JP4746513B2 - Distribution board - Google Patents

Description

  The present invention relates to a distribution board.

  Conventionally, there has been a distribution board A in which a plurality of branch breakers 3 are connected to a main bar 7 via screws 23 as shown in FIG. This distribution board A is provided with a substantially box-shaped board body 1 having an open front side, and a lid 2 is attached to the front side. In addition, a main breaker 8 and a plurality (two in FIG. 10) of branch breakers 3 are arranged inside the board body 1. The main breaker 8 is fixed to the mounting base 10, and each output terminal 8 c is connected to a plurality (three in FIG. 10) of the main bar 7 via the conductive member 13. Each branch breaker 3 is fixed to the mounting base 21, and each input terminal 3 b is connected to the three main bars 7 through conductive members 22 a to 22 c having different lengths. The conductive members 22 a to 22 c and the main bar 7 are connected to each other through screws 23.

  In this distribution board A, each branch breaker 3 is connected to the trunk bar 7 via the conductive members 22a to 22c, and each conductive member 22a to 22c and each trunk bar 7 are connected via the screw 23. Therefore, it is necessary to provide a screw insertion hole (not shown) for inserting the screw 23 into the main bar 7. Moreover, in order to connect each electrically-conductive member 22a-22c and each trunk bar 7, it is necessary to fasten the screw | thread 23, There existed a problem that a process increased and workability | operativity was bad.

Therefore, in order to improve workability, a distribution board in which a plurality of branch breakers are connected to a main bar by a plug-in method has been proposed (for example, see Patent Document 1). This distribution board is provided with a substantially box-shaped board body whose front side is open, and a main breaker and a plurality of branch breakers are arranged inside the board body. Further, a plurality of trunk bars are arranged inside the board body so that the width direction thereof is the depth direction of the board body, and each trunk bar is connected to each output terminal of the main breaker. Furthermore, each branch breaker is attached to a plug-in adapter having a plurality of plugs for electrically connecting between each input terminal of the branch breaker and the corresponding trunk bar on the back side. By pressing from the front side of the main body, each plug is inserted and connected to the corresponding main bar, and each input terminal of the branch breaker and the corresponding main bar are electrically connected via the plug.
Japanese Patent Laying-Open No. 2005-158420 (pages 3 to 4 and FIGS. 1 to 10)

  In the distribution board shown in Patent Document 1 described above, the trunk bar is arranged so that the width direction is the depth direction of the board body. Therefore, when the power receiving capacity is large, the width dimension of the trunk bar is large. Thus, there is a problem that the depth dimension of the board body is increased.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a distribution board with improved workability and reduced depth.

  The invention according to claim 1 is arranged on the front side of the plurality of main bars, the plurality of main bars being arranged so that the thickness direction is the depth direction of the box and extending in a direction perpendicular to the depth direction of the box. And a plurality of first plug-in connection members that are respectively connected to a plurality of input terminals of the branch breaker and electrically connect between each input terminal and the corresponding main bar. The main bars are arranged at the same height in the depth direction of the box, and the receiving blades that are inserted and connected to the corresponding main bars by sliding the branch breakers along the arrangement direction of the main bars. Each plug-in connection member is provided.

  The invention of claim 2 is characterized in that a bent portion is provided by bending an end portion on the opposite side to one end side to which the receiving blade in the width direction of the main bar is inserted and connected. To do.

  The invention of claim 3 includes a plurality of second plug-in connection members that are respectively connected to a plurality of input terminals of another branch breaker and electrically connect between each input terminal and the corresponding main bar, The bent part protrudes forward from the opposite end of the main bar, and a receiving blade is inserted and connected to the corresponding bent part of the main bar by pressing another branch breaker from the front side of the box Is provided for each of the second plug-in connecting members.

  According to a fourth aspect of the present invention, there is provided an insulating breaker mounting in which a plurality of first plug-in connecting members are attached, and insertion holes through which the tip end side of the tool can be inserted are provided at both end sides with a plurality of main bars interposed therebetween. The base is attached to the back side of the branch breaker, and has a mounting surface along the arrangement direction of the main bars on both sides of the plurality of main bars, and a breaker mounting base is on the front side of the mounting surface A fixing member to be placed is provided, and the fixing member is provided with an abutting portion that makes contact with the distal end side of the tool inserted through the insertion hole in a state where the breaker mounting base is placed on the placing surface, and forms a fulcrum of leverage. It is characterized by that.

  The invention according to claim 5 is a state in which fixing means for fixing the breaker mounting base at fixed intervals along the extending direction of the main bar is provided on the mounting surface, and the breaker mounting base is fixed using the fixing means A feature is that a notch portion is provided at a portion overlapping the insertion hole of the breaker mounting base.

  According to the invention of claim 1, the plurality of main bars are disposed so that the thickness direction thereof is the depth direction of the box body, and are disposed at the same height in the depth direction of the box body. There is an effect that the depth dimension of can be reduced. In particular, when the power receiving capacity is increased, the width of the main bar is increased. According to the conventional example, the depth of the box is increased. However, as described above, the branch breaker is slid along the arrangement direction of the main bar. By arranging the main bar so that it can be plugged in, an increase in the depth of the box can be suppressed.

  According to invention of Claim 2, when the width dimension of a main bar becomes large with the increase in receiving capacity, the one end side where the receiving blade of the 1st plug-in connection member in the width direction of a main bar is connected, Since the opposite end is bent in the depth direction of the box, the width of the box can be reduced with respect to the invention of claim 1. Further, since the main bar is not arranged so that the width direction thereof is the depth direction of the box as in the conventional example, the depth of the box can be reduced compared to the conventional example.

  According to the invention of claim 3, by providing the main bar with a bent portion bent to the front side of the box, in the case of the first plug-in connection member, the branch breaker is arranged in the arrangement direction of the main bar. Each receiving blade can be inserted and connected to the corresponding main bar by sliding along, and in the case of the second plug-in connecting member, each receiving blade is pressed by pressing the branch breaker from the front side of the box. Can be inserted and connected to the bent portion of the corresponding main bar, so that the usability is improved. Moreover, since the site | part by which the receiving blade of a 2nd plug-in connection member is inserted and connected by bending a main bar is provided, the depth dimension of a box can be made small with respect to a prior art example. There is also an effect.

  According to the fourth aspect of the present invention, since the abutting portion with which the tip end side of the tool abuts is provided on the fixing member, the tool is inserted into the insertion hole on one side in a state where the breaker mounting base is mounted on the mounting surface of the fixing member. When the force is applied through the tool with the tip side of the tool inserted and the tip side of the tool abutted against the abutting part, the abutting part becomes a lever for the lever and the breaker mounting base slides along the mounting surface. To do. At this time, since the first plug-in connecting member also slides in accordance with the breaker mounting base, there is an effect that each receiving blade can be easily inserted and connected to the corresponding main bar. In addition, if the tool tip is inserted into the insertion hole on the other side and force is applied through the tool with the tool tip in contact with the contact part, the contact part will serve as a fulcrum for mounting the breaker The table slides in the opposite direction along the mounting surface. At this time, since the first plug-in connecting member also slides in accordance with the breaker mounting base, there is an effect that the connection state between each receiving blade and the main bar can be easily released. Therefore, each receiving blade of the first plug-in connection member of the plurality of branch breakers and the corresponding main bar can be easily inserted and removed with a small force, and workability can be improved.

  According to invention of Claim 5, the fixing means for fixing a breaker mounting base at a fixed space | interval along the extending direction of a main bar is provided in the mounting surface of a fixing member, and also using this fixing means With the breaker mounting base fixed, a notch is provided in the part that overlaps the insertion hole of the breaker mounting base, and the tip end side of the tool cannot be inserted unless the insertion hole is aligned with the position of the notch. By aligning the hole with the position of the notch portion, there is an effect that the breaker mounting base can be fixed to the fixing member using the fixing means in a state where the breaker mounting base is accurately positioned. Moreover, since the breaker mounting base can be easily fixed to the fixing member by aligning the insertion hole with the position of the notch, there is an effect that workability can be improved.

(First embodiment)
A first embodiment will be described with reference to FIGS. In the following description, unless otherwise specified, the vertical and horizontal directions are defined in the direction shown in FIG. 4, and the front of FIG. Accordingly, the right side of FIG. 1 is the rear side.

  The distribution board A of the present embodiment is attached to the wall surface so that the vertical direction defined in FIG. 4 is aligned with the vertical direction of the construction surface (for example, a wall surface), as shown in FIG. 1 and FIG. A substantially box-shaped board main body 1 having an open side, a lid 2 attached to the opening of the board main body 1, a main breaker 8 disposed inside the board main body 1 and a plurality (two in FIG. 4). A branch breaker 3, a main breaker 8, and a plurality of (three in FIG. 4) main bars 7 that electrically connect the branch breakers 3 are provided.

  As shown in FIGS. 1 and 4, the panel body 1 is formed in a vertically long, substantially box shape with the front side opened and extending in the vertical direction. A pair of attachment members 9, 9 having a letter shape and extending in the vertical direction of the board body 1 are attached to the board body 1 via bolts 15 protruding from the bottom surface of the board body 1. As shown in FIG. 1, a lid body 2 that pivotably opens and closes the opening is provided at the opening on the front side (left side in FIG. 1) of the panel body 1. Here, the board body 1 and the lid body 2 constitute a box.

  As shown in FIG. 4, each mounting member 9 is provided with a plurality of screw holes 9 a at regular intervals along the vertical direction, and a substantially rectangular plate-shaped mounting base is provided above the mounting members 9, 9. 10 is attached via a screw 17. Further, two horizontally long and substantially rectangular plate-like attachment bases 11 and 11 are attached to the lower position of the attachment base 10 via screws 17 at a predetermined interval. Furthermore, a pair of fixing members 6, 6 extending in the vertical direction are attached between both the mounting bases 11, 11 so as to face each other in the vicinity of the inside of the both mounting members 9, 9.

  As shown in FIGS. 1 and 2, each fixing member 6 has a support piece 6a formed in a substantially L shape, and the tip end side of the support piece 6a is parallel to the mounting base 11 and is bent outward. The mounting piece (mounting surface) 6b is formed. Each mounting piece 6b is provided with a plurality of screw holes 6c at regular intervals along the vertical direction as shown in FIG. 4, and an arcuate shape between the adjacent screw holes 6c, 6c. A notch 6d is provided at the outer edge of each mounting piece 6b. Here, the screw hole 6c and the screw 17 screwed into the screw hole 6c constitute fixing means for fixing the breaker mounting base 4 to be described later. At both ends in the vertical direction of both the fixing members 6, 6, a plurality of (three in FIG. 2) projecting base portions 12 a are formed at a constant interval on the back side (the right side in FIG. 2). Insulating attachment members 12 and 12 provided with are respectively attached via screws 17.

  Next, the main breaker 8 will be described with reference to FIG. The main breaker 8 is formed in a vertically long rectangular parallelepiped shape, and an internal contact (not shown) is turned on / off at the center of the front surface side between each input terminal 8b described later and a corresponding output terminal 8c. A knob 8a for conducting or opening is provided. A plurality (three in FIG. 4) of input terminals 8b and output terminals 8c are provided at both ends in the vertical direction with the knob 8a in between, and each input terminal 8b is connected to a primary power source (not shown). The conductive member 14 is connected to each output terminal 8c and a conductive member 13 connected to the main bar 7 described later. The main breaker 8 is fixed to the mounting base 10 via, for example, screws.

  Here, the main bar 7 will be described. Each main bar 7 is formed in an elongated rectangular plate shape as shown in FIGS. 1, 2, and 4, and the thickness direction is the depth direction of the panel body 1, and the depth direction of the panel body 1 is It arrange | positions so that it may become the same height. Each main bar 7 is arranged in a state where the longitudinal direction thereof is the vertical direction and is provided at a constant interval in the left-right direction, and is connected to each conductive member 13 via a screw 16 on the upper end side. Each is connected. Further, as shown in FIGS. 2 and 4, each main bar 7 is fixed to each projecting portion 12 a, 12 a of both attachment members 12, 12 via screws 17 at both ends in the vertical direction.

  Thus, by disposing the main bar 7 so that the thickness direction thereof is the depth direction of the panel main body 1 and the same height in the depth direction of the panel main body 1, the depth dimension of the panel main body 1 is reduced. In particular, even when the power receiving capacity is increased and the width dimension of the main bar 7 is increased, the depth dimension of the panel body 1 is not increased as in the distribution board A shown in the conventional example. An increase in the depth dimension of the main body 1 can be suppressed.

  Next, the branch breaker 3 will be described. The branch breaker 3 is formed in a substantially rectangular parallelepiped shape as shown in FIGS. 1 to 4, and an input terminal 3 b to be described later is turned on / off at an inner contact (not shown) at a substantially central portion on the front side. A knob 3a for connecting or opening between the corresponding output terminals 3c is provided. In addition, a plurality of (three in FIG. 4) input terminals 3b and output terminals 3c are provided on both ends in the left-right direction with the knob 3a in between, and each input terminal 3b has a plug-in connection member to be described later. (First plug-in connecting members) 25 to 27 are connected to respective output terminals 3c with electric wires (not shown).

  As shown in FIG. 4, the branch breaker 3 is attached to a breaker mounting base 4 having a rectangular shape in plan view. This breaker mounting base 4 has an insulating mounting base 4a that is formed in an L shape in cross section as shown in FIG. 2 and that has protruding pieces integrally provided at both ends in the left-right direction (vertical direction in FIG. 2). As shown in FIG. 4, two horizontally long insertion holes 4 e are provided on both end sides of both protruding pieces. A pair of screw insertion holes 4f and 4f are provided on both sides in the vertical direction with the insertion holes 4e and 4e in between, as shown in FIG. Furthermore, connection pieces 4b to 4d formed using a conductive material are attached to the right side (upper side in FIG. 2) of the mounting base 4a via, for example, screws. Each of the connection pieces 4b to 4d has a connection portion 4g connected to the branch breaker 3 on one end side, and the other end side on the rear surface side (right side in FIG. 2) through an insertion hole 4h provided on the mounting base 4a. It protrudes. In addition, receiving blades 5 formed in a substantially U shape in cross section are attached to the distal end sides of the connecting members 4b to 4d protruding to the rear surface side, and the distal end sides of the receiving blades 5 are spaced from each other. Is bent in a substantially letter shape so as to be slightly narrower than the thickness of the main bar 7. Each receiving blade 5 has a mounting pitch of adjacent receiving blades 5 in the left-right direction (up and down direction in FIG. 1) so that it is the same size as an mounting pitch of adjacent main bars 7 (in FIG. 1). It is disposed so as to be the same height as the main bar 7 in the left-right direction). In addition, between the adjacent connection pieces 4b and 4c and the connection pieces 4c and 4d, as shown in FIG. 3, insulating walls 24 for securing a spatial distance and a creepage distance are provided. Here, the connection pieces 4b to 4d and the receiving blade 5 constitute plug-in connection members 25 to 27, respectively, and the plug-in connection members 25 to 27 and the attachment base 4a constitute the breaker attachment base 4. Yes.

  Here, a method of attaching the branch breaker 3 to the breaker mounting base 4 will be described. First, the branch breaker 3 is moved from the left direction (the lower side in FIG. 1) to adjust the position of each input terminal 3b to the position of each connection portion 4g of the corresponding connection piece 4b-4d. Then, the breaker 3 is fixed to the mounting base 4a via the screws 19, and the screws 18 are fastened to connect the connection portions 4g corresponding to the respective input terminals 3b, whereby the attachment of the branch breaker 3 is completed.

  Further, a method for attaching and removing the breaker mounting base 4 to which the branch breaker 3 is fixed to the fixing member 6 will be described with reference to FIGS. First, when mounting, as shown in FIG. 6 (a), the breaker mounting base 4 is mounted on the mounting pieces 6b and 6b of both fixing members 6 and 6, and one end side of the breaker mounting base 4 (FIG. 6 ( The insertion holes 4e and 4e on the left side of a) are aligned with the notches 6d and 6d of the mounting piece 6b. At this time, each receiving blade 5 is positioned on the right side with respect to the corresponding main bar 7. Next, as shown in FIGS. 5A and 5B, the tip 20a of the tool 20 is inserted into the insertion hole 4e on one end side (left side of FIG. 5A), and the outside (FIG. When a force is applied to the tool 20 toward the left side of b), the abutting portion between the tip 20a and the support piece 6a is supported by the tip 20a coming into contact with the side surface of the support piece 6a of the fixing member 6. Thus, a leftward force is applied to the breaker mounting base 4, and the breaker mounting base 4 slides leftward along the upper surface of the mounting piece 6b. At this time, each receiving blade 5 also slides leftward in accordance with the breaker mounting base 4, so that each receiving blade 5 a is inserted and connected to the corresponding main bar 7, and corresponds to each input terminal 3 b of the branch breaker 3. The main bar 7 is electrically connected to each other. Moreover, as shown in FIG.6 (b), the four insertion holes 4e of the breaker mounting base 4 and the corresponding notch 6d each overlap. When the screw 17 is inserted into the screw insertion hole 4f of the breaker mounting base 4 and screwed into the screw hole 6c of the mounting piece 6b as shown in FIGS. 4 is fixed to both fixing members 6 and 6, and attachment is completed.

  On the contrary, when removing, after removing the screw 17, the tip 20 a of the tool 20 is inserted into the right insertion hole 4 e as shown in FIG. 5 (d), and the outside (the right side in FIG. 5 (e)). When a force is applied to the tool 20 toward the direction, a force opposite to that when the breaker mounting base 4 is attached, that is, a rightward force is applied, and the breaker mounting base 4 slides rightward along the upper surface of the mounting piece 6b. To do. At this time, each receiving blade 5 also slides to the right according to the breaker mounting base 4, so that the connection state between each receiving blade 5a and the corresponding main bar 7 is released. Here, an abutting portion serving as a fulcrum of the lever is configured from a portion of the side surface of the support piece 6 a of each fixing member 6 that abuts on the tip portion 20 a of the tool 20.

  In the distribution board A of the present embodiment, each receiving blade 5 can be easily moved to the corresponding main bar 7 simply by sliding the breaker mounting base 4 along the upper surface of the mounting piece 6b using the principle of lever. And can be easily released. Further, the tip 20a of the tool 20 cannot be inserted into the insertion hole 4e unless the insertion hole 4e of the breaker mounting base 4 is aligned with the position of the notch 6d of the mounting piece 6b. The breaker mounting base 4 can be accurately positioned by matching the position of the portion 6c, and can be easily fixed to both the fixing members 6 and 6. Accordingly, each receiving blade 5 and the corresponding main bar 7 can be easily inserted and removed with a small force, and a plurality of breaker mounting bases 4 can be easily attached, so that workability can be improved.

  In this embodiment, the example in which two branch breakers 3 are used has been described. However, the number of branch breakers 3 to be used is not limited to this embodiment, and may be one or three or more. . Further, the number of main bars 7 to be used is not limited to this embodiment, and may be appropriately designed according to the purpose of use.

(Second Embodiment)
A second embodiment will be described with reference to FIGS. The distribution board A of the present embodiment includes a panel body 1, a lid 2, a main breaker 8, a plurality (two in FIG. 7) branch breakers 3, and a plurality (three in FIG. 7) main bars 7. The other components are the same as those of the first embodiment except that one end in the width direction of each main bar 7 is bent to the front side and the bent portion 7a is provided. Are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIGS. 7 and 8, each main bar 7 is bent by bending the end opposite to the one end into which the receiving blade 5 is inserted, that is, the left end to the front side (upper side in FIG. 8). A curved portion 7a is formed, and is fixed to each projecting portion 12a of the mounting member 12 via screws 17 at both ends in the vertical direction.

  Here, when the width dimension of each main bar 7 increases as the power receiving capacity increases, in the conventional example, it becomes necessary to increase the depth dimension of the panel body 1 as the width dimension of the main bar 7 increases. In the first embodiment, it is necessary to increase the width dimension of the panel body 1 in accordance with the increase in the width dimension of the main bar 7. On the other hand, in this distribution board A, since the left end portion of the main bar 7 is bent to the front side to form a bent portion 7a, the depth dimension of the panel body 1 is made smaller than the conventional example. In addition, the width of the panel body 1 can be made smaller than that of the first embodiment.

  In the distribution board A, the left end portion of the main bar 7 is described as being bent to the front side, but it may be bent to the rear side. The depth dimension can be reduced, and the width dimension of the panel body 1 can be reduced as compared with the first embodiment.

  Moreover, in this embodiment, as shown in FIG. 9, connection piece 4b '-provided with each receiving blade 5 inserted and connected to the bending part 7a of the corresponding main bar 7 from the front side (upper side of FIG. 9). The plug-in connection members (second plug-in connection members) 28 to 30 may be configured by using 4d ′, and the breaker mounting base 4 to which the plug-in connection members 28 to 30 are connected is pressed from the front side. Thus, each receiving blade 5 is inserted and connected to the bent portion 7a of the corresponding main bar 7, and each input terminal 3b of the branch breaker 3 and the corresponding main bar 7 are electrically connected.

  In this distribution board A, each receiving blade 5 can be inserted and connected to the corresponding bent portion 7a of the main bar 7 simply by pressing the breaker mounting base 4 from the front side. The input terminal 3b and the corresponding main bar 7 can be easily electrically connected. Further, even when the breaker mounting 4 described in the first embodiment is used, each receiving blade 5 is attached to the end opposite to the one end where the bent portion 7a in the width direction of the corresponding main bar 7 is provided. Each can be plugged in. Furthermore, since the part to which each receiving blade 5 is inserted and connected is provided by bending one end side in the width direction of the corresponding main bar 7, the depth dimension of the panel body 1 is made smaller than the conventional example. Can do.

  In the present embodiment, the left end of each main bar 7 is bent to the front side to provide a bent portion 7a. However, the right end of each main bar 7 may be bent, Even when the breaker mount 4 described in the embodiment or the breaker mount 4 described in the first embodiment is used, each input terminal 3b of the branch breaker 3 and the corresponding main bar 7 are easily electrically connected. Can be connected to.

It is the top view which fractures | ruptures partially the power distribution board of 1st Embodiment seeing from the lower surface side. It is a partially broken top view which shows the state before attaching a breaker mounting base to the same as the above. (A) is the top view which fractures | ruptures partially the breaker mounting base used for the same seeing from the upper surface side. (B) is the top view which fractures | ruptures partially the breaker mounting base used for the same seeing from the lower surface side. It is a front view which shows the state which removed the cover body same as the above. (A)-(e) is a partially broken state figure which shows the state which attaches a breaker mounting base to a fixing member in the same as the above. (A)-(c) is a state figure which fractures | ruptures partially the state which looked at the state which attaches a breaker mounting base to a fixing member in the same as the front side. It is a front view which shows the state which removed the cover body of the electricity distribution panel of 2nd Embodiment. It is the top view which fractures | ruptures partially the same electricity distribution board seen from the lower surface side. It is a top view which fractures | ruptures partially the other electricity distribution panel same as the above seen from the lower surface side. (A) is a front view which shows the state which removed the cover body of the distribution board of a prior art example. (B) is sectional drawing which looked at the same from the lower surface side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Panel body 2 Cover body 3 Branch breaker 3b Input terminal 4 Breaker mounting base 4b Connection piece 4c Connection piece 4d Connection piece 4e Insertion hole 5 Receiving blade 6 Fixing member 6b Mounting piece (mounting surface)
6c Screw hole 6d Notch portion 7 Main bar 7a Bending portion 25 Plug-in connection member 26 Plug-in connection member 27 Plug-in connection member A Distribution board

Claims (5)

  A plurality of main bars disposed in such a manner that the thickness direction is a depth direction of the box and extending in a direction perpendicular to the depth direction of the box; a branch breaker disposed on the front side of the plurality of main bars; A plurality of first plug-in connection members that are respectively connected to a plurality of input terminals of the branch breaker and electrically connect between the input terminals and the corresponding main bars; The first plug-ins are arranged at the same height in the depth direction of each of the first plug-ins. The receiving blades are inserted and connected to the corresponding main bars by sliding the branch breakers along the arrangement direction of the main bars. A distribution board provided on each of the connection members.   The end portion on the opposite side to the one end side where the receiving blade is inserted and connected in the width direction of the main bar is bent in the depth direction of the box to provide a bent portion. Distribution board.   A plurality of second plug-in connection members that are respectively connected to a plurality of input terminals of another branch breaker and electrically connect each of the input terminals to the corresponding main bar; Each of the receiving blades that are inserted and connected to the bent portion of the corresponding main bar by pressing the other branch breaker from the front side of the box. The distribution board according to claim 2, wherein the distribution board is provided on each of the second plug-in connection members.   A plurality of the first plug-in connecting members are attached, and an insulating breaker mounting base provided with insertion holes through which the tip end side of the tool can be inserted at both end sides with the plurality of main bars interposed therebetween is a branch breaker. It is attached to the back side, has a mounting surface along the arrangement direction of the main bars on both sides of the plurality of main bars, and the breaker mounting base is mounted on the front side of the mounting surface A fixing member that contacts the tip end side of the tool inserted through the insertion hole in a state where the breaker mounting base is placed on the mounting surface, and a contact portion that forms a fulcrum is provided on the fixing member. The distribution board according to any one of claims 1 to 3, wherein the distribution board is provided.   The mounting surface is provided with fixing means for fixing the breaker mounting base at regular intervals along the extending direction of the main bar, and the breaker mounting base is fixed in a state where the breaker mounting base is fixed using the fixing means. The distribution board according to claim 4, wherein a notch portion is provided in a portion overlapping the insertion hole.

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