JP2008157887A - Device for preventing improper connection and for sealing, and watthour meter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent improper connection of a wire to a wire connection hole at a terminal section of a watthour meter, and to prevent use of electric power without permission after at least a meter section of the watthour meter is detached. <P>SOLUTION: A device 1 for preventing improper connection and for sealing comprises a frame 2, wire connection holes 3-9 which are arranged on the frame in the same arrangement of the wire connection holes at the terminal section of the watthour meter, and a fastening means for fastening wires 10-14 connected via the wire connection holes 3-9. The device 1 for preventing improper connection and for sealing further comprises a door mechanism 21 for covering the fastening means and a sealing means for sealing the fastening means by the door mechanism 21. Each of the wires 10-14 connected to the respective wire connection holes 3-9 of the device 1 may be individually detached therefrom to be connected to each of wire connection holes 55-60 of a terminal section 39 in the same arrangement of the wire connection holes 3-8 of the device 1 so that the sealing is carried out by preventing improper connection, thereby preventing the use of the electric power without permission. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention prevents an unauthorized use of electricity in a state where the entire watt-hour meter or its meter section is removed, and an apparatus for preventing erroneous connection of wiring during the installation work of the watt-hour meter or its meter section Relates to the structure of the watt hour meter.

  This type of watt hour meter or the like has, for example, a part called a main body part or a meter part and a part called a connection terminal block or a terminal part as shown in Patent Document 1. In general, the wiring on the power supply side and the load side are appropriately connected to the connection terminal block or the wiring connection hole of the terminal portion.

  And when the power contract is abolished and the power supply is stopped, conventionally, after removing the watt hour meter 100 as shown in FIG. 8, without permission using a sealing tool as shown in Patent Document 2 or the like. Sealing is performed on the instrument box 101 and the like so as not to use electricity. When the wirings 102 to 107 are removed from the terminals of the watt hour meter 100, the removed wirings 102 to 107 are classified by color in order to prevent erroneous connection of the wirings 102 to 107 during the subsequent work of attaching the watt hour meter 100. The cap 108, the tape 109, etc. were used to display each color, and the color was written on the instrument terminal cover. In addition, since the power supply side wirings 102 to 104 remain energized after being removed, the insulation processing to the terminal is also performed with the tape 109 or the like.

On the other hand, as shown in FIG. 11 of “0047” and “0048” of Patent Document 3, a terminal-side connecting component is detachably attached to the terminal portion of the watt-hour meter, and power is supplied to a house that is absent for a long time. For the invention of the watt-hour adapter device that covers the terminal-side connecting component by joining the terminal-side connecting component and the power presentation component instead of the instrument-side connecting component when the supply is stopped, It has already been made public by human development.
JP 2006-114232 A JP 2006-65007 A JP 2006-226915 A

  On the other hand, for example, in some accumulators in which a plurality of instruments are stored in one storage space, even if only one instrument is to be sealed, the sealing process is performed from the structure. For this reason, there is a problem that proper instrument management cannot be performed.

  In addition, it is complicated to attach caps or tapes to each wiring for color display or insulation processing, and to enter the colors on the instrument terminal cover. Moreover, these color indications cannot be said to be a measure for preventing reliable connection of wiring. Furthermore, when reconnecting the wiring, even if each wiring is displayed by color, depending on the length of the wiring, it may not be understood which terminal of the meter should be connected.

  When the watt hour meter is attached, it is necessary to remove the tape or the like attached to the power supply side wiring for insulation treatment when inserting and connecting the power supply side wiring to the wiring connection hole of the terminal. Such insulation processing work on the power supply side wiring and removal work of the insulation processing have a problem that the danger is great for the workers because the power supply side wiring remains energized.

  On the other hand, the terminal-side connecting component of the watt-hour adapter device described in Patent Document 3 is normally used and not used as a sealing tool, and the watt-hour meter has a main body portion and a terminal portion. It does not have a structure to separate. Furthermore, in the watt-hour meter described in Patent Document 3, even in a normal state, the terminal-side connecting component and the instrument-side connecting component are connected to the terminal portion, so that the watt-hour meter is assembled in the vertical direction after assembling these components. Since the size along the line becomes relatively large, it is necessary to expand the instrument box for storing these watt-hour meters, and thus to expand the installation space for the watt-hour meter.

  Therefore, the present invention prevents erroneous connection to the terminal of the wiring, reduces the risk during the removal and reconnection of the power supply side wiring, and further, after removing at least the meter part of the watt-hour meter It is an object of the present invention to provide a misconnection prevention / sealing device and a watt hour meter that can prevent unauthorized use of electricity.

  The erroneous connection preventing / sealing device according to the present invention is connected to the housing, the wiring connection hole provided in the same arrangement as the wiring connection hole of the terminal portion of the watt hour meter, and the wiring connection hole. The present invention is characterized in that an erroneous connection preventing / sealing instrument having a fastening means for fastening the wired wiring is provided (claim 1). The erroneous connection preventing / sealing instrument has an opening / closing portion that covers the fastening means so as to be openable and closable, and has a sealing means that seals the state where the fastening means is covered by the opening / closing portion. (Claim 2). Here, the fastening means is configured by, for example, providing a screw hole extending from the radial direction of the wiring connection hole to the wiring connection hole, and inserting and fixing a fixing tool such as a bolt into the screw hole. The opening / closing portion is a cantilever door type door mechanism including a rotating shaft and a door main body extending in a radial direction from one of the rotating shafts, and the door main body slides along a surface having fastening means between a pinion and a rack. A sliding door type door mechanism may be used, and its structure is not particularly limited. Further, a cover part separate from the housing may be used instead of the opening / closing part. The sealing means includes, for example, a through hole provided in the opening / closing portion and the housing, and is mounted so that the sealing screw does not come out through the through hole. The sealing wire is inserted into the insertion hole formed by cutting and raising the portion and the lead hole for the sealing lead.

  As a result, when re-attaching the watt-hour meter, when reconnecting the wiring to the terminal of the watt-hour meter, connect to each wiring connection hole of the wrong connection prevention / sealing tool constituting the device for prevention of wrong connection / sealing. If the procedure is such that individual wires are removed and connected to the same wiring connection holes in the terminal portion as the wiring connection holes of the erroneous connection prevention / sealing device, the wiring is accurate and reliable. Connected to the original state. In addition, when the watt hour meter is removed, wiring is connected to each wiring connection hole of the instrument for preventing incorrect connection / sealing, and the state where the end of the wiring is exposed to the outside can be avoided, while preventing misconnection / sealing. The fastening means of the appliance is covered with an opening / closing part, and sealed with the sealing means while being covered with the opening / closing part. In addition, since the erroneous connection preventing / sealing device is arranged in the space where the terminal portion is present after the watt hour meter is removed, the installation space for the watt hour meter due to the addition of additional parts does not occur.

  Further, the erroneous connection preventing / sealing device according to the present invention is formed by assembling a terminal part of the watt hour meter that can be separated and combined with the meter part of the watt hour meter and a cover that covers the terminal part. A device for preventing erroneous connection and sealing, wherein the terminal portion includes a housing, a wiring connection hole provided in the housing to which wiring can be connected, and a side opposite to the wiring connection hole with respect to the housing A connection hole portion that can be connected to a terminal of a meter unit of the watt hour meter, and a fastening means for fastening a wire connected from the wire connection hole, and the cover includes the connection hole portion. A first wall portion covering the fastening means and a second wall portion covering the fastening means, and the terminal portion and the covering body are in a state where the covering body covers the fastening means of the terminal portion. Sealing means for sealing is provided (claim 3). This fastening means is also configured, for example, by providing a screw hole extending from the radial direction of the wiring connection hole to the wiring connection hole, and inserting a fixing tool such as a bolt into the screw hole and screwing it. The sealing means, for example, is provided with a through hole in the cover and the casing of the terminal portion, and after mounting the sealing screw so that the sealing screw cannot be removed, the horizontal hole formed in the radial direction with respect to the sealing screw, A sealing wire is inserted through a through hole formed by raising a part of the body and a through hole for sealed lead.

  As a result, even if the meter part of the watt hour meter is removed, the terminal part remains, and the work itself of removing the wiring from the wiring connection hole of the terminal part becomes unnecessary. When reattaching, incorrect wiring connection is eliminated. In addition, when the meter part of the watt hour meter is removed, since the wiring remains connected to each wiring connection hole of the terminal part of the watt hour meter that constitutes the erroneous connection prevention / sealing device, the end of the wiring is external. The fastening means of the terminal part of the watt hour meter is covered with a lid, and is sealed with the sealing means while being covered with this lid. Furthermore, an erroneous connection prevention / sealing instrument as shown in claim 1 or claim 2 can be dispensed with. In addition, since the terminal portion of the watt-hour meter is used as an erroneous connection prevention / sealing device, the installation space of the watt-hour meter is not increased by adding more parts.

  The watt-hour meter according to the present invention corresponds to the erroneous connection preventing / sealing device according to claim 3, and includes an instrument portion that can be joined to the terminal portion according to claim 3 via the engaging means. The meter portion has a terminal connected to the connection hole portion of the terminal portion, and the protruding width of the grounding terminal is the protruding width of the non-grounding terminal. (Claim 4). Here, for example, the engaging means is provided with an engaging hole on the same side as the opening side of the connection hole portion of the terminal portion, and a protrusion that can be engaged with the engaging hole on the same side as the terminal of the instrument portion. It is composed of that.

  In this way, by making the ground side terminal protrude wider than the non-ground side terminal, the terminal of the meter part is connected to the connection hole part of the terminal part of the watt hour meter constituting the device for preventing misconnection and sealing. On the other hand, the abnormal voltage is prevented from entering when inserting / removing.

  On the other hand, the erroneous connection preventing / sealing device according to the present invention is constructed by assembling a terminal part of the watt hour meter that can be separated and combined with the meter part of the watt hour meter and a cover that covers the terminal part. A device for preventing erroneous connection and sealing, wherein the terminal portion includes a housing, a wiring connection hole provided in the housing to which wiring can be connected, and a side opposite to the wiring connection hole with respect to the housing A metal part of a terminal that can be connected to the connection hole part of the meter part of the watt-hour meter, and a fastening means for fastening the wiring connected through the wiring connection hole, A wall portion for enclosing the metal portion of the terminal; and a wall portion for enclosing the metal portion of the terminal and covering the fastening means, and the terminal portion and the cover include the cover and the terminal It is provided with the sealing means which seals the state which covered the said fastening means of the part (Claim) ). This fastening means is also configured, for example, by providing a screw hole extending from the radial direction of the wiring connection hole to the wiring connection hole, and inserting a fixing tool such as a bolt into the screw hole and screwing it. The sealing means also includes, for example, a through-hole formed in the cover and the terminal portion, and a mounting hole is provided so that the sealing screw cannot be removed from the through-hole. The sealing wire is inserted into the through hole formed by raising a part of the lead wire and the through hole of the sealed lead.

  As a result, even if the meter part of the watt hour meter is removed, the terminal part remains, and the work itself of removing the wiring from the wiring connection hole of the terminal part becomes unnecessary. When reattaching, incorrect wiring connection is eliminated. In addition, when the meter part of the watt hour meter is removed, wiring is connected to each wiring connection hole of the terminal part of the watt hour meter constituting the device for preventing erroneous connection and sealing, and the terminal of the wiring is exposed to the outside. In addition to avoiding this state, the fastening means of the terminal part of the watt hour meter is covered with a lid, and sealed with the sealing means while being covered with this lid. Furthermore, the erroneous connection prevention / sealing instrument shown in claim 1 or claim 2 can be dispensed with. Furthermore, the terminal part can be used as it is. In addition, since the terminal portion of the watt-hour meter is used as an erroneous connection prevention / sealing device, the installation space of the watt-hour meter is not increased by adding more parts.

  As described above, according to the invention described in claim 1, when reconnecting the wiring to the terminal part of the watt hour meter when reattaching the watt hour meter, the erroneous connection prevention / sealing device is configured. Remove the wires connected to each wiring connection hole of the connection prevention / sealing tool individually and connect them to the terminal connection holes that have the same arrangement as the wiring connection holes of the relevant connection prevention / sealing equipment. If the procedure of doing is taken, wiring can be correctly and reliably connected to the original state. Moreover, according to the invention of Claim 3 or Claim 5, even if the meter part of the watt-hour meter is removed, the terminal part remains, and the wiring is removed from the wiring connection hole of the terminal part and reconnected. The work itself is unnecessary. For this reason, it is possible to prevent erroneous connection of wiring due to incorrect selection of the wiring to the wiring connection hole of the terminal portion when the watt-hour meter or its instrument portion is reattached.

  According to the invention described in claim 1, 3 or 5, when using a misconnection prevention / sealing instrument, the power supply side wiring is connected from the wiring connection hole and fastened by the fastening means. When using the terminal part, there is no work to insert and remove the power supply side wiring itself, so there is no need to insulate the terminal even if the power supply side wiring is energized, and it is also necessary to remove the insulation process accordingly. Therefore, it is possible to reduce the danger of the worker's work.

  According to the second aspect of the present invention, when the watt hour meter is removed, the wiring is connected to each connection hole of the misconnection prevention / sealing device to avoid the state where the terminal of the wiring is exposed to the outside. At the same time, the fastening means of the erroneous connection prevention / sealing instrument is covered by the opening / closing part, and the sealing means is sealed in the covered state. Further, according to the invention described in claim 3 or claim 5, when the meter part of the watt hour meter is removed, each connection of the terminal part of the watt hour meter constituting the erroneous connection prevention / sealing device The wiring is still connected to the hole, and the state where the end of the wiring is exposed to the outside is avoided, and the fastening means of the terminal part of the watt hour meter is covered with a lid, and the sealing means is covered with the covered state. Sealed. For this reason, it is possible to prevent unauthorized use even though the power contract is abolished and the electric supply is stopped, and appropriate instrument management can be performed. And even if it is a totalizer with which several measuring instruments are accommodated in one storage space, it can seal separately with respect to each measuring instrument.

  In particular, according to the inventions described in claims 3, 4 and 5, there is no need for an erroneous connection prevention / sealing device. Further, according to the invention described in claim 5, the terminal part of the watt hour meter Since the structure can be used as it is, it is possible to reduce the manufacturing cost of the erroneous connection prevention / sealing device.

  In particular, according to the invention described in claim 4, the amount of electric power that constitutes the device for preventing misconnection / sealing of the terminals of the instrument section by increasing the protruding width of the grounded terminal as compared to the non-grounded terminal. It is possible to prevent an abnormal voltage from entering when inserting and removing from the connection hole of the terminal portion of the meter.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIGS. 1 to 3 show an example of an embodiment using an erroneous connection prevention / sealing instrument 1 in the erroneous connection prevention / sealing apparatus according to the present invention. This incorrect connection preventing / sealing instrument 1 is used when the entire watt-hour meter 29 is removed as shown in FIG. 3 (a). The terminal 39 of the watt-hour meter shown in FIG. And a housing 2 having substantially the same shape as the above.

  The casing 2 is made of a non-conductive material to provide insulation performance, and has six surfaces including a top surface 2A, a front surface 2B, a back surface 2C, side surfaces 2D and 2D, and a bottom surface 2E. In addition, in this embodiment, in order to correspond to the watt-hour meter 29 such as a single-phase three-wire type or a three-phase three-wire type, as shown in FIG. 1 and FIG. 3 to 8 are formed on the bottom surface 2E. Among these, the power supply side wiring 9 shown in FIG. 3 is connected to the wiring connection hole 3, the grounding power supply side wiring 10 shown in FIG. 3 is connected to the wiring connection hole 4, and the wiring connection hole 5 is connected to the wiring connection hole 5. Is connected to the power supply side wiring 11 shown in FIG. Further, the load side wiring 12 shown in FIG. 3 is connected to the wiring connection hole 6, the load side wiring 13 for grounding shown in FIG. 3 is connected to the wiring connection hole 7, and the wiring connection hole 8 is connected to the wiring connection hole 8. The load side wiring 14 shown in FIG. 3 is connected.

  As shown in FIGS. 1 and 2, the casing 2 is used as a fastening means for the wirings 9 to 14 in the radial direction of the wiring connection holes 3 to 8 from the front surface 2B with respect to the wiring connection holes 3 to 8. Screw holes 15 and 16 extending to the portion are provided, and male screws 17 and 18 are screwed into the screw holes 15 and 16 as fasteners.

  Further, on the front surface 2B of the housing 2, as shown in FIG. 1 and FIG. 2A, in order to specify the connection positions of the wirings 9 to 14 to the wiring connection holes 3 to 8, the relevant FIG. In addition, 1S, 2S, 3S, 3L, 2L, and 1L are displayed from the left side in FIG. This display arrangement is the same as the arrangement of the wirings 9 to 14 connected to the wiring connection holes 55 to 60 of the terminal portion 39. The housing 2 is provided with mounting holes 19 and 20 penetrating from the front surface 2B to the back surface 2C. The positions of the mounting holes 19 and 20 are the same as the positions of the mounting holes for fixing the terminal portion 39 of the watt-hour meter 29 to a mounting plate or an instrument box 30 (not shown). Mounting holes (not shown) can be used.

  Furthermore, as shown in FIGS. 1 to 3, the housing 2 has a door as an opening / closing portion that opens and closes the fastening means including the screw holes 15 and 16 and the male screws 17 and 18. A mechanism 21 is attached. The door mechanism 21 includes a bearing portion 22 fixed to the housing 2, a rotating shaft 23 rotatably spanned between the bearing portions 22, 22, and a radial direction from the side surface of the rotating shaft 23. This is called a cantilever door type including a door main body 24 extending in a vertical direction. However, the structure of the door mechanism 21 is not limited to this, and although not shown, for example, a door body that slides up and down along the front surface 2B of the housing 2 and a pinion that applies a force to the door body for a sliding operation And a sliding door type comprising a rack.

  Then, by fixing the state in which the front surface 2B of the housing 2 is covered with the door main body 24 of the door mechanism 21, the sealing means for the fastening means composed of the screw holes 15, 16 and the male screws 17, 18 is performed. In addition, the housing 2 is provided with a screw hole 25 penetrating from the front surface 2B to the back surface 2C in the central portion in the longitudinal direction of the housing 2, and the door main body 24 is formed on the front surface 2B with respect to the door main body 24. A screw hole 26 is provided at a position coinciding with the screw hole 25 when abutting. Further, a part of the door main body 24 is curved to the opposite side to the front surface 2B side to form a cut-and-raised portion 27, so that a pair of both sides of the cut-and-raised portion 27 as shown in FIG. The insertion holes 28, 28 are opened.

  The misconnection prevention / sealing instrument 1 is used as shown in FIGS. 2C and 3 by having the above-described configuration. The procedure will be described below.

  First, in order to stop the power supply after the power contract is abolished, the wires 9 to 14 are removed from the terminal portion 39 of the watt-hour meter 29, and the entire watt-hour meter 29 is removed from the meter box 30. In the space where the terminal portion 39 of the watt-hour meter 29 is located, the erroneous connection prevention / sealing instrument 1 is arranged, and the fixing holes such as bolts are attached from the mounting holes 19 and 20 to the mounting holes of the mounting plate or the instrument box 30. Insert and fix.

  Next, the door main body 24 of the door mechanism 21 is rotated to be opened from the front surface 2B of the housing 2, and a table such as 1S described on the front surface 2B of the misconnection prevention / sealing device 1 is referred to. However, the wires 9 to 14 are connected to the wire connection holes 3 to 8 of the improper connection prevention / sealing instrument 1, and the male screws 17 and 18 are turned to turn the screw holes 15 and 16 at the heads of the male screws 17 and 18. The wirings 9 to 14 are pressed against the inner peripheral surfaces of the wiring connection holes 3 to 8 on the side opposite to the opening side of the wirings 9 to hold the wirings 9 to 14.

  Further, the door main body 24 is rotated to abut the front surface 2B of the housing 2 to be closed, and the screw hole 25 of the housing 2 and the screw hole 26 of the door main body 24 communicated with each other in FIG. The sealing screw 31 shown in FIG. The sealing screw 31 is the same as that shown in FIGS. 4 and 5, and in this embodiment, the insertion portion 32 having an outer diameter substantially the same as the inner diameter of the screw holes 25 and 26, and the proximal end of the insertion portion 32 A head 33 that is larger than the inner diameter of the screw holes 25 and 26, and a holding portion 34 that is provided on the distal end side of the insertion portion 32 and prevents the sealing screw 31 from coming off from the screw holes 25 and 26. The head 33 has a through hole 35 extending in the radial direction. Further, in the through hole 35 of the head 33 of the sealing screw 31, the insertion holes 28 and 28 of the door body 24, and the through hole of the sealing lead 36 shown in FIGS. 2 (c) and 3 (b), FIG. One sealing wire 37 shown in FIG. 3C and FIG. 3B is inserted so as to be passed. Thereby, the sealing process by the erroneous connection preventing / sealing instrument 1 is completed.

  On the other hand, an example in the case of performing a restoration operation for reattaching the watt hour meter 29 to the meter box 30 will be described. The state in which the door body 24 of the door mechanism 21 is rotated and opened from the front surface 2B of the housing 2. Then, a fixing tool such as a bolt is removed from the screw holes 19 and 20 of the housing 2 to remove the erroneous connection preventing / sealing device 1. In this case, the wirings 9 to 14 are kept connected to the wiring connection holes 3 to 8 of the housing 2. Next, the watt hour meter 29 is attached to the meter box 30. Then, the wires 9 to 14 are individually extracted from the wire connection holes 3 to 8 of the housing 2 and connected to the wire connection holes of the terminal portion 39 of the watt-hour meter 29. As a result, which of the wiring connection holes of the terminal portion 39 is connected to the wirings 9 to 14 is determined by the position connected by the wiring connection holes 3 to 8 of the housing 2 and 1L described in the housing 2. Therefore, it is possible to prevent erroneous connection of the wirings 9 to 14.

  4 to 6, the meter part 38 and the terminal part 39 of the watt-hour meter 29 are improved in separation and coupling so that the terminal part 39 can be combined with the cover 71. An example of an embodiment as a component of an erroneous connection prevention / sealing device according to the invention is shown.

  Male pin type terminals 40 to 45 to be connected to the terminal portion 39 are provided at a portion of the instrument portion 38 on the terminal portion 39 side. These terminals 40 to 45 swell at the center side from both ends in the protruding direction in order to prevent poor contact when inserted into female pin type connection holes 61 to 66 described later of the terminal portion 39. It has a shape. Note that the side surfaces of these terminals 40 to 45 are pressed against the inner peripheral surfaces of the connection holes 61 to 66 when the terminals 40 to 45 are inserted into the connection holes 61 to 66, so that the terminals 40 to 45 are pushed toward the center in the radial direction. You may form the slit 46 so that it may squeeze. As shown in FIG. 5, the grounding terminals 41 and 44 have a projecting width larger as the dimension L1 than the other terminals 40, 42, 43 and 45. This prevents an abnormal voltage from entering when the instrument part 38 is inserted into or removed from the terminal part 39.

  Protrusions 47 and 47 are provided outside the terminals 40 and 45 in the portion on the terminal portion 39 side of the instrument portion 38. These protrusions 47 have a round head 48 having an outer diameter larger than the inner diameter of the engagement hole 68 of the terminal portion 39 on the tip side, and are separate from the instrument portion 38. It is comprised by attaching to the attachment hole (not shown) of the instrument part 38. FIG. However, the protrusion 47 may be formed integrally with the instrument part 38.

  The terminal portion 39 has input terminals 49 to 51 and output terminals 52 to 54. The input terminals 49 to 51 and the output terminals 52 to 54 are connected to the wiring connection holes 55 on the bottom side as shown in FIG. The wirings 9 to 14 are connected to the wiring connection holes 55 to 60. The wires 9 to 14 connected to the wire connection holes 55 to 60 are held by inserting the male screws 17 and 18 into the screw holes 15 and 16 from the front side of the terminal portion 39 and screwing them together.

  As shown in FIGS. 4 and 5, the input terminals 49 to 51 and the output terminals 52 to 54 have female pin type connection holes 61 to 66 to which the terminals 49 to 51 of the instrument section 38 are connected. The connection hole portions 61 to 66 and the wiring connection holes 55 to 60 are connected in the axial direction. A metal portion 67 is disposed as a conductor portion on the inner peripheral surfaces of the connection hole portions 61 to 66 and the wiring connection holes 55 to 60 as shown by the oblique broken lines in FIG. As shown in the figure, the metal portion 67 is arranged not from the opening end on the connection hole portions 61 to 66 side but from a position inside the predetermined range. This prevents the arc from flying when the terminals 49 to 51 of the instrument section 38 are connected to the connection holes 61 to 66.

  Further, the terminal portion 39 has a projection 47 of the instrument portion 38 inserted on the upper surface thereof, and an engagement hole 68 to be engaged with the head portion 48 is opened. Furthermore, as shown in FIG. 4, the terminal portion 39 is provided with a mounting hole 69 from the front surface to the back surface. By inserting a fixing tool 70 such as a bolt into the mounting hole 69, the terminal portion 39 is It is fixed to a mounting plate (not shown) or an instrument box 30.

  The cover 71 includes a wall portion 72 that covers the connection holes 61 to 68 that are open on the upper surface of the terminal portion 39, and a wall portion 73 that covers the male screws 17 and 18 attached to the front surface of the terminal portion 39. It is configured. The wall 72 has the same number of projections 74 (six in this embodiment) as the number of the connection holes 61 to 68, and the wall 72 is partially recessed inwardly. The protrusion 74 can position the cover 71 when the cover 71 is attached to the terminal part 39 and prevents the cover 71 and the terminal part 39 from being displaced. Further, the outer surface of the wall portion 73 has a flat plate shape and can be attached with a seal 75 such as a contract number seal.

  Then, by fixing the state in which the terminal portion 39 is covered with the cover 71, the terminal portion 39 has a screw hole in order to seal the fastening means including the screw holes 15 and 16 and the male screws 17 and 18. The cover body 71 has screw holes 26 communicating with the screw holes 25 and insertion holes 28 and 28 formed on both sides thereof by providing cut-and-raised portions 27. In this embodiment, the sealing screw 31 has an insertion portion 32 having an outer diameter substantially the same as the inner diameter of the screw holes 25 and 26 and an inner diameter of the screw holes 25 and 26 provided on the proximal end side of the insertion portion 32. The head 33 includes a head 33 and a holding portion 34 that is provided on the distal end side of the insertion portion 32 and prevents the sealing screw 31 from falling off the screw holes 25 and 26. A through hole 35 extending in the radial direction passes therethrough.

  The instrument part 38 and the cover 71 constituting the erroneous connection preventing / sealing device are used as shown in FIG. The procedure will be described below.

  First, in order to stop the power supply due to the abolition of the power contract or the like, the meter portion 38 of the watt-hour meter 29 is removed from the terminal portion 39 that remains attached to the mounting plate or the meter box 30. Next, the cover 71 is put on the terminal portion 39 so that the protruding portion 74 matches the connection hole portions 61 to 68 of the terminal portion 39. Then, after inserting the sealing screw 31 into the screw hole 25 of the terminal portion 39 and the screw hole 26 of the cover 71 that are in communication, the through-hole 35 of the head 33 of the sealing screw 31, the insertion hole 28 of the cover 71, A sealing wire 37 similarly shown in FIG. 6 is inserted through the through hole of the sealing lead 36 shown in FIG. 28 and FIG. Thereby, the sealing process using the improved instrument section 38 and cover 71 is completed.

  On the other hand, when performing the restoration work to reattach the meter part 38 of the watt-hour meter 29, the cover 71 is removed by removing the seal from the terminal part 39 that is still attached to the attachment plate or the instrument box 30, It is only necessary to reconnect the terminals 40 to 45 of the instrument section 38 to the connection holes 61 to 68 of the terminal section 39.

  For this reason, it is not necessary to remove the wirings 9 to 14 from the wiring connection holes 55 to 60 of the terminal portion 39, and it is not necessary to reconnect the wirings 9 to 14 to the wiring connection holes 55 to 60 of the terminal portion 39. 9 to 14 erroneous connections can be eliminated.

  In FIG. 7, even with the watt-hour meter 29 currently used, it is possible to separate the terminal portion 39 and the instrument portion 38 by removing a predetermined screw. An example of an embodiment in which the combination with the body 71 is made possible as a component of the erroneous connection preventing / sealing apparatus according to the present invention is shown. However, the same components as those of the previous embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  When the current terminal portion 39 is removed from the instrument portion 38, the metal portions 77 to 83 protrude from the upper surface thereof as shown in FIG. For this reason, the cover 71 has a structure that can cover these metal parts 77 to 83. That is, the cover 71 includes a wall portion 72 that is an upper surface, a wall portion 73 that extends downward from the front side end of the wall portion 72 in the drawing, and a wall that extends downward from the rear side end of the wall portion 72 in the drawing. The extension dimension L4 of the wall part 73 from the wall part 72 is substantially equal to the sum of the height L3 of the terminal part 39 and the protruding width L2 of the metal parts 77 to 83. The extension dimension L2 of the wall portion 76 from the wall portion 72 is substantially the same as the protruding width L2 of the metal portions 77 to 83. As a result, when the cover 71 is put on the instrument part 38, the wall part 76, the wall part 72, and the upper part of the wall part 73 surround the metal parts 77 to 83, and the wall part 73 covers the front surface of the terminal part 39. It is possible to cover the entire range.

  The instrument part 38 and the cover 71 constituting the erroneous connection preventing / sealing device are used as shown in FIG. The procedure will be described below.

  First, in order to stop the power supply due to the abolition of the power contract or the like, the meter portion 38 of the watt-hour meter 29 is removed from the terminal portion 39 that remains attached to the mounting plate or the meter box 30. Next, the cover 71 is put on the terminal portion 39 so as to cover the metal portions 77 to 83 as well. Then, after inserting the sealing screw 31 into the screw hole 25 of the terminal portion 39 and the screw hole 26 of the cover 71 that are in communication, the through-hole 35 of the head 33 of the sealing screw 31, the insertion hole 28 of the cover 71, One sealing wire 37 is inserted through the through hole 28 and the sealing lead 36 so as to be passed. As a result, the sealing process using the current instrument unit 38 and the cover 71 is completed.

  On the other hand, when performing the restoration work to reattach the meter part 38 of the watt-hour meter 29, the cover 71 is removed by removing the seal from the terminal part 39 that is still attached to the attachment plate or the instrument box 30, It is only necessary to screw the terminal portion 39 and the instrument portion 38 again with screws.

  However, even in this embodiment, it is not necessary to remove the wires 9 to 14 from the wiring connection holes 55 to 60 of the terminal portion 39, and thus it is also necessary to reconnect the wires 9 to 14 to the wiring connection holes 55 to 60 of the terminal portion 39. Therefore, the erroneous connection of the wirings 9 to 14 can be eliminated.

FIG. 1 is a perspective view showing a configuration of an erroneous connection prevention / sealing device of the erroneous connection prevention / sealing apparatus according to the present invention. FIG. 2A is a front view showing a state in which an opening / closing portion is opened in the above-described erroneous connection prevention / sealing device, and FIG. 2B is an opening / closing portion in the above erroneous connection prevention / sealing device. FIG. 2 (c) is a bottom view showing a state where sealing is performed on the opening / closing part of the erroneous connection preventing / sealing device in the closed state in FIG. 2 (b). is there. FIG. 3 (a) is an explanatory view showing a state in which after the entire watt-hour meter is removed, an erroneous connection prevention / sealing instrument is attached, and further, each wiring is connected. FIG. It is a principal part enlarged view which shows the state which performed the sealing process to the opening / closing part from the state which connected the wiring to the instrument for incorrect connection prevention and sealing of (a). FIG. 4 shows the structure of a terminal part that can be separated from and combined with the meter part of the watt hour meter, the structure of the meter part, and the structure of the cover that covers the terminal part of the device for preventing and sealing misconnection according to the present invention It is explanatory drawing. FIG. 5 is an explanatory diagram illustrating a structure for coupling the meter unit and the terminal unit of the watt-hour meter. FIG. 6 is an explanatory diagram for explaining the structure for the connection between the terminal part and the lid of the watt-hour meter and the sealing process. FIG. 7 is different from the device shown in FIG. 4 among the terminal part that can be separated from and combined with the meter part of the watt hour meter and the cover that covers the terminal part in the erroneous connection preventing / sealing device according to the present invention. It is explanatory drawing explaining other embodiment used as the structure of this. FIG. 8A is an explanatory diagram showing a conventional example showing a state in which the entire watt-hour meter is removed when the power contract is abolished and electricity supply is stopped, and FIG. 8B is a diagram illustrating FIG. It is a principal part enlarged view in the wiring side among the states which removed the whole watt-hour meter of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Misconnection prevention and sealing instrument 2 Housing | casing 2A Upper surface 2B Front surface 2C Rear surface 2D Side surface 2E Bottom surface 3 thru | or 8 Wire connection hole 9 Power supply side wiring 10 Power supply side wiring for grounding 11 Power supply side wiring 12 Load side wiring 13 Grounding Load side wiring 14 Load side wiring 15, 16 Screw hole 17, 18 Male thread 19, 20 Mounting hole 21 Door mechanism (opening / closing part)
DESCRIPTION OF SYMBOLS 22 Bearing part 23 Rotating shaft 24 Door body 25, 26 Screw hole 27 Cut and raised part 28 Insertion hole 29 Electricity meter 30 Instrument box 31 Sealing screw 32 Insertion part 33 Head 34 Holding part 35 Through hole 36 Sealing lead 37 Sealing wire 38 instrument section 39 terminal section 40 terminal 41 ground terminal 42 terminal 43 terminal 44 ground terminal 45 terminal 46 slit 47 protrusion 48 head 49 to 51 input terminal 52 to 54 output terminal 55 to 60 wiring connection hole 61 to 66 connection Hole 67 Metal part 68 Engagement hole 69 Mounting hole 70 Fixing tool 71 Cover body 72 Wall part 73 Wall part 74 Projection part 75 Seal 76 Wall part 77 to 83 Metal part

Claims (5)

Incorrect connection having a case, a wire connection hole provided in the same arrangement as the wire connection hole of the terminal portion of the watt hour meter, and a fastening means for fastening the wire connected through the wire connection hole A device for preventing mis-connection / sealing, characterized by comprising a device for preventing / sealing. 2. The erroneous connection preventing / sealing instrument has an opening / closing part that covers the fastening means so as to be openable and closable, and has sealing means for sealing a state in which the fastening means is covered by the opening / closing part. Device for preventing incorrect connection and sealing as described in 1. A watt-hour meter terminal unit that can be separated and combined freely, and a misconnection prevention / sealing device comprising a cover covering the terminal unit,
The terminal portion is provided with a housing, a wiring connection hole provided in the housing to which wiring can be connected, and an instrument portion of a watt hour meter provided on the opposite side of the wiring connection hole with respect to the housing. A connection hole portion connectable to the terminal of the terminal, and fastening means for fastening the wiring connected from the wiring connection hole,
The cover body includes a first wall portion that covers the connection hole portion and a second wall portion that covers the fastening means,
The terminal part and the cover are provided with sealing means for sealing the state where the cover covers the fastening means of the terminal part. A watt-hour meter comprising a meter portion that can be joined to the terminal portion according to claim 3 via an engaging means,
The instrument part has a terminal connected to a connection hole part of the terminal part, and a protruding width of a grounding terminal among the terminals is larger than a protruding width of a non-grounding terminal. Electricity meter. A meter unit of the watt-hour meter is a terminal unit of the watt-hour meter that can be separated and combined, and an erroneous connection prevention / sealing device comprising a cover covering the terminal unit,
The terminal portion is provided with a housing, a wiring connection hole provided in the housing to which wiring can be connected, and an instrument portion of a watt hour meter provided on the opposite side of the wiring connection hole with respect to the housing. A metal part of a terminal connectable with the connection hole part, and a fastening means for fastening the wiring connected through the wiring connection hole,
The cover includes a wall portion for surrounding the metal portion of the terminal, and a wall portion for surrounding the metal portion of the terminal and covering the fastening means,
The terminal part and the cover are provided with sealing means for sealing the state where the cover covers the fastening means of the terminal part.

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