JP2007005146A - Movable electrode part stopper structure of switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize a maximum open position of a movable electrode to prevent it from contacting an insulation case or the like to damage the same. <P>SOLUTION: The switch is provided with a movable electrode part 5 capable of turning inside the case, a part near a rotating support part of the movable electrode part 5 is constructed of two sheets of plate members 20a, 20b. When the movable electrode part 5 is rotated up to a maximum open position, a stopper 23 coming in plane contact with faces 20d, 20e at the case side in each plate member 20a, 20b is provided at the case side, and is formed of a non-elastic member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a movable electrode portion stopper structure of a switch, and more particularly to a movable electrode portion stopper structure of a switch used to open and close an electric circuit such as a high voltage distribution line.

  Conventionally, as a switch with a case for opening and closing the circuit of the high-voltage distribution line, the bushing is penetrated and supported on both side surfaces of the main body case, and the bushings on both sides are provided at opposite positions, and the inner end of one bushing Is provided with a fixed electrode, and a movable electrode is provided at the inner end of the other bushing so that it can rotate. By covering both electrodes for each phase, insulation between phases and ground is achieved, and relative movement between adjacent insulation barriers is performed. There is known a switch provided with an engaging means for preventing the above. The movable electrode contacts and separates from the fixed electrode by rotating.

  In the above configuration, a hollow cushion formed of an elastic material is provided inside the case, and the tip of the cushion is disposed so as to be positioned near the back of the tip of the movable electrode when the movable electrode is opened. Yes.

In the opening operation of the movable electrode, when the movable electrode overruns from a predetermined stop position, the back surface of the movable electrode comes into contact with the cushion, and the cushion is crushed. As a result, it is known that air in the cushion is ejected from a hole provided at the tip of the cushion to prevent the movable electrode from rotating (see Patent Document 1).
JP 2002-84607 A

  In recent years, switches are required to be compact, and the distance between the insulating case covering the electrode portion and the movable electrode tends to be narrow.

  In the conventional switch described above, since the maximum opening position of the movable electrode is regulated by the cushion, the maximum opening position of the movable electrode is not stable. Therefore, if the distance between the insulating case and the movable electrode becomes narrow, when the movable electrode overruns, the insulating case and the movable electrode may come into contact with each other, damaging the insulating case and causing dielectric breakdown, resulting in an accident such as a ground fault or short circuit. There is.

  Accordingly, an object of the present invention is to provide a switch that solves the above problems.

  In order to solve the above-mentioned problem, the invention according to claim 1 has a movable electrode part that is rotatable in a case, and the vicinity of the rotation support part of the movable electrode part is constituted by two plate-like members. A stopper that is in surface contact with the case-side surface of each plate-like member when the movable electrode portion is rotated to the maximum open position is provided on the case side, and the stopper is formed of an inelastic member. To do.

The invention according to claim 2 is the invention according to claim 1, wherein a regulating member that regulates an open position of the movable electrode portion is provided on the main shaft that rotates the movable electrode portion.
The opening position of the movable electrode portion is regulated by the regulating member before the case-side surface of the plate-shaped member comes into contact with the stopper.

  According to the present invention, since the rotation of the movable electrode portion is regulated by the surface contact between the plate-like member provided on the movable electrode portion and the stopper made of an inelastic member, the movable electrode portion is compared with the conventional switch. The opening position of is stable.

  Further, since the stopper is provided in the vicinity of the rotation support portion of the movable electrode portion, the moving speed of the movable electrode portion with respect to the stopper is slow and the inertial force is small, so that the rotation of the movable electrode portion can be more reliably suppressed.

  According to the second aspect of the present invention, in order to prevent rotation of the movable electrode portion by the stopper after the rotation of the movable electrode portion is prevented by the regulating member provided on the main shaft, an impact applied to the movable electrode portion is applied. It is possible to reduce the damage of the movable electrode part, and the moving speed of the movable electrode part with respect to the stopper is slower and the inertial force is also reduced, so that the rotation of the movable electrode part can be more reliably suppressed.

The best mode for carrying out the present invention will be described with reference to the drawings.
1 to 12 show an embodiment of the present invention.

  1 is a front view of the switch 1, FIG. 2 is a side view of the switch 1, and FIG. 3 is a front sectional view of the switch 1.

  The switch 1 has a metal main body case 2 whose upper surface is open. Inside the main body case 2, as shown in FIG. 5, a unit case 3 divided into three phases is provided in three phases. And fixed to the base plate 30 with screws. The unit case 3 is formed of an insulating resin material, and is formed in a substantially rectangular box shape having an open top surface as shown in FIGS. Examples of the insulating resin material include an unsaturated polyester resin material and an epoxy resin material. In this example, an epoxy resin material mixed with insulating and high strength glass fibers was used. As shown in FIG. 5, a notch 3 a is provided on the lower side surface of the unit case 3.

Inside the unit case 3, a fixed electrode portion 4 and a movable electrode portion 5 are provided.
Further, the side wall portions 3b and 3c of the unit case 3 are provided with through holes 3d and 3e penetrating the front and back, and around the through holes 3d and 3e, a cylindrical projecting wall 6a projecting outward is provided. 6b, 7a and 7b are concentric with the through holes 3d and 3e and are formed in a double shape. Connection conductors 8 and 9 electrically connected to the electrode portions 4 and 5 are inserted and fixed in the through holes 3d and 3e, respectively. The connection conductors 8 and 9 are provided through the wall portions 3b and 3c of the unit case 3, and the connection portions 8a and 9a protruding outward from the unit case 3 have connection portions 10a of bushings 10 and 11 to be described later. 11a are connected.

  The connection conductors 8 and 9 are made of a conductive material, and as shown in FIGS. 3, 6, and 7, contact surfaces 8 b and 9 b with fixed contacts 15 a and 15 b described later, and a wall portion of the unit case 3. The contact surfaces 8c and 9c with 3b and 3c are formed by two parallel planes. Further, as shown in FIGS. 3, 6, and 7, the end portions of the connection conductors 8 and 9 protrude from the end portions of the protruding walls 6 a, 6 b, 7 a, and 7 b toward the main body case 2.

  The connection conductors 8 and 9 may be configured to be electrically connected to the bushings 10 and 11, and the end portions of the connection conductors 8 and 9 are outside the end portions of the protruding walls 6a, 6b, 7a, and 7b. It does not have to protrude in the direction. Moreover, the cross-sectional shape of the protruding walls 6a, 6b, 7a, and 7b is set to a shape having an arbitrary continuous wall such as an ellipse, a square, or a rectangle in addition to a circle.

  In the lower part of the fixed electrode part 4 and the movable electrode part 5 of the unit case 3 and separated from the space where the electrode parts 4 and 5 are provided, as shown in FIG. 12 and 13 are provided. The voltage detectors 12 and 13 are formed by insert-molding a metal terminal when the unit case 3 is molded, or are formed by press-fitting and fixing a metal terminal after the unit case 3 is molded.

  The voltage detection units 12 and 13 are connected to a metal outlet 14 provided at the lower part of the main body case by a lead wire (not shown) connected to the metal terminal. By connecting a checker to the metal outlet 14, the charge state of the switch can be grasped.

  The fixed electrode portion 4 is composed of fixed contacts 15a and 15b, and the end portions of the fixed contacts 15a and 15b on the wall 3b side are contact planes 8b of the connection conductor 8, as shown in FIG. 8b is pinched and fixed by a pin 17 so as not to rotate. The fixed contacts 15a and 15b are formed by bending in the axial direction of the connection conductor 8, and projections 15e and 15f are provided inside the other ends 15c and 15d. A spacer made of an insulating resin (not shown) is fixed between the fixed contacts 15a and 15b with screws in order to suppress chattering when a movable contact 20 described later is inserted. Further, the thickness of the spacer is such that the protrusions 15e and 15f do not contact when the movable contact 20 is not inserted, and the interval between the end portions 15c and 15d is smaller than the thickness of the movable contact 20. Set.

  The center line between the projecting portions 15 e and 15 f is set so as to be on the extension line of the axial center of the connection conductor 8. A coil spring 17a, which is an elastic material, is compressed and wound around the outer periphery of the pin 17.

  The movable electrode portion 5 is composed of a movable contact 20, and the movable contact 20 is formed in an inverted V-shape that is curved as shown in FIGS. 3 and 8. As shown in FIGS. 9A and 9B, the end of the movable contact 20 on the unit case 3 side is formed in a crotch shape with two plate-like members 20a and 20b. The plate-like members 20 a and 20 b are disposed substantially in parallel, sandwich the contact planes 9 b and 9 b of the connection conductor 9, and are supported so as to be rotatable with respect to the pins 21 provided on the connection conductor 9. The other end side of the plate-like member 20a is bent in the axial direction of the connection conductor 9, as shown in FIG.

  The other end 20c of the movable contact 20 is formed so as to be positioned on the axis of the connection conductor 9 when the movable contact 20 is inserted. Further, the side surfaces 20d and 20e on the wall 3c side of the unit case 3 in the plate-like members 20a and 20b are formed in a planar shape.

  In addition, coil springs 22 and 22, which are elastic members constituting the urging means, are disposed in a compressed state on the outer periphery of the pin 21 on the outer side of the plate-like members 20 a and 20 b, and the coil springs 22 and 22 are attached. The plate-like members 20a and 20b hold the connection conductor 9 at a predetermined pressure by the force.

  A stopper 23 is provided between the plate-like members 20 a and 20 b in the movable contact 20 (movable electrode portion 5) and the wall portion 3 c of the unit case 3. As shown in FIGS. 10A to 10C, the stopper 23 is a side plate 23a, 23b and a back plate 23c provided on the wall 3c side (rear side) between the side plates 23a, 23b. The shape is substantially U-shaped. The side plates 23a, 23b and the back plate 23c are formed of an inelastic material such as metal, and the plate thicknesses of the side plates 23a, 23b and the back plate 23c are set to be equal to or thicker than the plate thickness of the plate-like members 20a, 20 Has been. The side plates 23a and 23b are fixed to the contact planes 9b and 9b of the connection conductor 9 in a state of sandwiching them. The bottom side of the back plate 23 c is formed orthogonal to the axis of the connection conductor 9 and is in contact with the connection conductor 9.

  The front surfaces 23d and 23e of the side plates 23a and 23b are inclined in the direction of the wall 3c and are formed in a planar shape. As shown in FIGS. 8 and 9A, the plate-like members 20a and 20b It is arrange | positioned in the position facing the side surfaces 20d and 20e of the wall part 3c. That is, when the movable contact 20 is rotated to the open state as shown by a two-dot chain line in FIGS. 3 and 8, the side surfaces 20d and 20e of the wall portion 3c of the plate-like members 20a and 20b are replaced with the plate-like member 20a, The amount of rotation when the movable contact 20 is fully opened (upward rotation) is regulated by reliably making surface contact with the entire front surfaces 23d and 23e of the side plates 23a and 23b that are equal to or thicker than 20b, The movable contact 20 is regulated so as not to contact the unit case 3, the lid case 45, and the like.

  In addition, although the plate-shaped members 20a and 20b of the movable contact 20 and the side plates 23a and 23b of the stopper 23 are configured by two in this embodiment, they may be configured by a single number or a plurality of three or more.

  Further, a pedestal 24 integrally formed with the connection conductor is provided between the back plate 23c and the wall 3c, the rear portion of the back plate 23c abuts on the pedestal 24, and the back plate 23c is on the wall 3c side. It is designed not to rotate.

  The front surface 20d, 20e of the wall 3c of the plate-like members 20a, 20b, the front surfaces 23d, 23e of the side plates 23a, 23b, the pedestal 24, and the like constitute the third suppression means 25.

  An arc extinguishing chamber 26 is provided in the unit case 3 so as to accommodate the fixed contacts 15a and 15b, and the movable contact 20 can be inserted above the arc extinguishing chamber 26 as shown in FIG. So that it is open. The arc extinguishing chamber 26 is formed of a resin material such as a urea resin material or a polyacetal resin material. The arc extinguishing chamber 26 is fixed to the arc extinguishing chamber mounting bracket 27 fixedly supported by the unit case 3 with screws. On the outer surface of the arc extinguishing chamber 26, an iron material 28 for improving the arc extinguishing performance is provided in the vicinity of the fixed contacts 15a and 15b.

  A main shaft 31 is rotatably provided on the base plate 30 at a portion located in the notch 3 a of the unit case 3. A driving link 32 is formed integrally with the main shaft 31, and a connecting link 33 is rotatably connected to a front portion of the driving link 32, and an end of the connecting link 33 is rotatably connected to the movable contact 20. ing. The main shaft 31 is connected to an operation handle 35 provided on the outer surface of the main body case 2 via a link mechanism (not shown).

  Therefore, when the operation handle 35 is rotated, the main shaft 31 is rotated via the link mechanism, and the movable contact 20 is connected to the connection conductor 9 via the drive link 32 and the connection link 33. By rotating around the center, the other end 20c of the movable contact 20 can be inserted or released between the protrusions 15e and 15f of the fixed contacts 15a and 15b.

  As shown in FIG. 1, restricting portions 36 a and 36 b are provided on the mounting plate 36 c on the outer surface of the main body case 2 so as to restrict the vertical rotation (the amount of input / release) of the operation handle 35. It has become. The restricting portions 36a and 36b are composed of screws and nuts. By rotating the screws forward and backward, the contact portions of the restricting portions 36a and 36b with the operation handle 35 are moved up and down with respect to the mounting plate 36c. The rotation restricting position of the handle 35 can be adjusted. The restricting portions 36 a and 36 b and the operation handle 35 constitute a first restricting means 36.

  As shown in FIGS. 11 and 12, a regulating member 38 for regulating the amount of rotation of the main shaft 31 is provided at one or both ends of the main shaft 31. The restricting portion 38a provided on the restricting member 38 abuts on a restricting portion 39 provided fixed on the upper surface side of the base plate 30 to restrict the amount of rotation when the movable contact 20 is fully opened. The restricting portion 39 has a bolt 39a and a nut 39b. The restricting portion 39 can be moved up and down with respect to the base plate 30 by rotating the bolt 39a in the forward and reverse directions to adjust the rotation restricting position of the main shaft 31. . The bolt 39a is tightened by a nut 39b so as not to be loosened by vibrations caused by the rotation of the main shaft 31.

  After the nut 39b is loosened so as to rise with respect to the base plate 30, the bolt 39a is rotated forward and backward to move to a predetermined height to adjust the rotation restricting position of the main shaft 31, and then the nut 39b is moved by the bolt 39a. The position of the bolt 39a is fixed by tightening in the direction of the base plate 30 so as not to rotate.

The regulating member 38 and the regulating portion 39 constitute a second regulating means.
Before the side surfaces 20d and 20e of the plate-like members 20a and 20b serving as the third restricting means 25 come into surface contact with the front surfaces 23d and 23e of the side plates 23a and 23b, the restricting portion of the main shaft 31 serving as the second restricting means. It is comprised so that 38a may contact | abut to the control part 39. FIG.

  In addition, the operation handle 35 is configured to abut on a regulating portion 36 b that is the first regulating means 36 before the regulating portion 38 a of the main shaft 31 that is the second regulating means 37 abuts on the regulating portion 39. .

  In addition, the amount of rotation of the movable contact 20 of the main shaft 31 in the closing direction is also restricted by the restriction portion 38 b provided inside the restriction member 38 being in contact with the restriction portion 40 provided on the base plate 30. The restricting portion 40 is also configured in the same manner as the restricting portion 39, and is moved up and down with respect to the base plate 30 by rotating the bolt 40a forward and backward to adjust the rotation restricting position in the closing direction of the movable contact 20 of the spindle 31. Can be done.

  After loosening the nut 40b with respect to the base plate 30, the bolt 40a is rotated forward and backward to move to a predetermined height, and the rotation restricting position in the closing direction of the movable contact 20 of the main shaft 31 is adjusted, Thereafter, the nut 40b is tightened in the direction of the base plate 30 so that the bolt 40a does not rotate, and the position of the bolt 40a is fixed.

  A lid case 45 formed of an insulating resin material is placed on top of each unit case 3. As the insulating resin material, the same material as the insulating resin material forming the unit case 3 can be used, and in this embodiment, an epoxy resin material mixed with insulating and high strength glass fibers. It was used. The lid case 45 has a substantially box shape opened to the lower side, is fixedly held to the unit case 3, and insulation between the three phases is secured by the lid case 45 and the unit case 3.

A main body case lid 46 is provided on the upper portion of the main body case 2.
The lid case 45 is not provided for each unit case 3, but the three lid cases 45 may be integrally formed. Further, the lid case 45 may be fixedly held inside the main body case lid 46 with the opening surface thereof facing downward.

  The main body case 2 and the main body case lid 46 constitute an outer case 47, and the unit case 3 and the lid case 47 constitute an insulating case 48.

  On both side surfaces of the main body case 2, bushing mounting holes 50 are provided at positions facing the protruding walls 6 a, 6 b, 7 a, 7 b of the unit case 3. An electrode cover 51 having a cylindrical portion 51a made of an insulating synthetic resin rubber or the like having a substantially cylindrical shape is provided inwardly from the mounting hole 50, and is spaced apart from the outer protruding walls 6b and 7b. It is provided to cover. The electrode cover 50 has a protruding portion 51 b extending radially outward from the cylindrical portion 51 a, and the protruding portion 51 b is disposed between the bushings 10 and 11 and the unit case 3.

  Bushings 10 and 11 are provided through the bushing mounting hole 50, and the bushings 10 and 11 have conductors 10b and 11b and cylindrical portions 10c and 11c. The conductors 10b and 11b are formed of a copper material that is provided at the center of the bushings 10 and 11 and is connected to the electric wires of the distribution line. Other than that, it is made of porcelain or an insulating resin material. The cylindrical portions 10c and 11c are provided on the outer peripheral portion of the conductors 10b and 11b on the unit case 3 side.

  The bushings 10 and 11 are provided with an elastic member 52 such as packing on the inside, a flange 54 on the outside, and a screw 53a fixed to the main body case 2 with a nut 53b tightened from the outside of the flange 54. 10 and 11 are fixed. The conductors 10b and 11b are fixed to the bushings 10 and 11 with nuts through an elastic member such as packing (not shown), or are integrally formed with the bushings 10 and 11.

The elastic member 52 keeps the inside of the switch 1 in an airtight state.
Connection portions 10a and 11a for electrical connection with the fixed electrode portion 4 and the movable electrode portion 5 are provided at the ends of the conductors 10b and 11b, which are insert-molded in the center portion, on the unit case 3 side. Yes.

  The tip of the conductors 10b and 11b on the side of the unit case 3 is formed into a hollow pipe shape, which is divided into four in the axial direction, and a convex portion that protrudes in the axial direction is provided at the circumference of the tip. Thus, the connecting portions 10a and 11a are formed. Ended reinforcing rings 53 and 53 having a C-shaped cross section and an inner diameter slightly smaller than the outer diameter of the distal end portions of the conductors 10 and 11 are mounted on the outer sides of the connection portions 10a and 11a. By connecting the connecting portions 10a and 11a of the bushings 10 and 11 to the connecting portions 8a and 9a of the connecting conductors 8 and 9 by press-fitting and connecting them, 9 is electrically connected.

  It should be noted that the shape of the reinforcing ring 53 and the number of divisions of the connecting portions 10a and 11a ensure a predetermined value for the contact pressure between the connecting portions 10a and 11a and the connecting portions 8a and 9a (tip portions) of the connecting conductors 8 and 9. What is necessary is just to be able to set arbitrarily besides the said shape.

  As shown in FIG. 3, the ends of the cylindrical portions 10c, 11c of the bushings 10, 11 are arranged so as to be positioned between the double projecting walls 6a, 6b, 7a, 7b provided in the unit case 3. It is installed. A cylindrical portion 51a of the electrode cover 51 is disposed outside the protruding walls 6b and 7b. Therefore, a quadruple wall exists in the outer direction of the connecting conductors 8 and 9.

  The cylindrical portions 10c and 11c of the bushings 10 and 11 are not in contact with the wall portion 3b and the protruding walls 6a, 6b, 7a and 7b of the unit case 3, as shown in FIGS. The protruding walls 6a, 6b, 7a and 7b are not in contact with the electrode cover 51 and the cylindrical portions 10c and 11c. Accordingly, a meandering complex and long-distance spatial path exists between the connecting portions 10a and 11b (charging portions) of the conductors 10b and 11b and the outside of the cylindrical portion 51a of the electrode cover 51.

  With the space path, the space insulation distance from the charging units 10a and 11b to the main body case can be extended. That is, the charging portions 10a and 11b pass through the spaces between the protruding walls 6a and 7a and the cylindrical portions 10c and 11c, and then pass through the spaces between the cylindrical portions 10c and 11c and the protruding walls 6a and 7a, and further, the protruding walls 6a, The insulation performance is improved by reaching the main body case 2 through the space between 7a and the cylindrical portions 51a and 51a and increasing the insulation distance.

  In addition, the projecting wall provided in the unit case 3 may be provided in plural or in a single layer such as triple in addition to double, and the cylindrical portions 10c and 11c of the bushings 10 and 11 have two in addition to single. A plurality of weights may be provided and set arbitrarily.

Next, the assembly procedure of the switch 1 will be described.
First, as shown in FIG. 11, the main shaft 31 is rotatably attached to a mounting portion 30a provided on the base plate 30 via a bearing (not shown). Further, the fixed electrode portion 4 and the movable electrode portion 5 are electrically connected to the connection conductors 8 and 9 provided in the three unit cases 3, and other predetermined parts are attached.

  Next, each unit case 3 is arranged above the main shaft 31 so that the notch 3a of each unit case 3 is located, each unit case 3 is fixed on the base plate 30 with screws, and both ends of the connecting rod 33 are fixed. The portion is rotatably connected to the drive link 32 provided on the main shaft 31 and the movable contact 20 of the movable electrode portion 5. Thereby, the main shaft 31 and the movable contact 20 are connected via the connecting rod 33 or the like.

  Next, the base plate 30 to which the unit case 3 is assembled is fixed inside the main body case 2. Next, each unit case cover 45 is fixed to the upper part of each unit case 3, and further, the main body case cover 47 is fixed to the main body case 2 from the upper part while ensuring airtightness.

  Next, the bushings 10 and 11 are inserted into the bushing mounting holes 50 and 50 provided on both side surfaces of the main body case 2, and the connection portions 10 a and 11 a of the bushings 10 and 11 are fitted to the end portions of the connection conductors 8 and 9. The bushings 10 and 11 are fixed to the main body case 2 with screws. A packing is disposed between the main body case 2 and the bushing, and a flange is disposed between the screw and the bushings 10 and 11 and fixed.

  Thereby, the connection conductors 8 and 9 and the conductors 10b and 11b in the bushings 10 and 11 are electrically connected via the connection portions 10a and 11a. That is, each conductor 10b, 11b, the fixed electrode part 4, and the movable electrode part 5 are electrically connected.

Thereafter, the operation handle 35 and the like are assembled to the main shaft 31 to form the switch 1.
In the assembly, each unit case 3 may be assembled after the base plate 30 to which the main shaft 31 is assembled is fixed inside the main body case 2.

Since the present invention has the structure described above, the following actions and effects are achieved.
Conventionally, as a voltage detection method, a voltage detection unit is provided on the lower surface side of the bushing portion exposed from the main body case, and an operator determines a charging state by connecting a checker to the voltage detection unit on the power source side and the load side. When the bushing is wet or in the rain, there is a problem that accurate voltage detection cannot be performed because the resistance value of the voltage detector is not stable.

  However, by providing the voltage detectors 12 and 13 in the unit case 3 inside the main body case 2 as in the present embodiment, the voltage detectors 12 and 13 are inside the switch 1 that is maintained in an airtight state. In addition, regardless of the state of the bushings 10 and 11, the resistance values of the voltage detection units 12 and 13 are stabilized, and an accurate voltage detection operation can be performed.

  Further, since the coil springs 17a of the fixed contacts 15a and 15b are provided, when the movable contact 20 is inserted between the fixed contacts 15a and 15b, the movable contact 20 and the fixed contacts 15a and 15b It is possible to generate a pressure necessary for energization on both the contact surface and the contact surfaces of the stationary contacts 15 a and 15 b and the connection conductor 8.

  Further, when the bushings 10 and 11 are damaged and the bushings 10 and 11 are replaced, only the bushings 10 and 11 to be replaced are removed from the main body case 2 without opening the outer case as in the prior art. It is possible to exchange. For this reason, the replacement work of the bushings 10 and 11 can be easily performed in a short time.

  Moreover, also in the recycling work of the switch 1, the switch 1 can be easily disassembled and the parts can be replaced, and the recycling work can be easily performed.

  As described above, as a problem when the bushings 10 and 11 are configured to be removable from the main body case 2, electrical connection between the movable electrode portion 4 and the fixed electrode portion 5 (connection conductors 8 and 9) and the bushings 10 and 11 is possible. Ensuring insulation in the general connection portions 8a, 9a, 10a, and 11a is a major issue.

  However, according to the present invention, a protruding wall is provided around the connection conductors 8 and 9 electrically connected to the fixed electrode portion 4 and the movable electrode portion 5, respectively, and the connection portions 8a, 9a, 10a, and 11a are provided. Only by fixing the bushings 10 and 11 to the main body case 2 so that a spatial path to the outside of the protruding walls 6a and 7a (cylindrical portions 51a and 51a) is formed, the connecting portions 8a, 9a, 10a, The space insulation distance between the ground in 11a can be ensured long, and sufficient insulation can be ensured.

  Further, the rear portion of the back plate 23c of the stopper 23 constituting the third restricting means 25 is in contact with the pedestal 24, and the back plate 23c is prevented from rotating toward the wall portion 3c. Further, the side surfaces 20d and 20e of the wall portions 3c of the plate-like members 20a and 20b of the movable contact 20 come into surface contact with the front surfaces 23d and 23e of the side plates 23a and 23b of the stopper 23 made of an inelastic material, so that the stopper 23 and Since the contact area with the movable contact 20 can be increased and the stop can be surely stopped at the maximum open position, overrun in the opening operation can be suppressed, and the movable contact 20 contacts the unit case 3, the lid case 45, etc. Suppresses damage.

  Further, since the stopper 23 is provided in the vicinity of the rotation fulcrum 21 of the movable contact 20, the moving speed of the movable contact 20 with respect to the stopper 23 is slow and the inertial force is small, so that the movable contact 20 is rotated. It can suppress more reliably.

  Further, when the movable contact 20 is fully opened, the operation handle 35 is first brought into contact with the restricting portion 36b which is the first restricting means 36, thereby preventing the movable contact 20 from rotating. If the stop still does not stop, the restricting portion 38a of the restricting member 38 provided on the main shaft 31 as the second restricting means 37 contacts the restricting portion 39 provided on the base plate 30 to rotate the movable contact 20. To prevent. If it still does not stop, the wall 3c side surfaces 20d and 20e of the plate-like members 20a and 20b, which are the third restricting means 25, come into surface contact with the front surfaces 23d and 23e of the side plates 23a and 23b, so that the movable contact 20 The rotation of the is prevented.

  As described above, since the rotation of the movable contact 20 is prevented by the first and second regulating means 36 and 37 before the movable contact 20 contacts the stopper 23, the impact applied to the movable contact 20 from the stopper 23. And the damage of the movable contact 20 can be suppressed.

  In addition, since the movable contact 20 and the stopper 23 come into surface contact after the first and second restricting means 36 and 37 prevent the rotation of the movable contact 20, the moving speed of the movable contact 20 is slower. Thus, since the inertial force becomes smaller, the rotation of the movable contact 20 can be more reliably suppressed.

  In addition to the above-described embodiment, the present invention is for opening and closing electric circuits such as a high-voltage distribution line such as a multi-circuit switch in which a plurality of opening and closing parts are housed in one case used for an underground distribution line. Applicable to all equipment used.

The front view of the switch of this invention. The side view of the switch of this invention. Front sectional drawing of the state which removed one bushing from the switch of this invention. The top view of the state which removed the main body case cover, the cover case, and the operation handle from the switch of this invention. The front view of the unit case used for the switch of this invention. The fragmentary sectional view of the enlarged top view of the bushing part of the switch of this invention. FIG. 7 is a horizontal partial cross-sectional view of FIG. 6. The front view of the state which attached the movable contact of this invention, the stopper, and the connection conductor to the switch. (A) is the side view of FIG. 8, (b) is the figure which removed the stopper from the state of (a). The stopper used for the switch of this invention, (a) is a front view, (b) is a side view, (c) is a rear view. The top view which shows the relationship between the base plate used for the switch of this invention, and a main axis | shaft. The axial direction expanded sectional view which shows the 2nd control means in the switch of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switch 4 Movable electrode part 23 Stopper 23a, 23b Plate member 38 Control part agent provided in the main axis 47 Outer case 48 Insulation case

Claims (2)

  A movable electrode portion that is rotatable in the case, and the vicinity of the rotation support portion of the movable electrode portion is composed of two plate-like members, and when the movable electrode portion is rotated to the maximum open position, A movable electrode portion stopper structure for a switch, characterized in that a stopper in surface contact with the surface on the case side of the plate-like member is provided on the case side, and the stopper is formed of an inelastic member. A main shaft that rotates the movable electrode part is provided with a regulating member that regulates an open position of the movable electrode part,
The movable electrode of a switch according to claim 1, wherein the opening position of the movable electrode portion is regulated by the regulating member before the case-side surface of the plate-like member comes into contact with the stopper. Stopper structure.

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