JP2019067630A - Plug device and power distribution system - Google Patents

Abstract

A plug device that is easily connected to a grounding conductor of a wiring duct before being electrically connected to a power supply conductor of the wiring duct when connected to the wiring duct, and the plug device. A power distribution system comprising: A plug device (200) includes a main body (81), a connecting part (82) protruding from the main part (81), a power supply terminal (70) inside the connecting part (82), and a main arrangement surface (845) as a side surface (84) of the connecting part (82). And a ground connection terminal 51 arranged along. The ground connection terminal 51 is connected to the ground of the wiring duct 100 before the power supply terminal 70 is electrically connected to the power supply conductor of the wiring duct 100 in the process of connecting the plug device 200 to the wiring duct 100. It is arranged at a position electrically connected to the conductor for use. [Selection diagram] FIG.

Description

  The present invention relates generally to plug devices and power distribution systems, and more particularly to plug devices connected to wiring ducts with feed conductors and power distribution systems with wiring ducts and plug devices.

  BACKGROUND Conventionally, there is a power distribution system in which a plug device is attached to a wiring duct including a power supply conductor and power is supplied to an electric device through the wiring duct and the plug device (for example, see Patent Document 1). Power distribution systems are installed in facilities where a large number of electrical devices are used, such as factories and data centers.

  In general, when connecting the wiring duct and the plug device, not only electrically connects the plug device to the power supply conductor of the wiring duct, but also electrically connects the plug device to the ground conductor of the wiring duct Is required.

JP 2014-225353 A

  When the plug device is connected to the wiring duct, if the grounding wire is electrically connected after the feeding wire is electrically connected, the grounding wire is electrically connected although it is a short time Although not done, the power supply wiring may be electrically connected. In view of the recent tightening of safety standards, it is desirable that no electrical connection is made to the grounding conductor even for a short time.

  The present invention relates to a plug device which is easy to be electrically connected to a grounding conductor of a wiring duct before being electrically connected to a feeding conductor of the wiring duct when connected to the wiring duct. It is an object of the present invention to provide a power distribution system provided with a device.

  The plug device according to one aspect of the present invention is connected to a wiring duct including a power supply conductor and a grounding conductor. The plug device includes a main body portion, and a connection portion that protrudes from the main body portion and is disposed in an internal space of the wiring duct in a state where the plug device is connected to the wiring duct. The plug device also includes a feed terminal that is inside the connection portion and that is electrically connected to the power supply conductor when the plug device is connected to the wiring duct. The connection portion has a main disposition surface which is a side surface facing in a direction orthogonal to the protruding direction of the connection portion. The plug device also includes a ground connection terminal disposed along the main disposition surface and electrically connected to the ground conductor in a state of being connected to the wiring duct. The ground connection terminal is disposed at a position where the ground connection terminal is electrically connected to the ground conductor before the power supply terminal is electrically connected to the power supply conductor in the connection process. The connection process is a process from when the plug device is not connected to the wiring duct to when it is connected.

  A power distribution system according to an aspect of the present invention includes the plug device and a wiring duct to which the plug device is connected.

  In one aspect of the present invention, when the plug device is connected to the wiring duct, the plug device is electrically connected to the grounding conductor of the wiring duct before being electrically connected to the power feeding conductor of the wiring duct. Has the advantage of being easy to

FIG. 1 is a perspective view of a plug device and a power distribution system according to an embodiment of the present invention. FIG. 2A is a perspective view of a wiring duct in the above power distribution system, and FIG. 2B is a cross-sectional view of the wiring duct. 3A and 3B are perspective views of the plug device according to the first embodiment in the power distribution system same as the above. FIG. 4A is a perspective view of a combination of a connection member and a grounding member in the plug device according to Embodiment 1 of the same, and FIG. 4B is a perspective view of only the grounding member of the same. FIG. 5: is sectional drawing which shows the process of connecting the plug apparatus which concerns on Embodiment 1 to the wiring duct in the power distribution system same as the above. FIG. 6 is a cross-sectional view showing the process of connecting the plug device according to the first embodiment to the wiring duct in the above power distribution system. FIG. 7 is a cross-sectional view showing the process of connecting the plug device according to the first embodiment to the wiring duct in the above power distribution system. FIG. 8 is a perspective view of the plug device according to Embodiment 2 in the power distribution system of the same. FIG. 9 is a perspective view of a combination of a ground plate and a ground connection terminal in the plug device according to Embodiment 2 of the same. FIG. 10: is sectional drawing which shows the process of connecting the plug apparatus which concerns on Embodiment 2 to the wiring duct in the power distribution system same as the above. FIG. 11 is a cross-sectional view showing the step of connecting the plug device according to the second embodiment to the wiring duct in the power distribution system of the same. FIG. 12 is a cross-sectional view showing a step of connecting the plug device according to the second embodiment to the wiring duct in the power distribution system of the same.

  The plug apparatus 200 which concerns on this embodiment shown in FIG. 1, and the power distribution system 300 provided with the plug apparatus 200 and the wiring duct 100 are demonstrated.

  The power distribution system 300 including the wiring duct 100 and the plug device 200 is used, for example, to supply power to electrical devices and the like in a facility. The wiring duct 100 is installed, for example, in a facility and constitutes a power supply path. By connecting the plug device 200 connected to the electric device or the like to an appropriate position in the wiring duct 100, power can be supplied to the electric device or the like through the wiring duct 100 and the plug device 200. The power distribution system 300 is installed in a facility where a large number of electrical devices are used, such as a factory and a data center.

  In the power distribution system 300 shown in FIG. 1, the long wiring duct 100 is installed so that the longitudinal direction is along one horizontal direction. The plug device 201 according to the first embodiment, which is the plug device 200, is connected to the upper surface of the wiring duct 100. The plug device 202 according to the second embodiment, which is the plug device 200, is connected to the surface of the wiring duct 100 facing downward. The plug device 200 may be connected to only the surface facing upward of the wiring duct 100 or only the surface facing downward. Further, the wiring duct 100 is installed in a posture rotated 90 ° around the axis along the longitudinal direction of the wiring duct 100 with respect to the posture shown in FIG. 1, and the plug device 200 is connected to the side surface of the wiring duct 100 It may be done. Wiring duct 100 may be installed in various postures, such as a posture in which the longitudinal direction follows the vertical direction.

  In the following description, with the distribution system 300 installed as shown in FIG. 1, the direction perpendicular (perpendicular) to the horizontal plane is referred to as “vertical direction”, and the lower side (vertical) in the vertical direction is “downward”. "," Will be described as "upper". Further, the longitudinal direction of the wiring duct 100 will be referred to as “left and right direction”, and a direction orthogonal to both “vertical direction” and “left and right direction” will be described as “front and back direction”. Moreover, the side where the ground connection terminal 51 is present with respect to the connection portion 82 of the embodiment 1 described later is described as “forward” and the side opposite to “front” is “backward”. Furthermore, when the power distribution system 300 is viewed from the front, the left side will be described as “left” and the right side will be described as “right”. Arrows indicating “vertical direction”, “longitudinal direction”, and “horizontal direction” in the drawings are merely shown for the purpose of explanation and do not have any substance. These directions do not mean that the installation state of the power distribution system 300 is limited.

  Further, in the following description, the orthogonal direction does not mean only the exact 90 ° direction, but in view of technical common sense, as long as the present embodiment exerts the intended function, it may be regarded as the 90 ° direction. Also includes the direction.

  Hereinafter, electrically connecting the ground conductor in the wiring duct 100 and the ground connection terminal 51 in the plug device 200 may be referred to as ground connection. Hereinafter, electrically connecting the feeding conductor 30 in the wiring duct 100 and the feeding terminal 70 in the plug device 200 may be referred to as feeding connection.

  The plug device 200 according to the present embodiment shown in FIGS. 3A to 12 is connected to a wiring duct 100 (see FIGS. 2A and 2B) including a power supply conductor 30 and a ground conductor. The plug device 200 includes a main body portion 81, a connection portion 82, a feed terminal 70, and an earth connection terminal 51 (in particular, refer to FIGS. 3A, 3B and 8). The connection portion 82 protrudes from the main body portion 81. The connection portion 82 is disposed in the internal space 13 of the wiring duct 100 in a state where the plug device 200 is connected to the wiring duct 100. The feed terminal 70 is disposed inside the connection portion 82. The connection portion 82 has a main disposition surface 845 which is a side surface 84 facing in a direction orthogonal to the direction in which the connection portion 82 protrudes. The main disposition surface 845 may face any direction as long as it is a direction orthogonal to the direction in which the connection portion 82 protrudes. The feeding terminal 70 is electrically connected to the feeding conductor 30 in a state where the plug device 200 is connected to the wiring duct 100. The ground connection terminal 51 is disposed along the side surface 84 facing in a direction orthogonal to the direction in which the connection portion 82 in the connection portion 82 protrudes. The ground connection terminal 51 is electrically connected to the grounding conductor in a state where the plug device 200 is connected to the wiring duct 100. In the connection process, the ground connection terminal 51 is disposed at a position where the ground connection terminal 51 is electrically connected to the ground conductor before the power supply terminal 70 is electrically connected to the feed conductor 30. The connection process is a process until the plug device 200 is changed from the state where it is not connected to the wiring duct 100.

  A power distribution system 300 according to the present embodiment includes the plug device 200 described above and a wiring duct 100 (see FIG. 1).

  In the present embodiment, when the plug device 200 is connected to the wiring duct 100, the plug device 200 is electrically connected to the grounding conductor of the wiring duct 100 before the plug device 200 is electrically connected to the power supply conductor 30 of the wiring duct 100. It is easy to be connected to.

  Hereinafter, the plug device 200 and the power distribution system 300 will be described more specifically. Although the distribution system in plug device 200 and distribution system 300 described below is a single-phase three-wire distribution system, it may be, for example, a three-phase three-wire distribution system, and a three-phase four-wire distribution system It may be. The plug device 200 and the power distribution system 300 can be appropriately changed in design according to the power distribution system.

  First, the wiring duct 100 to which the plug device 200 is connected will be described (see FIGS. 2A and 2B). Wiring duct 100 includes a hollow frame 10 having conductivity, a holding portion 20 held by frame 10 in internal space 13 of frame 10, and a power supply held by holding portion 20 in internal space 13 of frame 10. And a conductor 30. In the present embodiment, the frame 10 is a ground conductor in the plug device 200. The frame 10 has a ground terminal 11.

  The frame 10 is made of metal, for example. The frame 10 has a length. That is, the frame 10 is long. The frame 10 is tubular, and the axis of the tube is along the longitudinal direction of the frame 10, that is, in the left-right direction. The frame 10 is configured by combining two folded plate members 14, 14.

  The frame 10 has a connection port 12 connecting the inner space 13 of the frame 10 and the outer space of the frame 10. The opening direction of the connection port 12 is orthogonal to the longitudinal direction of the frame 10. Note that the direction in which the connection port 12 opens is the direction in which the connection port 12 faces the outer space of the frame 10. In the present embodiment, the connection port 12 is rectangular. The frame 10 can have a plurality of connections 12. For example, the frame 10 has a connection port 12 (connection port 121) opening upward and another connection port 12 (connection port 122) opening downward. The frame 10 may have a plurality of connection ports 121 opened upward, and these may be aligned in the longitudinal direction of the frame 10. The frame 10 may further have a plurality of connection ports 122 opened downward, and these may be aligned in the longitudinal direction of the frame 10. That is, the position and number of the connection ports 12 can be changed as appropriate.

  The outer surface of the frame 10 may be painted as required. However, the inner circumferential surface of the connection port 12 in the frame 10 is not painted but is exposed to the outside. The inner peripheral surface of the connection port 12 is the ground terminal 11 in the present embodiment.

  The frame 10 has two side surfaces 15 facing in opposite directions (forward and backward in this embodiment). The direction in which each side surface 15 faces is orthogonal to the opening direction of any connection port 12. Each side surface 15 is provided with a recessed groove 16 having a length along the longitudinal direction of the frame 10.

  The holding unit 20 has electrical insulation, and is made of, for example, a synthetic resin. The holding unit 20 is held on the inner surface of the frame 10 in the inner space 13 of the frame 10. In the present embodiment, the wiring duct 100 includes a plurality of holding portions 20, which are aligned in the longitudinal direction of the frame 10. The holding portions 20 are alternately arranged on the surface facing downward and the surface facing upward on the inner surface of the frame 10. The connection port 12 is formed at a position where the holding portion 20 in the frame 10 is not disposed. The holding portion 20 has a recess 21 for holding the power supply conductor 30. The number of recesses 21 is the same as the number of feed conductors 30, and is three in the present embodiment. The recesses 21 are aligned in the front-rear direction.

  In the present embodiment, the wiring duct 100 includes three power supply conductors 30. The three feed conductors 30 are, for example, an S pole, an R pole, and a T pole of a single-phase three-wire wiring, respectively. The feed conductor 30 has conductivity, and is made of metal, for example. The feed conductor 30 has a rod-like shape having a length along the longitudinal direction of the frame 10. The three power supply conductors 30 are held by the holding portion 20 by being fitted into the recesses 21 of the holding portion 20, respectively. That is, the three feed conductors 30 are arranged in the front-rear direction. The cross-sectional shape of the feeding conductor 30 orthogonal to the longitudinal direction of the frame 10 is a rectangular shape having long sides along the vertical direction.

  Hereinafter, the plug device 200 (201) according to the first embodiment and the plug device (202) according to the second embodiment will be described with respect to the plug device 200.

(Embodiment 1)
The plug device 201 according to the first embodiment will be described with reference to FIGS. 3A to 7. As shown in FIGS. 3A and 3B, the plug device 201 according to the first embodiment includes a main body portion 81 and a connection portion 82 projecting from the main body portion 81. The connection portion 82 protrudes from one surface 53 of the main body portion 81 (hereinafter, referred to as an opposing surface 53). In the first embodiment, the facing surface 53 faces downward. The facing surface 53 faces the wiring duct 100 in a state where the plug device 201 is connected to the wiring duct 100. A cable 400 is connected to the plug device 201. The cable 400 has a ground wire electrically connected to the ground connection terminal 51 in the plug device 201 and a wire electrically connected to the power supply terminal 70 in the plug device 201. The cable 400 is connected to the left end of the main body 81. In the first embodiment, the plug device 201 further includes a circuit breaker. The circuit breaker is electrically connected between the feed terminal 70 and the electric wire. The circuit breaker is housed in the main body 81.

  The connection portion 82 has a dimension slightly smaller than the connection port 12 when viewed from below, and has a shape that can be fitted into the connection port 12. The connection portion 82 has an exposure port 83 opened downward. Further, the connecting portion 82 includes four side surfaces 84 (first side surface 841, second side surface 842, third side surface 843 and fourth side surface 844) respectively facing in four different directions orthogonal to the projecting direction of the connecting portion 82. Have. The first side surface 841 and the second side surface 842 face forward and backward, respectively, and face in opposite directions. The third side 843 and the fourth side 844 turn to the right and to the left, respectively, and turn to the opposite direction. Inside the connection portion 82, there are three terminal chambers 822 aligned in the front-rear direction. The connection portion 82 also has an inner wall 823 separating the adjacent terminal chambers 822. Each terminal chamber 822 communicates with the outside of the connection portion 82 at the exposure port 83. The connecting portion 82 has, on the third side surface 843, three recesses 851 connecting the inside and the outside of the connecting portion 82, and each recess 851 opens downward. The three recesses 851 communicate with the three terminal chambers 822 respectively. The connection portion 82 also has, on the fourth side surface 844, three recesses 852 connecting the inside and the outside of the connection portion 82, and each recess 852 opens downward. These three recesses 852 also lead to the three terminal chambers 822 respectively.

  The plug device 200 also includes a base 86 housed inside the main body 81, and the connecting part 82 and the base 86 constitute a connecting member 87 which is an integral member (see FIG. 4A). A connecting portion 82 protrudes downward from the lower surface of the base 86. The lower surface of the base 86 has a support surface 861 surrounding the connection 82.

  The plug device 201 comprises three feed terminals 70 (see FIGS. 5 to 7). The three feed terminals 70 are disposed in the three terminal chambers 822 respectively. The feed terminal 70 has conductivity, and is made of metal, for example. Each feed terminal 70 has two opposing receiving plates 71, and the lower end portions of the receiving plates 71 are in contact with each other. The feed terminal 70 may have any other appropriate shape according to the shape of the feed conductor 30, etc., in addition to the present embodiment. The feed terminal 70 is electrically connected to the wire in the cable 400.

  The ground connection terminal 51 is disposed along the main disposition surface 845 which is the side surface 84 of the connection portion 82. The plug device 201 further includes a second ground connection terminal 52, and the second ground connection terminal 52 is a sub layout surface that is a side surface 84 of the ground connection terminal 51 that faces in the direction opposite to the direction of the main disposition surface 845. It is arranged along 846. In the first embodiment, the main disposition surface 845 is a first side surface 841 and the sub disposition surface 846 is a second side surface 842. However, as long as the main disposition surface 845 and the sub disposition surface 846 face in the opposite direction, the main disposition surface 845 and the sub disposition surface 846 may be any side surface 84. For example, the main disposition surface 845 may be the second side surface 842 and the sub disposition surface 846 may be the first side surface 841. The main disposition surface 845 may be the third side surface 843 and the sub disposition surface 846 may be the fourth side surface 844. The main disposition surface 845 may be the fourth side surface 844 and the sub disposition surface 846 may be the third side surface 843.

  The ground connection terminal 51 and the second ground connection terminal 52 are electrically connected to the grounding conductor (that is, the frame 10) in a state where the plug device 200 is connected to the wiring duct 100.

  Each of the ground connection terminal 51 and the second ground connection terminal 52 has conductivity, and is made of metal such as copper. The ground connection terminal 51 has a base 54 projecting downward from the facing surface 53 and in contact with the first side surface 841 and a leaf spring 55 projecting from the base 54 (see particularly FIGS. 4A and 4B).

  The plate spring 55 has a thickness, and the direction of the thickness is along the direction in which the main disposition surface 845 faces. The leaf spring 55 has a fixed end 551 and a free end 552. When no external force is applied to the plate spring 55, the position of the free end 552 along the direction in which the connection portion 82 protrudes is on the main body 81 side with respect to the fixed end 551. In the state where no external force is applied to the plate spring 55, the position of the free end 552 along the direction in which the main disposition surface 845 faces is on the opposite side of the fixed end 551 from the main disposition surface 845. In the first embodiment, the fixed end 551 is connected to the lower end of the base 54. The free end 552 is above the fixed end 551 and in front of the fixed end 551. Thus, the plate spring 55 generally has an inclined shape such that the fixed end 551 is located forward of the free end 552 in the vertical direction.

  The leaf spring 55 further has a bend 553 between the fixed end 551 and the free end 552. The inclination of the portion from the fixed end 551 to the bending portion 553 in the plate spring 55 with respect to the direction in which the connection portion 82 protrudes is the direction in which the portion 82 from the bending portion 553 to the free end 552 in the plate spring 55 protrudes. Greater than the slope for In the first embodiment, the leaf spring 55 is flat and has a bent portion at only one position between the fixed end 551 and the free end 552. The bent portion is a bent portion 553. The bend 553 is above the fixed end 551 and in front of the fixed end 551. The free end 552 is above the inflection 553 and in front of the inflection 553. Further, the inclination of the portion from the fixed end 551 to the bending portion 553 in the leaf spring 55 with respect to the vertical direction is larger than the inclination in the vertical direction of the portion from the bending portion 553 to the free end 552 in the leaf spring 55. Further, in the first embodiment, the dimension between the bending portion 553 and the fixed end 551 in the plate spring 55 is smaller than the dimension between the bending portion 553 and the free end 552.

  Furthermore, the plate spring 55 has a first contact portion 554 between the fixed end 551 and the bending portion 553, which contacts the grounding conductor first when the plate spring 55 contacts the grounding conductor in the connection process. The leaf spring 55 also has a second contact portion 555 between the bending portion 553 and the free end 552 in contact with the grounding conductor in a state where the plug device 200 is connected to the wiring duct 100. The dimension between the bending portion 553 and the first contact portion 554 is smaller than the dimension between the bending portion 553 and the second contact portion 555. The manner of contact between the ground connection terminal 51 and the ground terminal 11 in the ground conductor in the connection process will be described later again.

  The second ground connection terminal 52 is conductive and made of metal such as copper. The second ground connection terminal 52 includes a base 56 projecting downward from the facing surface 53 and in contact with the second side surface 842 and a leaf spring 57 projecting from the base 56. The leaf spring 57 has a fixed end, a free end and a bent portion similar to the case of the ground connection terminal 51.

  The dimension of the ground connection terminal 51 in the projecting direction of the connection portion 82 is larger than the dimension of the second ground connection terminal 52 in the projecting direction of the connection portion 82. In the first embodiment, the dimension in the vertical direction of the entire ground connection terminal 51 is larger than the dimension in the vertical direction of the entire second ground connection terminal 52. The dimension of the plate spring 55 of the ground connection terminal 51 in the vertical direction is also larger than the dimension of the plate spring 57 of the second ground connection terminal 52 in the vertical direction. Furthermore, the vertical position of the fixed end 551 of the plate spring 55 in the ground connection terminal 51 (ie, the position in the direction along the direction in which the connection portion 82 protrudes) is the vertical position of the fixed end in the second ground connection terminal 52. Rather, it is on the lower side (i.e., the protruding direction side of the connection portion 82).

  The plug device 201 includes a ground member 58 (see FIGS. 4A and 4B), and the ground connection terminal 51 and the second ground connection terminal 52 are part of the ground member 58. The ground member 58 includes a frame 581 surrounding the connection portion 82, and a ground connection terminal 51 and a second ground connection terminal 52 protruding from the frame 581. The frame 581 has a rectangular frame shape, and has an opening at a position where the connection portion 82 is disposed. The frame 581 has a first frame portion 583 disposed along the first side surface 841 and a second frame portion 584 disposed along the second side surface 842 and includes the first frame portion 583 and the second frame portion 584. The frame portion 584 is opposed via the opening. The ground connection terminal 51 and the second ground connection terminal 52 protrude from the first frame 583 and the second frame 584, respectively. The frame 581 also has a mounting hole 582.

  The ground member 58 is fixed to the connection member 87. Thus, the frame 581 of the ground member 58 is disposed on the support surface 861 of the base 86, the ground connection terminal 51 is disposed along the first side surface 841 of the connection portion 82, and the second ground connection terminal 52 is It is disposed along the second side 842 of the connecting portion 82. A boss 863 protrudes from the support surface 861, and the boss 863 is inserted into the mounting hole 582 of the frame 581 and thermally caulked. Thus, the ground member 58 is fixed to the connection member 87. Note that the ground member 58 may be fixed to the connection member 87 by another appropriate method. The ground member 58 may be fixed to the connection member 87 by, for example, integrally molding the connection member 87 with the ground member 58 by an insert molding method. The grounding member 58 is not fixed to the connection member 87 but may be provided to the plug device 201 in another way. The plug device 201 may not include the ground member 58, and the ground connection terminal 51 and the second ground connection terminal 52 may be provided to the plug device 201 in another way.

  When the plug device 201 includes the ground connection terminal 51 and the second ground connection terminal 52, the plug device 200 is connected to the wiring duct 100 in a stable manner as will be described later.

  The ground member 58 can be manufactured, for example, by cutting and raising one metal plate. In this case, for example, the frame 581 is formed from the outer edge portion of the metal plate, and the ground connection terminal 51 and the second ground connection terminal 52 can be formed by cutting and raising a portion inside the outer edge portion of the metal plate. Therefore, the ground connection terminal 51 and the second ground connection terminal 52 can be easily manufactured and provided in the plug device 201. When manufacturing the ground member 58 in this manner, the dimensions of the metal plate are restricted by the dimensions of the connection member 87, and the projection length of the ground connection terminal 51 and the projection length of the second ground connection terminal 52 are Restricted by dimensions For this reason, for example, if the projection length of the ground connection terminal 51 and the projection length of the second ground connection terminal 52 are the same, the ground connection terminal 51 can not make the ground connection before the feeding connection in the connection process. There is. However, if the dimension in the protruding direction of the ground connection terminal 51 is longer than the dimension in the protruding direction of the second ground connection terminal 52, the dimension in the protruding direction of the ground connection terminal 51 It can be set in such a way that a ground connection occurs before. Furthermore, the plug device 200 can be stably connected to the wiring duct 100 by the ground connection terminal 51 and the second ground connection terminal 52.

  The plug device 201 includes a hook 91, which protrudes from the facing surface 53 of the main body 81. The hook 91 is formed of, for example, a leaf spring. The hook 91 has a shape corresponding to the recessed groove 16 so as to be hooked in the recessed groove 16 of the frame 10. In the first embodiment, the number of hooks 91 is four. Each hook 91 is at a position corresponding to the position of the recessed groove 16 of the frame 10, and the two hooks 91 face each other, and the other two hooks 91 also face each other. The number of hooks 91 may be any other appropriate number.

  In the connection process, first, the opposing surface 53 of the main body 81 of the plug device 200 is made to face the wiring duct 100, the connecting part 82 is made to face the connection port 12, and the feed terminals 70 are made to face the feed conductors 30, respectively. In this state, the connection portion 82 is inserted into the internal space 13 of the frame 10 from the connection port 12.

  Then, first, as shown in FIG. 5, the first contact portion 554 of the plate spring 55 in the ground connection terminal 51 is in contact with the ground terminal 11 to be electrically connected. That is, when the ground connection terminal 51 contacts the ground terminal 11, the first contact portion 554 first contacts the ground terminal 11. This creates a ground connection. As the connection portion 82 moves into the wiring duct 100, the contact position of the ground connection terminal 51 with the ground terminal 11 is changed from the first contact portion 554 of the leaf spring 55 to the bent portion 553 as shown in FIGS. And move to the second contact portion 555. When the connection of the plug device 201 to the wiring duct 100 is completed, the ground terminal 11 contacts the second contact portion 555. According to the movement of the contact position, the leaf spring 55 is elastically deformed by being pushed by the ground terminal 11 and moves to the connection portion 82 side. For this reason, the leaf spring 55 elastically presses the ground terminal 11, whereby the electrical connection between the ground connection terminal 51 and the ground terminal 11 is stabilized. Similarly, the second ground connection terminal 52 is electrically connected to the ground terminal 11. However, the second ground connection terminal 52 contacts the ground terminal 11 after the ground connection terminal 51 contacts the ground terminal 11 in the connection process. The plate spring 57 of the second ground connection terminal 52 also pushes the ground terminal 11 with an elastic force, whereby the electrical connection between the second ground connection terminal 52 and the ground terminal 11 is stabilized. In addition, since the two terminals of the ground connection terminal 51 and the second ground connection terminal 52 are in contact with the ground terminal 11 in this manner, the contact resistance is made smaller than when only the ground connection terminal 51 is in contact with the ground terminal 11. It can be reduced. Further, the ground connection terminal 51 and the second ground connection terminal 52 push the ground terminals 11 in an opposite direction to each other by elastic force, and accordingly, the ground terminals 11 have the ground connection terminal 51 and the second ground connection terminal. Apply opposing forces to 52 and each. This also stabilizes the electrical connection between the ground connection terminal 51 and the ground terminal 11, and the electrical connection between the second ground connection terminal 52 and the ground terminal 11.

  Further, in the connection process, as shown in FIG. 5, when the first contact portion 554 of the ground connection terminal 51 contacts the ground terminal 11, the feed terminal 70 is not in contact with the feed conductor 30. That is, at this time, the feed terminal 70 and the feed conductor 30 are not electrically connected. As the contact position of the ground connection terminal 51 with the ground terminal 11 moves from the first contact portion 554 toward the second contact portion 555, the lower end of the feed terminal 70 is first for feeding as shown in FIG. Contact the conductor 30. Thus, the feed terminal 70 and the feed conductor 30 are electrically connected. Furthermore, the feed conductor 30 enters between the two receiving plates 71 while elastically deforming the two receiving plates 71 of the feed terminal 70. When the connection of the plug device 201 to the wiring duct 100 is completed, the feed conductor 30 is sandwiched between the two receiving plates 71, as shown in FIG. The two receiving plates 71 push the feed conductor 30 by elastic force, whereby the electrical connection between the feed conductor 30 and the feed terminal 70 is stabilized. In this connection process, since the power supply conductor 30 is fitted into the recess 851 and the recess 852 of the connection portion 82, the connection portion 82 does not disturb the connection of the plug device 201 to the wiring duct 100.

  When the connection of the plug device 201 to the wiring duct 100 is completed, the hooks 91 of the plug device 200 are hooked in the recessed groove 16 of the wiring duct 100 accordingly. As a result, the plug device 201 is stably fixed to the wiring duct 100.

  As described above, in the connection process, before the feed terminal 70 is electrically connected to the feed conductor 30, the ground connection terminal 51 is electrically connected to the frame 10 which is the ground conductor by the ground terminal 11, The ground connection terminal 51 is disposed at the position where Specifically, the positions of the fixed end 551, the free end 552 and the bending portion 553 of the leaf spring 55 of the ground connection terminal 51, and the inclination of the portion between the fixed end 551 and the bending portion 553 are appropriately set. Be done. These elements define the position of each of the first contact portion 554 and the second contact portion 555 in the ground connection terminal 51. By setting the positions of the fixed end 551 and the free end 552, the positions of the first contact portion 554 and the second contact portion 555 are defined between the fixed end 551 and the free end 552. Further, by setting the position of the bending portion 553 and appropriately setting the inclination of the portion between the fixed end 551 and the free end 552, the position of the first contact portion 554 is the fixing end 551 and the bending portion. It is defined between 553 and 553. Further, by setting the position of the bending portion 553, the position of the second contact portion 555 is defined between the bending portion 553 and the fixed end 551. In the first embodiment, the inclination of the portion from the fixed end 551 to the bending portion 553 is larger than the inclination of the portion from the bending portion 553 to the free end 552 in the plate spring. Therefore, the position of the first contact portion 554 can be easily defined near the fixed end 551 by causing the plate spring 55 to largely rise from the base 54 in the vicinity of the fixed end 551. As a result, before the feed terminal 70 is electrically connected to the feed conductor 30, the ground connection terminal 51 can be easily electrically connected to the frame 10 which is the ground conductor. Furthermore, by appropriately adjusting the inclination of the portion from the bent portion 553 of the plate spring 55 to the free end 552, it is possible to prevent the amount of deformation of the entire plate spring 55 in the connection process from becoming excessive. Thus, the magnitude of the elastic force when the leaf spring 55 pushes the ground terminal 11 by the elastic force can be appropriately adjusted, and the breakage of the leaf spring 55 can be suppressed.

Second Embodiment
The plug device 202 according to the second embodiment will be described with reference to FIGS. 8 to 12. The plug apparatus 202 which concerns on Embodiment 2 is provided with the main-body part 81 and the connection part 82 which protrudes from the main-body part 81 (especially refer FIG. 8). Hereinafter, the same components as in the first embodiment are denoted by the same reference numerals, and the description thereof will be appropriately omitted. The connection portion 82 protrudes from one surface 53 (facing surface 53) of the main body portion 81. In the second embodiment, the opposing surface 53 faces upward. The facing surface 53 faces the wiring duct 100 in a state where the plug device 202 is connected to the wiring duct 100. A cable 400 is connected to the plug device 202. The cable 400 has a ground wire electrically connected to the ground connection terminal 51 of the plug device 202, and a wire electrically connected to the power supply terminal 70 of the plug device 202. The cable 400 is connected to the lower end of the main body 81. In the second embodiment, the plug device 202 further comprises a circuit breaker. The circuit breaker is electrically connected between the feed terminal 70 and the electric wire. The circuit breaker is housed in the main body 81.

  The configurations of the connecting portion 82 and the feeding terminal 70 are implemented except that the relationship between the upper side and the lower side is opposite to that of the first embodiment and the relationship between the left side and the right side is the opposite to the first embodiment. This is the same as the plug device 201 according to the first embodiment.

  As shown in FIG. 8, the ground connection terminal 51 is disposed outside the connection portion 82 along the first side surface 841. The ground connection terminal 51 is electrically connected to the grounding conductor in a state where the plug device 200 is connected to the wiring duct 100. Although the plug device 202 does not include the second ground connection terminal 52 in the first embodiment, the plug device 200 may include the second ground connection terminal 52 as in the first embodiment.

  The ground connection terminal 51 has conductivity, and is made of metal such as copper. As in the case of the first embodiment, the ground connection terminal 51 includes a base 54 protruding in the direction in which the connection portion 82 protrudes and in contact with the first side surface 841, and a plate spring 55 protruding from the base 54. The configuration of the base 54 and the plate spring 55 is the embodiment except that the relationship between the upper side and the lower side is opposite to that of the first embodiment, and the relation between the left side and the right side is the opposite to the first embodiment. Same as case 1 Further, the ground connection terminal 51 includes a fixing portion 59 that protrudes rearward from the lower end of the base 54.

  In the second embodiment, the main body 81 includes a metal ground plate 813, and the ground connection terminal 51 is fixed to the ground plate 813 (see FIG. 9). The ground plate 813 includes a top plate 812 constituting an opposing surface 53 of the main body 81, and a base plate 815 housed inside the main body 81. The base plate 815 has a terminal 814 to which a ground wire is connected. The top plate 812 has a frame shape having two long sides and two short sides, and has an opening at a position where the connection portion 82 is disposed. The base plate 815 has two long frame portions 816 constituting its long side and two short frame portions 817 constituting its short side. The fixing portion 59 of the ground connection terminal 51 is stacked on the inner surface of one short frame portion 817 and fixed by caulking connection or the like, whereby the ground connection terminal 51 is fixed to the ground plate 813.

  The structure of the ground connection terminal 51 is not limited to this. For example, the ground connection terminal 51 may be fixed to the connection portion 82 or a member including the connection portion 82. In this case, the ground connection terminal 51 may have the same structure as that of the first embodiment.

  The plug device 202 comprises a hook 92, which protrudes from the opposite surface 53 of the main body 81. The position and shape of the hooks 92 are defined such that when the plug device 202 is connected to the wiring duct 100 the hooks 92 hook onto the edge of the connection opening 12 in the frame 10. In the second embodiment, the number of hooks 92 is four, and the hooks 92 are at positions corresponding to the shape of the connection port 12. The hook 92 is swingable with respect to the main body 81, and by swinging, the hook 92 is hooked to the edge of the connection port 12 in a state where the plug device 202 is connected to the wiring duct 100; It is switched to the state where it does not get caught on the edge of 12. When no external force is applied to the hook 92, the hook 92 is in a state of being hooked to the edge of the connection port 12. The main body 81 has a push button 93 for swinging the hook. When the push button 93 is pressed, the hook 92 swings in conjunction with it, and the hook of the connection port 12 is not caught.

  In the connection process, first, the plug device 202 is opposed to the wiring duct 100, the opposite surface 53 of the main body 81 faces the wiring duct 100, the connection part 82 faces the connection port 12, and the feed terminal 70 is a feed conductor. Align so as to face 30. In the second embodiment, one side surface 84 (third side surface 843) of the connection portion 82 has a convex portion 61 projecting in the direction in which the side surface 84 faces as shown in FIG. The connection port 12 has a recess 62 having a shape corresponding to the protrusion 61, as shown in FIG. In the aligned state, the convex portion 61 and the concave portion 62 can be engaged, and thus the convex portion 61 and the concave portion 62 allow the connection portion 82 to be inserted into the connection port 12. In the unaligned state, the convex portion 61 is caught on the edge of the connection port 12 and the connection portion 82 does not enter the connection port 12. Therefore, the presence of the convex portion 61 and the concave portion 62 allows the plug device 202 to be properly aligned with the wiring duct 100. The plug device 202 according to the first embodiment may have the convex portion 61 as in the case of the second embodiment. The connection portion 82 and the connection port 12 have a shape that allows the connection portion 82 to be inserted into the connection port 12 by meshing with each other in a state of being aligned as well as the convex portion 61 and the concave portion 62 It is also good.

  In the aligned state, the connection portion 82 is inserted into the internal space 13 of the frame 10 from the connection port 12. Then, as in the case of the plug device 201 according to the first embodiment, as shown in FIG. 10, first, the first contact portion 554 of the plate spring 55 in the ground connection terminal 51 contacts the ground terminal 11 to electrically connect Be done. Subsequently, as shown in FIGS. 11 and 12, when the connecting portion 82 is further inserted into the internal space 13 of the frame 10, the ground terminal 11 contacts the second contact portion 555. The leaf spring 55 elastically presses the ground terminal 11, whereby the electrical connection between the ground connection terminal 51 and the ground terminal 11 is stabilized. Further, as in the case of the plug device 201 according to the first embodiment, when the first contact portion 554 of the ground connection terminal 51 comes in contact with the ground terminal 11 as shown in FIG. And are not electrically connected. As shown in FIGS. 11 and 12, as the contact position of the ground connection terminal 51 with the ground terminal 11 moves from the first contact portion 554 toward the second contact portion 555, the feed terminal 70 and the feed conductor 30 Electrically connected.

  Thus, also in the second embodiment, as in the first embodiment, the ground connection terminal 51 is electrically connected to the grounding conductor before the feeding terminal 70 is electrically connected to the feeding conductor 30, and so The ground connection terminal 51 is disposed at the position where

  Also, in the connection process, when the hook 92 hits the edge of the connection port 12, the hook 92 swings and enters the internal space 13 of the frame 10. When the connection of the plug device 202 to the wiring duct 100 is completed, the hook 92 is hooked on the edge of the connection port 12, ie, the hook 92 of the plug device 202 is hooked on the edge of the connection port 12 of the wiring duct 100. As a result, the plug device 202 is stably fixed to the wiring duct 100. When removing the plug device 202 from the wiring duct 100, if the push button 93 is pressed to swing the hook 92 so that the hook 92 is not caught on the edge of the connection port 12, the plug device 202 is made easy Can be removed.

  In the power distribution system 300 according to the present embodiment, as described above, when connecting the plug device 200 to the wiring duct 100, the ground connection can be generated before the feed connection occurs.

  The plug device 200 and the power distribution system 300 are not limited to the above description, and design changes such as addition, deletion, or replacement of various configurations are possible as needed.

  For example, in the above description, the plug device 200 includes the circuit breaker between the power supply terminal 70 and the electric wire, but may not include the circuit breaker. Moreover, the plug apparatus 200 may be equipped with apparatuses, such as a leakage breaker, a terminal block, and a current transformer (CT), for example.

  Further, the ground connection terminal 51 is disposed at a position where the ground connection terminal 51 is electrically connected to the grounding conductor before the feeding terminal 70 is electrically connected to the feeding conductor 30 in the connection process. Just do it. If so, the specific position and shape of the ground connection terminal 51 are not limited.

  For example, in the above description, in the first embodiment, the plug device 200 includes two ground terminals, the ground connection terminal 51 and the second ground connection terminal 52, and in the second embodiment, the plug device 200 is referred to as the ground connection terminal 51. It has one terminal for grounding. However, the number of terminals for ground connection is not limited to these. For example, in the first embodiment, the plug device 200 is a terminal for ground connection disposed along the third side surface 843 of the connection portion 82 and a ground connection terminal disposed along the fourth side surface 844 of the connection portion 82. At least one of the terminals of may be further provided.

  In the above description, the ground connection terminal 51 is disposed along the first side surface 841 of the connection portion 82 in the first aspect and the second embodiment, but the ground connection terminal 51 is disposed at another position. It is also good. For example, the ground connection terminal 51 may be disposed along the second side surface 842, the third side surface 843 or the fourth side surface 844 of the connection portion 82.

  In the above description, the second ground connection terminal 52 is disposed along the second side surface 842 of the connection portion 82 in the first embodiment, but the second ground connection terminal 52 is disposed at another position. It may be For example, when the ground connection terminal 51 is disposed along the first side surface 841, the second ground connection terminal 52 may be disposed along the third side surface 843 or the fourth side surface 844.

  In the above description, in the first embodiment, the dimension of the ground connection terminal 51 in the direction in which the connection portion 82 protrudes is larger than the dimension of the second ground connection terminal 52 in the direction in which the connection portion 82 protrudes. , It does not have to be. For example, the dimensions of the ground connection terminal 51 and the dimensions of the second ground connection terminal 52 may be the same. In this case, in the process of connecting the plug device 200 to the wiring duct 100, before the feed terminal 70 contacts the feed conductor 30, not only the ground connection terminal 51 but also the second ground connection terminal 52 is connected to the ground terminal 11. The contacts may be electrically connected. The dimension of the second ground connection terminal 52 may be larger than the dimension of the ground connection terminal 51.

  In addition, the ground connection terminal 51 may not have the plate spring 55 as long as it can be electrically connected to the ground conductor in contact with the ground conductor in the connection process. The ground connection terminal 51 may have a plate spring different in structure from the plate spring 55 in the present embodiment.

  Also, the grounding conductor provided in the wiring duct 100 may not be the frame 10 as described above. For example, the wiring duct 100 may be provided with a conductor having the same structure as the power supply conductor 30 as a ground conductor at a position where it can be in contact with the ground connection terminal 51 in the connection process. The plug device 200 may be provided with the ground connection terminal 51 of an appropriate structure according to the structure of the ground conductor.

  In addition, as long as ground connection can occur before feed connection in the connection process, the structure of feed conductor 30 and feed terminal 70 and the method of connecting both may be any structure and method.

  The configuration of the connection port 12 in the wiring duct 100 is also not limited to the above description. For example, the connection port 12 may be a slit having a length along the longitudinal direction of the frame 10, and the plug device 200 may be connected to an appropriate position in the longitudinal direction of the connection port 12.

(Summary)
The plug device (200) according to the first aspect is connected to a wiring duct (100) provided with a feeding conductor (30) and a grounding conductor (frame (10)). The plug device (200) comprises a main body (81). The plug device (200) protrudes from the main body (81), and the connection portion (13) disposed in the inner space (13) of the wiring duct (100) in a state where the plug device (200) is connected to the wiring duct (100). 82) is also provided. The plug device (200) is inside the connection portion (82), and is electrically connected to the power supply conductor (30) in a state where the plug device (200) is connected to the wiring duct (100). 70) is also provided. The connection portion (82) has a main disposition surface (845) which is a side surface (84) facing in a direction perpendicular to the direction in which the connection portion (82) protrudes. The plug arrangement (200) also comprises a ground connection terminal (51) arranged along the main arrangement surface (845). The ground connection terminal (51) is electrically connected to the ground conductor in a state where the plug device (200) is connected to the wiring duct (100). In the connection process, before the feed terminal (70) is electrically connected to the feed conductor (30), the ground connection terminal (51) is electrically connected to the ground conductor (51). ) Is arranged. The connection process is a process from when the plug device (200) is not connected to the wiring duct (100) to when it is connected.

  According to this configuration, before the plug device (200) is connected to the wiring duct (100), before the plug device (200) is electrically connected to the power supply conductor (30) of the wiring duct (100). It is easy to electrically connect to the grounding conductor.

  In the plug device (200) according to the second aspect, in the first aspect, the connection portion (82) is a sub disposition surface that is a side surface (84) facing in a direction opposite to the direction in which the main disposition surface (845) faces. It further has (846). The plug device (200) is disposed along the sub placement surface (846), and the second ground is electrically connected to the grounding conductor when the plug device (200) is connected to the wiring duct (100). It further comprises a connection terminal (52).

  According to this configuration, not only the ground connection terminal (51) but also the second ground connection terminal (52) can be used to make an electrical connection between the plug device (200) and the grounding conductor. Good stability can be achieved.

  In the plug device (200) according to the third aspect, in the second aspect, the dimension of the ground connection terminal (51) in the protruding direction of the connection portion (82) is the same as that of the second ground connection terminal (52). , Larger than the dimension in the projecting direction of the connection portion (82).

  According to this configuration, particularly, the plug device (200) is electrically connected to the grounding conductor before the plug device (200) is electrically connected to the feeding conductor (30) by using the grounding connection terminal (51). Can.

  In the plug device (200) according to the fourth aspect, in any one of the first to third aspects, the ground connection terminal (51) is a leaf spring having a fixed end (551) and a free end (552). (55) is provided. When no external force is applied to the leaf spring (55), the position of the free end (552) along the direction in which the connection portion (82) protrudes is the main portion (81) relative to the fixed end (551). On the side. Furthermore, when no external force is applied to the leaf spring (55), the position of the free end (552) along the direction in which the main disposition surface (845) faces is the main disposition surface with respect to the fixed end (551) And on the other side. The leaf spring (55) further has a bend (553) between the fixed end (551) and the free end (552). The inclination of the portion from the fixed end (551) to the bending portion (553) in the leaf spring (55) with respect to the projecting direction of the connection portion (82) is from the bending portion (553) in the leaf spring (55) to the free end ( The inclination of the portion up to 552) relative to the projecting direction of the connection (82) is larger.

  According to this configuration, when the plug device (200) is connected to the wiring duct (100), it is easy to define the initial contact position of the ground connection terminal (51) with the ground conductor. Furthermore, the stability of the electrical connection between the ground connection terminal (51) and the ground conductor can be improved.

  In the plug device according to the fifth aspect, in the fourth aspect, the leaf spring (55) is a first contact with the grounding conductor when the leaf spring (55) is connected to the grounding conductor in the connection process. It further has a contact portion (554). The leaf spring (55) is a second contact portion that contacts the grounding conductor in a state where the plug device (200) is connected to the wiring duct (100) between the bending portion (553) and the free end (552) (555) is also included. The dimension between the bend (553) and the first contact (554) is smaller than the dimension between the bend (553) and the second contact (555).

  According to this configuration, when the plug device (200) is connected to the wiring duct (100), it is easy to define the initial contact position of the ground connection terminal (51) with the ground conductor. Furthermore, the stability of the electrical connection between the ground connection terminal (51) and the ground conductor can be improved.

  A power distribution system (300) according to a sixth aspect includes the plug device (200) according to any one of the first to fifth aspects, and a wiring duct (100) to which the plug device (200) is connected. .

  According to this configuration, before the plug device (200) is connected to the wiring duct (100), before the plug device (200) is electrically connected to the power supply conductor (30) of the wiring duct (100). It is easy to electrically connect to the grounding conductor.

100 wiring duct 201 plug device 202 plug device 300 power distribution system 10 frame (conductor for grounding)
11 ground terminal 12 connection port 13 internal space 30 power supply conductor 51 ground connection terminal 52 second ground connection terminal 55 flat spring 551 fixed end 552 free end 553 bent section 554 first contact section 555 second contact section 70 feed terminal 81 Body part 82 Connection part 84 Side surface 845 Main arrangement surface 846 Sub arrangement surface

Claims (6)

A plug device connected to a wiring duct comprising a power supply conductor and a grounding conductor;
Body part,
A connecting portion which protrudes from the main body portion and is disposed in an inner space of the wiring duct in a state where the plug device is connected to the wiring duct;
And a feed terminal which is inside the connection portion and is electrically connected to the feed conductor in a state where the plug device is connected to the wiring duct,
The connection portion has a main disposition surface which is a side surface facing in a direction orthogonal to the direction in which the connection portion protrudes.
The plug device further includes a ground connection terminal disposed along the main disposition surface and electrically connected to the ground conductor in a state where the plug device is connected to a wiring duct.
In the connection process from the state where the plug device is not connected to the wiring duct to the connected state, the ground connection terminal is connected to the ground before the feed terminal is electrically connected to the feed conductor. The ground connection terminal is disposed at a position where it is electrically connected to the
Plug device. The connection portion further includes a sub disposition surface which is a side surface facing in a direction opposite to the direction in which the main disposition surface faces.
The plug device further includes a second ground connection terminal disposed along the sub layout surface and electrically connected to the ground conductor in a state where the plug device is connected to a wiring duct.
The plug device according to claim 1. The dimension of the ground connection terminal in the protruding direction of the connection portion is larger than the dimension of the second ground connection terminal in the protruding direction of the connection portion.
The plug device according to claim 2. The ground connection terminal includes a plate spring having a fixed end and a free end, and in a state where no external force is applied to the plate spring, the position of the free end along the direction in which the connection portion protrudes is The position of the free end on the main body side with respect to the fixed end and along the direction in which the main arrangement surface faces the free end is opposite to the main arrangement surface with respect to the fixed end,
The leaf spring further has a bending portion between the fixed end and the free end, and the inclination of the portion from the fixing end to the bending portion in the leaf spring with respect to the direction in which the connection portion protrudes is Greater than the inclination of the portion from the bent portion to the free end in the leaf spring with respect to the direction in which the connection portion protrudes,
Plug device according to any one of the preceding claims. The plate spring further includes a first contact portion between the fixed end and the bent portion, the first contact portion initially contacting the grounding conductor when the plate spring contacts the grounding conductor in the connection process. And
The leaf spring further includes a second contact portion between the bent portion and the free end, the second contact portion contacting the grounding conductor in a state where the plug device is connected to the wiring duct.
The dimension between the bend and the first contact is smaller than the dimension between the bend and the second contact,
The plug device according to claim 4. A plug device according to any one of claims 1 to 5;
And a wiring duct to which the plug device is connected,
Power distribution system.

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