JP4959544B2 - Low voltage line branching device - Google Patents

Description

  The present invention relates to a low-voltage line branching device for branching a low-voltage lead-in line drawn into each door from a low-voltage trunk line arranged in an underground space such as an electric wire common groove or a tunnel.

  Until now, power was supplied to each house by drawing low-voltage service lines branched from the low-voltage trunk line built on the power pole into each house, but the utility poles, low-voltage main line, and low-voltage service line could damage the landscape, In recent years, undergrounding has been promoted in which low-voltage trunk lines are installed in underground spaces such as cable common grooves and tunnels, and low-voltage lead lines branched from the low-voltage trunk lines are drawn into each house. It's getting on.

  In this way, underground water and rainwater flow into the underground space, and there is a risk of the submerged portion of the low-voltage trunk line and low-voltage lead-in line being submerged. From the viewpoint, waterproofing measures are required for the branching portion of the low-voltage lead-in wire.

  For this reason, measures such as wrapping waterproof tape around places that require waterproofing have been taken, but it is necessary to branch the low-voltage lead-in line for each door, and liquid-tight, There is provided a branching device that can branch a low-voltage lead-in line from a low-pressure main line in a state.

  Such a branching device includes a pair of first ports for inserting the low-voltage trunk lines divided into the primary side and the secondary side, and a plurality of second ports for inserting the low-voltage lead-in wires.

  The branching device includes a conductive core in an electrically insulating casing, and the conductors of the low-voltage trunk line and the low-voltage lead-in line inserted into the first port and the second port are electrically connected to the core. It has become so. As a result, the branching apparatus is configured such that the low-voltage trunk line and the low-voltage lead-in line are electrically connected via the core.

  The branching device is provided with a sealing member for preventing water from flowing in through a gap between the first port and the second port into which the low-pressure trunk line and the low-voltage lead-in line are inserted. That is, the branching device is provided with a sealing member for liquid-tightening between the inner peripheral surface of the first port and the outer periphery of the low-pressure trunk line and between the inner peripheral surface of the second port and the outer periphery of the low-voltage lead-in wire. It has been.

The sealing member is made of a gel material filled in a casing. The sealing member is filled and sealed in the first port and the second port until the low-pressure trunk line or the low-voltage lead-in line is inserted, and the first port and the second port (gel) are filled with the low-pressure trunk line or the low-pressure line. By inserting the lead-in wire, a gel is interposed between the outer periphery and the inner peripheral surface of the first port and the second port so that the inside of the casing can be made liquid-tight (for example, , See Patent Document 1).
JP-T-2006-511924

  However, since the branching device having the above-mentioned configuration must divide the low-voltage trunk line at the installation location, when the low-voltage trunk line is newly installed, the low-voltage trunk line is divided, the insulation coating is removed, and the connection to the branching device is performed. The process is complicated and the work is complicated. In addition, in the case of the existing low-voltage trunk line, power is already supplied to each house, so a branch device must be attached to the low-voltage trunk line that is in the power receiving state. There is a problem that a temporary power outage is forced because the connection is not possible unless it is divided.

  Therefore, in view of such circumstances, the present invention can be easily attached without dividing the low-voltage trunk line regardless of whether it is a new installation or an existing installation, and the low-voltage lead-in wire can be electrically connected in a liquid-tight state. It is an object to provide a low-voltage line branching device.

A low-voltage line branching device according to the present invention partially applies an insulation coating of the low-voltage trunk line to branch the low-voltage lead line drawn from the low-voltage trunk line to each door without dividing the low-pressure trunk line arranged in the underground space. A connecting means configured to be electrically connectable to the removed conductor and a plurality of connection ports configured to allow insertion of a low-voltage lead-in wire are formed and electrically connected to the connecting means. And a gel-like sealing that can be elastically deformed, with each connection port being able to puncture the low-voltage lead-in wire and a device body with a conductive member configured to be electrically connectable to the low-voltage lead-in wire inserted into the connection port A low-voltage line branching device sealed with a member, wherein the conductive member has a conductive member main body formed in a block shape, and is protruded from one side of the conductive member main body, and a tip portion is connected to the connecting means. Together and a conductive connecting portion which is, on the other side of the conductive member body, conductor insertion hole for inserting the conductor of the low pressure drop cable is formed corresponding to the arrangement of the connection ports, casing or the the apparatus main body It is configured to fix the low-voltage lead wire inserted into the conductor insertion hole directly or indirectly at the tip of the push screw, including a fixing means including a push screw screwed into at least one of the conductive members, The connecting conductive portion is connected to the connecting means so that the trunk line to which the connecting means is connected and the low-voltage lead-in line inserted into the connection port are orthogonal to each other.

According to the low-voltage line branching device, each connection port is sealed with a gel-like sealing member that can puncture and elastically deform the low-voltage lead-in wire, so that liquid (water) is supplied from the connection port to the inside of the device body. Inflow can be prevented. And if a connection means is connected to the conductor of a low voltage | pressure main line, the electrically-conductive member in an apparatus main body will be in a receiving state. In this way, by connecting only one connection means to the low-voltage trunk line, it is possible to make an electrical connection (the low-voltage service line can be branched) even if the low-voltage service line is inserted into any of the plurality of connection ports. Can do. Moreover, since the sealing member can puncture the low pressure lead wire and is elastically deformable, the low pressure lead wire can be inserted into the connection port without interfering with the sealing member. After insertion, the insulation coating of the low pressure lead wire and the connection port The sealing member is in close contact with the inner peripheral surface. Thereby, it is possible to prevent the liquid (water) from flowing into the apparatus main body even in a state where the low-voltage lead-in line is branched. Even if it is necessary to take waterproof measures for connection means with waterproof tape, etc., if waterproof measures for one connection means are taken, it will be possible to branch multiple low-voltage lead wires, so the branch part of the low-voltage lead wire There is no need to take waterproof measures every time, and work efficiency is greatly improved. Further, by projecting the push screw into the conductor insertion hole, the conductor of the low-voltage lead-in wire in the conductor insertion hole can be pressed and fixed with the push screw.

  As one aspect of the present invention, the connecting means fastens a pair of sandwich bodies having conductivity and at least one of which is electrically connected to the conductive member, and a pair of sandwich bodies sandwiching a conductor. It is preferable to provide fastening means. If it does in this way, it can connect easily and reliably with respect to the conductor of a low voltage | pressure trunk line.

As another aspect of the present invention, the connection port is preferably arranged side by side in the axial direction of the trunk line to which the connection means is connected .

  More preferably, the fixing means includes a fixing member attached to the distal end portion of the push screw, and a recess for accommodating the fixing member is formed on the inner peripheral surface of the conductor insertion hole, and the solid member is spaced apart from each other. A pair of pressing pieces facing each other and a connecting piece connecting the base ends of the pair of pressing pieces, and inserted into the connecting piece so that the tip of the pressing screw is interposed between the pair of pressing pieces. In addition, the fixing member may be prevented from coming off, and the conductor of the low-voltage lead-in wire may be pressed with an interval in the axial direction with three of the pair of pressing pieces and the tip of the pressing screw. If it does in this way, the conductor of the low voltage | pressure lead-in wire inserted in the conductor insertion hole can be fixed more reliably.

As still another aspect of the present invention, the waterproof cover further covers a connecting means connected to the conductor of the low-voltage trunk line, the waterproof cover comprising a pair of divided covers that are overlapped with each other, and a gel filled in each divided cover And a sealing member having a shape, and the connecting means may be sandwiched between both sealing members. If it does in this way, it will be in the state where this sealing member adhered to the connecting means by putting up the division cover and pinching the connecting means with the sealing member. Thereby, reliable waterproofing to the connecting means can be achieved without performing a complicated operation such as winding a waterproof tape. As still another aspect of the present invention, the casing of the apparatus main body has a box-shaped main body accommodating portion in which substantially the entire surface of one side is opened as a loading port, and the conductive member main body is accommodated, and the main body accommodating portion. A casing body that is provided with a cylindrical housing portion that protrudes from a wall portion facing the loading port and accommodates the connecting conductive portion; and a closing member that blocks the loading port, and an outer surface of the closing member It is preferable that the connection port is protruded.

  According to the low-voltage line branching device according to the present invention, it is possible to easily attach the low-voltage trunk line without dividing it regardless of whether it is newly installed or existing, and to electrically connect the low-voltage lead-in line in a liquid-tight state. An excellent effect can be achieved.

  Hereinafter, a low-voltage line branching apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the low-voltage line branching apparatus according to the present embodiment has a low-voltage lead-in line B <b> 1 that is drawn into each door from low-voltage trunk lines A <b> 1, A <b> 2, A <b> 3, A <b> 4 arranged in an underground space T such as an electric wire common groove or a tunnel. , B2, B3, and B4. The low-voltage trunk lines A1, A2, A3, and A4 include a ground line A1, an electric lamp line A2, a common line A3, and a power line A4. These four lines are arranged as a set. The cable diameters of the ground wire A1, the power line A2, the common line A3, and the power line A4 are set according to their roles. Generally, the ground line A1 and the power line A4 are 150 sq, the power line A2 and The shared line A3 is set to 250 sq.

  The low-voltage line branch device 1 according to the present embodiment is attached to each low-voltage trunk line A1, A2, A3, A4, and is shared by the ground B1, the power B4, and the lamp B2 that are branched by each low-voltage line branch device 1. Each low-voltage lead-in line B1, B2, B3, B4 of B3 is taken as a set and is drawn out from the ground to the ground. Note that the number of low-voltage lead-in wires B1, B2, B3, B4 drawn in depending on the contract with the electric power company is four or less (for example, two of the ground B1 and the common B3, or two of the ground B1 and the lamp B2, the ground B1, In some cases, the power B4, the three lights B2, the ground B1, the common B3, the light B2 or the power B4, etc.

  The low-voltage line branching apparatus 1 according to the present embodiment is configured on the assumption that it is attached to the low-voltage trunk lines A1, A2, A3, A4. As shown in FIGS. 2 to 5, the low-voltage trunk lines A1, A2, A3, The connection means 10 configured to be electrically connectable to a conductor exposed by partially removing the insulating coating of A4 and the low-voltage lead-in wires B1, B2, B3, B4 are configured to be electrically connectable. The apparatus main body 20 is provided.

  The connection means 10 according to the present embodiment includes a pair of sandwiching bodies 100a and 100b configured to sandwich the conductor from both sides in the radial direction, and a fastening means 150 that fastens the pair of sandwiching bodies 100a and 100b. ing. Each of the pair of sandwiching bodies 100a and 100b is made of a conductive metal material, and sandwiching body bodies 101a and 101b each extending in one direction and having a cross-sectional shape viewed from the one direction formed into an arc shape; A pair of flange portions 102a, 102a, 102b, and 102b extending outward from both end portions extending in the one direction of the sandwiching body main bodies 101a and 101b are provided.

  The pinching body main bodies 101a and 101b are set such that the radius of curvature of the inner peripheral surface is substantially equal to or slightly larger than the radius of the conductors of the low-voltage trunk lines A1, A2, A3, and A4. In the sandwich body bodies 101a and 101b according to the present embodiment, the radius of curvature of the inner peripheral surface is slightly larger than the radius of the conductors of the low-voltage trunk lines A1, A2, A3, and A4 (the conductors of the electric lamp line A2 having a large diameter and the conductor of the common line A3). In addition to being set large, the angle of the two imaginary lines connecting the center of curvature and the both end portions is formed to be 180 ° or less, and the cross section is inferior arc. Thus, when the conductor is sandwiched between the pair of sandwiching bodies 100a and 101b, the ends extending in one direction of the sandwiching body bodies 101a and 101b do not interfere with each other, and the sandwiching body bodies 101a and 101b The inner peripheral surface of 101b is in close contact with the outer periphery of the conductors of any of the low-voltage trunk lines A1, A2, A3, A4 of the ground wire A1, the electric lamp line A2, the common line A3, and the power line A4.

  Each of the pair of flange portions 102a, 102a, 102b, 102b is formed of a rectangular metal plate, and one end edge extending in the longitudinal direction extends over the entire length of the side end portion of the sandwiching body main body 101a, 101b. Connected. Each of the flange portions 102a, 102a, 102b, and 102b is formed with a plurality of through holes (three through holes in the present embodiment) at intervals in the longitudinal direction. Accordingly, the pair of sandwiching bodies 100a and 100b are arranged so that the inner peripheral surfaces of the respective sandwiching body main bodies 101a and 101b face each other, so that the respective flange portions 102a, 102a, 102b and 102b also face each other. The through holes of the flange portions 102a, 102a, 102b, and 102b face each other (communicate).

  The fastening means 150 includes bolts 151 that are inserted through the through holes of the flange portions 102a, 102a, 102b, and 102b, and nuts 152 that are screwed into the bolts 151.

  Thereby, the connection means 10 according to the present embodiment is inserted into the through holes of the flange portions 102a, 102a, 102b, and 102b in a state where the conductors of the low-voltage trunk lines A1, A2, A3, and A4 are sandwiched between the sandwich body main bodies 101a and 101b. The nuts 152 are screwed into the inserted bolts 151 and the pair of sandwiching bodies 100a and 100b are fastened to be attached in an electrically connected state to the conductors of the low-voltage trunk lines A1, A2, A3 and A4. Be able to.

  The apparatus main body 20 is formed with a plurality of connection ports 202b through which low-voltage service lines B1, B2, B3, and B4 can be inserted, and the low-voltage service lines B1, B2, B3, and B4 inserted into the connection ports 202b. The connection means 10 is electrically connected. Specifically, as shown in FIGS. 5A and 5B, the apparatus main body 20 includes a casing 200 made of an insulating material, a conductive member 210 built in the casing 200, and a casing 200. And fixing means 220 for fixing the low-voltage lead wires B1, B2, B3, B4 inserted into the connection ports 202b to the conductive member 210, and a sealing member for sealing each connection port 202b. 230.

  The casing 200 according to the present embodiment is a resin molded product, and a loading port H into which the conductive member 210 is loaded is formed. The casing main body 201 in which the conductive member 210 is installed, and the loading port H of the casing main body 201 are formed. And a closing member 202 for closing.

  The casing main body 201 has a box-shaped main body accommodating portion 201a in which a substantially entire area of one surface is opened as a loading port H, and a conductive member main body 211 described later of the conductive member 210 is accommodated, and a loading port H of the main body accommodating portion 201a. The cylindrical housing portion 201b is provided so as to protrude from the opposing wall portion and accommodate a connecting conductive portion 212 (described later) of the conductive member 210.

  As shown in FIGS. 2 and 3A, the main body accommodating portion 201a is formed in a horizontally long shape so that the loading port H has a substantially rectangular shape. One of the wall portions that defines the loading port H is formed with operation portions 203 that are accessible to the fixing means 220 from the outside. Since the apparatus main body 20 according to the present embodiment has a plurality of connection ports 202b as described above, a plurality of operation sections 203 are also formed side by side corresponding to the connection ports 202b.

  5 (a) and 5 (b), each operation portion 203 can open and close the cylindrical portion 204 that protrudes from the outer surface of the wall portion and the opening of the cylindrical portion 204. It is comprised with the cover part 205 .... The cylindrical portions 204 are integrally formed with the casing body 201 so that the inside (inner hole) communicates with the inside of the body housing portion 201a. A part of the lid portion 205 is hinged to the outer surface of the cylindrical portion 204, so that the opening of the cylindrical portion 204 can be opened and closed. The lids 205 are provided with packings 206 on the inner surface, and the packings 206 are pressed against the upper end surfaces of the cylindrical parts 204 in a state where the openings of the cylindrical parts 204 are closed. Liquid-tight state. In order to maintain the lids 205 in this liquid-tight state, in this embodiment, the locking claws 207 are convex at positions opposite to the hinged positions of the lids 205 with respect to the cylindrical parts 204. The locked portions 208 are projected on the outer surface of the cylindrical portions 204, and the locked portions 208 are closed in a state where the upper ends of the cylindrical portions 204 are closed by the lid portions 205. The locking claws 207 are locked.

  The cylindrical housing portion 201b is formed integrally with the main body housing portion 201a so that the inside communicates with the inside of the main body housing portion 201a. The cylindrical housing part 201b according to the present embodiment is formed at a substantially central position in the longitudinal direction of the main body housing part 201a.

  The casing 200 according to the present embodiment is configured to close the loading port H by fitting the closing member 202 to the loading port H. In order to maintain the fitted state, the casing 200 is accommodated. In the portion 201a, engaged portions 209b ... for engaging engagement claws 209a ... described later provided on the closing member 202 are formed. Specifically, the casing body 201 has a loading port H formed with a larger diameter than the back side, and a hole 209 into which an engaging claw 209a... The engaged portion 209b... Is constituted by a step formed in a part of the inner periphery of the hole 209. As a result, with the closing member 202 fitted into the casing body 201, the engaging claws 209a can be engaged with the engaged portions 209b to keep the loading port H closed. .

  The closing member 202 includes a plate-like base portion 202a fitted into the loading port H of the main body housing portion 201a, and a cylindrical connection port 202b projectingly provided on one surface of the base portion 202a. I have. The base portion 202a is formed corresponding to the shape (rectangular shape) of the loading port H (opening) of the main body housing portion 201a, and a through hole (not numbered) is formed corresponding to the arrangement of the connection ports 202b. Has been. A plurality of connection ports 202b are provided at intervals in the longitudinal direction of the closing member 202, and the inside communicates with the hole of the base portion 202a. As a result, the closing member 202 penetrates through the hole of the base portion 202a and the hole of the connection port 202b.

  In the closing member 202 according to the present embodiment, the engaging claws 209a are protruded on the other surface side of the base portion 202a. A plurality of the engaging claws 209a are provided around the base portion 202a at intervals, and as described above, can be engaged with the engaged portions 209b provided in the main body accommodating portion 201a. Yes.

  The conductive member 210 is made of a conductive metal material, and includes a conductive member main body 211 formed in a block shape, and the connection conductive portion 212 protruding from the outer surface of the conductive member main body 211. Yes.

  The conductive member main body 211 is set so that the outer dimension corresponds to the inner dimension of the casing main body 201, and the conductive member main body 211 is fitted into the casing main body 201 with the outer surface substantially contacting the inner surface of the casing main body 201. ing. The conductive member main body 211 is set so that one surface on the loading port H side is recessed from the end of the loading port H by a predetermined amount in a state where the conductive member main body 211 is fitted into the casing main body 201. That is, in a state where the closing member 202 is attached to the casing main body 201, a predetermined amount of gap (a loading port sealing portion 231 described later of the sealing member 230) is accommodated between the inner surface of the closing member 202 (base portion 202a). The dimension is set so that a (space) is formed.

  Further, a plurality of conductor insertion holes 213 for inserting the conductors of the low-voltage lead wires B1, B2, B3, B4 are formed in the conductive member main body 211 at intervals in the longitudinal direction (see FIG. 4). . That is, the conductive member main body 211 has a plurality of conductor insertion holes 213 formed so as to be substantially concentric with the connection ports 202b of the closing member 202 that closes the loading port H. Further, the conductive member main body 211 is formed so that a screw hole 214 that is substantially concentric with the operation portion 203 of the casing main body 201 passes through the outside and the conductor insertion hole 213. Has been. That is, screw holes 214 extending in a direction substantially orthogonal to the conductor insertion holes 213 are formed in a surface facing the wall portion of the casing body 201 in which the operation portions 203 are formed. Further, the conductive member main body 211 is provided in the inner periphery of the conductor insertion holes 213... So that a recess 215 for accommodating a fixing member 222 described later of the fixing means 220 includes the opening of the screw hole 214. The recess 215 is set to a depth that can completely accommodate the fixing member 222.

  The connection conductive portion 212 includes a substantially cylindrical connection main body portion 212 a having a base end connected to the conductive member main body 211, and a connection portion that extends from the distal end of the connection main body portion 212 a and is connected to the connection means 10. 212b. The connection main body portion 212 a is formed integrally with the conductive member main body 211 and is inserted into the cylindrical housing portion 201 b of the casing main body 201. That is, the conductive member 210 is fitted into the casing main body 201 with the connecting main body portion 212a at the top, so that the connecting main body portion 212a is accommodated in the cylindrical accommodating portion 201b and the conductive member main body 211 is accommodated in the main body. It is accommodated in the part 201a.

  The connecting portion 212 b is formed in a plate shape, and one end is connected to the tip of the connecting conductive portion 212. The connecting portion 212b is formed integrally with the connecting main body portion 212a. In the present embodiment, the connecting portion 212b is provided along the parallel direction of the conductor insertion holes 213 (connection ports 202b...). And although this connection part 212b is connected with the connection means 10, in this embodiment, the fastening means 150 (bolt 151 ... and nut 152 ...) which fastens a pair of clamping body 100a, 100b is used. Are connected. That is, a through hole (not numbered) through which the bolts 151... Of the fastening means 150 are inserted is formed in the connecting portion 212b and overlapped with the flange portions 102a and 102a of the sandwiching bodies 100a and 100b. The bolts 151 are inserted into the through holes and nuts 152 are screwed into the bolts 151 so that the connection means 10 is connected to the conductors of the low-voltage trunk lines A1, A2, A3, A4. It has become.

  The fixing means 220 according to this embodiment includes a push screw 221 that is screwed into the screw hole 214 of the conductive member main body 211 and a fixing member 222 that is attached to the tip of the push screw 221. The push screw 221 has a rod-shaped male screw portion 221a continuously provided on a head that can be operated by a tool, and a pin portion 221b having a smaller diameter than the male screw portion 221a is provided continuously at the tip of the male screw portion 221a. Has been. The push screw 221 has a head located inside the operation portion 203 with the upper end opening of the cylindrical portion 204 closed with a lid portion 205, and the tip of the pin portion 221b has a conductor insertion hole 213 ... The length is set so as to be in a retracted state (a state positioned in the recess 215). Accordingly, the push screw 221 is configured such that the distal end side thereof can be withdrawn / retracted from the conductor insertion holes 213... By operating the head.

  The fixing member 222 is formed by bending a metal piece into a U-shape, and a pair of pressing pieces 222a and 222a facing each other with a gap therebetween, and base ends of the pair of pressing pieces 222a and 222a are connected to each other. And a connected connecting piece 222b. The connecting piece 222b has a hole (not numbered) for inserting the pin portion 221b. As a result, the connecting piece 222b can be inserted in a state where the tip of the push screw 221 is interposed between the pair of pressing pieces 222a and 222a. The distal end portion of the push screw 221 is prevented from being detached from the fixing member 222. In this embodiment, the distal ends of the pair of pressing pieces 222a and 222a and the distal end of the pin portion 221b are at substantially the same level. It is prevented from coming off (located on the same surface). Thereby, the fixing means 220 according to the present embodiment is configured such that the conductors of the low-voltage lead wires B1, B2, B3, and B4 are spaced apart in the axial direction by the three of the pair of pressing pieces 222a and 222a and the tip of the pressing screw 221. It can be pressed.

  Although not shown, the fixing member 222 may be prevented from coming off with, for example, a C-shaped snap ring. However, in the present embodiment, due to the inner diameter of the conductor insertion holes 213 and the arrangement of the fixing member 222. Since the work efficiency of attaching the snap ring is poor, a pin for preventing rotation (for example, a taper) is provided in a hole drilled in the pin portion 221b through a through hole drilled in one of the pressing pieces 222a of the fixing member 222. It is given by press-fitting pins and spring pins.

  The sealing member 230 is formed by molding a gel material, and is formed in a substantially rectangular plate shape corresponding to the shape of the loading port H as shown in FIGS. 4, 5 (a) and 5 (b). The loading port sealing portion 231 and a cylindrical port sealing portion 232 extending from one surface of the loading port sealing portion 231 are configured. The gel material constituting the sealing member 230 may be any material as long as the low-voltage lead-in wires B1, B2, B3, and B4 can be stabbed and elastically deformable (highly recoverable). In view of properties such as property, it is preferable to employ a silincon gel material.

  The loading port sealing portion 231 is interposed between the conductive member 210 (conductive member main body 211) fitted in the casing main body 201 and the closing member 202 (base portion 202a). The thickness is in close contact with the conductive member main body 211 and the base portion 202a of the closing member 202 with the loading port H closed. In the present embodiment, the loading port sealing portion 231 is set to a thickness that is sandwiched between the conductive member main body 211 and the closing member 202 and slightly elastically deformed, and the casing main body 201 and the closing member 202 are liquid-tight. It can be sealed.

  The port sealing portions 232... Are integrally formed with the loading port sealing portion 231. The port sealing portions 232 are press-fitted into the connection ports 202b of the closing member 202, and a plurality of port sealing portions 232 are provided corresponding to the arrangement of the connection ports 202b of the closing member 202. The sealing member 230 (the loading port sealing portion 231 and the port sealing portion 232...) Has the port sealing portion 232... Until the low-voltage lead wires B1, B2, B3, B4 are inserted into the connection ports 202b. The inside of the casing 200 is maintained in a liquid-tight state by filling the inside of the connection port 202b and closely contacting the inner peripheral surface of the connection port 202b. Further, when the low-voltage lead-in wires B1, B2, B3, B4 are inserted into the connection ports 202b, the low-voltage lead-in wires B1, B2, B3, B4 are stuck in the port sealing part 232 ... and the loading port sealing part 231. And the space between the outer periphery of the insulation coating of the low-voltage lead wires B1, B2, B3, and B4 and the inner periphery of the connection port 202b... Fills the inner peripheral surface of the connection port 202b and the low-voltage lead wires B1, B2, and B3. , B4 is in close contact with the outer peripheral surface, and the inside of the casing 200 is maintained in a liquid-tight state.

  In the low-voltage line branching device 1 according to the present embodiment, since the outer surface of the conductive connection means 10 is exposed in a state where the connection means 10 is attached to the low-voltage trunk lines A1, A2, A3, and A4, the waterproofing of the portion is performed. Is planned. Although this waterproofing can be achieved by winding a waterproof tape, the low-voltage line branching device 1 according to the present embodiment includes a waterproof cover 30 shown in FIG. 6 in order to simplify the work.

  The waterproof cover 30 includes a cover main body 300 formed of an insulating material (resin material), and sealing members 302a and 302b that are installed in the cover main body 300. The cover main body 300 is composed of a pair of upper and lower divided covers 301a and 301b, and is configured to be substantially box-shaped as a whole by combining them.

  The cover body 300 is formed with holes 303 through which the low-voltage trunk lines A1, A2, A3, A4 are inserted in a pair of opposed wall portions formed by combining a pair of upper and lower divided covers 301a, 301b. A hole 304 through which the cylindrical housing portion 201b of the low-voltage line branching device 1 is inserted is formed in another wall portion to which the wall portion is connected (see FIG. 8). These holes 303 and 304 are formed by combining the divided covers 301a and 301b. That is, each of the divided covers 301a and 301b is formed with substantially semicircular concave portions 303b, 303b, 304a, and 304b at the portion that becomes the wall portion, and by overlapping these, the concave portions 303b, 303b, 304a, and 304b are formed. One hole 303, 304 is formed.

  In the present embodiment, the pair of divided covers 301a and 301b are hinged on the wall surface facing the wall surface forming the hole 304 through which the cylindrical housing portion 201b is inserted, and can be opened and closed. Also, one split cover 301a has an engaging claw 305 projecting from a wall part that forms a hole 304 through which the cylindrical housing part 201b is inserted, and the engaging claw 305 is engaged with the wall part of the other split cover 301b. An engaged portion 306 to be mated is projected. As a result, by engaging the engaging claw 305 with the engaged portion 306, the pair of divided covers 301a and 301b can be maintained in an integrated state.

  The sealing members 302a and 302b are made of, for example, a silicon-based gel material, and are filled in the respective divided covers 301a and 301b. As described above, the sealing members (gel materials) 302a and 302b in the divided covers 301a and 301b are brought into close contact with each other by combining the pair of divided covers 301a and 301b. As a result, the waterproof cover 30 is configured such that the connecting means 10 attached to the low-voltage trunk lines A1, A2, A3, A4 is sandwiched between the divided covers 301a and 301b, so that the outer surface of the connecting means 10 and a part of the cylindrical housing portion 201b. Sealing members (gel materials) 302a and 302b are brought into close contact with the outer surface, so that the conductive connecting means 10, the connecting portion 212b, and the like can be liquid-tightly covered.

  Next, the usage mode of the low-voltage line branching apparatus 1 according to the present embodiment will be described. In addition, since the usage mode is the same for any of the newly installed low-voltage trunk lines A1, A2, A3, A4 and the existing low-voltage trunk lines A1, A2, A3, A4, the existing low-voltage trunk lines A1, A2, A3, A4 This case will be described as an example.

  First, as shown in FIG. 7 (a), the insulation coating of the low-voltage trunk lines A1, A2, A3, A4 disposed in the underground space T is partially removed according to the size of the connecting means 10, and the internal conductors are removed. To expose. Then, as shown in FIG. 7 (b), the exposed conductor is sandwiched between a pair of sandwiching bodies 100 a and 100 b, and these are fastened by fastening means 150. In this embodiment, in order to connect the connecting part 212b to the connecting means 10 using the fastening means 150, any one of the bolts 151... Inserted through the overlapped flange parts 102a, 102a, 102b, 102b is inserted into the connecting part 212b. Then, the nuts 152 are screwed together. 7B, nuts 152 are screwed together after the middle bolts 151 of the bolts 151 aligned in the longitudinal direction of the flanges 102a and 102a are inserted into the connecting portion 212b.

  Thereafter, as shown in FIG. 7C, the waterproof cover 30 covers the connection means 10 and a part of the distal end side of the cylindrical housing portion 201b in a liquid-tight manner. That is, the pair of divided covers 301a and 301b are overlapped so that the connecting means 10 is sandwiched between the sealing members 302a and 302b, and the engaging claws 305 are engaged with the engaged portions 306. By doing so, the sealing members 302a and 302b are in close contact with the entire outer surface of the connecting means 10 in the waterproof cover 30, and as shown in FIG. 8, as shown in FIG. The attachment of the low-voltage line branching device 1 to A3 and A4 is completed. The low-voltage line branching device 1 is attached to any of the low-voltage trunk lines A1, A2, A3, and A4 of the ground line A1, the electric lamp line A2, the common line A3, and the power line A4 as described above. In this state, the connection port 202b of the apparatus main body 20 is sealed by the port sealing portion 232, and the operation portion 203 is sealed by the packing 206 of the lid portion 205. The inside will be kept completely liquid-tight. Therefore, even if rainwater or the like flows into the underground space T and is submerged, reliable waterproofing can be achieved.

  When the low-voltage service lines B1, B2, B3, and B4 are branched from the low-voltage trunk lines A1, A2, A3, and A4, as shown in FIG. 9A, the insulation coating at the ends of the low-voltage service lines B1, B2, B3, and B4 Is removed to expose the conductor, and the conductor is inserted into any of the connection ports 202b. Since the port sealing portion 232 and the loading port sealing portion 231 are made of a flexible and elastically deformable gel material, as shown in FIG. 9 (b), the low pressure lead-in wire is connected to the connection port 202b as described above. When B1, B2, B3, and B4 are inserted, the low pressure lead-in wires B1, B2, B3, and B4 are stuck to the port sealing portion 232... And the loading port sealing portion 231 by the tip, and finally the connection port 202b. The conductor reaches the conductor insertion holes 213 formed substantially concentrically. In this state, the inside is kept in a liquid-tight state by a sealing member (gel) 230 between the insulating coating of the low-voltage lead wires B1, B2, B3, and B4 and the inner peripheral surface of the connection port 202b.

  Then, when the lid portion 205 is opened and the push screw 221 is turned, the pin portion 221b and the fixing member 222 protrude into the conductor insertion hole 213, thereby suppressing the conductor in the conductor insertion hole 213, The low-voltage service lines B1, B2, B3, and B4 are fixed to the low-voltage line branching device 1. Then, the lids 205 are closed and the upper ends of the cylindrical parts 204 are sealed with the packings 206 so that the inside is completely liquid-tight. As a result, even if rainwater or the like flows into the underground space T and is submerged, reliable waterproofing is achieved.

  In some cases, the low-voltage lead-in wires B1, B2, B3, and B4 drawn into the doors are unnecessary and removed. However, the low-voltage line branching device 1 according to this embodiment has a low pressure because the sealing member 230 is rich in elasticity. Even if the lead-in wires B1, B2, B3, B4 are pulled out from the connection port 202b..., The hole formed by inserting the low-voltage lead-in wires B1, B2, B3, B4 is blocked by the self elasticity (restoring force) of the sealing member 230. Thus, the inside of the apparatus main body 20 is kept in a liquid water state.

  As described above, the low-voltage line branching device 1 according to the present embodiment connects the connecting means 10 after removing the insulation coating of the low-voltage trunk lines A1, A2, A3, and A4 disposed in the underground space T. Therefore, the low-voltage trunk lines A1, A2, A3, and A4 do not need to be divided and can be attached without causing a power failure. In addition, since the gel-like sealing member 230 is provided in the apparatus main body 20, the low-voltage lead-in wires B1, B2, B3, and B4 are not connected, and the low-voltage lead-in wires B1, B2, B3, and B4 are branched. Can also be liquid-tight.

  Further, since a plurality of connection ports 202b... For inserting (connecting) the low-voltage lead-in wires B1, B2, B3, B4 are provided, the low-voltage line branching device 1 is placed at one location on any of the low-voltage trunk lines A1, A2, A3, A4. It is possible to branch a plurality of low-voltage lead-in wires B1, B2, B3, and B4 simply by providing them. In addition, as described above, since it can be liquid-tight even when the low-voltage lead wires B1, B2, B3, B4 are not connected, the low-voltage lead wires B1, B2, B3, B4 can be connected and branched when necessary. it can.

  Furthermore, since the connection means 10 and the like are covered with the waterproof cover 30 in a liquid-tight manner, a complicated operation such as winding a waterproof tape is not required, and the connection means 10 and the like can be waterproofed by a simple operation. Can do.

  Further, in the low-voltage line branching device 1 according to the present embodiment, the fixing means 220 is configured by the pin portion 221b and the U-shaped fixing member 222 into which the pin portion 221b is inserted, so that the low-voltage lead-in wires B1, B2, B3, B4 The conductor can be held at three places, and the low-voltage lead wires B1, B2, B3, B4 can be securely fixed to the low-voltage line branching device 1.

  Note that the low-voltage line branching device of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

  In the above embodiment, the waterproofing cover 30 waterproofs the connecting means 10, but the present invention is not limited to this. For example, a waterproof tape is wrapped around the connecting means 10 to waterproof the connecting means 10. May be. Even if it does in this way, since it will be in the state which can branch a plurality of low voltage service lines B1, B2, B3, B4 only by constructing with respect to one connection means 10 when attaching the low voltage line branching device 1, There is no need to perform waterproofing for each of the low-voltage lead-in wires B1, B2, B3, and B4 as in the prior art, and work efficiency can be improved. However, it goes without saying that it is preferable to use the same method as in the above embodiment in order to waterproof the connection means 10 more efficiently.

  In the above embodiment, the connection means 10 is configured to fasten the pair of independent sandwiching bodies 100a and 100b with the fastening means 150. However, the connection means 10 is not limited to this. For example, the connection means 10 is a pair of sandwiching bodies. One end (the one flange portions 102a, 102a, 102b, 102b) of the bodies 100a, 100b may be hinged and the other end side (the other flange portions 102a, 102a, 102b, 102b) may be fastened. . Moreover, in the said embodiment, although the connection part 212b was connected with the connection means 10 using the fastening means 150 (bolt 151 ... and nut 152 ...) of the connection means 10, for example, the connection part 212b, the connection means 10, Of course, it is also possible to connect them so that they cannot be removed by welding or the like.

  Further, the connecting means 10 is not limited to the one that fastens the pair of sandwiching bodies 100a and 100b with the fastening means 150. For example, the connecting means 10 has a C-shaped sleeve portion as shown in FIG. 160 and a connected portion 161 connected to the conductive member 210 and connected to the sleeve portion 160 may be provided.

  In this case, the sleeve portion 160 is made of a conductive metal material, and the conductors of the low-voltage trunk lines A1, A2, A3, and A4 are inserted over the entire length in the axial direction by dividing a part in the circumferential direction. A slit (opening) is formed, and is configured to be plastically deformable in the radial direction. The sleeve portion 160 is introduced into the conductors of the low-voltage trunk lines A1, A2, A3, and A4 along the slits, and is compressed in the radial direction so as to be plastically deformed to come into close contact with the conductor. . Thereby, the sleeve portion 160 can be electrically connected to the conductors of the low-voltage trunk lines A1, A2, A3, A4 without dividing the low-voltage trunk lines A1, A2, A3, A4, as in the above embodiment. . In this case as well, it is a matter of course that the connecting means 10 having the above configuration is waterproofed by the waterproof cover 30 or the waterproof tape as described in the above embodiment.

  The connected portion 161 may be configured to be electrically connected to the conductive member 210. For example, the connected portion 161 is formed of a metal piece extending from one end of the sleeve portion 160, and is connected to the conductive member 210. 212b ′ may be connected with a bolt B and a nut N. In such a connected portion 161, the portion connected to the conductive member 210 intersects (perpendicular to) the axis of the sleeve portion 160 so as to prevent interference between the apparatus main body 20 and the low-voltage trunk lines A 1, A 2, A 3, A 4. For example, as shown in FIG. 10, it is bent into an L shape, and the tip side (portion where the conductive member 210 is connected) extends in a direction perpendicular to the axis of the sleeve portion 160. Alternatively, the sleeve portion 160 may be formed so as to extend from an intermediate position in the axial direction. Of course, the connecting portion 212 b ′ of the conductive member 210 is appropriately formed according to the form of the connected portion 161.

  Further, as shown in FIG. 11, the connecting means 10 may be formed as a clamp that sandwiches the conductors of the low-voltage trunk lines A1, A2, A3, and A4. Specifically, the connecting means 10 includes a clamp body 170 including a pair of facing portions 170b and 170c facing each other with a predetermined interval by connecting base ends via a connecting portion 170a, and a pair of A movable body 171 disposed between the opposing portions 170b and 170c and provided so as to be able to come into contact with and separate from one opposing portion 170b is threaded through the other opposing portion 170c. One end portion is connected to the shaft 171 so as to be rotatable around an axis, and the other end is connected to a connecting screw body 172 to which the conductive member 210 is connected. At least the moving body 171 and the connecting screw body 172 are conductive. It may be formed of a certain metal material. In this way, it is possible to intervene the conductor without dividing the low-voltage trunk lines A1, A2, A3, A4 between the one opposing portion 170b and the moving body 171 from the front end side of the opposing portions 170b, 170c, The connecting screw body 172 is rotated and screwed in one direction, and the moving body 171 connected to the connecting screw body 172 is moved to the one opposing portion 170b side, whereby one opposing portion 170b and the moving body 171 are The connection means 10 and the conductor can be electrically connected by sandwiching the conductor. Further, by rotating the connecting screw body 172 in the other direction, the moving body 171 moves to the other facing portion 170c side, so that the pinching (connection) to the conductor can be released, and it is easy when it becomes unnecessary. Can be removed. Even in this case, it is a matter of course that the connecting means 10 having the above configuration is waterproofed by the waterproof cover 30 or the waterproof tape as described in the above embodiment.

  In this case, the clamp main body 170 has a low-pressure trunk line A1, A2, A3 whose surface facing the other facing portion 170c in one facing portion 170b and the surface facing the one facing portion 170b in the moving body 171 are low-voltage trunk lines A1, A2, A3. , A4 is preferably composed of a curved surface having a radius of curvature corresponding to the outer diameter of the conductor. In this way, the two curved surfaces can be sandwiched with the curved surfaces along the outer peripheral surfaces of the conductors of the low-voltage trunk lines A1, A2, A3, and A4, and the electrical connection is improved. Further, when the connecting means 10 is configured like a clamp in this way, when the connecting means 10 and the conductors of the low-voltage trunk lines A1, A2, A3, and A4 are electrically connected, the moving body 171 is connected to one opposing portion 170b. Since it is necessary to rotate the connecting screw body 172 in order to move it to the side, if the workability when connecting the connecting means 10 to the conductors of the low-voltage trunk lines A1, A2, A3, A4 is considered, the connecting means after the connection 10 and the conductive member 210 are preferably configured to be electrically connected. For example, a protruding piece is provided at the other end of the connecting screw body 172, and the connecting portion 212 and the protruding piece of the conductive member 210 are connected to a bolt and a nut. As shown in FIG. 11, a male screw is formed on either one of the other end side of the connecting screw body 172 or the connecting portion 212b ″ of the conductive member 210, as shown in FIG. The other end of the, or an internal thread formed on the other one of the connecting portion 212 '' of the conductive member 210, may be be connected by screwing together. Of course, as described above, in order to screw (rotate) the connection screw body 172, the other end portion of the connection screw body 172 can be operated with a tool.

  In the above-described embodiment, the fixing member 222 is attached to the distal end portion of the push screw 221 as the fixing means 220. However, the present invention is not limited to this. For example, the fixing means 220 may be configured by only the push screw 221. In the above embodiment, the push screw 221 is screwed into the conductive member 210. However, for example, a through hole may be formed in the conductive member 210, and the push screw 221 may be screwed into the casing 200. Then, the push screw 221 may be screwed into the conductive member 210 and the casing 200.

  Further, in the above embodiment, the low voltage lead-in wires B1, B2, B3, and B4 are fixed by the fixing means 220. However, the present invention is not limited to this, and for example, the inner circumference of the conductor insertion hole 213 of the conductive member 210 The fixing means is constituted by protrusions or claws protruding on the surface, and the low-voltage lead wires B1, B2, B3, B4 inserted into the conductor insertion holes 213 are locked to the protrusions or claws so as to prevent dropping. May be. Alternatively, the conductor insertion hole 213 may be formed to have substantially the same diameter as the conductors of the low-voltage lead wires B1, B2, B3, and B4, and the conductor may be press-fitted into the conductor insertion hole 213. Therefore, when it is not necessary to operate the fixing means 220 from the outside, it is not necessary to provide the operation unit 203.

  When the operation units 203 are provided, it is not always necessary to attach the lid portions 205 to the cylindrical portions 204a and 204b. For example, a cap capable of crimping the lid portions 205 to the cylindrical portions 204a and 204b. It may be formed as follows.

It is explanatory drawing for demonstrating the object which attaches the low voltage | pressure line branching apparatus which concerns on one Embodiment of this invention, Comprising: The schematic sectional drawing of the underground space in which the low voltage | pressure trunk line and the low voltage | strand lead-in line were arrange | positioned is shown. The whole perspective view except a part (waterproof cover) of the low voltage line branching device concerning the embodiment is shown. It is whole explanatory drawing except a part (waterproof cover) of the low voltage line branching device concerning the embodiment, (a) shows a top view and (b) shows a side view. The cross-sectional view except a part (waterproof cover) of the low-voltage line branching device according to the embodiment is shown. It is sectional drawing of the low voltage | pressure branch device concerning the same embodiment, Comprising: (a) shows II sectional drawing of FIG. 3, (b) shows II-II sectional drawing of FIG. It is a perspective view of the waterproof cover which concerns on the same embodiment, Comprising: The state which opened the division | segmentation cover is shown. It is process drawing for demonstrating the attachment method of the low voltage | pressure branch device concerning the embodiment, (a) shows the state which removed the insulation coating of the low voltage | pressure trunk line, (b) The state which connected the connection means to the conductor of the low voltage | pressure main line is shown, (c) shows the state which covers a connection means with a waterproof cover. It is a whole perspective view of the low voltage line branching device concerning the embodiment, and shows the state attached to the low voltage trunk line. It is explanatory drawing about the method of connecting and branching a low voltage | pressure lead wire to the low voltage | pressure branch device concerning the same embodiment, (a) shows the state which inserts a low voltage | pressure lead wire in a connection port, (b) is a low voltage | pressure Sectional drawing of the state which connected the lead-in wire electrically is shown. The whole perspective view except a part (waterproof cover) of the low voltage line branching device concerning other embodiments of the present invention is shown. The whole perspective view except a part (waterproof cover) of the low voltage line branching device concerning another embodiment of the present invention is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Low voltage | pressure branch device, 10 ... Connection means, 20 ... Apparatus main body, 30 ... Waterproof cover, 100a, 100b ... Clamping body, 101a, 101b ... Clamping body main body, 102a, 102a, 102b, 102b ... Flange part, 150 ... Fastening means 151 ... Bolt 152 ... Nuts 200 ... Casing 201 ... Casing body 201a ... Body housing portion 201b ... Tubular housing portion 202 ... Closure member 202a ... Base portion 202b ... Connection port 203 ... Operation part 204 ... Cylindrical part 205 ... Cover part 206 ... Packing 207 ... Locking claw, 208 ... Locked part, 209 ... Hole, 209a ... engagement claw, 209b ... engaged part, 210 ... Conductive member 211... Conductive member main body, 212... Connected conductive portion, 212 a... Connected main body portion, 212 b. 5 ... concave portion, 220 ... fixing means, 221 ... push screw, 221a ... male screw portion, 221b ... pin portion, 222 ... fixing member, 222a ... pressing piece, 222b ... connecting piece, 230 ... sealing member, 231 ... loading port seal Stop part, 232 ... Port sealing part, 300 ... Cover body, 301a, 301b ... Split cover, 302a, 302b ... Sealing member, 303, 304 ... Hole, 303b, 303b, 304a, 304b ... Recess, 305 ... Engagement claw 306 ... engaged portion, A1 ... ground wire (low pressure trunk line), A2 ... electric light wire (low pressure trunk line), A3 ... shared line (low pressure trunk line), A4 ... power line (low pressure trunk line), B1 ... ground (low pressure lead wire) ), B2: Electric light (low pressure lead-in wire), B3 ... Shared (low pressure lead-in wire), B4 ... Power (low pressure lead-in wire), H ... Loading port, T ... Underground space

Claims (6)

In order to branch off the low-voltage lead line drawn from the low-voltage main line to each door without breaking the low-pressure main line arranged in the underground space, the insulating coating of the low-voltage main line is partially removed to expose the exposed conductor. And a plurality of connection ports configured to be able to insert a low-voltage lead wire are formed, and the low-voltage lead wire inserted into the connection port is electrically connected to the connection means. A low-voltage line branching device including a device main body including a conductive member configured to be electrically connectable, and each connection port sealed with a gel-like sealing member that can puncture a low-voltage lead wire and is elastically deformable The conductive member includes a conductive member main body formed in a block shape, and a connecting conductive portion that protrudes from one side of the conductive member main body and has a distal end portion connected to the connecting means. Moni, on the other side of the conductive member body, conductor insertion hole for inserting the conductor of the low pressure drop cable is formed corresponding to the arrangement of the connection port, at least one of the casing or the conductive member of the apparatus main body on the other hand The low-voltage lead wire inserted into the conductor insertion hole is fixed directly or indirectly at the tip of the push screw, and the connection means is connected. The low-voltage line branching device is characterized in that the connecting conductive portion is connected to the connecting means so that the main line and the low-voltage lead-in line inserted into the connection port are orthogonal to each other.   The connection means includes a pair of sandwiching bodies that have conductivity and at least one of which is electrically connected to the conductive member, and a fastening means that fastens the pair of sandwiching bodies with the conductor sandwiched therebetween. The low-voltage line branching device according to claim 1.   The low-voltage line branching device according to claim 1 or 2, wherein the connection port is arranged side by side in the axial direction of the trunk line to which the connection means is connected. The fixing means includes a fixing member attached to the distal end portion of the push screw, and a recess for accommodating the fixing member is formed on the inner peripheral surface of the conductor insertion hole, and the solid members are opposed to each other with a space therebetween. A pair of pressing pieces and a connecting piece connecting base ends of the pair of pressing pieces, and the fixing screw is inserted into the connecting piece so that the distal end portion of the pressing screw is interposed between the pair of pressing pieces, and a fixing member omission for stopping is performed, any one of claims 1 to 3 is configured so as to press at intervals the conductor of the low pressure drop cable in three tips of a pair of pressing pieces and pressing screws in the axial direction The low-pressure line branching device according to item . The waterproof cover is further provided to cover the connection means connected to the conductor of the low-voltage trunk line, and the waterproof cover includes a pair of divided covers that are overlapped with each other and a gel-like sealing member that is filled in each divided cover. The low-pressure line branching device according to any one of claims 1 to 4 , wherein the means is configured to be sandwiched between both sealing members. The casing of the apparatus main body has a box-shaped main body accommodating portion in which substantially the entire area of one surface is opened as a loading port, and a wall portion facing the loading port of the main body accommodating portion. And a casing main body configured to accommodate the connecting conductive portion and a closing member that closes the loading port, and the connection port is provided on the outer surface of the closing member. Item 6. The low-voltage line branching device according to any one of Items 1 to 5 .

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