WO2019171500A1 - Draw-out type circuit breaker - Google Patents

Abstract

Provided is a draw-out circuit breaker including a terminal device and a shutter device. The terminal device has a plurality of insulating bases (21) into which a plurality of draw-out frame-side conductors is inserted. The shutter device has a plurality of fixed shutters. The plurality of insulating bases (21) are arranged in a second direction which is orthogonal to a first direction in which the breaker body is pulled out. In each of the plurality of insulating bases (21), each of a pair of wall portions (213, 214) facing each other in the second direction has engaging portions (213f, 214f) engaged with the fixed shutters. Each of the engaging portions (213f, 214f) has a first extending portion (213f1, 214f1) extending in the first direction and a second extending portion (213f2, 214f2) extending from the tip of the first extending portion (213f1, 214f1) in the second direction. One second extending portion (213f2) and the other second extending portion (214f2) of the pair of wall portions (213, 214) extend away from each other.

Description

Pull-out type circuit breaker

The present invention relates to a drawer type circuit breaker in which a breaker body is housed in a drawer frame in which a terminal device is disposed.

Conventionally, a drawer type circuit breaker equipped with a shutter device is known. A drawer type circuit breaker including a shutter device includes a drawer frame, a terminal device disposed on the drawer frame, a circuit breaker body that can be pulled out from the drawer frame, and a shutter device attached to the front surface of the terminal device. ing.

The terminal device has, for each phase, a plurality of lead frame side conductors connected to the power source side conductor and the load side conductor and an insulating base into which the plurality of lead frame side conductors are inserted. Moreover, the circuit breaker body has a plurality of circuit breaker side conductors connected to the plurality of drawer frame side conductors in a state of being housed in the drawer frame. The shutter device has a function of covering the drawer frame side conductor to prevent the drawer frame side conductor from being exposed when viewed from the circuit breaker body side when the circuit breaker body is pulled out from the drawer frame. Yes.

For example, in Patent Document 1, a fixed shutter having an opening in which a breaker-side conductor protruding from a breaker body can be inserted and moved to a position that covers the opening of the fixed shutter by a drive mechanism when the breaker body is pulled out A shutter device including a movable shutter is disclosed. Such a pull-out type circuit breaker is configured by combining a half body with a symmetrical left and right insulating base provided for each phase, and a fixed shutter is inserted into a guide groove provided in two halves facing each other. By doing so, the fixed shutter can be easily attached to the insulating base.

JP-A-6-22418

However, when the insulating base provided for each phase is integrally formed by molding, there is a problem that it is difficult to provide the insulating base with a guide groove into which a fixed shutter can be inserted. Therefore, in the conventional drawer type circuit breaker, the terminal unit may not be easily assembled or maintained.

The present invention has been made in view of the above, and an object of the present invention is to provide a drawer type circuit breaker that can easily attach a fixed shutter to an insulating base even when the insulating base is integrally formed. .

In order to solve the above-described problems and achieve the object, the drawer type circuit breaker of the present invention includes a drawer frame, a terminal device, a circuit breaker body, and a shutter device. The terminal device has a plurality of terminal units including a plurality of lead frame side conductors connected to the power supply side conductor and the load side conductor, and an insulating base into which the plurality of lead frame side conductors are inserted, and is arranged in the lead frame. Established. The circuit breaker body has a plurality of circuit breaker side conductors connected to the plurality of drawer frame side conductors in a state of being housed in the drawer frame, and can be pulled out from the drawer frame. The shutter device includes a plurality of fixed shutters having a plurality of openings into which a plurality of circuit breaker-side conductors are inserted when the circuit breaker body is housed in the drawer frame, and a plurality of shutter devices when the circuit breaker body is pulled out from the drawer frame. And a movable shutter for closing the opening. The plurality of insulating bases are arranged in a second direction that is a direction orthogonal to the first direction in which the breaker body is drawn out. Each of the plurality of insulating bases has a pair of wall portions facing each other in the second direction. Each of the pair of wall portions has an engaging portion that engages with the fixed shutter. Each of the engaging portions includes a first extending portion that extends in the first direction, and a second extending portion that extends in the second direction from the tip of the first extending portion. One second extending portion and the other second extending portion of the pair of wall portions extend in a direction away from each other.

According to the present invention, even when the insulating base is integrally formed, there is an effect that the fixed shutter can be easily attached to the insulating base.

External view of the drawer type circuit breaker according to the first embodiment of the present invention. External drawing which shows the state by which the circuit breaker main body was pulled out from the inside of the drawer frame in the drawer type circuit breaker concerning Embodiment 1. FIG. The rear view which shows a mode that the several terminal unit which comprises the terminal device concerning Embodiment 1 is arrange | positioned in a drawer | drawing-out frame. The disassembled perspective view of the terminal unit concerning Embodiment 1. FIG. The top view which shows the structural example of the drawer | drawer-frame side conductor concerning Embodiment 1. FIG. External appearance perspective view which shows a mode that a shutter apparatus is attached to the terminal device concerning Embodiment 1. FIG. FIG. 3 is an external perspective view showing a state in which the shutter device is attached to the terminal device according to the first embodiment. FIG. 3 is a diagram illustrating a configuration example of a movable shutter according to the first embodiment. FIG. 5 is an external perspective view showing an example of a shutter drive unit according to the first embodiment. 1 is an exploded perspective view of a shutter drive unit according to Embodiment 1. FIG. FIG. 6 is a bottom view showing another example of the shutter drive unit according to the first embodiment. FIG. 11 is an external perspective view of a rod of the shutter drive unit shown in FIG. FIG. 11 is a plan view of the shutter drive unit with the rod and link attached to the unit base shown in FIG. FIG. 11 is a plan view of the shutter drive unit with the rod and link attached to the unit base shown in FIG. Sectional view along line XV-XV shown in FIG. The partial cross section figure of the drawer-type circuit breaker of the state in which the circuit breaker main body concerning Embodiment 1 was accommodated in the drawer frame The partial cross section figure of the drawer-type circuit breaker of the state by which the circuit breaker main body concerning Embodiment 1 was pulled out from the inside of a drawer frame 1 is a front view showing an example of an insulating base according to a first embodiment; 1 is an external perspective view showing an example of an insulating base according to a first embodiment. FIG. 3 is a diagram illustrating a configuration example of a first fixed shutter according to the first embodiment. FIG. 3 is a diagram illustrating a configuration example of a second fixed shutter according to the first embodiment. The figure which shows a mode that the shutter drive unit was attached to the insulation base concerning Embodiment 1. FIG. The figure which shows a mode that a movable shutter part is attached to the insulation base concerning Embodiment 1. FIG. The figure which shows a mode that the 1st fixed shutter is attached to the insulation base concerning Embodiment 1. FIG. The figure which shows a mode that the 2nd fixed shutter is attached to the insulation base concerning Embodiment 1. FIG. The front view of the terminal device with which the shutter device concerning Embodiment 1 was equipped. Sectional view along the line XXII-XXII shown in FIG. External appearance perspective view which shows the other example of the insulation base concerning Embodiment 1. FIG. Front view showing another example of the fixed shutter portion according to the first embodiment. The front view which shows the state which attached the fixed shutter part shown in FIG. 29 to the insulation base shown in FIG. The front view of the terminal device concerning Embodiment 2. External appearance perspective view which shows a mode that a shutter apparatus is attached to the terminal device concerning Embodiment 2. FIG. External perspective view of a third fixed shutter according to the second embodiment External appearance perspective view of the auxiliary panel concerning Embodiment 2. FIG.

Hereinafter, a drawer type circuit breaker according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
1 is an external view of a drawer type circuit breaker according to a first embodiment of the present invention, and FIG. 2 is a state in which the circuit breaker body is pulled out from the inside of the drawer frame in the drawer type circuit breaker according to the first embodiment. FIG. In the drawings including FIG. 1 and FIG. 2, for easy understanding, the Z-axis whose vertical upward direction is the positive direction and the forward direction of the drawer type circuit breaker 100 according to the first embodiment are defined as X. A three-dimensional orthogonal coordinate system including an axis and a Y axis with the right direction of the drawer type circuit breaker 100 as a positive direction is illustrated.

As shown in FIG. 1, a drawer type circuit breaker 100 according to a first embodiment includes a circuit breaker body 1 that opens and closes an electric circuit of a three-phase circuit, a terminal device 2 that is connected to the circuit breaker body 1, and a terminal device. 2 and a drawer frame 3 that accommodates the circuit breaker main body 1 so that it can be pulled out. Further, as shown in FIG. 2, the drawer type circuit breaker 100 includes a drawer rail 4 that connects the circuit breaker body 1 and the drawer frame 3. With this drawer rail 4, the breaker body 1 can be pulled out from the inside of the drawer frame 3. Note that the drawer-type circuit breaker 100 is housed in a casing of a closed switchboard (not shown) so that the circuit breaker body 1 can be pulled out.

The circuit breaker body 1 has a well-known configuration for opening and closing the electric circuit of the three-phase circuit. The opening operation is an operation for cutting off the R-phase, S-phase, and T-phase electric circuits in the three-phase circuit, and the closing operation is for the R-phase, S-phase, and T-phase electric circuits in the three-phase circuit. It is an operation to connect.

The circuit breaker body 1 includes a housing 10 including a fixed contact, a movable contact, an opening / closing mechanism, and a tripping mechanism (not shown), and circuit breaker-side conductors 11-1, 11-2 projecting rearward of the housing 10. 11-3, 12-1, 12-2, 12-3. The fixed contact and the movable contact are provided for each phase. Each of the breaker-side conductors 11-1, 11-2, and 11-3 is referred to as a breaker-side conductor 11 without being individually distinguished, and the breaker-side conductors 12-1, 12-2, 12-3. May be described as the breaker-side conductor 12 without being individually distinguished.

An operation button (not shown) is provided on the front surface portion 10a of the housing 10, and when the operation button is operated, the movable contact is brought into contact with the fixed contact in units of phases and the movable contact is made in units of phases. An opening operation that deviates from the fixed contact is performed. When the movable contact contacts the fixed contact in phase units, the circuit circuit of the three-phase circuit is connected and the circuit breaker body 1 is energized. Moreover, when the movable contact deviates from the fixed contact in units of phases, the electric circuit of the three-phase circuit is interrupted, and the circuit breaker body 1 enters a non-energized state. In addition, the tripping mechanism provided in the housing 10 is configured to automatically disconnect the movable contact from the fixed contact in units of phases and shut off the electric circuit of the three-phase circuit when an overcurrent flows in the three-phase circuit. have.

The breaker-side conductor 11 is a conductor that is connected to a fixed contact provided in the housing 10 and is electrically connected to a power-side conductor (not shown) via the terminal device 2. The breaker-side conductor 12 is a conductor that is connected to a movable contact provided in the housing 10 and is electrically connected to a load-side conductor (not shown) via the terminal device 2. The breaker-side conductors 11-1 and 12-1 are conductors that form an R-phase electric circuit, and the breaker-side conductors 11-2 and 12-2 are conductors that form an S-phase electric circuit. The side conductors 11-3 and 12-3 are conductors that form a T-phase electric circuit. In the example shown in FIG. 2, the breaker-side conductor 11 is located above the breaker-side conductor 12, but the breaker-side conductor 11 may be located below the breaker-side conductor 12. Good.

The terminal device 2 includes a plurality of insulating bases 21 and lead frame side conductors 22-1, 22-2, 22-3, 23-1, 23, which are housed in the plurality of insulating bases 21 so as to protrude rearward. 2, 23-3. The lead frame side conductors 22-1 and 23-1 are conductors forming an R-phase electric circuit, and the lead frame side conductors 22-2 and 23-2 are conductors forming an S-phase electric circuit. The side conductors 22-3 and 23-3 are conductors that form a T-phase electric circuit. When each of the lead frame side conductors 22-1, 22-2, 22-3 is shown without being individually distinguished, it is referred to as a lead frame side conductor 22, and the lead frame side conductors 23-1, 23-2, When each of 23-3 is shown without being individually distinguished, it is referred to as a lead frame side conductor 23.

One end of the lead frame side conductor 22 protruding from the insulating base 21 is connected to a power source side conductor (not shown), and when the breaker body 1 is housed in the lead frame 3, the other end is the breaker side conductor 11. Connected to. The drawer frame side conductor 23 has one end projecting from the insulating base 21 connected to a load side conductor (not shown), and when the breaker body 1 is housed in the drawer frame 3, the other end is the circuit breaker side. Connected to the conductor 12. The power supply-side conductor is a conductor that connects the power supply device and the drawer type circuit breaker 100. The load-side conductor is a conductor that connects the load to which power is supplied from the power supply device and the drawer-type circuit breaker 100. The load is, for example, an electric device that operates with electric power from a power supply device. The configuration of the terminal device 2 will be described in detail later.

The drawer frame 3 includes left and right side plates 31 and 32. As shown in FIG. 1, the circuit breaker body 1 is housed in a drawer frame 3, which is an area surrounded by the left and right side plates 31 and 32, so that it can be pulled out. The terminal device 2 is detachably disposed in the drawer frame 3. In the example shown in FIG. 1, the circuit breaker body 1 is housed in the drawer frame 3 with the front surface portion 10 a of the circuit breaker body 1 exposed, and the terminal device 2 is disposed in the drawer frame 3. The extraction frame side conductors 22 and 23 protrude rearward. The drawer frame 3 is not limited to the configuration shown in FIGS. 1 and 2, and the storage position of the circuit breaker body 1 in the drawer frame 3 and the arrangement position of the terminal device 2 in the drawer frame 3 are also included. It is not limited to the example shown in FIG. 1 and FIG.

The pull-out rail 4 is a pull-out rail that connects the breaker body 1 and the pull-out frame 3 so that the breaker main body 1 can be pulled out from within the pull-out frame 3. The plurality of rail members 41 and 42 are connected to each other. The drawer rail 4 may be configured to connect the circuit breaker body 1 and the drawer frame 3 so that the circuit breaker body 1 can be pulled out from the inside of the drawer frame 3, and is not limited to the configuration illustrated in FIG. Instead of the drawer rail 4, one or more members that connect the circuit breaker body 1 and the drawer frame 3 may be provided in the drawer type circuit breaker 100 so that the circuit breaker body 1 can be pulled out from the inside of the drawer frame 3.

The circuit breaker body 1 includes, for example, a drawing handle and a drawing mechanism (not shown), and the drawing rail 4 can be extended and contracted in the front-rear direction by the drawing mechanism by rotating the drawing handle by engaging the drawing handle. it can. The circuit breaker main body 1 is pulled out from the inside of the drawer | drawer frame 3 because the drawer rail 4 is extended in the front-back direction. Further, the circuit breaker body 1 is accommodated in the drawer frame 3 by contracting the drawer rail 4 in the front-rear direction, the circuit breaker side conductors 11 and 12 of the circuit breaker body 1 and the drawer frame side conductors 22 and 23 of the terminal device 2. Is connected.

Next, a specific configuration of the terminal device 2 will be described. FIG. 3 is a rear view showing a state in which a plurality of terminal units constituting the terminal device according to the first embodiment are arranged in the drawer frame. As shown in FIG. 3, the terminal device 2 includes three terminal units 20-1, 20-2, and 20-3.

The example shown in FIG. 3 shows a state where the terminal units 20-1, 20-2, 20-3 are arranged in the drawer frame 3. The bidirectional arrows shown in FIG. 3 indicate the moving directions of the terminal units 20-1 and 20-2. The terminal units 20-1, 20-2, 20-3 can be arranged in the drawer frame 3 by moving from above the drawer frame 3 to below, and can be moved from the drawer frame 3 by moving upward. It can be removed.

The lower end portions of the terminal units 20-1, 20-2, 20-3 are inserted into openings (not shown) of the holding plate 33 constituting the drawer frame 3 and are held by the holding plate 33. Further, the upper ends of the terminal units 20-1, 20-2, 20-3 are inserted into openings (not shown) of the holding plate 34 constituting the drawer frame 3 and held by the holding plate 34, as shown in FIG. Is done. Thereby, the terminal device 2 is fixed to the drawer frame 3. The holding plates 33 and 34 are fixed to the side plates 31 and 32, and the terminal units 20-1, 20-2 and 20-3 are removed from the drawer frame 3 by removing the holding plate 33 from the side plates 31 and 32. be able to. As described above, the terminal device 2 is detachably disposed in the drawer frame 3.

The terminal unit 20-1 includes lead frame side conductors 22-1, 23-1. The terminal unit 20-2 includes lead frame side conductors 22-2 and 23-2. The terminal unit 20-3 includes lead frame side conductors 22-3 and 23-3. The terminal units 20-1, 20-2, and 20-3 have the same configuration. When each of the terminal units 20-1, 20-2, and 20-3 is shown without being individually distinguished, it is referred to as a terminal unit 20.

FIG. 4 is an exploded perspective view of the terminal unit according to the first embodiment, and FIG. 5 is a plan view showing a configuration example of the lead frame side conductor according to the first embodiment. As shown in FIG. 4, the terminal unit 20 includes an insulating base 21 and lead frame side conductors 22 and 23. The insulating base 21 includes a terminal storage portion 215 into which the lead frame side conductor 22 is inserted, a terminal storage portion 216 into which the lead frame side conductor 23 is inserted, and two shutter drive units 53 to be described later. A unit storage portion 217.

The lead frame side conductor 22 includes a terminal conductor 221, a relay terminal conductor 222, and a connector 223. The lead frame side conductor 23 includes a terminal conductor 231, a relay terminal conductor 232, and a connector 233. Since the lead frame side conductors 22 and 23 have the same configuration, the configuration of the lead frame side conductor 22 will be described below as an example.

The terminal conductor 221 of the lead frame side conductor 22 is disposed in parallel with the bottom 221a extending along the ZY plane that is the first vertical plane and the XY plane that extends rearward from the bottom 221a and that is the horizontal plane. Terminal portion 221b. A power supply side conductor (not shown) is connected to the terminal portion 221 b of the terminal conductor 221. A load-side conductor (not shown) is connected to the terminal portion of the terminal conductor 231. In the example illustrated in FIG. 4, the bottom portion 221a has a square shape having the same length of the four sides when viewed from the front, and is formed in a rectangular parallelepiped shape. In addition, the terminal portion 221b is formed in a shape that extends rearward perpendicularly to the bottom portion 221a from an intermediate portion of a region sandwiched by sides facing each other in the vertical direction of the bottom portion 221a. The bottom surface of the bottom portion 221a is a flat surface. In addition, although the terminal part 221b is formed in T shape by side view, it is not limited to the shape shown in FIG.

The relay terminal conductor 222 has a bottom 222a extending along the XY plane that is the first vertical plane, and an XZ plane that is the second vertical plane orthogonal to the first vertical plane from the bottom 222a to the front. And a tip end portion 222b formed in a Y shape in plan view. The relay terminal conductor 222 is inserted into the terminal storage portion 215, and the bottom portion 222 a of the relay terminal conductor 222 is fixed by a plurality of screws 25. The screw 25 is attached to the relay terminal conductor 222 through a screw hole 219 provided in the insulating base 21.

As shown in FIG. 5, the bottom portion 222 a of the relay terminal conductor 222 is connected to the bottom portion 221 a of the terminal conductor 221 by a plurality of bolts 24. Thereby, the relay terminal conductor 222 and the terminal conductor 221 are electrically connected. In the example shown in FIGS. 4 and 5, the relay terminal conductor 222 and the terminal conductor 221 are fixed by four bolts 24, but the number of bolts 24 is not limited to four. Further, the relay terminal conductor 222 and the terminal conductor 221 may be fixed by a fastener other than the bolt 24.

As shown in FIG. 5, the connector 223 of the lead frame side conductor 22 is connected to the relay terminal conductor 222. The connector 223 is connected to the circuit breaker-side conductor 11 of the circuit breaker body 1 in a state where the circuit breaker body 1 is housed in the drawer frame 3. The connector 223 includes a groove 223 a that engages with the relay terminal conductor 222 and a groove 223 b that engages with the breaker-side conductor 11.

The connection between the connector 223 and the relay terminal conductor 222 is performed by inserting the end 222b of the relay terminal conductor 222 into the groove 223a of the connector 223. The member constituting the groove part 223a and the member constituting the tip part 222b have elasticity, and when the tip part 222b engages with the groove part 223a, the outer surface of the tip part 222b and the inner wall surface of the groove part 223a are pressed against each other. . Therefore, the engagement between the tip portion 222b and the groove portion 223a can be strengthened, and the relay terminal conductor 222 and the connector 223 can be disconnected when the circuit breaker side conductor 11 is pulled out from the lead frame side conductor 22. Can be prevented. As described above, the engagement between the distal end portion 222b and the groove portion 223a also serves as a stopper.

The connection between the connector 223 and the breaker-side conductor 11 is performed by inserting the tip of the breaker-side conductor 11 into the groove 223b of the connector 223. When the distal end portion of the breaker-side conductor 11 is inserted into the groove portion 223b of the connector 223, the connector 223 can swing. An engagement portion between the tip end portion 222b and the groove portion 223a serves as a fulcrum for the swinging operation of the connector 223. The connector 223 may be configured not to perform a swinging operation. Further, the relay terminal conductor 222 and the terminal conductor 221 may be configured by integral molding, and the terminal conductor 221, the relay terminal conductor 222, and the connector 223 may be configured by integral molding.

Next, the shutter device 5 attached to the terminal unit 20 will be described. FIG. 6 is an external perspective view showing a state where the shutter device is attached to the terminal device according to the first embodiment, and FIG. 7 is an external perspective view showing a state where the shutter device is attached to the terminal device according to the first embodiment. It is.

As shown in FIGS. 6 and 7, the shutter device 5 includes a fixed shutter portion 51 that covers the front surface of the terminal device 2, a movable shutter portion 52 that is disposed between the fixed shutter portion 51 and the terminal device 2, and Two shutter drive units 53 are provided. The fixed shutter unit 51 includes a first fixed shutter 511 and two second fixed shutters 512. The movable shutter unit 52 includes two movable shutters 521. Of the two movable shutters 521, the upper movable shutter 521 is a power-source movable shutter, and the lower movable shutter 521 is a load-side movable shutter.

The shutter drive unit 53 is inserted into a unit storage portion 217 formed on the insulating base 21 shown in FIG. After the shutter drive unit 53 is inserted into the unit storage portion 217, the two movable shutters 521 are attached to the insulating base 21 of the terminal units 20-1, 20-2, 20-3. Thereafter, the fixed shutter 51 is attached to the insulating base 21 of the terminal units 20-1, 20-2, 20-3. The first fixed shutter 511 is disposed at a position facing the terminal unit 20-2. One of the two second fixed shutters 512 is disposed at a position facing the terminal unit 20-1, and the other is disposed at a position facing the terminal unit 20-3.

First, the configuration of the movable shutter 521, the configuration of the shutter drive unit 53, and the relationship between the movable shutter 521 and the shutter drive unit 53 will be described. FIG. 8 is a diagram illustrating a configuration example of the movable shutter according to the first embodiment.

As shown in FIG. 8, the movable shutter 521 includes a closing plate portion 521a, 521b, 521c, a connecting portion 521d for connecting one end portions of the closing plate portions 521a, 521b, 521c, and a closing plate portion 521a, 521b, 521c. A connecting portion 521e that connects the other end portions of the two and a convex portion 521f that protrudes outward from the connecting portion 521e. An opening 521g is formed in the convex portion 521f.

The movable shutter 521 is slidably attached to the insulating base 21. As shown in FIG. 6, sliding surfaces 211 a and 212 a are formed on each insulating base 21. Each movable shutter 521 is slidably attached to the sliding surface 211a or the sliding surface 212a. Each movable shutter 521 can selectively move to the closed position and the open position by sliding the sliding surface 211a or the sliding surface 212a in the left-right direction.

The closed position is a position where the closed plate portions 521a, 521b, and 521c close the openings 511a and 512a or the openings 511b and 512b of the fixed shutter portion 51. Moreover, the open position is a position where the openings 511a, 512a or the openings 511b, 512b are not closed by the closing plate portions 521a, 521b, 521c.

FIG. 9 is an external perspective view showing an example of the shutter drive unit according to the first embodiment, and FIG. 10 is an exploded perspective view of the shutter drive unit according to the first embodiment. As shown in FIGS. 9 and 10, the shutter drive unit 53 includes a housing portion 530, a compression spring 533 having one end fixed to the housing portion 530, and a base end biased to the other end of the compression spring 533. Rod 534. Further, the shutter drive unit 53 is urged by a coil spring 535 that is rotatably held by the housing portion 530 and has one end locked to the housing portion 530, and the other end of the coil spring 535, and is engaged with the movable shutter 521. Link 536 to be joined.

The housing portion 530 is attached to the unit base 531 from above, a unit base 531 formed with a sliding groove 531a in which the rod 534 slides and a columnar shaft portion 531b that rotatably supports the link 536. A unit cover 532. The unit cover 532 is formed with a plurality of convex portions 532a and 532b that protrude rightward or leftward. A compression spring 533, a coil spring 535, a link 536, and a part of the rod 534 are disposed in a space formed by the unit base 531 and the unit cover 532.

The rod 534 is continuous with the extending portion 534a extending in the front-rear direction, the rear end of the extending portion 534a, a base end 534b fixed to the other end of the compression spring 533, and the compression spring 533 from the base end 534b. And a contact portion 534d that comes into contact with the circuit breaker body 1 and is pressed from the circuit breaker body 1. In the state shown in FIGS. 9 and 10, the base end portion 534 b of the rod 534 is locked to the housing portion 530 in a state where the base end portion 534 b is urged forward by the compression spring 533. When the breaker body 1 is housed in the drawer frame 3, the contact portion 534d of the rod 534 is pushed rearward by the breaker body 1 against the pushing back force of the compression spring 533, and the rod 534 moves backward. To do.

The link 536 is formed in an L shape, and a corner portion is rotatably supported by a shaft portion 531b of the unit base 531. The link 536 is biased by an opening 536a into which the shaft portion 531b is inserted and the other end of the coil spring 535, and a first arm portion 536b that biases the engaging portion 534c of the rod 534 forward, and a tip 536d. And a second arm portion 536c that protrudes from the opening 530a of the housing portion 530 and is inserted into the opening 521g of the movable shutter 521.

When the rod 534 is moved backward by the circuit breaker body 1, the tip of the first arm portion 536b is pushed backward by the engaging portion 534c of the rod 534. When the engaging portion 534c moves rearward, the first arm portion 536b rotates clockwise in plan view. Therefore, the second arm portion 536c rotates clockwise in plan view with the shaft portion 531b as the rotation center, and the tip 536d of the second arm portion 536c moves from left to right. The tip 536d of the second arm portion 536c is engaged with the opening 521g of the movable shutter 521. Therefore, the movable shutter 521 moves to the open position as the tip 536d moves in the right direction.

The shutter drive unit 53 is not limited to the configuration shown in FIGS. 9 and 10 and may have a configuration for holding the rod in a state where the movable shutter 521 is in the release position. FIG. 11 is a bottom view of another example of the shutter drive unit according to the first embodiment. 12 is an external perspective view of a rod of the shutter drive unit shown in FIG. 13 and 14 are plan views of the shutter drive unit in a state where a rod and a link are attached to the unit base shown in FIG. FIG. 15 is a cross-sectional view taken along line XV-XV shown in FIG.

The shutter drive unit 53 shown in FIG. 11 is different from the shutter drive unit 53 shown in FIG. 9 in a part of the unit base 531 and a part of the shape of the rod 534. As shown in FIG. 12, the rod 534 has a protrusion 534e that protrudes downward from the lower portion of the base end portion 534b. 11 and 13, the unit base 531 includes a guide groove 531c that guides the movement of the protrusion 534e provided on the rod 534 in the front-rear direction, and a recess 531d that continues to the guide groove 531c in the left direction. Have The concave portion 531d has an inclined portion 531e that guides the protruding portion 534e into the guide groove 531c as the rod 534 moves rearward.

When the circuit breaker body 1 is pulled out from the inside of the drawer frame 3, as shown in FIG. 13, the extending portion 534 a of the rod 534 is pulled forward by urging by a compression spring 533 (not shown). When the circuit breaker body 1 is moved from the state shown in FIG. 13 toward the drawer frame 3, the rod 534 moves rearward while the projection 534e is guided by the guide groove 531c, and the state shown in FIG. 14 is obtained. Thereby, the movable shutter 521 is moved from the blocking position to the release position.

Further, when the breaker body 1 is pulled out from the inside of the drawer frame 3, the rod 534 is moved rearward, and the rod 534 is rotated when the protrusion 534e is located at the position facing the recess 531d. The protrusion 534e enters the recess 531d. In this state, if the force for pushing the rod 534 backward is eliminated, the protrusion 534e is locked by the recess 531d. Since the movable shutter 521 is moved from the blocking position to the release position until the projection 534e faces the recess 531d, the movable shutter 521 can be held at the release position.

Accordingly, the movable shutter 521 on the power supply side and the movable shutter 521 on the load side can be individually or simultaneously opened at the time of maintenance and inspection, whereby the circuit on the power supply side and the circuit on the load side in the terminal device 2 are individually separated. Can be checked at or simultaneously. The base end portion 534b of the rod 534 is formed in an arc shape with the extending portion 534a as the axis center. Therefore, even if the rod 534 is rotated, the distance between the base end portion 534b of the rod 534 and the first arm portion 536b does not substantially change, so that the force applied from the rod 534 to the link 536 becomes too large. A situation in which the link 536 buckles can be avoided.

In addition, when the breaker body 1 is moved toward the drawer frame 3 in a state where the protrusion 534e is locked by the recess 531d, the rod 534 is moved backward by the breaker body 1. At this time, the protrusion 534e moved to the recess 531d rotates when moving backward while sliding on the inclined portion 531e of the recess 531d, so that the circuit breaker body 1 is housed in the drawer frame 3. Until then, the posture of the rotated rod 534 returns to its original position, and the engagement between the projection 534e and the recess 531d is released. Therefore, when the breaker body 1 is subsequently pulled out from the drawer frame 3, the rod 534 is moved by the compression spring 533. At this time, since the protruding portion 534e is in the state returned to the guide groove 531c, the protruding portion 534e moves along the guide groove 531c, and the protruding portion 534e moves further forward than the recessed portion 531d. Therefore, the position of the movable shutter 521 does not remain at the release position.

FIG. 16 is a partial cross-sectional view of the drawer-type circuit breaker in a state where the circuit breaker body according to the first embodiment is housed in the drawer frame, and FIG. 17 is a drawing of the circuit breaker body according to the first embodiment. It is a partial cross section figure of the drawer type circuit breaker of the state pulled out from the inside of a frame. 16 and 17, the drawer frame 3 and the drawer rail 4 are omitted.

As shown in FIG. 10, when the breaker body 1 is housed in the drawer frame 3, the breaker-side conductor 11-1 is connected to the terminal housing portion of the terminal device 2 through the opening 512 a of the second fixed shutter 512. 215 is inserted. In the terminal accommodating portion 215, the circuit breaker side conductor 11-1 is connected to the connector 223 of the lead frame side conductor 22-1. Similarly, the breaker-side conductor 11-2 is inserted into the terminal accommodating portion 215 of the terminal device 2 through the opening 511a of the first fixed shutter 511 and connected to the connector 223 of the lead frame-side conductor 22-2. . The breaker-side conductor 11-3 is inserted into the terminal accommodating portion 215 of the terminal device 2 through the opening 512a of the second fixed shutter 512, and is connected to the connector 223 of the lead frame-side conductor 22-3. In a state where the circuit breaker body 1 is housed in the drawer frame 3, the rod 534 is pushed into the shutter drive unit 53.

As shown in FIG. 17, when the breaker body 1 is pulled forward from the inside of the drawer frame 3 from the state shown in FIG. 16, the drawer type circuit breaker 100 has been pushed into the unit storage portion 217 of the breaker body 1. The rod 534 is pushed forward by the extension force of the compression spring 533 shown in FIG. Therefore, after the breaker-side conductors 11-1, 11-2, 11-3 pass through the openings 511a, 512a, the tip 536d of the second arm portion 536c of the shutter drive unit 53 moves the movable shutter 521 to the closed position. Let As a result, the openings 511a and 512a are closed by the closing plate portions 521a, 521b and 521c.

Next, the configuration of the insulating base 21, the configuration of the fixed shutter unit 51, and the relationship between the insulating base 21 and the fixed shutter unit 51 will be described. First, the configuration of the insulating base 21 will be specifically described. FIG. 18 is a front view illustrating an example of the insulating base according to the first embodiment, and FIG. 19 is an external perspective view illustrating an example of the insulating base according to the first embodiment.

18 and FIG. 19, the insulating base 21 is formed symmetrically. The insulating base 21 includes a wall portion 211 that is an upper wall portion, a wall portion 212 that is a bottom wall portion, a wall portion 213 that is a left side wall portion, and a wall portion 214 that is a right side wall portion. Terminal storage portions 215 and 216 and two unit storage portions 217 are formed in a space surrounded by the walls 211, 212, 213 and 214. Each of the two unit storage portions 217 is a space in which the shutter drive unit 53 described above is stored, and is formed between the terminal storage portion 215 and the terminal storage portion 216.

The wall portion 211 has a sliding surface 211a on which the movable shutter 521 slides, and a guide portion 211b which is disposed in front of the sliding surface 211a and protrudes downward. The guide 211b prevents the movable shutter 521 from falling off the sliding surface 211a.

The wall portion 212 includes a sliding surface 212a on which the movable shutter 521 slides, and a guide portion 212b that is disposed in front of the sliding surface 212a and protrudes upward. The guide 212b suppresses the movable shutter 521 from falling off the sliding surface 212a.

The wall portions 213 and 214 have sliding grooves 213a and 214a and stopper portions 213b and 214b. The plurality of convex portions 532a of the shutter drive unit 53 shown in FIG. 10 slide in the slide grooves 213a and 214a when the shutter drive unit 53 is inserted into the unit storage portion 217. Then, when the plurality of convex portions 532b of the shutter drive unit 53 shown in FIG. 10 hit the stopper portions 213b and 214b, the rearward movement of the shutter drive unit 53 is restricted.

The wall portions 213 and 214 have sliding surfaces 213c and 214c. The two movable shutters 521 slide on the sliding surfaces 211a and 212a and the sliding surfaces 213c and 214c described above, whereby the two movable shutters 521 can be moved in the left-right direction.

The wall portions 213 and 214 are formed with first projecting portions 213d and 214d, second projecting portions 213e and 214e, and engaging portions 213f and 214f that project forward from the sliding surfaces 213c and 214c, respectively. The The second projecting portions 213e and 214e project forward from the first projecting portions 213d and 214d, and the engaging portions 213f and 214f project forward from the second projecting portions 213e and 214e. The front surfaces of the first protrusions 213d and 214d are first shutter mounting surfaces that come into contact with the back surface of the first fixed shutter 511, and the front surfaces of the second protrusions 213e and 214e are the second fixed shutter 512. It is the 2nd shutter attachment surface which the back surface of contacts. The distance between the front surface of the first protrusions 213d and 214d and the sliding surfaces 213c and 214c in the front-rear direction is larger than the thickness of the movable shutter 521 in the front-rear direction.

The engaging portion 213f is formed in an L shape, and includes a first extending portion 213f1 extending forward, and a second extending portion 213f2 extending leftward from the tip of the first extending portion 213f1. Have The engaging part 214f includes a first extending part 214f1 extending forward and a second extending part 214f2 extending rightward from the tip of the first extending part 214f1.

Thus, the engaging portions 213f and 214f extend in the left-right direction and in the direction toward the outside of the circuit breaker body 1, that is, in the direction in which the tips are separated from each other. Therefore, the engaging portions 213f and 214f can be easily disposed at a position where there are no other portions facing each other in the front-rear direction, and the insulating base 21 can be integrally formed by molding.

FIG. 20 is a diagram illustrating a configuration example of the first fixed shutter according to the first embodiment. As shown in FIG. 20, the first fixed shutter 511 includes an opening 511a into which the breaker-side conductor 11 is inserted, an opening 511b into which the breaker-side conductor 12 is inserted, and an opening 511c into which the rod 534 is inserted. Have The first fixed shutter 511 includes an opening 511d into which the tip 536d of the second arm 536c is inserted, a plurality of openings 511e and 511h into which the second protrusion 213e is inserted, and an engaging portion 213f. It has the some opening 511f and 511i inserted, and the two recessed parts 511g engaged with the some guide part 211b. In addition, although the some recessed part 511g is formed in the shape which can be fitted with the some guide parts 211b and 212b, what is necessary is just a shape which can engage, and is not limited to the shape shown in FIG.

FIG. 21 is a diagram illustrating a configuration example of the second fixed shutter according to the first embodiment. As shown in FIG. 21, the second fixed shutter 512 protrudes downward from an opening 512a into which the circuit breaker-side conductor 11 is inserted, an opening 512b into which the circuit breaker-side conductor 12 is inserted, and engage portions 213f, It has a plurality of convex engaging portions 512c and 512d that engage with 214f, and a plurality of concave portions 512e that engage with the plurality of guide portions 211b and 212b. The plurality of recesses 512e may be any shape that can engage with the plurality of guide portions 211b and 212b, and is not limited to the shape shown in FIG.

The second fixed shutter 512 has a plurality of notches 512f, 512g, and 512h into which at least one of the first extending portions 213f1 and 214f1 is inserted. The cutout portion 512f is cut out toward the left, and the cutout portions 512g and 512h are cut out toward the right. The notch portion 512f is disposed adjacent to the above-described engaging portion 512c, and the notch portion 512g is disposed adjacent to the above-described 512d. The notch 512h is disposed below the notch 512g.

Next, a method for attaching the fixed shutter portion 51 and the movable shutter portion 52 to the insulating base 21 will be described. FIG. 22 is a diagram illustrating a state in which the shutter drive unit is attached to the insulating base according to the first embodiment. FIG. 23 is a diagram illustrating a state in which the movable shutter unit is attached to the insulating base according to the first embodiment. FIG. 24 is a diagram illustrating a state in which the first fixed shutter is attached to the insulating base according to the first embodiment. FIG. 25 is a diagram illustrating a state in which the second fixed shutter is attached to the insulating base according to the first embodiment. FIG. 26 is a front view of the terminal device to which the shutter device according to the first embodiment is attached. FIG. 27 is a cross-sectional view taken along line XXII-XXII shown in FIG. In FIGS. 22, 23, 24, 25, 26, and 27, the drawing frame side conductor 22 and the drawing frame side conductor 23 are not shown in the insulating base 21 for convenience of explanation.

First, as shown in FIG. 22, three terminal units 20-1, 20-2, 20-3 are arranged adjacent to each other in the left-right direction. Next, two shutter drive units 53 are placed in the two unit storage portions 217 formed on the insulating base 21 of the middle terminal unit 20-2 among the three terminal units 20-1, 20-2, 20-3. Inserted. The two shutter drive units 53 are inserted into the two unit storage portions 217 in a state where the top, bottom, left, and right are inverted.

Subsequently, as shown in FIG. 23, two movable shutters 521 are attached to the terminal units 20-1, 20-2, and 20-3. Specifically, one of the two movable shutters 521 is slidably disposed on the upper sliding surfaces 211a, 213c, and 214c, and the opening 521g is the tip of the second arm portion 536c in the upper shutter drive unit 53. It is inserted into 536d. The other movable shutter 521 is slidably disposed on the lower sliding surfaces 212a, 213c, and 214c, and the opening 521g is inserted into the tip 536d of the second arm portion 536c in the lower shutter drive unit 53. Is done.

Note that one movable shutter 521 is disposed between the sliding surface 211a and the guide portion 211b, thereby preventing the terminal unit 20 from falling off. Further, the other movable shutter 521 is arranged between the sliding surface 212a and the guide portion 212b, so that the terminal unit 20 is prevented from falling off.

Subsequently, as shown in FIG. 24, the first fixed shutter 511 is attached to the insulating base 21 of the terminal unit 20-2. In the state shown in FIG. 24, the upper and lower concave portions 511g of the first fixed shutter 511 are fitted into the guide portions 211b and 212b of the insulating base 21 of the terminal unit 20-2.

Furthermore, the second protrusion 213e of the terminal unit 20-1 and the second protrusion 214e of the terminal unit 20-2 are fitted into the opening 511h of the first fixed shutter 511. The second protrusion 213e of the terminal unit 20-2 and the second protrusion 214e of the terminal unit 20-3 are fitted into the opening 511e of the first fixed shutter 511. The engaging portion 213f of the terminal unit 20-1 and the engaging portion 214f of the terminal unit 20-2 are fitted into the opening 511i of the first fixed shutter 511, and the terminal unit is inserted into the opening 511f of the first fixed shutter 511. The engaging portion 213f of 20-2 and the engaging portion 214f of the terminal unit 20-3 are fitted.

In this way, the first fixed shutter 511 is fitted into the terminal units 20-1, 20-2, 20-3. Therefore, it is possible to connect the three terminal units 20-1, 20-2, and 20-3 by the first fixed shutter 511 while attaching the first fixed shutter 511 to the terminal unit 20-2. In the state shown in FIG. 24, the above-described rods 534 of the two shutter drive units 53 are in a state of protruding from the above-described opening 511b of the first fixed shutter 511.

Subsequently, as shown in FIGS. 25 and 27, the second fixed shutter 512 is attached to each of the terminal units 20-1 and 20-3 in the state where the first fixed shutter 511 is attached. 25 and 27, each engaging portion 512c of the second fixed shutter 512 is engaged with the engaging portions 213f and 214f of the two adjacent terminal units 20, and the second fixed shutter 512 The engaging portion 512d is engaged with one of the engaging portions 213f and 214f of the terminal unit 20.

Specifically, the engaging portion 512 c of the second fixed shutter 512 is inserted between the engaging portions 213 f and 214 f of the two adjacent terminal units 20 and the front surface of the first fixed shutter 511. Therefore, the engaging portion 512c of the second fixed shutter 512 is sandwiched between the back surface of the second extending portions 213f2 and 214f2 of the engaging portions 213f and 214f and the front surface of the first fixed shutter 511.

Further, the engaging portion 512d of the second fixed shutter 512 is a space formed between a plane including the front surface of the second projecting portion 213e and the back surface of the second extending portion 213f2 of the engaging portion 213f, or It is inserted into a space formed between a plane including the front surface of the second projecting portion 214e and the back surface of the second extending portion 214f2 of the engaging portion 214f. Thereby, the engaging part 512d of the second fixed shutter 512 is engaged with either the engaging part 213f or 214f.

Further, at least one of the first extending portions 213f1 and 214f1 is inserted into the notches 512f and 512g of the second fixed shutter 512, and is engaged with at least one of the engaging portions 213f and 214f. The notch portion 512f is formed in a region including the left and right sides and the lower side of the engaging portion 512c. The first extending portions 213f1 and 214f1 are inserted into a region of the notch portion 512f located below the engaging portion 512c, and at least one of the first extending portions 213f1 and 214f1 is inserted into the notch portion 512g. Thereafter, by moving the second fixed shutter 512 downward, at least one of the engaging portions 213f and 214f is inserted into the notched portions 512f and 512g, and at least one of the engaging portions 213f and 214f is notched. 512f and 512g are engaged, and the engaging portions 512c and 512d are engaged with the engaging portions 213f and 214f. Similarly, at least one of the first extending portions 213f1 and 214f1 is inserted into the notch portion 512h of the second fixed shutter 512, and is engaged with at least one of the engaging portions 213f and 214f.

The plate thickness of the first fixed shutter 511 is substantially the same as the distance between the front surface of the first protrusions 213d and 214d and the front surface of the second protrusions 213e and 214e. Therefore, the back surface of the second fixed shutter 512 is pressed against the front surface of the first fixed shutter 511 and the front surface of the second protruding portion 213e. Further, the engaging portion 512d of the second fixed shutter 512 is pressed against the back surface of the second extending portion 213f2 of the engaging portion 213f or the back surface of the second extending portion 214f2 of the engaging portion 214f.

Thus, the two second fixed shutters 512 are attached to the terminal unit 20 to which the first fixed shutter 511 is attached in a state where a part of the two second fixed shutters 512 overlaps with a part of the first fixed shutter 511. Therefore, the first fixed shutter 511 is disposed between the terminal unit 20 and the second fixed shutter 512, and is prevented from falling off from the terminal unit 20.

In the above-described example, the circuit breaker body 1 is provided with the second protrusions 213e and 214e on the insulating base 21, but the circuit breaker body 1 is configured without the second protrusions 213e and 214e on the insulation base 21. It may be. In this case, the configuration of the fixed shutter unit 51 is also partially different. FIG. 28 is an external perspective view illustrating another example of the insulating base according to the first embodiment. FIG. 29 is a front view of another example of the fixed shutter unit according to the first embodiment. 30 is a front view showing a state in which the fixed shutter portion shown in FIG. 29 is attached to the insulating base shown in FIG.

28 is not provided with the second protrusions 213e and 214e shown in FIG. The distance between the plane including the front surface of the first protrusions 213d and 214d and the back surface of the second extending portions 213f2 and 214f2 of the engaging portions 213f and 214f is the first fixed shutter 511 and the second fixed shutter. The thickness of each of 512 is substantially the same.

The first fixed shutter 511 shown in FIG. 29 has a convex engaging portion 511k protruding downward instead of the openings 511e, 511f, 511h, 511i shown in FIG. Also, the second fixed shutter 512 shown in FIG. 29 has a convex engaging portion 512i protruding downward instead of the engaging portion 512c shown in FIG. The engaging portions 511k and 512i are disposed adjacent to the cutout portions into which the first extending portions 213f1 and 214f1 of the engaging portions 213f and 214f are inserted. The width of the engaging portion 512i is smaller than the width of the engaging portion 512c. The widths of the first fixed shutter 511 and the second fixed shutter 512 are substantially the same as the width of the insulating base 21. Here, “width” means the length in the left-right direction.

As shown in FIG. 30, the engaging portions 213f and 214f provided on the insulating base 21 of the terminal unit 20-2 engage with the plurality of engaging portions 511k of the first fixed shutter 511 shown in FIG. Further, the engaging portion 213f provided on the insulating base 21 of the terminal unit 20-1 is engaged with the engaging portion 512i of the second fixed shutter 512 shown in FIG. Further, the engaging portion 214f provided on the insulating base 21 of the terminal unit 20-3 is engaged with the engaging portion 512i of the second fixed shutter 512 shown in FIG. Thus, the circuit breaker body 1 may have a configuration in which the second protrusions 213e and 214e are not provided on the insulating base 21. In addition, the circuit breaker main body 1 may have a configuration that includes one terminal unit 20 and performs an opening operation and a closing operation of an electric circuit of a single-phase circuit.

As described above, the drawer type circuit breaker 100 according to the first embodiment includes the circuit breaker body 1, the terminal device 2, the drawer frame 3, and the shutter device 5. The terminal device 2 includes a terminal unit 20 including a plurality of lead frame side conductors 22 and 23 connected to a power source side conductor and a load side conductor, and an insulating base 21 into which the plurality of lead frame side conductors 22 and 23 are inserted. A plurality of them are disposed in the drawer frame 3. The circuit breaker body 1 has a plurality of circuit breaker side conductors 11 and 12 connected to the plurality of lead frame side conductors 22 and 23 in a state of being housed in the drawer frame 3, and the circuit breaker main body 1 is drawn out from the inside of the drawer frame 3. Is possible. The shutter device 5 includes a first fixed shutter 511, a second fixed shutter 512, and a movable shutter 521. The first fixed shutter 511 has a plurality of openings 511 a and 511 b into which the plurality of circuit breaker-side conductors 11 and 12 are inserted when the circuit breaker body 1 is housed in the drawer frame 3. The second fixed shutter 512 has a plurality of openings 512 a and 512 b into which the plurality of circuit breaker-side conductors 11 and 12 are inserted when the circuit breaker body 1 is housed in the drawer frame 3. The movable shutter 521 closes the plurality of openings 511a and 512a or the plurality of openings 511b and 512b when the circuit breaker body 1 is pulled out from the inside of the drawer frame 3. The plurality of insulating bases 21 are arranged in a direction orthogonal to the pulling-out direction, which is the direction in which the breaker body 1 is pulled out. Each of the plurality of insulating bases 21 includes a pair of wall portions 213 and 214 that face each other in a direction orthogonal to the drawing direction. Each of the pair of wall portions 213 and 214 includes engagement portions 213f and 214f that engage with at least one of the first fixed shutter 511 and the second fixed shutter 512. Each of the engaging portions 213f and 214f has a first extending portion 213f1 and 214f1 extending in the pulling direction, and a second extending from the tip of the first extending portions 213f1 and 214f1 in a direction orthogonal to the pulling direction. Extending portions 213f2 and 214f2. One second extending portion 213f2 and the other second extending portion 214f2 of the pair of wall portions 213 and 214 extend away from each other. Since the engaging portions 213f and 214f extend in the direction opposite to the direction in which the tips face each other, the engaging portions 213f and 214f can be easily disposed at a position where there are no other portions facing each other in the front-rear direction. The insulating base 21 can be integrally formed by molding.

Also, the first fixed shutter 511 has openings 511f and 511i into which the first extending portions 213f1 and 214f1 are inserted. The openings 511f and 511i are an example of a first opening. The second fixed shutter 512 protrudes downward from notches 512f and 512g into which at least one of the first extending portions 213f1 and 214f1 is inserted, and the openings 511f and 511i of the first fixed shutter 511 are the first extending. Engagement portions 512c and 512d that engage with the second extending portions 213f2 and 214f2 of the engagement portions 213f and 214f in a state where the portions 213f1 and 214f1 are inserted are provided. Accordingly, the second fixed shutter 512 is attached to the terminal device 2 to which the first fixed shutter 511 is attached in a state where a part of the second fixed shutter 512 overlaps with a part of the first fixed shutter 511. Therefore, the first fixed shutter 511 is disposed between the terminal device 2 and the second fixed shutter 512, and the first fixed shutter 511 is prevented from falling off from the terminal device 2. The engaging portions 512c and 512d are examples of the shutter side engaging portion.

Further, each of the pair of wall portions 213 and 214 has second projecting portions 213e and 214e extending in the pull-out direction. The first fixed shutter 511 has an opening 511e into which the second protrusions 213e and 214e are inserted. The opening 511e is an example of a second opening. The second fixed shutter 512 is in contact with the front surface of the second protrusions 213e and 214e on the surface opposite to the surface facing the circuit breaker body 1. As a result, the second fixed shutter 512 is pressed against the front surface of the second protrusions 213e and 214e while the second protrusions 213e and 214e are engaged with the first fixed shutter 511. The fixed shutter 512 can be held. Therefore, the first fixed shutter 511 and the second fixed shutter 512 can be attached to the terminal device 2 in a more stable state.

Also, the second protrusion 213e of each of the two insulating bases 21 adjacent to each other among the plurality of insulating bases 21 is inserted into the opening 511e. Thereby, since the 1st fixed shutter 511 can be attached ranging over the some insulating base 21, the position shift between the some insulating base 21 can be prevented, for example.

Also, the first fixed shutter 511 and the second fixed shutter 512 are attached to the terminal device 2 in a state where a part of each other overlaps. Accordingly, the first fixed shutter 511 and the second fixed shutter 512 can be attached to the terminal device 2 in a more stable state.

Further, the shutter device 5 includes a shutter drive unit 53 that moves the movable shutter 521 in conjunction with the drawer of the circuit breaker body 1 from the drawer frame 3. The shutter drive unit 53 is disposed between the plurality of lead frame side conductors 22 and 23 inside one insulating base 21 among the plurality of insulating bases 21. Since the shutter drive unit 53 is disposed between the plurality of drawer frame side conductors 22 and 23, it is possible to suppress the width of the insulating base 21 and the width of the drawer type circuit breaker 100 from being increased. A shutter drive unit 53 is disposed at the center of the insulating base 21 in the vertical direction. Therefore, even when the circuit breaker body 1 is twisted and housed in the drawer frame 3, the shutter drive unit 53 is disposed above the drawer frame side conductor 22 and below the drawer frame side conductor 23, respectively. In comparison, the movable shutter 521 can be moved with high accuracy. Further, for example, when the shutter drive unit 53 is arranged on the terminal units 20-1 and 20-3, the shutter drive unit 53 is arranged apart from the left and right, and the circuit breaker body 1 is twisted and inserted left and right. Then, one shutter drive unit 53 is driven early, and the other shutter drive unit 53 is driven with a delay, and the movable shutter 521 driven with a delay is the circuit breaker side conductor 11 or the circuit breaker side conductor 12. There is a possibility of collision. Therefore, by arranging the shutter drive unit 53 on the central insulating base 21 among the plurality of insulating bases 21, even when the drawer-type circuit breaker 100 is housed in the drawer frame 3 in a state of being twisted left and right, The movable shutter 521 can be moved with high accuracy.

The shutter drive unit 53 includes a rod 534 urged in the pull-out direction and a link 536. The link 536 rotates with the movement of the rod 534 in the direction opposite to the pulling-out direction to block the plurality of openings 511a, 511b, 512a, and 512b from the blocking position that blocks the plurality of openings 511a, 511b, 512a, and 512b. Move to the release position to be exposed. Thereby, the shutter drive unit 53 can move the movable shutter 521 with a relatively small force.

Further, the shutter drive unit 53 includes a unit base 531 in which the link 536 is rotatably held, and the rod 534 is inserted along with the movement of the rod 534 in the direction opposite to the pull-out direction. The unit base 531 can hold the rod 534 with the movable shutter 521 in the release position. Thereby, the inside of the terminal device 2 can be inspected with the movable shutter 521 in the release position individually or simultaneously in the circuit on the power supply side and the circuit on the load side during maintenance inspection.

Also, the rod 534 includes a protrusion 534e that protrudes downward, which is a direction orthogonal to the pulling direction. The shutter drive unit 53 includes a guide groove 531c that guides the protrusion 534e, and a recess 531d that is continuous with the guide groove 531c in a direction orthogonal to the pulling direction and locks the protrusion 534e. Thereby, the movable shutter 521 can be easily maintained at the release position.

Further, the concave portion 531d has an inclined portion 531e that causes the protruding portion 534e to enter the guide groove 531c as the rod 534 moves in the direction opposite to the drawing direction. Thereby, by accommodating the circuit breaker body 1 in the drawer frame 3, the protrusion 534e can be returned to the guide groove 531c, and it is easily avoided that the position of the movable shutter 521 is maintained in the release position. it can.

Embodiment 2. FIG.
The drawer type circuit breaker according to the second embodiment is different from the drawer type circuit breaker 100 according to the first embodiment in the number of terminal units 20 and the configuration of the fixed shutter portion. In the following description, components having the same functions as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences from the drawer-type circuit breaker 100 in the first embodiment are mainly described.

FIG. 31 is a front view of the terminal device according to the second embodiment, and FIG. 32 is an external perspective view showing a state in which the shutter device is attached to the terminal device according to the second embodiment. As shown in FIGS. 31 and 32, the terminal device 2A according to the second embodiment includes four terminal units 20-1, 20-2, 20-3, and 20-4 having the same configuration. The shutter device 5A includes a fixed shutter unit 51A, a movable shutter unit 52A, and two shutter drive units 53.

The movable shutter portion 52A has two movable shutters 521A. The movable shutter 521A is different from the movable shutter 521 having three closing plate portions 521a, 521b, and 521c in that there are four closing plate portions.

The fixed shutter portion 51A includes a first fixed shutter 511, a second fixed shutter 512, a third fixed shutter 513, and an auxiliary panel 514. The first fixed shutter 511 is attached to the terminal unit 20-2. The second fixed shutter 512 is attached to the terminal unit 20-1. The third fixed shutter 513 is attached to the two terminal units 20-3 and 20-4. The auxiliary panel 514 is attached to the wall portion 213 of the terminal unit 20-3 and the wall portion 214 of the terminal unit 20-4.

FIG. 33 is an external perspective view of a third fixed shutter according to the second embodiment, and FIG. 34 is an external perspective view of an auxiliary panel according to the second embodiment. As shown in FIG. 33, the third fixed shutter 513 protrudes downward from an opening 513a into which the circuit breaker-side conductor 11 is inserted, an opening 513b into which the circuit breaker-side conductor 12 is inserted, and engages portions 213f, It has a plurality of convex engaging portions 513c, 513d, 513i that engage with at least one of 214f, and a plurality of concave portions 513e that engage with the plurality of guide portions 211b, 212b.

The third fixed shutter 513 includes a plurality of notches 513f, 513g, and 513h into which at least one of the first extending portions 213f1 and 214f1 is inserted, and an opening 513j into which the first extending portions 213f1 and 214f1 are inserted. have. The notches 513f, 513g, and 513h have the same configuration as the notches 512f, 512g, and 512h described above. The opening 513j is disposed adjacent to the engaging portion 513i. In the step of attaching the third fixed shutter 513, the first extending portions 213f1 and 214f1 are inserted into the region of the opening 513j located below the engaging portion 513i, and then the third fixed shutter 513 is moved downward. Let Thereby, in a state where the engaging portions 213f and 214f are inserted into the opening 513j, the engaging portions 213f and 214f engage with the opening 513j and the engaging portion 513i.

The engaging portions 513c, 513d, and 513i of the third fixed shutter 513 function in the same manner as the engaging portions 512c and 512d of the second fixed shutter 512. The concave portion 513e of the third fixed shutter 513 functions in the same manner as the concave portion 512e of the second fixed shutter 512. Therefore, the third fixed shutter 513 is partially overlapped with a part of the first fixed shutter 511, and the terminal units 20-2, 20-3, 20- to which the first fixed shutter 511 is attached. 4 is attached.

As shown in FIG. 34, the auxiliary panel 514 has a plurality of openings 514a and a plurality of openings 514b. The second protrusion 213e of the terminal unit 20-3 and the second protrusion 214e of the terminal unit 20-4 are inserted into the plurality of openings 514a. Further, the engaging portions 213f of the terminal unit 20-3 and the engaging portions 213f of the terminal unit 20-4 are inserted into the plurality of openings 514b. The auxiliary panel 514 is disposed between the third fixed shutter 513 and the terminal units 20-3 and 20-4. Therefore, since the back surface of the third fixed shutter 513 contacts the front surface of the auxiliary panel 514 in addition to the front surface of the second protrusion 213e, the third fixed shutter 513 can be stably attached to the terminal device 2A. it can. The shutter device 5A may have a configuration in which the auxiliary panel 514 is not provided.

As described above, even when the number of poles increases to 4 or more, the fixed shutter portion 51A is attached to the terminal device 2A according to the same principle as that of the drawer type circuit breaker 100 according to the first embodiment. Can do.

The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1 Circuit breaker body, 2, 2A terminal device, 3 drawer frame, 4 drawer rail, 5, 5A shutter device, 10 housing, 10a front part, 11, 11-1, 11-2, 11-3, 12, 12 -1,12-2,12-3 Breaker side conductor, 20, 20-1, 20-2, 20-3, 20-4 terminal unit, 21 insulation base, 22, 22-1, 22-22, 22 -3, 23, 23-1, 23-2, 23-3 Lead frame side conductor, 24 bolt, 25 screw, 31, 32 side plate, 33, 34 holding plate, 41, 42 rail member, 51, 51A fixed shutter part 52, 52A movable shutter part, 53 shutter drive unit, 100 drawer type circuit breaker, 211, 212, 213, 214 wall part, 211a, 212a, 213c, 214c sliding surface, 211 , 212b Guide part, 213a, 214a Sliding groove, 213b, 214b Stopper part, 213d, 214d First protrusion part, 213e, 214e Second protrusion part, 213f, 214f, 512c, 512d, 511k, 512i, 513c, 513d, 513i, 534c engagement portion, 213f1, 214f1, first extension portion, 213f2, 214f2, second extension portion, 215, 216 terminal storage portion, 217 unit storage portion, 219 screw hole, 221, 231 terminal conductor, 221a , 222a bottom part, 221b terminal part, 222,232 relay terminal conductor, 222b tip part, 223,233 connector, 223a, 223b groove part, 511 first fixed shutter, 511a, 511b, 511c, 511d, 511e, 511f 511h, 511i, 512a, 512b, 513a, 513b, 513j, 514a, 514b, 521g, 536a opening, 511g, 512e, 513e, 531d recess, 512 second fixed shutter, 512f, 512g, 512h, 513f, 513g, 513h Notch, 513, third fixed shutter, 514, auxiliary panel, 521, 521A, movable shutter, 521a, 521b, 521c, closing plate, 521d, 521e, connecting part, 521f, 532a, 532b, convex part, 530, housing part, 531 unit Base, 531a sliding groove, 531b shaft portion, 531c guide groove, 531e inclined portion, 532 unit cover, 533 compression spring, 534 rod, 534a extending portion, 534b proximal end portion, 534d contact Touch part, 534e protrusion, 535 coil spring, 536 link, 536b first arm part, 536c second arm part, 536d tip.

Claims (9)

1. A drawer frame,
   A plurality of terminal units including a plurality of lead frame side conductors connected to the power source side conductor and the load side conductor, and an insulating base into which the plurality of lead frame side conductors are inserted, and are disposed in the lead frame; A terminal device,
   A circuit breaker body having a plurality of circuit breaker side conductors connected to the plurality of drawer frame side conductors in a state of being housed in the drawer frame, and capable of being pulled out from within the drawer frame;
   A plurality of fixed shutters having a plurality of openings into which the plurality of circuit breaker-side conductors are inserted when the circuit breaker body is housed in the drawer frame; and when the circuit breaker body is pulled out from the drawer frame. A movable shutter that closes the plurality of openings, and a shutter device,
   The plurality of insulating bases are arranged in a second direction that is a direction orthogonal to a first direction in which the breaker body is pulled out,
   Each of the plurality of insulating bases is
   A pair of walls facing each other in the second direction;
   Each of the pair of wall portions is
   An engaging portion that engages with the fixed shutter;
   Each of the engaging portions is
   A first extending portion extending in the first direction, and a second extending portion extending in the second direction from the tip of the first extending portion,
   One of said 2nd extending | stretching parts of said pair of wall part and said other 2nd extending | stretching part are extended | stretched in the direction away from each other.
2. The plurality of fixed shutters includes a first fixed shutter and a second fixed shutter,
   The first fixed shutter is
   A first opening into which the first extending portion of the engaging portion is inserted;
   The second fixed shutter is
   A notch into which the first extending portion of the engaging portion is inserted;
   The engagement in a state of projecting in a third direction orthogonal to each of the first direction and the second direction and being inserted into the first extension portion in the first opening of the first fixed shutter The drawer-type circuit breaker according to claim 1, further comprising a shutter-side engaging portion that engages with the second extending portion of the portion.
3. Each of the pair of wall portions is
   A protrusion extending in the first direction;
   The first fixed shutter is
   A second opening into which the protrusion of the insulating base is inserted;
   The second fixed shutter is
   The drawer-type circuit breaker according to claim 2, wherein the protrusion is in contact with a surface opposite to a surface facing the circuit breaker body.
4. In the second opening,
   The drawer-type circuit breaker according to claim 3, wherein the protrusions of two insulating bases adjacent to each other among the plurality of insulating bases are inserted.
5. The shutter device is
   A shutter drive unit that moves the movable shutter in conjunction with the drawer from the drawer frame of the circuit breaker body,
   The shutter drive unit is
   5. The drawer type circuit breaker according to claim 1, wherein the drawer type circuit breaker is disposed between the plurality of lead frame side conductors inside one insulation base among the plurality of insulation bases.
6. The shutter drive unit is
   A rod biased in the first direction;
   A link that rotates as the rod moves in a direction opposite to the first direction and moves the movable shutter from a blocking position that closes the plurality of openings to a release position that exposes the plurality of openings. 6. A drawer type circuit breaker according to claim 5, characterized in that:
7. The shutter drive unit is
   A unit base that rotatably holds the link and into which the rod is inserted as the rod moves in a direction opposite to the first direction;
   The unit base is
   The drawer type circuit breaker according to claim 6, wherein the rod can be held in a state where the movable shutter is in the release position.
8. The rod is
   A protrusion projecting in a direction orthogonal to the first direction;
   The shutter drive unit is
   A guide groove for guiding the protrusion,
   The drawer-type circuit breaker according to claim 7, further comprising a recess that is continuous with the guide groove in a direction orthogonal to the first direction and that locks the protrusion.
9. The recess is
   The drawer type circuit breaker according to claim 8, further comprising an inclined portion that causes the protrusion to enter the guide groove as the rod moves in a direction opposite to the first direction.

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