JP4376251B2 - Circuit breakers and distribution boards - Google Patents

Description

  The present invention relates to a circuit breaker attached to, for example, a single-phase three-wire distribution board and a distribution board including the circuit breaker.

  Conventionally, a circuit breaker attached to a distribution board as a branch breaker has been used. And about the circuit breaker used for the distribution board of a single-phase three-wire system, it is provided with two terminals, and one terminal of these two terminals connects a conductive bar selectively, and becomes 100V A configuration that can be used by switching between 200V is known.

As such a prior art, a three-stage insertion portion is formed at one end portion of the vessel body, each of which can insert a conductive bar, and a common terminal is provided in a storage portion communicating with the lowermost insertion portion. A configuration is known in which an inner storage portion that is arranged and communicated with the upper two-stage insertion portion includes a slide member that houses one selection terminal so as to be slidable up and down. In such a configuration, the conductive bar is connected to the common terminal, and the conductive bar is connected in a state where the selection terminal is moved to one of the insertion portions, thereby switching between 100V and 200V. It is possible. In addition, a through hole is formed in the ceiling portion of the container body, and the display part formed on the upper portion of the slide member is designed to visually recognize the position of the selection terminal by approaching or leaving the through hole. (For example, see Patent Document 1).
JP 2000-35341 A

  In the configuration including the fixed common terminal and the selection terminal movable by the slide as in the conventional case, for example, when sliding from the top to the bottom, a tool or the like is pushed into the through hole communicating with the inner storage portion from the upper surface. On the contrary, when sliding from the bottom to the top by moving the selection terminal, it is necessary to move the selection terminal by moving the protrusion protruding outward from the inner storage part from the bottom to the top. Since the operation unit varies depending on the moving direction, there is a problem that the operation is misleading. Moreover, since the display part which shows the position of a selection terminal displays only by approaching or leaving | separating to a through-hole, confirmation of the position of a selection terminal is not necessarily easy. Furthermore, in this configuration, the configuration indicating whether it is 100V or 200V is not clearly shown.

  The present invention has been made in view of the above points, and has a high degree of freedom in dealing with the arrangement of conductors on the power supply side, and can easily check the switching state of the switching terminal portion and a circuit breaker It aims at providing the distribution board provided with.

The circuit breaker according to claim 1 is a housing provided with a plurality of conductor connection ports , a power supply connection portion storage portion and a display window; and is housed in the power supply connection portion storage portion and pivotally supported to move. A power supply connection portion having a plurality of selection terminal portions that can be provided and selectively face the conductor connection port and can be used by switching between 100V and 200V; and disposed on an upper portion of the power supply connection storage portion ; It is made of a synthetic resin that is separate from the power supply connection part, and includes a shaft part, a display part located above the shaft part, and an action part located below the shaft part, along the axial direction of the power supply connection part In the case where the front / rear direction is pivotally supported so as to be pivotable, the action part is pushed by the power supply connection part and interlocked with the movement of at least one selection terminal part, and the selection terminal part is in a connection state of 200V Display that displays from the display window a display that displays a different color from the housing Stage and; is obtained by including a; a load connection section connected to the load; the power connection and the circuit breaker unit to be connected to be cut off the circuit between the load connection portion.

  In this configuration, since a plurality of selectable terminal portions that can move are provided, the degree of freedom in dealing with the arrangement of the conductors on the power supply side is higher than in the configuration that includes a fixedly provided terminal. For example, the voltage and phase can be easily switched. The connection state between 100 V and 200 V of the selection terminal portion is indicated from the display window by the display portion of the display means. In particular, it can be easily confirmed that the selection terminal portion has selected 200V.

  A distribution board according to claim 2 comprises: a base having the circuit breaker according to claim 1 and a main earth leakage breaker to which the circuit breaker is connected; and a cover attached to the front side of the base. is there.

  And in this structure, since the circuit breaker of Claim 1 was provided, the distribution board which show | plays the effect | action of Claim 1 is obtained.

  According to the circuit breaker of the first aspect, since the plurality of selectable terminal portions each movable are provided, the freedom to cope with the arrangement of the conductors on the power source side as compared with the configuration provided with the terminals provided in a fixed manner. The degree can be increased. Moreover, the connection state of 100V and 200V of the selection terminal part can be shown from the display window by the display part of the display means. In particular, it can be easily confirmed that the selection terminal portion has selected 200V.

  According to the distribution board according to claim 2, since the circuit breaker according to claim 1 is provided, the distribution board having the effect according to claim 1 can be obtained.

  Hereinafter, an embodiment of a circuit breaker and a distribution board according to the present invention will be described with reference to the drawings.

  FIG. 1 is a sectional view of a circuit breaker according to an embodiment of the present invention in a 200V state, FIG. 2 is an explanatory diagram of a distribution board with the same circuit breaker attached thereto, and (a) shows a door removed. (B) is a side view with the door closed, FIG. 3 is a plan view of the circuit breaker, (a) is in an on state, (b) is in an off state, 4 is a rear view of the circuit breaker with the door opened, FIG. 5 is a front view of the circuit breaker, and FIG. 6 is a bottom view of a part of the circuit breaker. FIG. 8 is a sectional view of a part of the circuit breaker, and FIG. 8 is an enlarged sectional view of a part of the circuit breaker.

  In FIG. 2, reference numeral 1 denotes a distribution board. This distribution board 1 is mainly installed in a home or a store, and has a base 2 installed on a vertical wall surface and the front side of the base 2. A frame-shaped cover 3 to be attached and a door 4 that can be opened and closed on the front side of the cover 3 are provided. Inside the distribution board 1, a limiter mounting portion 5 to which a limiter (not shown) connected to the power supply line is mounted, a main earth leakage breaker 6 to which the secondary side of the limiter is connected, and the main earth leakage breaker 6 A plurality of circuit breakers 11 and the like to which the secondary side is connected are attached and stored.

  In addition, the distribution board 1 is a single-phase three-wire type, and if necessary, three plate-like conductive bars N, L1, and L2 as conductors connected to the secondary side of the main leakage breaker 6 are also used. Prepared. The conductive bars N, L1, and L2 are arranged between the circuit breakers 11 arranged in two upper and lower rows, and each circuit breaker 11 is connected to the neutral conductive bar N and one of the voltage conductive bars L1. Or connected to the conductive bar N of the neutral electrode and the conductive bar L2 of the other voltage electrode to be used as 100V, and to the conductive bar L1 and the conductive bar L2 of both voltage electrodes. By connecting, it is used as 200V.

  Each circuit breaker 11 is a switch that is also called a plug-in breaker, a plug-in terminal breaker, a branch circuit breaker, etc., and in this embodiment, it is a thin type equipped with a white thin case 12. A branch breaker is configured. Note that the circuit breaker 11 is usually provided in a distribution board installed on a vertical wall surface. However, in the following description, the case 12 is described in a state where it is placed on a horizontal plane. . Moreover, the arrangement of terminals in each figure shows a state at 200V.

  And this housing | casing 12 combines a pair of case bodies 13 and 14 formed with the synthetic resin which has insulation, and connects with the pin 16 which is four rivets in this Embodiment, and is a thin box It is formed in a shape. Further, the insides of the case bodies 13 and 14 are partitioned on both sides by front and rear separators 17 and 18 having insulating properties constituting the housing 12. Further, a part of the bottom of the casing 12 is covered with a back cover 19, and a part of the side is covered with a door 20 that can be opened and closed.

  In addition, the housing 12 houses a power supply connection portion 21 at the rear side portion as one end portion, a thermal circuit breaker portion 22 at the center portion, and the front side as the other end portion. The load connecting portion 23 is housed in the portion. Conductor connection ports 25, 26, and 27 are formed at the rear end portion of the casing 12 so as to face the power supply connection portion 21 and at predetermined intervals in the vertical direction. In addition, a pair of circular wire insertion holes 29, 29 are formed at the front end of the housing 12, and a rectangular inspection is located below the wire insertion holes 29, 29. Electric insertion ports 30 and 30 are formed.

  The housing 12 has a pair of front and rear attachment portions 32a that are engaged with and attached to the distribution board on the bottom surface portion 32 of the lower portion, and the front end portion holds the engagement. A lock lever 32b is attached to be movable up and down. The upper top surface portion 33 is formed with an electric wire connecting lever mounting portion 35, a handle mounting portion 36, and a display portion mounting portion 37. Further, on the rear surface portion, each conductor connection port 25, 26, 27 is formed. An operation portion mounting portion 38 is formed between them. Further, both side surfaces of the housing 12 are formed in a planar shape. Name plates 33a and 33b are attached to the top surface 33 of the housing 12 as necessary.

  Then, the circuit breaker 22 is opposed to the bimetal plate 41 and a pair of bimetal plates 41 constituting an overcurrent tripping means connected to the power supply connection portion 21 via a jumper wire 40 that is a copper stranded wire. A pair of contact arms 44 that are movable contact plates connected to these bimetal plates 41 via jumper wires 43 that are copper stranded wires, and fixed to the tips of these contact arms 44. A movable contact 45 and a fixed contact 46 that is connected to the load connecting portion 23 and is contacted with and separated from the movable contact 45 are provided. Further, the contact arm 44 is supported so as to be rotatable about the base end portion, and is biased in a direction in which the movable contact 45 is separated from the fixed contact 46 by a coil spring 48 which is biasing means and is called a main spring. Has been. Each magnetic iron piece 42 is provided with an iron frame 49, a magnetic iron piece spring 49a, a support frame 49b, a square nut 49c, an adjustment screw 49d that is screwed into the square nut 49c, and the like.

  Further, the circuit breaker 22 is provided with a contact opening / closing mechanism 51. The contact opening / closing mechanism 51 includes a handle 52 called a snap that is rotatably attached to the handle attachment portion 36, a shaft 52a that pivotally supports the handle 52, and biases the handle 52 in a predetermined direction. Snap springs 53 and return springs 54 that are wire springs as urging means to be operated, a metal first link 55 that is a link shaft connected to the handle 52, and a trip plate that restricts the moving direction of the first link 55 A second link 56, a synthetic resin pusher 57 that is a movable frame that is pushed by the first link 55 and pushes the contact arm 44, and a latch that is a trip lever that regulates the position of the second link 56. The body 58, 59, the shaft 58a of the latch body 58, and a return spring 60 that is a wire spring as a biasing means for biasing the latch bodies 58, 59 in a predetermined direction are provided. A label 52b indicating 1 indicating ON is attached to the front surface which is one surface of the handle 52, and a label 52c indicating 0 indicating OFF is attached to the rear surface which is the other surface of the handle 52. ing.

  Therefore, in the state where no overcurrent flows, the circuit breaker 22 is guided by the second link 56 whose position is regulated by the latch bodies 58 and 59 so that the first link 55 can push the pusher 57, and the handle By rotating 52 backward (in the direction of arrow A shown in FIG. 1), the first link 55 pushes the pusher 57 downward, and the pusher 57 pushes the contact arm 44 downward. The movable contact 45 is pressed against the fixed contact 46 against the urging force of the coil spring 48, and the state where the circuit is closed is maintained.

  On the other hand, when an overcurrent flows, the circuit breaker 22 bends the bimetal plate 41, moves the latch bodies 58 and 59, and the restriction on the position of the second link 56 is released. Then, the first link 55 is disengaged from the pusher 57, and the movable contact 45 is pulled away from the fixed contact 46 by the urging force of the coil spring 48, and the circuit is interrupted.

  Further, the power supply connection portion 21 is stored in a power supply connection portion storage portion 64 partitioned from other portions by a partition plate 61 formed integrally with the case bodies 13 and 14 or the separators 17 and 18. Further, one side portion of the power supply connection portion storage portion 64 is opened and closed by the door 20. The door 20 includes a base portion 20b having shaft portions 20a and 20a at upper and lower ends, pieces 20c and 20c extending from the base portion 20b and connected to the operation portion mounting portions 38 and 38, respectively. Locking portions 20d and 20d projecting from the portions 20c and 20c toward the inside of the power supply connection portion storage portion 64 are integrally formed. Further, the shaft portions 20a, 20a of the door 20 are pivotally supported by the case body 14 so as to be rotatable and slightly movable in the front-rear direction.

  Further, a display window 65 is formed in the upper part of the power supply connection portion storage portion 64. The display window 65 includes a rectangular through hole, and a bottom plate integrated with the case body 13 disposed below the through hole with a predetermined interval. Accordingly, the display window 65 is white in the same color as the case bodies 13 and 14 when no other member is positioned between the through hole and the bottom plate.

  A pair of upper and lower switching knobs 66 and 66 pivotally supported by about 180 degrees are arranged between the partition plate 61 and the operation unit mounting portions 38 and 38 in the power supply connection portion storage portion 64. Yes. That is, each switching knob 66 is formed of an insulating synthetic resin or the like, and has a base 67 formed by cutting out a part of the disk, and a front shaft portion 68 protruding from the base 67 to the front side. And a columnar rear shaft portion 69 projecting rearward from the base portion 67. The front shaft portion 68 is pivotally supported on the partition plate 61 side via a spacer 71, and the rear shaft portion 69 is pivotally supported in a circular hole 72 formed in the operation portion mounting portion 38. It is supported. In addition, a jig receiving portion that is exposed to the outside through the circular hole 72, that is, a groove for a plus driver is formed in the rear shaft portion 69. Furthermore, a locking receiving portion 67a that protrudes toward the rear side is formed near the edge of the outer periphery of the base portion 67.

  Further, a terminal body 74 is attached to the base 67 of each switching knob 66 at the notched portion. The terminal body 74 is also referred to as a PIR terminal, and a pair of opposing contact portions 75 are formed by bending an elastically deformable and conductive metal plate, and each circuit is connected via a jumper wire 40. It is connected to different bimetal plates 41 of the blocking part 22.

  Then, with the door 20 open, each switching knob 66 is rotated using a jig such as a Phillips screwdriver, so that each contact portion 75 faces one of the conductor connection ports 25, 26, 27. . That is, the contact portion 75 of the terminal body 74 of the upper switching knob 66 is connected to the conductor connection port 25 into which the neutral electrode conductive bar N is inserted or the conductor connection port into which the one voltage electrode conductive bar L1 is inserted. 26, the contact portion 75 of the terminal body 74 of the lower switching knob 66 is connected to the conductor connection port 26 into which the conductive bar L1 of one voltage electrode is inserted or the conductive bar L2 of the other voltage electrode is a conductor. The conductive bars N, L1, L2 inserted in the connection port 27 are elastically sandwiched by the contact portions 75 and electrically connected. Further, when the door 20 is closed, the switching knob 66 engages the locking portion 20d and the locking receiving portion 67a, thereby preventing the rotation and fixing the position.

  Further, a display means 81 that is a display piece is arranged at the upper end portion in the power supply connection portion storage portion 64. The display means 81 is formed of, for example, a red synthetic resin, and has a shaft portion 82 that is pivotally supported by the case body 13 with the front-rear direction as an axial direction, and projects from the shaft portion 82 in the radial direction. A display unit 83 and an action unit 84 are provided. The display means 81 is provided with a display piece spring 86 which is a wire spring as an urging means. Therefore, in a state where no force is applied to the action part 84, the display part 83 faces the display window 65, that is, the display part 83 enters between the through hole of the display window 65 and the bottom plate. It looks like red. When the terminal body 74 of the upper switching knob 66 is pivoted upward so as to face the conductor connection port 25 into which the neutral conductive bar N is inserted, the terminal body 74 is connected to the display piece spring. The action part 84 is pushed against the urging force of 86, the display part 83 comes off from the display window 65, and the display part 83 looks white from the outside.

  Here, the switching operation between 100 V (110 V) and 200 V (220 V) of the power supply connection unit 21 will be described.

  First, the connection state of 100 V is realized by always using the conductive bar N at the neutral electrode at the upper end and using one of the conductive bars L1 and L2. That is, the terminal body 74 of the upper switching knob 66 is rotated upward, and the terminal body 74 of the lower switching knob 66 is rotated either up or down. At this time, the display unit 83 looks white from the outside.

  On the other hand, the connection state of 200 V is realized by using the central conductive bar L1 and the lower conductive bar L2. That is, as shown in FIG. 1, all the terminal bodies 74 of the upper and lower switching knobs 66 are rotated downward. At this time, the display unit 83 looks red from the outside.

  Note that the protruding dimension in the radial direction of the terminal body 74 is larger than the protruding dimension in the radial direction of the base 67 of the switching knob 66, and in the intermediate state of switching, the terminal body 74 abuts on the door 20 and It cannot be closed.

  On the other hand, the load connecting portion 23 constitutes a screwless terminal. The load connecting portion 23 is a pair of terminal plates 101, which are conductive fixed contact plates fixed to the housing 12, and an elastically deformable metal SL terminal. A pair of locking plates 102, also called springs, and a lever 103, which is a pair of insulating synthetic resin handles, are provided. The levers 103 are colored in different colors. Each terminal board 101 includes an electric wire connecting portion 105 disposed along the axial direction of each electric wire insertion port 29. A fixed contact 46 is fixed to a contact support portion 106 extended from the electric wire connection portion 105. In addition, each terminal plate 101 is provided with a guide portion 108 that also serves as a voltage detection portion that is bent and extended from the wire connection portion 105, and the wire connection portion 105 and the guide portion 108 are provided in the housing 12. The ribs 111 and 112 are directly or indirectly abutted and held without rattling. The guide portion 108 is opposed to the voltage detection insertion port 30 provided in the housing 12, and a jig inserted from the voltage detection insertion port 30 is brought into contact with the voltage detection voltage.

  The locking plate 102 includes a base 116 sandwiched between the electric wire connecting portion 105 of the terminal plate 101 and the rib 111, a bent portion 117 extending from the base 116 and bent in an arc shape of about 270 °, A rectangular hole-shaped wire locking portion 118 provided at the tip of the bent portion 117 is provided. The wire locking portion 118 is arranged so that the wire connecting portion 105 is inserted therethrough, and the edge of the wire locking portion 118 is pressed against the wire connecting portion 105 by the urging force of the locking plate 102 to return and deform. Has been.

  Further, the lever 103 includes a shaft portion 121 that is rotatably supported by the wire connection lever mounting portion 35 of the housing 12, a lever operation portion 122 that extends from the shaft portion 121, and a shaft portion 121. And an action part 123 extending substantially opposite to the lever operation part 122.

  Therefore, in the load connecting portion 23, the lever operating portion 122 is pulled upward, so that the action portion 123 pushes the bent portion 117 downward, and the wire locking portion 118 of the locking plate 102 moves to the wire insertion port 29. Open oppositely. In this state, the load-side electric wire is inserted into the electric wire locking portion 118 through the electric wire insertion port 29. Next, by lowering the lever operation part 122 to the lower front side, the locking plate 102 is restored and deformed, and the electric wire into which the edge of the electric wire locking part 118 is inserted is brought into pressure contact with the electric wire connection part 105 of the terminal plate 101. Is electrically connected to the terminal board 101 and is mechanically prevented from coming off. On the other hand, the electric wire can be easily removed by pulling up the lever operation unit 122 again.

As described above, according to the present embodiment, the power supply connection portion 21 is provided with the two switching knobs 66 each including the terminal body 74 serving as the selection terminal portion , and so to speak, the two-axis switching means is provided. The bars N, L1, and L2 can be used in appropriate combinations, and voltage switching and phase switching can be easily performed.

  Then, a display that shows the set voltage, that is, the selection voltage is provided on the top surface portion 33 of the housing 12, and the terminal body 74 is not present in the conductor connection port 25 into which the conductive bar N of the neutral pole (N pole) is inserted, In other words, the display of the top surface 33 changes from white to red when 200 V is selected, and the 200 V voltage is displayed. Therefore, it is possible to easily check the selected voltage, particularly the state where 200 V is selected, and the overvoltage. Application to the load device can be suppressed.

  That is, since a plurality of selectable terminal portions that can be moved are provided, the degree of freedom in dealing with the arrangement of conductors on the power supply side can be increased as compared with a configuration that includes terminals that are fixedly provided. Further, the position of the selection terminal portion can be indicated from the display window by the display portion of the display means. In addition, the conductor connection port is provided facing the position where the single-phase three-wire neutral conductor is disposed and the position where the two voltage conductors are disposed. Since the display unit is configured to be displayed from the display window in a state where the selection terminal unit does not face the position where the body is disposed, the selection terminal unit is out of the low voltage state using the neutral electrode. Since the display unit displays, it is clearly shown that the 200 volt wiring should be connected to the load side with 200 volt connected to the power supply side, and that the 100 volt wiring is mistakenly performed on the load side. Can be suppressed.

  In addition, since the power supply connecting portion 21 is provided with two switching knobs 66, each member can be simplified in configuration and the number of parts can be reduced compared to a configuration in which one terminal is slid up and down. Manufacturing cost can be reduced.

  The present invention can be used as, for example, a circuit breaker attached to a single-phase three-wire distribution board and a distribution board including the circuit breaker.

It is sectional drawing of the 200V state which shows one Embodiment of the circuit breaker of this invention. It is explanatory drawing of the distribution board which attached the circuit breaker same as the above, (a) is the front view of the state which removed the door, (b) is the side view of the state which closed the door. It is a top view of a circuit breaker same as the above, (a) is an ON state, (b) is an OFF state. It is a rear view of the state which opened the door of the circuit breaker same as the above. It is a front view of a circuit breaker same as the above. It is a bottom view of a part of the same circuit breaker. It is sectional drawing of a part of circuit breaker same as the above. It is sectional drawing which expanded a part of circuit breaker same as the above.

Explanation of symbols

1 Distribution board 2 Base 3 Cover 6 Main earth leakage breaker
11 Circuit breaker
12 housing
21 Power connection
22 Circuit breaker
23 Load connection
25, 26, 27 Conductor connection port
64 Power supply connection compartment
65 Display window
74 Terminal body that is the selection terminal
81 Display means
82 shaft
83 Display
84 Action part N, L1, L2 Conductive bar as conductor

Claims (2)

A housing provided with a plurality of conductor connection ports , a power supply connection portion storage portion and a display window;
Provided with a plurality of selection terminal portions that are accommodated in the power supply connection portion accommodating portion so as to be pivotally supported so as to be respectively movable and selectively face the conductor connection port and can be used by switching between 100V and 200V. Power connection;
Located at the upper part of the power connection part storage part and formed of a synthetic resin separate from the power supply connection part, the shaft part, the display part located above the shaft part, and the lower part of the shaft part It is equipped with an action part and is pivotally supported so that the front-rear direction along the axial direction of the power supply connection part can be rotated. The action part is pushed by the power supply connection part and interlocked with the movement of at least one selection terminal part. Display means for displaying, from the display window, a display section for displaying a color different from that of the housing when the selection terminal section is connected to 200V;
A load connection connected to the load;
A circuit breaker that connects the circuit between the power supply connection and the load connection so as to be cut off;
A circuit breaker comprising: A circuit breaker according to claim 1 and a base having a main earth leakage breaker to which the circuit breaker is connected;
A cover attached to the front side of the base;
A distribution board characterized by comprising:

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