spring 162, slide pin 164 and slide pipe 166 are disposed below the bracket 114 (see FIG. 1).

[0022] The first rotating member 172, the second rotating member 174 and the third rotating member 176 are members (link mechanism) for interlocking the slide pipe 166 and the release lever 178, and further, the shaft 120 and the tripping lever 154.

[0023] The first rotating member 172 has one end connected to a tab 166b formed on the outer periphery of the slide pipe 166, and the other end connected to a second rotating member 174. The second rotating member 174 has one end connected to the first rotating member 172, and the other end connected to a third rotating member 176. The third rotating member 176 has one end connected to the second rotating member 174, and the other end connected to a release lever 178. The release lever 178 is a substantially L-shaped member, and has one end connected to the third rotating member 176 and the other end in contact with the tripping lever 154. The release lever 178 is substantially L-shaped because the tripping lever 154 is movable in the axial direction of the rotation shaft 180, as described later (see Figures 7 and 8).

[0024] 4, in this embodiment, a first link member 146 and a second link member 156 are attached to the rotating shaft 180 to which the tripping lever 154 is attached. The first link member 146 is a part of the components of the opening / closing mechanism 140, is disposed adjacent to the tripping lever 154, and rotates in conjunction with the opening / closing mechanism 140. The second link member 156 is a part of the components of the tripping mechanism 150, is disposed adjacent to the tripping lever 154, and rotates in conjunction with the tripping mechanism 150.

[0025] Fig. 5 is a diagram for explaining the operation of the interlocking mechanism 160. Figs. 5(a) and (b) show an example of the state in which the casing 110 is observed from the front side. Figs. 5(c) and (d) show an example of the state in which the casing 110 is observed from above.

[0026] As shown in Figures 5(a) and 5(c), when the lifting hook 130 is not lifted, the shaft 120 is biased by the compression spring 162 (see Figure 4) to be located at the lowest position. When the lifting hook 130 is lifted in the raised position as shown in Figures 5(b) and 5(d), the shaft 120 is pulled up.

[0027] 4 and 5(b), when the lifting hook 130 is lifted up, the shaft 120 also moves upward (in the direction of D1). This causes the slide pin 164 to move upward (in the direction of D2), and the slit 166a is guided by the slide pin 164, causing the slide pipe 166 to rotate in the direction of D3. Due to this rotation, the first rotating member 172 is pushed in the direction of D4, and the second rotating member 174 rotates in the direction of D5.

[0028] When the third rotating member 176 rotates in the direction D6 in conjunction with the rotation of the second rotating member 174, the release lever 178 moves linearly in the direction D7. Then, the tripping lever 154 is pushed by the release lever 178 and rotates in the direction D8. That is, according to the interlocking mechanism 160 described above, the shaft 120 is pulled up, thereby operating the tripping lever 154.

[0029] According to the pole switch 100 of this embodiment, when the shaft 120 is pulled up, the interlocking mechanism 160 operates the tripping lever 154, which mechanically operates the tripping mechanism 150 and causes the opening / closing mechanism 140 to trip. Therefore, when the pole switch 100 is lifted by the lifting hook 130, the circuit of the pole switch 100 is inevitably opened. For this reason, when the pole switch 100 is lifted, the main circuit is reliably opened, thereby making it possible to obtain a high level of safety.

[0030] Furthermore, the weight of the pole-mounted switch 100 when hoisted is applied to the shaft 120, but the shaft 120 is held by the bracket 114, and the bracket 114 is attached to the casing 110 via the hanger 112. This makes it possible to prevent the weight of the pole-mounted switch 100 from being concentrated locally, and makes it possible to provide a structure capable of withstanding the entire weight of the pole-mounted switch 100.

[0031] Here, if the circuit is already in the OFF state before the pole-mounted switch 100 is hoisted, there is no need to perform a tripping operation of the opening / closing mechanism 140 when hoisting. Therefore, in the pole-mounted switch 100 of this embodiment, when in the OFF state, even if the tripping lever 154 rotates in the D8 direction, the second link member 156 is cut so as not to rotate in the D9 direction, thereby controlling the tripping operation of the opening / closing mechanism 140.

[0032] Fig. 6 is an exploded perspective view of the first link member 146, the tripping lever 154, and the second link member 156. Fig. 6(a) is a perspective view of the first link member 146, the tripping lever 154, and the second link member 156 observed from the side of the pole opening / closing switch 100 (see Fig. 1). Fig. 6(b) is a perspective view of the first link 146, the tripping lever 154, and the second link member 156 in Fig. 6(a) observed from a different angle.

[0033] 6(a) and (b), the first link member 146 is formed with a first protruding portion 146a that protrudes toward the tripping lever 154 along the rotation shaft 180 (see FIG. 4). The first protruding portion 146a has a first inclined surface 146b that has a shape in which a part of a cylinder is cut out obliquely.

[0034] The tripping lever 154 has a second protruding portion 154a formed on a surface facing the first link member 146. The second protruding portion 154a protrudes toward the first link member 146 along the rotation shaft 180, and has a second inclined surface 154b having a shape in which a part of a cylinder is cut out obliquely. The first inclined surface 146b and the second inclined surface 154b are disposed so as to face each other.

[0035] Further, the tripping lever 154 has a first engagement portion 154c formed on a surface (the surface opposite to the second inclined surface 154b) facing the second link member 156. The first engagement portion 154c is a notched portion that protrudes toward the second link member 156 along the rotation shaft 180.

[0036] The second link member 156 is formed with a notched second engagement portion 156a that protrudes toward the tripping lever 154 along the rotation shaft 180. The first engagement portion 154c and the second engagement portion 156a are disposed to face each other.

[0037] Figures 7 and 8 are enlarged perspective views of the vicinity of the rotating shaft 180 in Figure 4. Figures 7 and 8 show a state in which the first link member 146, the tripping lever 154, and the second link member 156 shown in Figure 6 are assembled to the rotating shaft 180. In Figures 7 and 8, the tripping lever 154 is pushed by the release lever 178 and rotated in the D8 direction.

[0038] 7(a) is a perspective view of the vicinity of the rotating shaft 180 when the opening / closing mechanism 140 is in the ON state, as viewed from below the device. FIG. 7(b) is a perspective view of the vicinity of the rotating shaft 180 in FIG. 7(a), as viewed from the left side of the device. When the opening / closing mechanism 140 is in the ON state, the first link member 146 is rotated to the right in the figure, and the first inclined surface 146b is in a position rotated to the left in the figure. When the interlocking mechanism 160 is actuated and the tripping lever 154 is rotated to the left in the figure (direction D8), as shown in FIG. 7(a), the tripping lever 154 moves toward the second link member 156 while compressing the spring 192, while the second inclined surface 154b abuts and slides against the first inclined surface 146b of the first link member 146.

[0039] 7(b), the first engagement portion 154c and the second engagement portion 156a mesh with each other to rotate the second link member 156. Then, the rotation of the second link member 156 in the D9 direction causes the tripping mechanism 150 to trip, and the circuit of the pole switch 100 is turned off.

[0040] FIG. 8(a) is a perspective view of the vicinity of the rotating shaft 180 when the opening / closing mechanism 140 is in the OFF state, as viewed from below the device. FIG. 8(b) is a perspective view of the vicinity of the rotating shaft 180 in FIG. 8(a) as viewed from the left side of the device. When the opening / closing mechanism 140 is in the OFF state, the first link member 146 is rotated to the left side in the figure, and the first inclined surface 146b is in a position rotated to the right side in the figure. Then, even if the interlocking mechanism 160 operates and the tripping lever 154 rotates (in the D8 direction), the second inclined surface 154b of the tripping lever 154 does not abut against the first inclined surface 146b of the first link member 146 as shown in FIG. 8(a). Therefore, the tripping lever 154 does not move toward the second link member 156, and is biased toward the first link member 146 by the spring 192.

[0041] 8(b), the first engagement portion 154c of the tripping lever 154 and the second engagement portion 156a of the second link member 156 do not mesh, so the second link member 156 does not rotate. Therefore, the tripping operation of the tripping mechanism 150 is not performed. In other words, when the opening / closing mechanism 140 is in the OFF state, the edge between the tripping lever 154 and the second link member 156 is cut, so that the tripping operation by the tripping mechanism 150 is not performed.

[0042] According to the above configuration, even when the pole-mounted switch 100 is hoisted, the tripping operation is performed only when the switching mechanism 140 is in the ON state, and the tripping operation is not performed when the switching mechanism 140 is in the OFF state. Therefore, it is possible to limit the tripping operation when it is not necessary.

[0043] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above-described embodiment. It is clear that a person skilled in the art can think of various modifications or alterations within the scope of the claims, and it is understood that these also naturally belong to the technical scope of the present invention. [Industrial Applicability]

[0044] The present invention can be used as a pole-mounted switch disposed on a utility pole of a power distribution system. [Explanation of symbols]

[0045] 100...pole-mounted switch, 102a...bushing, 102b...bushing, 104...handle, 106...indicator, 110...casing, 110a...side, 110b...front, 112...hanger, 114...bracket, 120...shaft, 130...hoisting hook, 140...opening / closing mechanism, 142...fixed electrode, 144...movable electrode, 146...first link member, 146a...first protrusion, 146b...first inclined surface, 150...release mechanism, 154...pull Release lever, 154a...second protrusion, 154b...second inclined surface, 154c...first engagement portion, 156...second link member, 156a...second engagement portion, 160...interlocking mechanism, 162...compression spring, 164...slide pin, 166...slide pipe, 166a...slit, 166b...tab, 172...first rotating member, 174...second rotating member, 176...third rotating member, 178...release lever, 180...rotating shaft, 190...spring, 192...spring

Claims

1. A pole-mounted switch disposed on a utility pole of a power distribution system, an opening / closing mechanism for opening and closing the fixed electrode and the movable electrode; a tripping mechanism for tripping the opening / closing mechanism; a tripping lever for mechanically operating the tripping mechanism; A lifting hook is placed on the top, a shaft to which the lifting hook is attached; a linkage mechanism that moves the tripping lever by pulling up the shaft, thereby activating the tripping mechanism; A pole-mounted switch comprising:

2. A first link member that rotates in conjunction with the opening and closing mechanism; a first inclined surface formed on the first link member; a second inclined surface formed on the tripping lever and facing the first inclined surface; a first engagement portion formed on the tripping lever on a side opposite to the second inclined surface; a second link member adjacent to the tripping lever and linked to the tripping mechanism; a second engaging portion formed on the second link member and facing the first engaging portion; having When the opening / closing mechanism is in an ON state, when the tripping lever rotates, the second inclined surface abuts against and slides on the first inclined surface of the first link member, so that the tripping lever moves toward the second link member, and the first engaging portion of the tripping lever and the second engaging portion of the second link member mesh with each other to rotate the second link member, 2. The pole-mounted switch according to claim 1, characterized in that, when the opening / closing mechanism is in the off state, the second inclined surface of the tripping lever does not abut the first inclined surface of the first link member, the notches of the tripping lever and the second link member do not engage with each other, and the second link member does not rotate.

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