JP6178996B2 - Plug-in unit used for plug-in distribution boards - Google Patents

Description

  The present invention relates to a plug-in unit used for a plug-in type distribution board in which an electric device such as a breaker is plug-in connected to a main bar.

  As disclosed in Patent Document 1, a plug-in type having a structure in which a plurality of trunk bars installed perpendicular to the board surface is provided, and breakers can be inserted and removed from these trunk bars easily. Plug-in units used in distribution boards are widely used because they are easy to add and remove breakers and have excellent workability.

  As shown in FIG. 7, when the electric wire 22 is connected to the load-side terminal of the breaker 21 and wired downward of the housing 23, a predetermined bending radius is used in order to avoid damage and performance deterioration due to bending of the electric wire. (R) needs to be secured.

  Since the bending radius (R) increases in proportion to the thickness of the electric wire, when the breaker capacity increases and the electric wire becomes thicker, it is necessary to widen the lateral width of the housing to ensure wiring space. There was a problem that the case became larger and could not meet the demand for space saving.

  On the other hand, as shown in FIG. 8, a technique is known in which a lead bar 24 bent into an L shape is connected to a load-side terminal of a breaker 21 and an electric wire 22 is connected via the lead bar.

  By connecting the electric wire 22 via the lead bar 24, it is not necessary to bend the electric wire 22 itself, and the above problem can be avoided. However, when the breaker capacity increases and the electric wire 22 becomes thicker and heavier, the lead bar is deformed by the load of the electric wire, the load on the terminal portion of the breaker associated therewith, and the lead bar rotates due to the load of the electric wire. A new problem arises that the screw is loosened.

Japanese Patent No. 4442853

  An object of the present invention is to solve the above-mentioned problems, and in a plug-in unit used in a plug-in type distribution board in which a lead bar is connected to a terminal portion of a breaker and an electric wire is connected through the lead bar, It is possible to avoid the deformation and rotation of the lead bar due to the above, and to provide a technique for reducing the load on the terminal portion of the breaker.

The plug-in unit used in the plug-in type distribution board of the present invention made to solve the above-mentioned problems includes a plurality of trunk bars installed perpendicular to the panel surface, and is detachable from these trunk bars. A plug-in unit used in a plug-in distribution board having an electrical device such as a breaker mounted on the upper surface of the adapter connected to the terminal, wherein a lead bar is connected to the terminal portion of the electrical device, A lead bar support member for preventing deformation and rotation of the lead bar due to the load of the electric wire connected to the lead bar is disposed in the vicinity of the terminal portion.

  According to a second aspect of the present invention, in the plug-in unit used in the plug-in type distribution board according to the first aspect, the adapter is provided with a handle at the end that serves as a handle at the time of attaching / detaching to the main bar. The lead bar support member is disposed on the upper surface of the handle portion.

  According to a third aspect of the present invention, in the plug-in unit used in the plug-in type distribution board according to the first aspect, the lead bar support member is provided so as to be separable from the adapter.

  Plugs used in plug-in distribution boards with multiple trunk bars installed perpendicular to the board surface, and electrical equipment such as breakers mounted on the top surface of adapters that are detachably connected to these trunk bars. In the in-unit, the load of the electric wire applied to the lead bar by connecting the lead bar to the terminal part of the electric device and arranging the lead bar support member supporting the lead bar in the vicinity of the terminal part of the adapter. Can be dispersed. Therefore, according to the present invention, even when the breaker capacity increases and the electric wire becomes thicker and heavier, deformation and rotation of the lead bar due to the load of the electric wire can be avoided, and the burden on the terminal portion of the breaker is reduced.

  In addition, in the present invention, since the configuration in which the lead bar support member is provided on the upper surface of the adapter is adopted, it is not necessary to separately prepare a base for mounting the lead bar support member in the housing, and the conventional plug New functions can be added by using the basic form of the plug-in unit used in the in-type distribution board as it is.

It is a whole explanatory view of the plug-in type distribution board of this embodiment. It is a whole perspective view of the plug-in unit comprised from a breaker and an adapter. It is a side view of the state which connected the lead bar to the plug-in unit. It is a whole perspective view in the state where a lead bar was connected to a plug-in unit. It is a whole perspective view in the state where an electric wire was connected to a plug-in unit via a lead bar. It is a whole perspective view of a lead bar support member. It is explanatory drawing of a prior art. It is explanatory drawing of a prior art. It is a side view of the other example of holding structure of a lead bar support member.

  Preferred embodiments of the present invention are shown below.

  In FIG. 1, reference numeral 1 is a main breaker of the distribution board, and 2 is a main bar connected to the load side of the main breaker 1. These main bars 2 are installed perpendicular to the board surface 3. Reference numeral 3 denotes adapter fixing rails 2 a installed on both sides of the main bar 2. In the present invention, the plug-in type adapter 4 is attached to the main bar 2 from above the board surface, and the breaker 5 is attached to the main bar 2 via the adapter 4. In addition, although this embodiment uses the breaker 5 as an electric equipment, it may be set as the electric equipment etc. which have a terminal block and a terminal part instead of the breaker 5. FIG.

  As shown in FIGS. 2 and 3, the adapter 4 is provided with an insertion plug 7 to the main bar 2 on the lower surface of the case 6, and a connection bar (not shown) connected to the insertion plug 7 is provided on the upper surface of the adapter 4. The power supply side terminal portion 9 of the mounted breaker 5 is connected. By using such an adapter, the breaker itself can be used instead of the plug-in type.

  As shown in FIGS. 3 and 4, a lead bar 11 is connected to the load side terminal portion 10 of the breaker 5. The lead bar 11 is composed of two sides: a connection side 12 having one end connected to the load side terminal portion 10 and a bent side 13 formed by bending the other end of the connection side 12 toward the adapter 4. It has the shape of

  In this embodiment, a three-pole breaker is used, and the lead bar 11 having the shape is connected to all three poles.

  As shown in FIG. 5, an electric wire 14 is connected to the tip of the bent side 13.

  In this embodiment, as shown in FIG. 3 to FIG. 5, the lead bar 11 connected to each pole of the three-pole breaker has a length of the connecting side 12 and a length of the bent side 13. It is formed so as not to overlap, and the electric wires 14 connected to each pole overlap each other so that the wiring is not hindered.

  When the electric wire 14 having a large diameter and a large weight is connected to the tip of the bent side 13 of the lead bar 11, a large load is applied to the lead bar 11 and a large bending stress is generated. In the present invention, a lead bar support member 15 that supports the lower surface of the lead bar is disposed on the upper surface of the adapter 4 in the vicinity of the load-side terminal portion 10, and the lead bar 11 can be fixed to the lead bar support member 15 with screws. By doing so, the load of the electric wire applied to the lead bar 11 is distributed, and the deformation of the lead bar 11 due to the load of the electric wire is avoided. In particular, when the L-shaped lead bar 11 is connected as in this embodiment, the lead bar 11 may be deformed in the twisting direction due to the load of the electric wire. Since the bar support member 15 is firmly fixed at two points, it is possible to prevent deformation.

  In addition, not only the L-shaped lead bar 11 but also the lead bar 11 having only the connecting side 12 that does not form the bent side 13, the breaker 5 is held perpendicular to the main bar 2 as shown in FIG. In this case, a load is applied to the lead bar 11 so as to rotate downward, but the lead bar 11 is connected to the load-side terminal portion 10 of the breaker 5 as in the present embodiment, and the lead bar support member. Since it is also fixed on 15, it can be firmly held against a rotating load, and since it is prevented from rotating, problems such as loosening of screws do not occur.

  In addition, since the configuration in which the lead bar support member 15 is provided on the upper surface of the adapter 4 is adopted, there is no need to separately prepare a base for the lead bar support member 15, so that the number of components can be reduced and The basic form of the plug-in unit can be used as it is.

  In this embodiment, as shown in FIG. 2, the upper end of the adapter 4, that is, the handle portion 6 a formed in the direction of the terminal portion of the breaker 5 of the adapter 4 (location that becomes a handle when attaching to and detaching from the main bar 2). A lead bar support member 15 is disposed on the upper surface. The handle portion 6a may be extended from the side forming the rail attachment portion 6b attached to the adapter fixing rail 2a, and at least the end portion of the adapter 4 is outside the terminal portions 9 and 10 of the breaker 5. What is necessary is just to be formed so that it may protrude and the lead bar support member 11 can be installed. In the present embodiment, the lead bar support member 11 is fixed to the upper surface of the handle portion 16 formed on the adapter 4 by screwing via the mounting portion 15a, but is integrated with the handle portion 16 of the adapter 4. It can also be formed. As another structure, as shown in FIG. 9, a lead bar support member 15 may be formed on the adapter 4 in the vicinity of the terminal portion of the breaker 5 via a mounting bracket 25.

  As shown in FIG. 6, a lead bar support surface 16 that supports the lower surface of the lead bar 11 is formed on the upper surface of the lead bar support member 15. Since one end of the lead bar 11 is connected to the load side terminal portion 10, the connection surface 17 and the lead bar support surface 16 in the load side terminal portion 10 are positioned on substantially the same plane so that the lead bar 11 is horizontal. It is preferable to have a structure that is kept at

  In addition, as shown in FIG. 5, the lead bar support member 15 has a structure that can hold the partition member 19 that holds the insulating cover 18 so that the insulating cover 18 can be disposed between the adjacent lead bars 11. Is preferred. In this case, as shown in FIG. 6, the lead bar support member 15 is formed with a plurality of partition member holding portions 20 that hold the partition member 19, and the tip height position of the partition member 19 is provided for each breaker having a different height. It is preferable that the structure be adjusted.

  As an explanation of this embodiment, a lead bar support member 15 is formed on the load terminal portion 10 side of the breaker 5 to reduce the load on the load terminal portion 10 of the breaker 5 and the lead bar 11 itself. However, when the main breaker 1 is mounted on the main bar 2, a lead bar 11 for connecting an electric wire for input from a substation, a power receiving facility, or the like may be connected to the power source side terminal portion 9 side. Therefore, the lead bar support member 15 of the present embodiment may be formed on the handle portion 16 on the power source side terminal portion 9 side of the adapter 4.

DESCRIPTION OF SYMBOLS 1 Main trunk breaker 2 Trunk bar 2a Adapter fixing rail 3 Panel surface 4 Adapter 5 Breaker 6 Case 6a Handle part 6b Rail attachment part 7 Plug 9 Power supply side terminal part 10 Load side terminal part 11 Lead bar 12 Connection side 13 Bending side 14 Electric wire 15 Lead bar support member 15a Mounting portion 16 Lead bar support surface 17 Connection surface 18 at load side terminal portion Insulating cover 19 Partition member 20 Partition member holding portion 21 Breaker 22 Electric wire 23 Housing 24 Lead bar

Claims (3)

Plugs used in plug-in distribution boards that have multiple trunk bars installed perpendicular to the board surface and that have electrical devices such as breakers mounted on the top surface of adapters that are detachably connected to these trunk bars. In-unit,
A lead bar is connected to the terminal portion of the electrical device,
Used in a plug-in type distribution board, wherein a lead bar support member that prevents deformation and rotation of the lead bar due to the load of the electric wire connected to the lead bar is disposed in the vicinity of the terminal portion of the adapter. Plug-in unit.   2. The plug according to claim 1, wherein the adapter includes a handle portion as a handle at the time of attaching / detaching to the main bar at the end portion, and the lead bar support member is disposed on an upper surface of the handle portion. Plug-in unit used for in-type distribution boards.   The plug-in unit used for a plug-in type distribution board according to claim 1, wherein the lead bar support member is detachable from the adapter.