JP2004187447A - Lead-in structure and spacer used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lead-in structure without occurrence of short-circuiting caused by a contact between connectors, and to provide a spacer used for the same. <P>SOLUTION: The spacer 2 holds cables 30a-30d to be passed from one side to the other side of the spacer 2 via each fitting hole. As a result, it prevents the connectors 80a-80f mounted to the cables 30a-30d from coming into contact with each other on the other side. Accordingly, if the lead-in structure 1 is used, it can surely prevent the short circuits to be caused by the direct contact of the connectors 80a-80f each other from occurring. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drop-in structure for pulling out a cable wired underground to the ground, connecting the drawn-out cable to a drop-in line, and connecting the drop-in line to a building to be dropped-in, and the drop-in structure. Related to the spacer used in the above.
[0002]
[Prior art]
2. Description of the Related Art In recent years, distribution lines have been often laid underground using cables in order to improve the scenery of city areas, sightseeing spots, and the like. However, many ordinary houses such as condominiums do not have facilities for drawing power from cables buried underground. Therefore, in such a case, a drop-in structure for drawing out the cable to the ground is installed near the building, a drop-in wire is laid between the building and the drop-in structure, and the building is dropped from the drop-in structure. Is drawing power from the cable via
[0003]
Specifically, as shown in FIG. 8, the drop-in structure 100 includes a hollow pole 110 erected on the ground, and a cable buried in the ground is connected to a hollow portion of the pole 110. Through the pole 110 to the outside. In addition, fixtures 114 and 116 are installed on the upper part of the lead-out part 118 from which the cable is drawn out between the pole 110 and the building, and the lead-in wires 140 and 142 Are fixed to the fixtures 114 and 116 except for the connection margins 141 and 143, and are connected to a house. The ends of the cables 130 drawn out from the drawer 118 and the ends of the connection margins 141 and 143 of the lead-in lines 140 and 142 are connected by a plurality of connectors 180 for electrically connecting these.
[0004]
In the drop-in structure 100, the connection margins 141 and 143 of the cables 130 and the drop lines 140 and 142 are simply hung from the draw-out portion 118 and the like. For this reason, an insulating cover is attached to each connector 180.
[0005]
[Problems to be solved by the invention]
However, the cover attached to each connector 180 may be torn or come off when repeatedly hitting, so that even if the cover is attached, the connectors 180 may directly contact each other and cause a short circuit.
[0006]
In view of the above, an object of the present invention is to provide a drawn-in structure in which connecting tools do not contact each other to cause a short circuit, and a spacer used in the drawn-in structure.
[0007]
Means for Solving the Problems and Effects of the Invention
The invention according to claim 1, which has been made to achieve the above object, comprises a hollow pole erected on the ground, and a side surface along the height direction of the pole passing from the ground through the hollow portion of the pole. A plurality of cables drawn out from the drawing holes provided in the outside, a plurality of drop wires that are laid between the pole and the pull-in target, and each of the drop wires, leaving a connection margin at the tip of the drop wire. In a drop-in structure comprising: a fixture for fixing to the pole, and a plurality of connectors for electrically connecting a tip of each of the cables pulled out from the lead-out holes and a tip of a connection margin of each of the drop-in wires, A spacer is provided to separate the ends of the cables or the ends of the connection margins of the drop-in wires so that the connecting tools do not contact each other. In the retraction structure of the present invention, the connecting members are separated by the spacer so as not to hit each other. Therefore, when the retracting structure of the present invention is used, since the connectors do not collide with each other, it is possible to reliably prevent the occurrence of a short circuit.
[0008]
Incidentally, in order to erect the retractable structure at low cost, the spacer may not be fixed to the pole by using a fixing tool or the like as in the second aspect of the present invention. It is a matter of course that the spacer may be fixed to the pole in order to supply the electric power in the form.
[0009]
Next, an invention according to claim 4 is a spacer used in the drop-in structure according to any one of claims 1 to 3, wherein a fitting hole for fitting the cable or the drop-in wire is formed, By holding the cable or the lead-in which is passed from one side of the spacer to the other side through the fitting hole, the connecting device attached to the cable and the lead-in is provided on the other side. It is characterized by preventing contact with each other. If this spacer is used, a pull-in structure having an intended function can be formed, and thus the operation and effect as described for the above-described pull-in structure can be obtained.
[0010]
The method of arranging the insertion holes is not particularly limited. For example, the insertion holes may be formed in a line as in the spacer according to claim 5, or may be formed as in the spacer according to claim 6. The insertion holes may be formed in a staggered manner.
Further, the spacer may be a plate in which a fitting insertion hole is perforated in a plate. What connected the ring-shaped tool which forms the said insertion hole may be sufficient.
[0011]
Further, the spacer has a notch formed in the fitting hole along the depth direction of the fitting hole so as to open the fitting hole. You may. Since the cable or the lead-in wire can be inserted into the fitting hole from the cutout portion of the spacer, the cable or the lead-in wire can be inserted into the fitting hole even after the cable and the lead-in wire are connected.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments to which the present invention is applied will be described.
In addition, FIG. 1 is an overall schematic diagram of a retractable structure among drawings used in the following description.
[0013]
The retraction structure 1 according to the present embodiment includes a hollow pole 10 erected on the ground and a concrete anchor 12 supporting the pole 10. The anchor 12 is attached to the lower end of the pole 10 and is buried in the soil. The anchor 12 is formed in such a size that the pole 10 can be erected by its own weight and the earth pressure around the anchor 10 so that the pole 10 does not fall down due to wind and rain.
[0014]
The incoming cable 3 used in the present embodiment is a bundle of cable electric wires (hereinafter, simply referred to as “cable”), and each cable is provided with a thick insulating coating or the like so as to be laid underground. The lead-in cable 3 is guided from a trunk cable wired in the common groove 5 to a lower part of the lead-in structure 1 via a protective tube 50. The drop cable 3 exits the tube 50, passes through the ground, passes from the lower end of the pole 10 to the upper end of the pole 10 through the hollow portion of the pole 10, and is provided on the side surface of the pole 10 in the height direction. It is pulled out to the outside from a drawing hole described later.
[0015]
The drop wire 4 used in this embodiment is a wire that is wired between the upper end of the pole 10 and, for example, the edge of the roof of the house 6 (corresponding to the drop object of the present invention). 6 is the same as the one that is wired to the wire. The drop-in wire 4 is fixed at the upper end of the pole 10 and connected to the cable 3 drawn out of the draw-out hole, while being fixed to the roof or the like of the house 6, where the extension equipment 60 of the house 6 (FIG. 1). (Indicated by the middle dotted line).
[0016]
Next, the retractable structure 1 of the present embodiment will be described in more detail with reference to FIG.
Here, FIG. 2 is a partially enlarged view of FIG. 1, specifically, an enlarged view of a portion surrounded by a circle in FIG. 1, and is an enlarged view of a portion where a cable is pulled out from an upper end portion of a pole. The poles are partially cut away.
[0017]
The pole 10 constituting the retracted structure 1 of the present embodiment is an iron pole formed in a cylindrical cross section. The pull-in cable 3 drawn from underground as described above is inserted into the hollow portion 10a of the pole 10.
A power draw-in band 14 is wound and fixed near the upper end of the pole 10. The power lead-in band 14 is provided with a hook ring 14 a on the outer peripheral surface, and the hook ring 14 a is wound around the pole 10 so as to face the house 6. The insulator 14c is hooked on the hook ring 14a using the bind wire 14b. The leading ends of three power drop lines 40 are fixed to the insulator 14c, leaving connection margins 41a to 41c, and the plurality of drop lines 40 are connected between the insulator 14c and the house 6. The power lead-in band 14 and the insulator 14c correspond to the fixture of the present invention.
[0018]
In addition, below the power pull-in band 14 of the pole 10, a power free band 16 is wound and fixed. The power adjustable band 16 is different from the power draw-in band 14 in that the power adjustable band 16 includes an adjuster 16a capable of adjusting a size of a ring formed by the band. In addition, the power band 16 includes a pair of insulator connecting pieces 16b, 16b formed in a U-shape in horizontal section on the outer peripheral surface. The power band 16 is wound around the pole 10 such that the insulator connection pieces 16b, 16b face the house 6. An insulator 16c is attached to the tip of the insulator connecting pieces 16b. To the insulator 16c, the leading ends of the three lead wires 42 for the electric light are fixed leaving connection margins 43a to 43c, and the plurality of lead wires 42 are wired between the insulator 6c and the house 6. The power band 16 and the insulator 16c correspond to the fixture of the present invention.
[0019]
Further, below the power band 14 wound around the pole 10 and on the side surface in the height direction of the pole 10, a pull-in cable 3 inserted through the hollow portion 10 a of the pole 10 is drawn out. A drawing hole (not shown) is formed. A conduit 18 made of resin is connected to the outlet hole, and the lead-in cable 3 is guided to the conduit 18 and is drawn out from the distal end thereof.
[0020]
The lead-in cable 3 used in the present embodiment is obtained by combining four cables into a bundle. When the lead-in cable 3 is led to the outside from the conduit 18, it is branched into the cables 30a to 30d, and the cables 30a to 30d are inserted into respective insertion holes of the spacer 2 described later. At the ends of the cables 30a to 30d that have passed through the fitting holes, connectors 80a to 80f for connecting the cables 30a to 30d and the ends of the connection margins 41a to 41c and 43a to 43c of the drop wires 40 and 42, respectively. Is attached.
[0021]
Specifically, among the cables 30a to 30d, one connector 80a is attached to the distal end of the cable 30a (the left end in FIG. 2) for transmitting the U-phase power, and a fuse 82a is attached to the connector 80a. Is connected to the fuse line 81a, and the leading end 41a of the connection margin of the drop wire 40 connected by the sleeve 83a is connected to the fuse line 81a.
[0022]
Two connectors 80b and 80c are attached to the tip of a cable 30b (second from left in FIG. 2) for transmitting V-phase power, and a fuse wire 81b having a fuse 82b is connected to the connector 80b. The leading end of the connection margin 41b of the drop wire 40 connected to the fuse wire 81b via the sleeve 83b is connected. Further, a fuse wire 81c having a fuse 82c is connected to the connection tool 80c, and the tip of a connection margin 43a of the drop wire 40 connected to the fuse wire 81c via the connection tool 85a is connected.
[0023]
One connecting tool 80d is attached to the tip of the grounding cable 30c (the second from the right in FIG. 2), and the connecting tip 80b is connected to the tip 43b of the connection margin of the drop wire 42.
Two connectors 80e and 80f are attached to the tip of a cable 30d (the right end in FIG. 2) for transmitting the power of the W-phase. A fuse wire 81d having a fuse 82d is connected to the connector 80e. The leading end of the connection margin 41c of the drop wire 40 connected to the wire 81d via the connection tool 85b is connected. A fuse wire 81e having a fuse 82e is connected to the connector 80f, and a tip of a connection margin 43c of the drop wire 42 connected to the fuse wire 81e via a connector 85c is connected to the fuse wire 81e.
[0024]
Further, an insulating cover is attached to each of the connection tools 80a to 80f, 85a to 85c and the sleeves 82a to 82e, and is covered so as not to cause a short circuit when they come into contact with each other.
Next, the spacer will be described.
[0025]
Here, FIG. 3 is a perspective view of the spacer used in the retracted structure.
As shown in FIG. 3, the spacer 2 has a plurality of insertion holes 20a to 20d into which the respective cables 30a to 30d can be inserted into a long resin plate along the longest side of the plate. It was formed.
[0026]
The spacer 2 holds the cables 30a to 30d passed from one side to the other side of the spacer 2 through the respective fitting holes 20a to 20d, thereby connecting the cables 30a to 30d. 80a-80f are prevented from contacting each other on the other side.
[0027]
In the retraction structure 1 according to the present embodiment described above, the connectors 80a to 80f are separated by the spacer 2 so as not to hit each other. Therefore, when the retraction structure 1 of the present embodiment is used, the short-circuiting can be reliably prevented since the connecting tools 80a to 80f do not collide with each other. Therefore, even if the insulating covers are not attached to the connectors 80a to 80f, the connectors 80a to 80f can be reliably prevented from coming into contact with each other and causing a short circuit.
[0028]
Lastly, the embodiments of the present invention are not limited to the above-described embodiments at all, and it goes without saying that various forms can be adopted as long as they belong to the technical scope of the present invention.
For example, in the present embodiment, the spacer 2 is not particularly fixed to the pole 10, but the spacer 2 may be fixed to the pole 10 in order to supply electric power in a form that the consumer can feel safe. is there.
[0029]
Further, in the present embodiment, the case where the insertion holes 20a to 20d are formed in a line has been described, but they may be formed in a staggered manner as shown in FIG. As shown in FIG. 5, in order to insert the cables 30a to 30d into the insertion holes 20a to 20d, the notches are cut out along the depth direction of the insertion holes 20a to 20d so that the insertion holes 20a to 20d are opened. The insertion portions 21a to 21d may be formed in the respective insertion holes 20a to 20d. The cuts 21a to 21d are formed slightly smaller than the cables 30a to 30d, and once inserted into the fitting holes 20a to 20d, they are formed at the boundaries between the cuts 21a to 21d and the fitting holes 20a to 20d. The cables 30a to 30d are formed so that the cables 30a to 30d do not fall off due to a step formed by the insertion holes 20a to 20d being slightly larger than the notches 21a to 21d. If the spacer 2 is used, the cables 30a to 30d can be inserted into the insertion holes 20a to 20d from the cuts 21a to 21d even after the retraction structure 1 has been assembled.
[0030]
Further, in the present embodiment, the one in which the fitting holes 20a to 20d are formed in the plate material as the spacer 2 has been described, but as shown in FIG. 6, a substantially hoop-shaped resin ring forming the fitting holes 20a to 20d. What connected the tools 22a to 22d may be used. As shown in FIG. 7, the spacer 2 of the present embodiment includes substantially cylindrical ring-shaped tools 24 a to 24 d which are installed above the elongate base 26 at a predetermined interval from the base 26. May be arranged in parallel along the length direction of the base 26. The ring-shaped tools 24a to 24d of the spacer 2 shown in FIG. 7 have cuts 21a to 21d formed on the side opposite to the side to be attached to the base 26, and the ring-shaped tools forming the cuts 21a to 21d. Conducting wire tools 25a to 25d which open outward from the ends of 24a to 24d in a substantially figure-eight shape are formed. Further, among the conductors 25a to 25d of the spacer of FIG. 7, the conductors 25a and 25d from the ends are connected to the end of the base 26, and the conductors 25b from the conductor 25c and the conductors 25b from the conductor 25b. The conductor 25c is also connected. When the spacers 2 shown in FIG. 7 are used, if the cables 30a to 30d are pressed against the conductors 25a to 25d, the conductors 25a to 25d are opened and the cuts 21a to 21d are opened. It can be inserted into fitting holes 20a to 20d formed by the tools 24a to 24d.
[0031]
The spacer 2 used in the present embodiment may of course be used as a spacer for separating cables and the like in addition to the above-described retracted structure 1.
Also, in the present embodiment, a description has been given of a case in which the drop-in cable 3 in which four cables 30a to 30d are bundled is used as the drop-in structure 1, but the drop-in cable 3 is a bundle in which two cables are bundled, or Needless to say, a bundle of a plurality of cables such as a bundle of five or six cables may be used. In this case, as the spacer 2 used in the present embodiment, it is preferable to use a spacer having fitting holes 20 corresponding to the number of cables.
[Brief description of the drawings]
FIG. 1 is an overall schematic diagram of a retractable structure.
FIG. 2 is a partially enlarged view of FIG. 1, specifically, an enlarged view of a portion surrounded by a circle in FIG. Is partially cut away.
FIG. 3 is a perspective view of a spacer used in a retractable structure.
FIG. 4 is a perspective view of a spacer in which fitting holes are formed in a staggered manner.
FIG. 5 is a perspective view of a spacer in which a notch is provided in a fitting hole.
FIG. 6 is a perspective view of a spacer formed by a ring-shaped member.
FIG. 7 is a perspective view of a spacer formed of a cylindrical ring-shaped member.
FIG. 8 is a schematic view of a conventional lead-in structure, and is an enlarged view of a portion where a cable is pulled out from a pole.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Retraction structure, 2 ... Spacer, 3 ... Retraction cable, 4, 40, 42 ... Retraction wire, 10 ... Pole, 12 ... Anchor, 20a-20d ... Fitting hole, 21a-21d ... Cut part, 30a-30d ... Cables, 41a-41c, 43a-43c ... Connection allowance, 80a-80f ... Connectors

Claims (8)

A hollow pole standing on the ground,
A plurality of cables drawn out from underground through the hollow portion of the pole, and drawn out from a drawing hole provided on a side surface along the height direction of the pole,
A plurality of drop lines that are laid between the pole and the drop object,
A fixture for fixing each of the drop wires to the pole, leaving a connection margin at the end of the drop wire,
A plurality of connectors for electrically connecting the ends of the cables drawn out from the lead-out holes and the ends of the connection margins of the drop-in wires,
In a retraction structure comprising:
A drop-in structure comprising a spacer that separates a tip of each of the cables or a tip of a connection margin of each of the drop wires so that the connecting tools do not contact each other. The retractable structure according to claim 1, wherein the spacer is not fixed to the pole. The retractable structure according to claim 1, wherein the spacer is fixed to the pole. It is a spacer used in the pull-in structure according to any one of claims 1 to 3,
An insertion hole for inserting the cable or the lead-in wire is formed, and by holding the cable or the lead-in wire passed from one side of the spacer to the other side through the insertion hole, A spacer for preventing the connecting device attached to the cable and the drop wire from coming into contact with each other on the other side. The spacer according to claim 4,
The said insertion hole is formed in a line, The spacer characterized by the above-mentioned. The spacer according to claim 4,
The spacer, wherein the insertion holes are formed in a staggered manner. The spacer according to any one of claims 4 to 6,
A spacer comprising a ring-shaped member which forms the insertion hole at an interval capable of separating the cable or the lead-in wire from each other so that the connecting members do not contact each other on the other side. The spacer according to any one of claims 4 to 7,
A spacer, wherein a notch is formed in each of the insertion holes so as to open the insertion hole along a depth direction of the insertion hole.

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