Bus bar mounting structure for cabinet

Abstract

To provide a bus bar mounting structure for a cabinet that can reduce a stationary portion of a bus bar in the cabinet so as not to narrow a wiring space.SOLUTION: For a cabinet 1 including an instrument storage space M that stores an electric instrument, a bus bar 6 is used for supplying power to the stored electric instrument. A bottom of the cabinet is formed so as to open, so that a floor is exposed to the instrument storage space M. The bus bar 6 has a lower end fixed to the exposed floor. The bus bar 6 is arranged to stand in the instrument storage space M.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bus bar mounting structure for a cabinet for arranging bus bars to supply power to electrical equipment housed in the cabinet. [Background technology]

[0002] There is a cabinet that includes a power supply unit and a bus bar that serves as a power supply path extending from the power supply unit, and that supplies power to housed electrical equipment using the bus bar. For example, Patent Document 1 describes a configuration in which a power supply unit is disposed in the center of the cabinet, and bus bars electrically connected to the power supply unit are disposed vertically at the center of the rear of the cabinet, and DC power is supplied to each housed electrical equipment via the bus bar. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-74667 Summary of the Invention [Problem to be solved by the invention]

[0004] In the cabinet disclosed in Patent Document 1, the upper and lower ends of the bus bar are fixed to the cabinet using fixing members, an intermediate bar fixing portion is provided in the center, and the bus bar is fixed to the cabinet by members spanning the left and right sides. On the other hand, cables and the like connected to the housed electrical equipment are routed in the space between the housed electrical equipment and the side surface of the cabinet. Therefore, the fixing members for fixing the bus bars to the cabinet are arranged across the wiring space for cables, etc., which restricts the wiring space and makes wiring work less efficient.

[0005] In view of the above problems, the present invention has an object to provide a bus bar mounting structure for a cabinet that can reduce the number of fixing portions for the bus bar inside the cabinet so that the wiring space does not become narrow. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, a first configuration of the present invention is a bus bar mounting structure for a cabinet, in which a bus bar for supplying power to the stored electrical equipment is mounted in the equipment storage space of a cabinet having an equipment storage space for storing electrical equipment, the bottom of the cabinet being open so that the floor is exposed to the equipment storage space, and the bus bar has its lower end fixed to the exposed floor and is arranged upright in the equipment storage space. With this configuration, the lower end of the bus bar is fixed directly to the floor on which the cabinet is installed, so there is no need to connect the lower part of the bus bar to the cabinet, and there is no restriction on the wiring space for the electrical equipment stored at least below the cabinet.

[0007] Another aspect of the present invention is characterized in that, in the above-mentioned configuration, a power supply unit that supplies power to the electrical equipment via the bus bar is located in the center of the equipment storage space or above the center, and the electrical connection portion between the power supply unit and the bus bar functions as an upper fixing portion of the bus bar. With this configuration, the bus bar and the power supply unit are electrically connected at the upper fixing portion of the bus bar, so they can be fixed without a separate connecting portion to the cabinet. Therefore, there is no connection between the bus bar and the cabinet, and the installation of the bus bar does not narrow the wiring space provided around the equipment storage space.

[0008] Another aspect of the present invention is characterized in that, in the above-mentioned configuration, the bus bars are connected to a fixing member fixed to the floor and arranged upright, and the fixing member has an adjustment portion that adjusts the position of the bus bars in the up-down direction. According to this configuration, the vertical position of the bus bar can be adjusted, so that the positions of the screw holes of the bus bar to be connected can be adjusted relative to the stored rack-mounted equipment, thereby achieving a good connection. [Effects of the Invention]

[0009] According to the present invention, the lower ends of the bus bars are directly fixed to the floor on which the cabinet is installed, so there is no need to connect the lower parts of the bus bars to the cabinet, and there is no restriction on the wiring space for the electrical equipment housed at least below the cabinet. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of a cabinet with a door and a surrounding closure plate removed to expose a frame, showing an example of a bus bar mounting structure for a cabinet according to the present invention. FIG. [Figure 2] FIG. 2 is a perspective view of the cabinet of FIG. 1 as seen from the rear. [Figure 3] FIG. 2 is a plan view of the cabinet of FIG. 1. [Figure 4] 2 is an enlarged view of a portion A1 shown in FIG. 1, showing the lower end of a bus bar. FIG. [Figure 5] 3 is an enlarged view of part A2 shown in FIG. 2, showing the lower end of the bus bar from a different angle. [Figure 6] 3 is an enlarged view of part B shown in FIG. 2, illustrating the connection between the power supply unit and the bus bar. FIG. [Figure 7] An explanatory diagram of part B seen from a different angle [Figure 8] FIG. 2 is a partial side view of the bus bar, and is a left side view of the center portion of the bus bar. [Figure 9] FIG. 9 is a cross-sectional view taken along line CC in FIG. 8. [Figure 10] FIG. 9 is a cross-sectional view taken along the line DD in FIG. 8. [Figure 11] FIG. [Figure 12] 10A and 10B are views showing another embodiment of the anchor; DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. Figures 1 to 3 show an example of a cabinet bus bar mounting structure according to the present invention, with Figure 1 being a perspective view of the cabinet as seen from the front, Figure 2 being a perspective view of the cabinet as seen from the rear, and Figure 3 being a plan view of the cabinet. These figures show a state in which the door and surrounding closing members have been removed to expose the frame. The cabinet 1 has doors on the front and back that can be opened and closed, and the left and right sides and the ceiling are closed with panels, but for convenience of explanation these have been removed in the drawing.

[0012] The frame that forms the cabinet 1 is made up of a rectangular bottom frame 2 at the bottom, a similarly rectangular ceiling frame 3 at the ceiling, and rod-shaped vertical frames 4 at the four corners between the two. An equipment storage space M is formed inside the box body formed by the frame in this way. A pair of mounting angles 5 for fixing the electrical equipment to be stored are arranged upright between the left and right vertical frames 4 on the front side of the cabinet 1, which is the front side of the equipment storage space M. This configuration makes it possible to store rack-mounted electrical equipment.

[0013] A bus bar 6 is disposed in the center of the rear of the equipment storage space M, forming a power supply path for supplying power to the stored electrical equipment. The bus bar 6 includes two conductor bars 7 to which positive and negative DC voltages are applied. The periphery of the equipment storage space M is also a wiring space for wiring cables and the like to the stored electrical equipment. 1 and 2, a power supply unit 8 that supplies DC power to the stored equipment is placed in the center of the equipment storage space M and is connected to the conductor bars 7 of the bus bars 6. Also, F indicates the floor on which the cabinet 1 is installed.

[0014] Figure 4 is an enlarged view of part A1 in Figure 1, and Figure 5 is an enlarged view of part A2 in Figure 2, with Figures 4 and 5 showing the same part at different angles. There is no closing member at the bottom of cabinet 1, and floor F on which cabinet 1 is installed is exposed to equipment storage space M, and busbars 6 are attached directly to this floor F and arranged upright, as shown in Figures 4 and 5. Specifically, anchors 11 serving as fixing members are fixed to the floor F by anchor bolts (not shown) or the like, and the bus bars 6 are fixed to the anchors 11.

[0015] Anchor 11 is formed in an L-shape and includes floor-fixing part 11a that is in close contact with the floor and fixed with an anchor or the like, busbar-fixing part 11b that is formed by bending vertically from floor-fixing part 11a and standing up, and mounting base 11c on which busbar 6 is placed. Mounting base 11c is fixed to busbar-fixing part 11b with screws 14 using screw holes 13 provided in busbar-fixing part 11b. A plurality of screw holes 13 are formed in the vertical direction and constitute an adjustment section for adjusting the vertical position of bus bar 6. By changing the screw holes 13 to be screwed, the height (vertical position) of bus bar 6 can be changed. Then, the bus bar 6 is placed on the bus bar mounting base 11c and fixed to the bus bar mounting base 11c with the screws 12.

[0016] Here, the stored electrical equipment (not shown) will be described. The electrical equipment, including the power supply unit 8, is rack-mounted, and its width and height are standardized so that it can be attached to the mounting angle 5. Therefore, once the installed power supply unit 8 can be connected to the bus bar 6, it will automatically be possible to connect it to other stored electrical equipment. In this case, the same metal fittings as the current-carrying metal fittings 21 (shown in FIG. 6) used to connect to the power supply unit 8 are used to connect to the bus bar 6.

[0017] Fig. 6 is an enlarged view of part B in Fig. 2, and Fig. 7 is a view of part B from a different angle, illustrating the connection between the bus bar 6 and the power supply unit 8. While Fig. 6 is a view of the cabinet 1 as seen from the left diagonal rear, Fig. 7 is a view of the cabinet 1 as seen from the right diagonal rear. The power supply unit 8 has two plate-shaped output terminals 20 that output DC power, and these output terminals 20 are connected to the conductor bar 7 in the bus bar 6 via conductive fittings 21 (21a, 21b). The output terminal 20 is formed with a hole P1 for screwing the current-carrying fitting 21, and the current-carrying fitting 21 is formed with a hole P2 for screwing the output terminal 20. In addition, the current-carrying fitting 21 has a hole P3 for screwing the bus bar 6.

[0018] The output terminal 20 and the current-carrying metal fitting 21 are connected by screws, and the current-carrying metal fitting 21 and the bus bar 6 are also connected by screws, but neither of these screws are shown here.

[0019] 8 to 11 are diagrams showing the configuration of the central portion of busbar 6 to which power supply unit 8 is connected, and the structure of the central portion of busbar 6 will be described with reference to these diagrams. Note that Fig. 8 is a partial side view of busbar 6, Fig. 9 is a cross-sectional view taken along line CC in Fig. 8, Fig. 10 is a cross-sectional view taken along line DD in Fig. 8, and Fig. 11 is an exploded view. 11, the conductor bar 7 is divided into two parts, and the conductor bar 7 is connected at the center, and a power supply unit 8 is further connected to this connecting part. The conductor bar 7 may be configured as a single bar (two bars for the positive and negative electrodes), or conductor bars 7 of different lengths may be connected together.

[0020] 11, a plurality of screw holes P1 are provided in the output terminal 20 of the power supply unit 8, and a plurality of screw holes P2 are also provided in the connecting current-carrying fitting 21, so that they can be connected with a plurality of screws. Also, a plurality of screw holes P3 and P4 are provided in the connection portion between the current-carrying fitting 21 and the bus bar 6, so that they can be connected with a plurality of screws. By using multiple screws in this way to connect over a relatively wide surface area, the electrical connection between the power supply unit 8 and the bus bar 6 is made robust, and this electrical connection portion forms an upper holding portion that keeps the bus bar 6 in an upright position.

[0021] On the other hand, as shown in Fig. 9, the bus bar 6 has two conductor bars 7 arranged in parallel with an insulating spacer 15 sandwiched between them. Protective plates 6a are arranged on the left and right outer sides of the two conductor bars 7, and are configured so that appropriate portions are pressed from the left and right directions with screws 16 and nuts 16a to tightly fit them together.

[0022] 10 and 11, the connecting portions between the conductor bars 7 are formed by placing gripping members 17 made of an insulator between the four conductor bars 7 (top, bottom, left, and right), and tightly fitting current-carrying metal fittings 21 from the outside of the left and right sides of the conductor bars 7, and connecting them together with screws and nuts or bolts and nuts (neither shown). Holes P3 formed in the current-carrying metal fittings 21, holes P4 formed in the conductor bars 7, and holes P5 formed in the gripping members 17 are holes for inserting the screws or bolts. In this way, the upper and lower conductor bars 7 are connected to each other, and the power supply unit 8 and the bus bar 6 are electrically connected. Furthermore, the protective plate 6a at the portion where the current-carrying fitting 21 is connected to the conductor bar 7 has a notch 6b formed therein, so that the protective plate 6a does not get in the way when connecting the current-carrying fitting 21 to the conductor bar 7.

[0023] In this way, since the lower end of the bus bar 6 is fixed directly to the floor F on which the cabinet 1 is installed, there is no need to connect the lower part of the bus bar 6 to the cabinet 1, and there is no restriction on the wiring space for the electrical equipment stored at least below the cabinet 1. Furthermore, the electrical connection between the bus bar 6 and the power supply unit 8 is the upper fixed portion of the bus bar 6, so the bus bar 6 can be fixed without providing a separate connecting portion with the cabinet 1. Therefore, there is no connection between the bus bar 6 and the cabinet 1, and the wiring space provided around the equipment storage space M is not narrowed by the installation of the bus bar. Furthermore, the anchor 11 has an adjustment portion for adjusting the vertical position of the bus bar 6, so that the positions of the screw holes of the bus bar 6 to be connected can be adjusted relative to the stored rack-mounted equipment, thereby achieving a good connection.

[0024] Fig. 12 shows another embodiment of the anchor 11, and is a perspective view corresponding to Fig. 5. The screw hole 13 formed in the bus bar fixing part 11b is a vertically long hole 13a, which constitutes an adjustment part for continuously changing the height of the bus bar 6. The adjustment portion may be formed as a long hole 13a in this way, allowing for stepless height adjustment.

[0025] In the above embodiment, the power supply unit 8 is disposed in the center of the cabinet 1, but it may be disposed at the top. By disposing the power supply unit 8 in the center or at the top and connecting it to the bus bar 6, the upright state of the bus bar 6 can be stabilized even if the upper end is not connected to the cabinet 1. [Explanation of symbols]

[0026] 1··Cabinet, 2··Bottom frame, 3··Ceiling frame, 4··Vertical frame, 5··Mounting angle, 6··Bus bar, 7··Conductor bar, 8··Power supply unit, 11··Anchor fittings (fixing members), 11a··Floor fixing part, 11b··Bus bar fixing part, 20··Output terminal, 21··Electrical fittings, M··Equipment storage space, F··Floor.

Claims

1. 1. A cabinet bus bar mounting structure for mounting a bus bar to an equipment storage space of a cabinet for storing electrical equipment, the bus bar being used to supply power to the stored electrical equipment, The bottom of the cabinet is open, exposing the floor to the equipment storage space. The bus bar mounting structure for a cabinet is characterized in that the bus bar has a lower end fixed to the exposed floor and is arranged upright in the equipment storage space.

2. a power supply unit for supplying power to the electrical equipment via the bus bar is disposed in the center or above the center of the equipment storage space; 2. The cabinet bus bar mounting structure according to claim 1, wherein an electrical connection portion between the power supply unit and the bus bar functions as an upper fixing portion of the bus bar.

3. The bus bar is connected to a fixing member fixed to a floor and arranged upright, 3. The bus bar mounting structure for a cabinet according to claim 1, wherein the fixing member has an adjustment portion for adjusting the vertical position of the bus bar.

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