JP5011547B2 - Electrical equipment storage box - Google Patents

Description

  The present invention relates to an electrical equipment storage box.

  2. Description of the Related Art Conventionally, there is provided an electric device storage box in which an electric device such as a breaker is stored in a case and attached to a wall surface (for example, see Patent Document 1). The case is composed of a metal substrate to which an electric device is attached on one surface, and a metal side plate surrounding the one surface along the outer edge of the substrate. A screw hole is formed in the substrate, and the substrate and the side plate are fixed to each other by screwing a fixing screw into the screw hole from the outer peripheral surface of the side plate through an insertion hole provided in the side plate.

  And in order to improve the suppression effect of noise and to suppress the danger by an electric shock at the time of electric leakage, it was necessary to make the board | substrate and a side plate conduct | electrically_connected.

  In general, the substrate is surface-coated with a conductive material, and the surface of the side plate is subjected to a coating process in order to improve the appearance.

  Therefore, conventionally, the periphery of the insertion hole of the side plate is scraped and the coating is removed, so that the head of the fixing screw and the surface of the side plate are brought into contact with each other to be conducted, and the substrate and the side plate are brought into conduction through the fixing screw. It was.

Japanese Patent Laid-Open No. 2003-244808

  However, there has been a problem in that the appearance of the side plate deteriorates because the coating on the periphery of the insertion hole of the side plate is scraped off and peeled off. Moreover, since the metal which is the foundation | substrate of a side plate is peeled off and a base plate is exposed, there exists a possibility that a side plate may rust, and rust prevention property fell.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide an electrical equipment storage box capable of conducting a substrate and a side plate with a simple structure without impairing the appearance of the appearance. It is in.

  The electrical equipment storage box of the present invention is formed of a plate-like metal whose surface is coated with a conductive material, and encloses one side of the board along the outer edge of the board, to which the electrical equipment is attached on one side. A frame made of a plate-like metal having conductivity, whose surface is coated with a non-conductive material, and fixed to the substrate, and one or more conductive parts that electrically connect the substrate and the frame The conductive portion has conductivity, and is welded to a metal constituting the frame body, and is erected on an inner peripheral surface of the frame body, and from the outer edge of the substrate, A flange that protrudes toward one surface and has a receiving portion facing at least a part of the outer periphery of the stud bolt, and a nut that is formed of a conductive material and is screwed to the stud bolt. Threaded onto the stud bolt In, characterized in that sandwich the flange portion at the inner peripheral surface of the frame member and the nut.

  In this electrical equipment storage box, it is preferable that the receiving portion is constituted by a notch formed in a substantially U shape.

  In this electrical equipment storage box, the electrical equipment includes an electric power conversion unit that converts an external power supplied via an input terminal into desired power and outputs the electric power to the external equipment via an output terminal, Is provided so that the one surface is along the vertical direction, a first region located at the lower part of the one surface where the input terminal and the output terminal are disposed, and a second region located on both sides of the one surface. And a region other than the first region and the second region on the one surface, and the third region in which the power conversion unit is disposed, and the conductive portion is the first region It is preferable to be provided in one region or the second region.

  As described above, the present invention has an effect that the substrate and the side plate can be conducted with a simple structure without impairing the appearance.

It is an external appearance perspective view which shows the structure of the electroconductive part in the electric equipment storage box of this invention. It is an external appearance exploded perspective view of an electric equipment storage box same as the above. It is a front view same as the above. It is a front view which shows the structure of a power distribution apparatus same as the above. (A) (b) It is a perspective view which shows the structure of the electroconductive part same as the above.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment)
An external exploded perspective view of the electrical equipment storage box of this embodiment is shown in FIG. 2, and a front view is shown in FIG. Note that, with reference to the up / down / left / right direction in FIG. In the electrical equipment storage box of the present embodiment, a power distribution device 5 (electrical equipment) is stored in a rectangular box-shaped case 1 and attached to a wall surface formed in the vertical and horizontal directions. The case 1 includes a substrate 2 to which the power distribution device 5 is attached on the front surface, a side plate 3 (frame body) that surrounds the front surface side of the substrate 2 along the outer edge of the substrate 2 from four sides, and a cover that covers the opening of the side plate 3 from the front. 4.

  The substrate 2 is formed of a substantially rectangular metal plate, and the surface is coated with a conductive material such as plating. In addition, the power distribution device 5 is attached to the front surface of the substrate 2.

  The side plate 3 is formed of a metal plate that surrounds the front side of the substrate 2 in a frame shape along the outer edge of the substrate 2. The side plate 3 has a surface coated with a non-conductive material.

  In addition, the case 1 is provided with a fixing portion 1 a that fixes the substrate 2 and the side plate 3. The fixing portion 1a includes a fixing screw 1b, a screw hole 21a formed in the substrate 2 and screwed into the fixing screw 1b, and an insertion hole 3a formed in the side plate 3 and through which the fixing screw 1b is inserted. A flange portion 21 is formed facing the inner peripheral surface of the side plate 3 from the outer edge of the substrate 2 toward the rear, and a screw hole 21 a is formed in the flange portion 21. Further, an insertion hole 3 a is formed at a position facing the screw hole 21 a in the vicinity of the rear end of the side plate 3. Then, the fixing screw 1a is screwed into the screw hole 21a through the insertion hole 3a from the outer peripheral surface of the side plate 3, whereby the substrate 2 and the side plate 3 are fixed to each other. In addition, the fixing | fixed part 1a of this embodiment is provided in three places in the upper surface of case 1, and is provided in two places in the lower surface. The three fixing portions 1a provided on the upper surface of the case 1 are spaced apart at equal intervals in the left-right direction, and the two fixing portions 1a provided on the lower surface of the case 1 are arranged at both left and right ends provided on the upper surface of the case 1. It is provided in the position which opposes the fixing | fixed part 1a of an up-down direction.

  The cover 4 is formed in a rectangular box shape with an open rear surface. The cover 4 includes a rectangular front surface 41 and a four-circumferential surface 42 formed rearward from the outer peripheral edge of the front surface 41. And the collar part 31 is formed toward the front from the outer edge of the side plate 3, and the cover 4 covers the side plate 3 from the front so that the outer peripheral surface of the collar part 31, the four peripheral surfaces 42, and the inner peripheral surface face each other. Is done. In addition, a locking hole (not shown) is formed in the flange portion 31 provided on the upper surface of the side plate 3, and a locking claw (not shown) provided on the upper surface of the four circumferential surface 42 is locked in the locking hole. . Further, a screw hole 31 a is formed in the flange portion 31 provided on the lower surface of the side plate 3 at a position facing the screw hole 3 a provided on the lower surface of the side plate 3 in the front-rear direction. An insertion hole (not shown) facing the screw hole 31a is formed on the lower surface of the four circumferential surface 42, and the fixing screw 1c is screwed into the screw hole 31a from the outer circumferential surface of the four circumferential surface 42 through the insertion hole. By doing so, the cover 4 and the side plate 3 are fixed to each other.

  In addition, an operation window 41 a that is opened in a rectangular shape is formed on the right side of the front surface 41 of the cover 4. And the operation part 54a of the power distribution apparatus 5 mentioned later is exposed from the operation window 42a, and can operate the operation part 54a also in the state which attached the cover 4. FIG.

  Next, the power distribution apparatus 5 will be described with reference to FIG. The power distribution device 5 of the present embodiment is a device that converts input power from an external power source (DC power source, AC power source) and a built-in battery 52 into desired DC power and outputs it. The power distribution device 5 includes a terminal unit 51 connected to the outside, a battery 52, a power conversion unit 53 that converts input power into desired DC power, and a control unit 54 that controls the operation of the power conversion unit 53. Has been.

  The power converter 53 includes a DC / DC converter 53a that converts DC power output from the DC power source or the battery 52 into desired DC power, and AC / AC that converts AC power output from the AC power source into desired DC power. And a DC converter 53b.

  The terminal portion 51 is configured by arranging four types of terminals in parallel in the left-right direction. A DC power input terminal 51a, an AC power input terminal 51b, an output terminal 51c, and a communication terminal 51d are arranged in this order from the left. Has been. In this embodiment, a photovoltaic power generation system is provided outside as a DC power supply, and the output of the photovoltaic power generation system is connected to a DC power input terminal 51a. Then, the DC power output from the photovoltaic power generation system is supplied to the DC / DC converter 53a of the power converter 53 via the DC power supply input terminal 51a.

  A commercial power supply (AC power supply) is connected to the AC power supply input terminal 51b. Then, AC power output from the commercial power supply is supplied to the AC / DC converter 53b of the power converter 53 via the AC power input terminal 51b.

  Further, the DC power of the battery 52 built in the power distribution device 5 is also supplied to the DC / DC converter 53 a of the power conversion unit 53. In addition, the DC / DC converter 53a of the present embodiment has a function of charging the battery 52 using DC power from the solar power generation system.

  That is, the power conversion unit 53 is supplied with DC power from the solar cell and the battery 52 as input power, and AC power is supplied from a commercial power source. Then, the DC / DC converter 53a or the AC / DC converter 53b generates desired DC power and outputs it to an external device via the output terminal 51c.

  The control unit 54 is provided with a circuit including a microcomputer that controls the operation of the power conversion unit 53. In addition, in order for the user to control the operation of the DC / DC converter 53a and the AC / DC converter 53b, the operation unit 54 is provided with an operation unit 54a including a plurality of buttons and a display unit.

  In addition, the terminal unit 51 is provided with a communication terminal 51d for connecting to an external communication device, and the operation of the power conversion unit 53 can be monitored and controlled.

  In addition, the battery 52, the power conversion unit 53, and the control unit 54 are provided with protective covers 52a, 53c, and 54b for protecting the inside by enclosing each of them, and also have a separator function for isolating the respective units 52 to 54. is doing.

  The case 1 is divided into three types of regions (first to third regions 11 to 13). The outline of each area | region 11-13 is shown in FIG. 4 using a thick line. The first region 11 is located below the substrate 2, the second region 12 is located on both sides of the substrate 2, and the third region 13 is the first region 11 and the second region 12. It is an area other than.

  The first region 11 is formed in a substantially rectangular shape that is long in the left-right direction, and is located at the bottom of the substrate 2. And since the terminal part 51 is provided in the upper part in the 1st area | region 11, and the cable from the outside is connected to the terminal part 51, the 1st area | region 11 forms what is called a construction area | region. In the first region 11, a construction space where nothing is provided below the terminal portion 51 is formed. Therefore, when the electrical equipment storage box is installed above the wall surface and the external cable is inserted from below the terminal portion 51, the workability of the user is improved by the construction space below the terminal portion 51.

  The second area 12 is a so-called safety area, and includes a left area 12 a located at the left part of the substrate 2 and a right area 12 b located at the right part of the substrate 2. The left region 12a is formed in a substantially rectangular shape that is long in the vertical direction, and the battery 52 is provided so as to be biased to the right.

  In addition, a buffer space in which nothing is provided is formed except for a portion in the left region 12a where the battery 52 is provided. The right region 12b is formed in a substantially rectangular shape that is long in the vertical direction, and the entire right region 12b is a buffer space in which nothing is provided. For example, when the side part of the electric equipment storage box is caused to collide during transportation, the shock is buffered by the buffer space, and the shock to the power conversion unit 53 disposed in the center can be suppressed.

  Further, when the substrate 2 is fixed to the wall surface with fixing screws (not shown) through the insertion holes 2a provided in the vicinity of the four corners of the substrate 2, the positions of other devices arranged in the second region 12 are limited. This makes it easy for users to work.

  The third region 13 is formed in an approximately L shape, and is located above the first region 11 and between the first region 11 and the right region 12b. Further, the power conversion unit 53 is disposed above the first region 11 in the third region 13, and the control unit 54 is disposed between the first region 11 and the right region 12b. Further, most of the third region 13 is disposed above the first region 11 which is a construction region. Therefore, there is no possibility that parts such as terminal screws may fall during construction such as connecting an external cable to the terminal portion 51 and enter the power conversion portion 53 provided in the third region 13.

  In addition, the electrical equipment storage box of this embodiment is characterized in that a conductive portion 6 that conducts the substrate 2 and the side plate 3 is provided. FIG. 1 is an exploded external perspective view of the electrical equipment storage box showing the configuration of the conductive portion 6. The conductive portion 6 is provided at substantially the center of the lower end in the first region 2a. The conductive portion 6 includes a stud bolt 61 erected on the inner peripheral surface of the side plate 3, a flange portion 62 protruding forward from the outer edge of the substrate 2, and a nut 63 screwed to the stud bolt 61. Has been. The conductive portion 6 will be described in detail with reference to partially enlarged views shown in FIGS.

  FIG. 5A is an enlarged view showing the conductive portion 6 in an exploded state, and FIG. 5B is an enlarged view showing the conductive portion 6 in a fixed state.

  The conductive portion 6 includes a stud bolt 61, a flange portion 62, and a nut 63. The stud bolt 61 is formed of a columnar metal having conductivity, and a thread groove that is screwed into the nut 63 is formed on the outer peripheral surface. The stud bolt 61 is erected by being welded to the metal constituting the side plate 3 in the vicinity of the rear end at a substantially horizontal center on the inner peripheral surface of the lower surface of the side plate 3. Since the stud bolt 61 is welded to the metal constituting the side plate 3, the stud bolt 61 and the side plate 3 are electrically connected to each other.

  The flange portion 62 is formed in a substantially rectangular plate shape integrally formed with the substrate 2, and protrudes forward from a substantially horizontal center at the lower end of the substrate 2. The lower surface of the flange portion 62 faces the inner peripheral surface of the side plate 3.

  Further, a notch 62a (receiving portion) is formed rearwardly at a substantially horizontal center at the front end of the flange portion 62. The notch 62 a is formed in a substantially U shape with the front opening, and the opening width is slightly larger than the diameter of the stud bolt 61. Therefore, when the substrate 2 and the side plate 3 are fixed, the stud bolt 61 enters the notch 62a through the opening, and the substantially semicircular arc inner peripheral surface of the notch 62a and one of the outer peripheral surfaces of the stud bolt 61 are fixed. The part faces.

  The nut 63 has conductivity and is formed of a flange nut that is screwed to the stud bolt 61, and a disk-shaped flange portion 63a is formed on the lower surface.

  Then, as shown in FIG. 5B, the nut 63 is screwed to the stud bolt 61 in a state where the stud bolt 61 is inserted into the notch 62 a of the flange portion 62. The nut 63 is screwed into the stud bolt 61 so that the flange 62 of the substrate 2 is fixed between the lower surface of the flange 63a of the nut 63 and the inner peripheral surface of the side plate 3 at the periphery of the stud bolt 61. The Therefore, the peripheral edge of the notch 62a on the upper surface of the flange 62 and the lower surface of the flange 63a of the nut 63 come into contact with each other, so that the flange 62 and the nut 63 are electrically connected. Further, since the nut 63 is screwed to the stud bolt 61, the nut 63 and the stud bolt 61 are electrically connected. Therefore, the flange 62 and the stud bolt 61 are electrically connected via the nut 63. The flange 62 is integrally formed with the substrate 2 and the stud bolt 61 is welded to the metal constituting the side plate 3, so that the substrate 2 and the side plate 3 are electrically connected via the conductive portion 6.

  When the substrate 2 and the side plate 3 are electrically connected to each other, it is possible to suppress a danger due to an electric shock at the time of electric leakage and improve a noise suppressing effect.

  Further, since the conductive portion 6 is provided inside the case 1 and there is no need to peel off the coating on the side plate 3 as in the prior art, rust prevention can be maintained without deteriorating the appearance.

  Further, when the side plate 3 is fixed to the substrate 2 when the case 1 is assembled, the stud bolt 61 enters the notch 62a. Therefore, the substrate 2 and the side plate 3 can be easily conducted simply by screwing the nut 63 into the stud bolt 61.

  In addition, the conductive portion 6 of the present embodiment is provided below the first region 11. Therefore, even if parts such as the nut 63 are accidentally dropped, there is no risk of entering the power distribution device 5, so that a failure or accident of the power distribution device 5 can be prevented.

In the present embodiment, the conductive portion 6 is provided below the first region 11, but the conductive portion 6 may be provided in the second region 12. Since the second region 12 limits the position of the device to be arranged, the conductive portion 6 does not interfere with other devices such as the power distribution device 5.
In the present embodiment, one conductive portion 6 is provided, but a plurality of conductive portions 6 may be further provided in the first region 11 or the second region 12. Thereby, the electrical resistance between the board | substrate 2 and the side plate 3 reduces, and while further suppressing the danger by an electric shock at the time of a leak, the noise suppression effect can be improved further.

DESCRIPTION OF SYMBOLS 1 Case 2 Board | substrate 3 Side plate 5 Power distribution apparatus 6 Conductive part 61 Stud bolt 62 ridge part 63 Nut

Claims (3)

A substrate whose surface is formed of a plate-like metal coated with a conductive material, and an electrical device is attached to one surface;
A frame body made of a conductive plate-like metal surrounding one side of the substrate along the outer edge of the substrate, the surface of which is coated with a non-conductive material, and fixed to the substrate;
Comprising one or more conductive portions that electrically connect the substrate and the frame,
The conductive portion has conductivity, and a stud bolt that is erected on an inner peripheral surface of the frame body by being welded to a metal constituting the frame body,
A flange that protrudes from the outer edge of the substrate toward the one surface and has a receiving portion facing at least a part of the outer periphery of the stud bolt, and a nut that is formed of a conductive material and is screwed to the stud bolt. And
The electrical equipment storage box, wherein the nut is screwed into the stud bolt so that the flange is sandwiched between the nut and the inner peripheral surface of the frame.   The electric device storage box according to claim 1, wherein the receiving portion is formed by a notch formed in a substantially U shape. The electrical device includes a power conversion unit that converts an external power source supplied via an input terminal into desired power and outputs the power to the external device via an output terminal.
The substrate is provided so that the one surface is along the vertical direction, and is positioned at a lower portion of the one surface, the first region where the input terminal and the output terminal are disposed, and both sides of the one surface. A second region and a region other than the first region and the second region on the one surface, and a third region in which the power converter is disposed;
The electrical equipment storage box according to claim 1, wherein the conductive portion is provided in the first region or the second region.

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