JP4807844B2 - Breaker module mounting structure - Google Patents

Description

  The present invention relates to a structure for mounting a breaker module of a plug-in type to a distribution board.

  A breaker with a terminal part to which wires are connected is attached to the top surface of a plug-in adapter with a plug connection bracket on the bottom to form a breaker module. This breaker module is plugged into the bus bar of the distribution board. It is known that the connection is made in a manner as shown in Patent Documents 1 and 2. As shown in Patent Document 1, the plug-in adapter is provided with a three-phase lead bar extending from the plug connection fitting on the bottom surface, and the upper end of each connection bar is connected to the power supply side terminal portion of the breaker. In addition to this, it is also possible to construct a breaker module with a single breaker by omitting the plug-in adapter and having a structure in which a plug fitting is protruded from the bottom surface of the breaker body.

Such a breaker module has an advantage that it can be easily attached to and detached from the distribution board, but there is a possibility that the breaker module is accidentally removed from the bus bar while being energized. For this reason, Patent Document 2 discloses a lock mechanism using a rotating disk provided with a spiral groove so that the breaker module cannot be easily removed. However, since the mounting structure of Patent Document 2 uses a very complicated lock mechanism, there is a problem that the manufacturing cost increases.
JP 2005-327615 A JP 2004-319427 A

  The present invention solves the above-described conventional problems, and provides a breaker module mounting structure excellent in safety that has a simple structure and can reliably prevent the breaker module from being removed while it is energized. It is for the purpose.

The present invention made in order to solve the above-mentioned problems is a breaker module mounting structure in which a breaker module having a plug connecting bracket on the bottom surface is fixed to a mounting board of a distribution board with a fixing tool. A cover that covers the upper surface of the fixture and prevents it from being removed from the terminal portion. When the wire is connected, the upward rotation is restricted and the fixture cannot be operated, and the wire is connected. It is characterized in that it is provided so as to be rotatable so that it can be rotated upward when it is not in operation, and the fixture can be operated.

  According to the mounting structure of the breaker module of the present invention, the fixing tool cannot be operated when the electric wire is connected to the terminal portion of the breaker, and the fixing tool is operated when the electric wire is not connected. Since the cover that can be used is provided, the breaker module cannot be removed from the distribution board mounting base unless the wires are removed, that is, not in the de-energized state, and the removal in the energized state can be prevented. . Since the structure of the present invention does not use a complicated locking mechanism, the cost is not increased.

In addition, the cover is supported so that it can rotate freely. When the electric wire is connected, its upward rotation is restricted , so it is easy to open and close the cover after removing the electric wire and it can be lost. There is no. Moreover, if the cover can be temporarily held at a position where it interferes with the electric wire unless the cover is closed, it is possible to prevent the cover from being forgotten to be closed or forgotten to be attached.

Preferred embodiments of the present invention are shown below.
FIG. 1 is an overall perspective view of a distribution board, and FIG. 2 is a partially enlarged perspective view thereof. As shown in FIG. 1, a main breaker 2 is provided at the upper end inside the casing 1 of the distribution board, and a three-phase bus bar 3 is provided vertically inside the casing 1. Although not shown by being covered by the cover 4, the upper end of each bus bar 3 is connected to the load side terminal of the main breaker 2. Feeding clips 5 are projected on the upper surface of each bus bar 3 at regular intervals, and the number of branch breakers is determined by attaching the required number of breaker modules 6 that are branch breakers to positions where the feeding clips 5 are located on the bus bar 3. The distribution board can be changed.

  As shown in FIG. 11, a connection portion 1 a for enabling connection of an expansion distribution board 30 that can be added / reduced as necessary is formed at the lower part of the distribution board casing 1. That is, the connecting portion 1a extends the bus bar 3 from the lower part of the casing 1 of the distribution board to the outside of the casing, and is provided with a feeding clip 5 at the end thereof, and a short bus bar of an extension distribution board 30 described later. The end portion of 31 is covered with an insulating case 1c provided with a notch 1b that can intervene. Further, the distribution board 30 for extension includes a short bus bar 31 inside the bus bar case 32, and the end thereof protrudes to the outside so that it can be inserted into the connecting portion 1a.

  As shown in FIG. 2, a mounting base 7 also serving as an insulating cover is attached to the upper surface of the bus bar 3 of the distribution board, preventing an electric shock accident. Although omitted in FIG. 1, the mounting base 7 is also attached to the lower portion where the breaker module 6 is not installed. The mounting base 7 is provided with a slit 8 at a position corresponding to the three-phase bus bar 3 so that the breaker module 6 fixed on the mounting base 7 can be connected to the bus bar 3.

  Further, as shown in FIGS. 12 and 13, the distribution board 30 for expansion is provided with a mounting base 33 made of an insulator on the upper part of the bus bar case 32 that houses the short bus bar 31 described above. The mounting base 33 is provided with slits 33a at positions corresponding to the three-phase bus bar 31 so that the breaker module 6 fixed on the mounting base 33 and the bus bar 31 can be connected.

  Next, the structure of the breaker module 6 will be described. As shown in FIGS. 3 and 4, the breaker module 6 in the present embodiment has a structure in which a breaker 10 is mounted on a plug-in adapter 9. 5 and 6 are perspective views showing the plug-in adapter 9 as a single unit. The plug-in adapter 9 includes a resin main body portion 11 and a three-phase lead bar 12. The breaker 10 is fixed to the upper surface of the main body portion 11 by four mounting screws.

  Each lead bar 12 is provided on the lower surface of the main body portion 11, and a plug connection fitting 14 projects downward from the lower end portion thereof. The plug connector 14 has a blade shape as shown in FIG. 6 and is inserted into the feeding clip 5 on the bus bar 3 described above. For this reason, the length of each lead bar 12 is different for each phase, and the position of the plug fitting 14 is made to correspond to the position of the three-phase bus bar 3. As shown in FIG. 5, the upper end of each lead bar 12 rises upward and is connected to the terminal portion 15 on the power source side of the breaker 10. Since this portion is covered with the cover 16, there is no risk of electric shock.

  Such a breaker module 6 is being fixed on the mounting base 7 of a distribution board with the fixing screws 17 and 18 which are fixing tools. In this embodiment, the breaker module 6 is attached to the mounting base 7 that also serves as an insulating cover. It can be used as the mounting base 7. Moreover, the breaker module 6 can be similarly attached to the mounting base 33 of the distribution board 30 for expansion.

  In this embodiment, there are two fixing screws, and the fixing screw 17 is provided at a corner portion on the power source side. However, the other fixing screw 18 is positioned below the electric wire connected to the load-side terminal portion 19 of the breaker 10 as shown in FIG. 3, and its upper portion is covered with a cover 20 described later. . The fixing screw 18 is positioned below the electric wire 23, but may be within the range covered by the cover 20, and does not necessarily need to be directly below the electric wire 23. Further, the fixing tool is not limited to a fixing screw, and may be a means such as a latch or a bush rivet that requires an operation when fixing.

In this embodiment, the cover 20 is provided on the load side of the breaker module 6. The cover 20 is an integrally molded product made of resin as shown in FIG. 7, and is rotatably attached to the support portion 22 of the plug-in adapter 9 so as to be rotatable about the shaft 21 at the tip of the arm on both sides. ing. The cover 20 is a member for covering the upper surface of the fixing screw 18 and preventing its removal. The cover 20 is preferably transparent so that the position of the fixing screw 18 can be easily understood.

  As shown in FIG. 8, when the cover 20 is rotated downward, the cover 20 has a size that does not interfere with the connection of the electric wire 23 to the load-side terminal portion 19 of the breaker 10. However, as shown in FIG. 9, when the electric wire 23 remains connected, the electric wire contact portion 24 interferes with the electric wire 23 and cannot be rotated upward. In addition, the illustrated wire contact portion 24 has three protrusions corresponding to the number of load-side terminal portions 19 of the breaker 10, and the cover 20 rotates in a state where even one load-side wire is connected. Not to do. For this reason, in the state which connected the electric wire 23 to the terminal part 19 of the load side of the breaker 10, the electric wire 23 and the cover 20 become obstructive, and the fixing screw 18 cannot be removed. Therefore, the breaker module 6 cannot be removed unless the electric wire 23 is removed, that is, in a non-energized state, and the removal in the energized state can be prevented.

  In order to remove the fixing screw 18, the electric wire 23 is removed as shown in FIG. 10, and the cover 20 may be set to the temporary holding position rotated 90 degrees upward. Further, if the cover 20 is in the temporary holding position as shown in FIG. 10, the electric wire 23 cannot be connected to the load side terminal portion 19 of the breaker 10. It must be rotated downward, and forgetting to close the cover 20 can be prevented.

  As described above, the breaker module mounting structure of the present invention has an advantage that it is possible to reliably prevent the breaker module from being removed while it is energized with a simple structure. In the above embodiment, the breaker module 6 having a structure in which the breaker 10 is mounted on the plug-in adapter 9 is used. However, the plug connection metal fitting is protruded from the bottom surface of the breaker body without using the plug-in adapter 9. As described above, the breaker module 6 can be configured by a single breaker.

  Further, the breaker module fixed to the distribution board housing 1 can be fixed to the additional distribution board 30 and the parts can be shared. In the embodiment, the cover 20 is rotatably supported. However, the fixing screw cannot be operated when the electric wire is connected, and the fixing screw is not used when the electric wire is not connected. For example, the cover may be detachably attached to the plug-in adapter 9.

It is a whole perspective view of the electricity distribution panel of an embodiment. It is a partial expansion perspective view of the electricity distribution panel of an embodiment. It is a perspective view of a breaker module. It is a perspective view of a breaker module. It is a perspective view of a plug-in adapter. It is a perspective view of a plug-in adapter. It is a perspective view of a cover. It is a perspective view in the state where an electric wire was connected. It is a perspective view of the state which tried to rotate a cover, with an electric wire connected. It is a perspective view in the state where an electric wire was removed and a cover was rotated up. It is a perspective view which shows a mode that the distribution board for expansion is connected to a distribution board. It is a perspective view which shows the mode of the inside of the distribution board for expansion. It is a perspective view which shows the relationship between the mounting base of an expansion distribution board, and a breaker module.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Distribution board case 2 Main breaker 3 Bus bar 4 Cover 5 Feeding clip 6 Breaker module 7 Mounting base which also serves as an insulating cover 8 Slit 9 Plug-in adapter 10 Breaker 11 Main body part 12 Lead bar 14 Plug connection bracket 15 Power supply side Terminal portion 16 Cover 17 Fixing screw 18 Fixing screw 19 Load side terminal portion 20 Cover 21 Shaft 22 Support portion 23 Electric wire 24 Electric wire contact portion 30 Additional distribution board 31 Short bus bar 32 Bus bar case 33 Mounting base

Claims (1)

In a breaker module mounting structure in which a breaker module with a plug connection bracket on the bottom is fixed to a distribution board mounting base with a fixing tool, the terminal of the breaker module breaker module covers the upper surface of the fixing tool and removes it. When the electric wire is connected , the cover is prevented from rotating upward so that the fixture cannot be operated . When the electric wire is not connected , the cover is rotated upward to operate the fixture. Breaker module mounting structure, wherein the breaker module is provided so as to be rotatable .

Images