JP4390186B2 - Main bus bar mounting structure - Google Patents

Description

    The present invention relates to a main bus bar mounting structure for mounting a plurality of plug-in units each having a connection bar provided with a plug on the back side of a distribution board, a distribution board, or the like.

  Usually, a strip-like main bus bar for mounting a plurality of conventional plug-in units is vertically installed with respect to a support base and fixed only at the bottom. However, if the plug-in unit is installed with a space left in the main bus bar and the plug of the plug-in unit is not fitted, the adjacent main bus is connected when an overcurrent flows due to a short circuit accident or the like. There is a problem that the bars are strongly attracted and deformed.

As another example, the main bus bar is sandwiched between a pair of support members via an insulating block and clamped and held by a tightening member such as a screw to fix one support member in the switchboard ( Patent Document 1). However, since the support members are located at the same place on both ends of the main bus bar as a pair, the main bus bar of the entire pair of support members is used when the other support member becomes an obstacle when the plug-in unit is attached. Therefore, it is necessary to remove the support member and the main bus bar and then reattach them.
Japanese Patent Laid-Open No. 2003-164018

  The present invention solves the conventional problems as described above, and even when the number of plug-in units attached is small, adjacent main bus bars are strongly attracted and deformed when an overcurrent flows due to a short circuit accident or the like. It is another object of the present invention to provide a main bus bar mounting structure in which it is easy to change the mounting position of the reinforcing member of the main bus bar which becomes an obstacle when the mounting location of the plug-in unit is changed.

The mounting structure of the main bus bar according to the present invention is such that a plug is disposed on the back side of the insulating base, and a plurality of plug-in units having electrical devices mounted on the front side of the insulating base are fixed to the support base. The upper plate of the plug-in unit mounting rail which is detachably connected to the three main bus bars arranged vertically and has mounting pieces extended on both sides of the plug-in unit on both sides of the main bus bar The plug-in unit mounting rail is attached to a mounting base portion in which reinforcing members provided with three recessed portions for fitting the upper portions of the three main bus bars are stretched on both sides of the reinforcing member. It attaches to an upper board part, and it installed in the arbitrary places before and behind the said plug-in unit attachment rail, and the fixation to the support stand of a main bus-bar is reinforced . In the present invention, it is preferable to provide an insulating barrier mounting groove in the reinforcing member, and it is more preferable to provide a protective plate mounting portion of a protective plate that covers the upper portion of the exposed end portion of the main bus bar in the reinforcing member.

    The main bus bar mounting structure of the present invention is a plug-in unit mounting rail in which three main bus bars are fixed to a support base and arranged vertically, and upper portions of the main bus bar are arranged on both sides of the main bus bar. Since it fits into the recessed part of the attached reinforcing member, when an overcurrent flows due to a short circuit accident or the like, the adjacent main bus bars are not attracted and deformed. Further, since the reinforcing members are attached to the plug-in unit mounting rails arranged on both sides of the main bus bar, when the plug-in unit mounting position is changed, even if the reinforcing member is at the changed position, the reinforcing member The mounting position of only can be easily changed.

    In addition, if an insulating barrier mounting groove is provided in the reinforcing member, it is possible to secure insulation between adjacent main bus bars by attaching an insulating barrier to the insulating barrier mounting groove of the reinforcing member disposed on the end side of the main bus bar. Is. In addition, since the reinforcing member is provided with a protective plate mounting part for the protective plate that covers the upper part of the exposed end of the main bus bar, the protective plate can be attached and the finger touches the charging part when operating the breaker. It is something that does not cause.

Next, preferred embodiments of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a support base for supporting a main bus bar 2 attached to a panel surface 100 such as a distribution board, a distribution board, etc. The support base 1 has three attachment parts 12 provided upright on an upper surface of a base part 11. The main bus bar 2 is fixed by screwing the mounting screw 12b inserted through the mounting hole 12a provided in the mounting portion 12 into the screw hole 21 provided in the strip-shaped main bus bar 2 arranged perpendicularly to the base portion 11. The base part 11 is attached to the board surface 100 by screwing.

    Reference numeral 3 denotes a plug-in unit mounting rail having a U-shaped cross section installed on both sides of the main bus bar 2. Reference numeral 4 denotes a reinforcing member made of an insulating material provided with three recessed portions 41 for fitting the upper portions of the three main bus bars 2 arranged and fixed perpendicularly to the support base 1. Are attached to the upper plate portion 31 of the plug-in unit mounting rail 3 by screwing the mounting base portions 42, 42 stretched on both sides, and the upper portion of the main bus bar 2 is fitted to the recessed portion 41, The fixing of the bus bar 2 to the support 1 is reinforced. As shown in FIG. 6, the reinforcing member 4 has a front and rear plate portions 4 b and 4 c which are formed in an inverted box shape in which the left and right lower plate portions 4 d and 4 e are vertically suspended from the front and rear lower portions of the upper plate portion 4 a which is elongated in the left and right direction. The front and rear partition plates 4f are provided in the middle of the plate portions 4b and 4c, and the recessed portions 41 are provided at the lower ends of the front and rear plates 4b and 4c and the front and rear partition plates 4f. However, it is not limited to this, and it may be a wide plate.

    The reinforcing member 4 is provided with an insulating barrier mounting groove 43. The insulating barrier mounting groove 43 is provided in the longitudinal direction at the intermediate position of the three recessed portions 41 on both the front and rear surfaces of the reinforcing member 4, and is provided on the front and rear surfaces to thereby end the main bus bar 2. When the insulating barrier 5 is mounted on the side, the insulating barrier mounting groove 43 always faces the end of the main bus bar 2 regardless of the mounting direction. The insulating barrier mounting groove 43 may be provided on one of the front and rear surfaces of the reinforcing member 4 so that one of the insulating barrier mounting grooves 43 faces the end side of the main bus bar 2 when the reinforcing member 4 is mounted.

    Further, the reinforcing member 4 is provided with a protective plate attaching portion 44 of the protective plate 6 covering the upper part of the exposed end portion of the main bus bar 2. The protective plate mounting portion 44 is formed by forming the upper end of the reinforcing member 4 on the flat support portion 44a and providing screw holes 44b on both sides thereof. The lower surface of the base end of the protective plate 6 is in contact with the flat support portion 44a. The upper mounting screw is inserted into the mounting hole of the protective plate 6 and screwed into the screw hole 44b for mounting.

    7, three connecting bars 72 provided with plugs 71 that can be freely inserted into and removed from the main bus bar 2 are arranged on the back side of the insulating base 70, and the tips of the connecting bars 72 are on the front side of the insulating base 70. This is a plug-in unit in which an electric device 73 such as a breaker and a terminal block connected to the connection bar 72 is mounted on the front side of the insulating base 70. The plug-in unit 7 has a mounting hole 74 provided in the mounting piece 74 on the upper plate portion 31 of the plug-in unit mounting rail 3 with a plug 71 connected to the main bus bar 2 and stretched on both sides. 74a is attached by inserting a screw.

    In this configuration, three main bus bars 2 are fixed to the support base 1 and arranged vertically, and the upper portion of the main bus bar 2 is arranged on both sides of the main bus bar 2. The main bus bar 2 is fixedly fixed to the support base 1 by being fitted into the recess 41 of the reinforcing member 4 attached to the rail 3. Therefore, even when the plug-in unit 7 is attached at an interval before and after the main bus bar 2, even if the adjacent main bus bars 2, 2 are strongly attracted when an overcurrent flows due to a short circuit accident or the like. Since each main bus bar 2 is firmly fixed by the support base 1 and the reinforcing member 4, it does not deform.

    1 to 4, the reinforcing member 4 is attached to the plug-in unit mounting rail 3 so as to be vertically paired with the support base 1, and the mounting screw 12 b of the main bus bar 2 is attached to the lower end of the reinforcing member 4. A partition wall 45 that separates the other adjacent main bus bar 2 is provided, and a concave portion 46 is provided at the lower portion, that is, the lower end of the front and rear partition plate portion 4f, and a convex portion that is fitted to this is provided on the support base 1. In this case, it is easy to install as a pair of upper and lower sides. Since the reinforcing member 4 is attached to the plug-in unit mounting rails 3 arranged on both sides of the main bus bar 2, when the mounting position of the plug-in unit 7 is changed, the reinforcing member 4 is present at the changed position. However, only the reinforcing member 4 can be removed from the plug-in unit mounting rail 3 and easily attached to another location. In this way, the reinforcing member 4 can be installed at an arbitrary position of the plug-in unit mounting rail 3 regardless of the position of the support base 1 to reinforce the fixing of the main bus bar 2 to the support base 1. When the is installed at an interval, there is also a function as a blank space member that insulates and isolates the main bus bar 2 by being installed at that location.

    Further, if the insulating barrier mounting groove 43 is provided in the reinforcing member 4, the insulating barrier 5 is mounted in the insulating barrier mounting groove 43 of the reinforcing member 4 disposed on the end side of the main bus bar 2, and adjacent main bus bars are disposed. The insulation between 2 and 2 can be ensured.

    Further, by providing the reinforcing member 4 with the protective plate mounting portion 44 of the protective plate 4 that covers the upper part of the exposed end portion of the main bus bar 2, the charging portion can be covered with the protective plate 6 and the breaker is operated. In addition, there is no possibility of accidents due to fingers touching the main bus bar 2. Further, the protective plate mounting portion 44 has the upper end of the reinforcing member 4 formed on the flat support portion 44a and provided with screw holes 44b on both sides thereof, and provided with downward inclined surface portions 44c and 44c on the front and rear sides of the flat support portion 44a. In this case, when the reinforcing member 4 is to be the attachment start position of the plug-in unit 7, the inclined surface portions 44 c and 44 c serve as guiding portions to facilitate the attachment of the plug-in unit 7.

It is a perspective view which shows embodiment of this invention. It is a side view which shows embodiment of this invention. It is a perspective view which shows the embodiment of this invention in the state which attached the insulation barrier. It is a perspective view which shows the embodiment of this invention in the state which attached the insulation barrier and the protection plate. It is a perspective view which shows one example of a reinforcement member. It is a perspective view which shows one example of a reinforcement member from the lower side. It is a perspective view which shows one example of a plug-in unit from the lower side. It is a perspective view which shows one example which used the reinforcing member as a blank space member. It is a front view showing a distribution board using the present invention.

Explanation of symbols

1 Support base 2 Main bus bar 3 Plug-in unit mounting rail 4 Reinforcing member 4 1 Notch 4 3 Insulation barrier mounting groove 4 4 Protection plate mounting 7 Plug-in unit 71 Plug 72 Connection bar

Claims (3)

Three main bus bars in which a plug is arranged on the back side of the insulating base, and a plurality of plug-in units having electrical devices mounted on the front side of the insulating base are vertically arranged with the plug fixed to the support base Are attached to the upper plate portion of the plug-in unit mounting rails arranged on both sides of the main bus bar, and attached to both sides of the plug-in unit.
Further, a reinforcing member provided with three recesses for fitting the upper portions of the three main bus bars is attached to the upper plate portion of the plug-in unit mounting rail by mounting bases stretched on both sides of the reinforcing member. A main bus bar mounting structure, wherein the main bus bar mounting structure is installed at any location before and after the plug-in unit mounting rail to reinforce the fixing of the main bus bar to the support base .   The main bus bar mounting structure according to claim 1, wherein an insulating barrier mounting groove is provided in the reinforcing member.   The main bus bar mounting structure according to claim 1 or 2, wherein the reinforcing member is provided with a protective plate mounting portion of a protective plate that covers an upper portion of the exposed end portion of the main bus bar.

Images