JP2009201263A - Distribution panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distribution panel capable of preventing connection failure of a branch breaker. <P>SOLUTION: The distribution panel is provided with: a branch connection unit 2 having two conductive bars 3 connected to a secondary side of a trunk breaker; and a plurality of branch breakers 5, each having a primary connection portion 51, to which the conductive bars 3 are inserted and connected from a direction along the width direction of the conductive bars 3 and having a protrusion portion 54 with a claw portion 54a of the bottom surface of an equipment body 50. The branch connection unit 2 is provided with a placing pedestal 4, in which a space portion 41d is provided on the placing surface for placing the branch breakers 5, to which the protrusion 54 of the branch breaker is movably inserted, in a direction along the width direction of the conductive bars 3. An opening end portion 41e of the space portion 41d is clamped between the claw portion 54a of the protrusion portion 54 and the equipment body 50, when the branch breakers 5 are moved to the conductive bars 3 side in a direction along the width direction of the conductive bars 3, in a state where the protrusion portion 54 is inserted in the space portion 41d and the insertion quantity of the conductive bars 3 for the primary connection portion 51 reaches a predetermined quantity. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a distribution board, and more particularly to a residential distribution board installed in a house.

  Conventionally, as a distribution board, a distribution board for housing (mainly used as an entrance device for a house, etc.) in a single-phase two-wire 100V or single-phase three-wire 100 / 200V circuit of AC 50 Hz or 60 Hz. Is also provided).

  This type of distribution board is a branch circuit (branch circuit) that branches from a main circuit breaker (main switch) or a main circuit (bus) connected to the secondary side of the main circuit breaker and supplies power to a load (electric equipment, etc.) A plurality of branch breakers (branch switches) provided on each branch line) and a cabinet (board body) in which the internal devices are housed (installed) (for example, Patent Document 1) reference).

The distribution board shown in Patent Document 1 is a single-phase three-wire type, and includes three conductive bars (feeding bars) as a main electrical circuit. Two of the three conductive bars are connected to the voltage line (voltage line having a potential of 100V or -100V) via the main breaker, and the remaining one is connected to the neutral line (potential of 0V) via the main breaker. (Neutral wire). The branch breaker is fixed to the cabinet while being electrically connected to two of the three conductive bars. Thus, an AC power supply according to the potential difference between the conductive bars, specifically, a 100V AC power supply or a 200V AC power supply can be supplied to the load.
JP-A-10-241543

  By the way, in the distribution board shown in patent document 1, when accommodating a branch breaker in a cabinet, the connection terminal part which connects a branch breaker to a conductive bar, and the attachment member which fixes a branch breaker to a cabinet are used. The connection terminal portion is a strip plate-shaped connection terminal having a substantially Ω-shaped receiving blade shape, a terminal piece connected to the terminal portion of the branch breaker, and a connection piece connecting the connection terminal and the terminal piece. The conductive bar is integrally formed with a conductive member, and a conductive bar is inserted and connected to the opening of the connection terminal from the width direction. On the other hand, the attachment member is attached to the bottom surface of the branch breaker, and a locking claw inserted into a long hole provided on the cabinet side is formed on the surface of the attachment member facing the cabinet.

  And in the distribution board shown in patent documents 1, with a connection terminal part and an attachment member attached to a branch breaker, a branch breaker is slid to the conductive bar side in a state where a locking claw of the attachment member is inserted into a long hole. Thus, the conductive bar is inserted and connected to the connection terminal of the connection terminal portion, and the opening edge portion of the long hole is sandwiched between the locking claw and the opposing surface, and the mounting member is fixed to the cabinet.

  However, in the above-mentioned Patent Document 1, in order to attach the branch breaker to the cabinet, it is necessary to attach the connection terminal part and the attachment part to the branch breaker, and therefore the work of attaching the branch breaker is troublesome. When attaching the attachment member to the branch breaker, there is a risk of incorrect attachment. In such a case, when trying to install the branch breaker to the cabinet, not only the mounting part is not fixed to the cabinet, but also the conductive bar is not sufficiently inserted into the connection terminal of the connection terminal part (the amount of insertion is insufficient), As a result, the construction state of the branch breaker deteriorated, and problems such as poor connection of the branch breaker may occur.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a distribution board that can prevent a connection failure of a branch breaker.

  In order to solve the above-described problem, in the invention of claim 1, a main branch breaker, a branch connection portion having a plurality of long plate-like conductive bars connected to the secondary side of the main breaker, and a branch connection portion The branch breaker connected to the conductive bar is housed in a cabinet, the branch connection portion includes a mounting table having a mounting surface on which the branch breaker is placed, and the plurality of conductive bars are mounted on the mounting table. The branch breaker is arranged in front of the surface so that the length directions are aligned and parallel to each other, and the branch breaker includes a primary side connection portion into which the conductive bar is inserted and connected from the direction along the width direction of the conductive bar. And a guide means for moving the branch breaker mounted on the mounting table in a direction along the width direction of the conductive bar, and a fixing means for fixing the branch breaker to the mounting table. , With mounting surface in branch breaker In the direction along the width direction of the conductive bar, the protruding portion formed on one of the facing surface and the mounting surface, and the protruding portion formed on the other of the facing surface and the mounting surface. The fixing means includes a fitting protrusion provided on one of the protruding portion and the inner surface of the void portion, and a protruding portion and an inner surface of the void portion. The conductive bar for the primary side connecting portion of the branch breaker is provided on the other side, and the branch breaker is moved to the conductive bar side in the direction along the width direction of the conductive bar in a state where the protruding portion is inserted into the void portion. When the amount of insertion reaches a specified amount, it is constituted by a fitting protrusion and a fitting recess that is unevenly fitted.

  According to the first aspect of the present invention, the branch breaker is moved to the conductive bar side in the direction along the width direction of the conductive bar in a state in which the protruding portion is inserted into the void portion, and the primary breaker connection portion with respect to the primary connection portion of the branch breaker When the insertion amount of the conductive bar reaches the specified amount, the fitting protrusion and the fitting recess are unevenly fitted and the branch breaker is fixed to the mounting table. Unlike the conventional example, the branch breaker is mounted. Since it is not necessary to use a separate member such as a mounting member for fixing to the pedestal, there is no contact failure of the branch breaker due to erroneous mounting of the mounting member to the branch breaker. It is possible to reliably carry out and prevent connection failure of the branch breaker, and since the branch breaker is fixed to the mounting table by the fixing means, the branch breaker is detached from the mounting table and removed from the cabinet. It can be prevented from being dropped. In addition, it is possible to prevent the conductive bar from being excessively inserted into the primary connection portion of the branch breaker. For example, the conductive bar comes into contact with the body of the branch breaker, and heat generated in the conductive bar is transferred to the body. It is possible to prevent problems such as heating.

  According to a second aspect of the present invention, in the first aspect of the present invention, the branch connection portion sandwiches at least a part of the branch breaker with the upper placement surface of the upper placement portion in the longitudinal direction of the cabinet. A holding member is provided.

  According to invention of Claim 2, it can prevent reliably that a branch breaker falls out of a cabinet.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the projecting portion is formed on the facing surface of the branch breaker and has a claw portion projecting toward the side where the primary side connecting portion is provided. The void portion is formed on the mounting surface of the mounting table, the fitting protrusion is formed by an opening edge of the void portion, and the fitting recess is formed on the claw portion of the protruding portion and the facing surface. It is characterized by comprising a void formed between the two.

  According to invention of Claim 3, since a branch breaker can be moved in the state which pinched | interposed the opening edge part of the space part between the nail | claw part of the protrusion part, and the opposing surface of a branch breaker, a branch breaker can be moved. The conductive bar can be inserted into the primary side connecting portion while being positioned in the direction along the longitudinal direction of the cabinet, and the conductive bar is bent when the primary side connecting portion and the conductive bar are connected. This can be prevented.

  The present invention has an effect that connection failure of a branch breaker can be prevented.

  A distribution board according to an embodiment of the present invention is a single-phase power source having a voltage line (R phase) to which a predetermined potential (220 V as an example) is applied as a low-voltage distribution line and a neutral line (N phase) grounded. A residential distribution board corresponding to a two-wire distribution system, as shown in FIGS. 2 to 4, a main breaker 1 to which a voltage line (power line) and a neutral line (not shown) are connected, and a main breaker A branch connection portion 2 having a plurality of long-plate-like (two in this embodiment) conductive bars 3 connected to the secondary side of 1 and a plurality connected to the conductive bars 3 of the branch connection portion 2 The number of branch breakers 5 (24 in the illustrated example) is housed in a cabinet 6. In the following description, the vertical direction in FIG. 4 will be described as the front-rear direction of the distribution board, that is, the front-rear direction (thickness direction) of the cabinet 6.

  The main breaker 1 includes a container 1a made of a resin molded product formed of, for example, an insulating resin material (for example, a phenol resin). The container body 1a includes two primary terminal portions 10 for connecting the voltage line and the neutral wire, respectively, and two secondary terminals individually connected to the primary terminal portion 10 via mechanical contacts (not shown). A side terminal portion 11 is provided. The primary side terminal part 10 and the secondary side terminal part 11 consist of screw terminals, for example. In the main breaker 1 in the present embodiment, screw terminals are illustrated as examples of the primary side terminal portion 10 and the secondary side terminal portion 11, but the primary side terminal portion 10 and the secondary side terminal portion 11 are screws. It is not limited to terminals. Moreover, in the following description, in order to distinguish between the two primary side terminal portions 10, the primary side terminal portion 10 to which the voltage line is connected is denoted by reference numeral 10R as necessary, and the primary side terminal portion to which the neutral line is connected. 10 is represented by 10N. Furthermore, for the same reason, as for the two secondary side terminal portions 11, the secondary side terminal portion 11 to which the voltage line is connected is denoted by reference numeral 11 </ b> R as necessary, and the secondary side terminal portion to which the neutral line is connected. 11 is represented by 11N.

  Further, the main breaker 1 has an operation handle 12 for manual operation attached to the body 1a so as to be displaceable (for example, freely rotatable), and an opening / closing mechanism portion (opening / closing mechanism portion) that opens and closes the mechanical contact according to the operation of the operation handle 12 The mechanical contact is released when an overcurrent flows between the primary terminal portion 10R and the secondary terminal portion 11R or between the primary terminal portion 10N and the secondary terminal portion 11N. A tripping device (not shown). As such a main breaker 1, a conventionally well-known one can be adopted, and detailed description thereof is omitted.

  In addition to the two conductive bars 3, the branch connection portion 2 includes a mounting table 4 made of a conductive material (for example, a metal material such as iron or aluminum) on which the main breaker 1 and the branch breaker 2 are mounted (fixed).

  The conductive bar 3 is formed of a metal material (for example, a metal material having good conductivity such as copper). The two conductive bars 3 are both formed with the same width and thickness. Here, the width dimension of the conductive bar 3 is set to such a size that a primary side connection portion 51 (to be described later) of the branch breaker 5 can be connected from both sides in the width direction. Further, the length of the conductive bar 3 is set to such a length that a plurality of (12 in the illustrated example) branch breakers 5 can be arranged along the width direction of the branch breaker 5 (the left-right direction in FIG. 2). .

  In the distribution board of the present embodiment, the conductive bar 3 is electrically connected to the secondary side (secondary terminal portion 11) of the main breaker 1 by the feed line 7. Therefore, a terminal portion 3a composed of a screw terminal for connecting the feed wire 7 is formed at one end portion in the length direction of the conductive bar 3 (left end portion in FIG. 2). Accordingly, the feed wire 7 is connected to the conductive bar 3 by the terminal screw T. In the following description, in order to distinguish between the two conductive bars 3, the front conductive bar 3 (upper side in FIG. 4) of the two conductive bars 3 is denoted by reference numeral 3R as necessary. The conductive bar 3 on the side is denoted by 3N.

  As shown in FIG. 4, the mounting table 4 includes a rectangular plate-like base 40 fixed to the cabinet 6. The base 40 is fixed to the cabinet 6 by a fixing screw S1 or the like.

  A base 41 on which the branch breaker 2 is placed is provided on the front surface (upper surface in FIG. 4) side of the base 40. The base part 41 has a rectangular plate-like mounting part 41a on which the branch breaker 2 is placed, and leg parts 41b that are hung rearward from both ends of the mounting part 41a in the short direction (left-right direction in FIG. 4). And a rectangular plate-shaped flange 41c that is formed to protrude outward from the tip of the leg 41b. A screw insertion hole (not shown) for the fixing screw S2 that fixes the base portion 41 to the base 40 is provided in the flange portion 41c in the thickness direction (vertical direction in FIG. 4). The base 40 has a screw hole (not shown) through which the fixing screw S2 is screwed, and the fixing screw S2 through which the screw insertion hole of the flange 41c is inserted is screwed into the screw hole of the base 40. Thus, the base portion 41 is coupled to the base 40. Here, the base 41 is disposed on one end side in the longitudinal direction of the base 40 (right end side in FIG. 2). Thereby, a space for arranging the main breaker 1 is secured on the other end side in the longitudinal direction of the base 40 (left end side in FIG. 2).

  The front surface of the mounting portion 41a is formed in a flat surface shape, and the front surface is a mounting surface on which the branch breaker 5 is placed. Further, the dimension of the mounting portion 41a in the short direction (vertical direction in FIG. 2) is set to such a size that two branch breakers 5 can be arranged in the length direction, and the longitudinal direction (left and right in FIG. 2). The dimension of (direction) is set larger than the dimension of the conductive bar 3 in the length direction. The first support post 42 and the second support post 43 are respectively attached to both sides of the mounting portion 41a in the longitudinal direction (left and right direction in FIG. 2). The first support post 42 and the second support post 43 are arranged in a straight line in the direction along the longitudinal direction of the placement portion 41a so that the center portion of the placement portion 41a in the short direction (vertical direction in FIG. 2) Is provided.

  The first support post 42 supports one end portion in the length direction of the conductive bar 3 (left end portion in FIG. 2), and the second support post 43 has the other end portion in the length direction of the conductive bar 3 (FIG. 2). The right end of the). The first support post 42 and the second support post 43 are resin molded products formed of, for example, an insulating resin material. That is, since the first support post 42 and the second support post 43 are each made of an insulating material, the conductive bar 3 and the base portion 41 are insulated from each other.

  As shown in FIGS. 2 and 4, the first support post 42 includes a prismatic first support portion 420 and a second support portion that is lower in height (small in the longitudinal direction) than the first support portion 420. 421 are integrally provided. The first support portion 420 is used for fixing the front conductive bar 3R, and the second support portion 421 is used for fixing the rear conductive bar 3N. The second support part 421 is formed to protrude from the outer surface of the first support part 420. The rear surface of the second support part 421 and the rear surface of the first support part 420 are located on the same plane. Therefore, the front surface of the second support part 421 is located behind the front surface of the first support part 420. Further, the front surface of the first support part 420 and the front surface of the second support part 421 are formed in parallel to each other.

  A screw hole (not shown) into which the terminal screw T is screwed and a screw hole (not shown) of a fixing screw S3 for fixing the conductive bar 3 are formed on the front surface of the first support part 420. In addition, the first support portion 420 is formed with a clearance groove portion (not shown) for preventing interference with the conductive bar 3N fixed to the second support portion 421. A width dimension (distance between the inner side surfaces in the front-rear direction) of the relief groove is formed larger than the thickness of the conductive bar 3, and the inner bottom surface (the normal direction is a surface along the front direction and the conductive bar 3 is mounted). The surface to be placed is located on the same plane as the front surface of the second support part 420.

  On the front surface of the second support portion 421, similarly to the first support portion 420, a screw hole (not shown) into which the terminal screw T is screwed and a screw hole of a fixing screw S 3 for fixing the conductive bar 3 (see FIG. (Not shown). When the conductive bar 3N is fixed to the second support portion 421, a part of the conductive bar 3N is disposed in the escape groove portion of the first support portion 420.

  In addition, the flange portions 422 are formed so as to protrude from both lateral surfaces of the first support post 42 in the short direction. Each flange portion 422 has an insertion hole (not shown) for the fixing screw S4, and the fixing screw S4 through which the insertion hole is inserted is screwed into a screw hole (not shown) formed in the base portion 41. As a result, the first support post 42 is fixed to the base 41. When fixing the first support post 42 to the pedestal portion 41, the longitudinal direction of the first support post 42 (the direction in which the first support portion 420 and the second support portion 421 are aligned) runs along the longitudinal direction of the pedestal portion 41. Make it.

  As shown in FIG. 2, the second support post 43 includes a prismatic support portion 430. On both sides of the support portion 430 (both sides in the vertical direction in FIG. 2), flange portions 431 are formed to project. Each flange portion 431 has an insertion hole (not shown) for the fixing screw S4, and the fixing screw S4 through which the insertion hole is inserted is screwed into a screw hole (not shown) formed in the base portion 41. As a result, the second support post 43 is fixed to the base portion 41. In the support portion 430, a first groove portion (not shown) into which the other end portion in the length direction of the conductive bar 3R is inserted, and a second groove portion (into the other end portion in the length direction of the conductive bar 3N) ( (Not shown). Here, the inner bottom surface of the first groove portion (the surface in which the normal direction is along the front direction and the surface on which the conductive bar 3 is placed) is located on the same plane as the front surface of the first support portion 420, An inner bottom surface of the second groove portion (a surface in which the normal direction is along the front direction and the conductive bar 3 is placed) is located on the same plane as the front surface of the second support portion 421.

  The conductive bar 3 </ b> R has one end in the length direction placed on the first support portion 420 and the other end in the length direction is inserted into the first groove portion of the second support post 43, thereby 2 between the support posts 43. The conductive bar 3N has one end in the length direction placed on the second support portion 421 and the other end in the length direction is inserted into the second groove portion of the second support post 43, thereby 2 between the support posts 43. Each conductive bar 3 is fixed to the first support post 42 by a fixing screw S3.

  In this way, by laying each conductive bar 3 between the first support post 42 and the second support post 43, the two conductive bars 3 can be attached to the mounting table 4 as shown in FIGS. 2 to 4. In the forward direction, the lengthwise directions of the cabinets 6 are aligned and overlapped with each other in the front-rear direction of the cabinet 6 so as to be parallel to each other in the front-rear direction of the cabinet 6. In addition, the conductive bar 3 is positioned in front of the central portion in the short direction of the placement portion 41a in a state where the length direction is along the longitudinal direction of the placement portion 41a.

  In the branch connection portion 2 configured as described above, as shown in FIGS. 2 and 4, twelve branch breakers 5 are placed on both sides in the width direction of the conductive bar 3, so that a total of 24 branch breakers 5 are provided. Fixed to the branch connection 2.

  By the way, in the distribution board of this embodiment, the conductive bar 3R is connected to the secondary side terminal portion 11R of the main breaker 1 by the feed line 7, and the conductive bar 3N is connected to the secondary side terminal of the main breaker 1 by the feed line 7. Connected to the unit 11N. In the present embodiment, since the conductive bar 3N is positioned behind the conductive bar 3R, the conductive bar 3N positioned at the rearmost among the plurality of conductive bars 3 becomes the conductive bar 3 for neutral wire, and the potential is It becomes 0V. Further, as shown in FIG. 2, the terminal portion 3a of the conductive bar 3N on the rear side of the two conductive bars 3 is disposed at a position that does not overlap with the terminal portion 3a of the immediately preceding conductive bar 3R in the front-rear direction.

  As shown in FIG. 1, the branch breaker 5 includes a container 50 made of a resin molded product formed of an insulating resin material (for example, a phenol resin). The container 50 has a rectangular parallelepiped shape in which the dimensions become smaller in the order of the length direction (left-right direction in FIG. 1), height (front-rear) direction (up-down direction in FIG. 1), and width direction (normal direction of the paper in FIG. 1). belongs to.

  Two slits 50a and 50b into which the conductive bar 3 can be inserted individually are formed on one side surface in the length direction of the container body 50 (the right side surface in FIG. 1). The two slits 50a and 50b are separated in the height direction (vertical direction in FIG. 1) of the container body 50 by the interval between the conductive bars 3 and the copper interval. The container body 50 houses the above-described primary side connecting portion 51 that holds and holds the conductive bar 3 inserted into the slits 50a and 50b. The primary side connecting portion 51 is composed of a blade holder having a pair of arm portions 51 a that are contact-connected to one surface (front surface) and the other surface (rear surface) in the thickness direction of the conductive bar 3. The arm portion 51a is bent in a substantially S shape from an elastic metal plate. The pair of arm portions 51 a are arranged to face each other in a mirror image relationship, and one end side thereof (the right end side in FIG. 1) is used for contact connection with the conductive bar 3.

  Therefore, by inserting the conductive bars 3R and 3N into the two slits 50a and 50b of the branch breaker 5 from the direction along the width direction (left and right direction in FIG. 1), the conductive bars 3R and 3N are inserted into the slits 50a. , 50b between the pair of arms 51a. That is, the conductive bar 3 is plugged into the primary side connecting portion 51 (plug-in connection). As described above, the branch breaker 5 includes the primary side connection portion 51 that is connected to the conductive bar 3 from the direction along the width direction of the conductive bar 3.

  On the other side surface in the length direction of the vessel body 50 (left side surface in FIG. 1), a secondary side connection portion 52 for connecting a load or the like is provided. The secondary side connection part 52 is, for example, a quick connection terminal for holding an electric wire inserted into the vessel 50 from an electric wire insertion hole (not shown) for inserting an electric wire (not shown) into the vessel 50. It is comprised by the electric wire connection terminal (not shown). The secondary side connecting portion 52 can employ a conventionally well-known configuration and will not be described in detail.

  The vessel body 50 of the branch breaker 5 includes a primary side connection portion 51 and a secondary side connection portion 52. The secondary side connection part 52 is connected to the primary side connection part 51 via opening / closing means (not shown) such as a mechanical contact.

  Further, the branch breaker 5 is provided with an operation handle 53 for manual operation attached to the body 50 so as to be freely displaceable (for example, freely rotatable), and opens and closes the opening / closing means according to the operation of the operation handle 53. And an opening / closing mechanism (not shown) for releasing and a tripping device (not shown) for releasing the opening / closing means when an overcurrent flows between the primary side connecting part 51 and the secondary side connecting part 52. Stored. As these opening / closing mechanism and tripping device, conventionally known ones can be adopted, and detailed description thereof will be omitted.

  A projecting portion 54 is formed on the bottom surface of the branch breaker 5, that is, the surface facing the mounting surface of the mounting table 4 (the surface in contact with the mounting table 4). Accordingly, a void portion 41d into which the protruding portion 54 is inserted opens on the front surface (mounting surface) of the mounting portion 41a. A plurality (24 in this embodiment) of the space portions 41d are provided corresponding to each of a plurality (24 in this embodiment) of the branch breakers 5. For example, in the mounting portion 41a in the present embodiment, twelve void portions 41d are formed on both sides in the short direction of the mounting portion 41a along the longitudinal direction of the mounting portion 41a.

  The void portion 41d is a rectangular hole whose longitudinal direction (length direction) is the direction along the width direction of the conductive bar 3, and the dimension in the width direction (short direction) is the dimension of the protrusion 54. It is formed slightly larger than the dimension in the width direction (the normal direction of the paper surface in FIG. 1). Therefore, the protruding portion 54 is inserted into the void portion 41d so as to be movable in the direction along the width direction of the conductive bar 3 (the left-right direction in FIG. 1). The projecting portion 54 and the space portion 41 d constitute guide means for moving the branch breaker 5 mounted on the mounting table 4 in a direction along the width direction of the conductive bar 3.

  By the way, the protruding portion 54 is formed in an L shape having a claw portion 54a protruding toward the side where the primary side connecting portion 51 is provided, that is, one end side in the length direction of the container body 50 (the right end side in FIG. 1). The The dimension of the gap between the claw portion 54a and the bottom surface of the container body 50 is set to about the thickness of the placement portion 41a. Therefore, when the projecting portion 54 of the branch breaker 5 is inserted into the void portion 41d and the branch breaker 5 is moved (slidably moved) toward the conductive bar 3 in the direction along the width direction of the conductive bar 3, the void portion The opening edge portion 41e of 41d enters between the claw portion 54a and the container body 50 and is sandwiched between the claw portion 54a and the container body 50, whereby the branch breaker 5 is fixed to the mounting table 4. That is, a branch breaker is formed by a fitting projection formed by the opening edge portion 41e of the space portion 41d and a fitting concave portion formed by a space formed between the claw portion 54a and the bottom surface (the above-described facing surface) of the container body 50. A fixing means for fixing 5 to the mounting table 4 is configured.

  Here, when the opening edge portion of the void portion 41d is completely sandwiched between the claw portion 54a and the container body 50 (that is, the fitting protrusion in the direction along the width direction of the conductive bar 3). Is abutting on the inner surface of the fitting recess, and the fitting protrusion and the fitting recess are in a concavo-convex fitting), the amount of insertion of the conductive bar 3 with respect to the primary side connecting portion 51 of the branch breaker 5 is When the specified amount is reached. The specified amount is, for example, an insertion amount of the conductive bar 3 with respect to the primary side connection portion 51 when the conductive contact between the primary side connection portion 51 and the conductive bar 3 is reliably performed.

  That is, the branch breaker 5 is moved to the conductive bar 3 side in the direction along the width direction of the conductive bar 3 in a state where the protruding portion 54 is inserted into the void portion 41d, and the primary breaker 51 is connected to the primary connection portion 51 of the branch breaker 5. When the insertion amount of the conductive bar 3 reaches the specified amount, the fitting protrusion and the fitting recess are unevenly fitted. Note that the timing can be set by adjusting the positional relationship between the position of the void portion 41d and the conductive bar 3 or the like.

  In the distribution board of this embodiment, after inserting the protruding portion 54 of the branch breaker 5 into the hole 41d of the mounting table 4, the branch breaker 5 is moved to the conductive bar 3 side (direction along the width direction of the conductive bar 3). The branch breaker 5 is connected to the conductive bar 3 by inserting the conductive bars 3R and 3N into the two slits 50a and 50b of the branch breaker 5, respectively. When the primary side connection portion 51 of the branch breaker 3 is connected to the conductive bar 3, the edge portion of the engagement hole 41 d is held between the projecting piece 54 a and the container body 50. Therefore, the branch breaker 5 is fixed to the branch connection part 2 by the primary side connection part 51 and the protrusion part 54. Further, in the distribution board according to the present embodiment, the branch breaker 5 is electrically conductive in a state where the opening edge 41e of the void portion 41d is sandwiched between the claw portion 54a of the projecting portion 54 and the facing surface of the branch breaker 5. Since the branch breaker 5 is positioned in the direction along the front-rear direction of the cabinet 6 (that is, the direction along the thickness direction of the conductive bar 3), the primary side connection portion 51 is electrically conductive. The bar 3 can be inserted, and when connecting the primary side connecting portion 51 and the conductive bar 3, it is possible to suppress the load from being applied to the conductive bar 3 from the thickness direction. It is possible to prevent the conductive bar 3 from being bent by a heavy load.

  In addition to the above configuration, the branch connection portion 2 is provided with a holding member 44 that holds the branch breaker 5 on the mounting table 4. The holding member 44 is made of, for example, a resin molded product formed in a long plate shape from an insulating resin material. The dimension of the holding member 44 in the longitudinal direction (left and right direction in FIG. 2) is set to about three times the dimension of the branch breaker 5 in the width direction (left and right direction in FIG. 2). In the holding member 44, three locking claws 44a are formed at equal intervals along the longitudinal direction. The locking claw 44 a protrudes in the direction along the short direction of the holding member 44. A screw insertion hole (not shown) for the fixing screw S5 is opened at the center of the holding member 44. A screw hole (not shown) for the fixing screw S5 is formed in the mounting portion 41a, and the holding member 44 is mounted by screwing the fixing screw S5 inserted through the screw insertion hole of the holding member 44 into the screw hole. It is fixed to the table 4.

  On the other hand, a locking groove 55 into which the locking claw 44a is inserted is formed on the other side surface in the length direction of the branch breaker 5 (the left side surface in FIG. 1). The holding member 44 is fixed to the mounting table 4 with a fixing screw S5 in a state where the three locking claws 44a are inserted into the locking groove portions 55 of the branch breaker 5, respectively. In a state where the holding member 44 is fixed to the mounting table 4, the distance between the mounting surface of the mounting table 4 and the rear surface of the locking claw 44 a is the same as the inner surface of the locking groove 55 in the device body 50 of the branch breaker 5 and the device body 50. It is set to be slightly shorter than the distance between the bottom of the. Therefore, in the front-rear direction of the cabinet 6, the portion P between the inner surface of the locking groove 55 in the container body 50 of the branch breaker 5 and the bottom surface of the container body 50 is located between the locking claw 44 a of the holding member 44 and the mounting table 4. It is pinched between the mounting surface. As described above, since the three retaining claws 44 a are formed on the holding member 44, the three branch breakers 5 can be held by one holding member 44.

  The cabinet 6 includes a rectangular parallelepiped box-like box 60 whose front surface (upper surface in FIG. 4) is opened. As shown in FIGS. 2 to 4, the main breaker 1, the branch connection portion 2, and a plurality (24 in the illustrated example) of branch breakers 5 are accommodated in the box 60. As shown in FIGS. 3 and 4, an inner lid 61 is attached to the box 60. The inner lid 61 is attached to the front surface of the box 60 so as to cover the charged portions of the main breaker 1, the branch connection portion 2, and the branch breaker 5. The inner lid 61 is formed with a window hole (not shown) for exposing the operation handle 12 of the main breaker 1, the operation handle 53 of the branch breaker 5, and the like. Thus, even when the inner lid 61 is attached to the box 60, the operation handle 12 of the main breaker 1 and the operation handle 53 of the branch breaker 5 can be operated. A door 62 is attached to the front side of the inner lid 61 so as to be freely opened and closed. The door 62 is formed in a plate shape having a size capable of closing the front opening of the box 60.

  As described above, according to the distribution board of the present embodiment, the branch breaker 5 is placed on the conductive bar 3 side in the direction along the width direction of the conductive bar 3 with the protruding portion 54 inserted into the void portion 41d. When the amount of insertion of the conductive bar 3 with respect to the primary side connection portion 51 of the branch breaker 5 reaches a specified amount by moving, the fitting protrusion (opening edge portion 41e of the space portion 41d) and the fitting Since the concave portion (the space portion between the claw portion 54a of the projecting portion 54 and the container body 50) is unevenly fitted and the branch breaker 5 is fixed to the mounting table 4, the branch breaker 5 is different from the conventional example. Since it is not necessary to use a separate member such as an attachment member for fixing to the mounting table 4, the branch breaker 5 does not have poor contact due to the attachment member being erroneously attached to the branch breaker 5. 5 can be connected securely It is possible to prevent the branch breakers 5 connection failure. In addition, since the insertion amount of the conductive bar 3 with respect to the primary side connection portion 51 can be stopped at the specified amount, it is possible to prevent the conductive bar 3 from being inserted too much into the primary side connection portion 51 of the branch breaker 5. For example, the conductive bar 3 can be prevented from coming into contact with the vessel 50 of the branch breaker 5 by inserting the conductive bar 3 too much into the primary side connection portion 51. As a result, it is possible to prevent a problem that the heat generated in the conductive bar 3 is transferred from the conductive bar 3 to the container body 50 and the container body 50 is melted by the heat.

  Further, since the branch breaker 5 is fixed to the mounting table 4 by the fixing means including the fitting protrusion and the fitting recess, the branch breaker 5 is prevented from coming off the mounting table 4 and falling off from the cabinet 6. it can. Moreover, since the operation | work which attaches a connection terminal part and an attachment part like the said prior art example is unnecessary, the attachment work to the cabinet 6 of the branch breaker 5 can be performed easily, and the number of parts which comprise a distribution board can be reduced. Since the number can be reduced, the manufacturing cost can be reduced.

  Further, the branch connection portion 2 is a part of the branch breaker 5 between the mounting surface of the mounting portion 41a in the front-rear direction of the cabinet 6 (the inner surface of the locking groove portion 55 and the device in the body 50 of the branch breaker 5). Since the holding member 44 that holds the part P) between the bottom surface of the body 50 is provided, the branch breaker 5 can be firmly fixed to the mounting table 4, and the branch breaker 5 falls off the cabinet 6. It can be surely prevented.

  Note that the distribution board of this embodiment is merely one embodiment of the present invention, and is not intended to limit the present invention to the distribution board of the present embodiment, and does not depart from the scope of the present invention. Of course, changes can be made. For example, the projecting portion 54 constituting the guide means may be provided on the mounting table 4 side, and the void portion 41d may be provided on the branch breaker 5 side. That is, the guide means includes the protruding portion 54 formed on one of the surface facing the mounting surface of the branch breaker 5 and the mounting surface of the mounting table 4, and the surface facing the branch breaker 5 and the mounting table 4. What is necessary is just to be comprised with the space part 41d formed in either one of the mounting surfaces. In addition, the void portion 41d in the present embodiment includes a hole penetrating the placement portion 41a, but the void portion 41d may be a recess into which the protruding portion 54 can be inserted. Further, the fixing means is not limited to the above configuration, and any of the fitting protrusion provided on one of the protrusion 54 and the inner surface of the void portion 41d, and any of the protrusion 54 and the inner surface of the void portion 41d. The branch breaker 5 is moved to the conductive bar 3 side in the direction along the width direction of the conductive bar 3 with the protruding portion 54 inserted into the void portion 41d. What is necessary is just to be comprised by the fitting protrusion and the fitting recessed part which carries out an uneven | corrugated fitting, when the insertion amount of the electrically-conductive bar 3 with respect to the connection part 51 reaches a regulation amount. Further, the holding member 44 is not limited to the one that holds the three branch breakers 5, and may be formed in a shape that can hold more branch breakers 5, or holds only one branch breaker 5. You may do. Further, in the present embodiment, the branch breaker 5 is provided with the locking groove portion 55 into which the locking claw 44a of the holding member 44 is inserted, but is locked to the locking claw 44a instead of the locking groove portion 55. Protrusions may be provided. Furthermore, although the distribution board of this embodiment corresponds to a single-phase two-wire low-voltage distribution line, the design may be changed to correspond to a single-phase three-wire low-voltage distribution line.

It is a fragmentary sectional view of the distribution board of one embodiment of the present invention. It is a front view which shows the internal structure of the electricity distribution panel same as the above. It is sectional drawing in the transversal direction of a divided electric field same as the above. It is sectional drawing in the longitudinal direction of a distribution board same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Master breaker 2 Branch connection part 3 Conductive bar 4 Mounting stand 5 Branch breaker 41d Empty part 41e Opening edge part (fitting protrusion)
44 Holding member 50 Body 51 Primary side connection part 54 Projection part 54a Claw part

Claims (3)

A main body breaker, a branch connection portion having a plurality of long plate-like conductive bars connected to the secondary side of the main breaker, and a branch breaker connected to the conductive bars of the branch connection portion are housed in a cabinet. And
The branch connection portion includes a mounting table having a mounting surface on which the branch breaker is placed.
The plurality of conductive bars are arranged in front of the mounting surface of the mounting table so that the respective length directions are aligned and parallel to each other,
The branch breaker is a distribution board having a primary side connection portion into which the conductive bar is inserted and connected from the direction along the width direction of the conductive bar,
Guide means for moving the branch breaker mounted on the mounting table in a direction along the width direction of the conductive bar;
Fixing means for fixing the branch breaker to the mounting table,
The guide means includes a protrusion formed on one of the surface facing the mounting surface of the branch breaker and the mounting surface on the mounting table, and a protrusion formed on the other of the facing surface and the mounting surface. The portion is composed of a void portion inserted movably in a direction along the width direction of the conductive bar,
The fixing means is provided on the other of the projecting portion and the inner surface of the void portion, and on the other of the projecting portion and the inner surface of the void portion. When the branch breaker is moved to the conductive bar side in the direction along the width direction of the conductive bar in the inserted state, the insertion amount of the conductive bar with respect to the primary connection portion of the branch breaker reaches the specified amount. A distribution board comprising a mating protrusion and a fitting recess for engaging with the recesses.   The said branch connection part is equipped with the holding member which clamps at least one part of the said branch breaker between the said mounting surface of the said mounting part in the front-back direction of the said cabinet. The distribution board according to 1. The protruding portion is formed on the facing surface of the branch breaker, and has a claw portion protruding toward the side where the primary side connecting portion is provided,
The void portion is formed on the mounting surface of the mounting table,
The fitting protrusion consists of an opening edge of the void portion,
The distribution board according to claim 1 or 2, wherein the fitting recess comprises a space formed between the claw portion of the protruding portion and the facing surface.

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